Lifting mechanism of air suspension and air suspension

Abstract

The utility model discloses a lifting mechanism of an air suspension and the air suspension. The lifting mechanism comprises a support, a guide arm, a pivot bolt, a swing support and an air bag. One end of the guide arm is pivoted on the bracket through a pivot bolt, and two ends of the pivot bolt respectively form a pivoting part; the swing support comprises two swing arms, each swing arm comprises a first end, a second end and a rotating part, the rotating parts of the two swing arms are pivoted to the two pivoting parts respectively, the first ends of the two swing arms are detachably fixed together and form a mounting face, the two ends of the air bag are connected to the mounting face and the trailer frame respectively, and a supporting base is arranged between the second ends of the two swing arms. The supporting seat is supported below the guide arm so as to push the guide arm upwards when the second ends of the two swing arms swing upwards, and the supporting seat is detachably connected with the swing arms. According to the utility model, the lifting mechanism can be quickly assembled on the air suspension without disassembling a guide arm and a pivot bolt and without professional operators and operation tools.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle suspension, in particular to an air suspension lifting mechanism and the air suspension. Background Art

[0002] Some trailers are usually equipped with a lifting mechanism for their air suspension. When the trailer is fully loaded, the middle axle of the trailer is in a low position. When the trailer is driving, the tires on the middle axle contact the ground to provide support. When the trailer is unloaded, in order to achieve fuel economy, the lifting mechanism is usually used to lift the middle axle to a high position. The tires on the middle axle are suspended in the air, reducing the friction resistance between the trailer and the ground during driving.

[0003] When assembling the current lifting mechanism, it needs to be assembled together with the guide arm of the air suspension. The assembly process is relatively complicated. In particular, during assembly, it is necessary to remove the pivot bolt that pivots the guide arm to the suspension bracket. The pivot bolt often has a wheelbase adjustment function. When the pivot bolt is removed and reassembled, it is usually necessary to readjust the pivot bolt. In other words, when assembling the lifting mechanism, more professional operators and operating tools are often required, which makes the operation difficult during the installation of the lifting mechanism. Utility Model Content

[0004] In view of the shortcomings of the prior art, the first object of the present invention is to provide an air suspension lifting mechanism that is easy to assemble.

[0005] The second purpose of this utility model is to provide an air suspension

[0006] In order to achieve the above purpose one, the utility model adopts the following technical solutions:

[0007] The lifting mechanism of the air suspension includes a bracket fixed to the trailer frame, a guide arm, a pivot bolt, a swing bracket, and an air bag;

[0008] One end of the guide arm is pivotally connected to the bracket through a pivot bolt, and both ends of the pivot bolt protrude from two side surfaces of the bracket to form a pivot portion;

[0009] The swing bracket includes two swing arms respectively placed on both sides of the bracket, the swing arms include a first end, a second end opposite to the first end, and a rotating part located between the first end and the second end, the rotating parts of the two swing arms are respectively pivoted on the two pivot parts, the first ends of the two swing arms are fixed together in a detachable manner to form a mounting surface, the two ends of the airbag are respectively connected to the mounting surface and the trailer frame, a support seat is provided between the second ends of the two swing arms, the support seat is supported under the guide arm to push the guide arm upward when the second ends of the two swing arms swing upward, and the support seat is detachably connected to the swing arm.

[0010] An upwardly protruding extension arm is provided in the middle of the swing arm, the rotating portion is a shaft hole provided on the extension arm, and the pivoting portion is passed through the shaft hole so that the extension arm and the pivoting portion rotate in conjunction.

[0011] The nut and cap of the pivot bolt form a pivot joint respectively. Wear-resistant rings are respectively sleeved on the nut and cap of the pivot bolt. The two wear-resistant rings are respectively connected to the shaft holes of the two extension arms.

[0012] The extension arm is plate-shaped and includes a first wall panel and a second wall panel. The first wall panel is formed by bending the middle part of the swing arm toward the bracket, and the second wall panel is formed by bending the inner side edge of the first wall panel upward. The axis hole is opened on the second wall panel, and a reinforcement plate welded and fixed to the first wall panel and the swing arm is provided on the inner side of the connection between the first wall panel and the swing arm.

