Sealing structure for box closing surface of gearbox body

Abstract

The utility model discloses a sealing structure of a box closing surface of a gearbox body, which belongs to the technical field of gearbox bodies, and comprises a sealing ring, a sealing ring, a first sealing ring and a second sealing ring, the sealing groove is formed in the second shell; when the first shell and the second shell are spliced together through a bolt, the sealing ring can be inserted into the sealing groove, and an elastic part arranged on the sealing ring is movably connected with the sealing groove in a clamped mode to achieve sealing. The elastic part comprises an elastic ring, the elastic ring is fixedly connected to the sealing ring, and when the sealing ring is inserted into the sealing groove, the end, away from the first shell, of the elastic ring abuts against the groove wall of the sealing groove and is movably connected with the groove wall of the sealing groove in a clamped mode. Vibration and thermal expansion and cold contraction are effectively dealt with, meanwhile, it can be ensured that the sealing face can still keep tight contact after being abraded, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox box body technical field, concretely relates to a sealing structure of gearbox box body joint box face. BACKGROUND

[0002] The sealing property of the gearbox box is the core element of guaranteeing normal operation and prolonging service life, good sealing property can prevent lubricating oil leakage, and prevents the impurities such as dust, water vapor of outside from entering the gearbox inside, avoids the abrasion of key components such as gear, bearing due to pollution or lubrication deficiency, the sealing structure of the joint box face of the gearbox box of the prior art is mostly single sealing pad or rigidly inlaid design, single sealing layer is easy to produce gap under the working condition such as vibration, thermal deformation, leads to oil leakage, and rigid sealing structure is high in requirement to the machining precision of shell, if the alignment deviation is big when jointing, it is easy to cause the deformation or sealing failure of sealing element, in addition, the sealing structure of most of the prior art is difficult to compensate the abrasion or deformation of sealing face in long-term use, and the sealing performance drops with use time, in order to solve the above problems, the utility model provides a sealing structure of gearbox box joint box face. SUMMARY

[0003] In view of the above technical deficiencies, the utility model aims at providing a sealing structure of gearbox box joint box face, which continuously applies self-adaptive compression force by the setting of the elastic ring and the clamping groove combined with the inclined pressing force of the pressing ring, effectively deals with vibration and thermal expansion and contraction, and can also ensure that the sealing surface still maintains close contact after wear, prolonging the service life.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the utility model provides a sealing structure of gearbox box joint box face, which comprises:

[0005] A sealing ring is fixedly connected to the first shell;

[0006] A sealing groove is arranged on the second shell;

[0007] When the first shell and the second shell are spliced together by bolts, the sealing ring is inserted into the inside of the sealing groove, and the elastic part provided on the sealing ring is movably clamped with the sealing groove to realize sealing.

[0008] Preferably, the elastic part comprises an elastic ring, which is fixedly connected to the sealing ring, and when the sealing ring is inserted into the inside of the sealing groove, the end of the elastic ring away from the first shell abuts against the groove wall of the sealing groove and is movably clamped with the groove wall of the sealing groove.

[0009] Preferably, the number of the elastic rings is two, and they are respectively located on the two sides of the sealing ring.

[0010] Preferably, a clamping groove is arranged on the groove wall of the sealing groove and is clamped with the elastic ring, and the depth of the clamping groove is matched with the thickness of the elastic ring.

[0011] Preferably, the end of the elastic ring away from the first shell is folded towards the direction away from the sealing ring to form a circular arc shape.

[0012] Preferably, the two sides of the end of the sealing ring away from the first shell are wedge-shaped surfaces.

[0013] Preferably, a groove is arranged on the end surface of the sealing ring away from the first shell, and a plug ring is fixedly connected with the groove on the groove bottom side wall of the sealing groove, the thickness of the plug ring is greater than the width of the groove, and the end of the plug ring away from the groove bottom side wall of the sealing groove is a wedge-shaped surface.

[0014] Preferably, the two sides of the plug ring and the two sides of the sealing groove are fixedly connected with a pressing ring for pressing the folded end of the elastic ring.

[0015] Preferably, the pressing ring is in an inclined state and has a pressing force for pressing the folded end of the elastic ring towards the end wall of the sealing groove close to the clamping groove.

[0016] Preferably, the cross section of the sealing ring is in a stepped shape, the thickness of the end close to the first shell is matched with the width of the sealing groove, and the thickness of the other end is less than the width of the sealing groove.

