Novel trailer suspension arm and processing technology thereof

Abstract

The invention relates to the technical field of novel trailer suspension arms and machining technologies thereof, and discloses a novel trailer suspension arm and a machining technology thereof.The novel trailer suspension arm comprises an axle tube, and the outer side of the axle tube is fixedly connected with two upper bearing bushes located above the axle tube; the outer side of the axle tube is fixedly connected with two lower bearing bushes which are fixedly connected with the bottoms of the two upper bearing bushes correspondingly. The novel trailer suspension arm and the processing technology thereof have the advantages of being firm in fixation, high in safety and the like, and solve the problems that due to the fact that an existing trailer is large in loading capacity, the suspension arm is mostly directly and fixedly connected with an axle tube, and the suspension arm is mostly fixedly connected with the axle tube through a bolt or a U-shaped fixing ring in a clamped mode; however, the problem that the driving safety of the trailer is easily affected due to abnormal sound or loosening of the suspension arm caused by the conditions of thread slipping, thread falling and the like due to vehicle bumping and the like when the suspension arm is fixedly connected to the heavy-load trailer in a threaded mode is solved.

Description

Technical Field

[0001] The invention relates to the technical field of a novel trailer suspension arm and a processing technology thereof, and in particular to a novel trailer suspension arm and a processing technology thereof. Background Art

[0002] The suspension arm is also called the triangular arm or the lower arm. Its function is to balance and support. When the car is driving on an uneven road, the tire will swing up and down, which is achieved by the up and down swinging of the triangular arm. The tire is installed on the axle head, and the axle head is connected to the triangular arm through a ball head. This is a commonly used suspension method for small vehicles.

[0003] Due to the large load capacity of existing trailers, the installation method of the suspension arm is mostly to directly fix it with the axle tube. The fixing connection method mostly adopts bolts or U-shaped fixing rings for clamping and fixing. However, the fixing method is still threaded fixing. When the threaded fixing connection is used on a heavy-loaded trailer, it is often encountered that the thread is slipped or stripped due to vehicle bumps and other reasons, causing the suspension arm to make abnormal noise or loosen, which is easy to affect the driving safety of the trailer. Therefore, a new trailer suspension arm and its processing technology are proposed to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a novel trailer suspension arm and a processing technology thereof, which have the advantages of firm fixation and high safety, and solves the problem that the existing trailer has a large load capacity, so the suspension arm is mostly installed by directly fixing it with the axle tube, and the fixing connection method mostly adopts bolts or U-shaped fixing rings for clamping and fixing, but the fixing method is still threaded fixing, and the threaded fixed connection when used on a heavy-loaded trailer often encounters problems such as thread slippage and de-threading due to vehicle bumps and other reasons, which causes the suspension arm to make abnormal noises or become loose, easily affecting the driving safety of the trailer.

[0006] (II) Technical solution

[0007] The technical solution of the present invention to solve the above technical problems is as follows: a new type of trailer suspension arm, including an axle tube, the outer side of the axle tube is fixedly connected with two upper bearing shells located above the axle tube, the outer side of the axle tube is fixedly connected with two lower bearing shells respectively fixedly connected to the bottom of two upper bearing shells, the outer sides of the two upper bearing shells are fixedly connected with a first cantilever upper shell, the backs of the two lower bearing shells are fixedly connected with a first cantilever lower shell fixedly connected to the bottom of the first cantilever upper shell on the same side, the fronts of the two first cantilever upper shells are fixedly connected with a second cantilever upper shell, the fronts of the two lower bearing shells are fixedly connected with a second cantilever lower shell fixedly connected to the bottom of the first cantilever upper shell and the second cantilever upper shell on the same side, sleeves are fixedly connected between the two second cantilever lower shells and the second cantilever upper shell on the same side, and the same connecting pipe is fixedly connected between the two first cantilever upper shells and the first cantilever lower shell on the same side;

[0008] The two upper bearings and the two lower bearings are provided with notches on opposite sides. The left and right ends of the notches of the two upper bearings are arranged in arcs with a radius of 20 mm. The center distance between the two arcs is 80 mm. The radius of the two upper bearings and the two lower bearings is 63.5 mm. A welding groove with a spacing of 3 mm is reserved between the upper bearings and the lower bearings.

