CN214367210U - Gear box input shaft, gear box and new energy vehicle - Google Patents

Abstract

The utility model provides a gear box input shaft, gear box and new forms of energy vehicle, the gear box input shaft includes: an input shaft body and an internal spiral structure; the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power; the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body. By the arrangement, continuous lubrication and cooling of the splines are realized, the abrasion of the splines is reduced, metal particles between the splines can be discharged in time along with an oil way, and the service life of the splines is prolonged; meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

Description

Gear box input shaft, gear box and new energy vehicle

Technical Field

The utility model relates to a new energy automobile technical field, in particular to gear box input shaft, gear box and new energy vehicle.

Background

In the new energy automobile industry, a motor and a gear box often adopt a spline structure to transmit torque. In practical situations, however, the spline is worn and heated due to manufacturing errors, assembly deviation and high-speed rotation, the service life of the spline is shortened, and finally the spline is failed.

At present, most of methods for reducing spline wear in the industry are to coat lubricating grease. Referring to fig. 1, fig. 1 is a schematic view of an input shaft of a conventional gearbox, in which grease is applied between a female spline 1 and a male spline 2 to form an oil film to reduce friction, but this method also has certain disadvantages, such as that in the case of high-speed rotation, grease is thrown out from gaps between the splines due to a severe centrifugal action, and the splines cannot be kept continuously lubricated. In order to keep lubricating oil on the working surface of the spline, some designs install a sealing ring 3 at a spline joint port to seal lubricating grease on the working surface of the spline, but the design can not discharge metal particles between the male spline and the female spline in time, so that the risk of accelerated spline abrasion exists. In addition, corresponding production equipment and process for greasing and installing the sealing ring 3 are needed in the production and assembly links, and equipment and process for detecting the assembly quality of the sealing ring are also needed. These measures not only increase the design cost but also increase the tact time and equipment cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear box input shaft, gear box and new forms of energy vehicle to the sealing washer that metal particle can not in time discharge, spline life is short, set up between the spline fit of solving current gear box has increased manufacturing cost's problem.

In order to solve the technical problem, the utility model provides a gear box input shaft, include: an input shaft body and an internal spiral structure; the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power; the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body.

Optionally, the inner spiral structure includes an inner spiral cavity, and the inner spiral cavity is opened on a side wall of the inner cavity and is communicated with the inner cavity.

Optionally, the internal spiral structure includes internal spiral ridges, and the internal spiral ridges are disposed on the side walls of the inner cavity and protrude toward the center of the inner cavity.

Optionally, the internal spiral structure includes an internal thread tube, the internal thread tube is axially through, and the internal thread tube is inserted into the inner cavity.

Optionally, the input shaft body has a second end opposite to the first end along the axial direction, and the gearbox input shaft further includes a flow guide structure disposed at the second end of the input shaft body.

Optionally, the flow guiding structure includes any one of a flow guiding plate, a flow guiding groove, or an oil guiding pipe.

Optionally, at least a portion of the inner cavity comprises a transition section having a radial dimension proximate the first end that is greater than a radial dimension of the transition section distal the first end.

Optionally, the inner cavity is coaxial with the input shaft body.

In order to solve the technical problem, the utility model also provides a gear box, include: a housing, a gearbox input shaft as described above, and an output shaft; the input shaft and the output shaft of the gear box are both arranged inside the shell; the output shaft is bonded on the outer side of the first end of the input shaft of the gear box, an axial gap is formed between the output shaft and the input shaft of the gear box, and the axial gap is communicated with the inner cavity.

In order to solve the technical problem, the utility model also provides a new energy vehicle, include as above the gear box.

The utility model provides a pair of among gear box input shaft, gear box and the new forms of energy vehicle, the gear box input shaft includes: an input shaft body and an internal spiral structure; the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power; the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body. According to the arrangement, when the input shaft of the gear box works, under the working state, the lubricating oil of the gear box can be guided into the first end of the input shaft body by the inner spiral structure according to the spiral pushing principle, then the lubricating oil flows through the gap between the input shaft body and the output shaft and flows through the working surface of the spline to form a recyclable oil path, so that the continuous lubrication and cooling of the spline are realized, the abrasion of the spline is reduced, metal particles between the spline can be timely discharged along with the oil path, and the service life of the spline is prolonged; meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

