Transmission shaft sealing structure

Abstract

The utility model belongs to the technical field of automobile transmission shafts, and particularly relates to a transmission shaft sealing structure. The transmission shaft sealing structure is good in sealing effect and reliable in connection. The sealing device comprises a transmission shaft and is characterized in that a sealing ring matched with the outer surface of the transmission shaft is arranged outside the transmission shaft, a shaft sleeve is arranged outside the sealing ring, a pressing edge is arranged at the upper end of the sealing ring, a sealing cover is arranged at the upper end of the shaft sleeve, and the sealing cover fixes the sealing ring at the end of the shaft sleeve through the pressing edge; and the sealing cover is matched with the outer contour of the transmission shaft.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile transmission shaft, specifically relates to a transmission shaft sealing structure. BACKGROUND

[0002] With the renewal of the automobile, the requirement of large commercial vehicle to comfort is higher and higher, and cab suspension system emerges as the times require, which means that the extension and reciprocating motion of transmission shaft are more frequent, thereby leading to the more easy foreign matter into the parts in the motion.

[0003] The automobile transmission shaft bears the effect of transmitting steering torque and connecting the steering column and the steering machine, and is a very important safety component, and once failure, the consequence is serious.

[0004] The existing transmission shaft sealing structure small gap cooperation has the blocking effect to the larger foreign matter, and the sealing effect of dust and liquid is poor.

[0005] More and more automobiles put forward higher requirements to transmission shaft, and from the quality improvement aspect, the improvement of sealing performance can effectively reduce the failure caused by foreign matter invasion. INVENTION CONTENTS

[0006] The utility model is just in view of above -mentioned problem, provide a kind of transmission shaft sealing structure with good sealing effect and reliable connection.

[0007] In order to realize the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme, the utility model includes transmission shaft, and its characterized in that: transmission shaft is provided with sealing ring matched with the outer surface of transmission shaft, the sealing ring is provided with shaft sleeve outside, the upper end of the sealing ring is provided with pressing edge, the upper end of the shaft sleeve is provided with sealing cover, and the sealing cover is fixed to the end of the shaft sleeve by the pressing edge of sealing ring;The sealing cover is matched with the outer contour of transmission shaft.

[0008] As a preferred scheme of the utility model, the sealing cover includes framework, and rubber layer is vulcanized outside the framework;The rubber layer is interference fitted with the shaft sleeve, and the rubber layer is interference fitted with the transmission shaft.

[0009] Further, the rubber layer is provided with double sealing lips corresponding to the transmission shaft, and a lubricating grease groove is arranged between the two sealing lips.

[0010] Further, the shaft sleeve is provided with a clamping groove, and the rubber layer is provided with a limiting clamp corresponding to the clamping groove.

[0011] As another preferred scheme of the utility model, the inner surface of the shaft sleeve is provided with an arc-shaped groove, the outer surface of the transmission shaft is also provided with an arc-shaped groove, and the inner side and the outer side of the sealing ring are both provided with protrusions corresponding to the arc-shaped grooves.

[0012] The utility model discloses a beneficial effect: the utility model discloses a double sealing structure through sealing cover and sealing ring, effectively promote the sealing performance of transmission shaft assembly, prevent dust, liquid and foreign matter from invading, reduce the failure risk. Sealing cover adopts the rubber structure of metal framework cladding, realizes firm installation through the snap groove and the limit card structure on the shaft sleeve and the interference fit mode;Sealing ring is the special-shaped structure, has the multiple functions such as foreign matter prevention, support limit and linkage restriction. The overall structure guarantees the sealing reliability, also gives consideration to the slippage demand of transmission shaft's axial movement, and has the redundancy working capacity when the sliding pair fails, guarantees low intensity working condition to continue using, significantly improves the reliability and durability of system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic diagram of the utility model.

[0014] Figure 2 It is the sectional view of the sealing cover of the utility model.

[0015] Figure 3 It is the three-dimensional structure schematic diagram of the utility model.

[0016] Figure 4 It is the sectional view of the sealing ring assembly of the utility model.

[0017] Figure 5 It is the structure schematic diagram of the sealing cover of the utility model.

[0018] Figure 6 It is the structure schematic diagram of the sealing ring of the utility model.

[0019] In the drawing, 1 is sealing cover, 2 is sealing ring, 3 is rubber layer, 4 is framework, 5 is transmission shaft, 6 is shaft sleeve. DETAILED DESCRIPTION

[0020] The utility model discloses a transmission shaft 5, transmission shaft 5 outside setting up with transmission shaft 5 outer surface cooperation sealing ring 2, sealing ring 2 outside setting up shaft sleeve 6, sealing ring 2 upper end sets up the edge pressure, the upper end of shaft sleeve 6 sets up sealing cover 1, and sealing cover 1 fixes sealing ring 2 in the end of shaft sleeve 6 through the edge pressure, sealing cover 1 cooperates with transmission shaft 5 outer contour.

[0021] Sealing cover 1 includes framework 4, and framework 4 is vulcanized and set up rubber layer 3 outside;Rubber layer 3 is interference fit with shaft sleeve 6, and rubber layer 3 is interference fit with transmission shaft 5. Through double interference fit, improve sealing strength and sealing reliability, and framework 4 enhances structural strength, guarantees long-term stable use.

