CN218267150U - Reducer housing exhaust structure, main reducer and vehicle - Google Patents

Abstract

The utility model provides a reducer casing exhaust structure, main reducer and vehicle, reducer casing exhaust structure includes the shell body, and the inner wall top of shell body is equipped with the exhaust passage who communicates with the external world, and the inner wall top of shell body still is equipped with the oil passing hole, and the oil passing hole has the joint portion that communicates with the exhaust passage upwards; wherein, cross the oilhole and extend along the inner chamber circumference of shell body, and cross the both ends of oilhole and extend and the downwarping from the joint portion is reverse respectively. The utility model provides a reducer casing exhaust structure, main reducer and vehicle can show prevention of seepage oil effect and the reliability that improves the reduction gear; because exhaust passage and oil passing hole directly set up at the inner wall top of shell body, consequently do not occupy the inside effective space of shell body, be favorable to reducing the size of reduction gear casing, need not additionally to set up other oil baffle members simultaneously, consequently can reduce material cost and processing equipment process to reduce the cost of reduction gear.

Description

Reducer housing exhaust structure, main reducer and vehicle

Technical Field

The utility model belongs to the technical field of vehicle reduction gear, concretely relates to reduction gear shell exhaust structure, main reducer and vehicle.

Background

The reduction gear is vehicle key part, and in the vehicle went, because the continuous rotatory function of reduction gear internal gear can arouse temperature rising in the reduction gear, atmospheric pressure increase, for guaranteeing that reduction gear internal pressure is stable, alleviates the sealing member pressure-bearing, sets up ventilation structure usually on reduction gear housing and carries out the pressure release, but because gear oil splashes along with the internal gear is rotatory, the gear oil that splashes discharges through ventilation structure along with high-pressure gas very easily to lead to the oil impregnate phenomenon.

At present, in order to solve the problem of oil leakage of a speed reducer, one mode is to cast a bulge below an air vent on the inner wall of a shell of the speed reducer, mount a baffle plate in the opening direction of the bulge by using a bolt to shield splashed gear oil, and simultaneously exhaust and release pressure by using a gap reserved between the baffle plate and the bulge; another way is to move the breather structure to a position away from the rotation of the gear, so that the splashed gear oil cannot reach the position of the breather structure. The disadvantages of the two methods are that the oil leakage prevention reliability is poor, the size of the reducer shell is increased, and the machining and assembling procedures are increased, so that the reduction cost is reduced, and the spatial layout of the peripheral parts of the reducer is influenced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a reduction gear shell exhaust structure, main reducer and vehicle aims at improving the prevention of seepage oil reliability of reduction gear, reduces the reduction gear size and reduction in production equipment cost.

In order to achieve the above object, the utility model adopts the following technical scheme: the first aspect provides a speed reducer shell exhaust structure which comprises a shell body, wherein an exhaust passage communicated with the outside is formed in the top of the inner wall of the shell body, and an oil passing hole is further formed in the top of the inner wall of the shell body and provided with a combination part communicated with the exhaust passage upwards; wherein, cross the oilhole and extend along the inner chamber circumference of shell body, and cross the both ends of oilhole and extend and the downward bending from the joint portion is reverse respectively.

With reference to the first aspect, in a possible implementation manner, the hole diameter of the oil passing hole gradually decreases from the two ends of the oil passing hole to the joint portion, and the hole diameter of one end, suitable for the gear oil to rotate, of the oil passing hole is smaller than that of the other end of the oil passing hole.

In some embodiments, the housing body is provided with an exhaust hole extending downwards from the outer wall of the housing body, the housing body is further provided with a vent cavity extending upwards from the inner wall of the housing body, the vent cavity is communicated with the exhaust hole to form an exhaust channel, and the cavity bottom of the vent cavity is communicated with the combining part; wherein, the chamber bottom of the ventilation chamber is an inclined plane suitable for oil to flow back to the oil through hole.

In some embodiments, at least two oil blocking bulges are arranged on the cavity wall of the ventilation cavity, the oil blocking bulges are distributed at intervals up and down, and the oil blocking bulges are distributed along the opposite direction of the ventilation cavity in a staggered way.

In some embodiments, the oil blocking protrusion extends obliquely downward from the wall of the ventilation cavity.

For example, the included angle between the inclined direction of the oil blocking bulge and the horizontal plane is more than or equal to 10 degrees, and the extending length of the oil blocking bulge is 5-10 mm.

