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CN-121973836-A - Side-turning prevention steering mechanism of carrying trolley

CN121973836ACN 121973836 ACN121973836 ACN 121973836ACN-121973836-A

Abstract

The invention discloses an anti-rollover steering mechanism of a carrying trolley, which comprises a frame main body, four groups of wheel frames and steering connecting frames used for connecting the four groups of wheel frames, wherein the four groups of wheel frames are respectively pivoted at four corners of the bottom of the frame main body, the wheel frames are used for mounting wheels, the front side of the frame main body is pivoted with a steering assembly, the steering assembly is rotationally connected with the steering connecting frames, the steering connecting frames are rectangular frames formed by encircling two cross bars and two longitudinal bars, the four corners of the rectangular frames are respectively pivoted with the four groups of wheel frames, the steering assembly comprises steering bars and steering plates fixedly connected to the lower ends of the steering bars, the tail ends of the steering plates are pivoted with the middle part of one of the cross bars, and the lower ends of the steering bars are pivoted with the front end of the bottom of the frame main body. The invention directly and forcedly drives the four groups of wheel frames to rotate around the respective vertical axes or pivot points through the movement of the rectangular frame, so that the vehicle can rotate around a smaller instantaneous center, and the turning radius is obviously reduced.

Inventors

  • TIAN JINLIANG
  • LI WEI

Assignees

  • 深圳市大鱼智行科技有限公司

Dates

Publication Date
20260505
Application Date
20260305

Claims (7)

  1. 1. The rollover prevention steering mechanism of the carrying trolley is characterized by comprising a frame main body (1), four groups of wheel frames (2) and a steering connecting frame for connecting the four groups of wheel frames (2); the four groups of wheel frames (2) are respectively pivoted to four corners of the bottom of the frame main body (1), and the wheel frames (2) are used for mounting wheels; The front side of the frame main body (1) is also pivoted with a steering assembly (3), and the steering assembly (3) is rotationally connected with the steering connecting frame; The steering connecting frame is a rectangular frame (100) formed by encircling two cross bars (4) and two longitudinal bars (5), and four corner ends of the rectangular frame (100) are respectively pivoted with four groups of wheel frames (2); The steering assembly (3) comprises a steering rod (31) and a steering plate (32) fixedly connected to the lower end of the steering rod (31), the tail end of the steering plate (32) is pivoted with the middle part of one of the cross rods (4), and the lower end of the steering rod (31) is pivoted with the front end of the bottom of the frame main body (1).
  2. 2. The rollover prevention steering mechanism of the carrying trolley according to claim 1, wherein two ends of the cross bar (4) are provided with pivoting members (41), the pivoting members (41) are of a cylindrical structure, and the top of the pivoting members is provided with a circular clamping groove (411); the wheel frame (2) is close to one side of the steering connecting frame and is provided with an auxiliary plate (21), the tail end of the auxiliary plate (21) is provided with a circular clamping block (211), and the circular clamping block (211) is rotatably installed in the circular clamping groove (411).
  3. 3. The rollover prevention steering mechanism for a carrier vehicle as claimed in claim 2, wherein a cylinder (42) is provided on one side of the pivot member (41), and the end portion of the vertical rod (5) is movably caught in the cylinder (42).
  4. 4. The rollover prevention steering mechanism for a carrier vehicle according to claim 2, wherein a fixed rod (43) is arranged on one cross rod (4) close to the steering assembly (3), and the fixed rod (43) is positioned at the middle top of the cross rod (4); The tail end of the steering plate (32) is provided with a through hole (321), and the fixing rod (43) is installed in the through hole (321).
  5. 5. The rollover prevention steering mechanism for a carrier cart as set forth in claim 2, wherein a body stabilizing assembly is provided on the rectangular frame (100) for balancing the center of gravity of the carrier cart when the carrier cart is steered.
  6. 6. The rollover prevention steering mechanism for a carrier vehicle according to claim 5, wherein the body stabilizing assembly comprises a balance bar (6) connected to the middle of two longitudinal bars (5) and a weight plate (7) installed in the middle of the bottom of the frame main body (1); the weight plate (7) is arranged in parallel with the balance bar (6), and the weight plate (7) is positioned right above the balance bar (6); The weight plate (7) is of a U-shaped structure, an opening of the weight plate (7) is upward, and two ends of the weight plate (7) are respectively connected with two sides of the bottom of the frame main body (1); Two balancing weights (8) are slidably arranged on the balancing weight plate (7), and a connecting plate (9) is fixedly connected between the two balancing weights (8); a rotating window (71) is formed in the center of the weight plate (7), a teeterboard (72) is arranged on the rotating window (71), and the middle part of the teeterboard (72) is rotationally connected with the middle part of the rotating window (71) through a pin; One end of the seesaw (72) is rotationally connected with the middle part of the balance rod (6) through a pin, and the other end of the seesaw is rotationally connected with the middle part of the connecting plate (9) through a pin; both ends of the seesaw (72) are of a cylindrical structure, and are movably clamped with extension rods (721); The weight blocks (8) are identical in mass and size.
  7. 7. The rollover prevention steering mechanism for a carrier vehicle as defined in claim 6, wherein a plurality of semicircular tooth grooves (73) are provided on the upper surface of the weight plate (7), and the tooth grooves (73) are located on both sides of the rotation window (71); the bottom of balancing weight (8) is provided with a plurality of semicircular dogteeth (81), dogtooth (81) with tooth groove (73) meshing.

