WO2013023370A1 - Lubricating structure for inter-axle differential of drive-through axle and vehicle - Google Patents

Abstract

Disclosed are a lubricating structure for an inter-axle differential of a drive-through axle, and a vehicle with the lubricating structure, wherein the lubricating structure comprises a first housing, a second housing, a final drive housing and an inter-axle differential, the second housing being provided between the first housing and the final drive housing, and forming a first cavity and a second cavity, respectively, with the first housing and the final drive housing, the inter-axle differential being located in the first cavity; wherein the first cavity and the second cavity communicate with each other through a communication pipe, the location of the communication pipe where it communicates with the first cavity being lower than the location of the communication pipe where it communicates with the second cavity. When a lubricant oil in the first cavity flows through the fitting clearance between the inter-axle differential, the tandem axles and a driving gear and the bearing clearance into the second cavity leading to lubricant oil loss in the first cavity, the lubricant oil in the second cavity can flow into the first cavity through the communication pipe to compensate for the loss and to ensure that the inter-axle differential is lubricated.

Description

 Inter-axle differential lubrication structure and vehicle for through-drive axle

 Technical field

 The present invention relates to lubrication of an inter-axle differential of a through-drive axle, and more particularly to an inter-axle differential lubrication structure of a transaxle and a vehicle having the same. Background technique

 As shown in FIG. 1, the inter-axle differential 4 of the through-drive axle is typically mounted in a first chamber A formed by a first housing 1 and a second housing 2 (generally referred to collectively as a bridge housing). The second housing 2 and the final drive housing 3 form a second chamber B. The through shaft 5 passes through the first chamber A and the second chamber B, and the inter-axle differential 4 is mounted on the through shaft 5 and located in the first chamber A. The driving gear 6 is mounted on the through shaft 5, and the driving gear 6 and the driven gear 7 are engaged and disposed in the second chamber B. Lubricating oil may be applied to the first chamber A through the fuel filler port 13 provided in the first casing 1 to lubricate the inter-axle differential 4. When the inter-axle differential 4 is in operation, the lubricating oil can be splashed to lubricate the bearing 10 provided at the end of the first casing.

 Since the inter-axle differential 4, the through shaft 5, and the drive gear 6 have an assembly gap therebetween, the first chamber A and the second chamber B communicate through the assembly gap. Lubricating oil in the first chamber A may flow into the second chamber B through the fitting gap to cause loss of lubricating oil. To this end, an oil passage and a pump (for example, a gear pump 7b mounted on the second housing 2 and driven by the gear shaft 7a) are provided between the first chamber A and the second chamber B for use from the second The chamber B replenishes the first chamber A with lubricating oil.

However, the arrangement of the oil passages and the pump causes the arrangement of the inter-axle differential 4 to be adjusted accordingly, making the structure complicated. In addition, if the pump fails and the first chamber A cannot be replenished with oil, the inter-axle differential 4 cannot be well lubricated due to insufficient lubricating oil in the first chamber A, and the bearing 10 cannot be lubricated. Causes serious consequences such as burning parts. Summary of the invention

 The problem to be solved by the present invention is the lubrication of the inter-axle differential between the through-drive axles.

 In order to achieve the above object, the present invention provides an inter-axle differential lubrication structure for a through-drive axle, the lubrication structure including a first housing, a second housing, a final drive housing, and an inter-axle differential, a second housing is disposed between the first housing and the final drive housing, and forms a first chamber and a second chamber with the first housing and the final drive housing, respectively The inter-axle differential is located in the first chamber, wherein the first chamber and the second chamber are communicated by a communication tube, and the position of the communication tube communicating with the first chamber is higher than The position at which the communication tube communicates with the second chamber is low.

 Preferably, the lower portion of the first chamber and the lower portion of the second chamber are sealed by a first oil seal.

 Preferably, the intermeshing driving gear and the driven gear are disposed in the second chamber, and the first oil seal is disposed on the shoulder of the driven gear.

 Preferably, a side of the first housing that is away from the second chamber is provided with a first through hole, and a side of the second housing that is adjacent to the first chamber is provided with a second through hole, the communication Both ends of the tube are inserted into the first through hole and the second through hole, respectively.

 Preferably, an end of the first housing remote from the second chamber is provided with a bearing and a bearing cover, and the bearing and the first housing and the bearing cover are disposed between a communication space in which the first through holes communicate.

 Preferably, the end of the bearing cap is provided with a second oil seal.

