CN115027559B - Self-balancing semi-trailer frame - Google Patents
Self-balancing semi-trailer frame Download PDFInfo
- Publication number
- CN115027559B CN115027559B CN202210808582.0A CN202210808582A CN115027559B CN 115027559 B CN115027559 B CN 115027559B CN 202210808582 A CN202210808582 A CN 202210808582A CN 115027559 B CN115027559 B CN 115027559B
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- girder
- frame
- balancing
- balance plate
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- 239000000725 suspension Substances 0.000 claims abstract description 10
- 230000001133 acceleration Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 17
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
- B62D21/20—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17 trailer type, i.e. a frame specifically constructed for use in a non-powered vehicle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S9/00—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks
- B60S9/02—Ground-engaging vehicle fittings for supporting, lifting, or manoeuvring the vehicle, wholly or in part, e.g. built-in jacks for only lifting or supporting
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
The invention discloses a self-balancing semitrailer frame which comprises a girder, supporting legs, a suspension system and a balancing adjusting frame, wherein the supporting legs are arranged at the bottom of the front section of the girder, the suspension system is arranged at the bottom of the rear section of the girder, two sides of the girder are welded with square supporting girders, the balancing adjusting frame comprises balancing plates, supporting shafts, rotating shafts, worms and air cylinders, a plurality of balancing plates are sequentially and slidably arranged on the square supporting girders along the length direction of the girder, hydraulic spring rods hinged with the side walls of the girder are arranged at two ends of the balancing plates, supporting arms are hinged to the middle parts of the bottom surfaces of the balancing plates, the supporting shafts are fixed between the two girders through the supporting arms, the rotating shafts are arranged in the girders, one ends of the worms are connected with the rotating shafts, and the other ends of the worms are provided with the air cylinders. According to the invention, the supporting square beams are arranged on two sides of the girder, and the balance adjusting frames are arranged on the supporting square beams, so that the state of the balance plate can be controlled by utilizing the balance adjusting frames, the gravity center position of the goods can be adjusted when the turning gravity center of the semitrailer is unstable, and the stability of the goods during transportation is ensured.
Description
Technical Field
The invention relates to the field of semitrailers, in particular to a self-balancing semitrailer frame.
Background
The semitrailer is a trailer with an axle arranged behind the center of gravity of the vehicle and is provided with a trailer capable of transmitting horizontal and vertical forces to the tractor, and is mainly used for transporting large goods which are large in size and not easy to split. Because the volume of goods pulled by the semitrailer is large, the weight is heavy, the stability requirement of the semitrailer is high, and especially, the semitrailer encounters the condition of turning, if the semitrailer is not high in stability, accidents such as turning over and the like are easy to occur, and the semitrailer has great potential safety hazard.
Disclosure of Invention
The invention aims to provide a self-balancing semi-trailer frame, which can conveniently adjust the center of a pulled goods so as to ensure the stable state of a semi-trailer and improve the safety during transportation.
The invention aims at realizing the following technical scheme:
the utility model provides a self-balancing semitrailer frame, includes girder, landing leg, suspension and balance adjustment frame, the girder is frame and has two, and two girders are fixed side by side, landing leg telescopically installs in girder anterior segment bottom, suspension installs in girder back end bottom, girder both sides welding has many rather than vertically support square beam, balance adjustment frame horizontal installation is on supporting square beam, and balance adjustment frame includes balance plate, support arm, back shaft, pivot, worm and cylinder, the balance plate has the polylith, and polylith balance plate is installed on supporting square beam along girder length direction slidable in proper order, and the balance plate bottom is equipped with the spout of parcel support square beam, and the balance plate both ends are equipped with the hydraulic spring pole articulated with girder lateral wall, and every balance plate bottom surface middle part all articulates there is the support arm, and every support arm all is located the girder middle part, the back shaft passes the support arm in proper order to fix between two girders, the pivot is installed in the inside of frame type girder rotationally, through the bearing frame-type square beam rotatably installs in the support square beam, through the support square beam's the support square beam rotatably, and through the worm is connected with one end of spiral groove through the screw groove of being processed with the worm, the worm is kept away from in the spiral groove is connected with one end through the screw groove.
The two side surfaces of the balance plate are hinged with fence plates parallel to the girder, the end parts of the fence plates are provided with telescopic frames which can slide along the length direction of the fence plates, and the telescopic frames on the adjacent fence plates are hinged in sequence.
The top of the front end of the girder is provided with a portal frame, and a fence plate adjacent to the portal frame is detachably arranged on the portal frame.
