CN213479139U - Speed reducer and vehicle - Google Patents

Abstract

The utility model discloses a speed reducer, speed reducer includes: the oil tank comprises a shell, wherein an accommodating space is formed in the shell, and at least one part of the accommodating space is arranged as an oil tank; a reduction gear set disposed in the accommodating space and including: the intermediate gear is in transmission between the input gear and the output gear; the oil blocking piece is at least partially arranged in the oil pool of the shell, the oil blocking piece is positioned at the bottom of the intermediate gear and/or the output gear and at least partially surrounds the intermediate gear and/or the output gear, and an oil guide hole penetrating through the oil blocking piece is formed in the oil blocking piece. From this, through set up the oil blocking piece at the bottom of intermediate gear and/or output gear around ground, not only can strengthen casing intensity, the oil blocking piece can have better parcel nature to intermediate gear and/or output gear moreover, can reduce the stirring oil volume when intermediate gear and/or output gear rotate, can reduce and stir the oil loss to can improve the efficiency of reduction gear.

Description

Speed reducer and vehicle

Technical Field

The utility model belongs to the technical field of the automotive technology and specifically relates to a reduction gear and vehicle are related to.

Background

With the development of science and technology and the improvement of living standard of people, the characteristics of automobiles and convenience and practicability are generally accepted by people and are basically popularized.

In the correlation technique, the lubricating oil of lubricated gear of general storage oil in the automobile speed reducer, partly infiltration of gear is in lubricating oil, and when the gear rotated to stir oil like this, lubricating oil can lubricated gear, but at this in-process, the gear not only can be because stir the great energy consumption's that leads to the reduction gear of oil quantity rise, reduces the efficiency of reduction gear, still can lead to fluid to splash everywhere, has increased the loss of oil quantity.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a speed reducer, which can not only improve the efficiency of the gear rotation of the speed reducer, but also reduce the loss of the oil amount in the speed reducer.

The utility model also discloses a vehicle.

According to the utility model discloses a speed reducer, include: the oil tank comprises a shell, wherein an accommodating space is formed in the shell, and at least one part of the accommodating space is arranged as an oil tank; a reduction gear set disposed in the accommodation space and including: an input gear, an intermediate gear and an output gear, the intermediate gear transmitting between the input gear and the output gear; the oil blocking piece is at least partially arranged in an oil pool of the shell, the oil blocking piece is positioned at the bottom of the intermediate gear and/or the output gear and at least partially surrounds the intermediate gear and/or the output gear, and an oil guide hole penetrating through the oil blocking piece is formed in the oil blocking piece.

From this, through set up the oil blocking piece at the bottom of intermediate gear and/or output gear around ground, not only can strengthen casing intensity, the oil blocking piece can have better parcel nature to intermediate gear and/or output gear moreover, can reduce the stirring oil volume when intermediate gear and/or output gear rotate, can reduce and stir the oil loss to can improve the efficiency of reduction gear.

In some examples of the present invention, the oil blocking member includes: the first oil retaining piece is located at the bottom of the intermediate gear, the second oil retaining piece is located at the bottom of the output gear, and the first oil retaining piece and the second oil retaining piece are provided with oil guide holes.

In some examples of the present invention, the first oil retaining member and the second oil retaining member are both configured to be arc-shaped and connected.

In some examples of the present invention, the first oil blocking member and the second oil blocking member are oil blocking ribs and are integrally formed on the housing.

In some examples of the invention, the housing comprises: the oil retaining device comprises two oppositely arranged sub-shells, wherein each sub-shell is correspondingly provided with the first oil retaining piece and the second oil retaining piece.

The utility model discloses an in some examples, every the son casing is provided with the face of closing the case, first fender oil spare with the second keep off the terminal surface of oil spare all with the face parallel and level of closing the case, with two when the face of closing the case is laminated, two in the son casing the terminal surface laminating of first fender oil spare, two the second keeps off the terminal surface laminating of oil spare.

In some examples of the invention, each of the sub-housings comprises: the oil retaining device comprises a side wall and an outer ring wall, wherein the outer ring wall is arranged at the outer edge of the side wall, and the position of the outer ring wall, which corresponds to the bottom of the shell, is tangent to the first oil retaining piece and is tangent to the second oil retaining piece.

