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CN-113212572-B - Follow-up device for driving semitrailer carriage to turn and move backwards and semitrailer

CN113212572BCN 113212572 BCN113212572 BCN 113212572BCN-113212572-B

Abstract

The invention discloses a follow-up device for driving a semitrailer carriage to turn backwards and a semitrailer, wherein the follow-up device is positioned between a tractor and the semitrailer carriage and comprises a saddle, a crank sliding block mechanism, a generating mechanism and a driving mechanism. When the semitrailer turns, an included angle is formed between the tractor cab and the axis of the semitrailer carriage, the driving mechanism drives the two transmission worms of the generating mechanism to reversely operate, so that the crank slider mechanism drives the saddle to longitudinally move backwards, the follow-up backward movement adjustment of the semitrailer carriage is realized, the gap between the tractor cab and the semitrailer carriage of the semitrailer is enlarged, and the whole vehicle is restored to a state of reducing wind resistance after the turning is finished. The follow-up device can reduce the gap between the tractor cab and the semitrailer box of the semitrailer so as to achieve the purpose of reducing the wind resistance and the oil consumption of the semitrailer and overcome the turning problem. The semitrailer with the follow-up device has the advantages of smaller wind resistance and lower energy consumption, thereby reducing the transportation cost.

Inventors

  • CHEN QINGGUO

Assignees

  • 河北科技大学
  • 河北科技大学

Dates

Publication Date
20260421
Application Date
20210421
Priority Date
20210421

Claims (7)

  1. 1. A follower device for driving a semitrailer compartment to turn backwards, characterized in that: the follow-up device is positioned between the tractor (100) and the semitrailer carriage (200) and comprises a saddle (1), a crank block mechanism, a generating mechanism and a driving mechanism; The saddle (1) is positioned behind the tractor (100) and is connected with the semitrailer carriage (200) through a traction pin shaft; the generating mechanism comprises two transmission worms (21) which are parallel in the longitudinal direction and are arranged at intervals and a gear pair hobbing system (22) which drives the two transmission worms (21) to reversely rotate, wherein the gear pair hobbing system (22) is transversely arranged and consists of an even number of transmission gears which are meshed with each other, and the two transmission worms (21) are respectively connected with the transmission gears at the two ends of the gear pair hobbing system (22); the driving mechanism is connected with any transmission gear of the gear hobbing system (22) and drives the gear hobbing system to rotate, and comprises a follow-up pin (41), a follow-up rocker (42) and a driving gear train, wherein A follower rocker (42) arranged along the longitudinal direction and provided with a longitudinal slot (421), wherein the rear end of the follower rocker (42) is hinged with the tractor (100); The follow-up pin (41) is positioned in front of the traction pin shaft and is vertically arranged, the upper end of the follow-up pin is fixed at the front end of the bottom of the semitrailer box (200), and the lower end of the follow-up pin is arranged in a longitudinal slot (421) of the follow-up rocker (42) and can slide along the longitudinal slot (421); The driving gear train comprises a driving conical gear (43) fixed with the rear end of the follow-up rocker (42), a driven conical gear (44) meshed with the driving conical gear (43) is arranged below the driving conical gear (43), and the driven conical gear (44) is connected with any transmission gear in the gear hobbing gear train (22) through a main transmission shaft; Crank slider mechanism, including locating between two driving worm (21) and with the central worm wheel (31) of two driving worm (21) meshing, eccentric vertical locating eccentric round pin axle (32) of central worm wheel (31) upper surface and the saddle slider (33) that upper surface and saddle (1) are fixed, horizontal recess (331) have been seted up to the front end of saddle slider (33), and in vertical spout (34) were located to its rear end, eccentric round pin axle (32) are located horizontal recess (331), the horizontal length value of horizontal recess (331) is greater than or equal to the twice of the distance value of eccentric round pin axle (32) from central worm wheel (31) center, saddle slider (33) can follow vertical spout (34) reciprocating motion along with eccentric round pin axle (32) rotation.
  2. 2. A follower device for driving a semitrailer wagon to turn backward according to claim 1, wherein the driving bevel gear (43) has a sector structure.
  3. 3. A follower device for driving a semitrailer according to claim 1, wherein a transition gear train is further provided between the main drive shaft and the counter gear train (22).
  4. 4. A follower device for driving a semitrailer wagon to turn backward according to claim 3, wherein the transition gear train comprises a first transition gear (45) connected with the main transmission shaft, a second transition gear (46) meshed with the first transition gear (45), a third transition gear (47) connected with the second transition gear (46) through the transmission shaft, and a fourth transition gear (48) meshed with the third transition gear (47), and the fourth transition gear (48) is connected with any transmission gear of the counter-hobbing gear train (22).
  5. 5. The following device for driving the semitrailer carriage to turn backwards according to claim 1, wherein the distance between the eccentric pin shaft (32) and the center of the center worm wheel (31) is greater than or equal to 300-360 mm.
  6. 6. A follower device for driving a semitrailer according to claim 1, wherein the counter-hobbing system (22) consists of four intermeshing transmission gears.
  7. 7. A semitrailer comprising the follower device according to any one of claims 1 to 6.

