Oil seal with oil return line

Abstract

The utility model discloses an oil seal with an oil return line, and relates to the technical field of oil seals, the oil seal comprises an iron shell framework and a rubber framework, the rubber framework comprises an iron shell support and a clamping support which are connected, and an iron shell clamping groove used for installing the iron shell framework is formed in the upper end, connected with the clamping support, of the iron shell support. The lower portion of the side, away from the iron shell support, of the clamping support is provided with a plurality of rubber auxiliary lips, the upper portion of the side, away from the iron shell support, of the clamping support is provided with a rubber main lip, the rubber main lip is provided with a wave oil line, and the upper portion of the side, close to the iron shell support, of the clamping support is provided with a spring clamping groove. A spring is clamped in the spring clamping groove; the wavy oil lines distributed in the staggered mode form a series of sealing areas, the oil return lines in two directions play a role in each sealing area, the sealing reliability is greatly improved, and the service life of the oil seal is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil seal technical field, concretely relates to an oil seal with oil return line. BACKGROUND

[0002] At present, the general bidirectional oil return line structure oil seal structure is composed of framework, rubber lip and compression spring, and the oil return line structure is eight-shaped, wave-shaped or circular structure; due to the limitation of structure, the rubber lip is generally the structure of mould self-bearing type, and the sharpness of the rubber lip is poor, which seriously affects the sealing effect of the rotating shaft needing bidirectional rotation and the service life of the oil seal, and simultaneously, since the rubber lip is the structure of mould self-bearing, the product realization is poor, and the industrial production capacity is poor.

[0003] The prior art patent no. 98236241.2, the utility model patent specification discloses a kind of dynamic rotary oil seal with bidirectional oil return line, which is composed of framework, rubber, spring, sealing lip and "eight" type oil return line uniformly arranged on the circumference of sealing lip, the cross section of oil return line is triangular or quadrilateral, the oil seal oil return line structure is complex, and it is inconvenient to process and produce, and the service life is short. UTILITY MODEL CONTENT

[0004] The utility model aims at providing an oil seal with oil return line, solving the technical problems of low reliability and short service life of oil seal.

[0005] The utility model can be realized by the following technical scheme:

[0006] An oil seal with oil return line, comprising an iron shell framework and a rubber framework, the rubber framework comprises an iron shell support and a clamping support connected, the upper end of the iron shell support and the clamping support is provided with an iron shell clamping groove for mounting the iron shell framework, the lower part of the side of the clamping support away from the iron shell support is provided with a plurality of rubber sub-lips, the upper part of the side of the clamping support away from the iron shell support is provided with a rubber main lip, the rubber main lip is provided with a wave-shaped oil line, the upper part of the side of the clamping support close to the iron shell support is provided with a spring clamping groove, and the spring clamping groove is clamped with a spring.

[0007] Preferably, the iron shell framework comprises a clamping iron shell clamped in the iron shell clamping groove, and the side of the clamping iron shell is provided with a support framework clamped with the upper end of the iron shell support.

[0008] Preferably, the side of the clamping iron shell away from the support framework is provided with an iron shell plug, and the clamping support is provided with an iron shell clamping lug matched with the iron shell plug.

[0009] Preferably, the groove bottom of the iron shell clamping groove is provided with a plurality of framework through grooves, and the plurality of framework through grooves are arranged in a ring array.

[0010] Preferably, the upper end of the clamping bracket is provided with a spring guard ear for clamping the spring.

[0011] Preferably, the wave oil line is provided with two wave oil lines which are staggered and intersected.

[0012] The present application has the following beneficial effects:

[0013] (1) The staggered wave oil lines form a series of sealing areas, and two direction oil return lines in each sealing area play a role, which greatly improves the sealing reliability and service life of the oil seal.

[0014] (2) The cooperation of the iron shell clamping ear and the iron shell plug ensures the stability of the cooperation and connection between the iron shell framework and the rubber framework, and the spring guard ear improves the stability of the clamping spring installation, thereby ensuring the overall strength of the entire oil seal assembly. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in combination with the drawings.

[0016] Figure 1 is the overall structural schematic diagram of the present application;

[0017] Figure 2 is the structural schematic diagram of the iron shell framework of the present application;

[0018] Figure 3 is the structural schematic diagram of the rubber framework of the present application;

[0019] Figure 4 is the structural schematic diagram of the wave oil line of the present application.

[0020] In the figure: 10, iron shell framework; 11, clamping iron shell; 12, iron shell plug; 13, supporting framework; 20, rubber framework; 21, iron shell bracket; 22, clamping bracket; 23, iron shell clamping groove; 24, iron shell clamping ear; 25, rubber auxiliary lip; 26, rubber main lip; 27, spring clamping groove; 28, spring guard ear; 29, framework through groove; 261, wave oil line; 30, spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1-4As shown, the utility model is a kind of oil seal with oil return line, including iron shell skeleton 10 and rubber skeleton 20, the rubber skeleton 20 includes the iron shell support 21 and the clamping support 22 connected, the upper end of iron shell support 21 and clamping support 22 is provided with the iron shell clamping groove 23 for installing iron shell skeleton 10, the lower part of the side of clamping support 22 away from iron shell support 21 is provided with multiple rubber auxiliary lips 25, the upper part of the side of clamping support 22 away from iron shell support 21 is provided with rubber main lip 26, the rubber main lip 26 is provided with wave oil line 261, the upper part of the side of clamping support 22 close to iron shell support 21 is provided with spring clamping groove 27, spring 30 is clamped in spring clamping groove 27.