[0022] The rubber layer 3 is provided with double sealing lips corresponding to the transmission shaft 5, and grease grooves are arranged between the two sealing lips.

[0023] The shaft sleeve 6 is provided with a clamping groove, and the rubber layer 3 is provided with a limiting clamp corresponding to the clamping groove.

[0024] The inner surface of the shaft sleeve 6 is provided with an arc-shaped groove, the outer surface of the transmission shaft 5 is also provided with an arc-shaped groove, and the inner side and the outer side of the sealing ring 2 are provided with protrusions corresponding to the arc-shaped grooves.

[0025] Embodiment: The utility model discloses a sealing cover 1 and a sealing ring 2, and the sealing cover 1 and the sealing ring 2 jointly act to realize sealing.

[0026] The sealing cover 1 is composed of two parts, one part is a rubber layer 3, and the other part is a framework 4.

[0027] The combination mode of the rubber layer 3 and the framework 4 is vulcanization.

[0028] The sealing cover 1 and the shaft sleeve 6 can be sealed by using a rotary riveting process, the end surface of the shaft sleeve 6 has a clamping groove structure, the limiting clamp of the sealing cover 1 can be embedded into the groove after rotary riveting, so that the sealing cover 1 and the shaft sleeve 6 are not separated; and the sealing cover 1 is wrapped with the rubber layer 3, and the rubber layer 3 is embedded into the groove together, so that the sealing function is realized.

[0029] The sealing cover 1 and the transmission shaft 5 are in interference fit mode, the sealing cover 1 is wrapped with the rubber layer 3, the shape of the rubber layer 3 at the matching position with the transmission shaft 5 is the same as that of the transmission shaft 5, and the size of the rubber layer 3 is slightly smaller than that of the transmission shaft 5, that is, the sealing is completed in a slightly interference fit mode; the sealing has the following characteristics: 1, the transmission shaft 5 can move axially along the sealing cover 1; 2, the sealing structure can be lubricated; 3, the axial reciprocating motion is carried out with low resistance, which meets the sealing requirement and does not excessively affect the extension and sliding force performance of the transmission shaft 5 assembly.

[0030] The sealing lip of the rubber layer 3 in contact with the transmission shaft 5 is a double-layer structure, and the inner part can store lubricating grease, so that the sealing performance is effectively improved.

[0031] As shown in Figure 1 The sealing ring 2 is a "T" type structure, the upper end is a pressing edge, and the pressing edge has a limiting effect to prevent it from falling into the inside of the shaft sleeve 6.

[0032] The sealing ring 2 has a raised structure at the lower end of its part, which contacts the drive shaft 5. The fit is an interference fit, which provides radial support to the drive shaft 5.

[0033] like Figure 4 As shown, the outer contour of the sealing ring 2 has two protrusions, which cooperate with the internal groove of the bushing 6 to restrict its axis rotation.

[0034] The inner contour of the sealing ring 2 has four protrusions, which cooperate with the grooves on the surface of the drive shaft 5 to restrict the rotation of its axis.

[0035] The sealing ring 2, through its inner and outer protrusions, can perform linkage restriction on the drive shaft 5 and the bushing 6, that is, when the sliding pair of the drive shaft 5 fails, it has the ability to continue to be used under low-intensity working conditions.

[0036] The sealing cap 1 of this utility model is the first seal, and the sealing ring 2 is the second seal, which improves the reliability of the sealing performance.

[0037] The sealing ring 2 is made of a high molecular polymer.

[0038] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A drive shaft sealing arrangement comprising a drive shaft (5), characterized by: Transmission shaft (5) outside is provided with sealing ring (2) matched with transmission shaft (5) outer surface, sealing ring (2) outside is provided with shaft sleeve (6), sealing ring (2) upper end is provided with pressing edge, shaft sleeve (6) upper end is provided with sealing cover (1), sealing cover (1) is fixed sealing ring (2) in shaft sleeve (6) end portion by pressing edge;The sealing cover (1) is matched with the outer contour of transmission shaft (5).

2. A driveshaft seal arrangement according to claim 1, wherein: The sealing cover (1) comprises a skeleton (4), and a rubber layer (3) is vulcanized outside the skeleton (4); the rubber layer (3) is in interference fit with the shaft sleeve (6), and the rubber layer (3) is in interference fit with the transmission shaft (5).

3. A driveshaft seal arrangement according to claim 2, wherein: The rubber layer (3) is provided with double sealing lips corresponding to the transmission shaft (5), and a lubricating grease groove is arranged between the two sealing lips.

4. A transmission shaft seal structure according to claim 2, wherein: The shaft sleeve (6) is provided with a clamping groove; the rubber layer (3) is provided with a limiting clamp corresponding to the clamping groove.

5. A transmission shaft seal structure according to claim 1, wherein: The inner surface of the shaft sleeve (6) is provided with an arc-shaped groove; the outer surface of the transmission shaft (5) is also provided with an arc-shaped groove; the inner side and the outer side of the sealing ring (2) are both provided with protrusions corresponding to the arc-shaped grooves.

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