[0009] The left and right ends of the notches of the two lower bearing shells are arranged in the form of arcs with a radius of 45 mm, and the distance between the centers of the two arcs is 30 mm.

[0010] The beneficial effect of the present invention is that during use, the cantilever is fixed to the outer side of the axle tube by means of welded upper and lower bearing shells, and then the cantilever is connected to the trailer chassis, thereby reducing the use of bolts and reducing the shear force of the cantilever on the bolts during the shock absorption process.

[0011] The novel trailer suspension arm and the processing technology thereof have the advantages of firm fixation and high safety.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the two upper bearings are arranged symmetrically on the left and right, and the interior of the axle tube is provided with a trailer wheel hub assembly with two ends extending to the left and right sides of the axle tube respectively.

[0014] Furthermore, a shock-absorbing piston mounting hole is provided on the top of the two second cantilever upper shells, and four shock-absorbing piston fixing holes are provided on the top of the two second cantilever upper shells, which are distributed around the outside of the shock-absorbing piston mounting hole, and the mounting surfaces of the two second cantilever upper shells are arranged in a fan shape.

[0015] The beneficial effect of adopting the above further scheme is that the fan-shaped mounting surface of the second cantilever upper shell can increase the mounting area of ​​the second cantilever upper shell and the shock-absorbing piston when they are installed, so that the impact force after installation can be better transmitted through the second cantilever upper shell to the shock-absorbing piston for shock absorption, thereby improving the shock absorption effect.

[0016] Furthermore, U-shaped grooves are provided at the tops of the two second cantilever lower shells, between the first cantilever upper shell and the second cantilever upper shell, and the three U-shaped grooves on the same side are adapted to the sleeve.

[0017] The beneficial effect of adopting the above further solution is that the preset U-shaped groove makes it easy to insert the sleeve between the second cantilever lower shell, the first cantilever upper shell and the second cantilever upper shell for welding during welding, which can prevent the sleeve from shifting due to inability to fix during welding.

[0018] Furthermore, the two second cantilever lower shells are both arranged to be tilted upward, and the left and right sides of the two first cantilever upper shells and the two first cantilever lower shells are both arranged to be tilted toward one side opposite to the other.

[0019] The beneficial effect of adopting the above further solution is that the lower shell of the second cantilever is arranged to be inclined upward, which can provide a certain support to the upper shell of the second cantilever, reduce the vertical pressure of the lower bearing shell through the triangular force, and thus improve the structural strength.

[0020] Furthermore, the two first cantilever upper shells, the first cantilever lower shell, the second cantilever upper shell and the second cantilever lower shell are all prepared by stamping process, and the cross-sections of the two first cantilever upper shells, the first cantilever lower shell, the second cantilever upper shell and the second cantilever lower shell are all U-shaped.

[0021] The beneficial effect of adopting the above further solution is that the stamping production and processing efficiency is high, and the U-shaped cross section can further enhance the structural strength and increase the service life.

[0022] A new processing technology for a trailer suspension arm includes the following steps:

[0023] S1: Clamp and fix the axle tube at the working position of the external automatic welding machine, and align the parts of the two trailer wheel hub assemblies to be welded with the two ends of the axle tube respectively, and operate the automatic welding machine to calibrate the center of the two trailer wheel hub assemblies with the axle tube. After the center of the circle is calibrated, start the automatic welding machine to weld the two trailer wheel hub assemblies with the axle tube through the automatic welding machine;

[0024] S2: hoist the welded axle tube and trailer wheel hub assembly onto the welding workbench, rotate the axle tube 25 degrees and fix it by a fixing device, buckle the two upper bearing shells in sequence, adjust the spacing between the two upper bearing shells so that the distances to the stop bottom plate are equal, and weld the two upper bearing shells to the axle tube by submerged arc welding at the contact parts of the two upper bearing shells and the axle tube;

[0025] S3: Use a fixing device to rotate the axle tube 180 degrees and fix it again, then snap the two lower bearings onto the two upper bearings in turn, adjust the two lower bearings to align with the upper bearings on the same side, and weld the two lower bearings to the axle tube by submerged arc welding at the contact parts between the two lower bearings and the axle tube, and then weld the adjacent upper and lower bearings through the reserved welding grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the assembly structure of the trailer wheel hub assembly and the axle tube of the present invention;

[0028] Figure 3 It is a top view of the connection structure between the second cantilever upper shell and the first cantilever upper shell of the present invention;

[0029] Figure 4 It is a side view of the connection structure between the upper bearing and the lower bearing of the present invention;

[0030] Figure 5 It is a side view of the connection structure between the second cantilever upper shell and the second cantilever lower shell of the present invention.