FIG. 1 is a schematic illustration of a prior art gearbox input shaft;

fig. 2 is a schematic view of an input shaft of a gearbox according to a first embodiment of the present invention;

FIG. 3 is a schematic view of an alternative gearbox input shaft according to an embodiment of the present invention;

FIG. 4 is a schematic view of a gearbox input shaft of the increased flow directing arrangement shown in FIG. 2;

fig. 5 is a schematic view of an input shaft of a gearbox according to a second embodiment of the present invention;

FIG. 6 is a schematic view of the internally threaded tube of FIG. 5 mated with the gearbox input shaft;

fig. 7 is a schematic view of an input shaft of a gearbox according to a third embodiment of the present invention.

In the drawings:

1-female spline; 2-male splines; 3-sealing ring; 10-an output shaft; 100-an input shaft body; 200-internal spiral structure; 210-an internal helical cavity; 220-internal spiral wale; 230-an internally threaded tube; 300-lumen; 310-transition section; 400-a flow guide structure; 500-axial clearance.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

The core of the utility model lies in providing a gear box input shaft, through set up interior helical structure in the inner chamber at the gear box input shaft, interior helical structure's spiral direction is followed the rotation direction of input shaft body is close to gradually first end. Due to the arrangement, the abrasion of the splines is reduced, metal particles between the splines can be discharged in time along with an oil way, and the service life of the splines is prolonged; meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

The utility model provides a gear box input shaft, gear box and new forms of energy vehicle, the gear box input shaft includes: an input shaft body and an internal spiral structure; the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power; the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body. According to the arrangement, when the input shaft of the gear box works, under the working state, the lubricating oil of the gear box can be guided into the first end of the input shaft body by the inner spiral structure according to the spiral pushing principle, then the lubricating oil flows through the gap between the input shaft body and the output shaft and flows through the working surface of the spline to form a recyclable oil path, so that the continuous lubrication and cooling of the spline are realized, the abrasion of the spline is reduced, metal particles between the spline can be timely discharged along with the oil path, and the service life of the spline is prolonged; meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

The following description refers to the accompanying drawings.

[ EXAMPLES one ]

Please refer to fig. 2 to 4, wherein fig. 2 is a schematic view of an input shaft of a gearbox according to an embodiment of the present invention; FIG. 3 is a schematic view of an alternative gearbox input shaft according to an embodiment of the present invention; FIG. 4 is a schematic view of the gearbox input shaft of the increased flow directing arrangement shown in FIG. 2.

Referring to fig. 2 to 3, the first embodiment provides a gearbox input shaft, including: an input shaft body 100 and an inner helical structure 200; the input shaft body 100 comprises an inner cavity 300 which is arranged in a penetrating way along the axial direction, and a first end of the input shaft body 100 is used for being matched with an output shaft 10 to transmit power; the inner spiral structure 200 is disposed on at least a portion of the inner cavity 300, and a spiral direction of the inner spiral structure 200 gradually approaches the first end along with a rotation direction of the input shaft body. In the first exemplary embodiment, the inner cavity 300 is cylindrical, but the inner cavity 300 may also be cylindrical with other cross sections, or may also be a non-cylindrical structure that is bent along the axial direction. The first end of the input shaft body 100 is connected to the output shaft 10 by spline fitting, but the matching relationship may be other forms. The internal spiral structure 200 determines that the spiral direction of the internal spiral structure 200 is right-handed according to the rotation condition of the input shaft of the gearbox, and it should be noted that, referring to fig. 2, the internal spiral structure in fig. 2 is a cross-sectional view. In fig. 2, when viewed from the right side (the oil inlet end of the input shaft body 100) toward the left side (i.e., when viewed from the housing end toward the motor, the left side and the right side are directions of the left side and the right side in fig. 2), the rotation direction of the input shaft of the gearbox during operation is counterclockwise rotation, and when the input shaft rotates, the lubricating oil enters the internal spiral structure 200, and the lubricating oil is pushed toward the direction of the first end (the left side in fig. 2, the same applies below) through the right-hand thread of the internal spiral structure 200. It should be understood that the rotation structure of the internal spiral structure is matched with the rotation of the lubricating oil in the internal spiral structure, and the lubricating oil can be pushed to the left along the internal spiral structure when the internal spiral structure rotates rightwards. However, in other embodiments, the internal spiral structure 200 may be set according to actual requirements, as long as it can ensure that the spiral direction of the internal spiral structure 200 can push the lubricating oil toward the first end, for example, when the rotation direction of the gearbox input shaft during operation is clockwise (i.e. when viewed from the housing end to the motor direction, the left and right sides are the left and right sides in fig. 2), and the spiral direction in the internal spiral structure 200 is left. It should be noted that the first end is not limited to the end surface on the left side of the input shaft body 100, but should be understood as a region of this end on the left side end surface (the left side is the left side in fig. 2).

