CN206112034U - Lubricating structure of high -order gear - Google Patents

Abstract

The utility model provides a lubricating structure for a high-position gear of a power take-off, which includes a housing, a driving gear, a transition gear and an output gear that are arranged in the housing and meshed in sequence, and also include an oil supply device. The output gear is located at the Above the side of the transition gear, the oil supply device is located at a position corresponding to the lower part of the output gear. By arranging the oil supply device at a position corresponding to the lower part of the output gear, especially on the housing corresponding to the position of the meshing point between the output gear and the transition gear, and defining the rotation direction of the output gear, by The centrifugal force generated by the rotation of the output gear guides the lubricating oil to lubricate the driving gear and the corresponding bearings. Compared with the traditional technical solution of setting an oil circuit on the housing, the structure and process are simple, the processing difficulty is low, and the lubricating effect is relatively good.

Description

A lubricating structure for high-position gears

technical field

The utility model relates to a lubricating structure, in particular to a lubricating structure for a high gear of a power take-off.

Background technique

On special vehicles such as excavators, it is not only necessary to provide power for the engine to drive the vehicle, but also to provide part or all of the power for driving other components, which requires the installation of a power take-off on the engine of such special vehicles.

A traditional power take-off usually includes a driving gear, a transition gear and an output gear meshing in sequence, and a lubricating structure for lubricating each gear, wherein the lubricating structure is usually relatively complicated. For example, a Chinese utility model patent with the publication number CN204226002U discloses an engine power take-off with a built-in lubricating oil passage, including a housing, a shaft gear, an oil chamber, a front bearing, and a rear bearing. There is an oil inlet passage directly leading to the oil chamber on the platform, and the outer port of the oil inlet passage is closed by a sealing plug assembly. There is a transition oil passage leading to the oil inlet passage on the front end of the boss, and the transition oil passage is connected with the rear gear chamber. corresponding to the oil outlet. The oil inlet passage is stepped, and the diameter of the inner oil inlet passage close to the oil chamber is 2-4mm, and the diameter of the outer oil inlet passage is 7-9mm. The sealing plug assembly includes a plug and an O-ring. The transitional oil passage and the oil outlet of the rear gear chamber are connected through an assembly relationship, and the oil flows through the oil outlet of the rear gear chamber, the transition oil passage, and the stepped oil inlet in sequence, and then sprays into the oil cavity in the power take-off housing, thereby Lubricate the bearings in the dynamometer assembly. However, since the casing of the power take-off is generally a casting, the process of arranging the oil passage in the casting is relatively complicated, the processing is relatively difficult, and the lubricating effect also needs to be improved.

In view of this, the applicant has carried out in-depth research on the lubricating structure of the power take-off, and then this case arises.

Utility model content

The purpose of the utility model is to provide a lubricating structure for a high-position gear of a power take-off with simple structure and process, low processing difficulty and relatively good lubricating effect.

In order to achieve the above object, the utility model adopts the following technical solutions:

A lubricating structure for a high-position gear of a power take-off, including a housing, a driving gear, a transition gear, and an output gear that are arranged in the housing and meshed in sequence, and also include an oil supply device, and the output gear is located at the transition gear. Above the side, the oil supply device is located at a position corresponding to the lower part of the output gear.

As an improvement of the utility model, the oil supply device is an oil nozzle, and the oil injection nozzle is arranged on the housing at a position corresponding to the meshing point between the output gear and the transition gear , the injection direction of the fuel injector is towards the meshing point between the output gear and the transition gear, and the rotation direction of the output gear is from the lower end point of the output gear through the output gear and the transition gear. The meshing point between the transition gears is in the direction of the upper end point of the output gear.

As an improvement of the utility model, the driving gear is located under the side of the transition gear.

As an improvement of the present utility model, the driving gear and the output gear are respectively located on both sides of the transition gear.

