CN218000323U - Reduction gear fluted disc, reduction gear and vehicle - Google Patents

Abstract

The invention provides a speed reducer fluted disc, a speed reducer and a vehicle, and relates to the technical field of vehicle manufacturing, wherein the speed reducer fluted disc comprises a fluted disc body, and an internal spline comprising a plurality of spline teeth is arranged on the fluted disc body and is used for being in interference fit with an assembly part; the internal spline comprises a plurality of key teeth, a key groove is formed between two adjacent key teeth, one end, close to the to-be-assembled position, of the key groove is provided with a flaring portion with a guide surface of a planar structure, and in the direction of the to-be-assembled position, the guide surface inclines towards the center from the edge of the internal spline, so that the press fitting of the internal spline is guided, the assembling difficulty is reduced, and the assembling efficiency is improved.

Description

Reduction gear fluted disc, reduction gear and vehicle

Technical Field

The disclosure relates to the technical field of vehicle manufacturing, in particular to a speed reducer fluted disc, a speed reducer and a vehicle.

Background

The existing new energy automobile speed reducer middle shaft assembly generally adopts a connection mode of spline tooth side interference, and the tooth thickness of an external spline is larger than the tooth width of an internal spline, so that the external spline tooth and the internal spline are formed in tooth side interference. The gear shaft and the disk teeth are connected in an interference mode through tooth sides to form a middle shaft assembly. However, because there is the interference between external splines and the internal splines, external splines tooth thickness is greater than the internal splines tooth socket width promptly, and the intermediate shaft subassembly is when carrying out gear shaft and dish tooth pressure equipment, has the problem that internal splines tooth and external splines groove are difficult to align, are difficult to impress, influences production efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the disclosure provides a speed reducer fluted disc, a speed reducer and a vehicle.

The utility model provides a reduction gear fluted disc, including the fluted disc body, be equipped with the internal spline on the fluted disc body, the internal spline includes a plurality of key teeth, is formed with the keyway between two adjacent key teeth, and the keyway is close to the one end of treating the assembly position and is formed with flaring portion, and at least one side of flaring portion is provided with the spigot surface, and in the direction of directional assembly position of treating, the spigot surface is by the edge of key tooth to the center slope.

Optionally, both sides of the flared portion are provided with guide surfaces.

Optionally, the guide surface is of planar configuration.

Optionally, the two guide surfaces are each inclined at an angle of 3 ° to 5 ° to the key teeth.

Optionally, one end of the flared portion close to the position to be assembled is provided with a chamfer.

Optionally, the angle of inclination of the flared portion to the key teeth is 30 °.

Optionally, the guide surface has a length in the direction of the site to be assembled of 2mm to 6mm.

Optionally, the number of key teeth is 32 to 56.

The utility model provides a speed reducer, including jackshaft and foretell reduction gear fluted disc, be equipped with the external splines on the jackshaft, external splines and internal spline interference fit, the magnitude of interference is 0.03mm to 0.12mm.

The vehicle comprises the speed reducer.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the speed reducer fluted disc, the speed reducer with the fluted disc and the vehicle, the fluted disc body is provided with the internal spline for interference fit with an assembly part; the internal spline includes a plurality of key teeth, is formed with the keyway between two adjacent key teeth, and the keyway is close to the one end of treating the fitting bit and is formed with the flaring portion that has the spigot surface, and in the direction of the orientation of treating the fitting bit, the spigot surface is by the edge of internal spline to the center slope to the pressure equipment of internal spline leads, reduces the assembly degree of difficulty, improves assembly efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of a toothed disc of a reduction gear according to an embodiment of the present disclosure;

FIG. 2 is a partial schematic view of an internal spline according to an embodiment of the present disclosure;

FIG. 3 is an exploded view of the assembly of the toothed disc and the intermediate shaft of the reduction gear according to the embodiment of the present disclosure.

