Sealing assembly for universal joint for crossed shaft type universal shaft coupler

A technology for universal couplings and sealing components, which is applied in the direction of couplings, elastic couplings, mechanical equipment, etc., and can solve problems such as increased friction, increased sealing temperature, and vicious cycle at the lip

Inactive Publication Date: 2015-01-28

HENAN SANWEI HEAVY IND

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AI-Extracted Technical Summary

Problems solved by technology

Since the lip on the above-mentioned sealing body faces the inner ring of the needle bearing, the grease is thrown towards the bearing sleeve under the action of centrifugal force during the working process, and the lip of the inner ring ...

Method used

As shown in Figures 1, 2, and 3, the sealing assembly for the universal joint of the cross shaft type universal joint includes a seal 1 and a seal seat 2, and the outer side of the seal is provided with a main seal that is inclined relative to the seal. Sealing lip 3, secondary sealing lip 5, both sealing lips are inclined towards the left end face of the seal, the secondary sealing lip is located at the edge of the seal, the main sealing lip is 40°-50° to the axial direction of the seal °, the auxiliary sealing lip and the axial direction of the seal are at an angle of 25° to 30°, a U-shaped cavity 4 is formed between the main sealing lip and the auxiliary sealing lip, and the thickness of the main sealing lip is 0.8 to 1.5 mm, the thickness of the auxiliary sealing lip is 80% of the thickness of the main sealing lip; there is an annular groove on the outside of the sealing seat, the depth of the annular groove is 4-4.5mm, and the width and the width of the seal have a pre-tightening amount of 0.1-0.2 mm. The seal is installed on the seal seat through the annular groove on the seal seat to ensure that the seal and the seal seat are firmly combined and will not fall off during assembly and use.

The setting of main sealing lip, auxiliary sealing lip inclination angle is convenient for packing of seal, and main sealing lip is thicker than secondary...

Abstract

The invention discloses a sealing assembly for a universal joint for a crossed shaft type universal shaft coupler. The sealing assembly comprises a sealing element and a sealing seat, wherein the outer side of the sealing element is provided with a main sealing lip and a sub sealing lip which are inclined relative to the sealing element, the two sealing lips are respectively inclined in a direction towards the end part of the opening end of a bearing sleeve, the main sealing lip forms an angle being 40 degrees to 50 degrees with the axial direction of the sealing element, the sub sealing lip forms an angle being 25 degrees to 30 degrees with the axial direction of the sealing element, a U-shaped cavity is formed between the main sealing lip and the sub sealing lip, the thickness of the main sealing lip is 0.8 to 1.5mm, the thickness of the sub sealing lip is 80 percent of the thickness of the main sealing lip, the outer side of the sealing seat is provided with an annular groove, the depth of the annular groove is 4 to 4.5mm, the pre-tightening quantity being 0.1 to 0.2mm is realized between the width of the annular groove and the width of the sealing element, and the sealing element is arranged on the sealing seat through the annular groove formed in the sealing seat. The sealing assembly has the advantages that the sufficient lubrication of a sealing lip part can be realized, the abrasion can be reduced, and the in-site construction condition of the universal joint can be met.

Application Domain

Yielding coupling

Technology Topic

LubricationEngineering +1

Image

Examples

Experimental program(1)

Example Embodiment

[0018] The technical solutions of the present invention will be further described in detail below through the drawings and embodiments.

[0019] Such as figure 1 , 2 , 3, the cross-shaft universal joint universal joint seal assembly, which includes a seal 1 and a seal seat 2. The outer side of the seal is provided with a primary sealing lip 3 and a secondary sealing lip that are inclined relative to the seal Port 5, the two sealing lips are inclined towards the left end of the seal, the secondary sealing lip is located at the edge of the seal, the main sealing lip and the axial direction of the sealing are at an angle of 40°~50°, the secondary sealing lip It is at an angle of 25°~30° with the axial direction of the seal, a U-shaped cavity 4 is formed between the main sealing lip and the secondary sealing lip, the thickness of the primary sealing lip is 0.8~1.5mm, and the thickness of the secondary sealing lip 80% of the thickness of the main sealing lip; an annular groove is provided on the outside of the sealing seat, the depth of the annular groove is 4~4.5mm, and the width and the width of the sealing element have a preload of 0.1~0.2 mm. The sealing element passes through the ring on the sealing seat The groove is installed on the sealing seat to ensure that the sealing element and the sealing seat are firmly combined and will not fall off during assembly and use.

[0020] The pre-tightening amount a of the primary sealing lip, secondary sealing lip and bearing sleeve of the above-mentioned seal is 0.5-1.0mm, image 3 The R refers to the bore of the bearing sleeve.

[0021] The above-mentioned sealing element is made of polyurethane rubber, which has high mechanical strength, good elasticity, oil resistance and abrasion resistance, especially in terms of water resistance, which is greatly improved compared with traditional sealing elements.

[0022] The above-mentioned sealing seat is made of engineering plastic, which is PE or PP or ABS or PU, which has the characteristics of light weight, moderate toughness and strength, no corrosion, low price and easy processing.

[0023] by Figure 4 It can be seen that the primary sealing lip 3 and the secondary sealing lip 5 are both inclined toward the open end of the bearing sleeve 6, that is, the two sealing lips are inclined toward the root of the journal of the cross shaft 8.

[0024] In the above-mentioned improved seal for universal joint of the cross shaft type universal joint, the preload a of the main sealing lip 3, the auxiliary sealing lip 5 and the bearing sleeve 6 of the seal body is 0.5 to 1.0 mm, image 3 The R refers to the bore of the bearing sleeve.

[0025] The inclination angles of the main sealing lip and the auxiliary sealing lip are set to facilitate the installation of the seals. The main sealing lip is thicker than the auxiliary sealing lip, with high strength and large pre-tightening force, which plays the role of the main sealing; the thickness of the auxiliary sealing lip Thinner, low strength, small pre-tightening force and low friction resistance. It plays an auxiliary sealing role under the grease support in the U-shaped cavity between the main sealing lip and the auxiliary sealing lip; the main sealing lip and the auxiliary sealing lip The port mainly prevents external water, rust, oil and other impurities from entering the needle roller bearing. At the same time, the grease inside the needle roller bearing after a certain period of time contains a certain amount of particulate wear or impurities, which can pass through the grease under the oil pressure The main and auxiliary seal lip leaks and discharges to ensure that the grease in the needle roller bearing is updated.

PUM

Property	Measurement	Unit
Thickness	0.8 ~ 1.5	mm

Description & Claims & Application Information

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