A kind of auxiliary support follow-up steering type central axle trailer

Abstract

The present invention discloses an auxiliary-supported follow-up steering type mid-axle trailer, which relates to the technical field of trailers and includes a trailer carrier; further comprising: a driving mechanism is provided in the middle of the bottom surface of the trailer carrier, and the driving mechanism includes a driving top plate; 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; wherein support mechanisms are provided on both the front and rear sides of the bottom of the driving mechanism, and the support mechanisms include a supporting frame. The auxiliary-supported follow-up steering type mid-axle trailer is connected to the driving vehicle body through the driving mechanism under the trailer carrier, 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 support 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 to the shock-absorbing leaf spring to avoid the reduction of the support effect due to high temperature.

Description

Technical Field

[0001] The present 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, also known as a center-axle trailer, is a trailer with the axle placed in the center of the trailer. It is a type of full trailer. Because the axle is installed in the middle of the vehicle body, it cannot maintain balance on its own. When not connected to other vehicles, it needs to use liftable outriggers to maintain stability. The mid-axle trailer moves and turns with the tractor during towing and carrying.

[0003] The invention with publication number CN112208659A discloses a skeleton-type transport semi-trailer. By arranging a connecting part and a connecting mechanism 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, which 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 connect with the corresponding assembly holes on the external platform such as the supporting or loading platform, which is not only convenient to disassemble and assemble, but also has a reliable connection.

[0004] The invention with publication number CN104843098A discloses a semi-trailer with steering. The front A-frame and the rear A-frame are both wedge-shaped. The top end of the front A-frame is connected to a retractable front telescopic arm, and the top end of the rear A-frame is connected to a retractable rear telescopic arm. The front telescopic arm and the rear telescopic arm are hingedly connected. The present invention uses a mechanical structure to achieve steering of the semi-trailer, reduce tire wear, and reduce the vehicle's minimum turning radius and channel width.

[0005] However, the above-mentioned trailer with steering function still has the following problems during actual use: although the trailer is assisted in steering by a rotatable drive wheel group, the installation of such a steering mechanism requires each set of drive wheels on the trailer to be driven separately, and the independent steering components are 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 their central position, making it difficult to ensure the stability of the mounting and the safety of transportation.

[0006] Therefore, we propose a kind of auxiliary support follow-up steering type center axle trailer, in order to solve the problems raised in above-mentioned. Summary of the Invention

[0007] The purpose of the present invention is to provide an auxiliary supported follow-up steering type central axle trailer, in order to solve the existing problem of steering the trailer with auxiliary driving wheels, but the installation of such 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.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: an auxiliary-supported follow-up steering-type central-axle trailer, comprising a trailer carrier frame, a carrier base fixedly mounted on the top surface of the trailer carrier frame, and a telescopic support assembly provided below the right end of the trailer carrier frame; and further comprising:

[0009] 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 bilaterally symmetrical manner;

[0010] 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;

[0011] Among them, support mechanisms are provided 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 provided on both the left and right sides of the bottom surface of the symmetrically arranged support frame.

[0012] 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 at equal distances, and a shock-absorbing leaf spring is rotatably arranged on the upper inner part of the adjacent connecting support seat, and the lower inner part of the adjacent connecting support seat is hingedly connected to the inner end of the supporting connecting rod.

[0013] 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 link, and a transmission drum is fixedly installed in the middle of the driving bridge, and a driving link is rotatably arranged inside the transmission drum through a bearing.

[0014] Preferably, the driving mechanism includes a driving shaft on both the front and rear sides of the driving bridge, which is rotatably provided with a driving shaft through 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 inside of the transmission drum and realizes transmission between the driving connecting rod.

[0015] Preferably, the steering fan plate included in the steering mechanism is fixedly installed on 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.

[0016] Preferably, the driving top plate included in the steering mechanism is rotatably arranged on the bottom surface of the trailer carrier frame through the steering positioning disk at the 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.

[0017] 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.