In some examples of the invention, the bottom of the first oil retaining member extends to both sides after the outer annular wall is tangent, the bottom of the second oil retaining member extends to the adjacent side after the outer annular wall is tangent to the first oil retaining member.

The utility model discloses an in some examples, it is in to lead the oilhole keep off the length direction of oil spare for rectangular form, it is in to lead the oilhole keep off the ascending size of thickness direction of oil spare for d, wherein, d satisfies the relational expression: d is more than or equal to 8mm and less than or equal to 12 mm.

According to the utility model discloses a vehicle, include: the speed reducer.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of a retarder according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a retarder according to an embodiment of the present invention;

fig. 3 is a schematic view of an oil baffle according to an embodiment of the present invention.

Reference numerals:

100-a reducer;

10-a housing; 11-an oil sump; 12-a sub-shell; 13-a containment space; 14-box closing surface; 15-side wall; 16-outer annular wall;

20-a reduction gear set; 21-input gear; 22-intermediate gear; 23-an output gear;

30-oil blocking member; 31-a first oil retainer; 32-a second oil retaining member; 33-oil guide hole.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

A decelerator 100 according to an embodiment of the present invention, which decelerator 100 is applied to a vehicle, will be described with reference to fig. 1 to 3.

As shown in fig. 1 and 3, a reducer 100 according to an embodiment of the present invention may include: the casing 10, the reduction gear set 20 and the oil blocking member 30 are arranged in the casing 10, and the reduction gear set 20 and the oil blocking member 30 form a part of the speed reducer 100 together with the casing 10, so that the structure of the speed reducer 100 can be more compact.

Referring to fig. 1 and 2, a relatively sealed accommodating space 13 is formed inside the housing 10, the reduction gear set 20 and the oil blocking member 30 are both installed in the relatively sealed accommodating space 13 inside the housing 10, so that the relatively sealed accommodating space 13 can prevent external foreign objects from entering the interior of the speed reducer 100 and damaging the reduction gear set 20 and the oil blocking member 30, which can prolong the service life of the speed reducer 100, in addition, the housing 10 should be made of a relatively firm material, so that when the speed reducer 100 is impacted or pressed by an external force, the housing 10 can protect the reduction gear set 20 and the oil blocking member 30 from being damaged, and the reliability of the structure of the speed reducer 100 can be ensured.

Further, as shown in fig. 1 and 2, at least a portion of the accommodating space 13 of the housing 10 is provided with an oil sump 11, the reduction gear set 20 and the oil blocking member 30 are at least partially disposed in the oil sump 11 of the housing 10, both the reduction gear set 20 and the oil blocking member 30 are in contact with oil, and stir the oil when the reduction gear set 20 rotates, the oil in the oil sump 11 can lubricate the rotation of the reduction gear set 20, and cool the reduction gear set 20, so that the normal operation of the reduction gear set 20 can be ensured, and the reliability of the speed reducer 100 can be improved.

As shown in connection with fig. 1, the reduction gear set 20 may basically include: an input gear 21, an intermediate gear 22, and an output gear 23, the intermediate gear 22 being disposed between the input gear 21 and the output gear 23, and the intermediate gear 22 may be engaged with the input gear 21 and the output gear 23 respectively, so that the transmission of the intermediate gear 22 between the input gear 21 and the output gear 23 can be realized, the number of teeth of the input gear 21 is smaller than that of the intermediate gear 22, the number of teeth of the intermediate gear 22 is smaller than that of the output gear 23, it will be appreciated that the number of teeth is inversely proportional to the speed of rotation, and thus, when the input gear 21 is geared with the intermediate gear 22, the rotation speed of the intermediate gear 22 is less than that of the input gear 21, when the intermediate gear 22 is in transmission with the output gear 23, the rotation speed of the output gear 23 is less than that of the intermediate gear 22, therefore, the speed reduction from the input gear 21 to the output gear 23 can be realized, and the speed reduction of the speed reducer 100 can be more stable and reliable.

