Trailer air suspension oiling positioning axle pin

Abstract

The utility model discloses a trailer air suspension oiling positioning axle pin relates to positioning axle pin technical field, include: the lug support, the guide arm, one end of guide arm is rotatively connected with the lug support, the oiling type positioning device, the oiling type positioning device is connected with the guide arm and is inserted, and the guide arm is rotatively connected with the lug support through the oiling type positioning device. The utility model discloses the setting mode of cooperation of guide arm and the oiling type positioning device, through the oiling nozzle is screwed down and is dismantled, and the lubricating oil is injected to the inside of axial half -through oil channel, thereby convenient make oil liquid from each oil outlet carry out exuding, through the oiling type setting of the insert, need not dismantle the guide arm, only need to screw down the oiling nozzle can inject lubricating oil axial half -through oil channel, make lubricating supplement process more convenient and efficient, can lubricate the supply of the cooperation clearance of axle pin and bushing at any time simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of positioning pin technology, and in particular to a positioning pin for oil injection of trailer air suspension. Background Technology

[0002] As a core component ensuring vehicle stability, load-bearing capacity, and ride comfort, the reliability of the axle pin connection structure (the key component connecting the hanger bracket and the guide arm) directly affects the trailer's driving safety and service life. During long-term heavy-load and complex road conditions, the clearance between the axle pin and bushing must maintain good lubrication to reduce relative friction loss and avoid problems such as accelerated component wear and decreased fit precision.

[0003] Most existing trailer air suspension systems employ a one-piece fixed design for their axle pin structure. Lubrication typically involves pre-applying grease to the gap between the axle pin and bushing before assembly, or manually applying grease after disassembling the suspension components. However, the pre-applied grease gradually wears down and ages over time, and cannot be easily replenished, leading to lubrication failure between the axle pin and bushing, and consequently, premature wear. Manual grease application is cumbersome, requiring the disassembly of multiple connecting components, resulting in low efficiency. Furthermore, the grease is difficult to evenly distribute within the gap between the axle pin and bushing, leaving the problem of insufficient localized lubrication.

[0004] Uneven wear of the axle pin and bushing can cause the trailer wheelbase to shift, which in turn causes uneven tire wear, increasing tire replacement costs and driving safety hazards. Long-term friction wear will exacerbate stress concentration in connecting components such as the hanger bracket and guide arm, making it easy for problems such as weld cracking and breakage to occur. Utility Model Content

[0005] The purpose of this invention is to provide a trailer air suspension oil injection positioning pin to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a trailer air suspension oil injection positioning pin, comprising: Lifting lugs; Guide arm, one end of which is rotatably connected to the lifting lug bracket; An oil-injectable positioning device is provided, wherein the oil-injectable positioning device is inserted and connected to the guide arm, and the guide arm is rotatably connected to the lifting lug bracket through the oil-injectable positioning device.

[0007] Preferably, the oil-fillable positioning device includes: An interlocking mechanism is interlocked with the lifting lug bracket and the guide arm; A bushing mechanism, wherein the bushing mechanism is symmetrically fitted onto the outside of the insertion mechanism; A positioning mechanism is connected to the end of the insertion mechanism.

[0008] Preferably, the interleaving mechanism includes: A through-plug is inserted and connected to the guide arm; The first welding sleeve is slidably sleeved on the outside of the through-hole insert; The grease nipple is threadedly connected to the end of the insert.

[0009] Preferably, the insert includes: An oil-injectable bolt, wherein the oil-injectable bolt is movably sleeved with a bushing mechanism; An axial semi-through oil passage is provided, which is located inside an oil-fillable bolt, and the oil filling nozzle is threadedly connected to the end of the axial semi-through oil passage. Oil outlets, multiple oil outlets are provided on oilable bolts, and the oil outlets are interconnected with axial semi-through oil passages.

[0010] Preferably, the bushing mechanism includes: Bushing body, wherein the bushing body is slidably sleeved with an oil-injectable bolt; A flanged flange is integrally connected to the end of the bushing body; Oil guide groove, which is spirally formed inside the bushing body.

[0011] Preferably, the positioning mechanism includes: A nut, which is threaded onto one end of an oil-lubricating bolt; The second welding sleeve is movably connected to the nut. The set screw is threaded and installed on the nut.

[0012] Preferably, both the second welding sleeve and the first welding sleeve have a stop.

[0013] Preferably, the fit between the nut and the second welding sleeve is an overfit.

