Suspension assembly for a trailer and trailer

Abstract

The application discloses a suspension assembly of a trailer and the trailer, and relates to the technical field of trailers. The suspension assembly of the trailer comprises a support, a middle support, a connecting support, a balance beam, an axle, a steel plate spring and a connecting rod. The support, the middle support and the connecting support are fixed on a frame of the trailer, and the connecting support is located between the middle support and the support. The middle part of the balance beam is pivotally connected to the middle support, and one end of the balance beam forms a swing end. The axle is fixed in the middle part of the steel plate spring, one end of the steel plate spring is connected to the support, the other end of the steel plate spring is connected to the swing end of the balance beam, and the other end of the steel plate spring is matched with the swing end of the balance beam to float up and down. One end of the connecting rod is hingedly connected to the axle, and the other end of the connecting rod is hingedly connected to the connecting support. The upper surface of the connecting rod forms a limiting surface, the frame of the trailer is provided with a limiting part, and the swing end swings between the limiting surface and the limiting part. The application reduces the swing range of the balance beam, avoids the steel plate spring from being separated from the swing end of the balance beam, shortens the length of the connecting rod, and makes the connecting rod not easy to be deformed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a suspension assembly of a trailer and the trailer. BACKGROUND

[0002] The suspension assembly is the main load-bearing component of the trailer, and the suspension assembly of the existing trailer generally comprises a middle support, a support, a balance beam, a leaf spring, a connecting rod, etc. The middle support and the support are both welded on the frame of the trailer, the balance beam is pivotally connected to the middle support, one end of the leaf spring is connected to the support and the other end is connected to the end of the balance beam and can be up and down floatingly matched with the end of the balance beam, the axle is fixed in the middle of the leaf spring through a support, and a connecting rod is connected between the support and the middle support. The connecting rod is used to prevent the axle from swinging forward and backward. The existing structure is suitable for long wheelbase, but as the wheelbase increases, the distance between the axle and the middle support increases, so the length of the balance beam and the length of the connecting rod need to be increased accordingly. The increase in the length of the balance beam increases the swing range of the end of the balance beam, which makes the position of the leaf spring and the balance beam easy to disengage, causing safety hazards. In addition, the increase in the length of the connecting rod reduces the stability of the connecting rod. Specifically, the increase in the length of the connecting rod makes it easy to deform under stress. In summary, the existing suspension assembly is difficult to meet the requirements of long wheelbase suspension. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a suspension assembly of a trailer which can meet the requirements of long wheelbase trailer and improve the safety of long wheelbase trailer.

[0004] The second purpose of the present application is to provide a trailer.

[0005] To achieve the above-mentioned first purpose, the present application adopts the following technical solutions:

[0006] The suspension assembly of the trailer is installed below the frame of the trailer and comprises a support, a middle support, a connecting support, a balance beam, an axle, a leaf spring and a connecting rod.

[0007] The support, the middle support and the connecting support are fixed on the frame of the trailer, and the connecting support is located between the middle support and the support.

[0008] The middle part of the balance beam is pivotally connected to the middle support, and one end of the balance beam forms a swing end.

[0009] The axle is fixed in the middle of the leaf spring, one end of the leaf spring is connected to the support, and the other end of the leaf spring is connected to the swing end of the balance beam, and the other end of the leaf spring is up and down floatingly matched with the swing end of the balance beam.

[0010] 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 below the swing end, the frame of the trailer is provided with a limiting part above the swing end, and the swing end swings between the limiting surface and the limiting part.

[0011] The swing end of the balance beam is fixed with a limiting shaft extending along the width direction of the balance beam, and the limiting shaft cooperates with the limiting surface to limit the downward swinging degree of the swing end.

[0012] The balance beam includes two side plates respectively located at two sides of the balance beam, and the limiting shaft extends across the balance beam and is fixed at the two side plates.

[0013] One side of the swing end bottom of the two side plates is provided with a protruding part protruding downward, and the two ends of the limiting shaft are fixed on the protruding parts of the two side plates.

[0014] Both of the two side plates are provided with at least two mounting holes arranged in the height direction, the limiting shaft is a bolt, the bolt extends across the two mounting holes at the same height of the two side plates, and is locked on the balance beam through a fastening nut.

[0015] The part of the bolt between the two side plates is sleeved with a collision prevention sleeve.

[0016] The connecting bracket includes two oppositely arranged side walls, the balance beam is arranged 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 pivoted to the first rotating shaft.

[0017] The axle is fixed on the leaf spring through a support assembly, the support assembly is provided with a second rotating shaft, and one end of the connecting rod is pivoted to the second rotating shaft.

[0018] The support assembly includes a lower support below the axle, an upper support above the axle and clamped between the axle and the leaf spring, and a U-shaped bolt, the axle is clamped between the lower support and the upper support, the U-shaped bolt extends across the two sides of the leaf spring, and the two ends of the U-shaped bolt extend downward and pass through the two sides of the lower support, and the parts of the two ends of the U-shaped bolt passing through the lower support are screwed with locking nuts.

