CN218000361U - Oil duct structure of loader speed reducer - Google Patents

Abstract

The utility model provides an oil duct structure of a loader speed reducer, which comprises a first oil duct for lubricating a rear bearing of a speed reducer input shaft, a second oil duct for lubricating a rear bearing of a speed reducer intermediate shaft and a third oil duct for lubricating a front bearing of the speed reducer input shaft; the second oil duct and the third oil duct intersect and communicate with the first oil duct respectively, the first oil duct communicates with the gear pump oil-out, and the lubricating oil that causes the gear pump simultaneously leads the second oil duct and the third oil duct. The utility model discloses merge the lubricated oil duct of middle oil duct and reduction gear input shaft bearing of prior art into an oil duct, promptly first oil duct, the utility model discloses well first oil duct both shunts as middle oil duct, as the oil duct of direct lubrication reduction gear input shaft bearing again, has the integrated effect of function, has reduced the quantity of oil duct, has reduced the processing cost, has reduced the quantity of bowl shape chock plug, has reduced the oil leak risk, has reduced oil pressure loss.

Description

Oil duct structure of loader speed reducer

Technical Field

The utility model relates to a reduction gear technical field, more specifically relates to an oil duct structure of loader reduction gear.

Background

The loader reduction gear adopts the gear pump to carry out active lubrication, mainly lubricates each bearing of reduction gear, simultaneously, can also provide a strand lubricating oil auxiliary lubrication to the inside bad bearing or the gear of splash lubrication of reduction gear. The active lubrication system mainly comprises a gear pump, an oil pipe and an oil duct designed in a shell structure. The gear pump sucks oil from an oil storage cavity at the bottom of the speed reducer through an oil suction pipe, and then conveys lubricating oil to each bearing and the gear through an oil duct and an oil injection pipe which are designed in the shell to lubricate the gear and the bearing. And oil after lubrication returns to the oil storage cavity to enter the next cycle.

The oil passage designed in the shell structure is formed by drilling in the machining process of the shell. During assembly, a bowl-shaped plug piece is arranged at the position of the port and is isolated from the external environment to form a relatively closed lubricating oil path. Therefore, the simpler the oil channel design is in the shell structure, the fewer the oil channels are, the smaller the pressure drop of the active lubricating oil is, the fewer the bowl-shaped plug pieces are mounted, and the smaller the risk of oil leakage at the positions where the bowl-shaped plug pieces are mounted is. How to design the oil passage simply is a problem that needs to be considered by a designer.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to design an oil duct structure of loader reduction gear, this structure is through simplifying the oil duct structure, and first oil duct both shunts as middle oil circuit, as the oil duct of direct lubrication reduction gear input shaft bearing again, has reduced the quantity of oil duct, has reduced the quantity of bowl shape plug piece, has reduced the oil leak risk, has reduced the oil pressure loss.

The above object of the present invention is achieved by the following technical solutions:

an oil duct structure of a loader speed reducer comprises a first oil duct for lubricating a rear bearing of a speed reducer input shaft, a second oil duct for lubricating a rear bearing of a speed reducer intermediate shaft and a third oil duct for lubricating a front bearing of the speed reducer input shaft; the second oil duct and the third oil duct are respectively intersected and communicated with the first oil duct, the first oil duct is communicated with the oil outlet of the gear pump, and meanwhile lubricating oil of the gear pump is led to the second oil duct and the third oil duct.

The utility model discloses shunt as middle oil circuit first oil duct, first oil duct draws forth lubricating oil from the gear pump oil-out, divides into three strands, and one strand of lubricating oil leads to reduction gear input shaft rear bearing through first oil duct; a lubricating oil is introduced into the second oil duct and is guided to the rear bearing of the intermediate shaft of the speed reducer; and one lubricating oil is introduced into the third oil duct and is guided to the front bearing of the input shaft of the speed reducer.

In the prior art, when oil from a gear pump is transmitted to a rear bearing of an input shaft of a speed reducer, a rear bearing of an intermediate shaft of the speed reducer and a front bearing of the input shaft of the speed reducer, a communicating channel is required to be respectively arranged. The first oil duct is used as an intermediate oil duct for shunting, and is also used as an oil duct for directly lubricating a rear bearing of the input shaft of the speed reducer to lubricate the bearing, so that the number of the oil ducts is reduced, the processing cost is reduced, the number of the bowl-shaped plug pieces is reduced, the oil leakage risk is reduced, and the oil pressure loss is reduced.

Further, lubricating oil led out from the gear pump by the first oil passage is led downwards to a rear bearing of the input shaft of the speed reducer; the second oil duct is intersected with the first oil duct, one end of the second oil duct is blocked or provided with a bowl-shaped plug piece, and the other end of the second oil duct guides the lubricating oil to a rear bearing of the intermediate shaft of the speed reducer; the third oil passage comprises an intersecting part and a drainage part, the intersecting part is intersected with the first oil passage, two ends of the intersecting part are blocked or provided with bowl-shaped plug pieces, and the drainage part is communicated with the intersecting part to guide lubricating oil to the front bearing of the input shaft of the speed reducer.