[0013] The extension arm and the swing arm are integrally formed; or the extension arm is fixedly connected to the middle part of the swing arm in a detachable manner.

[0014] The first ends of the two swing arms are provided with connecting plates extending toward each other, and a support plate is provided on the two connecting plates. The support plate is fixed to the two connecting plates in a detachable manner, and the upper surface of the support plate forms a mounting surface.

[0015] The first ends of the two swing arms are provided with connecting plates extending toward each other. The two connecting plates are fixed together in a detachable manner. The upper surfaces of the two connecting plates are flush so that the upper surfaces of the two connecting plates jointly form a mounting surface.

[0016] The distance between the two swing arms gradually decreases from the middle to both sides.

[0017] The second end of the swing arm is provided with a vertically extending mounting wall. The mounting walls at the second ends of the two swing arms are arranged opposite to each other. The support seat is placed between the two mounting walls, and the support seat is fixedly matched with the mounting wall in an up and down adjustable manner.

[0018] The mounting wall is provided with a plurality of adjustment holes arranged in the height direction. The support seat comprises a connecting screw and a seat sleeve sleeved on the outside of the connecting screw. The connecting screw crosses the adjustment holes of the same height on the two mounting walls.

[0019] A support sleeve is arranged between the middle parts of the two swing arms, and a fastening nut is respectively passed through the outer sides of the two swing arms, and the two fastening nuts are respectively screwed on the two end parts of the support sleeve.

[0020] In order to achieve the above-mentioned second purpose, the present invention adopts the following technical solutions:

[0021] Air suspension, including the above-mentioned air suspension lifting mechanism.

[0022] The beneficial effects of the present invention are:

[0023] When assembling the lifting mechanism of the present invention, the two swing arms are placed on either side of the bracket, with the rotating portions of the two swing arms connected to the pivoting portions at both ends of the pivot bolt. A support base is then installed between the second ends of the two swing arms. Finally, the first ends of the two swing arms are assembled together, and the lower end of the airbag is connected to the mounting surface formed by the first ends of the two swing arms. The lifting mechanism can then be installed on the air suspension. Because the swing bracket is composed of two separate swing arms, the two swing arms can engage with the bracket from either side during installation. Therefore, the lifting mechanism can be quickly assembled on the air suspension without removing the guide arms and pivot bolts, and without the need for specialized operators or tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model;

[0025] Figure 2 This is an assembly diagram of the first embodiment of the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the second embodiment of the present utility model;

[0027] Figure 4 This is a side view of the second embodiment of the present utility model;

[0028] Figure 5 for Figure 4 AA cross-sectional view;

[0029] Figure 6 for Figure 4 BB cross-sectional view. DETAILED DESCRIPTION

[0030] Below, in conjunction with the accompanying drawings and specific embodiments, the utility model is further described:

[0031] like Figure 1 、 2The figure shows an air suspension lifting mechanism of the first embodiment of the present invention, which includes a bracket 10, a guide arm 20, a pivot bolt 30, a swing bracket 400, and an airbag 50. The top of the bracket 10 is welded and fixed to the trailer frame, and one end of the guide arm 20 is pivotally connected to the bracket 10 by the pivot bolt 30, so that the guide arm 20 can swing up and down relative to the trailer frame. An air spring 90 is arranged between the other end of the guide arm 20 and the trailer frame. The air spring 90 is used to buffer the up and down swinging of the guide arm 20 to buffer the trailer axle installed on the guide arm 20. The bracket 10 is a U-shaped structure formed by bending or welding a plate. One end of the guide arm 20 is embedded between the two wall plates of the bracket 10, and the pivot bolt 30 is passed through one end of the guide arm 20 and the two wall plates of the bracket 10. The two ends of the pivot bolt 30 protrude from the outer side surfaces of the two wall plates of the bracket 20 respectively. Therefore, a pivot connection portion is formed at the part of the pivot bolt 30 protruding from the two side surfaces of the bracket 20. The swing bracket 400 includes two swing arms 40 respectively provided on both sides of the bracket 10. The two swing arms 40 are arranged opposite to each other. Specifically, the swing arm 40 includes a first end 401, a second end 402 opposite to the first end 401, and a rotating portion located between the first end 401 and the second end 402. The rotating portions of the two swing arms 40 are respectively pivotally connected to the pivoting portions at both ends of the pivot bolt 30; the first ends 401 of the two swing arms 40 are fixed together in a detachable manner, and after the first ends 401 of the two swing arms 40 are fixed together, A mounting surface is formed, the lower end of the airbag 50 is connected to the mounting surface, and the upper end is connected to the trailer frame; a support seat 60 is provided between the second ends 402 of the two swing arms 40, the support seat 60 is supported below the guide arm 20, and the support seat 60 and the two swing arms 40 are detachably connected together; the support seat 60 can swing around the pivot bolt 30 along with the swing bracket 400, and when the second ends 402 of the two swing arms 40 swing upward, the support seat 60 is driven to move upward to push the guide arm 20 upward.