[0019] To achieve the above-mentioned purposes, the application adopts the following technical solutions:

[0020] The trailer includes the suspension assembly of the trailer.

[0021] The beneficial effects of the application are as follows:

[0022] In the present application, a connecting bracket is arranged between the bracket and the middle bracket, and the connecting rod is connected between the axle and the connecting bracket, and the maximum angle of the swing of the balance beam is limited by the upper surface of the connecting rod, so as to reduce the swing range of the balance beam and avoid the separation of the leaf spring 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 position of the connecting rod subjected to the pressure of the swing end of the balance beam is far away from the middle part 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 the present application is especially suitable for some trailers with long wheelbase. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the present application;

[0024] Figure 2 is an A-A sectional view of Figure 1 ;

[0025] Figure 3 is a structural schematic view of the balance beam in Figure 1 . DETAILED DESCRIPTION

[0026] In the following, the present application is further described in combination with the drawings and specific embodiments:

[0027] As shown in Figure 1 , 2 , 3, it is a suspension assembly of a trailer of the present application, which comprises 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. The bracket 20, the middle bracket 10 and the connecting bracket 30 are all welded and fixed on the frame of the trailer, and the connecting bracket 30 is located between the bracket 20 and the middle bracket 10, and the connecting bracket 30 is located close to the middle bracket 10. The middle part of the balance beam 60 is pivotally connected to the middle bracket 10, and one end of the balance beam 60 forms a swing end. The axle 40 is fixed to 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 of the leaf spring 50 is threaded into the swing end of the balance beam 60, and the other end of the leaf spring 50 can be up and down floatingly matched with the swing end of the balance beam 60. One end of the connecting rod 70 is hingedly connected to the axle 40, and the other end of the connecting rod 70 is hingedly connected to the connecting bracket 30. The upper surface of the connecting rod 70 forms a limiting surface 71 located below the swing end. A limiting part 80 is arranged on the frame of the trailer and located above the swing end. The limiting part 80 can be a groove steel welded on the frame in a reverse buckle. The swing end swings between the limiting surface 71 and the limiting part 80, and the maximum angle of the swing end up and down is limited by the limiting surface 71 and the limiting part 80, so as to limit the swing range of the balance beam 60 not to be too large.

[0028] In the present application, a connecting bracket is arranged between the support and the middle support, and a connecting rod is connected between the axle and the connecting bracket, the maximum angle of the balance beam swinging downward is defined by the upper surface of the connecting rod, thereby reducing the swing range of the balance beam and avoiding the steel plate spring from being separated from the swinging end of the balance beam, the connecting rod is connected between the axle and the connecting bracket, the length of the connecting rod is shortened, and the position of the connecting rod bearing the pressure from the swinging end of the balance beam is far away from the middle part of the length direction of the connecting rod, so that the connecting rod is not easy to be deformed, the safety of the trailer is improved, and the present application is especially suitable for some long-wheelbase trailers.

[0029] In the preferred embodiment, the present application is provided with a limiting shaft 62 extending along the width direction of the balance beam 60, which is fixed to the balance beam 60 at the swing end of the balance beam 60. When the limiting shaft 62 swings downward with the swing end of the balance beam 60, the limiting shaft 62 contacts the limiting surface 71, and then a limiting mechanism is formed by the cooperation of the limiting shaft 62 and the limiting surface 71 to limit the freedom of the swing end of the balance beam 60 to swing downward, and then limit the maximum angle of the balance beam 60 to swing downward, as long as the other end of the leaf spring 50 does not come off the swing end of the balance beam 60 at the maximum angle. The balance beam 60 includes two side plates 63 respectively located on both sides of the balance beam 60, and the limiting shaft 62 is fixed to the two side plates 63 at both ends after crossing the balance beam 60, so that the part of the limiting shaft 62 between the two side plates 63 forms the part in contact with the limiting surface 71. In order to further reduce the maximum angle of the balance beam 60 to swing downward, a protruding part 61 is provided on one side of the bottom of the swing end of the two side plates 63, and the ends of the limiting shaft 62 are fixed to the protruding parts 61 of the two side plates 63, so that the position of the limiting shaft 62 is as low as possible, the distance between the limiting shaft 62 and the limiting surface 71 is reduced, and the maximum angle of the balance beam 60 to swing downward is further reduced. In addition, in order to increase the scope of application, the height of the above-mentioned limiting shaft 62 can be adjusted, so that it can be adjusted according to the actual installation condition. Specifically, at least two mounting holes 64 arranged in the height direction are provided on each of the two side plates 63, and the two mounting holes 64 of the same height on the two side plates 63 are arranged in pairs. The limiting shaft 62 is a bolt, and the two ends of the limiting shaft 62 are respectively inserted into the two mounting holes 64 of the same height on the two side plates 63, and the limiting shaft 62 is locked and fixed to the balance beam 60 by a fastening nut 66. When assembling, the limiting shaft 62 is inserted into the mounting holes 64 of the same height on the two side plates 63 from one side of the balance beam 60, and then the limiting shaft 62 is screwed with the fastening nut 66 on the other side of the balance beam 60. When adjustment is needed, the limiting shaft 62 is installed in the mounting holes 64 of different heights. When the swing amplitude of the balance beam 60 is too large, the limiting shaft 62 can be adjusted downward, and when the swing amplitude is too small, the limiting shaft 62 can be adjusted upward. In addition, a bumper sleeve 65 is further provided on the part of the limiting shaft 62 between the two side plates 63 to reduce the damage caused by the collision between the limiting shaft 62 and the limiting surface 71.