In one possible implementation manner, the shell body comprises a front shell and a rear shell which are fixedly connected in a sealing manner, and the connecting surface of the front shell and the rear shell is a vertical surface; wherein, one of the front shell and the rear shell is provided with an exhaust hole and a first half cavity communicated with the exhaust hole; the other one of the front shell and the rear shell is provided with a second half cavity, and the second half cavity and the first half cavity are involutory to form a ventilation cavity; a part of the oil passing hole is positioned on the front shell, and the rest part of the oil passing hole is positioned on the rear shell.

Illustratively, oil guide bulges extending downwards are arranged on the cavity walls of the first half cavity and the second half cavity, the extending ends of the oil guide bulges are enclosed into connecting holes, and the ventilation cavity is communicated with the oil passing holes through the connecting holes.

The utility model provides a reducer case exhaust structure's beneficial effect lies in: compared with the prior art, the utility model discloses reducer housing exhaust structure, through set up the oilhole at the inner wall top of shell body, make oilhole and exhaust passage intercommunication can exhaust the pressure release, because the both ends of oilhole respectively from the joint portion reverse extension and the downward bending that communicate with exhaust passage, therefore the joint portion is located the peak of oilhole, on the one hand, most received the effect of blocking of oilhole crooked route and can't reach the joint portion and get into exhaust passage after the gear oil that splashes gets into one end of oilhole when gear revolve, but directly flow back into the shell body along the pore wall of oilhole, all the other small parts gear oil that get into in the oilhole can reach the joint portion, but the speed of splashing also can be reduced by the influence that the bending blocked at this moment, therefore basically can't get into exhaust passage upwards, but directly continue to move ahead and flow back into the shell body from the other end of oilhole again, and to the extremely few parts gear oil that get into in the exhaust passage upwards also because of upward power is not enough and flow back to the oilhole again to the oilhole to the shell body inside again, and then flow back to the shell body inside, compare in the mode that sets up the baffle or move, can show the oil leakage proof effect and reliability is improved; on the other hand, exhaust passage and oil passing hole directly set up at the inner wall top of shell body, do not occupy the inside effective space of shell body, are favorable to reducing the size of reduction gear casing, need not additionally to set up other fender oil component simultaneously, consequently can reduce material cost and processing equipment process to reduce the cost of reduction gear.

In a second aspect, the embodiment of the present invention further provides a main reducer, which includes the above reducer casing exhaust structure, wherein a vent valve is connected to the opening of the exhaust passage on the casing body. The embodiment of the utility model provides a main reducer has the same beneficial effect with above-mentioned reduction gear housing exhaust structure, no longer gives unnecessary details here.

The third aspect, the embodiment of the utility model provides a still provides a vehicle, including above-mentioned main reducer, have the same beneficial effect with above-mentioned main reducer, no longer describe herein.

Drawings

Fig. 1 is a schematic structural view of a reducer case exhaust structure provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of the structure at A in FIG. 1;

fig. 3 is a schematic sectional view taken along line B-B in fig. 2.

In the figure: 10. a housing body; 11. a front housing; 12. a rear housing; 20. an exhaust passage; 21. an exhaust hole; 22. a vent lumen; 2201. a first half-cavity; 2202. a second cavity half; 221. an oil blocking bulge; 222. oil guide bulges; 223. connecting holes; 30. an oil passing hole; 40. a vent valve.

Detailed Description

In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention more clearly understood, the following description is made in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship as shown in the figures, which are meant only to facilitate the description of the invention and to simplify the description, and are not meant to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically defined otherwise.

Referring to fig. 1 to 3, an exhaust structure of a reducer case according to the present invention will be described. The exhaust structure of the speed reducer shell comprises a shell body 10, wherein an exhaust channel 20 communicated with the outside is arranged at the top of the inner wall of the shell body 10, an oil passing hole 30 is also arranged at the top of the inner wall of the shell body 10, and the oil passing hole 30 is provided with a combination part communicated with the exhaust channel 20 upwards; wherein, the oil passing hole 30 extends along the circumferential direction of the inner cavity of the shell body 10, and both ends of the oil passing hole 30 extend in opposite directions from the joint portion and are bent downward, respectively.