Wherein, 1, a speed reducer fluted disc; 11. a fluted disc body; 12. an internal spline; 13. a flared part; 14. a keyway; 15. chamfering; 2. an intermediate shaft; A. the position to be assembled.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

With reference to fig. 1 to 3, an intermediate shaft of a speed reducer provided by an embodiment of the present disclosure includes a toothed disc body 11, an internal spline 12 is provided on the toothed disc body 11, the internal spline 12 includes a plurality of key teeth, a key groove 14 is formed between two adjacent key teeth, a flared portion 13 is formed at one end of the key groove 14 close to an assembly position, at least one side of the flared portion 13 is provided with a guide surface, and the guide surface inclines from an edge of the key tooth to a center in a direction pointing to the assembly position.

In the reducer fluted disc 1, an internal spline 12 with a plurality of key grooves 14 is formed on a fluted disc body 11 and is used for interference fit with an assembly; a flared portion 13 having a guide surface is formed at one end of the spline teeth near the fitting site, and the guide surface is inclined from the edge of the internal spline 12 toward the center in a direction toward the fitting site, thereby guiding the press fitting of the internal spline 12. Preferably, the flared portion 13 having the guide surface may be formed by cutting the spline teeth.

By adopting the reducer fluted disc 1, the flaring part 13 with the inclined guide surface arranged on the spline tooth can guide the press fitting of the internal spline 12 and the belt fitting part with the external spline, thereby overcoming the problems that the internal spline 12 is difficult to align with the fitting part to be fitted and is difficult to press in, reducing the fitting difficulty and improving the fitting efficiency.

In some embodiments, both sides of the flared portion 13 are provided with guide surfaces. Specifically, the guide surfaces arranged on the two sides of the flared part 13 are more favorable for aligning the internal spline 12 with the part to be assembled, and the problem that the assembly quality is affected due to the inclination angle generated between the central axis of the intermediate shaft and the central axis of the part to be assembled in the pressing-in process is avoided.

In some embodiments, the guide surface is a planar structure. Specifically, the guide surface of the planar structure can play a role in guiding, processing on the internal spline is facilitated, and production efficiency is improved.

In some embodiments, the two guide surfaces are equal in length. Preferably, the two guide surfaces are symmetrical about the central axis of the flared portion 13. Specifically, two guide surfaces symmetrical about the central axis of the flared portion 13 are more uniformly stressed on two sides of the flared portion 13 in the interference press-in process, so as to avoid the problems of deformation, fracture and the like of the flared portion 13 due to unilateral overload.

In some embodiments, the two guide surfaces are each angled at 3 ° to 5 ° relative to the spline teeth. Preferably, the two guide surfaces are both inclined at an angle of 4 ° to the key teeth. Specifically, when the inclination angle is too small, the guide effect cannot be achieved, and when the inclination angle is too large, the guide effect can be achieved by multiple feeding, so that the processing cost is increased, and the processing efficiency is reduced.

In some embodiments, the thickness of the key teeth increases from the top to the bottom of the key teeth. Specifically, the spline teeth with narrow top and wide bottom can ensure that the spline teeth of the internal spline 12 have high strength, and the external spline on the assembly to be used for matching with the internal spline 12 also has the high-strength structure. Preferably, the internal splines 12 are involute splines.

In some embodiments, the key teeth are provided with a chamfer near an end of the bit to be assembled. Alternatively, the inclination angle of the above-described chamfer with respect to the key teeth may be 45 °. Specifically, the chamfer can be used as a guide surface, so that the key teeth are provided with the guide surfaces in the thickness direction and the height direction, the press fitting of the internal spline 12 can be guided, the assembly difficulty is reduced, and the assembly efficiency is improved.

In some embodiments, the angle of inclination of the flared portion 13 with respect to the key teeth is 30 °. Particularly, when the inclination angle is 30 degrees, the guiding function can be realized, and the stability is high.

In some embodiments, the length of the guide surface in the direction towards the site to be fitted is 2mm to 6mm. Specifically, too short a guide surface may not provide a good guiding effect, while too long a guide surface may reduce the interference length, affecting the effect of the interference fit.