The utility model also provides a lubricating structure for high-position gears with simple structure and process, low processing difficulty and relatively good lubricating effect. The structure adopts the following technical scheme:

A lubricating structure for high-position gears, which includes a second gear and a first gear meshed in sequence, and is characterized in that it also includes an oil supply device, the first gear is located above the side of the second gear, and the oil supply device Located at a position corresponding to the lower portion of the first gear.

As an improvement of the present utility model, the oil supply device is an oil nozzle, and the oil injection nozzle is arranged at a position corresponding to the meshing point between the first gear and the second gear, so The injection direction of the fuel injector is towards the meshing point between the first gear and the second gear, and the rotation direction of the first gear is from the lower end point of the first gear through the first gear and the second gear. The meshing point between the second gears faces the upper end of the first gears.

By adopting the above technical scheme, the utility model has the following beneficial effects:

By arranging the oil supply device at a position corresponding to the lower part of the output gear, especially on the housing corresponding to the position of the meshing point between the output gear and the transition gear, and defining the rotation direction of the output gear, by The centrifugal force generated by the rotation of the output gear guides the lubricating oil to lubricate the driving gear and the corresponding bearings. Compared with the traditional technical solution of setting an oil circuit on the housing, the structure and process are simple, the processing difficulty is low, and the lubricating effect is relatively good.

Description of drawings

Fig. 1 is the structural representation of the power take-off of the utility model structure contact;

Fig. 2 is a front structural schematic diagram of a compact power take-off of the present invention, in which a partial section is shown in the figure, and an engine crankshaft and a flywheel are connected;

Fig. 3 is a schematic diagram of the self-lubricating structure of the compact power take-off of the utility model, and the arrows in the figure indicate the flow direction of the lubricating fluid.

The markings in each figure correspond to the following:

10-housing; 20-driving gear;

30-transition gear; 31-transition axle;

32-bearing; 33-bearing end cover;

34-retaining ring; 40-output gear;

41-the first spline hole; 51-bolt;

52-location pin; 53-crankshaft;

54-flywheel; 61-elastomer;

62-the second spline hole; 63 angular contact bearing;

71-fuel injection nozzle; 72-oil storage cavity;

73 - lubrication channel;

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Embodiment one.

As shown in Fig. 1 and Fig. 2, the power take-off with compact structure provided by this embodiment includes a housing 10 and a driving gear 20, a transition gear 30 and an output gear 40 arranged in the housing 10 and engaged in sequence, wherein the output The gear 40 is located above the transition gear 30 , the drive gear 20 is located below the transition gear 30 , and the drive gear 20 and the output gear 40 are respectively located on both sides of the transition gear 30 .

A connection structure is provided between the driving gear 20 and the engine, that is, the connection structure between the power take-off and the engine. Specifically, the power take-off of this embodiment also includes bolts 51 and positioning pins 52, and the driving gear 20 is respectively provided with perforations and positioning holes. The number of perforations can be set according to actual needs. In this embodiment, there are five perforations. Of course, there are five bolts 51 corresponding thereto, and the five through holes are arranged on the driving gear 20 with the axis of the driving gear 20 as the center circumference, and there is only one positioning hole, which is located between two of the through holes. Each bolt 51 is inserted on each perforation respectively, and the two ends of each bolt are respectively connected with the flywheel and the crankshaft of the engine. superior.