[0030] The above-mentioned connecting bracket 30 includes two opposite side walls 32, and the balance beam 60 is arranged between the two side walls 32. The first rotating shaft 31 is connected between the bottom ends of the two side walls 32, and the other end of the connecting rod 70 is pivoted to the first rotating shaft 31. In this way, the connecting rod 70 is limited between the two side walls 32, so that the balance beam 60 can be arranged vertically opposite to the connecting rod 70, and the limiting shaft 62 of the swing end of the balance beam 60 can be vertically opposite to the limiting surface 71 of the connecting rod 70.

[0031] The axle 40 is fixed on the leaf spring 50 through a support assembly, and a second pivot shaft 72 is arranged on the support assembly, and one end of the connecting rod 70 is pivotally connected to the second pivot shaft 72. Specifically, the support assembly comprises a lower support 42, an upper support 41 and a U-shaped bolt 43, the lower support 42 is located below the axle 40, the upper support 41 is located above the axle 40 and is clamped between the leaf spring 50 and the axle 40, the axle 40 is clamped between the upper support 41 and the lower support 42, the U-shaped bolt 43 is arranged on both sides of the leaf spring 50, and the screw rods at both ends of the U-shaped bolt 43 extend downward from both sides of the leaf spring 50 and then pass through both sides of the lower support 42, respectively, lock nuts are screwed on the portions of the screw rods at both sides of the U-shaped bolt 43 which pass through the lower support 42, the lock nuts are tightened to pull the leaf spring, the upper support 41, the axle 40 and the lower support 42 downward by the U-shaped bolt 43, so as to fix the axle 40 and the leaf spring 50, and the second pivot shaft 72 can be arranged on the upper support 41.

[0032] The trailer of the present application comprises the suspension assembly of the trailer as described above, and other structures of the trailer are the same as those of the prior art, and thus are not described in detail.

[0033] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently, 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 embodiments of the present application.

Claims

1. A suspension assembly for a trailer, mounted below the trailer frame, characterized in that, Includes brackets, intermediate brackets, connecting brackets, balance beams, axles, leaf springs, and connecting rods; The bracket, the middle bracket, and the connecting bracket are all fixed to the trailer frame, with the connecting bracket located between the middle bracket and the bracket. The middle part of the balance beam is pivotally connected to the central support, and one end of it 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, and the other end is connected to the swing end of the balance beam. The other end of the leaf spring is in a dynamic cooperation with the swing end of the balance beam. 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 swing end. The trailer frame is provided with a limiting part located above the swing end. The swing end swings between the limiting surface and the limiting part. A limiting shaft extending along the width of the balance beam is fixed to the swing end of the balance beam. The limiting shaft cooperates with the limiting surface to limit the degree of freedom of the swing end to swing downward. The balance beam includes two side plates located on both sides of it, and the limiting shaft passes through the balance beam and its two ends are fixed to the two side plates respectively. The two side plates are provided with downward protrusions on one side of the bottom of the swing end, and the two ends of the limiting shaft are respectively fixed on the protrusions of the two side plates. Each of the two side plates is provided with at least two mounting holes arranged along the height direction. The limiting shaft is a bolt, which passes through the two mounting holes at the same height on both side plates and is locked to the balance beam by fastening nuts. The connecting bracket includes two opposing side walls, a balance beam passes between the two side walls, a first pivot is connected between the bottom of the two side walls, and the other end of the connecting rod is pivotally connected to the first pivot.

2. The suspension assembly of the trailer as described in claim 1, characterized in that, A protective sleeve is fitted around the portion of the bolt located between the two side plates.

3. The suspension assembly of the trailer as described in claim 1, characterized in that, The axle is fixed to the leaf spring by a support assembly, and a second pivot is provided on the support assembly. One end of the connecting rod is pivotally connected to the second pivot.

4. The suspension assembly of the trailer as described in claim 3, characterized in that, 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, and a U-bolt. The axle is clamped between the lower support and the upper support. The U-bolt spans both sides of the leaf spring, and its two ends extend downward through both sides of the lower support. Locking nuts are screwed onto the portions of the U-bolt that pass through the lower support.

5. A trailer, characterized in that, Includes the suspension assembly of the trailer as described in any one of claims 1-4.

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