 Preferably, the first housing is provided with a fueling port.

 The present invention also provides a vehicle, wherein the vehicle includes an inter-axle differential lubrication structure of the through-type transaxle of the present invention.

According to the above technical solution, when the lubricating oil in the first chamber flows into the second chamber through the assembly gap between the inter-axle differential, the through shaft and the driving gear, causing the lubricating oil of the first chamber to be lost, the second The lubricating oil in the chamber can flow into the first chamber through the communication tube to compensate for the above loss. Make sure that the interaxle differential is lubricated.

 Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

 The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of an inter-axle differential lubrication structure of a prior art through-drive axle;

 Fig. 2 is a schematic view showing the structure of the inter-axle differential lubrication structure of the through-type transaxle of the present invention. Description of the reference numerals

 1: first housing la: first through hole lb: first gap

 2: second housing 2a: second through hole

 3: Main reducer housing 4: Inter-axle differential 5: Through shaft 6: Drive gear

7: Drive gear 7a: Gear shaft 7b: Gear pump

 8: Connecting pipe 9: First oil seal 10: Bearing

 11: Bearing cap 11a: Second gap 12: Second oil seal 13 : Filling port

A: first chamber B: second chamber

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In the present invention, the orientation words such as "up, down, left, and right" as used herein generally refer to the upper, lower, left, and right as shown in the accompanying drawings; "inside and outside". It refers to the inside and outside of the outline of each component itself.

 According to an aspect of the invention, there is provided an inter-axle differential lubrication structure for a through-drive axle, the lubrication structure comprising a first housing 1, a second housing 2, a final drive housing 3 and an inter-axle differential 4. The second housing 2 is disposed between the first housing 1 and the final drive housing 3, and forms a first with the first housing 1 and the final drive housing 3, respectively. a chamber A and a second chamber B, the inter-axle differential 4 is located in the first chamber A, wherein the first chamber A and the second chamber B pass through a communication tube 8 is connected, and the position where the communication pipe 8 communicates with the first chamber A is lower than the position where the communication pipe 8 communicates with the second chamber B.

 During the operation of the inter-axle differential 4, the lubricating oil in the first chamber A is caused to flow from the first chamber A to the second chamber B through the assembly gap, thereby causing the lubricating oil loss of the first chamber A. At this time, the lubricating oil in the second chamber B (for lubricating the driving gear 6 and the driven gear 7) can flow into the first chamber A through the communication pipe 8 to compensate for the above loss, and ensure that the inter-axle differential can be lubricated.

 It should be understood that, in addition to the assembly gap, the first chamber A and the second chamber B can only communicate through the connecting tube 8 and cannot be otherwise connected. To this end, preferably, the lower portion of the first chamber A and the lower portion of the second chamber B are sealed by the first oil seal 9.

 Further, the first oil seal 9 can be mounted in an appropriate manner as long as the gap between the first chamber A and the second chamber B other than the assembly gap and the communication tube 8 can be avoided. Preferably, as shown in Fig. 2, the intermeshing driving gear 6 and the driven gear 7 are disposed in the second chamber, and the first oil seal 9 is disposed on the shoulder of the driven gear 7. Wherein, the inter-axle differential 4 and the driving gear 6 are respectively mounted on the through shaft 5, and the operation of the driving gear 6 and the driven gear 7 will agitate the lubricating oil in the second chamber B and make the second chamber B The lubricating oil can flow into the first chamber A through the communication pipe 8 to maintain the lubricating oil in the first chamber A at a desired liquid level.

Among them, the communication tube 8 can be made of various suitable materials. Preferably, the communication tube 8 may be made of a rigid material, such as a steel tube or other metal or alloy tube, so that For a rigid, sealed connection. Further, as shown in FIG. 2, the communication pipe 8 may be formed to have an inclined portion such that the position where the communication pipe 8 communicates with the first chamber A is lower than the position where the communication pipe 8 communicates with the second chamber B.

 Further, the communication tube 8 may be disposed at any appropriate position as long as the first chamber A and the second chamber B can be communicated. Preferably, a side of the first casing 1 away from the second chamber B is provided with a first through hole la, and a side of the second casing 2 close to the first chamber A is provided with a second pass The hole 2a has two ends of the communication tube 8 inserted into the first through hole 1a and the second through hole 2a, respectively.

