TW202005830A - Slip yoke cover structure and manufacturing method thereof capable of having better sealing effect to preventing the leakage of grease and lowering manufacturing cost - Google Patents

Abstract

The creation includes a slip yoke, a sealing sheet and a cover, wherein the slip yoke has a rod body; and the end surface of the rod body has a recessed portion with a bottom surface. A wall surface of the recessed portion is inwardly contracted to form an annular groove at a position contacting the bottom surface and the bottom surface is provided with a sliding axle hole penetrating the rod body. The sealing sheet is placed on the bottom surface of the recessed portion. The cover is spherical-shell shaped and the shape and size of the edge of the cover corresponds to the annular groove. The cover is fixed in such a manner that the center is recessed downward and the edge of the cover is forcibly secured into the annular groove, so as to press the sealing sheet downward to contact the bottom surface to seal the sliding axle hole. Accordingly the sliding axle hole can be filled with grease to provide lubricating effect, and an external tension generated by the downward deformation of the cover causes the edge of the cover to deformedly pressed into the annular groove forcibly, while pressing the sealing sheet to be tightly abutted against the bottom surface to cover the sliding axle hole, thereby achieving a better sealing effect.

Description

Cover structure of telescopic yoke and manufacturing method thereof

This creation is about the telescopic yoke, especially about the cover of the telescopic yoke.

Please refer to "Figure 1", telescopic yoke 1, also known as slip yoke (slip yoke), is an important part of automotive transmission bearings, commonly used in transmission systems, gearboxes, etc. The structure of telescopic yoke 1 includes a The transmission rod 2 and a connecting yoke 3 perpendicular to the axial direction of the transmission rod 2 have a first yoke hole 4 and a second yoke hole 5 whose center axis is on the same line, the center of the transmission rod 2 A sliding shaft hole 6 is provided. The sliding shaft hole 6 is filled with grease to provide a lubricating effect, and a cover 7 may be provided to close the sliding shaft hole 6 to prevent grease from leaking out.

The sliding shaft hole 6 is for a gearbox shaft (not shown) to slide in. The gearbox shaft will slide in the sliding shaft hole 6 and thus will generate considerable pressure on the cover 7, which About 10~15 kg/m2. Therefore, how the cover 7 fixes and closes the sliding shaft hole 6 and can withstand the pressure impact generated by the transmission gearbox shaft is a very important issue.

The conventional way of closing the sliding shaft hole 6 by the cover 7 can be mainly by welding, stamping or applying a chemical, etc., to fix the cover 7 to the sliding shaft hole 6, the welding method is quite time-consuming And it is easy to cause local defects due to local defects, such as lack of welding, etc., and it is easy to cause the problem of grease leakage. In the punching mode, the sliding shaft hole 6 has a larger outer flaring hole that can be placed in the cover 7. After the cover 7 is placed in the outer flaring hole, the punch is used to impact the outer flaring hole. Around, the outer reaming hole is permanently deformed to reduce the hole diameter, so as to fix the cover 7, but it takes time at the same time, and there are also local area defects that cause the problem of grease leakage. As for the connection of the upper medicament, there will be environmental pollution, metal staining and grease deterioration and other environmental protection and use problems.

The main purpose of this creation is to expose a retractable yoke cover structure, which has a low cost and a good sealing effect.

The secondary purpose of this creation is to disclose a method of manufacturing a retractable yoke cover structure, which has a fast manufacturing speed and low cost, and can meet the needs of use.

In order to achieve the above purpose, the present invention discloses a telescopic yoke cover structure, which includes a telescopic yoke, a sealing sheet and a cover, wherein the telescopic yoke has a rod body, and an end portion of the rod body has a recessed portion, the recessed portion The portion has a bottom surface, and the wall surface of the recessed portion shrinks inwardly to form an annular groove where the bottom surface contacts, and the bottom surface is provided with a sliding shaft hole penetrating the rod body; the sealing sheet is placed on the bottom surface The cover is spherical and the outer shape and size of the edge of the cover correspond to the annular groove, and the cover is depressed downward from the center and the edge of the cover is forced into the annular groove And the sealing piece is pressed downward to contact the bottom surface to close the sliding shaft hole.

For the manufacturing method of the telescopic yoke cover structure, the steps include: a preparation procedure, an assembly procedure and a stamping procedure.