The intermediate gear 22 may be divided into a first intermediate gear and a second intermediate gear, one of the first intermediate gear and the second intermediate gear is in transmission with the input gear 21, and the rotation speed of the input gear 21 is firstly reduced to a certain value, the other of the first intermediate gear and the second intermediate gear is in transmission with the output gear 23, and the rotation speed of the gear which has been reduced to the certain value is reduced again, so that the rotation speed of the gear is reduced to a target value, and the setting of the first intermediate gear and the second intermediate gear can reduce the rotation speed of the input gear 21 in stages according to the specific requirements of the speed reducer 100, so that the transmission ratio can be reasonably distributed, the wear of the speed reduction gear set 20 during high-speed rotation can be reduced, and the speed reduction of the speed reducer 100 can be more reasonably and stably performed, and the structural process of the speed reducer 100 can be optimized.

Referring to fig. 1 and 2, the oil blocking member 30 is located at the bottom of the intermediate gear 22 and/or the output gear 23, the oil blocking member 30 at least partially surrounds the intermediate gear 22 and/or the output gear 23, and the oil blocking member 30 is spaced from the intermediate gear 22 and/or the output gear 23, so that the oil blocking member 30 not only can make the structure in the inner space with a larger cavity more compact, thereby increasing the strength of the casing 10 of the reducer 100, but also the oil blocking member 30 can better wrap the intermediate gear 22 and/or the output gear 23, and relatively space the intermediate gear 22 and/or the output gear 23 from the outside, so that when the intermediate gear 22 and/or the output gear 23 rotates, the oil in the space between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 is agitated, thereby ensuring that the intermediate gear 22 and/or the output gear 23 are sufficiently lubricated and cooled by the oil, the oil stirred by the intermediate gear 22 and/or the output gear 23 is reduced, so that the energy consumption of stirring can be effectively reduced, and the efficiency of the speed reducer 100 can be improved.

In addition, the oil blocking piece 30 can wrap the intermediate gear 22 and/or the output gear 23 and can block splashed oil around when the intermediate gear 22 and/or the output gear 23 stir the oil, so that the loss of the oil can be effectively reduced, and the process structure can be optimized.

Further, as shown in fig. 3, an oil guiding hole 33 penetrating through the oil blocking member 30 is formed in the oil blocking member 30, and the oil guiding hole 33 enables oil fully lubricating and cooling the intermediate gear 22 and/or the output gear 23 between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 to flow into the outside of the oil blocking member 30 again, and to circulate in the housing 10 after being mixed with the oil outside the oil blocking member 30, so that the oil between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 is prevented, and after the intermediate gear 22 and/or the output gear 23 are lubricated and cooled, the temperature of the oil is high or more impurities affect the normal operation of the speed reducer 100, so that the oil can be discharged in time, and the reliability of the speed reducer 100 can be ensured.

In addition, as shown in fig. 3, after the oil flowing out from between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 is mixed and circulated with the external oil, the oil temperature will be effectively reduced, and the impurities in the oil will also be reduced, so the oil guiding hole 33 can make the oil which can normally cool and lubricate the outside of the oil blocking member 30 enter between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 again, and normally lubricate and cool the intermediate gear 22 and/or the output gear 23, so that the oil can be ensured to normally flow in and out between the oil blocking member 30 and the intermediate gear 22 and/or the output gear 23 on the premise that the intermediate gear 22 and/or the output gear 23 are better wrapped by the oil blocking member 30, so that the oil can normally circulate, and the oil stirred by the intermediate gear 22 and/or the output gear 23 can be normally lubricated and cooled, so that the structural reliability of the decelerator 100 can be improved.

Further, as shown in fig. 3, since the oil blocking member 30 wraps the intermediate gear 22 and the output gear 23 well, oil between the oil blocking member 30 and the intermediate gear 22 and the output gear 23 is not easy to exchange with external oil, which results in poor lubricating and cooling effects of the oil on the intermediate gear 22 and the output gear 23, the oil hole 33 is provided to allow the oil between the oil blocking member 30 and the intermediate gear 22 and the output gear 23 to freely enter and exit with the external oil, and circulates in the speed reducer 100, so that normal cooling and lubricating of the oil on the reduction gear set 20 can be ensured, and the structural reliability of the speed reducer 100 can be improved.

Therefore, the oil blocking member 30 is arranged at the bottom of the intermediate gear 22 and/or the output gear 23 in a surrounding manner, so that the strength of the shell 10 can be enhanced, the oil blocking member 30 can have good wrapping performance on the intermediate gear 22 and/or the output gear 23, the oil stirring amount during rotation of the intermediate gear 22 and/or the output gear 23 can be reduced, the oil stirring loss can be reduced, and the efficiency of the speed reducer 100 can be improved.