When the oil passage is machined on the speed reducer shell, the oil passage can only be linear, and when the oil passage needs to be reversed, the oil passage can only be intersected through another straight oil passage, such as the third oil passage.

It should be noted that the present invention refers to "blocked or provided with a bowl-shaped plug", which means that the position is not accessible after the assembly of the reducer housing. If the oil passage is in a solid structure, the oil passage is blocked and cannot be communicated at the position after the speed reducer shell is assembled. If this location is on the outer surface of the housing, a bowl-shaped plug is installed for sealing.

Further, the first oil passage is communicated with an oil outlet of the gear pump through a fourth oil passage; the first oil passage intersects the fourth oil passage; one end of the fourth oil duct is communicated with the oil outlet of the gear pump, and the other end of the fourth oil duct is blocked or provided with a bowl-shaped plug sheet.

Furthermore, the second oil passage, the fourth oil passage and the third oil passage are sequentially intersected on the first oil passage from top to bottom. The utility model discloses according to reduction gear input shaft rear bearing, reduction gear jackshaft rear bearing and reduction gear input shaft front bearing need lubricated position, set up on the basis that reduces runner quantity, simplified structure.

Furthermore, the axes of the intersecting parts of the second oil channel and the third oil channel are coplanar and parallel and are parallel to the joint surface of the reducer shell, so that the rotating times of workpieces during machining can be reduced, and the machining difficulty and the machining cost are reduced.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses merge the lubricated oil duct of middle oil duct and reduction gear input shaft rear bearing of prior art into an oil duct, promptly first oil duct, the utility model discloses well first oil duct both shunts as middle oil duct, as the oil duct of direct lubrication reduction gear input shaft rear bearing again, has the effect of function integration, has reduced the quantity of oil duct, has reduced the oil leak risk.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an oil passage structure of a gear pump and a speed reducer of a loader according to the present invention.

Fig. 2 is a partial view of the oil passage structure of the loader speed reducer of the present invention in the speed reducer case.

1-a first oil duct, 2-a second oil duct, 31-a third oil duct intersection part, 32-a third oil duct drainage part, 4-a fourth oil duct, 5-a gear pump, 6-a hole, 7-a reducer input shaft rear bearing, 8-a reducer intermediate shaft rear bearing, 9-a reducer input shaft front bearing and 10-an oil collecting tank.

Detailed Description

The embodiments of the invention will be described in detail hereinafter with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Example 1

The oil ducts designed in the shell structure are formed by drilling in the shell machining process, and in the prior art, the rear bearing of the input shaft of the speed reducer, the rear bearing of the intermediate shaft of the speed reducer and the front bearing of the input shaft of the speed reducer are respectively provided with one oil duct; the three oil passages are respectively branched from a middle oil passage, and the middle oil passage is communicated with an oil outlet of the gear pump 5.

In the process that the oil duct of one lubricating part reaches the lubricating part, due to the interference of the internal structure of the shell, the oil duct does not necessarily reach the lubricating part directly from a straight line, holes are usually drilled in a plurality of places of the shell, and the lubricating oil is guided to the lubricating part by the straight line oil ducts which are intersected and communicated. A plurality of holes are drilled in the oil duct, and a bowl-shaped plug piece is required to be arranged at each drilled hole for sealing. The more bowl-shaped plug pieces are, the greater the risk of oil leakage is, and the greater the pressure drop of the active lubricating oil is. Therefore, when the oil passage is designed, the number of the oil passages is reduced, and the number of drilled holes, namely the number of the bowl-shaped plugging pieces can be reduced. This application is exactly through reducing oil duct quantity, has reduced the quantity of bowl shape cock piece, specifically integrates the design to the oil duct at three lubricated position, and these three lubricated position are: a reducer input shaft rear bearing 7, a reducer intermediate shaft rear bearing 8 and a reducer input shaft front bearing 9.

The oil duct structure of the loader speed reducer comprises a first oil duct 1 for lubricating a rear bearing 7 of a speed reducer input shaft, a second oil duct 2 for lubricating a rear bearing 8 of a speed reducer intermediate shaft and a third oil duct for lubricating a front bearing 9 of the speed reducer input shaft; the second oil duct 2 and the third oil duct are respectively intersected and communicated with the first oil duct 1, the first oil duct 1 is communicated with an oil outlet of the gear pump 5, and meanwhile lubricating oil of the gear pump 5 is led to the second oil duct 2 and the third oil duct.

As shown in fig. 1, the first oil passage 1 leads lubricating oil led from the gear pump 5 downward toward the reducer input shaft rear bearing 7; the second oil duct 2 is intersected with the first oil duct 1, one end of the second oil duct 2 is blocked or provided with a bowl-shaped plug piece, and the other end guides lubricating oil to a rear bearing 8 of a middle shaft of the speed reducer; the third oil channel comprises an intersecting part 31 and a drainage part 32, the intersecting part 31 is intersected with the first oil channel 1, two ends of the intersecting part 31 are blocked or provided with bowl-shaped plug pieces, and the drainage part 32 is communicated with the intersecting part 31 to guide lubricating oil to the front bearing 9 of the input shaft of the speed reducer.