The middle part of one end of the support square beam far away from the girder is provided with a bar-shaped hole along the length direction, the bottom of the balance plate is provided with a limiting pin capable of reciprocating in the bar-shaped hole, the limiting pin is sleeved with a pin sleeve, and the outside of the pin sleeve is symmetrically provided with reset springs distributed along the length direction of the bar-shaped hole.
The bottom of the balance plate is provided with a horizontal sensor and a weight sensor, the two sides of the balance plate are provided with acceleration sensors, the horizontal sensor, the weight sensor and the acceleration sensors are connected with a control system of the semi-trailer, the control system of the semi-trailer is provided with a map module, map data of a running route of the semi-trailer are stored in the map module, and the control system of the semi-trailer controls the balance adjusting frame to work according to the data in the map module.
And a driving rotating shaft speed reducing motor is arranged at the end part of the girder.
The self-balancing semitrailer frame provided by the invention has the beneficial effects that:
(1) The two sides of the girder are provided with the supporting square girders, and the supporting square girders are provided with the balance adjusting frames, so that the balance adjusting frames can be used for controlling the states of the balance plates, the gravity center positions of cargoes can be adjusted when the turning gravity centers of the semitrailers are unstable, the stability of the cargoes in transportation is ensured, meanwhile, the balance plates are provided with a plurality of blocks, and the adjusting efficiency of the gravity center positions of the cargoes in the corresponding areas can be improved by utilizing the plurality of blocks of the balance plates, so that the stability of the semitrailer in transportation is ensured;
(2) The levelness of the balance bar can be controlled by arranging the hydraulic spring bars at the two ends of the balance plate, so that the stability of goods is ensured, and the rollover accident caused by the gravity center deviation of the goods when the semitrailer passes through the inclined ground and the road section is effectively avoided;
(3) The worm is arranged in the support square beam, and the worm can enable the balance plate to slide a certain distance along the surface of the support square beam under the control of the air cylinder, so that the gravity center position of the balance plate is adjusted, and safety accidents caused by the change of the gravity center position of goods when the semitrailer turns can be avoided;
(4) The fence plate is arranged on the balance plate, and the telescopic frame is arranged, so that the deformation of the single balance plate during adjustment can be adapted, and the protection effect of the fence plate is improved;
(5) Through setting up level sensor, weight sensor, the state and the weight of judgement goods that can be convenient provide reference data for balance plate adjustment to guarantee the stability of goods operation, set up the map module in control system simultaneously, can control the balance plate in advance according to the bend that the map module detected and lie in, in order to guarantee the stability of goods transportation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a second structure according to an embodiment of the present invention.
Fig. 3 is an axial sectional view along a support square beam according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of connection between a worm and a rotating shaft according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a structure of a worm separated from a chute according to an embodiment of the present invention.
Fig. 6 is a schematic view of a usage state according to an embodiment of the present invention.
Reference numerals: 1. a girder; 101. a portal frame; 2. a support leg; 3. a suspension system; 4. supporting a square beam; 401. a through port; 402. a bar-shaped hole; 5. a balance adjusting frame; 501. a balance plate; 502. a chute; 503. a spiral groove; 504. a hydraulic spring rod; 505. a support arm; 506. a support shaft; 507. a rotating shaft; 508. a worm; 509. a cylinder; 510. umbrella teeth group; 511. a fence panel; 512. a telescopic frame; 513. a limiting pin; 514. a pin sleeve; 515. a reset spring; 516. a speed reducing motor; 6. a control system; 7. a level sensor; 8. a weight sensor; 9. an acceleration sensor.