[0032] When the vehicle is unloaded, the airbag 50 inflates, while the air spring 90 of the air suspension deflates. The two swing arms 40 drive the support base 60 to move up and down, lifting the guide arm 20 upward, moving the trailer axle upward and clearing the ground at the end of the trailer axle. When the vehicle is fully loaded, the airbag 50 deflates, the air spring 90 of the air suspension inflates, and the support base 60 moves downward to clear the guide arm 20, returning the air suspension to normal operation.

[0033] When assembling the lifting mechanism of the present invention, the two swing arms 40 are placed on either side of the bracket 40, with the rotating portions of the two swing arms 40 connected to the pivotal portions at both ends of the pivot bolt 30. The support base 60 is then installed between the second ends 402 of the two swing arms 40. Finally, the first ends 401 of the two swing arms 40 are assembled together, and the lower end of the airbag 50 is connected to the mounting surface formed by the first ends 401 of the two swing arms 40. The lifting mechanism can then be installed on the air suspension. Because the swing bracket 400 is composed of two separate swing arms 40, during installation, the two swing arms 40 can engage with the bracket 10 from either side. Therefore, the lifting mechanism can be quickly assembled on the air suspension without disassembling the guide arm 20 and pivot bolt 30, and without the need for specialized operators or tools.

[0034] An upwardly projecting extension arm 41 is provided in the middle of the swing arm 40. The pivoting portion is a shaft hole 411 provided in the extension arm 41. A pivoting portion is inserted into the shaft hole 411, allowing the extension arm 41 to pivotally engage with the pivoting portion. The provision of the extension arm 41 lowers the installation height of the swing arm 40, allowing the first end 401 of the swing arm 40 to be positioned lower to provide more space for the airbag 50. It also allows the second end 402 of the swing arm 40 to be positioned lower to allow the support base 60 to be positioned below the guide arm 20. The extension arm 41 can be removably secured to the swing arm 40 via bolts, or it can be removably secured to the swing arm 40 via other connection methods.

[0035] The nut of the pivot bolt 30 is located on the outside of one of the wall panels of the bracket 10, and the nut is located on the outside of the other wall panel of the bracket 10, that is, the nut and nut of the pivot bolt 30 are respectively formed into a pivot part, and the nut and nut of the pivot bolt 30 can be respectively embedded in the shaft holes 411 on the two swing arms 40.

[0036] The first ends 401 of the two swing arms 40 are respectively provided with a connecting plate 42 extending toward each other. The two connecting plates 42 are fixed together in a detachable manner. A bending portion is provided on one of the connecting plates 42 so that the two connecting plates 42 can be arranged in an overlapping manner up and down. After the two connecting plates 42 are connected together, the upper surfaces of the two connecting plates 42 form a flat mounting surface to facilitate the installation of the lower end of the airbag 50.

