CN211039621U - Sealed anti-disengaging structure and transmission of covering - Google Patents

Abstract

The application provides a sealed anti-disengaging structure of lid and transmission relates to differential technical field. This sealed anti-disengaging structure of lid includes differential side gear, sealed blanking cover and rand, and differential side gear has seted up first mounting hole and second mounting hole, and the second mounting hole is used for installing the transmission shaft, and sealed blanking cover and rand are all installed in first mounting hole, and the rand is located one side that sealed blanking cover kept away from the second mounting hole. The rand is used for restricting the axial position of sealing blanking cover, prevents that sealing blanking cover from droing from the side gear, improves side gear's leakproofness and structural reliability.

Description

Sealed anti-disengaging structure and transmission of covering

Technical Field

The utility model relates to a differential mechanism makes technical field, particularly, relates to a sealed lid anti-disengaging structure and transmission.

Background

The inventor has found that during the manufacturing process of the differential, when the transmission half shaft is installed, a sealing area is formed inside the side gear, and compressed high-pressure gas is formed in the sealing area. When differential operation of the differential gear occurs, the temperature of the side gear is increased, so that the air pressure in the sealing area is further increased, and when the air pressure is increased to a certain value, the sealing plug is flushed away, so that lubricating oil is leaked outwards.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sealed lid anti-disengaging structure, it is spacing to realize the axial of sealed blanking cover, prevents effectively that sealed blanking cover from being washed out, improves half axle gear's leakproofness for half axle gear moves more reliably.

An object of the utility model is to provide a transmission, it can prevent that sealed stifled lid from being washed to take off, improves the leakproofness of differential side gear structure.

The embodiment of the utility model is realized like this:

in a first aspect, the embodiment of the utility model provides a sealed lid anti-disengaging structure, including side gear, sealed blanking cover and rand, first mounting hole and second mounting hole have been seted up to side gear, the second mounting hole is used for installing the transmission shaft, sealed blanking cover with the rand is all installed in the first mounting hole, just the rand is located sealed blanking cover is kept away from one side of second mounting hole.

In an alternative embodiment, the sealing cap is an interference fit with the first mounting hole.

In an optional embodiment, the sealing plug cover comprises a body and a sealing layer arranged on the outer surface of the body, and the sealing layer is in interference fit with the first mounting hole.

In an alternative embodiment, the sealing layer is a rubber sleeve.

In an alternative embodiment, the inner surface of the first mounting hole is a cylindrical surface, and the outer surface of the sealing cap is a cylindrical surface.

In an optional embodiment, a clamping groove is formed in the first mounting hole, and the clamping ring is arranged in the clamping groove.

In an optional embodiment, the clamping groove is disposed on a side of the sealing blocking cover away from the second mounting hole, and the clamping ring abuts against the sealing blocking cover.

In a second aspect, an embodiment of the present invention provides a transmission device, including a transmission shaft and a sealing cover anti-disengaging structure as in any one of the foregoing embodiments, wherein the transmission shaft is disposed in the second mounting hole, and is in transmission connection with the side gear.

In an alternative embodiment, a seal is provided between the side gear and the drive shaft.

In an alternative embodiment, a sealing groove is provided in the second mounting hole, and the sealing element is mounted in the sealing groove.

The embodiment of the utility model provides a beneficial effect is:

the embodiment of the utility model provides a pair of sealed lid anti-disengaging structure has set up sealed blanking cover and rand simultaneously in first mounting hole, and the rand carries out the axial to sealed blanking cover spacing, prevents that sealed blanking cover from following axial roll-off differential side gear. This sealed lid anti-disengaging structure is simple, and processing manufacturing is convenient to installation, the assembly of sealed blanking cover and rand are also easy, can effectively restrict the axial displacement of sealed blanking cover, improve half axle gear's sealing performance, and then prolong half axle gear's life.

The embodiment of the utility model provides a pair of transmission, including transmission semi-axis and foretell sealed lid anti-disengaging structure, this transmission has good sealing performance, can effectively prevent sealed blanking cover's axial displacement. The transmission device is simple in structure, convenient to machine and manufacture, low in installation difficulty, high in assembly efficiency, good in sealing performance and high in practicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a sealing cover anti-disengaging structure provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a sealing cap of an anti-disengaging structure of a sealing cap according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a side gear of a sealing cover anti-disengaging structure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a transmission device according to an embodiment of the present invention.