The utility model provides a pair of gear box input shaft, through set up interior helical structure 200 in the inner chamber 300, interior helical structure 200's spiral direction is followed the direction of rotation of input shaft body is close to gradually first end. When the input shaft of the gear box works, under the working state that the input shaft of the gear box rotates, lubricating oil of the gear box can be guided into the first end of the input shaft body 100 by using the spiral pushing principle, then the lubricating oil flows through the working surface of the spline through the gap between the input shaft body 100 and the output shaft 10 to form a recyclable oil path, so that continuous lubrication and cooling of the spline can be realized, abrasion of the spline is reduced, metal particles between the spline can be timely discharged along with the oil path, and the service life of the spline is prolonged. Meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

Preferably, the inner spiral structure 200 includes an inner spiral cavity 210, and the inner spiral cavity 210 is opened on a sidewall of the inner cavity 300 and is communicated with the inner cavity 300. The input shaft body 100 has a second end axially opposite the first end. Referring to fig. 2, when the input shaft of the gearbox is working, the lubricating oil in the gearbox enters from the second end and then pushes the lubricating oil to the first end of the input shaft body 100 through the internal spiral cavity 210, the oil path circulates as shown by the arrow in fig. 2, when the lubricating oil reaches the first end of the input shaft of the gearbox, the lubricating oil spreads and flows along the radial direction of the first end of the input shaft of the gearbox, and then reaches the position between the splines of the input shaft body 100 matched with the output shaft 10, so as to lubricate the working surfaces of the splines. Similarly, as shown in fig. 3, the inner spiral cavity 210 is disposed on a portion of the inner cavity 300, but the inner spiral cavity 210 may also be disposed on the inner cavity 300 in a segmented manner, or disposed in the inner cavity 300 in the region of the second end and the inner cavity 300 in the region of the first end (i.e., disposed on the head end and the tail end of the input shaft body 100). In other embodiments, the inner helical cavities 210 in the inner cavity 300 may be a combination of multiple inner helical cavities 210 of different cavity sizes and different helical pitches.

Preferably, the inner cavity 300 is coaxially disposed with the input shaft body 100. Thereby ensuring that the inner cavity 300 axially rotates with the input shaft body 100 in the axial direction.

Further, in order to assist the gearbox input shaft in the lubricating oil system, lubricating oil can be introduced into the inner cavity 300 of the input shaft body 100, the input shaft body 100 has a second end opposite to the first end along the axial direction, and the gearbox input shaft further comprises a flow guide structure 400, and the flow guide structure 400 is arranged at the second end of the input shaft body 100. More preferably, the flow guiding structure 400 includes any one of a flow guiding plate, a flow guiding groove or an oil guiding pipe. In the first exemplary embodiment, referring to fig. 4, the flow guiding structure 400 includes a flow guiding plate, and the flow guiding plate with such an auxiliary feature can guide the lubricating oil thrown up by the gear into the inner cavity 300 of the input shaft, in short, as long as one structure has the function of guiding the oil, the flow guiding structure 400 can be used.

The present embodiment further provides a gearbox, please refer to fig. 2, including: a housing, a gearbox input shaft as described above, and an output shaft 10; the input shaft and the output shaft 10 of the gearbox are both arranged inside the shell; the output shaft 10 is bonded to the outside of the first end of the gearbox input shaft, and an axial gap 500 is formed between the output shaft and the gearbox input shaft, and the axial gap 500 is communicated with the inner cavity 300. In the first exemplary embodiment, the axial gap 500 not only represents the gap between the gear input shaft and the output shaft 10 in the axial direction, but also includes the gap space between the spline of the first end of the gear input shaft and the output shaft 10. The gearbox has the beneficial effects brought by the gearbox input shaft, and the structure and the principle of other parts of the gearbox are not described in detail herein, so that the prior art can be referred to, and the description is not expanded herein.