In the present embodiment, as shown in fig. 1, the positions of the reducer input shaft rear bearing 7, the reducer intermediate shaft rear bearing 8, and the reducer input shaft front bearing 9 are: the front bearing 9 of the input shaft of the speed reducer is arranged below the rear bearing 7 of the input shaft of the speed reducer, and the rear bearing 8 of the intermediate shaft of the speed reducer is arranged on the upward left side of the rear bearing 7 of the input shaft of the speed reducer. As shown in fig. 2, the front bearing 9 of the input shaft of the speed reducer is not drawn, the third oil duct is located on the right side of the first oil duct, a drainage part of the third oil duct leads into an oil collection cavity, and actually, the oil collection cavity is communicated with an oil duct for introducing lubricating oil into a bearing hole of the front bearing 9 of the input shaft of the speed reducer. In fig. 2, the number 6 is the oil passage drilling position, and a bowl-shaped plug is added at the hole 6.

The first oil channel 1 is communicated with an oil outlet of the gear pump 5 through a fourth oil channel 4; the first oil passage 1 intersects the fourth oil passage 4; one end of the fourth oil duct 4 is communicated with an oil outlet of the gear pump 5, and the other end of the fourth oil duct is blocked or provided with a bowl-shaped plug sheet.

As shown in fig. 1, the first oil passage 1 is intersected with a second oil passage 2, a fourth oil passage 4, and a third oil passage in this order from top to bottom.

The axes of the intersecting portions 31 of the second oil passage 2 and the third oil passage are coplanar and parallel with the joint surface of the reducer case. Therefore, the rotation frequency of the workpiece during processing can be reduced, and the processing difficulty and the processing cost are reduced.

The lubricating oil duct of the middle oil duct and the rear bearing 7 of the input shaft of the speed reducer in the prior art is combined into one oil duct, namely, the first oil duct 1 is divided as the middle oil duct in the embodiment, and is used as the oil duct for directly lubricating the rear bearing 7 of the input shaft of the speed reducer, so that the oil duct has the function of integrating functions, the number of the oil ducts is reduced, the processing cost is reduced, the number of the bowl-shaped plug pieces is reduced, the oil leakage risk is reduced, and the oil pressure loss is reduced. The first oil passage 1 serves as an intermediate oil passage for guiding the lubricating oil led out from the gear pump 5 to three different lubricating portions. The axes of the intersecting parts 31 of the second oil channel 2 and the third oil channel are coplanar and parallel and are parallel to the joint surface of the reducer shell, so that the rotation times of workpieces during machining are reduced and the machining difficulty and the machining cost are reduced by combining with the actual working condition.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. An oil duct structure of a loader speed reducer comprises a first oil duct used for lubricating a rear bearing of an input shaft of the speed reducer, a second oil duct used for lubricating a rear bearing of an intermediate shaft of the speed reducer and a third oil duct used for lubricating a front bearing of the input shaft of the speed reducer; the gear pump is characterized in that the second oil duct and the third oil duct are intersected and communicated with the first oil duct respectively, the first oil duct is communicated with an oil outlet of the gear pump, and lubricating oil of the gear pump is led to the second oil duct and the third oil duct simultaneously.

2. The oil passage structure of a loader speed reducer according to claim 1, wherein the first oil passage leads lubricating oil led from the gear pump downward toward a speed reducer input shaft rear bearing; the second oil duct is intersected with the first oil duct, one end of the second oil duct is blocked or provided with a bowl-shaped plug piece, and the other end of the second oil duct guides the lubricating oil to a rear bearing of the intermediate shaft of the speed reducer; the third oil passage comprises an intersecting part and a drainage part, the intersecting part is intersected with the first oil passage, two ends of the intersecting part are blocked or provided with bowl-shaped plug pieces, and the drainage part is communicated with the intersecting part to guide lubricating oil to the front bearing of the input shaft of the speed reducer.

3. The oil passage structure of the loader speed reducer according to claim 2, wherein the first oil passage communicates with the gear pump oil outlet through a fourth oil passage; the first oil passage intersects the fourth oil passage; one end of the fourth oil duct is communicated with the oil outlet of the gear pump, and the other end of the fourth oil duct is blocked or provided with a bowl-shaped plug sheet.

4. The oil passage structure of the loader reducer according to claim 3, wherein the first oil passage is intersected with the second oil passage, the fourth oil passage and the third oil passage from top to bottom in sequence.

5. The oil passage structure of the reducer of the loader according to claim 2, wherein the axes of the intersecting portions of the second oil passage and the third oil passage are coplanar and parallel to the reducer case joint surface.

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