WO2013181906A1

WO2013181906A1 - Transfer case and engineering machinery

Info

Publication number: WO2013181906A1
Application number: PCT/CN2012/086020
Authority: WO
Inventors: 梁颂斌; 汤志武; 况柏文
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2012-06-08
Filing date: 2012-12-06
Publication date: 2013-12-12
Also published as: CN202646648U

Abstract

Disclosed are a transfer case and engineering machinery. The transfer case comprises: a box body (1), a gear wheel shaft (2) and a bearing (3), wherein internal splines (21) are provided on an inner wall of a shaft hole of the gear wheel shaft (2), and an oil guide hole (11) is provided on the box body (1). The transfer case also comprises: an oil guide groove (12) and an oil receiving part (4), wherein the oil guide groove (12) is provided in the box body (1), an oil inlet end of the oil guide groove (12) is in communication with the oil guide hole (11), and an oil outlet end is in communication with the oil receiving part (4). One end of the oil receiving part (4) is connected with the box body (1) and is in communication with the oil outlet end of the oil guide groove (12) and the other end extends into the shaft hole of the gear wheel shaft (2). The oil receiving part (4) is used to guide lubricating oil from the oil outlet end of the oil guide groove (12) into the shaft hole. Lubricating oil in the transfer case circulates successively in order between the oil guide hole (11), the oil guide groove (12), the oil receiving part (4), the engagement end and the non-engagement end of the internal splines (21) of the shaft hole, the bearing, and the oil guide hole (11), and in the process of circulating, the lubricating oil continuously flows through the engagement end of the internal splines (21), thereby lubricating and cooling the internal splines (21). Hence, the transfer case has good lubricating effects on the splines, thus the service life of the splines is longer and the reliability of the transfer case is greater.

Description

Transfer case and engineering This application claims the priority of the Chinese patent application filed on June 8, 2012 by the Chinese Patent Office, application number 201220271797.5, and the invention titled "Transfer Box and Construction Machinery", the entire contents of which are incorporated by reference. In this application. Technical field

The utility model relates to the field of engineering machinery, in particular to a transfer case and an engineering machine. Background technique

The transfer case is a key component of the construction machine, which is used to distribute the power of the engine, thereby providing a suitable driving force for the construction machine and improving the handling performance. If the sub-driver fails, it will cause the whole machine to be inoperable.

The gear shaft of the transfer case is fixed in the case through the bearing, and is connected with the pump through the spline. If the spline cannot be lubricated and cooled by the lubricating oil, the service life thereof will be seriously shortened, thereby affecting the reliability of the transfer case. .

The existing transfer case is provided with an oil guiding hole on the box body, and the gear oil flows through the oil guiding hole along the oil guiding rib plate on the box body, and enters the bearing end surface under the action of its own gravity. Most of the lubricating oil flowing into the transfer case is used to lubricate the bearing, and the amount of oil that lubricates the spline into the shaft hole is small, so the existing transfer case does not have a good lubrication effect on the spline in the gear shaft. Summary of the invention

In view of this, the utility model provides a transfer case and an engineering machine to solve the problem that the existing transfer case has poor lubrication effect on the gear shaft spline.

In one aspect, the utility model provides a transfer case, comprising: a box body, a gear shaft and a bearing; an inner wall of the shaft hole of the gear shaft is provided with an internal spline, and the box body is provided with an oil guiding hole; The transfer case further includes: an oil guiding groove and an oil receiving portion;

The oil guiding groove is disposed in the tank body, the oil inlet end of the oil guiding groove is in communication with the oil guiding hole, and the oil discharging end is in communication with the oil receiving portion;

One end of the oil connecting portion is connected to the tank body and communicates with the oil discharge end of the oil guiding groove, and the other end extends into the shaft hole of the gear shaft, and the oil connecting portion is used for oil discharging of the oil guiding groove The lubricating oil flowing out at the end is introduced into the shaft hole.

Further, the transfer case further includes: a slinger, the oil slinger is disposed on an inner wall of the shaft hole, and is located at a non-engaged end of the inner spline, and the non-engaged end is The opposite end of the engaging end of the inner spline.

Further, the inner diameter of the oil retaining ring is smaller than the large diameter of the inner spline.

Further, the transfer case further includes: a limiting ring disposed on the shaft hole for limiting the oil slinger.