Detailed Description
Examples
As shown in fig. 1 to 5, the self-balancing semitrailer frame provided in this embodiment includes a girder 1, two support legs 2, a suspension system 3 and a balancing and adjusting frame 5, where the girder 1 is frame-shaped and has two girders, the two girders 1 are fixed side by a horizontal support beam, the support legs 2 are telescopically installed at the bottom of the front section of the girder 1, the support legs 2 are used for supporting the front end of the girder 1 so as to connect with a tractor, the suspension system 3 is installed at the bottom of the rear section of the girder 1, the suspension system 3 provides support for the semitrailer and follows the tractor, two sides of the girder 1 are welded with a plurality of support square girders 4 perpendicular thereto, the support square girders 4 are used for extending the width of the girder 1 and providing support for stacking goods, the balancing and adjusting frame 5 is horizontally installed on the support square girders 4, the balancing and adjusting frame 5 includes a balancing plate 501, a support arm 505, a support shaft 506, a rotating shaft 507, a worm 508 and a cylinder 509, the balance plate 501 is provided with a plurality of balance plates 501, the plurality of balance plates 501 are sequentially and slidably arranged on the supporting square beam 4 along the length direction of the girder 1, the plurality of balance plates 501 are adopted for partitioning the semitrailer, so that the regional adjustment of the weight can be realized after the balance plates 501 are piled up, on one hand, the energy consumption required by adjusting the balance plates 501 is reduced, on the other hand, the adjustment of the gravity center of the semitrailer is more accurate, thereby effectively improving the stability of the semitrailer in transportation, the bottom of the balance plates 501 is provided with a chute 502 wrapping the supporting square beam 4, a solid roller for reducing the friction force is arranged between the chute 502 and the supporting square beam 4, the chute 502 can provide support and limit for the horizontal movement of the balance plates 501, the stability of the translation of the balance plates 501 is ensured, the two ends of the balance plates 501 are provided with hydraulic spring rods 504 hinged with the side wall of the girder 1, the levelness of the balance plates 501 can be adjusted when the hydraulic spring rods 504 are in a pressurized state, the spring can be utilized to absorb energy and shock after decompression, thereby ensuring the stability of goods operation, the middle part of the bottom surface of each balance plate 501 is hinged with a support arm 505, each support arm 505 is positioned in the middle part of a girder 1, the support shafts 506 sequentially penetrate through the support arms 505 and are fixed between the two girders 1, the support shafts 506 can position the support arms 505 and support the balance plates 501, the support arms 505 can conveniently adjust levelness under the action of the hydraulic spring rods 504, the turning accidents caused by gravity center deviation when a semitrailer passes through an inclined road section can be effectively prevented, the rotating shafts 507 are rotatably arranged in the frame girders 1, the end parts of the girders 1 are provided with a driving rotating shaft 507 reducing motor 516, the reducing motor 516 can drive the rotating shafts 507 to rotate at a low speed, provide supporting force for the gravity center adjustment of the balance plates 501, the worm 508 is rotatably arranged in the supporting square girders 4 through universal bearing seats, the supporting square beam 4 above the worm 508 is provided with a through hole 401, one end of the worm 508 passes through the girder 1 and is connected with the rotating shaft 507 through a bevel gear group 510, so that the worm 508 can rotate at a low speed along with the rotating shaft 507 and is used for controlling the gravity center position of the balance plate 501 in curves and the like, thereby improving the stability of the semitrailer when the semitrailer is overturned, the inner bottom surface of the sliding groove 502 is provided with a spiral groove 503 which is abutted with the worm 508, one end of the worm 508 far away from the rotating shaft 507 is provided with a cylinder 509 which is used for controlling the worm 508 to pass through the through hole 401 and separate or combine with the spiral groove 503, the worm 508 can be controlled to be meshed with the spiral groove 503 under the action of the cylinder 509, thereby driving the balance plate 501 to move left and right on the supporting square beam 4 so as to adjust the position of the gravity center of the goods on the girder 1, improving the stability of the transportation of the goods, and for facilitating the recovery of the balance plate 501 in the position after the semitrailer turns, the middle part of one end of the supporting square beam 4 far away from the girder 1 is provided with a bar-shaped hole 402 along the length direction, the bottom of the balance plate 501 is provided with a limiting pin 513 capable of reciprocating in the bar-shaped hole 402, the limiting pin 513 can provide protection for the balance plate 501 so as to prevent the balance plate 501 from falling off from the supporting square beam 4 or cause deformation of the sliding groove 502 to influence sliding efficiency, the limiting pin 513 is sleeved with a pin sleeve 514, reset springs 515 distributed along the length direction of the bar-shaped hole 402 are symmetrically arranged on the outer part of the pin sleeve 514, and under the action of the reset springs 515, the balance plate 501 can be restored to the original state when not being stressed, and after the balance plate 501 is restored to the original state, the balance plate 501 is limited and locked by a turbine so as to prevent the balance plate 501 from sliding.
