Protective body cover for shock absorbers

The protective body cover for shock absorbers addresses breakage issues by incorporating a rigid structure with specific design features, enhancing durability and sealing efficiency.

WO2026127877A1PCT designated stage Publication Date: 2026-06-18MAYSAN MANDO OTOMOTIV PARCALARI SANAYI VE TICARET ANONIM SIRKETI

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
MAYSAN MANDO OTOMOTIV PARCALARI SANAYI VE TICARET ANONIM SIRKETI
Filing Date
2025-08-22
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing shock absorber protective covers in vehicles suffer from breakage and crushing during the press-fitting process due to channel structures, affecting performance and durability.

Method used

A protective body cover with a lateral wall, upper wall, shaft housing, and air discharge opening, featuring a rigid structure with a minimum thickness of 8 mm, inward protrusions, chamfered portions, and a plastic-based material to prevent breakage and enhance durability.

🎯Benefits of technology

The solution ensures high durability during press-fitting and operation, reduces friction, and maintains a stable internal environment, preventing breakage and deformation while ensuring efficient oil and gas sealing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a protective body cover (20) in shock absorbers (10) used in vehicles, configured to provide coverage between the body tube (11) and the piston rod (13); comprising a lateral wall (21) configured to be seated against the outward-facing surface of the body tube (11), at least one upper wall (23) configured to provide coverage between the body tube (11) and the piston rod (13), at least one shaft housing (24) on the upper wall (23) through which the piston rod (13) passes, and at least one air discharge opening (26) positioned on the side of the upper wall (23) facing the body tube (11) and adjacent to the shaft housing (24). Accordingly, its novelty is that it comprises at least one support area (27) for seating the end portion (12) of the body tube (11) between the air discharge opening (26) and the lateral wall (21).
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Description

[0001] PROTECTIVE BODY COVER FOR SHOCK ABSORBERS

[0002] TECHNICAL FIELD

[0003] The invention relates to a protective body cover in shock absorbers used in vehicles, configured to provide coverage between the body tube and the piston rod; comprising a lateral wall configured to be seated against the outward-facing surface of the body tube, at least one upper wall configured to provide coverage between the body tube and the piston rod, at least one shaft housing on the upper wall through which the piston rod passes, and at least one air discharge opening positioned on the side of the upper wall facing the body tube and adjacent to the shaft housing.

[0004] PRIOR ART

[0005] Shock absorbers are widely used in vehicles for the purpose of damping the impacts originating from the road surface and increasing driving comfort. These shock absorbers comprise a cylindrical body containing oil or gas and a piston rod that moves within this fluid or gas. The piston rod performs a reciprocating motion, absorbing impact energy and preventing it from being transmitted to the vehicle. For the shock absorber to operate efficiently, the oil and gas contained therein must be maintained in a sealed environment. Therefore, seals and protective covers are used to ensure sealing between the body and the piston rod.

[0006] Such shock absorbers utilize various protective covers in order to maintain the structural integrity of the components between the body tube and the piston rod during the movement of the piston rod. Although the protective covers provide safety for the body and the piston rod, problems such as crushing and breakage occur during the press-fitting process due to the channel structure on these covers. Breakages particularly occur when the body comes into contact with the channels on the cover. As a result, this adversely affects the performance and durability of the shock absorber.

[0007] As a result, all the above-mentioned problems have made it imperative to make an innovation in the relevant technical field.

[0008] SUMMARY OF THE INVENTION The present invention relates to a protective body cover intended to eliminate the disadvantages mentioned above and to provide new advantages to the relevant technical field.

[0009] An object of the invention is to provide a shock absorber protective body cover that offers a rigid structure preventing breakages.

[0010] In order to achieve all the objectives mentioned above and that will become apparent from the detailed description below, the present invention relates to a protective body cover in shock absorbers used in vehicles, configured to provide coverage between the body tube and the piston rod; comprising a lateral wall configured to be seated against the outwardfacing surface of the body tube, at least one upper wall configured to provide coverage between the body tube and the piston rod, at least one shaft housing on the upper wall through which the piston rod passes, and at least one air discharge opening positioned on the side of the upper wall facing the body tube and adjacent to the shaft housing. Accordingly, its novelty is that it comprises at least one support area for seating the end portion of the body tube between the air discharge opening and the lateral wall. Thus, high durability is ensured during the press-fitting process and during operation.

