Novel anti-inclination piston rod oil seal

Abstract

The utility model relates to the technical field of oil seals, and discloses a novel inclination-preventing piston rod oil seal which comprises a main lip (1) and an auxiliary lip (2), one end of the main lip (1) is connected with one end of the auxiliary lip (2), the other end of the main lip (1) is U-shaped, an auxiliary supporting lip (4) is arranged on the auxiliary lip (2), and the auxiliary supporting lip (4) inclines towards one side of the main lip (1). According to the novel inclination-preventing piston rod oil seal, the main supporting lip and the auxiliary supporting lip are arranged on the inner wall of the root of the lower portion of the main lip and the auxiliary lip, so that the possibility that the oil seal inclines and shakes in the reciprocating motion process is reduced, and the service life of a product is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal technical field, concretely relates to a novel prevent tilting piston rod oil seal. BACKGROUND

[0002] The conventional piston rod oil seal works as follows: when the piston rod oil seal is installed in the cylinder groove, the interference between the main lip and the auxiliary lip generates the tension. When there is no internal pressure, only the small contact pressure is generated due to the extrusion deformation of the lip tip. After the hydraulic oil enters the oil cylinder, the circumferential pressure is generated in the U-shaped groove, so the bottom of the oil seal is axially compressed, the lip is circumferentially compressed, the contact with the sealing surface is widened, and the contact stress is increased. When the internal pressure P is further increased, the distribution and size of the contact pressure are further changed, the lip is more closely matched with the sealing surface, and the sealing performance is better. This is the "self-sealing effect" of the oil seal. Since there is a gap between the oil seal and the groove after the assembly, as shown in the Y-shaped thermoplastic polyurethane hydraulic sealing ring structure of the application No. 200920262010.7, the oil seal is prone to tilting and shaking during the reciprocating motion under high pressure, which affects the sealing effect and reduces the service life of the oil seal. Figure 1 UTILITY MODEL CONTENT

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a novel prevent tilting piston rod oil seal, which reduces the possibility of tilting and shaking of the oil seal during the reciprocating motion and improves the service life of the product.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A novel prevent tilting piston rod oil seal, comprising a main lip and an auxiliary lip, one end of the main lip and the auxiliary lip is connected, and the other end is provided in a U-shaped form, a auxiliary support lip is arranged on the auxiliary lip, and the auxiliary support lip is provided in a tilting form towards the main lip side.

[0006] As a preferred, the main lip and the auxiliary lip form a lip opening, and the lip opening is in a U-shaped form.

[0007] As a preferred, the auxiliary lip is higher than the main lip, the auxiliary support lip extends out of the upper plane of the oil seal and is located on the outer side of the oil seal.

[0008] As a preferred, the main lip is provided with a main support lip, and the main support lip is located on the inner side of the oil seal.

[0009] As a preferred, the main support lip is located at the root of the main lip and the auxiliary lip.

[0010] As a preferred, the main lip and the auxiliary lip are separated from each other and are provided in a tilting form towards the inner side of the oil seal.​

[0011] Preferably, the main lip end is provided with a main lip chamfer, which is located on the inner side of the oil seal.

[0012] Preferably, the sub-lip is inclined to the outer side of the oil seal at a position separated from the main lip.

[0013] Preferably, the sub-lip end is provided with a sub-lip chamfer, which is located on the outer side of the oil seal.

[0014] Preferably, an inner support lip is provided above the lip, which is located on the sub-lip, and the main lip is provided with an inner groove corresponding to the inner support lip.

[0015] Compared with the prior art, the oil seal has the following beneficial effects:

[0016] The oil seal can reduce the possibility of tilting and shaking during reciprocating movement of the oil seal, increase the sealing surface and the support force of the oil seal root, improve the sealing performance, and prolong the service life of the product. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic view of an existing oil seal in a cylinder.

[0018] Figure 2 FIG. 2 is a structural schematic view of the oil seal of the present application.

[0019] Figure 3 FIG. 3 is a top view of the oil seal of the present application.

[0020] Figure 4 FIG. 4 is a sectional view of the oil seal of the present application.

[0021] Figure 5 FIG. 5 is a structural schematic view of the oil seal of the present application in a cylinder.

[0022] Figure 6 FIG. 6 is a sectional view of the oil seal with an inner support lip and an inner groove in the present application.

[0023] In the drawings: 1-main lip, 11-main lip chamfer, 2-sub-lip, 21-sub-lip chamfer, 3-main support lip, 4-sub-support lip, 5-lip, 51-inner support lip, 52-inner groove, 6-cylinder barrel, 7-groove, 8-piston rod. DETAILED DESCRIPTION

[0024] Example 1: Referring to FIGS. 1-6 Figures 2-5The utility model provides a novel prevent tilting piston rod oil seal, including main lip 1 and vice lip 2, one end of main lip 1 and vice lip 2 is connected, and the other end is set up in U shape, be equipped with vice support lip 4 on vice lip 2, vice support lip 4 is set up to the one side of main lip 1 inclination, the lip 1 of main lip 1 and vice lip 2 between form lip 5, and this lip 5 is U shape.