Correspondingly, the engine connected with the power take-off of the present embodiment needs to have a crankshaft 53 and a flywheel 54, and the flywheel 54 is also provided with perforations. There are also five perforations corresponding to the perforations on the driving gear 20. Offer five threaded holes corresponding to the perforations on the flywheel 54 or the driving gear 20 one by one, that is, each threaded hole is also arranged on the crankshaft 53 with the axis of the driving gear 20 as the center circle. The positions corresponding to the positioning holes on the driving gear 20 are also provided with positioning holes, that is, the corresponding positions of the crankshaft 53, the flywheel 54 and the driving gear 20 are respectively provided with positioning holes. The crankshaft 53 of the engine usually has five circumferentially arranged threaded holes. In actual production, it is only necessary to provide perforations on the flywheel 54 and the driving gear 20 according to the positions of the threaded holes on the crankshaft 53 . Each bolt 51 passes through the corresponding perforation on the flywheel 54 and the driving gear 20 in turn and is screwed on the corresponding threaded hole, and the positioning pin 52 is inserted in turn on the positioning holes of the flywheel 54, the driving gear 20 and the crankshaft 53, so as to realize engine rotation. The connection with the power take-off has a compact structure and good stability.

The transition gear 30 is installed in the housing 10 through the transition shaft 31, that is, the power take-off of this embodiment also includes a transition shaft 31 fixed in the housing 10, the transition shaft 31 is a trapezoidal shaft, and the transition shaft 31 is sleeved with The bearing 32 and the bearing end cover 33 , wherein the bearing 32 is located between the bearing end cover 33 and the stepped surface of the transition wheel shaft 31 , and the transition gear 30 is sleeved on the bearing 32 .

Preferably, in this embodiment, there are two bearings 32, both of which are cylindrical roller bearings, and a retaining ring 34 fixed on the transition gear 30 is arranged between the two bearings 32, and the retaining ring 34 can connect the two The bearings 32 are separated from each other, which can also prevent the transition gear 30 from axially moving in the process of rotation.

The output gear 40 is installed in the housing 10 through the angular contact bearing 63, and a transmission connection structure is arranged between the output gear 40 and the transmission shaft of the plunger pump or the hydraulic pump. Specifically, the power take-off of this embodiment also includes The elastic body 61 , and the output gear 40 is provided with a first spline hole 41 coaxial with the output gear 40 . The outer surface of the elastic body 61 is provided with a first spline cooperating with the first spline hole 41, and the elastic body 61 is also provided with a first spline coaxial with the transmission shaft of the plunger pump or hydraulic pump and coaxial with the elastic body 61. Two spline holes 62 , the first spline is inserted in the first spline hole 41 , and the output gear 40 , the first spline hole 41 and the second spline hole 62 are coaxially arranged with each other.

The transmission shaft of the plunger pump or hydraulic pump needs to be provided with a second spline that matches the second spline hole, between the first spline and the first spline hole 41 and between the second spline and the second spline hole 62 A transition fit or an interference fit can be used between them. In this way, the rigid connection between the output gear 40 and the drive shaft can be changed into a flexible connection, and the assembly is better, and the cushioning effect of the elastic body can reduce the high-frequency severe vibration generated by the spline and the spline hole. The impact of the moving elements and seals on the hydraulic pump, the output characteristics of the plunger pump or hydraulic pump are relatively stable, and the service life of the plunger pump or hydraulic pump can be extended by 3-5 years.

Preferably, in this embodiment, the first spline hole 41 and/or the second spline hole 62 have involute splines, and the use of involute splines helps to improve the stability and reliability of the connection structure .

In addition, as shown in Figures 1-3, the power take-off provided in this embodiment also has a self-lubricating system, which includes three structures: a low-position gear lubricating structure, a high-position gear lubricating structure, and a storage lubricating structure. Specifically, the bottom of the inner cavity of the housing 10 is provided with an oil tank (not shown) filled with lubricating oil, and the lower part of the driving gear 20 is immersed in the oil tank. When in use, the lubricating oil in the oil tank can be adsorbed on the drive The teeth of the gear 20 are brought to the upper end of the driving gear 20 with the rotation of the driving gear 20, and then flow down under the action of gravity to lubricate the driving gear 20 and the corresponding bearings. The above structure is the low position Gear lubrication structure.