[0023] In an alternative embodiment, the iron shell skeleton 10 includes a clamping iron shell 11 clamped at the iron shell clamping groove 23, and the clamping iron shell 11 is provided with a support skeleton 13 clamped at the upper end of the iron shell support 21.

[0024] It should be noted that by clamping the clamping iron shell 11 between the iron shell support 21 and the clamping support 22, the support of the rubber skeleton 20 is ensured to improve the overall strength of the entire oil seal.

[0025] In an alternative embodiment, the clamping iron shell 11 is provided with an iron shell plug 12 away from the support skeleton 13, and the clamping support 22 is provided with an iron shell clamping lug 24 matched with the iron shell plug 12.

[0026] It should be noted that the matching of the iron shell clamping lug 24 and the iron shell plug 12 ensures the stability of the matching connection between the iron shell skeleton 10 and the rubber skeleton 20.

[0027] In an alternative embodiment, the groove bottom of the iron shell clamping groove 23 is provided with a plurality of skeleton through grooves 29, and the plurality of skeleton through grooves 29 are arranged in a ring array.

[0028] It should be noted that the setting of the skeleton through groove 29 plays a regulating role in the installation of the iron shell skeleton 10.

[0029] In an alternative embodiment, the upper end of the clamping support 22 is provided with a spring guard ear 28 for clamping the spring 30.

[0030] It should be noted that the setting of the spring guard ear 28 improves the stability of the installation of the clamping spring 30, thereby ensuring the overall strength of the entire oil seal assembly.

[0031] In an alternative embodiment, the wave oil line 261 is provided with two wave oil lines 261, and the two wave oil lines 261 are staggered and intersected.

[0032] It should be noted that the staggered distribution of the wave oil line 261 forms a series of sealed areas, and each sealed area has two direction oil return lines, which greatly improves the sealing reliability and the service life of the oil seal.

[0033] The working principle of the utility model is as follows: firstly, the spring 30 is sleeved on the upper end of the rubber framework 20, then the spring 30 is pressed downward to be clamped into the spring clamping groove 27, the spring 30 is clamped by the spring protection lug 28, the clamping iron shell 11 is inserted into the iron shell clamping groove 23, the iron shell plug 12 is inserted into the lower end of the iron shell clamping lug 24 to be fixed and clamped, and the assembly of the oil seal is completed.

[0034] The above describes one embodiment of the utility model in detail, but the content described is only the preferred embodiment of the utility model, and cannot be considered as limiting the implementation range of the utility model. Any equivalent change and improvement within the application range of the utility model should still belong to the patent coverage range of the utility model.

Claims

1. An oil seal with an oil return line, characterized by, The application relates to a rubber skeleton (20) comprising an iron shell skeleton (10) and an iron shell skeleton (20), wherein the iron shell skeleton (20) comprises connected iron shell supports (21) and clamping supports (22), the upper ends of the iron shell supports (21) and the clamping supports (22) are provided with iron shell clamping grooves (23) for mounting the iron shell skeleton (10), the lower parts of the sides, away from the iron shell supports (21), of the clamping supports (22) are provided with a plurality of rubber auxiliary lips (25), the upper parts of the sides, away from the iron shell supports (21), of the clamping supports (22) are provided with rubber main lips (26), the rubber main lips (26) are provided with wave oil lines (261), the upper parts of the sides, close to the iron shell supports (21), of the clamping supports (22) are provided with spring clamping grooves (27), and springs (30) are clamped in the spring clamping grooves (27).

2. An oil seal with oil return line according to claim 1, characterized in that The iron shell skeleton (10) comprises clamped iron shell supports (11) clamped in the iron shell clamping grooves (23), and the sides of the clamped iron shell supports (11) are provided with support skeletons (13) clamped with the upper ends of the iron shell supports (21).

3. An oil seal with oil return line according to claim 2, wherein The sides, away from the support skeletons (13), of the clamped iron shell supports (11) are provided with iron shell plugs (12), and the clamping supports (22) are provided with iron shell clamping ears (24) matched with the iron shell plugs (12).

4. An oil seal with oil return line as claimed in claim 1, wherein, The groove bottoms of the iron shell clamping grooves (23) are provided with a plurality of skeleton through grooves (29) arranged in a ring shape.

5. An oil seal with oil return line as claimed in claim 1, wherein, The upper ends of the clamping supports (22) are provided with spring protection ears (28) for clamping the springs (30).

6. An oil seal with oil return line as claimed in claim 1, wherein, The wave oil lines (261) are provided with two wave oil lines (261) staggered and intersected.

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