Icon: 100-a sealing cover anti-falling structure; 110-side gear; 111-a first mounting hole; 113-a second mounting hole; 115-a card slot; 130-sealing a blocking cover; 131-a body; 132-a bottom wall; 133-annular sidewall; 135-a sealing layer; 136-bottom; 137-annular side portion; 150-a collar; 200-a transmission; 210-a drive shaft; 211-a first shaft section; 213-a second shaft section; 215-shoulder; 220-spline; 230-a seal; 240-dust cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

When the vehicle runs under the working conditions of turning, tire wear, inconsistent tire pressure or uneven running road surface and the like, the distance traveled by the left driving wheel and the right driving wheel in the same time is unequal, and the driving wheels can slip or rotate on the road surface under the condition. To prevent this, an inter-wheel differential is installed between the left and right drive wheels.

At present, a differential mechanism adopting self-sealing half axle gears is adopted, and an inner hole of the half axle gear is sealed by a sealing plug, so that transmission lubricating oil is prevented from leaking to the outside of a transmission through the inner hole of the half axle gear. The vehicle driving wheel is connected with a transmission half shaft through a differential mechanism of a gearbox to output power, and the differential mechanism is connected with the transmission half shaft through a spline. In order to prevent dust and water from entering the spline part in the running process of the vehicle, a sealing ring is required to be arranged between the half axle gear and the transmission half axle so as to seal and isolate the spline from the outside. Thus, a sealing area is formed among the transmission half shaft, the half shaft gear, the sealing cover and the sealing ring. When the transmission half shaft is installed, compressed high-pressure gas can be formed in the sealing area, the temperature of the half shaft gear rises when the differential mechanism runs in a differential mode, the air pressure in the sealing area further rises, and the sealing cover is easily flushed away when the air pressure rises to a certain value, so that the transmission is sealed and loses efficacy, and the oil leakage phenomenon occurs.

For preventing that sealed stifled lid from being washed to take off, the mode that carries out axial spacing to sealed stifled lid that adopts now has, for example, the fitting surface of sealed stifled lid and differential side gear's mounting hole is conical surface structure, and sealed stifled lid is for mouthful big end is the loudspeaker form, and differential side gear's mounting hole corresponds toper shape, and differential side gear's mounting hole is the step hole, and step hole drill way diameter is less than sealed stifled lid opening external diameter, and sealed stifled lid is installed the back drill way step that targets in place and is carried out axial spacing to sealed stifled lid, prevents that sealed stifled lid from droing. With the arrangement, because the diameter of the hole opening of the stepped hole is smaller than the outer diameter of the opening of the sealing plug, when the sealing plug is installed, the metal framework of the sealing plug is deformed, the sealing plug is scratched from the edge of the stepped hole and the like when the opening end of the sealing plug passes through the stepped hole, and therefore the sealing performance of the sealing plug is reduced. And the sealing plug cover is difficult to disassemble after being installed in place due to conical surface matching and step hole limiting, so that the sealing plug cover is inconvenient to replace.

In order to overcome the defect in the prior art, the application provides a sealed lid anti-disengaging structure, effectively solves sealed stifled lid and dashes the problem of taking off, improves differential mechanism's sealing performance and life.

First embodiment

Referring to fig. 1, the present embodiment provides a sealing cover anti-dropping structure 100, including a side gear 110, a sealing cover 130 and a collar 150, where the side gear 110 is provided with a first mounting hole 111 and a second mounting hole 113, the first mounting hole 111 and the second mounting hole 113 are located on the same axis, and optionally, the first mounting hole 111 is communicated with the second mounting hole 113. The second mounting hole 113 is used for mounting a transmission shaft 210 (as shown in fig. 4), the sealing cap 130 and the collar 150 are both mounted in the first mounting hole 111, and the collar 150 is located on the side of the sealing cap 130 away from the second mounting hole 113.