[0037] Figure 3The figure shows a lifting mechanism of an air suspension according to a second embodiment of the present invention. The lifting mechanism of the second embodiment is substantially the same as that of the first embodiment, except that the swing bracket of the second embodiment includes two opposing swing arms 70. An integrally formed extension arm 71 is provided in the middle of the swing arm 70. The extension arm 71 protrudes upward and is provided with an axial hole so that the extension arm 71 can be sleeved on the nut or cap of the pivot bolt 30, so that the swing arm 70 is rotatably connected to the end of the pivot bolt 30. To prevent the pivot bolt 30 from being worn, a wear-resistant ring 74 can be sleeved on the nut and cap of the pivot bolt 30, respectively, and two wear-resistant rings 73 are respectively connected to the axial holes of the two extension arms 71.

[0038] The extension arm 71 is integrally formed on the swing arm 70. The extension arm 71 and the swing arm 70 are plate-shaped structures, which are formed by bending the plate. The extension arm 71 includes a first wall panel 711 and a second wall panel 712. The first wall panel 711 is formed by bending the middle part of the swing arm 70 toward the bracket 10, and the second wall panel 712 is formed by bending the inner side edge of the first wall panel 711 upward. The axis hole is opened on the second wall panel 712, and a reinforcing plate 76 is provided on the inner side of the connection between the first wall panel 711 and the swing arm 770. The reinforcing plate 76 is welded and fixed to the first wall panel 711 and the swing arm 70, so that the connection between the extension arm 71 and the swing arm 70 has higher strength, so that the swing arm 70 can provide more stable support for the airbag 50 and the support seat 60.

[0039] A connecting plate 72 extending toward each other is respectively provided at the first end 701 of the two swing arms 70. The two connecting plates 72 are arranged flush with each other, and a support plate 75 is provided on the two connecting plates 72. The support plate 75 is fixed to the two connecting plates 72 in a detachable manner. The upper surface of the support plate 75 forms a mounting surface for connecting to the lower end portion of the airbag 50. The connecting plate 72 enables the first ends 701 of the two swing arms 70 to cooperate in a detachable manner, thereby facilitating the installation of the two swing arms 70 from both sides of the bracket 10 respectively.

[0040] In order to make the distance between the two swing arms 70 larger to adapt to the width of the bracket 10, while ensuring that the airbag 50 can be installed between the first ends 701 of the two swing arms 70 and the support seat 60 can be installed between the second ends 702 of the two swing arms 70, the distance between the two swing arms 70 gradually decreases from the middle to both sides. Specifically, a first inclined section 703 is provided on the swing arm 70, and the first inclined section 703 is located between the middle part and the first end 701 of the swing arm 70, and is inclined toward the inside. A second inclined section 704 is provided on the swing arm 70, and is located between the middle part and the second end 702 of the swing arm 70, and the second inclined section 704 is inclined toward the inside. Therefore, the first inclined section 703 and the second inclined section 704 are provided on both swing arms 70, so that the distance between the two swing arms 70 gradually decreases from the middle to both sides.

[0041] A vertically extending mounting wall 73 is provided at the second end 702 of the swing arm 70. The mounting walls 73 on the two swing arms 70 are arranged opposite each other. The support base 60 is placed on the two mounting walls 73. The support base 60 is detachably connected to the two mounting walls 73 and fixedly engaged with the mounting walls 73 in a vertically adjustable manner. The vertically adjustable support base 60 allows the height of the support base 60 to be adaptively adjusted according to the height of the guide arm during installation of the lifting mechanism. The mounting wall 73 is provided with a plurality of adjustment holes 732 arranged along the height direction. The support base 60 includes a connecting screw 62 and a seat sleeve 61. The connecting screw 62 passes through two adjustment holes 732 at the same height on the two mounting walls 73 to be detachably fixed to the two mounting walls 73. The seat sleeve 61 is mounted on the connecting screw 62. When the height of the seat sleeve 61 needs to be adjusted, the connecting screw 62 is passed through the adjustment holes 732 at different heights on the two mounting walls 73.

[0042] In addition, in order to make the swing bracket more stable, a support sleeve 77 is provided between the middle parts of the two swing arms 70. The two ends of the support sleeve 77 respectively press against the inner sides of the two swing arms 70. The outer sides of the two swing arms 70 are respectively connected with a fastening nut 771. The two fastening nuts 771 pass through the two swing arms 70 respectively and are screwed to the two ends of the support sleeve 77.