Description

Follow-up device for driving semitrailer carriage to turn and move backwards and semitrailer Technical Field The invention relates to the field of semitrailers, in particular to a follow-up device for driving a semitrailer carriage to turn backwards and a semitrailer. Background The competition of semi-trailer markets is increasing, which requires manufacturers to continuously reduce oil consumption, improve the transportation capacity of the semi-trailer, reduce the wind resistance of trucks and further improve the market competitiveness. It has been confirmed that when the vehicle is traveling at a high speed, the maximum resistance is derived from air, and the higher the vehicle speed, the greater the air resistance the vehicle receives, and the air resistance increases in proportion to the square of the vehicle speed increase. Experiments show that when the vehicle speed is higher than 80km per hour, almost half of the oil consumption is used for overcoming the air resistance. The semi-trailer has surface resistance when running. The surface resistance refers to frictional resistance generated when an air flow passes through the outer surface of the vehicle, and is mainly caused by the shape of the vehicle body and interference of components mounted outside the vehicle body with the air flow. The resistance of the semi-trailer is also partly due to the fact that the gap between the tractor cab and the semi-trailer box of the semi-trailer is larger, about 1.5 meters, vortex is formed in running, large wind resistance is generated, the wind resistance is 25% of the whole wind resistance, and the semi-trailer is particularly prominent in high-speed running, and the total fuel consumption is 3-5%. For reducing the gap between the tractor cab and the semitrailer of the semitrailer, the front angle of the semitrailer and the rear edge of the tractor cab are in interference contact during turning, so that the semitrailer is blocked from turning. Disclosure of Invention The invention aims to solve the technical problem of providing a follow-up device and a semitrailer for driving a semitrailer carriage to move backwards when the semitrailer turns, so that the gap between the tractor cab and the semitrailer carriage of the semitrailer can be reduced, the wind resistance of the semitrailer can be reduced, the problem that the front angle of the semitrailer carriage interferes with the rear edge of the tractor cab when the semitrailer turns is solved, and the follow-up device and the semitrailer for driving the semitrailer carriage to move backwards when the semitrailer can enter a low wind resistance running state again after turning. In order to solve the technical problems, the invention adopts the following technical scheme: A follow-up device for driving a semitrailer carriage to turn backwards is characterized by comprising a saddle, a crank sliding block mechanism, a generating mechanism and a driving mechanism, wherein the follow-up device is positioned between a tractor and the semitrailer carriage and comprises a saddle, the crank sliding block mechanism, the generating mechanism and the driving mechanism, the saddle is positioned behind the tractor and is connected with the semitrailer carriage through a traction pin shaft, the generating mechanism comprises two transmission worms which are parallel and spaced along the longitudinal direction and a pair of gear trains for driving the two transmission worms to reversely rotate, the pair of gear trains are transversely arranged and are formed by an even number of mutually meshed transmission gears, the two transmission worms are respectively connected with the transmission gears positioned at two ends of the pair of gear trains, the driving mechanism is connected with any one transmission gear of the pair of gear trains and drives the gear trains to rotate, the crank sliding block mechanism comprises a central worm wheel which is arranged between the two transmission worms and is meshed with the two transmission worms, an eccentric pin shaft which is eccentrically and vertically arranged on the upper surface of the central worm wheel, and a saddle sliding block which is fixed on the upper surface of the saddle, the front end of the saddle sliding block is provided with a transverse groove, the rear end of the saddle sliding block is arranged in the longitudinal groove, the transverse groove is formed in the transverse groove, the transverse groove is formed, and the transverse length of the transverse groove is larger than the transverse length of the transverse groove or the transverse length of the transverse groove is equal to the longitudinal length of the central pin, and the eccentric pin is capable of reciprocating along with the longitudinal length of the longitudinal axis. The driving mechanism comprises a follow-up pin, a follow-up rocker and a driving gear train, wherein the follow-up rocker is arranged in the longitudinal direction and is prov