The side wall of the inner cavity of the housing 10 is provided with an oil supply device at a position corresponding to the meshing point between the output gear 40 and the transition gear 30 , of course, the oil supply device can also be located at a position corresponding to the lower part of the output gear 40 location. In this embodiment, the oil supply device is an oil injection nozzle 71 , that is, the oil injection nozzle 71 is arranged at a position corresponding to the meshing point between the output gear 40 and the transition gear 20 on the housing 10 . The fuel injection nozzle 71 is connected to the oil supply pipe outside the power take-off, and its injection direction is towards the meshing point between the output gear 40 and the transition gear 20. Of course, the specific injection angle needs to be set according to the actual type of the injection nozzle 71 , such as an oil nozzle that sprays lubricating oil in a parabola, at this time, it should be ensured that the end point of the parabola is located at the meshing point between the output gear 40 and the transition gear 20, preferably on the upward tooth surface of the corresponding teeth of the transition gear 20 superior. Simultaneously, the rotation direction of output gear 40 is from the lower end point of output gear 40 to the upper end point direction of output gear 40 through the meshing point between output gear 40 and transition gear 30, for example, when output gear 40 is positioned at the right side of transition gear 30 When the side is upward, the rotation direction of the output gear 40 should be counterclockwise, otherwise, the rotation direction of the output gear 40 should be clockwise. During use, the lubricating oil ejected from the oil nozzle 71 will be adsorbed on the teeth of the output gear 40, and will be driven by the upper end of the output ring gear 40 with the rotation of the output gear 40, and then flow downward under the action of gravity, The output gear 40 and the corresponding bearing are lubricated, and the above-mentioned structure is the lubrication structure of the high-position gear.

It should be noted that the lubricating structure of the above-mentioned high-position gear can be used not only in power take-offs, but also in other types of gearboxes, as long as the gearbox includes the second gear and the first gear that are meshed in sequence, and the second gear A gear is located above the side of the second gear. Specifically, the oil supply device is arranged so that it is located at a position corresponding to the lower part of the first gear. Similarly, the oil supply device is preferably an oil nozzle, and the oil injection nozzle is arranged on the same side as the first gear. At the position corresponding to the meshing point between the first gear and the second gear, the injection direction of the oil nozzle is towards the meshing point between the first gear and the second gear, and the rotation direction of the first gear is from the first gear The lower end points toward the upper end point of the first gear through the meshing point between the first gear and the second gear.

There is also a groove on the casing 10, and an oil storage chamber 72 is formed between the groove and the bearing end cover 33. The oil storage chamber 72 is filled with lubricating oil and is located below the oil nozzle 71, so that the oil storage chamber 72 is convenient for receiving The lubricating oil dripped from the oil injection nozzle 71 or sprayed by the oil injection nozzle 71 reflects the dripping on the output gear 40 or the intermediate gear 30 . The oil storage chamber 72 is provided with a lubricating passage 73 communicating with the oil storage chamber 72 on the transition wheel shaft 31 . In this embodiment, the opening of the lubricating channel 73 toward one end of the bearing 32 is arranged upward and is located between the two bearings 32, and the lubricating oil level in the oil storage chamber 72 is higher than the horizontal position of the upper end point of the transition wheel shaft 31 . When in use, the lubricating oil in the oil storage chamber 72 will overflow from the lubricating channel 73 towards the opening at one end of the bearing 32 under hydraulic pressure, and lubricate the bearing 32, and the lubricating oil overflowing to the bearing 32 will also be released under the action of gravity. Flow down to the transition wheel shaft 31 to lubricate the transition wheel shaft 31, the above structure is the storage type lubrication structure.