[0014] The technical effects and advantages of this utility model are as follows: This invention utilizes a combination of a guide arm and an oil-fillable positioning device. By unscrewing the grease nipple, lubricating oil is injected into the interior of the axial semi-through oil passage, facilitating oil seepage from various outlets. The oil-fillable design eliminates the need to disassemble the guide arm; simply unscrewing the grease nipple injects lubricating oil into the axial semi-through oil passage, making lubrication replenishment more convenient and efficient. Simultaneously, it allows for continuous lubrication of the gap between the shaft pin and bushing, ensuring oil flows into the gap between the oil-fillable bolt and the bushing body. Combined with the guide groove, this ensures more even oil filling of the gap between the oil-fillable bolt and the bushing body, guaranteeing uniform lubrication of the mating surfaces. This overcomes the shortcomings of existing structures where oil is difficult to evenly fill gaps and results in insufficient localized lubrication during grease replenishment. It also reduces uneven wear between the oil-fillable bolt and the bushing body, preventing premature wear that can lead to wheelbase misalignment, tire wear, weld breakage of connecting parts, and axle displacement. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the oil-fillable positioning device of this utility model; Figure 3 This is an exploded structural diagram of the oil-fillable positioning device of this utility model. Figure 4 This is a schematic diagram of the internal structure of the oil-injectable bolt of this utility model. Figure 5 This is a schematic diagram of the internal structure of the bushing mechanism of this utility model; Figure 6 This is an exploded structural diagram of the positioning mechanism of this utility model.

[0016] Attached Figure

[0017] 100. Lifting lug bracket; 200. Guide arm; 300. Oil-fillable positioning device; 301. Insertion mechanism; 311. Oil-fillable bolt; 312. Axial semi-through oil passage; 313. Oil outlet; 314. First welding sleeve; 315. Oil injection nozzle; 302. Bushing mechanism; 321. Bushing body; 322. Flanged flange; 323. Oil guide groove; 303. Positioning mechanism; 331. Nut; 332. Second welding sleeve; 333. Set screw. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides, for example Figures 1-6 The illustrated trailer air suspension oil-filled positioning pin includes: a hanger bracket 100; a guide arm 200, one end of which is rotatably connected to the hanger bracket 100; and an oil-filled positioning device 300, which is inserted into and connected to the guide arm 200, and the guide arm 200 is rotatably connected to the hanger bracket 100 through the oil-filled positioning device 300.

[0020] The oil-injectable positioning device 300 includes: an insertion mechanism 301, which is inserted and connected to the lifting lug bracket 100 and the guide arm 200; a bushing mechanism 302, which is symmetrically sleeved on the outside of the insertion mechanism 301; and a positioning mechanism 303, which is connected to the end of the insertion mechanism 301. By unscrewing the grease nipple 315, lubricating oil is injected into the interior of the axial semi-through oil passage 312, facilitating oil seepage from each oil outlet 313. Due to the oil-injectable design of the insertion device, there is no need to disassemble the guide arm 200; simply unscrewing the grease nipple 315 is sufficient to inject lubricating oil into the axial semi-through oil passage 312, allowing the lubricant to flow freely. The lubrication replenishment process is more convenient and efficient, and it can replenish the lubrication of the gap between the pin and the bushing at any time. This allows the oil to flow into the gap between the lubricating bolt 311 and the bushing body 321. With the guidance of the oil guide groove 323, the oil can fill the gap between the lubricating bolt 311 and the bushing body 321 more evenly, ensuring uniform lubrication of the mating surfaces of the lubricating bolt 311 and the bushing body 321. This improves the defects of existing structures where the oil is difficult to fill the gap evenly and there is insufficient lubrication in some areas. It also reduces uneven wear between the lubricating bolt 311 and the bushing body 321, and avoids many drawbacks such as early wear causing wheelbase deviation, tire wear, welding failure of connecting parts, and axle displacement.

[0021] Specifically, the insertion mechanism 301 includes: an insertion plug, which is inserted and connected to the guide arm 200; a first welding sleeve 314, which is slidably sleeved on the outside of the insertion plug; and an oil injection nozzle 315, which is threadedly connected to the end of the insertion plug. The insert includes: an oil-injectable bolt 311, which is movably sleeved with a bushing mechanism 302; an axial semi-through oil passage 312, which is formed inside the oil-injectable bolt 311, with an oil nozzle 315 threadedly connected to the end of the axial semi-through oil passage 312; and multiple oil outlets 313, which are formed on the oil-injectable bolt 311 and interconnected with the axial semi-through oil passages 312. The axial semi-through oil passages 312 facilitate the supply of oil to the multiple oil outlets 313, resulting in more uniform oil leakage. The oil nozzle 315 is threadedly connected to the end of the axial semi-through oil passage 312. The grooved fit facilitates the sealing of the end of the axial semi-through oil passage 312, thereby preventing oil leakage. Both the second welding sleeve 332 and the first welding sleeve 314 are provided with a stop, which enables the second welding sleeve 332, the first welding sleeve 314 and the lifting lug bracket 100 to fit together. Through the radial positioning function of the stop, the radial offset of the second welding sleeve 332 and the first welding sleeve 314 during the assembly process can be limited, ensuring that the second welding sleeve 332 and the first welding sleeve 314 are consistent with the axis of the oil-fillable bolt 311, while also ensuring a tight fit with the lifting lug bracket 100. This avoids the local wear aggravation of the oil-fillable bolt 311 and the bushing mechanism 302 due to assembly eccentricity, and further ensures the stability of the wheelbase.