In some embodiments, the number of key teeth is 32 to 56. Specifically, the increase of the number of the key teeth means that more interference connecting surfaces are arranged, so that the area of a transmission surface can be increased, the force transmission capacity is improved, and the connection between the speed reducer disc teeth 1 and a part to be assembled is more reliable and is not easy to disengage; however, the increase of the number of the key teeth also causes the thickness of each key tooth to be reduced, which causes the smaller the tooth thickness of the cutter for processing the key teeth, the shorter the service life of the cutter and the higher the cost of the cutter; meanwhile, the processing technology is more complex, and the processing cost of the disc gear 1 of the speed reducer is increased. Therefore, the number of the key teeth is 32 to 56, so that the reliability of interference fit between the speed reducer disk teeth 1 and the to-be-assembled part can be ensured, and the design and processing cost can be controlled.

In some embodiments of the present disclosure, a speed reducer is further provided, including an intermediate shaft 2 and the above speed reducer fluted disc 1, an external spline is provided on the intermediate shaft 2, the external spline is in interference fit with the internal spline 12, and the interference is 0.03mm to 0.12mm. In more detail, the interference magnitude of less than 0.03mm is easy to cause the disk teeth 1 of the speed reducer to be separated from the intermediate shaft 2, and the interference magnitude of more than 0.12mm is easy to cause the large-tonnage hydraulic press to be adopted for assembly, so that the cost is increased; therefore, the interference magnitude of 0.03mm to 0.12mm can ensure the reliability of interference fit and is convenient to assemble. Specifically, a flared part 13 with a guide surface is arranged on the press-in end of the intermediate shaft 2 on the speed reducer fluted disc 1, so that the width of the tooth groove of one end, close to the press-in end of the external spline, of the internal spline 12 is larger than the tooth thickness of one end, close to the press-in end of the internal spline 12, of the external spline. Therefore, the flared part 13 with the guide surface is pressed on the inner spline 12, so that the gear shaft and the disc teeth can be aligned and guided more easily during press fitting, and the problems of difficult alignment and difficult press-in of an interference connection spline intermediate shaft assembly are solved; and the rear end of the spline still keeps interference fit, so that the function of interference connection is achieved. Preferably, the reducer toothed disc 1 is a gear shaft.

In some embodiments of the present disclosure, there is also provided a vehicle including the above-described decelerator.

The utility model provides a pair of new energy automobile, one through the internal spline 12 to reduction gear fluted disc 1 is close to waiting to assemble the position and serves and form flaring portion 13 that has the spigot surface to make reduction gear fluted disc 1's internal spline 12 aim at and lead with the pressure equipment of jackshaft 2 more easily, with the reduction assembly degree of difficulty, improve assembly efficiency.

In the description of the embodiments of the present disclosure, it is to be understood that the terms "center", "length", "width", "thickness", "height", "up", "down", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present disclosure and simplifying the description, but do not indicate or imply that the structures or devices referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the embodiments of the present disclosure.

It is noted that, in this document, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. The utility model provides a reduction gear fluted disc, its characterized in that, includes the fluted disc body, be equipped with the internal spline on the fluted disc body, the internal spline includes a plurality of key teeth, and two are adjacent be formed with the keyway between the key tooth, the keyway is close to the one end of treating the assembly position and is formed with the flaring portion, at least one side of flaring portion is provided with the spigot surface, in the direction of the orientation of treating the assembly position, the spigot surface by the edge of key tooth is to the center slope.

2. The reduction gear chainring of claim 1, wherein said guide surfaces are provided on both sides of said flared portion.

3. The speed reducer chainring of claim 2, wherein said guide surface is planar.

4. The speed reducer chainring of claim 3, wherein both of said guide surfaces are inclined at an angle of 3 ° to 5 ° relative to said keyteeth.

5. The reducer chainring of claim 1, wherein an end of the spline teeth adjacent the to-be-assembled location is chamfered.

6. The reducer chainring of claim 5, wherein said chamfers are angled at 30 ° relative to said spline teeth.

7. The speed reducer chainring of claim 1, wherein the guide surface has a length in a direction toward the to-be-assembled position of between about 2mm and about 6mm.

8. The reducer chainring of claim 1, wherein the number of spline teeth is between 32 and 56.

9. A reducer comprising an intermediate shaft and the reducer toothed disc of any one of claims 1 to 8, the intermediate shaft having external splines thereon that are in interference fit with the internal splines by an interference of 0.03mm to 0.12mm.

10. A vehicle characterized by comprising a retarder according to claim 9.

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