Preferably, for the above-mentioned storage type lubrication structure, stop rings sleeved on the transition wheel shaft 31 can also be provided on the opposite sides of the two bearings 32, and the opening of the lubricating channel 73 towards the end of the bearing 32 is located between the two stop rings. Between, and an oil storage tank is formed between the two retaining rings. Certainly, the lubricating oil liquid level in the oil storage chamber 72 needs to be higher than the upper end point of the retaining ring, like this, the lubrication in the lubricating channel 73 may first fill the oil storage tank, and then overflow from the upper end of the oil storage tank to the bearing 32. The bearing 32 is lubricated, and the lubricating oil in the oil storage tank will also obtain a certain centrifugal force along with the rotation of the transition gear 30 to lubricate the transition gear 30 and the transition wheel shaft 31. This lubricating structure not only has a better lubricating effect, but also has A certain heat dissipation effect, that is, the heat generated by the gear rotation will be taken away with the flow of lubricating oil.

Embodiment two.

This embodiment provides a gear transmission connection structure, which is the same as the transmission connection structure provided between the output gear 40 and the transmission shaft of the plunger pump or hydraulic pump in Embodiment 1. Specifically, the structure includes gears and A transmission shaft connected with the gear transmission, and the gear is provided with a first spline hole coaxial with the gear.

The structure also includes an elastic body, the elastic body is provided with a first spline that matches the first spline hole, the elastic body is also provided with a second spline hole, and the transmission shaft is provided with a second spline hole that matches the second spline hole. The matched second splines, the first splines are inserted in the first spline hole, the second splines are inserted in the second spline hole, and after assembly, the gear, the elastic body and the transmission shaft are arranged coaxially with each other. Transition fit or interference fit is adopted between the first spline and the first spline hole and between the second spline and the second spline hole.

Preferably, in this embodiment, the first spline and/or the second spline are involute splines.

The transmission connection structure provided by this embodiment can change the rigid connection between the gear and the transmission shaft into a flexible connection, and the assembly is better, and the cushioning effect of the elastic body can reduce the high-frequency severe vibration generated by the spline and the spline hole , the output characteristics are relatively stable, and the elastic body is inserted into the gear through the first spline arranged on the elastic body, so the structure is relatively compact.

The utility model has been described in detail above in conjunction with the accompanying drawings, but the implementation of the present utility model is not limited to the above-mentioned embodiment, and those skilled in the art can make various modifications to the utility model according to the prior art, such as embodiment one The fuel injection nozzle 71 in is changed to other oil supply devices etc., and these all belong to the protection domain of the present utility model.

Claims (6)

1. a kind of lubrication system of high-order gear, including housing and the driving tooth for being arranged in the housing and engaging successively Wheel, transition gear and output gear, it is characterised in that also including fueller, the output gear is located at the transition gear Side top, the fueller be located at the position corresponding with the bottom of the output gear at.

2. the lubrication system of high position gear as claimed in claim 1, it is characterised in that the fueller is atomizer, institute State atomizer and position corresponding with the meshing point between the output gear and the transition gear on the housing is set Place, the injection direction of the atomizer is towards the meshing point between the output gear and the transition gear, the output gear The direction of rotation of wheel is the meshing point described in lower extreme point Jing from the output gear between output gear and the transition gear To the upper extreme point direction of the output gear.

3. the lubrication system of high position gear as claimed in claim 2, it is characterised in that the driving gear is located at the transition The side-lower of gear.

4. the lubrication system of high position gear as claimed in claim 3, it is characterised in that the driving gear and the output gear Wheel is respectively positioned at the both sides of the transition gear.

5. a kind of lubrication system of high-order gear, including the second gear and first gear that engage successively, it is characterised in that also wrap Fueller is included, the first gear is located at the side top of the second gear, and the fueller is located at and first tooth At the corresponding position in the bottom of wheel.

6. the lubrication system of high position gear as claimed in claim 5, it is characterised in that the fueller is atomizer, institute State atomizer to be arranged at the position corresponding with the meshing point between the first gear and the second gear, the oil spout The injection direction of mouth is towards the meshing point between the first gear and the second gear, the direction of rotation of the first gear It is the meshing point described in the lower extreme point Jing from the first gear between first gear and the second gear to first tooth The upper extreme point direction of wheel.