As shown in fig. 1 and 2, the oil blocking member 30 may mainly include: first fender oil piece 31 and second fender oil piece 32, first fender oil piece 31 sets up in the bottom of intermediate gear 22, second fender oil piece 32 sets up in the bottom of output gear 23, so can make intermediate gear 22 and output gear 23 wrap up better, thereby can make intermediate gear 22 and output gear 23 under the circumstances of guaranteeing normal work, stir less fluid, further, first fender oil piece 31 and second fender oil piece 32 all are provided with oil guide hole 33, so, the business turn over that can make the fluid of keeping off between oil piece 30 and intermediate gear 22 and the output gear 23 flows the effect better, can further promote the lubrication and the cooling effect of fluid, can prolong the life of reduction gear 100.

As shown in fig. 1 and fig. 2, the first oil blocking member 31 and the second oil blocking member 32 are both provided with arc structures, and the first oil blocking member 31 and the second oil blocking member 32 are connected to each other, specifically, the arc structures of the first oil blocking member 31 and the second oil blocking member 32 can respectively correspond to the arc shapes of the parts of the circles where the intermediate gear 22 and the output gear 23 are located, so that not only can the first oil blocking member 31 and the second oil blocking member 32 wrap the intermediate gear 22 and the output gear 23 better, but also the intermediate gear 22 and the output gear 23 can stir less oil, further reducing the energy consumption of stirring, and the arc-shaped first oil blocking member 31 and the arc-shaped second oil blocking member 32 can conform to the rotation directions of the intermediate gear 22 and the output gear 23, so that the oil flows more, thereby preventing the first oil blocking member 31 and the second oil blocking member 32 from having dead corners, and preventing the intermediate gear 22 and the output gear 23 from stirring more high-temperature and impurity oil in the dead corners, so that it cannot be discharged in time for circulation, and the structural reliability of the oil deflector 30 can be further improved.

As shown in fig. 1 and fig. 2, the first oil blocking member 31 and the second oil blocking member 32 are oil blocking ribs, the oil blocking ribs can increase the contact area of the first oil blocking member 31 and the second oil blocking member 32 with the oil blocking member 30 and the oil between the intermediate gear 22 and the output gear 23 on the premise that the size of the first oil blocking member 30 and the second oil blocking member 30 is not changed, and the oil blocking ribs can be made of a material with good thermal conductivity, so that the oil between the oil blocking member 30 and the intermediate gear 22 and the output gear 23 can be exchanged heat with external oil, the temperature of the oil can be effectively reduced, and the structural process of the oil blocking member 30 can be further improved.

In addition, the oil blocking ribs are made of a plurality of fine rib-shaped structures, so that friction between oil and the oil blocking ribs can be reduced, the oil with high density can smoothly flow on the first oil blocking piece 30 and the second oil blocking piece 30, the oil can be prevented from being stuck on the first oil blocking piece 30 and the second oil blocking piece 30 and cannot be discharged in time, and the reliability of the speed reducer 100 can be further improved. Wherein, first fender oil 30 and second fender oil 30 are integrated into one piece on casing 10, so, not only can increase the stability of being connected between first fender oil 30 and second fender oil 30 and casing 10, can promote the intensity of casing 10, can simplify the production procedure of fender oil 30 moreover, improve production efficiency.

As shown in fig. 1 and 2, the housing 10 may mainly include: two sub-casings 12 that set up relatively, two sub-casings 12 set up relatively and form the accommodation space 13 of casing 10 jointly to inject reduction gear 20's mounted position, make reduction gear 20 install and set up in accommodation space 13, not only can make things convenient for the installation and the dismantlement of reduction gear 100, can guarantee the relative independence of casing 10 moreover, when one of them sub-casing 12 takes place to damage, only need the maintenance change the sub-casing 12 that damages can practice thrift cost of maintenance.