[0031] In the figure: 1, axle tube; 2, upper bearing shell; 3, lower bearing shell; 4, first cantilever upper shell; 5, first cantilever lower shell; 6, second cantilever upper shell; 7, second cantilever lower shell; 8, sleeve; 9, connecting pipe; 10, shock absorber piston mounting hole; 11, shock absorber piston fixing hole; 12, trailer wheel hub assembly. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the embodiment, Figure 1-5Provided is a novel trailer suspension arm and a processing technology thereof, the invention comprises an axle tube 1, the outer side of the axle tube 1 is fixedly connected with two upper bearing shells 2 located above the axle tube 1, the outer side of the axle tube 1 is fixedly connected with two lower bearing shells 3 respectively fixedly connected to the bottom of the two upper bearing shells 2, the outer sides of the two upper bearing shells 2 are fixedly connected with a first cantilever upper shell 4, the backs of the two lower bearing shells 3 are fixedly connected with a first cantilever lower shell 5 fixedly connected to the bottom of the first cantilever upper shell 4 on the same side, the fronts of the two first cantilever upper shells 4 are fixedly connected with a second cantilever upper shell 6, the fronts of the two lower bearing shells 3 are fixedly connected with a second cantilever lower shell 7 fixedly connected to the bottom of the first cantilever upper shell 4 and the second cantilever upper shell 6 on the same side, sleeves 8 are fixedly connected between the two second cantilever lower shells 7 and the second cantilever upper shell 6 on the same side, and the same connecting pipe 9 is fixedly connected between the two first cantilever upper shells 4 and the first cantilever lower shell 5 on the same side;

[0034] The two upper bearings 2 and the two lower bearings 3 are provided with notches on opposite sides. The left and right ends of the notches of the two upper bearings 2 are arranged in arcs with a radius of 20 mm. The center distance between the two arcs is 80 mm. The radii of the two upper bearings 2 and the two lower bearings 3 are both 63.5 mm. A welding groove with a spacing of 3 mm is reserved between the upper bearings 2 and the lower bearings 3.

[0035] The left and right ends of the notches of the two lower bearing shells 3 are arranged in arcs with a radius of 45 mm, and the center distance between the two arcs is 30 mm;

[0036] The two upper bearing shells 2 are arranged symmetrically, and the interior of the axle tube 1 is provided with a trailer wheel hub assembly 12 with two ends extending to the left and right sides of the axle tube 1 respectively;

[0037] The tops of the two second cantilever upper shells are each provided with a damping piston mounting hole, and the tops of the two second cantilever upper shells are each provided with four damping piston fixing holes which are distributed around the outer sides of the damping piston mounting holes, and the mounting surfaces of the two second cantilever upper shells are arranged in a fan shape;

[0038] The fan-shaped mounting surface of the second cantilever upper shell can increase the mounting area of ​​the second cantilever upper shell and the shock absorbing piston when they are mounted, so that the impact force after the mounting can be better transmitted to the shock absorbing piston through the second cantilever upper shell for shock absorption, thereby improving the shock absorption effect;

[0039] U-shaped grooves are provided on the tops of the two second cantilever lower shells, between the first cantilever upper shell and the second cantilever upper shell, and the three U-shaped grooves on the same side are adapted to the sleeves;

[0040] The preset U-shaped groove facilitates the sleeve to be inserted between the second cantilever lower shell, the first cantilever upper shell and the second cantilever upper shell for welding, which can prevent the sleeve from shifting due to inability to fix during welding;

[0041] The two second cantilever lower shells 7 are both inclined upwards, and the left and right sides of the two first cantilever upper shells 4 and the two first cantilever lower shells 5 are both inclined toward one side;