It should be noted that in the present embodiment, the exhaust passage 20 and the oil passing hole 30 can be cast together in the casting process of the housing body 10, and no post-processing is needed, and for the oil passing hole 30, it may be protruded toward the inside of the gap between the inner wall of the housing body 10 and the gear without affecting the normal operation of the gear inside the housing body 10, or it may be completely formed inside the inner wall of the housing body 10.

The oil seepage prevention principle of the exhaust structure of the speed reducer shell provided by the embodiment is as follows: when the gear rotates, the gear oil is driven to generate rotary splashing, most of the splashed gear oil cannot reach a joint part at the highest point in the hole and enter the exhaust channel 20 under the blocking action of the bent path of the oil passing hole 30 after entering one end of the oil passing hole 30, but directly flows back into the shell body 10 along the hole wall of the oil passing hole 30, the rest small part of the gear oil entering the oil passing hole 30 can reach the joint part, but the splashing speed is reduced under the influence of bending blocking at the moment, so that the gear oil cannot enter the exhaust channel 20 upwards basically, but directly continues to move forwards and flows back into the shell body 10 from the other end of the oil passing hole 30, and a small part of the gear oil entering the exhaust channel 20 upwards flows back to the oil passing hole 30 again under the action of gravity due to insufficient upward power, and then flows back into the shell body 10.

Compared with the prior art, the exhaust structure of the speed reducer shell provided by the embodiment has the advantages that the oil passing hole 30 is formed in the top of the inner wall of the shell body 10, so that the oil passing hole 30 is communicated with the exhaust channel 20 to perform exhaust and pressure relief, and because two ends of the oil passing hole 30 respectively extend reversely from the joint part communicated with the exhaust channel 20 and bend downwards, the joint part is located at the highest point of the oil passing hole 30, the splashing speed of gear oil can be reduced by utilizing the bending and extending length of the oil passing hole 30, so that the gear oil entering the oil passing hole 30 flows back into the shell body 10 from two ends of the oil passing hole 30, and compared with a mode of arranging a baffle or moving the position of the exhaust channel 20, the oil leakage prevention effect and reliability can be remarkably improved; on the other hand, the exhaust passage 20 and the oil passing hole 30 are directly arranged on the top of the inner wall of the shell body 10, so that the effective space inside the shell body 10 is not occupied, the size of the shell of the speed reducer is reduced, and meanwhile, other oil blocking members do not need to be additionally arranged, so that the material cost and the processing and assembling procedures can be reduced, and the cost of the speed reducer is reduced.

In some embodiments, referring to fig. 1, the hole diameter of the oil passing hole 30 is gradually reduced from both ends thereof to the joint portion, and the hole diameter of one end of the oil passing hole 30 adapted to the gear oil for rotation enters is smaller than that of the other end thereof. In the actual working process of the speed reducer, gear oil which is driven by a gear in the speed reducer to rotate enters the oil passing hole 30 from one end, the aperture of the oil passing hole 30 is gradually reduced from the end part to the joint part, so that the resistance of the gear oil entering the oil passing hole 30 is increased, the gear oil reaching the joint part does not have the power of entering the exhaust passage 20 upwards, but directly returns to the shell body 10 again from the other end of the oil passing hole 30 through the joint part, in addition, the aperture of the oil passing hole 30 from the joint part to the other end (oil outlet end) is gradually increased, so that the gear oil passing the oil passing hole 30 does not have the resistance basically after passing the joint part, the gear oil can smoothly return to the inside of the shell body 10 along the gradually increased oil passing hole 30, the gear oil is prevented from directly entering the exhaust passage 20 upwards from the joint part due to the large resistance after passing the joint part, and the oil seepage prevention effect is improved.

In some embodiments, referring to fig. 2, the case body 10 is provided with a vent hole 21 extending downward from an outer wall thereof, the case body 10 is further provided with a vent chamber 22 extending upward from an inner wall thereof, the vent chamber 22 communicates with the vent hole 21 to form the vent passage 20, and a chamber bottom of the vent chamber 22 communicates with the joint portion; wherein, the bottom of the ventilation cavity 22 is an inclined plane suitable for the oil to flow back into the oil passing hole 30.