Further, each sub-housing 12 is correspondingly provided with a first oil blocking member 31 and a second oil blocking member 32, after the two sub-housings 12 are oppositely arranged, the first oil retaining member 30 and the second oil retaining member 30 on the two sub-housings 12 are abutted against each other, the widths of the first oil retaining member 30 and the second oil retaining member 30 formed after the abutting against are respectively larger than or equal to the widths of the intermediate gear 22 and the output gear 23, thus, the first oil retaining member 30 and the second oil retaining member 30 abutting each other on the two sub-housings 12 are tightly attached, the intermediate gear 22 and the output gear 23 can be better wrapped respectively, oil can be prevented from flowing into the oil blocking member 30 from the abutting gap between the first oil blocking member 30 and the second oil blocking member 30 abutting each other on the two sub-housings 12, less oil can be stirred by the intermediate gear 22 and the output gear 23, energy consumption for stirring the oil can be reduced, and efficiency of the speed reducer 100 can be improved.

Referring to fig. 1 and 2, each sub-housing 12 is provided with a box closing surface 14, the end surfaces of the first oil blocking member 31 and the second oil blocking member 32 are flush with the box closing surface 14, when the two sub-housings 12 are arranged relatively, the box closing surfaces 14 on the two sub-housings 12 are tightly attached to each other, the end surfaces of the two first oil blocking members 31 in the two sub-housings 12 are also tightly attached to each other at this time, correspondingly, the end surfaces of the two second oil blocking members 32 are also attached to each other at this time, so that the installation and the arrangement of the speed reducer 100 are facilitated, the box closing surfaces 14 on the two sub-housings 12 are only required to be tightly attached to each other relatively, so that the tight attachment of the first oil blocking members 31 and the second oil blocking members 32 can be realized, a certain fool-proof effect is achieved, and the process structure of the speed reducer 100 can be optimized.

As shown in fig. 1 and 2, each sub-housing 12 includes: the oil retaining structure comprises a side wall 15 and an outer ring wall 16, wherein the outer ring wall 16 is arranged at the outer edge of the side wall 15, the position of the outer ring wall 16 corresponding to the bottom of the shell 10 is tangent to the first oil retaining element 31, and the position of the outer ring wall 16 corresponding to the bottom of the shell 10 is tangent to the second oil retaining element 32, so that the structure of the oil retaining element 30 cannot be interrupted by the outer ring wall 16 on the premise that the first oil retaining element 31 and the second oil retaining element 32 are stably and firmly connected with the outer ring wall 16 of the shell 10, the structural stability of the oil retaining element 30 is damaged, and the structural reliability of the oil retaining element 30 can be improved.

As shown in fig. 1 to 3, the bottom of the first oil blocking member 31 is tangent to the outer ring wall 16 and extends to both sides, the bottom of the second oil blocking member 32 is tangent to the outer ring wall 16 and extends to the side adjacent to the first oil blocking member 31 and interconnects with the side adjacent to the first oil blocking member 31, the first oil blocking member 31 and the second oil blocking member 32 extend along the rotation direction of the intermediate gear 22 and the output gear 23 with respect to the bottom, respectively, so that the first oil blocking member 31 and the second oil blocking member 32 can better conform to the shapes of the intermediate gear 22 and the output gear 23, and not only can the first oil blocking member 31 and the second oil blocking member 32 better wrap the intermediate gear 22 and the output gear 23, so that the amount of oil stirred by the intermediate gear 22 and the output gear 23 is less, the energy consumption of stirring is reduced, but also when the intermediate gear 22 and the output gear 23 rotate, the oil blocking member 30 can better block splashes around, and the splashed oil is caused to flow into the oil pool 11 again in the opposite direction to the direction in which the oil blocking member 30 extends, preventing the oil from being lost, and improving the efficiency of the decelerator 100.

Because the distance between the outer ring wall 16 and the output gear 23, which is far away from one side of the first oil retaining member 30 after the bottom of the second oil retaining member 32 is tangent to the outer ring wall 16, is smaller, the second oil retaining member 30 does not need to be arranged on one side, which is far away from the first oil retaining member 30 after the bottom of the second oil retaining member 32 is tangent to the outer ring wall 16, so the design is ingenious, on the premise that the intermediate gear 22 and the output gear 23 are well wrapped by the oil retaining member 30, the arrangement length of the second oil retaining member 30 is reduced, the production flow can be simplified, and the production cost is saved.