[0011] A possible embodiment of the invention is characterized in that the upper cover wall thickness is at least 8 mm. Thus, problems such as cracking or breaking of the protective body cover are prevented.

[0012] A possible embodiment of the invention is characterized in that the air discharge opening is provided in the form of an inward recess on the side of the upper cover facing the body tube. Thus, the air is discharged easily and effectively.

[0013] A possible embodiment of the invention is characterized in that the lateral wall comprises an inward protrusion form for being seated against the body tube. Thus, the lateral wall is fixed to the body tube in a tight and secure manner.

[0014] A possible embodiment of the invention is characterized in that the upper wall comprises at least one chamfered portion on the side facing the shaft housing. Thus, friction is reduced during the passage of the piston rod. A possible embodiment of the invention is characterized in that it is manufactured from a plastic-based material. Thus, a lighter and more durable structure is obtained.

[0015] BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 shows a representative isometric view of the shock absorber according to the invention.

[0017] Figure 2 shows a representative isometric view of the protective body cover according to the invention.

[0018] Figure 3 shows a representative front view of the protective body cover according to the invention.

[0019] DETAILED DESCRIPTION OF THE INVENTION

[0020] In this detailed description, the subject of the invention is explained by way of example only for a better understanding of the subject, which shall not create any limiting effect.

[0021] Figure 1 shows a representative isometric view of the shock absorber (10) according to the invention. Accordingly, the shock absorber (10) is a component that absorbs impacts originating from the road surface in vehicles, reduces vibrations, and increases driving comfort. As a part of the suspension system, it ensures safe driving by maintaining the contact between the wheels and the road. The protective body cover (20) of the shock absorber (10) is a cover component used to protect the shock absorber (10) system from external factors in vehicles. Accordingly, the shock absorber (10) comprises at least one body tube (11). The body tube (11), in its preferred embodiment, has a cylindrical structure. The body tube (11) ensures the stability of the moving components within the shock absorber (10). The body tube (11 ) functions as the outer protective layer of the shock absorber (10).

[0022] The shock absorber (10) comprises at least one piston rod (13) connected within the body tube (11 ). The piston rod (13) is the main movable component of the shock absorber (10) system and dampens the impacts originating from the road surface. The piston rod (13) extends in parallel with the body tube (11) and protrudes outward from the body tube (11 ). In its preferred embodiment, the piston rod (13) also has a cylindrical structure. Figure 2 shows a representative isometric view of the protective body cover (20) according to the invention. Accordingly, the shock absorber (10) comprises a protective body cover (20) configured to provide coverage between the body tube (11 ) and the piston rod (13); the protective body cover (20) comprises a lateral wall (21) configured to be seated against the outward-facing surface of the body tube (11), at least one upper wall (23) configured to provide coverage between the body tube (11) and the piston rod (13), at least one shaft housing (24) on the upper wall (23) through which the piston rod (13) passes, and at least one air discharge opening (26) positioned on the side of the upper wall (23) facing the body tube (11 ) and adjacent to the shaft housing (24).

[0023] The lateral wall (21 ) provides protection for the structure of the protective body cover (20) against external factors. This lateral wall (21 ), which is integrated into the protective body cover (20) within the shock absorber (10) system, is seated against the outer surface of the body tube (11) and assists in forming a secure connection between the cover and the tube during assembly. The lateral wall (21) extends from the edges of the upper wall (23) toward the body tube (11). The lateral wall (21 ) comprises at least one protrusion (22). These protrusions (22) are positioned at equal intervals on the surface of the lateral wall (21) facing the body tube (11). In its preferred embodiment, the protrusions (22) have a rectangular shape and enable a tight and secure connection to the body tube (11).

[0024] As the lateral wall (21) is seated onto the body tube (11), it comprises an inward protrusion (22) form. The said inward protrusion (22) form increases the contact between the body tube (11) and the protective body cover (20), facilitating the assembly process while also preventing undesired displacements. The inward protrusion (22) form extends along the circumference of the body tube (11). In this way, it increases resistance against pressfitting processes and ensures that the body tube (11 ) is held more tightly within the protective body cover (20), preventing it from becoming displaced due to forces such as vibration or impact.