Further, the sealing cap 130 is in interference fit with the first mounting hole 111. Optionally, the sealing cap 130 includes a body 131 and a sealing layer 135 disposed on an outer surface of the body 131, and the sealing layer 135 is in interference fit with the first mounting hole 111. The body 131 may be made of metal, and the sealing layer 135 may be made of rubber. It is easily understood that the sealing layer 135 may be provided only on the outer surface of the body 131, or may be provided on both the inner surface and the outer surface of the body 131. In this embodiment, the sealing layer 135 is provided only on the outer surface of the body 131. The body 131 is made of a metal framework and has good supporting strength, and the sealing layer 135 is made of rubber and has good sealing performance.

Optionally, referring to fig. 2, the body 131 includes a bottom wall 132 and an annular side wall 133 connected to each other, the bottom wall 132 is circular, and the annular side wall 133 extends along an edge of the bottom wall 132 and is protruded toward one side of the bottom wall 132, so that the bottom wall 132 and the annular side wall 133 enclose a concave space. It will be readily appreciated that the bottom wall 132 and the annular sidewall 133 may be integrally formed or may be fixedly connected in a separate piece. The sealing layer 135 is disposed at a side of the body 131 far from the concave space, i.e., an outer surface of the body 131. The sealing layer 135 and the body 131 may be connected by bonding, riveting, sleeving, etc., and is not limited in particular. It will be readily appreciated that the seal layer 135 also comprises a bottom portion 136 and an annular side portion 137, the bottom portion 136 of the seal layer 135 being disposed on the bottom wall 132 of the body 131 and the annular side portion 137 being disposed on the annular side wall 133 of the body 131. The bottom portion 136 is shaped and dimensioned to conform to the shape and dimension of the bottom wall 132, and the annular side portion 137 is shaped and dimensioned to conform to the shape and dimension of the annular side wall 133.

In this embodiment, the inner surface of the first mounting hole 111 is a cylindrical surface, the outer surface of the sealing cap 130 is a cylindrical surface, and the outer diameter of the sealing cap 130 is adapted to the inner diameter of the first mounting hole 111, so that the sealing cap 130 can be in interference fit with the first mounting hole 111. Specifically, the annular side portion 137 contacts the inner wall of the first mounting hole 111, and an interference fit is employed. The cylindrical surface is adopted for assembly, namely the first mounting hole 111 and the sealing plug cover 130 are both in smooth surface fit, so that the processing technology is more convenient, the processing and manufacturing precision is high, and the high-precision surface roughness is easily obtained, so that the sealing plug cover 130 and the first mounting hole 111 are ensured to have good sealing performance. Secondly, first mounting hole 111 and sealed blanking cover 130 all adopt the face of cylinder cooperation, and the installation of sealed blanking cover 130 is dismantled more conveniently, when sealed blanking cover 130 needs to be changed after using for a long time, can dismantle sealed blanking cover 130 fast and change new sealed blanking cover 130, improves installation, dismantlement, change efficiency.

Referring to fig. 3, a card slot 115 is formed in the first mounting hole 111, and the collar 150 is disposed in the card slot 115. Alternatively, the locking groove 115 is disposed on an inner wall of the first mounting hole 111, and is disposed along a circumferential direction of the first mounting hole 111 and is an annular groove. The annular groove is coaxial with the first mounting hole 111. The collar 150 is annular and is fitted into the card slot 115. The clamping groove 115 is located on a side of the sealing cap 130 away from the second mounting hole 113, and after the collar 150 is mounted to the clamping groove 115, the collar 150 is just abutted against the sealing cap 130. It should be appreciated that the collar 150 has a width greater than the radial depth of the card slot 115 such that, when the collar 150 is installed in the card slot 115, a portion of the collar 150 is exposed from the card slot 115 and is positioned within the first mounting aperture 111. A part of the collar 150 exposed from the card slot 115 abuts against the sealing cap 130. Further, a portion of the collar 150 that exposes the card slot 115 abuts the bottom 136 of the seal layer 135.

Because partly block of rand 150 is in the draw-in groove 115, can restrict the axial displacement of rand 150 in first mounting hole 111, and another part exposes draw-in groove 115 and with sealed stifled lid 130 butt, can realize spacing the axial of sealed stifled lid 130, prevents that sealed stifled lid 130 roll-off from first mounting hole 111, has reliable limit function.