The embodiment also provides a new energy vehicle, which comprises the gearbox. The new energy vehicle has the beneficial effects brought by the gear box, and is not described herein any more, and the structures and principles of other components of the new energy vehicle can refer to the prior art, and are not described herein any more.

[ example two ]

Please refer to fig. 5 to 6, wherein fig. 5 is a schematic view of an input shaft of a gearbox according to a second embodiment of the present invention; FIG. 6 is a schematic view of the internally threaded tube of FIG. 5 mated with the gearbox input shaft.

The same parts of the input shaft of the gearbox in the second embodiment as those in the first embodiment will not be described again, and only different points will be described below.

In the gearbox input shaft provided in this embodiment, preferably, the internal spiral structure 200 includes internal spiral ridges 220, and the internal spiral ridges 220 are disposed on the side walls of the internal cavity 300 and protrude toward the center of the internal cavity 300. Of course, the internal spiral ridges 220 may also be partially disposed on the sidewalls of the inner cavity 300, and the pitch of the internal spiral ridges 220 may also be different, and the height of the internal spiral ridges 220 may also be different.

In fact, in order to simplify the actual manufacturing process, it is preferable that, referring to fig. 5 and 6, the internal screw structure 200 includes an internal screw tube 230, the internal screw tube 230 axially penetrates, and the internal screw tube 230 is inserted into the inner cavity 300. The internal structure of the internal threaded tube 230 is similar to the internal threaded embossment 220, except that the internal threaded tube 230 is a separately manufactured tube, the internal threaded embossment 220 is directly arranged on the side wall of the inner cavity 300, the second embodiment adopts the form of the internal threaded tube 230, in order to simplify the process, an internal threaded tube 230 is directly inserted into the inner cavity 300 of the input shaft body 100, the material of the internal threaded tube 230 is not limited, and can be metal or plastic, as long as the structural requirements of the internal threaded tube 230 can be met. The external configuration of the internally threaded tube 230 matches the internal cavity 300, for example, the internal cavity 300 is cylindrical, the external wall of the internally threaded tube 230 is also cylindrical, the internal cavity 300 is conical, the external portion of the internally threaded tube 230 is also conical, or the internally threaded tube 230 is designed such that when the internal cavity 300 is a combination of cylindrical and conical. In addition, as shown in fig. 5, the position of the internally threaded tube 230 matching with the second end of the inner cavity 300 is provided with a flow guide structure 400, and the flow guide structure 400 comprises an oil guide pipe which can guide the lubricating oil into the inside of the internally threaded tube 230 more conveniently.

[ EXAMPLE III ]

Referring to fig. 7, fig. 7 is a schematic view of an input shaft of a gearbox according to a third embodiment of the present invention.

The input shaft of the gearbox of the third embodiment is not described again in the same way as the first and second embodiments, and only different points will be described below.

In the gearbox input shaft provided in the third embodiment, preferably, at least a portion of the inner cavity 300 includes a transition section 310, and a radial dimension of the transition section 310 near the first end is larger than a radial dimension of the transition section 310 away from the first end. In the third embodiment, the cross section of the transition section 310 is a circle, the radial dimension is an inner diameter of the circle, the circle gradually changes from the end far away from the first end to the inner diameter at the first end, after the lubricating oil enters from the second end and then enters the transition section 310, the lubricating oil can flow along the transition section 310 to an area with gradually increased inner diameter along the transition section 310 as the inner diameter of the circle gradually increases, so that the lubricating oil enters the area close to the first end. It should be understood that the cross section of the transition section 310 is not necessarily circular, but may also be polygonal, in which case the inner cavity 300 is a polygonal inner cavity 300, and the polygonal inner cavity 300 gradually increases from the first end to the maximum radial dimension near the first end, i.e. presents a flaring shape. The change of the polygonal inner cavity 300 of the transition section 310 can also be judged by the change of the circumscribed circle diameter of the polygon with polygonal cross section, for example, when the polygon is a regular hexagon, the column structure of the regular hexagon is flared towards the first end. Likewise, the inner spiral structure 200 is disposed inside the transition section 310, and the inner spiral structure 200 may be an inner spiral cavity 210, or an inner spiral ridge 220, or an inner threaded pipe 230.