Further, the outer diameter of the limiting ring is larger than the diameter of the shaft hole, and the shaft hole is provided with an annular groove adapted to the outer circle of the limiting ring.

Further, the oil receiving portion is detachably connected to the box by a fastener.

Further, the oil receiving portion is a semicircular pipe, and the semicircular pipe is located below the oil discharge end of the oil guiding groove.

Further, the oil receiving portion is a round pipe, and the round pipe is connected to an oil discharge end of the oil guiding groove.

Further, an arrangement angle between the arrangement direction of the oil receiving portion and the axis of the shaft hole is provided. In another aspect, the present invention provides a construction machine provided with any of the above transfer boxes.

Now, for the existing transfer case, the transfer case of the transfer case of the present invention is provided with an oil guiding groove communicating with the oil guiding hole, and an oil connecting portion communicating with the oil guiding groove, and one end of the oil receiving portion is extended Into the shaft hole. Thereby, the lubricating oil will be sequentially engaged along the oil guiding hole, the oil guiding groove, the oil receiving portion, and the spline in the shaft hole. The end and non-engagement ends, the bearing and the oil guiding hole are sequentially circulated, and the lubricating oil continuously flows through the engaging end of the internal spline during the circulation, thereby achieving lubrication and cooling of the internal spline. Therefore, the transfer case has a better lubrication effect on the spline, the service life of the spline is longer, and the reliability of the transfer case is higher.

The construction machine provided by the utility model is provided with the above-mentioned transfer case. Since the above transfer case has the above technical effects, the construction machine should also have corresponding technical effects. DRAWINGS

1 is a schematic structural view of a transfer case provided by Embodiment 1 of the present invention;

2 is a schematic structural view of a transfer case provided by Embodiment 2 of the present invention;

Figure 3 is a schematic view of the position of the oil retaining ring and the shaft hole;

Figure 4 is a schematic structural view of a transfer case provided in Embodiment 3 of the present invention;

Figure 5 is a schematic view showing the structure of a transfer case provided in Embodiment 4 of the present invention.

Description of the reference signs:

1 case 11 oil guide hole

12 oil guide groove 2 gear shaft

21 internal spline 3 bearing

4 oil connection 41 screw

5 Oil slinger 6 Limiting ring BEST MODE FOR CARRYING OUT THE INVENTION It should be noted that the embodiments of the present invention and the features of the embodiments can be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

Figure 1 shows the structure of the transfer case of the embodiment 1 of the present invention, the transfer case includes: a case 1, a gear shaft 2, a shaft 73 and an oil receiving portion 4; An oil guiding hole 11 is disposed on the casing 1, and an inner wall of the shaft hole of the gear shaft 2 is provided with an internal spline 21; wherein:

An oil guiding groove 12 is further disposed in the tank body 1. The oil inlet end of the oil guiding groove 12 communicates with the oil guiding hole 11; the oil connecting portion 4 is specifically a semicircular pipe, and one end thereof is connected to the casing 1 through the screw 41 and is located at the oil guiding groove 12 a lower portion of the oil end, whereby the oil receiving portion 4 communicates with the oil discharge end of the oil guiding groove 12 for receiving lubricating oil flowing out from the oil discharging end of the oil guiding groove 12; the other end of the oil receiving portion 4 extends into the shaft hole; The portion 4 is configured to introduce the lubricating oil flowing out of the oil discharge end of the oil guiding groove 12 into the shaft hole;

The direction of the arrow in Figure 1 is the direction of the lubricant, specifically:

The lubricating oil enters the oil guiding hole 11 along the oil guiding rib plate of the casing 1;

The lubricating oil enters the oil guiding groove 12 through the oil guiding hole 11;

The lubricating oil flows out of the oil guiding groove 12 and falls into the oil receiving portion 4;

The lubricating oil flows into the shaft hole along the oil connecting portion 4;

The gear shaft 2 is in a state of high-speed rotation, and the lubricating oil flowing out from the oil-receiving portion 4 adheres to the inner wall of the lower portion of the shaft hole and flows toward the engaging end and the non-engaging end of the inner spline 21, and the lubricating oil flowing toward the engaging end of the inner spline 21 Enter the joint of the spline to lubricate the spline;

The lubricating oil flows through the engaging end and the non-engaging end of the internal spline 21, and then flows out from both ends of the shaft hole to lubricate the bearing;

The gear shaft 3 that rotates at a high speed performs the above cycle after the lubricating oil is thrown into the oil guiding rib.

