WO2023134170A1

WO2023134170A1 - Suspension assembly of trailer, and trailer

Info

Publication number: WO2023134170A1
Application number: PCT/CN2022/114286
Authority: WO
Inventors: 吴志强; 刘伟权
Original assignee: 广东富华重工制造有限公司
Priority date: 2022-01-17
Filing date: 2022-08-23
Publication date: 2023-07-20
Also published as: CN116476581A

Abstract

A suspension assembly of a trailer, the suspension assembly comprising a support (20), an intermediate support (10), a connecting support (30), a balance beam (60), an axle (40), a steel plate spring (50) and a connecting rod (70), wherein the support (20), the intermediate support (10) and the connecting support (30) are all fixed to the frame of the trailer, and the connecting support (30) is located between the intermediate support (10) and the support (20); a middle portion of the balance beam (60) is pivoted on the intermediate support (10), with one end of the balance beam forming a swing end; the axle (40) is fixed to a middle portion of the steel plate spring (50), one end of the steel plate spring (50) is connected to the support (20), the other end of the steel plate spring is connected to the swing end of the balance beam (60) in a penetrating manner, and the other end of the steel plate spring (50) is in vertical floating fit with the swing end of the balance beam (60); and one end of the connecting rod (70) is hinged to the axle (40), the other end of the connecting rod is hinged to the connecting support (30), a limiting surface (71) is formed on an upper surface of the connecting rod (70), a limiting portion (80) is provided on the frame of the trailer, and the swing end swings between the limiting surface and the limiting portion. By means of the trailer assembly, the swing amplitude of the balance beam is reduced, the steel plate spring is prevented from being separated from the swing end of the balance beam, and the length of the connecting rod is shortened, so that the connecting rod is less prone to deformation. A trailer is further comprised.

Description

Trailer suspension assembly and trailer

technical field

The invention relates to the technical field of vehicles, in particular to a suspension assembly of a trailer and the trailer.

Background technique

The suspension assembly is the main load-bearing part of the trailer. The suspension assembly of the existing trailer generally includes a middle bracket, a bracket, a balance beam, a leaf spring, a connecting rod, etc. The middle bracket and the bracket are welded on the frame of the trailer, and the balance beam Pivoted on the middle bracket, one end of the leaf spring is connected to the bracket, and the other end is connected to the end of the balance beam and can float up and down with the end of the balance beam. The axle is fixed in the middle of the leaf spring through the support. A connecting rod is connected with the middle bracket, and the connecting rod is used to prevent the axle from swinging back and forth. When the existing structure is suitable for a long wheelbase, the distance between the axle and the middle bracket increases due to the increase of the wheelbase, so It is necessary to adaptively increase the length of the balance beam and the length of the connecting rod. The increase in the length of the balance beam will lead to an increase in the swing range at the end of the balance beam, making it easy for the leaf spring to be separated from the position of the balance beam, causing a safety hazard. , due to the increase in the length of the connecting rod, the stability of the connecting rod is poor. Specifically, the length of the connecting rod is increased, and it is easy to deform when it is stressed. In summary, it is difficult for the existing suspension assembly to be suitable for long Wheelbase suspension requirements.

Contents of the invention

In view of the deficiencies in the prior art, the first object of the present invention is to provide a suspension assembly of a trailer, which can meet the requirement of a long wheelbase of the trailer and improve the safety of the trailer with a long wheelbase.

The second object of the present invention is to propose a trailer.

To achieve the above object one, the present invention adopts the following technical solutions:

The suspension assembly of the trailer is installed under the frame of the trailer, including brackets, middle brackets, connecting brackets, balance beams, axles, leaf springs and connecting rods;

The bracket, the middle bracket and the connecting bracket are all fixed on the frame of the trailer, and the connecting bracket is located between the middle bracket and the bracket;

The middle part of the balance beam is pivotally connected to the middle support, and one end forms a swing end;

The axle is fixed in the middle of the leaf spring, one end of the leaf spring is connected to the bracket, the other end is connected to the swing end of the balance beam, and the other end of the leaf spring is matched with the swing end of the balance beam to float up and down;

One end of the connecting rod is hinged to the axle, and the other end is hinged to the connecting bracket. The upper surface of the connecting rod forms a limiting surface located below the swinging end. The frame of the trailer is provided with a limiting portion located above the swinging end. Swing between the limiting surface and the limiting part.

