A novel spline assembly

Abstract

The present invention relates to a novel spline assembly (A) developed to enable length adjustment in cardan shafts, providing maximum sealing, mechanical strength, and ease of installation.

Description

[0001] DESCRIPTION

[0002] A NOVEL SPLINE ASSEMBLY

[0003] FIELD OF THE INVENTION

[0004] The present invention relates to a novel spline assembly developed to enable length variation in cardan shafts. In particular, the present invention relates to a novel spline assembly tool developed to ensure maximum sealing between the slip stub and sleeve yoke in cardan shafts without mechanical deformation and with maximum ease of assembly.

[0005] PRIOR ART

[0006] In motor vehicles, cardan shafts, which transmit torque from the gearbox to the differential, are a critical drivetrain component for vehicle movement. The components that make up the cardan shaft have specific geometric and functional characteristics and include different structural elements in terms of assembly relationships. Spline assembly are used to adjust the length of cardan shafts spline assembly consist of slip stub and sleeve yoke elements, and in current technology, seals and dust cup are used to meet the sealing requirement.

[0007] In order to connect the aforementioned dust cup and seal, the dust cup is first fitted onto the slip stub. Next, a slit is made in the seal and it is placed over the slip stub.

[0008] Figure 7 shows the configuration used in the state of the art. As shown in Figure 7, there is a dust cup and a slotted seal that will be placed on the slip stub.

[0009] The sleeve yoke is mounted onto the slip stub using spline surfaces. Finally, the dust cup is secured by tightening it onto the threaded section (screw thread) on the sleeve yoke. However, the use of dust cup and seal elements to ensure leak-proofness in the state of the art leads to some technical problems.

[0010] Creating a slit in the seal during installation compromises its integrity and reduces its sealing performance over long-term use. The sealing properties of the seal are weakened, especially due to external factors such as dust, dirt, and mud.Threading is required so that the covers with threads can be secured on the sleeve yoke. This process creates a notch effect on the sleeve yoke. Notch effect causes stress concentrations in the material, reducing the mechanical strength of the system and leading to fractures. In addition, dynamic loads such as vibrations during operation can cause spline covers to loosen or open. This situation negatively affects the reliability and longevity of the system.

[0011] Considering the state of the art, slitting the seal, threading the seal, and tightening the dust cup complicate the assembly process and require additional work. In addition to the drawbacks of leak-proof sealing and notch effects, these processes also lead to wasted time and increased production costs.

[0012] Patent application numbered US5961388A describes a cardan shaft, a sealing cover, and a bellows coupling system. A seal on the cover is achieved by a protrusion on the outer surface. However, since the cover is secured by turning during installation, there is a risk that it may come loose during operation. Furthermore, the absence of sealing in this patent application presents disadvantages in terms of sealing performance and mechanical safety.

[0013] In conclusion, spline assembly used in the state of the art have technical problems such as sealing issues, mechanical strength deficiencies, and assembly difficulties.

[0014] Considering the problems mentioned above, there is a need for a novel spline assembly tool that ensures maximum sealing between the sleeve assembly and the sleeve yoke in cardan shafts without mechanical deformation and that provides maximum ease of assembly for this sealing process.

[0015] As a result, all abovementioned problems have made it necessary to make an improvement in the relevant technical field.

[0016] OBJECT OF THE INVENTION

[0017] The present invention aims to eliminate the abovementioned problems and to make a development in the relevant technical field.

[0018] The object of the present invention is to provide maximum sealing and ease of assembly.The object of the invention is to eliminate the need for additional processes during assembly, such as threading, slitting the seal, and tightening. This allows for savings in both time and money.

[0019] The object of the present invention is to eliminate the notch effect and the resulting mechanical deformation caused by applications used in the state of the art.

[0020] The object of the present invention is to eliminate the problems of loosening and slipping in dust cup caused by vibrations and other factors during operation of sleeve tools in the state of the art.

[0021] BRIEF DESCRIPTION OF THE INVENTION

[0022] The present invention relates to a novel spline assembly so as to fulfil all aims mentioned above and will be obtained from the following detailed description.

[0023] The present invention relates to a novel spline assembly developed to enable length adjustment in cardan shafts, providing maximum sealing, mechanical strength, and ease of installation, comprising, in order to enabling length adjustment, slip stub with spline surface and sleeve yoke with spline surface; in order to provide a seal between the slip stub and the sleeve yoke; in order to be configured in a cylindrical geometry; seal with two seal lips that provide leak-proofing; a cover with a seal seating surface that enables positioning and a cover seating surface that enables connection; in order to ensure the connection of the mentioned cover to the sleeve yoke, being configured on the sleeve yoke; seat surface that supports said cover seat surface; seat channel that supports said seal seat surface and the claw that prevents the seal from coming out.

[0024] A preferred embodiment of the invention is characterized by comprising a cover connected to the slip stub and sleeve yoke with a tight fit.

[0025] A preferred embodiment of the invention is characterized by comprising a cover with a monolithic structure.

[0026] A preferred embodiment of the invention is characterized by comprising seal made of flexible material to prevent deformation (tearing) during assembly.A preferred embodiment of the invention is characterized by comprising seal lips configured with an oval geometry to prevent deformation during assembly and ensure leak-tightness.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 shows an exploded isometric view of a novel spline assembly.

[0029] Figure 2 shows the isometric view of the cover.

[0030] Figure 3 shows the side sectional view of the cover.