In the present invention, the engaging end of the internal spline 21 refers to the end of the internal spline of the gear shaft that engages with the spline of the pump, and the non-engaged end refers to the end opposite the engaging end.

In the above embodiment, the oil guiding groove 12 functions to conduct the flow of the lubricating oil flowing from the oil guiding hole 11, and the oil discharge end of the oil guiding groove 12 communicates with the shaft hole of the bearing 3. However, there is a gap between the oil guiding groove 12 and the gear shaft 2, so that the lubricating oil flowing out from the oil discharging end of the oil guiding groove 12 cannot directly flow into the shaft hole, and the oil receiving portion 4 functions to: discharge the oil guiding groove 12 The lubricating oil flowing out from the oil end is introduced into the shaft hole, and one end thereof is connected to the casing 1 and located at the lower end of the oil guiding groove 12, that is, one end of the oil receiving portion 4. The oil is connected to the oil discharge end of the oil guiding groove 12, and is used for receiving the lubricating oil flowing out from the oil discharge end of the oil guiding groove 12; the other end thereof extends into the shaft hole for introducing the lubricating oil in the oil receiving portion 4 into the shaft hole. . The lubricating oil flowing into the inside of the shaft hole flows through the engaging end of the internal spline 21, thereby achieving lubrication and cooling of the internal spline 21.

The housing of the transfer case provided in this embodiment is provided with an oil guiding groove communicating with the oil guiding hole, and an oil connecting portion communicating with the oil guiding groove, and one end of the oil receiving portion extends into the shaft hole. Therefore, the lubricating oil will sequentially circulate along the oil guiding hole, the oil guiding groove, the oil receiving portion, the spline engaging end and the non-engaging end of the shaft hole, the bearing and the oil guiding hole, and the lubricating oil will continuously continue during the cycle. It flows through the engagement end of the internal spline, thereby achieving lubrication and cooling of the internal spline. Therefore, the transfer case has a good lubrication effect on the spline.

2 shows the structure of the transfer case of Embodiment 2 of the present invention. The transfer case is different from Embodiment 1 in that it is further provided with an oil retaining ring 5 which is disposed on the inner wall of the shaft hole, and Located at the non-engaged end of the inner spline 21.

The additional oil slinger 5 is used to: retain the lubricating oil flowing into the non-engaging end of the inner spline 21 in the shaft hole, so that more lubricating oil flows to the meshing end of the inner spline 21, thereby improving the lubrication of the inner spline 21 effect.

In order to further increase the flow rate of the lubricating oil at the meshing end of the internal spline 21, the transfer case is preferably further provided with a larger diameter d _{0 of the} inner ring of the slinger 5 than the inner spline 21 (Fig. 3).

Figure 4 shows the structure of the transfer case of Embodiment 3 of the present invention, and the transfer case differs from Embodiment 1 in that:

A limiting ring 6 is further disposed in the shaft hole, and the outer diameter of the limiting ring 6 is larger than the diameter of the shaft hole, and the annular hole is matched with the outer circle of the limiting ring 6; the limiting ring 6 is provided In the annular groove of the shaft hole, one end of the limiting ring 6 is in contact with the oil retaining ring 5, and the limiting ring 6 is used for limiting the oil retaining ring 5;

The function of the additional limit ring 6 is to limit the oil retaining ring 5, and the position of the oil retaining ring 5 is prevented from shifting in the case of vibration or swing of the transfer case, so that the oil retaining ring 5 is in various working rings. The environment can exert a better oil intercepting effect and improve the stability of the lubricating oil flow at the meshing of the internal spline 21. Figure 5 shows the structure of the transfer case of Embodiment 4 of the present invention, and the transfer case differs from Embodiment 3 in that:

The arrangement direction of the oil receiving portion 4 (L _{2 in} Fig. 5) and the axis of the shaft hole (the angle α is provided between the directions in Fig. 5).

In the transfer case provided by the embodiment, the arrangement direction of the oil receiving portion 4 is inclined to a certain angle toward the bottom of the shaft hole, so that the lubricating oil in the oil receiving portion 4 quickly flows into the shaft hole under the action of gravity, on the one hand, The amount of residual oil in the oil receiving portion 4 is reduced to improve the utilization rate of the lubricating oil; on the other hand, the circulation speed of the lubricating oil is increased.