 More preferably, the end of the first housing 1 remote from the second chamber B is provided with a bearing 10 and a bearing cover 11 at the bearing 10 and the first housing 1 and the bearing cap A communication space communicating with the first through hole la is provided between the 11 holes. Therefore, by providing the communication space, the lubricating oil flowing from the second chamber B through the communication pipe 8 into the first chamber A can be supplied not only to the inter-axle differential 4 but also to the bearing 10 through the communication space. In other words, a portion of the lubricating oil flowing into the first chamber A through the communication pipe 8 is used to lubricate the inter-axle differential 4, and the other portion can flow into the communication space and lubricate the bearing 10.

 Specifically, as shown in FIG. 2, at a position adjacent to the first through hole la, a first gap lb is formed between the first housing 1 and the outer ring of the bearing 10, and is formed between the bearing 10 and the bearing cover 11. There is a second gap 11a communicating with the first gap lb (for example, the second gap 11a is formed between the end of the bearing 10 and the bearing cap 11 and between the outer ring of the bearing 10 and the bearing cap 11). The first gap lb and the second gap 11a together form a communication space, and the lubricating oil flowing into the first chamber A through the communication tube 8 may sequentially pass through the first gap lb and the second gap 11a, thereby passing through the outer ring and the end of the bearing 10. Flow to the inner ring to lubricate the rollers of the bearing 10.

 Preferably, the end of the bearing cap 11 may be provided with a second oil seal 12 to prevent leakage of lubricating oil from the first chamber A.

It is to be understood that the first oil seal 9 and the second oil seal 12 may have the same or different structures as long as they can function as a seal. Those skilled in the art can select oil seal parts of various suitable structures and materials as the first oil seal 9 and the second oil seal 12 according to design requirements, and do not elaborate here. Description.

 Further, a fuel filler port 13 may be provided in the first casing 1 to replace or add lubricating oil to the first chamber A as needed. The fuel filler port 13 can be disposed at any suitable position. In the preferred embodiment shown, since the pump and the like are omitted in the present invention, the fuel filler port 13 can be disposed at the lower portion of the first casing 1.

 According to another aspect of the present invention, a vehicle is provided, wherein the vehicle includes an inter-axle differential lubrication structure of the through-drive axle of the present invention. In use, the inter-axle differential lubrication structure of the through-drive axle of the present invention ensures that the inter-axle differential is well lubricated for smooth running of the vehicle.

 The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

 It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

 In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request 1. An inter-axle differential lubrication structure for a through-drive axle, the lubrication structure comprising a first housing (1), a second housing (2), a final drive housing (3) and an inter-axle differential (4) the second housing (2) is disposed between the first housing (1) and the final drive housing (3) and respectively with the first housing (1) and The final drive housing (3) forms a first chamber (A) and a second chamber (B), the inter-axle differential (4) being located in the first chamber (A), characterized The first chamber (A) and the second chamber (B) are connected by a communication tube (8), and the position of the communication tube (8) communicating with the first chamber (A) is higher than The position where the communication pipe (8) communicates with the second chamber (B) is low. 2. The inter-axle differential lubrication structure of a through-type transaxle according to claim 1, wherein a lower portion of said first chamber (A) and a lower portion of said second chamber (B) pass first Oil seal (9) sealed. The inter-axle differential lubrication structure of the through-type transaxle according to claim 2, wherein the intermeshing driving gear (6) and the driven gear (7) are disposed in the second chamber (B), The first oil seal (9) is disposed on a shoulder of the driven gear (7). The inter-axle differential lubrication structure of the through-type transaxle according to any one of claims 1 to 3, wherein the first casing (1) is away from the second chamber (B) a side of the second casing (2) is provided with a first through hole (1a), and a side of the second casing (2) adjacent to the first chamber (A) is provided with a second through hole (2a), the connecting pipe (8) Inserting the first through hole (1a) and the second through hole (2a) into the two ends respectively The inter-axle differential lubrication structure of the through-type transaxle according to claim 4, wherein An end of the first casing (1) remote from the second chamber (B) is provided with a bearing (10) and a bearing cap (11), and the bearing (10) and the first casing (1) A communication space communicating with the first through hole (1a) is provided between the bearing cap (11). The inter-axle differential lubrication structure of a through-type transaxle according to claim 5, wherein the end of the bearing cap (11) is provided with a second oil seal (12). The inter-axle differential lubrication structure of a through-type transaxle according to claim 1, wherein the first casing (1) is provided with a fuel filler opening (13). A vehicle, characterized in that the vehicle comprises an inter-axle differential lubrication structure of a through-type transaxle according to any one of claims 1-7.