The swing end of the balance beam is fixed with a limit shaft extending along the width direction of the balance beam, and the limit shaft cooperates with the limit surface to limit the degree of freedom for the swing end to swing downward.

The balance beam includes two side plates located on both sides of the balance beam, the limit shaft crosses the balance beam and its two ends are respectively fixed on the two side plates.

A protruding portion protruding downward is provided on one side of the two side plates located at the bottom of the swing end, and the two ends of the limiting shaft are respectively fixed on the protruding portions of the two side plates.

Both side plates are provided with at least two installation holes arranged along the height direction, the limit shaft is a bolt, and the bolt crosses the two installation holes at the same height on the two side plates, and is locked by fastening nuts on the balance beam.

The part of the bolt located between the two side plates is sheathed with an anti-collision sleeve.

The connecting bracket includes two opposite side walls, a balance beam is passed between the two side walls, a first rotating shaft is connected between the bottoms of the two side walls, and the other end of the connecting rod is pivotally connected to the first rotating shaft.

The axle is fixed on the leaf spring through a seat assembly, and a second rotating shaft is arranged on the seat assembly, and one end of the connecting rod is pivotally connected to the second rotating shaft.

The support assembly includes a lower support located below the axle, an upper support located above the axle and clamped between the axle and the leaf spring, U-shaped bolts, the axle is clamped between the lower support and the upper support, and the U-shaped The bolts are straddled on both sides of the leaf spring, and the two ends of the bolts respectively extend downwards through both sides of the lower support, and the parts where the two ends of the U-shaped bolt pass through the lower support are screwed with lock nuts.

For realizing above-mentioned object two, the present invention adopts following technical scheme:

The trailer includes the above-mentioned suspension assembly of the trailer.

The beneficial effects of the present invention are:

In the present invention, since a connecting bracket is set between the bracket and the middle bracket, the connecting rod is connected between the axle shaft and the connecting bracket, and the upper surface of the connecting rod limits the maximum angle at which the balance beam swings downward, thereby reducing the The swing range of the balance beam prevents the leaf spring from detaching from the swing end of the balance beam. Since the connecting rod is connected between the axle and the connecting bracket, the length of the connecting rod is shortened, and the connecting rod bears the pressure position of the swing end of the balance beam. It is far away from the middle of the length direction of the connecting rod, so that the connecting rod is not easy to be deformed, and the safety of the trailer is improved, and it is especially suitable for some trailers with a long wheelbase.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is A-A sectional view of Fig. 1;

FIG. 3 is a schematic structural diagram of the balance beam in FIG. 1 .

Detailed ways

Below, in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

As shown in Figures 1, 2, and 3, it is a suspension assembly of a trailer of the present invention, which includes a bracket 20, a middle bracket 10, a connecting bracket 30, a balance beam 60, an axle 40, a leaf spring 50, and a connecting rod 70; Bracket 20, middle bracket 10, connecting bracket 30 are all welded and fixed on the vehicle frame of trailer, and connecting bracket 30 is positioned between bracket 20 and middle bracket 10, and connecting bracket 30 is in the position near middle bracket 10, and balance beam 60 The middle part of the middle bracket is pivotally connected to the middle bracket 10, and one end forms a swing end. The axle 40 is fixed on the middle part of the leaf spring 50. One end of the leaf spring 50 is connected to the bracket 20, and the other end is connected to the swing end of the balance beam 60. , and the other end of the leaf spring 50 can cooperate with the swing end of the balance beam 60 to float up and down. One end of the connecting rod 70 is hinged to the axle 40, and the other end is hinged to the connecting bracket 30. The upper surface of the connecting rod 70 forms a limit surface 71 located below the swing end, and a limit surface 71 located above the swing end is provided on the trailer frame. part 80, the limit part 80 can be an upside-down channel steel welded on the frame, the swing end swings between the limit surface 71 and the limit part 80, and it can pass through the limit surface 71 and the limit part 80 The maximum swing angle of the swing end is limited, thereby limiting the swing range of the balance beam 60 from being too large.