As shown in fig. 3, the oil guiding hole 33 is elongated in the length direction of the oil blocking member 30, specifically, the oil guiding hole 33 of the first oil blocking member 30 extends to both sides with the position where the first oil blocking member 30 is tangent to the outer annular wall 16 as the center, and the oil guiding hole 33 of the second oil blocking member 30 extends to the extending direction of the second oil blocking member 32 with the position where the second oil blocking member 30 is tangent to the outer annular wall 16 as the starting point, so that the oil guiding hole 33 can be more compliant with the oil stirring direction, the oil discharging efficiency can be improved, and the oil splashed above the oil guiding hole 33 can automatically flow back to the oil guiding hole 33 due to the weight of the oil guiding hole 33, thereby preventing the oil from being stuck to the oil blocking member 30.

Further, as shown in fig. 3, the dimension of the oil guide hole 33 in the thickness direction of the oil blocking member 30 is d, where d satisfies the relation: d is more than or equal to 8mm and less than or equal to 12mm, the oil guide hole 33 needs to penetrate through the oil blocking member 30 to realize the communication of oil among the oil blocking member 30, the intermediate gear 22 and the output gear 23, so the value of the dimension d of the oil guide hole 33 in the thickness direction of the oil blocking member 30 changes along with the change of the thickness of the oil blocking member 30, thus the dimension d of the oil guide hole 33 in the thickness direction of the oil blocking member 30 can adapt to more oil blocking members 30, and the applicability of the oil blocking member 30 can be improved. For example, d is 10 mm.

According to the utility model discloses vehicle can include: the retarder 100 of the above embodiment, the retarder 100 can be applied to a vehicle, and the retarder 100 stirs less oil in the rotation process, so that not only can the energy consumption of the vehicle be reduced, but also the service life of the vehicle can be prolonged.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A speed reducer, comprising:

the oil tank comprises a shell, wherein an accommodating space is formed in the shell, and at least one part of the accommodating space is arranged as an oil tank;

a reduction gear set disposed in the accommodation space and including: an input gear, an intermediate gear and an output gear, the intermediate gear transmitting between the input gear and the output gear;

the oil blocking piece is at least partially arranged in an oil pool of the shell, the oil blocking piece is positioned at the bottom of the intermediate gear and/or the output gear and at least partially surrounds the intermediate gear and/or the output gear, and an oil guide hole penetrating through the oil blocking piece is formed in the oil blocking piece.

2. The decelerator of claim 1, wherein the oil stop includes: the first oil retaining piece is located at the bottom of the intermediate gear, the second oil retaining piece is located at the bottom of the output gear, and the first oil retaining piece and the second oil retaining piece are provided with oil guide holes.

3. The speed reducer of claim 2, wherein the first oil retainer and the second oil retainer are each provided in an arc-shaped configuration and are connected.

4. The speed reducer of claim 2, wherein the first oil retainer and the second oil retainer are each an oil retaining rib and are integrally formed on the housing.

5. The speed reducer of claim 2, wherein the housing comprises: the oil retaining device comprises two oppositely arranged sub-shells, wherein each sub-shell is correspondingly provided with the first oil retaining piece and the second oil retaining piece.

6. The reducer according to claim 5, wherein each of the sub-housings is provided with a box-closing surface, and end surfaces of the first oil blocking member and the second oil blocking member are flush with the box-closing surface, so that when the two box-closing surfaces are fitted, end surfaces of the two first oil blocking members and end surfaces of the two second oil blocking members in the two sub-housings are fitted.

7. The reducer of claim 5, wherein each of the sub-housings comprises: the oil retaining device comprises a side wall and an outer ring wall, wherein the outer ring wall is arranged at the outer edge of the side wall, and the position of the outer ring wall, which corresponds to the bottom of the shell, is tangent to the first oil retaining piece and is tangent to the second oil retaining piece.

8. The speed reducer of claim 7, wherein a bottom portion of the first oil retaining member extends tangentially to the outer annular wall to both sides, and a bottom portion of the second oil retaining member extends tangentially to the outer annular wall to a side adjacent to the first oil retaining member.

9. A decelerator according to claim 1, wherein the oil guide hole is elongated in a length direction of the oil retainer, and a dimension of the oil guide hole in a thickness direction of the oil retainer is d, where d satisfies the relation: d is more than or equal to 8mm and less than or equal to 12 mm.

10. A vehicle, characterized by comprising: a decelerator according to any one of claims 1 to 9.

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