Self-Lubricating Bushing for Semi-Trailer Suspension Equalizer Beam

Technical Field

The utility model belongs to the technical field of automotive component equipment, and more particularly relates to a self-lubricating bushing for a semi-trailer suspension equalizer beam.

Background Technology

A bushing is a supporting component used outside mechanical parts to achieve sealing, wear protection, and similar functions. It refers to a ring sleeve serving as a liner. In valve applications, bushings are generally installed inside valve covers and are usually made of corrosion-resistant materials such as PTFE or graphite for sealing purposes.

Bushings are highly versatile and can perform many functions. Generally speaking, bushings are components used to protect equipment. Their use can reduce wear, vibration, and noise, while also providing anti-corrosion effects. In addition, bushings facilitate the maintenance of mechanical equipment and simplify equipment structures and manufacturing processes.

Bushings are required at the connection ends between the semi-trailer suspension equalizer beam and the axle, or between the leaf spring and the axle. However, these areas have limited operating space and bear heavy loads, making it unsuitable to disassemble them for lubrication.

Chinese utility model patent No. 201520475388.0 discloses a bearing bushing provided with oil holes on the bushing body and oil grooves at the connection between the ring and the side wall of the bushing body, effectively solving the above problems and achieving a self-lubricating effect. However, the oil grooves in that structure are open-type grooves, which are prone to oil leakage and uneven oil distribution.

Summary of the Invention

To solve the above problems and overcome the deficiencies of the prior art, the utility model provides a self-lubricating bushing for a semi-trailer suspension equalizer beam that is easy to machine, has excellent sealing performance without oil leakage, and provides uniform oil distribution.

The first technical problem solved is the difficulty of machining, especially in areas with shaft shoulders where integral bushings cannot be used.

The second technical problem solved is oil leakage caused by open-type oil grooves.

The third technical problem solved is uneven oil distribution.

The technical solution adopted by the utility model is as follows:

The self-lubricating bushing for the semi-trailer suspension equalizer beam comprises a bushing body and a flange fixedly arranged at one end of the bushing body, characterized in that:

The bushing body and the flange are both designed as split structures composed of two mating annular halves;

Oil storage grooves and oil return grooves are respectively arranged along the axial direction on the end faces of the annular bodies;

The bushing body is provided with oil holes in a direction perpendicular to the axis, and the oil holes communicate with the oil storage grooves and oil return grooves;

Internal threads and external threads are respectively arranged along the axial direction on the inner and outer surfaces of the bushing body.

Further:

The internal threads and external threads both communicate with the oil holes;

The end faces of the annular bodies are provided with matching grooves and protrusions for engagement;

Both sides of the oil storage grooves and oil return grooves are designed with one through-hole end and one blind-hole end;

The through-hole ends of the oil storage grooves and oil return grooves are provided with threaded plugs.

Beneficial Effects

The utility model has the following advantages:

The bushing body and flange adopt a split structure, reducing machining and installation difficulty and facilitating operation in narrow spaces;

The oil storage grooves and oil return grooves arranged axially on the end faces of the annular bodies, combined with the structure of one through-hole end and one blind-hole end, allow excess lubricant to flow back through the threads into the return groove, facilitating lubrication while preventing oil leakage;

The internal and external threads communicate with the oil holes, and the oil holes communicate with the oil storage grooves and oil return grooves, thereby achieving uniform oil distribution.

Description of Drawings

Figure 1 is a schematic structural diagram of the utility model.

Reference numerals:

Bushing body

Flange

External thread

Oil hole

Oil storage groove

Internal thread

Oil return groove

Groove

Protrusion

Detailed Description

To make the objectives, technical solutions, and advantages of the utility model clearer, the following description is provided in conjunction with Figures 1-2.

In the description of the utility model, terms such as “center,” “upper,” “lower,” “left,” “right,” “rear,” “lower left,” “upper right,” and “outer” indicate positional relationships based on the drawings and are used only for convenience of description and simplification. They do not imply that the referenced device or component must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be interpreted as limiting the protection scope of the utility model. In addition, terms such as “first,” “second,” and “third” are used only for descriptive purposes and should not be understood as indicating relative importance.

The specific implementation of the utility model is as follows:

The self-lubricating bushing for the semi-trailer suspension equalizer beam comprises a bushing body 1 and a flange 2 fixedly arranged at one end of the bushing body 1, characterized in that:

The bushing body 1 and flange 2 are both designed as split structures composed of two engaged annular halves;

Oil storage grooves 5 and oil return grooves 7 are respectively arranged axially on the end faces of the annular bodies;

Oil holes 4 are arranged in the bushing body 1 in a direction perpendicular to the axis, and the oil holes 4 communicate with the oil storage grooves 5 and oil return grooves 7;

Internal threads 6 and external threads 3 are respectively arranged axially on the inner and outer surfaces of the bushing body 1.

Further:

The internal threads 6 and external threads 3 both communicate with the oil holes 4;

The end faces of the annular bodies are provided with mating grooves 8 and protrusions 9;

Both sides of the oil storage grooves 5 and oil return grooves 7 are designed with one through-hole end and one blind-hole end;

The through-hole ends of the oil storage grooves 5 and oil return grooves 7 are provided with threaded plugs.

It should be noted that the working process of the self-lubricating bushing for the semi-trailer suspension equalizer beam is as follows:

The annular halves are engaged together through the grooves 8 and protrusions 9 and sleeved onto the bearing, after which the bearing and bushing are fitted together with the bearing seat;

During use, the threaded plugs at the through-hole ends of the oil storage grooves 5 and oil return grooves 7 are opened, and lubricating oil is injected into the oil storage grooves 5 using a grease gun. The lubricating oil flows out through the oil holes 4 and contacts the bearing end surface. The oil is then evenly distributed over the bearing end surface through the internal threads 6 and external threads 3;

The oil return groove 7 positioned at the lower side due to gravity collects the lubricant at the bottom. The accumulated lubricant is guided back to the oil return groove 7 through the internal threads 6 and external threads 3, thereby preventing excess lubricant from overflowing and causing leakage. Meanwhile, the gaps between the grooves 8 and protrusions 9 also assist in guiding the oil. The threaded plugs at the through-hole ends of the oil storage grooves 5 and oil return grooves 7 further prevent lubricant leakage.

The above descriptions illustrate the basic principles, main features, and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The embodiments and descriptions are merely used to explain the principles of the utility model. Various modifications and improvements may be made without departing from the spirit and scope of the utility model, and all such modifications and improvements shall fall within the protection scope of the utility model as defined by the appended claims and their equivalents.