[0022] The bushing mechanism 302 includes: a bushing body 321, which is slidably sleeved with an oil-fillable bolt 311; a flanged flange 322, which is integrally connected to the end of the bushing body 321; and an oil guide groove 323, which is spirally formed inside the bushing body 321. Through the mutual cooperation between the flanged flange 322 and the guide arm 200, the sleeve position between the bushing body 321 and the guide arm 200 is easily limited. This makes the rotation of the guide arm 200 more stable. With the opening of the oil guide groove 323, when the lubricating oil seeps out from the oil outlet 313 of the oilable bolt 311, the oil guide groove 323 can guide the oil along the inner wall of the bushing body 321 circumferentially and axially to various parts of the gap through its own spiral groove structure, so as to avoid the local accumulation of oil and uneven lubrication. At the same time, it can also help store some lubricating oil, prolong the lubrication time, and further reduce the friction and wear between the oilable bolt 311 and the bushing body 321.

[0023] Specifically, the positioning mechanism 303 includes: a nut 331, which is threadedly connected to one end of the oil-fillable bolt 311; a second welding sleeve 332, which is movably sleeved with the nut 331; and a set screw 333, which is threadedly inserted into the nut 331. The fit between the nut 331 and the second welding sleeve 332 is an overfit. The threaded fit between the nut 331 and the oil-fillable bolt 311 facilitates the fixing of the oil-fillable bolt 311. Tightening the set screw 333 ensures that the end of the set screw 333 is pressed tightly against the outer wall of the oil-fillable bolt 311, preventing the nut 331 from loosening.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A trailer air suspension oil injection positioning pin, characterized in that, include: Lifting lug bracket (100); Guide arm (200), one end of which is rotatably connected to the lifting lug bracket (100); An oil-fillable positioning device (300) is inserted into and connected to a guide arm (200), and the guide arm (200) is rotatably connected to a lifting lug bracket (100) through the oil-fillable positioning device (300).

2. The trailer air suspension oil injection positioning pin according to claim 1, characterized in that, The oil-fillable positioning device (300) includes: An interlocking mechanism (301) is interlocked with the lifting lug bracket (100) and the guide arm (200); A bushing mechanism (302) is symmetrically sleeved on the outside of the insertion mechanism (301); A positioning mechanism (303) is connected to the end of the insertion mechanism (301).

3. The trailer air suspension oil injection positioning pin according to claim 2, characterized in that, The interpenetration mechanism (301) includes: Insertion plug, which is inserted and connected to the guide arm (200); The first welding sleeve (314) is slidably sleeved on the outside of the insert; Oil injection nozzle (315), which is threaded to the end of the insert.

4. The trailer air suspension oil injection positioning pin according to claim 3, characterized in that, The insert includes: An oil-fillable bolt (311) is movably sleeved with a bushing mechanism (302); An axial semi-through oil passage (312) is provided inside an oil-fillable bolt (311), and an oil filling nozzle (315) is threaded to the end of the axial semi-through oil passage (312). Oil outlet (313), a plurality of oil outlets (313) are provided on oil-fillable bolts (311), and the oil outlets (313) are interconnected with axial semi-through oil passages (312).

5. The trailer air suspension oil injection positioning pin according to claim 2, characterized in that, The bushing mechanism (302) includes: Bushing body (321), which is slidably sleeved with an oil-fillable bolt (311); A flange (322) is integrally connected to the end of the bushing body (321); Oil guide groove (323) is spirally opened inside the bushing body (321).

6. The trailer air suspension oil injection positioning pin according to claim 3, characterized in that, The positioning mechanism (303) includes: Nut (331), said nut (331) is threaded to one end of an oil-fillable bolt (311); The second welding sleeve (332) is movably connected to the nut (331); The set screw (333) is threaded through and installed on the nut (331).

7. The trailer air suspension oil injection positioning pin according to claim 6, characterized in that, Both the second welding sleeve (332) and the first welding sleeve (314) have a stop.

8. The trailer air suspension oil injection positioning pin according to claim 6, characterized in that, The fit between the nut (331) and the second welding sleeve (332) is an overfit.

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