[0042] The lower shell of the second cantilever is arranged to be inclined upward, which can provide a certain support to the upper shell of the second cantilever, and reduce the vertical pressure of the lower bearing shell through the triangular force, thereby improving the structural strength;

[0043] The two first cantilever upper shells, the first cantilever lower shell, the second cantilever upper shell and the second cantilever lower shell are all prepared by a stamping process, and the cross sections of the two first cantilever upper shells, the first cantilever lower shell, the second cantilever upper shell and the second cantilever lower shell are all arranged in a U shape;

[0044] The stamping production process is highly efficient, and the U-shaped cross section can further enhance the structural strength and improve the service life;

[0045] A new processing technology for a trailer suspension arm includes the following steps:

[0046] S1: Clamp and fix the axle tube 1 at the working position of the automatic welding machine outside, and align the parts of the two trailer wheel hub assemblies 12 to be welded with the two ends of the axle tube 1 respectively, and operate the automatic welding machine to calibrate the center of the two trailer wheel hub assemblies 12 and the axle tube 1. After the center of the circle is calibrated, start the automatic welding machine to weld the two trailer wheel hub assemblies 12 and the axle tube 1 through the automatic welding machine;

[0047] S2: hoisting the welded axle tube 1 and trailer wheel hub assembly 12 to a welding workbench, rotating the axle tube 1 by 25 degrees and fixing it by a fixing device, sequentially buckling the two upper bearing shells 2, adjusting the spacing between the two upper bearing shells 2 so that the distances to the stop bottom plate are equal, and welding the two upper bearing shells 2 to the axle tube 1 by submerged arc welding at the contacting parts of the two upper bearing shells 2 and the axle tube 1;

[0048] S3: Rotate the axle tube 1 180 degrees by a fixing device and fix it again, then snap the two lower bearings 3 onto the two upper bearings 2 in turn, adjust the two lower bearings 3 so that they are aligned with the upper bearings 2 on the same side, and weld the two lower bearings 3 to the axle tube 1 by submerged arc welding at the contact parts of the two lower bearings 3 and the axle tube 1, and then weld the adjacent upper bearings 2 and lower bearings 3 through the reserved welding grooves.

[0049] Working principle:

[0050] First: During use, the cantilever is fixed to the outer side of the axle tube 1 by welding the upper bearing 2 and the lower bearing 3, and then the cantilever is connected to the trailer chassis, so as to reduce the use of bolts and reduce the shear force of the cantilever on the bolts during the shock absorption process;

[0051] Secondly: when the cantilever is subjected to force and shock absorption during vehicle driving, the arc-shaped grooves of the upper bearing 2 and the lower bearing 3 are used to reduce the effect of stress on the bearing weld. At the same time, since the upper and lower sides of the bearing are subjected to different forces during vehicle driving, the stress is transmitted to the larger arc-shaped groove of the upper bearing 2 through the smaller arc-shaped groove of the lower bearing 3, thereby realizing stress transfer and making the force between the upper bearing 2 and the lower bearing 3 more uniform, avoiding stress cracks. At the same time, the upward setting of the second cantilever lower shell 7 increases the supporting force of the second cantilever upper shell 6, reduces the pressure on the weld between the second cantilever upper shell 6 and the first cantilever upper shell 4, and realizes the function of supporting the vehicle.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel trailer suspension arm, comprising an axle tube (1), characterized in that: The outer side of the axle tube (1) is fixedly connected to two upper bearing shells (2) located above the axle tube (1); the outer side of the axle tube (1) is fixedly connected to two lower bearing shells (3) respectively fixedly connected to the bottom of the two upper bearing shells (2); the outer sides of the two upper bearing shells (2) are fixedly connected to a first cantilever upper shell (4); the back sides of the two lower bearing shells (3) are fixedly connected to a first cantilever lower shell (5) fixedly connected to the bottom of the first cantilever upper shell (4) on the same side; the two The front side of the first cantilever upper shell (4) is fixedly connected to the second cantilever upper shell (6); the front sides of the two lower bearing shells (3) are fixedly connected to the second cantilever lower shell (7) fixedly connected to the bottom of the first cantilever upper shell (4) and the second cantilever upper shell (6) on the same side; sleeves (8) are fixedly connected between the two second cantilever lower shells (7) and the second cantilever upper shell (6) on the same side; and the same connecting pipe (9) is fixedly connected between the two first cantilever upper shells (4) and the first cantilever lower shell (5) on the same side; The two upper bearings (2) and the two lower bearings (3) are provided with notches on opposite sides, the left and right ends of the notches of the two upper bearings (2) are arranged in the form of arcs with a radius of 20 mm, the center distance between the two arcs is 80 mm, the radius of the two upper bearings (2) and the two lower bearings (3) is 63.5 mm, and a welding groove with a spacing of 3 mm is reserved between the upper bearings (2) and the lower bearings (3); The left and right ends of the notches of the two lower bearing bushes (3) are arranged in the form of arcs with a radius of 45 mm, and the distance between the centers of the two arcs is 30 mm.