It should be noted that, in the above embodiment, the oil receiving portion is a semi-circular pipe structure, and it may also adopt a round pipe structure, and the round pipe is connected to the oil discharge end of the oil guiding groove. Similarly, the oil port can also adopt other structures with oil-bearing space, such as V-tubes, square tubes, and the like.

It should be noted that the oil receiving portion in the above embodiment is detachably connected to the casing by screws, and the connection mode has an advantage in that it is convenient to adjust the position of the oil receiving portion. Those skilled in the art will appreciate that the oil port can also be coupled to the housing using other fasteners well known to those skilled in the art. Alternatively, the oil connection can be welded, bonded or riveted to the tank.

The utility model also provides a construction machine, which is provided with the above-mentioned transfer case. Since the above-mentioned transfer case has the above technical effects, the construction machine provided with the transfer case should also have corresponding technical effects, and the specific implementation process is similar to the above embodiment, and will not be described again.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and principles of the present invention, should be included in Within the scope of protection of the present invention.

Industrial applicability

The box body of the transfer case provided by the utility model is provided with an oil guiding groove communicating with the oil guiding hole, and an oil connecting portion communicating with the oil guiding groove, and one end of the oil receiving portion extends into the shaft hole. Thus, lubricating oil It will sequentially circulate along the oil guiding hole, the oil guiding groove, the oil receiving portion, the spline engaging end and the non-engaging end of the shaft hole, the bearing and the oil guiding hole, and the lubricating oil will continuously flow through the internal spline during the circulation. The engagement end, thereby achieving lubrication and cooling of the internal splines. Therefore, the transfer case has a better lubrication effect on the spline, the service life of the spline is longer, and the reliability of the transfer case is higher. The construction machine provided by the utility model is provided with the above-mentioned transfer case. Since the above transfer case has the above technical effects, the construction machine should also have corresponding technical effects. Therefore, the utility model has industrial applicability.

Claims

Claim

A transfer case comprising: a case (1), a gear shaft (2) and a bearing (3); the inner wall of the shaft hole of the gear shaft (2) is provided with an internal spline (21), the box An oil guiding hole (11) is disposed on the body (1), wherein

The transfer case further includes: an oil guiding groove (12) and an oil receiving portion (4);

The oil guiding groove (12) is disposed in the casing (1), the oil inlet end of the oil guiding groove (12) is in communication with the oil guiding hole (11), and the oil discharging end and the oil receiving portion (4) Interconnected

One end of the oil receiving portion (4) is connected to the tank body (1) and communicates with the oil discharge end of the oil guiding groove, and the other end extends into the shaft hole of the gear shaft, and the oil receiving portion (4) The lubricating oil for discharging the oil discharge end of the oil guiding groove (12) is introduced into the shaft hole.

2. The transfer case according to claim 1, wherein the transfer case further comprises: a slinger (5), the slinger (5) is disposed on an inner wall of the shaft hole, and Located in the inner spline

At the non-engaged end of (21), the non-engaged end is an end opposite to the engaging end of the inner spline (21).

The transfer case according to claim 2, characterized in that the inner diameter of the oil retaining ring (5) is smaller than the large diameter of the inner spline (21).

The transfer case according to claim 2, wherein the transfer case further comprises: a limit ring disposed on the shaft hole for limiting the oil retaining ring (5) ( 6).

The transfer case according to claim 4, wherein a diameter of an outer circle of the limiting ring (6) is larger than a diameter of the shaft hole, and the shaft hole is provided with the limiting ring (6) The outer ring is fitted with an annular groove.

The transfer case according to claim 1, characterized in that the oil receiving portion (4) is detachably connected to the case (1) by a fastener.

7. The transfer case according to claim 1, wherein the oil receiving portion (4) is a semicircular pipe, and the semicircular pipe is located below the oil discharge end of the oil guiding groove (12). The transfer case according to claim 1, wherein the oil receiving portion (4) is a round pipe, and the round pipe is connected to an oil discharge end of the oil guiding groove (12).

9. The transfer case according to claim 1, wherein an angle between an arrangement direction of the oil receiving portion (4) and an axis of the shaft hole is provided.

10. A construction machine, characterized in that it is provided with a transfer case according to any one of claims 1 to 9.