In order to improve the stability of goods, as shown in fig. 2, the two side surfaces of the balance plate 501 are hinged with fence plates 511 parallel to the girder 1, the end parts of the fence plates 511 are provided with telescopic frames 512 capable of sliding along the length direction of the fence plates 511, the telescopic frames 512 can improve enough buffer range when the balance plate 501 is adjusted, namely, the protection effect of the fence plates 511 is ensured, the fence plates 511 can be prevented from being damaged by the movement of the balance plate 501, the telescopic frames 512 on the adjacent fence plates 511 are hinged in sequence, in order to ensure the stability of the fence plates 511, the portal frame 101 is mounted at the top of the front end of the girder 1, the fence plates 511 adjacent to the portal frame 101 are detachably mounted on the portal frame 101, and under the support of the portal frame 101, the stability of the fence plates 511 can be ensured, and the protection effect of the fence plates 511 is ensured.
In order to facilitate the adjustment of the balance plate 501, as shown in fig. 1-3, a level sensor 7 and a weight sensor 8 are arranged at the bottom of the balance plate 501, the level sensor 7 is used for detecting the level state of the balance plate 501, the weight sensor 8 is used for detecting the weight of the single balance plate 501, reference data can be provided for adjustment when the semitrailer turns, acceleration sensors 9 are arranged at two sides of the balance plate 501, the acceleration sensors 9 can provide data for the turning speed and the turning radius of the semitrailer, the horizontal sensor 7, the weight sensor 8 and the acceleration sensors 9 can provide parameters for the translation amount of the balance plate 501 in cooperation with the weight sensor 8, the control system 6 of the semitrailer is connected with the map module, map data of the running route of the semitrailer is stored in the map module, the positioning data of the semitrailer can be combined with the map data to judge the size and the distance of the curve in time, and the control system 6 of the semitrailer can control the balance adjusting frame 5 to work according to the data in the map module to ensure the stability of the semitrailer turning.
The application method of the invention is as follows:
when the control system 6 of the semitrailer is used, the balance adjusting frame 5 is controlled to work in combination with the position of the semitrailer, when the balance adjusting frame 5 works, the gear motor 516 close to an inner curve is started in advance according to the turning direction, the gear motor 516 drives the rotating shaft 507 to rotate, at the moment, the air cylinder 509 drives the worm 508 to move upwards, the worm 508 is enabled to be in contact with the sliding groove 502 on the corresponding balance plate 501, the worm 508 is enabled to be meshed with the spiral groove 503, the balance plate 501 is driven to move inwards towards the curve for a certain distance, the gravity center of goods is driven to move inwards, if the goods are large-piece integral goods, the balance plate 501 with the goods is required to be controlled to move simultaneously, at the moment, the air cylinder 509 corresponding to the balance plate 501 stretches out synchronously, if the goods are small-lot goods, the balance plate 501 can be adjusted to move according to the weight distribution condition of the goods, so that the gravity center of the semitrailer is located in the middle of the semitrailer, as shown in fig. 6, the stability of the semitrailer after the semitrailer passes through the curve, if the road surface of the curve is in an inclined state, the control system 6 controls the hydraulic spring rod 504 to stretch out, the balance plate 501 to rotate towards the curve 505, the balance plate to adjust the gravity of the goods, the balance plate 501 is driven to move towards the curve, the straight state of the goods, and the balance plate 501 is guaranteed to stretch back to the middle of the balance plate under the condition of the curve, and the condition of the balance plate 501 is gradually, and the balance plate is guaranteed.
The foregoing is merely a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and substitution based on the technical scheme and the inventive concept provided by the present invention should be covered in the scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and that descriptions of well-known components and processing techniques and procedures are omitted so as not to unnecessarily limit the present invention.
Claims (6)
1. The utility model provides a self-balancing semi-trailer frame which characterized in that: including girder, landing leg, suspension and balance adjustment frame, the girder is frame type and has two, and two girders are fixed side by side, landing leg telescopically installs in girder anterior segment bottom, suspension installs in girder back end bottom, girder both sides welding has many rather than vertically support square beams, balance adjustment frame horizontal installation is on supporting square beam, and balance adjustment frame includes balance plate, support arm, back shaft, pivot, worm and cylinder, the balance plate has the polylith, and polylith balance plate is installed on supporting square beam along girder length direction slidable in proper order, and the balance plate bottom is equipped with the spout of parcel support square beam, and the balance plate both ends are equipped with the hydraulic spring pole articulated with girder lateral wall, and every balance plate bottom surface middle part all articulates there is the support arm, and every support arm all is located the girder middle part, the back shaft passes the support arm in proper order to be fixed between two girders, the pivot is rotationally installed in the inside of frame type girder, the worm passes through the universal bearing frame and installs in the support square beam rotatably, and the worm passes through the support square beam in proper order, and the worm passes through the screw thread groove through the control groove through the support square beam of worm and the screw thread of one end of a set of a roll, and the screw thread is connected with one end of the screw thread groove.