[0018] Preferably, the support mechanism includes a spiral rotating rod, and the left end of the spiral rotating rod spirally 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 with 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 spring distributed correspondingly below.

[0019] 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.

[0020] 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 connected through it to achieve cooling and heat dissipation.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the auxiliary support 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 support 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 support effect due to high temperature. The specific contents are as follows:

[0022] 1. The drive connecting rod is connected to the vehicle's travel drive components. The rotating transmission drive shaft engages with the splines and differential installed inside the transmission drum, thereby driving the front and rear drive shafts and drive wheels to rotate, thereby providing driving force for the trailer frame, thereby reducing the traction burden of the vehicle body and improving the trailer frame's ability to pass through extreme terrain.

[0023] The driving top plate is connected to the shock-absorbing leaf spring through the connecting support seat on the bottom surface. At the same time, the bottom end of the adjacent connecting support seat is hinged to the support link, so that the driving wheel group can be supported by the shock-absorbing leaf spring and the support link, so as to achieve the effect of shock absorption and improving stability in potholes.

[0024] 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 surface 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.

[0025] 3. The steering drive shaft drives the positioning frame and the hinged abutment 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 gear plate to slide downward, thereby driving the damping supporter fixedly connected at the bottom to descend, and then abut 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 tilt of the trailer load frame during the steering process.

[0026] The positioning frame drives the resistance flip rod on the other side away from the support 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 support of the shock-absorbing leaf spring on the other side during the steering process, so as to achieve a balanced support effect during roll.

[0027] 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

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the installation structure of the traveling mechanism and the trailer carrier frame of the present invention;

[0030] Figure 3This is a schematic diagram of the three-dimensional structure of the traveling mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the drive connecting rod installation structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the installation structure of the shock-absorbing leaf spring and the supporting connecting rod of the present invention;

[0033] Figure 6 This is a schematic diagram of the support frame installation structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the three-dimensional structure of the pressure water tank of the present invention;

[0035] Figure 8 This is a schematic diagram of the three-dimensional structure of the transmission drum of the present invention;

[0036] Figure 9 This is a schematic diagram of the installation structure of the steering fan plate and the steering drive shaft of the present invention;

[0037] Figure 10 This is a schematic structural diagram of the steering drive shaft of the present invention after rotation;

[0038] Figure 11 Schematic diagram of the structure of the damping support of the present invention;

[0039] Figure 12 This is a schematic diagram of the pressure water tank installation structure of the present invention.

[0040] 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. Support frame; 9. Damping support; 10. Connecting support seat; 11. Shock-absorbing leaf spring; 12. Support 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. Screw rod; 23. Driving gear; 24. Driving gear plate; 25. Pressure water tank; 26. Cooling spray pipe. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] See also Figures 1-12 , the present invention provides the following technical solutions:

[0043] Example 1: In order to solve the problems existing in the use of existing mid-axle trailers, this embodiment adopts the following technical solution: an auxiliary supported follow-up steering mid-axle trailer, including a trailer carrier frame 1, and a carrier base plate 2 fixedly installed on the top surface of the trailer carrier frame 1, and a telescopic support assembly 3 is provided below the right end of the trailer carrier frame 1; 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 the driving wheel group 5 is provided on the front and rear sides of the bottom of the driving top plate 4 in a left-right symmetrical manner.

[0044] 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 link 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 link 12, and a transmission drum 14 is fixedly arranged in the middle part of the driving bridge 13, and a driving link 15 is rotatably arranged inside the transmission drum 14 through a bearing; the driving mechanism includes a driving shaft 16 rotatably arranged on both the 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 link 15.

[0045] like Figure 4 、 Figure 8 As shown, the trailer carrier 1 is first connected to the driving vehicle, and the driving connecting rod 15 extending from the bottom of the trailer carrier 1 is connected to the driving member of the vehicle body. Then, during the driving process of the vehicle body, the driving shaft 16 is rotated. 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 1, so as to reduce the traction burden of the vehicle body and improve the passability of the trailer carrier 1 in extreme terrain.