[0043] The air suspension of the present invention includes the lifting mechanism of the air suspension. Other structures of the air suspension are the same as those in the prior art and will not be described in detail here.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. The lifting mechanism of the air suspension is characterized by: It includes brackets, guide arms, pivot bolts, swing brackets, and air bags fixed to the trailer frame; One end of the guide arm is pivotally connected to the bracket through a pivot bolt, and both ends of the pivot bolt protrude from two side surfaces of the bracket to form a pivot portion; The swing bracket includes two swing arms respectively placed on both sides of the bracket, the swing arms include a first end, a second end opposite to the first end, and a rotating part located between the first end and the second end, the rotating parts of the two swing arms are respectively pivoted on the two pivot parts, the first ends of the two swing arms are fixed together in a detachable manner to form a mounting surface, the two ends of the airbag are respectively connected to the mounting surface and the trailer frame, a support seat is provided between the second ends of the two swing arms, the support seat is supported under the guide arm to push the guide arm upward when the second ends of the two swing arms swing upward, and the support seat is detachably connected to the swing arm.

2. The air suspension lifting mechanism according to claim 1, characterized in that: An upwardly protruding extension arm is provided in the middle of the swing arm, the rotating portion is a shaft hole provided on the extension arm, and the pivoting portion is passed through the shaft hole so that the extension arm and the pivoting portion rotate in conjunction.

3. The air suspension lifting mechanism according to claim 2, characterized in that: The nut and cap of the pivot bolt form a pivot joint respectively. Wear-resistant rings are respectively sleeved on the nut and cap of the pivot bolt. The two wear-resistant rings are respectively connected to the shaft holes of the two extension arms.

4. The lifting mechanism of the air suspension according to claim 2, characterized in that: The extension arm is plate-shaped and includes a first wall panel and a second wall panel. The first wall panel is formed by bending the middle part of the swing arm toward the bracket, and the second wall panel is formed by bending the inner side edge of the first wall panel upward. The axis hole is opened on the second wall panel, and a reinforcement plate welded and fixed to the first wall panel and the swing arm is provided on the inner side of the connection between the first wall panel and the swing arm.

5. The lifting mechanism of the air suspension according to claim 2, characterized in that: The extension arm and the swing arm are integrally formed; or the extension arm is fixedly connected to the middle part of the swing arm in a detachable manner.

6. The lifting mechanism of the air suspension according to claim 1, characterized in that: The first ends of the two swing arms are provided with connecting plates extending toward each other, and a support plate is provided on the two connecting plates. The support plate is fixed to the two connecting plates in a detachable manner, and the upper surface of the support plate forms a mounting surface.

7. The lifting mechanism of the air suspension according to claim 1, characterized in that: The first ends of the two swing arms are provided with connecting plates extending toward each other. The two connecting plates are fixed together in a detachable manner. The upper surfaces of the two connecting plates are flush so that the upper surfaces of the two connecting plates jointly form a mounting surface.

8. The lifting mechanism of air suspension according to claim 1, characterized in that: The distance between the two swing arms gradually decreases from the middle to both sides.

9. The air suspension lifting mechanism according to claim 1, wherein: The second end of the swing arm is provided with a vertically extending mounting wall. The mounting walls at the second ends of the two swing arms are arranged opposite to each other. The support seat is placed between the two mounting walls, and the support seat is fixedly matched with the mounting wall in an up and down adjustable manner.

10. The lifting mechanism of the air suspension according to claim 9, characterized in that: The mounting wall is provided with a plurality of adjustment holes arranged in the height direction. The support seat comprises a connecting screw and a seat sleeve sleeved on the outside of the connecting screw. The connecting screw crosses the adjustment holes of the same height on the two mounting walls.

11. The lifting mechanism of air suspension according to claim 1, characterized in that: A support sleeve is arranged between the middle parts of the two swing arms, and a fastening nut is respectively passed through the outer sides of the two swing arms, and the two fastening nuts are respectively screwed on the two end parts of the support sleeve.

12. Air suspension, characterized in that, A lifting mechanism comprising the air suspension according to any one of claims 1 to 11.

Images