Wherein, the preparation procedure is to provide the telescopic yoke, the sealing sheet and the cover as described above; the assembly procedure is to first place the sealing sheet on the bottom surface, and then cover the sealing sheet with the cover facing down And the edge of the cover contacts the annular groove; and the punching process is to stamp the center of the cover downward and permanently deform, so that the edge of the cover is forced into the annular groove while allowing the seal The cover presses down the sealing piece to contact the bottom surface to close the sliding shaft hole.

According to this, the sliding shaft hole can be filled with grease to provide a lubricating effect, and the outer tension generated by the downward deformation of the cover allows the edge of the cover to deform into the annular groove while pressing The sealing piece closes to the bottom surface to close the sliding shaft hole, so as to achieve a good sealing effect, and can resist the pressure of up to 30 kg/m2 to avoid oil leakage. Moreover, its manufacturing method is quite fast and simple, can be mass-produced at low cost, and meets the manufacturing requirements.

The detailed description and technical content of this creation are now explained in conjunction with the diagram as follows:

Please refer to "Fig. 2" and "Fig. 3", which are the exploded and sectional schematic diagrams of this creative structure. As shown in the figure: the present invention is a telescopic yoke cover structure, which includes a telescopic yoke 10, a sealing sheet 20 and a cover 30, wherein the telescopic yoke 10 has a rod body 11, the end surface of the rod body 11 has A recessed portion 12 having a bottom surface 13, and the wall surface of the recessed portion 12 shrinks inwardly to form an annular groove 14 where the bottom surface 13 contacts the bottom surface 13, the annular groove 14 preferably has a cross-section The shape is a triangular shape, and the bottom surface 13 is provided with a sliding shaft hole 15 penetrating the rod body 11.

The sealing sheet 20 can be made of a soft material, such as rubber, etc. The sealing sheet 20 is placed on the bottom surface 13. The cover 30 has a spherical shell shape, and the outer shape and size of the edge of the cover 30 correspond to the annular groove 14, and the cover 30 is depressed downward from the center and the edge of the cover 30 is forced into the ring The groove 14 is fixed, and the sealing piece 20 is pressed downward to contact the bottom surface 13 to close the sliding shaft hole 15. Moreover, the sealing sheet 20 may be fixed on the lower surface of the cover 30 by adhesion, which can prevent the sealing sheet 20 from abnormally shifting and causing the sliding shaft hole 15 not to be completely sealed.

Please refer to "Fig. 4A", "Fig. 4B" and "Fig. 4C", where the manufacturing method of this creation includes a preparation procedure, an assembly procedure and a stamping procedure.

Wherein the preparation procedure is to provide the aforementioned retractable yoke 10 (as shown in FIG. 4A), the sealing sheet 20 (as shown in FIG. 2) and the cover 30 (as shown in FIG. 2), the retractable yoke 10 is usually The rough embryo is made by casting, and then polished to the required size and structure by mechanical processing. The sealing sheet 20 is generally made of rubber material, and the cover 30 can be made by stamping using a punch press.

The assembly procedure is to first place the sealing sheet 20 on the bottom surface 13, and then let the cover 30 cover the sealing sheet 20 downward and the edge of the cover 30 contacts the annular groove 14 (as shown in FIG. 4B) (Showing), when placing the sealing sheet 20, it must be noted that the sealing sheet 20 must not be bent or twisted, etc., and needs to completely cover the sliding shaft hole 15.

The punching process is to punch the center of the cover 30 downward to be permanently deformed, so that the edge of the cover 30 is forced into the annular groove 14 and the cover 30 is pressed downward to press the sealing piece 20 into contact The bottom surface 13. During the stamping process, a stamping die 40 may be used to press the center of the cover 30 (as shown in FIG. 4C ), so that the center of the cover 30 is depressed downward and permanently deformed.

In addition, in another embodiment of the sealing sheet 20 and the cover 30, the sealing sheet 20 can also be directly adhered and fixed on the cover 30. In this way, the sealing sheet 20 can be avoided in the stamping process Sliding without actually sealing the sliding shaft hole 15, and during the assembly process, the sealing piece 20 and the cover 30 are placed on the bottom surface 13 together, which can also simplify the process.

Please refer to "Figure 5" again. After the creation is completed, the sliding shaft hole 15 can be filled with grease 50, and a transmission gearbox shaft 60 is used. This creation is due to the cover 30 The external tension generated by the downward deformation allows the edge of the cover 30 to deform into the annular groove 14 while pressing the sealing piece 20 against the bottom surface 13 to cover the sliding shaft hole 15 to achieve good Sealing effect.