Optionally, the collar 150 is of a circlip a type for a hole, the collar 150 is designed to meet the national standard, and is convenient to machine and manufacture and easy to obtain, the collar 150 is convenient to assemble and disassemble, and meanwhile, the axial limiting of the sealing plug cover 130 can be achieved, and the anti-falling function of the sealing plug cover 130 is achieved.

In the sealing cover anti-separation structure 100 provided in this embodiment, the sealing plug 130 is installed in the first installation hole 111, and is in interference fit with the first installation hole 111, so as to seal the first installation hole 111 of the half-shaft gear 110 by the sealing plug 130. The retainer ring 150 is mounted in the groove 115 in the first mounting hole 111 and abuts against the sealing cap 130, so that the sealing cap 130 is axially limited and the sealing cap 130 is prevented from falling off.

Moreover, the matching surfaces of the first mounting hole 111 and the sealing cap 130 are both cylindrical surfaces, which is convenient for installation, and can also eliminate the risk of deformation of the steel skeleton when the sealing cap 130 is installed, thereby avoiding the sealing layer 135 rubber of the sealing cap 130 from being scratched with the first mounting hole 111. Meanwhile, the matching surfaces of the first mounting hole 111 and the sealing cover 130 are both cylindrical surfaces and smooth surfaces, so that the processing and manufacturing are convenient, the manufactured matching surfaces can easily obtain surface roughness with higher precision, and the sealing performance between the sealing cover 130 and the inner wall of the first mounting hole 111 can be ensured. After the sealing plug cover 130 is installed, the sealing plug cover 130 is convenient to disassemble, the sealing plug cover 130 can be replaced, and the installing, disassembling and replacing efficiency is high.

Second embodiment

Referring to fig. 4, an embodiment of the present invention provides a transmission device 200, which includes a transmission shaft 210 and a seal cover anti-disengaging structure 100 as in the previous embodiment, wherein the transmission shaft 210 is disposed in the second mounting hole 113 and is in transmission connection with the side gear 110.

Optionally, a key groove is formed in the second mounting hole 113, a spline 220 is sleeved on the transmission shaft 210, and the spline 220 is clamped into the key groove, so that power transmission between the transmission shaft 210 and the side gear 110 is realized. The power of the side gear 110 is transmitted to the propeller shaft 210 via the spline 220, and is output from the propeller shaft 210.

In order to prevent foreign substances such as dust, moisture, impurities, etc. from entering the spline 220, affecting the power transmission efficiency between the side gear 110 and the drive shaft 210 and the service life of the spline 220, a seal 230 is provided on the side of the spline 220 away from the first mounting hole 111. The sealing member 230 is used to prevent foreign materials such as dust, moisture, and impurities from entering into the spline 220, and ensure a good operation environment of the spline 220.

Further, a seal 230 is provided between the side gear 110 and the drive shaft 210. Alternatively, the sealing member 230 is an O-ring interposed between the transmission shaft 210 and the wall of the second mounting hole 113. It is easy to understand that, of the transmission shaft 210 and the hole wall of the second mounting hole 113 of the side gear 110, any one of them may be provided with a seal groove for mounting an O-ring. In this embodiment, a sealing groove is formed on an inner wall of the second mounting hole 113, and the sealing element 230 is mounted in the sealing groove. The sealing groove is formed in the inner wall of the second mounting hole 113, and is arranged along the circumferential direction of the second mounting hole 113 and is an annular groove. The sealing groove is located on the side of the key groove remote from the sealing cap 130, i.e. the key groove is located between the sealing groove and the sealing cap 130.

Optionally, the sealing groove is located at one end of the second mounting hole 113 far away from the first mounting hole 111, so that the sealing strip between the O-ring and the transmission shaft 210 is relatively long in width, and the risk that the O-ring fails to seal the transmission shaft 210 due to axial play of the transmission shaft 210 can be effectively eliminated. Meanwhile, foreign matters such as dust, water vapor and impurities can be prevented from entering the spline 220, so that the transmission efficiency of the spline 220 is improved, and the service life of the spline 220 is prolonged.