Of course, in the first to third embodiments, the structures of the inner cavity 300 in the input shaft of the gearbox may be combined with each other, and the arrangement of the internal thread structures may also be combined with each other, for example, the internal spiral structure 200 may be the combination of the internal spiral cavities 210 in the first embodiment and the internal spiral ridges 220 in the second embodiment, or the combination of the internal spiral cavities 210 and the internal thread pipes 230 in the first embodiment. Meanwhile, the inner cavity 300 may also be a combination of the inner cavity 300 including the transition section 310 in the third embodiment and the internal spiral structure 200 in the first embodiment or the second embodiment, for example, when one end of the inner cavity 300 near the second end is a cylindrical inner cavity 300, one end near the second end is a tapered transition section 310, the cylindrical inner cavity is provided with the internal spiral cavity 210, and the tapered transition section 310 is not provided with the internal spiral structure 200; alternatively, an internally threaded tube 230 may be provided in the cylindrical cavity and an internal helical cavity 210 may be provided in the tapered transition 310.

To sum up, in the utility model provides a pair of among gear box input shaft, gear box and the new forms of energy vehicle, the gear box input shaft includes: an input shaft body and an internal spiral structure; the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power; the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body. According to the arrangement, when the input shaft of the gear box works, under the working state, the lubricating oil of the gear box can be guided into the first end of the input shaft body by the inner spiral structure according to the spiral pushing principle, then the lubricating oil flows through the gap between the input shaft body and the output shaft and flows through the working surface of the spline to form a recyclable oil path, so that the continuous lubrication and cooling of the spline are realized, the abrasion of the spline is reduced, metal particles between the spline can be timely discharged along with the oil path, and the service life of the spline is prolonged; meanwhile, lubricating grease and sealing ring materials are omitted, and corresponding production equipment and process cost for grease application and installation of the detection sealing ring are omitted.

It should be noted that each embodiment in the present specification focuses on the difference from other embodiments, and the same and similar parts between the embodiments may be referred to each other, and in addition, different parts between the embodiments may also be used in combination with each other, which is not limited by the present invention.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims (10)

1. A gearbox input shaft, comprising: an input shaft body and an internal spiral structure;

the input shaft body comprises an inner cavity which is arranged in a penetrating way along the axial direction, and the first end of the input shaft body is used for being matched with an output shaft to transmit power;

the inner spiral structure is arranged on at least one part of the inner cavity, and the spiral direction of the inner spiral structure is gradually close to the first end along with the rotation direction of the input shaft body.

2. A gearbox input shaft as defined in claim 1, wherein the inner helical structure includes an inner helical cavity opening in a side wall of the inner cavity and communicating with the inner cavity.

3. The gearbox input shaft of claim 1, wherein the internal helical structure comprises internal helical ribs disposed on sidewalls of the internal cavity and protruding toward a center of the internal cavity.

4. A gearbox input shaft as defined in claim 1, wherein the inner helical structure comprises an internally threaded tube extending axially therethrough, the internally threaded tube being inserted within the internal cavity.

5. A gearbox input shaft as defined in claim 1, wherein the input shaft body has a second end axially opposite the first end, the gearbox input shaft further comprising a flow directing structure disposed at the second end of the input shaft body.

6. A gearbox input shaft as defined in claim 5, wherein the flow directing structure comprises any one of a flow deflector, a flow guide slot, or an oil guide tube.

7. A gearbox input shaft as defined in claim 1, wherein at least a portion of the internal cavity includes a transition having a radial dimension proximate the first end that is greater than a radial dimension of the transition distal the first end.

8. A gearbox input shaft as defined in claim 1, wherein the internal cavity is coaxial with the input shaft body.

9. A gearbox, comprising: a housing, a gearbox input shaft according to any one of claims 1 to 8, and an output shaft;

the input shaft and the output shaft of the gear box are both arranged inside the shell;

the output shaft is bonded on the outer side of the first end of the input shaft of the gear box, an axial gap is formed between the output shaft and the input shaft of the gear box, and the axial gap is communicated with the inner cavity.

10. A new energy vehicle, characterized by comprising a gearbox according to claim 9.

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