In summary, the characteristics of this creation are:

1. Fast processing and low manufacturing cost, so it can meet the needs of reducing manufacturing cost.

2. The external tension generated by the downward deformation of the cover can resist pressure up to 30 kg/m2, effectively avoiding oil leakage.

3. The cross-section of the annular groove can be designed into a triangular shape, which can force the edge of the cover to deform and snap in, effectively fixing the cover.

4. The sealing sheet can be adhered and fixed to the cover, which can increase the yield and avoid the deviation of the sealing sheet, which may cause the problem of oil leakage.

Therefore, this creation is very progressive and meets the requirements for applying for a patent for invention. I filed an application in accordance with the law and prayed that the Bureau would grant the patent as soon as possible.

The creation has been described in detail above, but the above is only a preferred embodiment of the creation, and the scope of implementation of the creation cannot be limited. That is to say, all equal changes and modifications made within the scope of this creative application should still fall within the scope of this patent.

Knowing 1‧‧‧Telescopic yoke 2‧‧‧Transmission rod 3‧‧‧Connecting yoke 4‧‧‧First yoke hole 5‧‧‧Second yoke hole 6‧‧‧Sliding shaft hole 7‧‧‧Capping book Creation 10‧‧‧Telescopic yoke 11‧‧‧Bar body 12‧‧‧Depression 13‧‧‧Bottom surface 14‧‧‧Annular groove 15‧‧‧Sliding shaft hole 20‧‧‧Sealing piece 30‧‧‧ Seal Cover 40 ‧‧‧ Stamping die 50‧‧‧ Grease 60‧‧‧ Gearbox shaft

FIG. 1 is a schematic structural view of a conventional telescopic yoke. Figure 2 is a schematic exploded view of the creative structure. Figure 3 is a schematic cross-sectional view of the creative structure. Fig. 4A is a flow chart 1 of this creation and manufacturing. Figure 4B, the second flow chart for this creation and manufacturing. Figure 4C is the third flowchart of this creative manufacturing. Figure 5 is a schematic diagram of this creative implementation.

10‧‧‧Telescopic yoke

11‧‧‧Bar

12‧‧‧Depression

13‧‧‧Bottom

14‧‧‧Annular groove

15‧‧‧sliding shaft hole

20‧‧‧Seal

30‧‧‧Cap

Claims (7)

A telescopic yoke cover structure includes: a telescopic yoke having a rod body, an end surface of the rod body has a recessed portion, the recessed portion has a bottom surface, and the wall surface of the recessed portion contacts the bottom surface At the point, a ring-shaped groove is formed inwardly, and a sliding shaft hole penetrating the rod body is formed on the bottom surface; a sealing piece is placed on the bottom surface; and a cover is formed, the cover is Spherical shell shape, and the shape and size of the edge of the cover correspond to the annular groove, and the cover is fixed in a manner that the center is depressed downward and the edge of the cover is forced into the annular groove, and faces downward The sealing sheet is pressed to contact the bottom surface to close the sliding shaft hole. The telescopic yoke cover structure as described in item 1 of the patent application scope, wherein the cross section of the annular groove is triangular. The retractable yoke cover structure as described in item 1 of the patent application scope, wherein the sealing piece is adhered and fixed on the cover. A manufacturing method of a telescopic yoke cover structure, the steps include: a preparation procedure for providing a telescopic yoke, a sealing sheet and a cover, the telescopic yoke has a rod body, and the end surface of the rod body has A recessed portion, the recessed portion has a bottom surface, the wall surface of the recessed portion is retracted inwardly to form an annular groove where the bottom surface contacts, and the bottom surface is provided with a sliding shaft hole penetrating the rod body, and the The cover is in the shape of a spherical shell, and the shape and size of the edge of the cover correspond to the annular groove; an assembly process is to first place the sealing sheet on the bottom surface, and then let the cover face down Covering the sealing sheet and the edge of the cover contacting the annular groove; and a punching process for punching the center of the cover downward and permanently deforming so that the edge of the cover is forced into the ring While the cover is pressed down to press the sealing piece into contact with the bottom surface to close the sliding shaft hole. The method for manufacturing a telescopic yoke cover structure as described in item 4 of the patent application scope, wherein the cross section of the annular groove is triangular. The method for manufacturing a retractable yoke cover structure as described in item 4 of the patent application scope, wherein the sealing sheet is directly adhered and fixed on the cover, and the sealing sheet and the cover are placed together during the assembly procedure On the bottom surface. The method for manufacturing a retractable yoke cover structure as described in item 4 of the patent application scope, wherein the stamping procedure is to use a stamping die to press the center of the cover.

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