In a preferred embodiment, the present invention fixes a limit shaft 62 extending along the width direction of the balance beam 60 at the swing end of the balance beam 60. When the limit shaft 62 swings downward with the swing end of the balance beam 60, the limit The shaft 62 is in contact with the limit surface 71, and then the limit shaft 62 is used to cooperate with the limit surface 71 to form a limit mechanism to limit the degree of freedom for the swing end of the balance beam 60 to swing downward, and then limit the downward swing of the balance beam 60. The maximum swing angle is only required to prevent the other end of the leaf spring 50 from breaking away from the swing end of the balance beam 60 under the maximum angle. The balance beam 60 includes two side plates 63 respectively located on both sides thereof. After the limit shaft 62 traverses the balance beam 60, its two ends are respectively fixed on the two side plates 63, so that the position limit shaft 62 is located on both sides. The part between the plates 63 forms a part in contact with the limit surface 71. In order to further reduce the maximum angle of the downward swing of the balance beam 60, a downward protrusion is provided on the side of the side plate 63 at the bottom of the swing end. The protruding portion 61 and the two ends of the limit shaft 62 are respectively fixed on the protruding portion 61 of the two side plates 63, so that the position of the limit shaft 62 can be set as low as possible, and the limit shaft 62 can be reduced. The distance from the limiting surface 71 further reduces the maximum angle at which the balance beam 60 can swing downward. In addition, in order to increase the scope of application, the height of the above-mentioned limit shaft 62 can be set to be adjustable so that it can be adjusted according to the actual installation situation. Specifically, two side plates 63 are provided with At least two mounting holes 64 are arranged, and two mounting holes 64 with the same height on the two side plates 63 are arranged in pairs. In the two installation holes 64, the limit shaft 62 is locked and fixed on the balance beam 60 by a fastening nut 66 at the same time. When assembling, the limit shaft 62 penetrates from one side of the balance beam 60 to the height of the two side plates 63. In the same mounting hole 64, the other side of the balance beam 60 is screwed to the limit shaft 62 through the fastening nut 66 and then tightened. When adjustment is required, the limit shaft 62 is installed in the mounting holes 64 of different heights. Yes, when the swing range of the balance beam 60 is too large, the limit shaft 62 can be adjusted downward, and when the swing range is too small, the limit shaft 62 can be adjusted upward. In addition, an anti-collision sleeve 65 is sheathed on the portion of the above-mentioned limiting shaft 62 located between the two side plates 63 to reduce damage caused when the limiting shaft 62 collides with the limiting surface 71 .

The above-mentioned connecting bracket 30 includes two oppositely arranged side walls 32, the balance beam 60 is penetrated between the two side walls 32, and the first rotating shaft 31 is connected between the bottom ends of the two side walls 32, and the connecting rod 70 The other end is pivotally connected to the first rotating shaft 31. In this way, the connecting rod 70 is limited between the two side walls 32. In this way, the balance beam 60 and the connecting rod 70 can be arranged up and down. The balance beam 60 The limit shaft 62 at the swing end can contact and engage with the limit surface 71 of the connecting rod 70 up and down.