2. A novel trailer suspension arm according to claim 1, characterized in that: The two upper bearing shells (2) are arranged symmetrically on the left and right, and the interior of the axle tube (1) is provided with a trailer wheel hub assembly (12) with two ends extending to the left and right sides of the axle tube (1) respectively.

3. The novel trailer suspension arm according to claim 1 is characterized in that: The tops of the two second cantilever upper shells (6) are each provided with a damping piston mounting hole (10); the tops of the two second cantilever upper shells (6) are each provided with four damping piston fixing holes (11) which are distributed around the outside of the damping piston mounting hole (10); and the mounting surfaces of the two second cantilever upper shells (6) are arranged in a fan shape.

4. The novel trailer suspension arm according to claim 1 is characterized in that: U-shaped grooves are provided at the tops of the two second cantilever lower shells (7), between the first cantilever upper shell (4) and the second cantilever upper shell (6), and the three U-shaped grooves on the same side are adapted to the sleeve (8).

5. The novel trailer suspension arm according to claim 1 is characterized in that: The two second cantilever lower shells (7) are both arranged to be inclined upwards, and the left and right sides of the two first cantilever upper shells (4) and the two first cantilever lower shells (5) are both arranged to be inclined towards one side opposite to the other.

6. The novel trailer suspension arm according to claim 1 is characterized by: The two first cantilever upper shells (4), the first cantilever lower shell (5), the second cantilever upper shell (6) and the second cantilever lower shell (7) are all prepared by a stamping process, and the cross-sections of the two first cantilever upper shells (4), the first cantilever lower shell (5), the second cantilever upper shell (6) and the second cantilever lower shell (7) are all arranged in a U shape. A new processing technology for a trailer suspension arm includes the following steps: S1: clamping and fixing the axle tube (1) at a working position of an external automatic welding machine, and aligning the parts of the two trailer wheel hub assemblies (12) to be welded with the two ends of the axle tube (1), respectively, and operating the automatic welding machine to calibrate the centers of the two trailer wheel hub assemblies (12) and the axle tube (1). After the centers of the two trailer wheel hub assemblies (12) are calibrated, the automatic welding machine is started, and the two trailer wheel hub assemblies (12) and the axle tube (1) are welded by the automatic welding machine; S2: hoisting the welded axle tube (1) and trailer wheel hub assembly (12) onto a welding workbench, rotating the axle tube (1) by 25 degrees and fixing it by a fixing device, sequentially engaging the two upper bearing shells (2), adjusting the spacing between the two upper bearing shells (2) so that the distances to the stop bottom plate are equal, and welding the two upper bearing shells (2) and the axle tube (1) at the contacting parts of the two upper bearing shells (2) and the axle tube (1) by submerged arc welding; S3: The axle tube (1) is rotated 180 degrees by a fixing device and then fixed again, and then the two lower bearings (3) are buckled on the top of the two upper bearings (2) in turn, and the two lower bearings (3) are adjusted to be aligned with the upper bearings (2) on the same side, and the contact parts of the two lower bearings (3) and the axle tube (1) are welded to the two lower bearings (3) and the axle tube (1) by submerged arc welding, and then the adjacent upper bearings (2) and lower bearings (3) are welded through the reserved welding grooves.

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