Description

Side-turning prevention steering mechanism of carrying trolley Technical Field The invention relates to the technical field of chassis of transport vehicles, in particular to an anti-rollover steering mechanism of a carrying trolley. Background The carrying trolley (also called camping car and folding handcart) is widely applied to various outdoor scenes and daily short-distance transportation due to the advantages of compact structure, strong carrying capacity, easy storage and carrying and the like. Existing camping vehicles typically include a frame, a running gear set disposed at the bottom of the frame, a basket for carrying items, and a tie rod connected to the frame. The user can easily realize the transfer of material through pulling or pushing the pull rod, has greatly liberated both hands and has reduced physical demands. Although the existing carrying trolley solves the problem of carrying materials to a certain extent, in the actual use process, a plurality of technical defects are still exposed, especially in the complex and changeable outdoor environment, and the technical defects are mainly reflected in the aspects of steering performance and driving stability: First, steering flexibility is insufficient and the turning radius is too large. The existing camping car mostly adopts the structure that front wheels are universal, rear wheels are directional, or four wheels are independent universal wheels. When an independent universal wheel structure is adopted, although the movement in any direction can be realized theoretically, in actual steering operation, four wheels cannot rotate around the same instantaneous steering center in a coordinated manner due to the lack of an effective linkage guiding mechanism. This results in a large sliding frictional resistance of a part of the wheels when the vehicle turns, making the steering operation heavy and laborious. Particularly in narrow woodland small roads, crowded camps or terrains requiring frequent turning, the vehicle is difficult to flexibly shuttle due to the overlarge turning radius, and a user often needs to repeatedly adjust to finish turning, so that the use convenience is greatly reduced. If the front and rear wheel differential design (such as front ten thousand backward orientation) is adopted, although the straight running stability is improved, the flexibility of transverse movement is sacrificed, and the turning radius is still limited by the physical limitation of the wheelbase and the wheel base, so that the fine control requirement under all terrain can not be met. Secondly, roll easily occurs at high speed or fast steering, and stability is poor. With the increasing demands of users for outdoor efficiency, camping vehicles are rapidly pushed on flat roads (such as park walkways and asphalt ways) increasingly. However, the center of gravity design of existing camping vehicles often does not adequately account for dynamic stability. When the vehicle is loaded with heavy objects and runs at a high speed, if emergency steering or rapid lane change is required in case of emergency, the vehicle body is extremely easy to roll or even roll over due to the action of centrifugal force. This roll risk is more pronounced especially for high center of gravity loads (such as stacking higher equipment boxes) or for folded vehicle models with narrower wheelbase. In addition, the suspension system of the existing vehicle is lack of or is simply spring damping, and an effective restraining mechanism for the posture of the vehicle body under a steering working condition is lacked, so that the wheel grabbing force is unevenly distributed at the moment of steering, the trend of sideslip and rolling is further aggravated, a large potential safety hazard exists, articles in the vehicle can be scattered and damaged, and the safety of users and surrounding personnel is even endangered. In summary, although the existing carrying trolley is widely applied to the outdoor and daily carrying scenes, the existing carrying trolley still has obvious defects in the aspects of turning radius control, high-speed steering stability and the like. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide an anti-rollover steering mechanism of a carrying trolley, so as to solve the problems that the existing carrying trolley is overlarge in turning radius and easy to roll during rapid steering. In order to solve the technical problems, the invention is realized by the following scheme: The invention discloses an anti-rollover steering mechanism of a carrying trolley, which comprises a trolley frame main body, four groups of trolley frames and steering connecting frames used for connecting the four groups of trolley frames, wherein the four groups of trolley frames are respectively pivoted at four corners of the bottom of the trolley frame main body and are used for installing wheels, the front side of the trolley frame main body is