[0025] The upper wall (23) serves to provide coverage between the body tube (11 ) and the piston rod (13). In its preferred embodiment, the upper wall (23) has a circular form and fully covers the upper surface of the protective body cover (20). The upper wall (23) corresponds to the outward-facing surface of the protective body cover (20). The upper wall (23) plays a role in enabling the passage of the piston rod (13) and ensuring sealing between the protective body cover (20) and the piston rod (13). The protective body cover (20) comprises a shaft housing (24) on the upper wall (23) through which the piston rod (13) passes. The shaft housing (24) supports the stability of the shock absorber (10) by enabling the piston rod (13) to operate in harmony with the upper wall (23) during its movement. The shaft housing (24) is essentially a hole located at the exact center of the upper wall (23). The shaft housing (24) has a form through which the piston rod (13) can pass and, in its preferred embodiment, has a circular shape. The shaft housing (24) on the upper wall (23) allows for the movement of the piston rod (13), while also providing a tight seal around the rod. In this way, it prevents the leakage of oil and gas, thereby contributing to the sealing function of the shock absorber (10) system.

[0026] The protective body cover (20) comprises at least one chamfered portion (25) on the side of the upper wall (23) facing the shaft housing (24). The chamfered portion (25) facilitates the passage of the piston rod (13), assisting in the proper alignment of the rod with the upper wall (23) during the assembly process. The chamfered portion (25) reduces friction as the rod passes through the cover and minimizes the risk of wear. In this way, the piston rod (13) is able to move in uninterrupted harmony with the upper wall (23), providing a smooth transition that extends the service life of the shock absorber (10) system. The chamfered portion (25) extends along the shaft housing (24).

[0027] Figure 3 shows a representative front view of the protective body cover (20) according to the invention. Accordingly, at least one guide (15) is positioned between the body tube (11 ) and the piston rod (13). The mentioned guide (15) comprises at least one seal (14) on its side facing the protective body cover (20), serving as a bearing. The said seal (14), as one of the sealing elements of the shock absorber (10), prevents the leakage of oil and gas within the system. The seal (14) ensures sealing in the region between the piston rod (13) and the body tube (11). This sealing function maintains the performance of the shock absorber (10) and ensures stable operation of the system. The seal (14) also prevents external factors from entering the shock absorber (10), contributing to the long service life of the internal components.

[0028] The guide (15) is positioned directly beneath the seal (14), exerting pressure on the seal during closure, and this pressure enables the proper regulation of oil circulation within the shock absorber (10). The oil passes through the guide (15). The guide (15) serves as a bearing for the piston rod (13) during operation, supporting the linear motion of the piston rod (13) and directing the flow of oil during the piston movement. In this way, efficient operation of the shock absorber (10) system is ensured, while the effects of vibrations and external impacts are reduced, thereby enhancing driving comfort. The protective body cover (20) comprises at least one air discharge opening (26). The air discharge opening (26) serves to balance the air pressure inside the cover within the shock absorber (10) system and to allow excess air formed inside to be discharged in a controlled manner. The air discharge opening (26) is positioned on the inner surface of the upper wall (23) of the cover structure, facing the body tube (11), adjacent to the shaft housing (24), and in the form of an inward recess. In its preferred embodiment, the air discharge opening (26) is provided in four units, spaced at equal intervals. It is in the form of an inward recess extending from the shaft housing (24) toward the lateral wall (21 ). The air discharge opening (26) does not extend to the lateral wall (21 ). In this way, breakages of the protective body cover (20) are prevented. In a preferred embodiment, the inward recess form of the air discharge opening (26) extends toward the area between two protrusions (22) located on the lateral wall (21 ). The air discharge opening (26) enables the controlled discharge of air pressure within the cover. Thus, a stable internal environment is maintained within the shock absorber (10), and the risk of deformation caused by excessive pressure in the cover structure is reduced.