2. The self-balancing semi-trailer frame as claimed in claim 1, wherein: the two side surfaces of the balance plate are hinged with fence plates parallel to the girder, the end parts of the fence plates are provided with telescopic frames which can slide along the length direction of the fence plates, and the telescopic frames on the adjacent fence plates are hinged in sequence.
3. The self-balancing semi-trailer frame as claimed in claim 2, wherein: the top of the front end of the girder is provided with a portal frame, and a fence plate adjacent to the portal frame is detachably arranged on the portal frame.
4. The self-balancing semi-trailer frame as claimed in claim 1, wherein: the middle part of one end of the support square beam far away from the girder is provided with a bar-shaped hole along the length direction, the bottom of the balance plate is provided with a limiting pin capable of reciprocating in the bar-shaped hole, the limiting pin is sleeved with a pin sleeve, and the outside of the pin sleeve is symmetrically provided with reset springs distributed along the length direction of the bar-shaped hole.
5. The self-balancing semi-trailer frame as claimed in claim 1, wherein: the bottom of the balance plate is provided with a horizontal sensor and a weight sensor, the two sides of the balance plate are provided with acceleration sensors, the horizontal sensor, the weight sensor and the acceleration sensors are connected with a control system of the semi-trailer, the control system of the semi-trailer is provided with a map module, map data of a running route of the semi-trailer are stored in the map module, and the control system of the semi-trailer controls the balance adjusting frame to work according to the data in the map module.
6. The self-balancing semi-trailer frame as claimed in claim 1, wherein: and a driving rotating shaft speed reducing motor is arranged at the end part of the girder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210808582.0A CN115027559B (en) | 2022-07-10 | 2022-07-10 | Self-balancing semi-trailer frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210808582.0A CN115027559B (en) | 2022-07-10 | 2022-07-10 | Self-balancing semi-trailer frame |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115027559A CN115027559A (en) | 2022-09-09 |
| CN115027559B true CN115027559B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210808582.0A Active CN115027559B (en) | 2022-07-10 | 2022-07-10 | Self-balancing semi-trailer frame |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202965876U (en) * | 2013-01-09 | 2013-06-05 | 邓修海 | Balance adjustment device of truck and truck |
| CN203268129U (en) * | 2013-05-21 | 2013-11-06 | 山东交通学院 | Semitrailer frame with anti-rollover function |
| CN104709026A (en) * | 2014-12-31 | 2015-06-17 | 盐城工学院 | Automobile turning rollover-preventing control system and method |
| KR101553047B1 (en) * | 2015-02-23 | 2015-09-16 | 김영 | Special purpose vehicle having automatic horizontal controlling apparatus |
| CN205327171U (en) * | 2015-12-25 | 2016-06-22 | 吉林大学 | A device that is used for semitrailer initiatively to prevent bend turning on one's side |
| CN106515879A (en) * | 2016-11-11 | 2017-03-22 | 重庆理工大学 | Automobile cargo carrying center of gravity adjusting mechanism |
| CN109278876A (en) * | 2018-09-08 | 2019-01-29 | 石家庄金多利专用汽车有限公司 | A kind of automatic leveling trailer |
-
2022
- 2022-07-10 CN CN202210808582.0A patent/CN115027559B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202965876U (en) * | 2013-01-09 | 2013-06-05 | 邓修海 | Balance adjustment device of truck and truck |
| CN203268129U (en) * | 2013-05-21 | 2013-11-06 | 山东交通学院 | Semitrailer frame with anti-rollover function |
| CN104709026A (en) * | 2014-12-31 | 2015-06-17 | 盐城工学院 | Automobile turning rollover-preventing control system and method |
| KR101553047B1 (en) * | 2015-02-23 | 2015-09-16 | 김영 | Special purpose vehicle having automatic horizontal controlling apparatus |
| CN205327171U (en) * | 2015-12-25 | 2016-06-22 | 吉林大学 | A device that is used for semitrailer initiatively to prevent bend turning on one's side |
| CN106515879A (en) * | 2016-11-11 | 2017-03-22 | 重庆理工大学 | Automobile cargo carrying center of gravity adjusting mechanism |
| CN109278876A (en) * | 2018-09-08 | 2019-01-29 | 石家庄金多利专用汽车有限公司 | A kind of automatic leveling trailer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115027559A (en) | 2022-09-09 |
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