It should be noted that the transmission shaft 210 includes a first shaft section 211 and a second shaft section 213 that are connected to each other, a diameter of the first shaft section 211 is smaller than a diameter of the second shaft section 213, a shoulder 215 is formed at a joint of the first shaft section 211 and the second shaft section 213, and after the transmission shaft 210 is installed in the second installation hole 113, the first shaft section 211 is located at an end of the second installation hole 113 close to the first installation hole 111, and the second shaft section 213 is located at an end of the second installation hole 113 away from the first installation hole 111, that is, the second shaft section 213 is located at an opening position of the second installation hole 113. The seal 230 is located on the second shaft section 213 such that the width of the sealing band (i.e., the effective sealing section on the drive shaft 210) is the axial length between the O-ring and the shoulder 215, the narrower the width of the sealing band, the more likely the drive shaft 210 will experience play during actual operation leading to seal failure. The sealing strip between the O-ring and the transmission shaft 210 is relatively long in width and better in sealing performance due to the arrangement position of the sealing element 230 in the embodiment, and the risk of sealing failure of the O-ring on the transmission shaft 210 caused by axial movement of the transmission shaft 210 is further favorably eliminated.

Optionally, a dust cover 240 is further disposed on the second shaft section 213 of the transmission shaft 210, the dust cover 240 has a third mounting hole, the dust cover 240 is sleeved on the transmission shaft 210 through the third mounting hole, and the dust cover 240 is used for preventing water and dust, and has an isolation protection effect on the transmission shaft 210 and the side gear 110.

In the seal cap retaining structure 100 and the transmission device 200 provided in this embodiment, the seal cap retaining structure 100 can effectively limit the axial position of the seal cap 130 in the side gear 110 by providing the collar 150, so that the seal cap 130 can perform a good sealing function on the first mounting hole 111 of the side gear 110. The first mounting hole 111 and the sealing plug 130 are in interference fit with each other by using cylindrical surfaces, the cylindrical surfaces are convenient to process and manufacture, high-precision surface roughness is easy to obtain, and the matching surface is ensured to have good sealing performance. Moreover, the anti-disengaging structure 100 for the sealing cover is convenient to install, can rapidly realize the detachment and replacement of the sealing blocking cover 130, and has strong practicability.

The transmission device 200 comprises a transmission shaft 210 arranged in the side gear 110, a sealing member 230 is arranged between the transmission shaft 210 and the side gear 110, and the sealing member 230 is used for preventing impurities such as dust, water and the like from entering the spline 220, so that the transmission efficiency and the service life of the spline 220 are improved. The sealing cover anti-dropping structure 100 and the transmission device 200 can be applied to a differential, a transmission or other sealing devices, and have a wide application range.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a sealed lid anti-disengaging structure, its characterized in that, includes side gear, sealed blanking cover and rand, first mounting hole and second mounting hole have been seted up to side gear, the second mounting hole is used for installing the transmission shaft, sealed blanking cover with the rand is all installed in the first mounting hole, just the rand is located sealed blanking cover is kept away from one side of second mounting hole.

2. The seal cover disengagement prevention structure according to claim 1, wherein the seal cap is interference-fitted with the first mounting hole.

3. The seal cover anti-separation structure according to claim 2, wherein the seal cover comprises a body and a sealing layer arranged on the outer surface of the body, and the sealing layer is in interference fit with the first mounting hole.

4. The seal cover anti-dropping structure according to claim 3, wherein the sealing layer is a rubber sleeve.

5. The seal cover slip-off prevention structure of claim 1, wherein an inner surface of the first mounting hole is a cylindrical surface, and an outer surface of the seal cover is a cylindrical surface.

6. The sealing cover anti-dropping structure according to claim 1, wherein a clamping groove is formed in the first mounting hole, and the clamping ring is arranged in the clamping groove.

7. The sealing cover anti-dropping structure according to claim 6, wherein the clamping groove is disposed on a side of the sealing block cover away from the second mounting hole, and the clamping ring is abutted against the sealing block cover.

8. A transmission device, comprising a transmission shaft and the seal cover retaining structure according to any one of claims 1 to 7, wherein the transmission shaft is disposed in the second mounting hole and is in transmission connection with the side gear.

9. The transmission of claim 8, wherein a seal is provided between the side gear and the driveshaft.

10. The transmission of claim 9, wherein the second mounting hole has a seal groove therein, and the seal is mounted in the seal groove.

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