It should be noted that the function of the vent hole 21 is not only for ventilation but also for installing the vent valve 40, and the vent cavity 22 is equivalent to expanding a section of area of the vent hole 21 close to the inside of the housing body 10 to form a cavity, so as to deal with a very small part of gear oil entering the vent channel 20, after the gear oil enters the vent cavity 22, the gear oil collides with the cavity wall of the vent cavity 22 and stays in the vent cavity 22, and flows back to the oil passing hole 30 along the inclined cavity bottom of the vent cavity 22 under the action of gravity, and then flows back to the inside of the housing body 10 along the oil passing hole 30, compared with the method that a hole is used as the vent channel 20 alone, the oil leakage prevention effect can be further improved.

In order to further improve the reliability of oil leakage prevention, please refer to fig. 2 and fig. 3, in this embodiment, at least two oil blocking protrusions 221 are disposed on the cavity wall of the vent cavity 22, each oil blocking protrusion 221 is spaced up and down, and each oil blocking protrusion 221 is distributed along the peripheral wall of the vent cavity 22 in an opposite staggered manner. By means of the oil blocking protrusions 221 which are distributed in a vertically spaced and circumferentially staggered mode, the oil blocking protrusions 221 can be matched to form a blocking area covering the whole cross section in the vent cavity 22, gear oil entering the vent cavity 22 can be at least blocked by one oil blocking protrusion 221 to rebound downwards, and accordingly the gear oil can be prevented from continuously entering the vent hole 21 upwards.

Specifically, as shown in fig. 2, the oil blocking projection 221 extends obliquely downward from the wall of the vent chamber 22. The oil blocking protrusion 221 is inclined downwards, so that the gear oil passing over the oil blocking protrusion 221 from the side of the oil blocking protrusion can flow back downwards along the inclined top surface after falling to the top surface of the oil blocking protrusion, and meanwhile, the gear oil blocked by the bottom surface of the oil blocking protrusion 221 can rebound towards the side wall and the bottom wall of the vent cavity 22, so that the gear oil is prevented from moving upwards from the side of the oil blocking protrusion 221 again after rebounding, and the oil blocking effect and the backflow guiding effect of the oil blocking protrusion 221 are ensured.

In this embodiment, the included angle between the inclined direction of the oil blocking protrusion 221 and the horizontal plane is greater than or equal to 10 °; the oil-blocking protrusion 221 has an extension length of 5 to 10mm.

In some possible implementations, referring to fig. 1 and 2, the housing body 10 includes a front housing 11 and a rear housing 12 that are hermetically and fixedly connected, and a connection surface of the front housing 11 and the rear housing 12 is a vertical surface; wherein, one of the front shell 11 and the rear shell 12 is provided with an exhaust hole 21, and a first half cavity 2201 communicated with the exhaust hole 21; a second half cavity 2202 is arranged on the other of the front shell 11 and the rear shell 12, and the second half cavity 2202 and the first half cavity 2201 are formed into a ventilation cavity 22 in an involutory mode; a part of the oil passing holes 30 is located on the front housing 11 and the remaining part is located on the rear housing 12.

It should be understood that the connection surface of the front housing 11 and the rear housing 12 should pass through the axis of the driving shaft of the speed reducer, in order to process half-arc holes on the front housing 11 and the rear housing 12 respectively, after assembly, the two half-arc holes are relatively buckled to form a driving shaft hole, thereby facilitating assembly, on this basis, the exhaust hole 21 is directly arranged on the front housing 11 or the rear housing 12, and the connection surface of the front housing 11 and the rear housing 12 is respectively and integrally formed with a first half cavity 2201 and a second half cavity 2202, meanwhile, a part of the oil passing holes 30 are respectively formed on the inner housing wall, after assembly, the first half cavity 2201 and the second half cavity 2202 are buckled to form an air vent cavity 22, and meanwhile, the two parts of the oil passing holes 30 are combined to form a whole, which has the advantages of being convenient in processing and capable of reducing the processing cost.

Optionally, in this embodiment, as shown in fig. 2, oil guide protrusions 222 extending downward are disposed on the cavity walls of the first half cavity 2201 and the second half cavity 2202, an extending end of each oil guide protrusion 222 is enclosed to form a connecting hole 223, and the ventilation cavity 22 is communicated with the oil passing hole 30 through the connecting hole 223. Utilize two oil guide protrusion 222 to enclose into connecting hole 223 to make the chamber bottom of breather chamber 22 form funnel-shaped throat structure, on the one hand can get into the backward flow of the gear oil in breather chamber 22 and get into oil passing hole 30, on the other hand lies in utilizing the blocking effect of oil guide protrusion 222 to separate the fender to the gear oil in oil passing hole 30, thereby reduces the oil mass that gets into in breather chamber 22, promotes the promotion of antiseep effect.