[0046] 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 support link 12, so that the driving wheel group 5 can be supported by the shock-absorbing leaf spring 11 and the support link 12, so as to achieve the effect of shock absorption and improving stability in potholes.

[0047] Example 2: In order to solve the problems existing in the use of existing central axle trailers, this embodiment adopts the following technical solutions: 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 slidingly provided 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 provided 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 meshed and connected with each other through a bevel gear set 18, and a positioning frame 19 is installed on the outer wall of the steering drive shaft 7.

[0048] 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.

[0049] like Figure 5-Figure 6 、 Figure 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.

[0050] Example 3: In order to solve the problems existing in the use of the existing central axle trailer, this embodiment adopts the following technical solution, 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 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.

[0051] The supporting mechanism includes a spiral rod 22, and the left end of the spiral rod 22 spirally passes through the interior of the guide slider 21, and the left and right outer walls of the spiral 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 correspondingly distributed shock-absorbing leaf spring 11 below.

[0052] like Figures 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 the driving gear plate 24 to slide downward, thereby driving the damping support 9 fixedly connected at the bottom to descend, and then resisting 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 roll, thereby reducing the tilt of the trailer carrier 1 during the steering process.

[0053] Furthermore, the positioning frame 19 drives the resistance flip rod 20 on the other side away from the support 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 support of the shock-absorbing leaf spring 11 on the other side during the steering process, so as to achieve a balanced support effect during roll.

[0054] The support mechanism includes a pressure water tank 25 fixedly installed on the inner side of the support 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 support 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 connected thereto to achieve cooling and heat dissipation.

[0055] like Figure 7 、 Figure 11-12 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 resists 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 the shock-absorbing leaf spring 11 through the through-connected cooling spray pipe 26 to cool it down, thereby avoiding the shock-absorbing leaf spring 11 that has been in reciprocating deformation for a long time from reducing its supporting effect due to high temperature, thereby improving the stability of the entire trailer during transportation and steering.

[0056] 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 scope of protection of the present invention.

Claims

1. An auxiliary supported follow-up steering type central axle trailer, comprising a trailer carrier frame (1), and a carrier base plate (2) fixedly mounted on the top surface of the trailer carrier frame (1), and a telescopic support assembly (3) is provided below the right end of the trailer carrier frame (1); It is characterized by: 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 of the driving top plate (4) in a bilaterally 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 provided 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 provided on both the left and right sides of the bottom surface of the symmetrically arranged support frame (8); The steering mechanism includes a steering fan plate (6) fixedly mounted on the middle portion of the bottom surface of the driving top plate (4), and a steering positioning disc (17) is fixedly provided on the bottom surface of the driving top plate (4), and the bottom end of the steering positioning disc (17) and the steering drive shaft (7) are meshed and connected with each other through a bevel gear set (18), and a positioning frame (19) is sleeved and mounted on the outer wall of the steering drive shaft (7); The driving top plate (4) included in the steering mechanism is rotatably arranged on the bottom surface of the trailer carrier frame (1) through 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); 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); The support mechanism includes a spiral rod (22), and the left end of the spiral rod (22) spirally penetrates the interior of the guide slider (21), and the left and right outer walls of the spiral 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 correspondingly distributed damping leaf spring (11) below.

2. The auxiliary support follow-up steering type central axle trailer according to claim 1, characterized in that: 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 provided 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 central axle trailer according to claim 2, characterized in that: 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 link (12), and a transmission drum (14) is fixedly provided in the middle part of the driving bridge (13), and a driving link (15) is rotatably provided inside the transmission drum (14) through a bearing.

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

5. The auxiliary support follow-up steering type central axle trailer according to claim 1, characterized in that: The support mechanism includes a pressure water tank (25) fixedly mounted on the inner side of the support 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).

6. The auxiliary support follow-up steering type central axle trailer according to claim 5, 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) connected therethrough to achieve cooling and heat dissipation.

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