[0031] Figure 4 shows the isometric view of the sleeve yoke.

[0032] Figure 5 shows a detailed view of the tip of the sleeve yoke.

[0033] Figure 6 shows a side view of a novel spline assembly.

[0034] Figure 7 shows the exploded isometric view of the sleeve tool from the prior art.

[0035] DESCRIPTION OF THE REFERENCE NUMBERS IN FIGURES

[0036] A. A novel spline assembly

[0037] 1. Slip stub

[0038] 11. Slip stub spline surface

[0039] 2. Sleeve yoke

[0040] 21. Spline surface

[0041] 22. Seat surface

[0042] 23. Seat channel

[0043] 24. Claw

[0044] 3. Cover

[0045] 31. Seal311. Lip

[0046] 312. Seal seat surface

[0047] 32. Cover seat surface

[0048] DETAILED DESCRIPTION OF THE INVENTION

[0049] In this detailed description, a novel spline assembly (A) of the present invention is described by means of examples only for clarifying the subject matter such that no limiting effect is created.

[0050] The present invention relates to a novel spline assembly (A) developed to enable length adjustment in cardan shafts, providing maximum sealing, mechanical strength, and ease of installation.

[0051] The present invention comprises a slip stub (1) with slip stub spline surface (11) and sleeve yoke (2) with spline surface (21) as seen in figures 1, 4 and 6. Slip stub (1) and sleeve yoke (2) enable length change in the cardan shafts The invention comprises (3) configured to be monolithic in cylindrical geometry as shown in figures 1-3. The aforementioned cover (3) is connected to the slip stub (1 ) and sleeve yoke (2) by a tight fit to ensure a seal.

[0052] As shown in Figures 2 and 3, the cover (3) comprises a seal (31 ) with two seal lips (311 ) that provide a seal. The aforementioned seal (31) comprises a seal seat surface (312) which enables positioning. The cover (3) comprises a seat surface (32) that connects to the same. To prevent deformation (tearing) during assembly, the seal (31) is made of flexible material. In addition, the seal lips (311 ) are configured to have an oval geometry so that no deformation occurs during assembly and to ensure leak-proofness.

[0053] The invention comprises a seat surface (22) and a seat channel (23) configured on the sleeve yoke (2) to enable the cover (3) to be connected to the sleeve yoke (2). As shown in Figures 4-6, the seat surface (22) acts as a bearing for the cover (3) by contacting the cover seat surface (32). The aforementioned seat channel (23) acts as a bearing for the cover (3) by contacting the seal seat surface (312). In addition, in positioning the cover (3), the seat channel (23) and the seal seat surface (312) are first brought into contact with each other. As shown in Figure 5, the sleeve yoke (2) comprises a claw (24) configured between the mouth section and the seat channel (23). The aforementionedclaw (24) prevents the spline assembly (A) from coming off during operation. This ensures maximum sealing.

[0054] To assemble a novel spline assembly (A) as shown in Figure 6, the cover (3) is first fitted onto the slip stub spline surface (11) on the slip stub (1). Then, the slip stub (1) is connected to the sleeve yoke (2) via the slip stub spline surface (11) and the spline surface (21). With this connection, the seal seat surface (312) on the cover (3) is connected to the seat channel (23), and the cover seat surface (32) is connected to the seat surface (22). Afterwards, the seal (31) is compressed by means of the claw (24). Thus, the seal (31) makes contact with the slip stub (1) and provides a seal. Here, the fact that the seal (31) comprises two seal lips (311) ensures that the sealing is maximized.

[0055] The invention is a novel spline assembly (A) which, with the help of its constituent elements and their structure, eliminates the sealing problems encountered in existing spline assembly, as well as the mechanical deformations, assembly difficulties, and additional process requirements caused by existing structures used for sealing operations.

[0056] The protection scope of the invention is specified in the claims and cannot be limited to the description made for illustrative purposes in this brief and detailed description. It is clear that a person skilled in the art can present similar embodiments in the light of the above descriptions without departing from the main theme of the invention.

Claims

CLAIMS1. A novel spline assembly (A) developed to enable length adjustment in cardan shaft, providing maximum sealing, mechanical strength, and ease of installation, characterized by comprising;• In order to enable length adjustment;o Slip stub (1 ) with shaft spline surface (11 ) and sleeve yoke (2) with spline surface (21),• In order to provide a seal between the slip stub (1) and the sleeve yoke (2);o In order to be configured in a cylindrical geometry;■ Seal (31 ) with two seal lips (311 ) that provide leak-proofing;a cover (3) with a seal seat surface (312) that enables positioning and a cover seat surface (32) that enables connection;o In order to ensure the connection of said cover (3) to the slip stub (2), being configured on the sleeve yoke (2);■ Seat surface (22) that supports said cover seat surface (32);seat channel (23) that supports said seal seat surface (312) and the claw (24) that prevents the seal (31) from coming out.

2. A novel spline assembly (A) according to claim 1, characterized by comprising a cover (3) which is connected to the slip stub (1 ) and the sleeve yoke (2) by a tight fit.

3. A novel spline assembly (A) according to claim 1, characterized by comprising a cover (3) with a monolithic structure.

4. A novel spline assembly (A) according to claim 2, characterized by comprising seal (31) made of flexible material to prevent deformation (tearing) during assembly.A novel spline assembly (A) according to claim 4, characterized by comprising seal lips (311) configured with an oval geometry to prevent deformation during assembly and ensure leak-tightness.

Images