[0017] The utility model discloses the beneficial effect lies in:

[0018] The utility model discloses the clamping of the clamping groove in the sealing groove through the elastic ring of the symmetrical arrangement of the two sides of the sealing ring, and the interference fit of the plug ring and the groove forms a multistage sealing barrier. The inclined design of the circular arc folded end of the elastic ring and the pressing ring further enhances the self-adapting pressing force of the sealing surface, which can effectively cope with complex working conditions such as vibration, thermal expansion and cold shrinkage, and reduce the risk of leakage.

[0019] The wedge-shaped end surface of the sealing ring and the wedge-shaped end surface of the plug ring form a guide structure, which cooperates with the stepped cross section design to automatically correct the alignment deviation when the shell is assembled, thereby improving the assembly efficiency. DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0021] Figure 1The utility model provides a kind of sealing structure of gearbox body jointing face for the structure schematic view of embodiment of the utility model.

[0022] Figure 2 The utility model provides a plan view.

[0023] Figure 3 The utility model provides Figure 2 A-A section view.

[0024] Figure 4 The utility model provides Figure 3 A place enlarged view.

[0025] Figure 5 It is the explosion drawing of first shell and second shell of the utility model.

[0026] Figure 6 It is the explosion drawing of sealing ring, elastic ring and insert ring of the utility model.

[0027] Mark explanation:

[0028] 1, sealing ring, 2, first shell, 3, sealing groove, 4, second shell, 5, elastic ring, 6, clamping groove, 7, recess, 8, insert ring, 9, abutting ring. Specific implementation

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the scope of protection of the utility model.

[0030] The utility model provides a kind of sealing structure of gearbox body jointing face, as Figures 1 to 6 Shown.

[0031] Embodiment one:

[0032] The utility model provides a kind of sealing structure of gearbox body jointing face, including sealing ring 1 and sealing groove 3, sealing ring 1 is fixedly connected in the edge of the jointing face of first shell 2, sealing groove 3 is located on the jointing face of second shell 4, and is compatible with sealing ring 1, first shell 2 and second shell 4 are mutually spliced by bolt and form the body of gearbox, when first shell 2 and second shell 4 splice together, sealing ring 1 will be inserted into the inside of sealing groove 3, at this time, the elastic part with sealing ring 1 is movably connected with sealing groove 3 and realizes sealing.

[0033] The elastic part comprises two elastic rings 5, which are respectively arranged on two sides of the sealing ring 1. When the sealing ring 1 is inserted into the sealing groove 3, the end of the elastic ring 5 away from the first shell 2 abuts against the groove wall of the sealing groove 3 and is movably clamped in the clamping groove 6 on the groove wall of the sealing groove 3.

[0034] The end of the elastic ring 5 away from the first shell 2 is folded in a circular arc shape towards the direction away from the sealing ring 1. When the first shell 2 and the second shell 4 are spliced by bolts, the sealing ring 1 is inserted into the sealing groove 3, the folded end of the elastic ring 5 is expanded outward under the elastic force of the elastic ring 5 and clamped into the inside of the clamping groove 6, the depth of the clamping groove 6 is matched with the thickness of the elastic ring 5, and after the folded end of the elastic ring 5 is clamped into the inside of the clamping groove 6, the elastic ring 5 is flush with the groove wall of the sealing groove 3. At this time, even if impurities in the outside world penetrate into the inside of the sealing groove 3, the impurities will be gathered by the arc shape of the elastic ring 5, thereby improving the sealing performance.

[0035] In addition, the elastic ring 5 is formed in a circular arc shape, which reduces the frictional resistance when being inserted into the sealing groove 3, and at the same time, the contact area with the clamping groove 6 is increased, thereby further improving the sealing performance between the elastic ring 5 and the clamping groove 6.

[0036] Embodiment two:

[0037] The end face of the sealing ring 1 away from the first shell 2 is provided with a groove 7, the groove bottom side wall of the sealing groove 3 is fixedly connected with an insertion ring 8, the thickness of the insertion ring 8 is greater than the width of the groove 7, and the end of the insertion ring 8 away from the groove bottom of the sealing groove 3 is a wedge-shaped surface which is inwardly recessed. When the first shell 2 and the second shell 4 are spliced, the insertion ring 8 can be squeezed into the inside of the groove 7, which not only can form a sealing fit, but also can make the elastic ring 5 further abut against the clamping groove 6, thereby improving the sealing performance between the elastic ring 5 and the clamping groove 6.