[0025] Vice lip 2 is higher than main lip 1, and vice support lip 4 extends out of the upper plane of oil seal and is located the outside of oil seal, the inner wall of main lip 1 is equipped with main support lip 3, and main support lip 3 is located the inside of oil seal, main support lip 3 is located the root of main lip 1 and vice lip 2 connection, the separation end of main lip 1 and vice lip 2 is inclined to the inside of oil seal.

[0026] The novel oil seal compared to the oil seal of prior art increases two support lips, can improve sealing effect under the premise of providing support for oil seal, and the sealing effect of the oil seal is better than that of the prior art. Figure 5 Vice support lip 4 and the upper plane of groove 7 are closely combined without gap, and main support lip 3 is closely combined with piston rod 8, when the internal pressure P rises, the piston rod 8 reciprocates, the main support lip 3 provides support for the root of the oil seal, the vice support lip 3 provides support for the upper plane of the oil seal and the main lip 1, prevents the oil seal from tilting and shaking, the lip edge is more closely combined with the sealing surface, and the sealing property is better.

[0027] Embodiment 2: the utility model provides a novel prevent tilting piston rod oil seal, and the difference only in that the main lip 1 end is equipped with main lip chamfer 11, and the main lip chamfer 11 is located the inside of oil seal, the separation end of vice lip 2 and main lip 1 is inclined to the outside of oil seal to improve the sealing property of oil seal.

[0028] Embodiment 3: the utility model provides a novel prevent tilting piston rod oil seal, and the difference only in that the lip 5 top is equipped with inner support lip 51, and the inner support lip 51 is located vice lip 2, and the main lip 1 is equipped with inner recess 52 corresponding to inner support lip 51, the oil seal increases an inner support lip 51 in the lip 5, and the inner support lip 51 is closely combined with the inner recess 52, and the lip 5 both sides are more closely combined, and the sealing property is better.

[0029] The above only is the specific embodiment of the utility model, but the technical features of the utility model are not limited to this, and any person skilled in the art makes the change or modification in the field of the utility model, and is covered in the patent range of the utility model.

Claims

1. A novel anti-tilt piston rod oil seal comprising a primary lip (1) and a secondary lip (2), characterized in that, The main lip (1) is connected with one end of the auxiliary lip (2), and the other end is provided in a U-shaped manner, the auxiliary lip (2) is provided with an auxiliary supporting lip (4), and the auxiliary supporting lip (4) is provided in an inclined manner towards the main lip (1).

2. A novel anti-tilt piston rod oil seal according to claim 1, characterized in that, The main lip (1) and the auxiliary lip (2) form a lip opening (5), and the lip opening (5) is U-shaped.

3. A novel anti-tilt piston rod oil seal according to claim 2, characterized in that, The auxiliary lip (2) is higher than the main lip (1), the auxiliary supporting lip (4) extends out of the upper plane of the oil seal and is located on the outer side of the oil seal.

4. A novel anti-tilt piston rod oil seal according to claim 2, characterized in that, The inner wall of the main lip (1) is provided with a main supporting lip (3), and the main supporting lip (3) is located on the inner side of the oil seal.

5. A novel anti-tilt piston rod oil seal according to claim 4, characterized in that, The main supporting lip (3) is located at the root of the main lip (1) and the auxiliary lip (2).

6. A novel anti-tilt piston rod oil seal according to claim 2, wherein The separated end of the main lip (1) and the auxiliary lip (2) is inclined to the inner side of the oil seal.

7. A novel anti-tilt piston rod oil seal according to claim 6, characterized in that The end of the main lip (1) is provided with a main lip chamfer (11), and the main lip chamfer (11) is located on the inner side of the oil seal.

8. A novel anti-tilt piston rod oil seal according to claim 2, wherein The separated end of the auxiliary lip (2) and the main lip (1) is inclined to the outer side of the oil seal.

9. A novel anti-tilt piston rod oil seal according to claim 8, characterized in that, The end of the auxiliary lip (2) is provided with an auxiliary lip chamfer (21), and the auxiliary lip chamfer (21) is located on the outer side of the oil seal.

10. A novel anti-tilt piston rod oil seal according to any one of claims 2-9, characterized in that, An inner supporting lip (51) is arranged above the lip opening (5), the inner supporting lip (51) is located on the auxiliary lip (2), and a corresponding inner groove (52) is arranged on the main lip (1).

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