Based on the same inventive concept, with reference to fig. 1 to 3, the embodiment of the present application further provides a main reducer and a vehicle using the same, wherein the main reducer includes the reducer casing exhaust structure, and a vent valve 40 is connected to a mouth of the exhaust passage 20 on the casing body 10.

Compared with the prior art, the main speed reducer and the vehicle provided by the embodiment have the advantages that the main speed reducer adopts the speed reducer shell exhaust structure, so that the oil seepage prevention effect and reliability can be obviously improved; the exhaust passage 20 and the oil passing hole 30 are directly arranged at the top of the inner wall of the shell body 10, so that the effective space in the shell body 10 is not occupied, the size of the shell of the speed reducer is reduced, and other oil blocking members do not need to be additionally arranged, so that the material cost and the processing and assembling procedures can be reduced, and the cost of the speed reducer is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. The exhaust structure of the shell of the speed reducer is characterized by comprising a shell body (10), wherein an exhaust passage (20) communicated with the outside is formed in the top of the inner wall of the shell body (10), an oil passing hole (30) is further formed in the top of the inner wall of the shell body (10), and the oil passing hole (30) is provided with a combination part communicated with the exhaust passage (20) upwards;

the oil passing hole (30) extends along the circumferential direction of the inner cavity of the shell body (10), and two ends of the oil passing hole (30) extend reversely from the joint part and are bent downwards.

2. The reducer case venting structure according to claim 1, wherein the hole diameter of the oil passing hole (30) is gradually reduced from both ends thereof toward the joint portion, and the hole diameter of the oil passing hole (30) at one end adapted to the entrance of the rotating gear oil is smaller than the hole diameter at the other end thereof.

3. The decelerator housing exhaust structure according to claim 1, wherein the housing body (10) is provided with an exhaust hole (21) extending downward from an outer wall thereof, the housing body (10) is further provided with a vent chamber (22) extending upward from an inner wall thereof, the vent chamber (22) communicates with the exhaust hole (21) to form the exhaust passage (20), and a chamber bottom of the vent chamber (22) communicates with the combining portion;

the bottom of the ventilation cavity (22) is an inclined plane suitable for oil to flow back into the oil passing hole (30).

4. The vent structure of a reducer case according to claim 3, wherein at least two oil-blocking protrusions (221) are provided on the wall of the vent chamber (22), each oil-blocking protrusion (221) is spaced up and down, and each oil-blocking protrusion (221) is staggered along the opposite direction of the vent chamber (22).

5. The decelerator housing exhaust structure according to claim 4, wherein the oil blocking projection (221) extends obliquely downward from the cavity wall of the breather cavity (22).

6. The exhaust structure of the reducer case according to claim 4, wherein an included angle between the inclined direction of the oil blocking protrusion (221) and a horizontal plane is not less than 10 degrees, and the extending length of the oil blocking protrusion (221) is 5-10 mm.

7. The reducer case venting structure according to claim 3, wherein the case body (10) includes a front case (11) and a rear case (12) which are hermetically and fixedly connected, and a connection surface of the front case (11) and the rear case (12) is a vertical surface; wherein one of the front shell (11) and the rear shell (12) is provided with the exhaust hole (21) and a first half cavity (2201) communicated with the exhaust hole (21); a second half cavity (2202) is arranged on the other one of the front shell (11) and the rear shell (12), and the second half cavity (2202) is formed into the ventilation cavity (22) by being combined with the first half cavity (2201); a part of the oil passing hole (30) is located on the front housing (11), and the remaining part is located on the rear housing (12).

8. The exhaust structure of the speed reducer casing as recited in claim 7, wherein the wall of the first half cavity (2201) and the wall of the second half cavity (2202) are provided with oil guide protrusions (222) extending downwards, the extending end of each oil guide protrusion (222) is enclosed to form a connecting hole (223), and the ventilation cavity (22) is communicated with the oil passing hole (30) through the connecting hole (223).

9. Final drive, characterized in that it comprises a reducer case venting structure according to any of claims 1 to 8, wherein a breather valve (40) is connected to the case body (10) at the mouth of the venting channel (20).

10. Vehicle, characterized in that it comprises a final drive according to claim 9.

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