[0029] The body tube (11 ) comprises at least one end portion (12). The said end portion (12) forms a durable contact surface at the junction point where the body tube (11) meets the cover, thereby ensuring that the body tube (11 ) is securely positioned within the protective body cover (20) during assembly. The end portion (12) extends toward the side of the upper wall (23) facing the piston rod (13). The end portion (12) contacts the surface it engages in a perpendicular manner. The seal (14) within the shock absorber (10) is positioned in close proximity to the end portion (12). The seal (14) extends from the end portion (12) toward the piston rod (13). The end portion (12) does not contact the air discharge opening (26) but instead contacts the surface of the cover. In this way, breakage of the protective body cover (20) is prevented. The upper cover wall thickness (D1 ) is at least 8 mm. The wall thickness (D1 ) is 8 mm or more. The mentioned wall thickness (D1) corresponds to the distance between the end portion (12) and the upper wall (23). Thanks to the increased wall thickness (D1), even though the end portion (12) contacts the protective body cover (20), breakage does not occur. Thus, by increasing the thickness, breakage during press-fitting and testing is also prevented.

[0030] The protective body cover (20) comprises at least one support area (27) for seating the end portion (12) of the body tube (11 ) between the air discharge opening (26) and the lateral wall (21). The support area (27) is positioned on the surface of the protective body cover (20) facing the piston rod (13). The end portion (12) contacts the said support area (27). The support area (27) is the section located between the air discharge opening (26) and the lateral wall (21). The end portion (12), by resting against the support area (27), prevents the protective body cover (20) from breaking during press-fitting processes. The support area (27) provides additional support at the point where the body tube (11 ) is seated into the cover structure, thereby preventing displacement or loosening of the body tube (11) during assembly and operation. Designed especially to increase resistance against vibrations and impacts that arise during the operation of the shock absorber (10) system, the support area (27) helps maintain tight contact between the cover and the tube.

[0031] The protective body cover (20) is manufactured from a plastic-based material. In this way, the shock absorber (10) covers are made lighter and more durable, while also enhancing their flexibility properties. The plastic material increases fatigue resistance and minimizes the risk of cracking or breaking that may occur in the protective body cover (20). Since plastic-based material is more resistant to environmental factors, it is able to maintain its performance even during long-term use under external environmental conditions.

[0032] The scope of protection of the invention is specified in the appended claims and cannot be limited to what is described for illustrative purposes in this detailed description. It is clear that a person skilled in the art can produce similar embodiments in the light of what is explained above, without deviating from the main theme of the invention.

[0033] REFERENCE NUMERALS GIVEN IN THE DRAWING

[0034] 10 Shock Absorber

[0035] 11 Body Tube

[0036] 12 End Portion

[0037] 13 Piston Rod

[0038] 14 Seal

[0039] 15 Guide

[0040] 20 Protective Body Cover

[0041] 21 Lateral Wall

[0042] 22 Protrusion

[0043] 23 Upper Wall

[0044] 24 Shaft Housing

[0045] 25 Chamfered Portion

[0046] 26 Air Discharge Opening

[0047] 27 Support Area

[0048] D1 Upper Cover Wall Thickness

Claims

CLAIMS1 . A protective body cover (20) in shock absorbers (10) used in vehicles, configured to provide coverage between the body tube (11) and the piston rod (13); comprising a lateral wall (21 ) configured to be seated against the outward-facing surface of the body tube (11), at least one upper wall (23) configured to provide coverage between the body tube (11) and the piston rod (13), at least one shaft housing (24) on the upper wall (23) through which the piston rod (13) passes, and at least one air discharge opening (26) positioned on the side of the upper wall (23) facing the body tube (11) and adjacent to the shaft housing (24), characterized in that it comprises at least one support area (27) for seating the end portion (12) of the body tube (11) between the air discharge opening (26) and the lateral wall (21).

2. A protective body cover (20) according to claim 1 , characterized in that the upper cover wall thickness (D1) is at least 8 mm.

3. A protective body cover (20) according to claim 1 , characterized in that the air discharge opening (26) is provided in the form of an inward recess on the side of the upper cover facing the body tube (11 ).

4. A protective body cover (20) according to claim 1 , characterized in that the lateral wall (21) comprises an inward protrusion form for being seated against the body tube (11 ).

5. A protective body cover (20) according to claim 1 , characterized in that the upper wall (23) comprises at least one chamfered portion (25) on the side facing the shaft housing (24).

6. A protective body cover (20) according to claim 1 , characterized in that it is manufactured from a plastic-based material.