[0038] The two sides of the insertion ring 8 are fixedly connected with inclined abutting rings 9, the ends of the two abutting rings 9 away from the groove bottom side wall of the sealing groove 3 are inclined towards the direction away from each other. When the first shell 2 and the second shell 4 are spliced, the end of the abutting ring 9 away from the groove bottom side wall of the sealing groove 3 abuts against the folded end of the circular arc shape of the elastic ring 5. Since the abutting ring 9 is designed to be inclined, the lateral force exerted by the abutting ring 9 can press the folded end of the elastic ring 5 towards the side of the clamping groove 6 close to the groove opening, thereby further compensating the gap caused by vibration or thermal deformation, and improving the sealing performance between the elastic ring 5 and the clamping groove 6.

[0039] Embodiment three:

[0040] On the basis of embodiment two, in order to facilitate assembly, the cross-sectional shape of the sealing ring 1 is designed to be a stepped shape. The thickness of the end of the sealing ring 1 close to the first shell 2 is matched with the width of the sealing groove 3, the thickness of the middle part is less than the width of the sealing groove 3, and the end of the sealing ring 1 away from the first shell 2 is a wedge-shaped surface which is inwardly recessed. The wedge-shaped surface can form a self-guiding structure with the opening of the sealing groove 3, and can better complete the assembly work.

[0041] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A sealing structure of a housing closing surface of a transmission housing, characterized by, The utility model relates to a sealing ring (1) is fixedly connected on the first shell (2), and the sealing groove (3) is equipped with the second shell (4), and the first shell (2) and the second shell (4) are spliced together through bolt, and the sealing ring (1) is inserted in the inside of sealing groove (3), and the elastic part of sealing ring (1) is movably connected with sealing groove (3) and realizes sealing. The elastic part includes a spring ring (5) fixedly connected to the sealing ring (1), and when the sealing ring (1) is inserted into the sealing groove (3), the end of the spring ring (5) away from the first shell (2) abuts against the groove wall of the sealing groove (3) and movably connects with the groove wall of the sealing groove (3). The number of spring rings (5) is two, and they are located on both sides of the sealing ring (1). The groove wall of the sealing groove (3) is provided with a clamping groove (6) for clamping the spring ring (5), and the depth of the clamping groove (6) is matched with the thickness of the spring ring (5).

2. A sealing structure of a housing closing face of a transmission housing according to claim 1, characterized in that, The end of the spring ring (5) away from the first shell (2) is folded towards the direction away from the sealing ring (1) to form a circular arc shape.

3. A sealing structure of a housing closing face of a transmission housing according to claim 2, characterized in that, The end of the sealing ring (1) away from the first shell (2) is a wedge-shaped surface.

4. A sealing structure of a housing closing face of a transmission housing according to claim 3, characterized in that, The end surface of the sealing ring (1) away from the first shell (2) is provided with a groove (7), and the groove bottom side wall of the sealing groove (3) is fixedly connected with an insertion ring (8) inserted into the groove (7), the thickness of the insertion ring (8) is greater than the width of the groove (7), and the end of the insertion ring (8) away from the groove bottom side wall of the sealing groove (3) is a wedge-shaped surface.

5. A sealing structure of a housing closing face of a transmission housing according to claim 3, characterized in that, The two sides of the insertion ring (8) and the two sides of the sealing groove (3) are fixedly connected with a pressing ring (9) for pressing the folded end of the spring ring (5).

6. A sealing structure for a housing face of a gearbox housing according to claim 5, characterized in that The pressing ring (9) is in an inclined state, and has a pressing force for pressing the folded end of the spring ring (5) towards the end groove wall of the sealing groove (3) close to the groove opening of the clamping groove (6).

7. A sealing structure for a housing face of a gearbox housing according to claim 6, characterized in that The cross section of the sealing ring (1) is in a stepped shape, the thickness of the end close to the first shell (2) is matched with the width of the sealing groove (3), and the thickness of the other end is smaller than the width of the sealing groove (3).

8. A sealing structure for a housing face of a gearbox housing according to claim 7, characterized in that ​ 9. A sealing structure for a housing face of a gearbox housing according to claim 8, characterized in that ​ 10. A sealing structure of a housing closing face of a transmission housing according to claim 2, characterized by ​

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