The axle 40 is fixed on the leaf spring 50 through a support assembly, and a second rotating shaft 72 is arranged on the supporting assembly, and one end of the connecting rod 70 is pivotally connected to the second rotating shaft 72 . Specifically, the support assembly includes a lower support 42, an upper support 41, and a U-shaped bolt 43. The lower support 42 is located below the axle 40, and the upper support 41 is located above the axle 40 and is clamped between the leaf spring 50 and Between the axles 40, the axle 40 is clamped between the upper support 41 and the lower support 42, the U-shaped bolt 43 is straddled on both sides of the leaf spring 50, and the screw rods at both ends of the U-shaped bolt 43 are formed by the leaf spring 50. Both sides extend downwards and pass through the both sides of the lower support 42 respectively, the screw rods on both sides of the U-shaped bolt 43 pass through the part of the lower support 42 to be screwed with lock nuts, and the lock nuts are tightened to make the U-shaped bolts 43 tighten the leaf spring, upper support 41, axle 40 and lower support 42 downwards, thereby axle 40 and leaf spring 50 are fixed, and the above-mentioned second rotating shaft 72 can be arranged on the upper support 41.

The trailer of the present invention includes the above-mentioned suspension assembly of the trailer, and other structures of the trailer are the same as those of the prior art, and will not be described in detail here.

The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be described in the foregoing embodiments Modifications are made to the recorded technical solutions, or equivalent replacements are made to some of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

The suspension assembly of the trailer is installed under the frame of the trailer, and is characterized in that it includes a bracket, a middle bracket, a connecting bracket, a balance beam, an axle, a leaf spring and a connecting rod;

The bracket, the middle bracket and the connecting bracket are all fixed on the frame of the trailer, and the connecting bracket is located between the middle bracket and the bracket;

The middle part of the balance beam is pivotally connected to the middle support, and one end forms a swing end;

The axle is fixed in the middle of the leaf spring, one end of the leaf spring is connected to the bracket, the other end is connected to the swing end of the balance beam, and the other end of the leaf spring is matched with the swing end of the balance beam to float up and down;

One end of the connecting rod is hinged to the axle, and the other end is hinged to the connecting bracket. The upper surface of the connecting rod forms a limiting surface located below the swinging end. The frame of the trailer is provided with a limiting portion located above the swinging end. Swing between the limiting surface and the limiting part.
The suspension assembly of a trailer according to claim 1, wherein the swing end of the balance beam is fixed with a limit shaft extending along the width direction of the balance beam, and the limit shaft cooperates with the limit surface to limit the swing end downward. degrees of freedom to swing.
The suspension assembly of a trailer according to claim 2, wherein the balance beam comprises two side plates respectively located on both sides thereof, the limit shaft crosses the balance beam and its two ends are respectively fixed on the side plates.
The suspension assembly of the trailer according to claim 3, characterized in that, a downward protruding protrusion is arranged on the side of the side plate located at the bottom of the swing end, and the two ends of the limit shaft are respectively fixed on both sides on the raised part of the board.
The suspension assembly of the trailer according to claim 3, wherein at least two mounting holes arranged along the height direction are arranged on the two side plates, the limit shaft is a bolt, and the bolt crosses the two side plates Two mounting holes at the same height are installed, and are locked on the balance beam by fastening nuts.
The suspension assembly of the trailer according to claim 5, characterized in that, the part of the bolt located between the two side plates is sheathed with an anti-collision sleeve.
The suspension assembly of a trailer according to claim 1, wherein the connecting bracket comprises two oppositely arranged side walls, the balance beam is passed between the two side walls, and the bottom of the two side walls is connected with a first The other end of the connecting rod is pivotally connected to the first rotating shaft.
The suspension assembly of a trailer as claimed in claim 1, wherein the axle is fixed on the leaf spring through a support assembly, a second rotating shaft is arranged on the supporting assembly, and one end of the connecting rod is pivotally connected to the second rotating shaft superior.
The suspension assembly of a trailer according to claim 8, wherein the support assembly comprises a lower support located below the axle, an upper support located above the axle and clamped between the axle and the leaf spring, and U-shaped bolts , the axle is clamped between the lower support and the upper support, the U-shaped bolts are straddled on both sides of the leaf spring, and the two ends extend downwards through the two sides of the lower support respectively, and the two ends of the U-shaped bolts pass through A lock nut is screwed on the part passing through the lower support.
The trailer is characterized by comprising the suspension assembly of the trailer according to any one of claims 1-9.