WO2022242294A1

WO2022242294A1 - Driving gear structure of loader, main speed reducer of loader, and loader

Info

Publication number: WO2022242294A1
Application number: PCT/CN2022/082042
Authority: WO
Inventors: 王培林; 张振
Original assignee: 上海三一重机股份有限公司
Priority date: 2021-05-18
Filing date: 2022-03-21
Publication date: 2022-11-24
Also published as: CN215673456U

Abstract

A driving gear structure of a loader, a main speed reducer of a loader, and a loader. The driving gear structure of a loader comprises: a driving gear (8), the input end of the driving gear being connected to a flange (3); and multiple oil seals (5, 6), each oil seal being sleeved on the flange, and the multiple oil seals being stackedly connected along an axial direction of the flange. The described structure enables an oil seal disposed at an outer side to prevent external dust from entering the main speed reducer of a loader, thereby reducing the wear on the oil seal; meanwhile, an oil seal disposed at an inner side can prevent oil from leaking inside of the main speed reducer of the loader, thereby effectively increasing sealing performance, preventing oil leakage and significantly reducing the risk of oil spillage.

Description

Loader driving gear structure, loader final reducer and loader

Cross References to Related Applications

This application claims the priority of the Chinese patent application No. 202121071418.3 filed on May 18, 2021, entitled "A loader driving gear structure, loader main reducer and loader", which is incorporated by reference in its entirety Incorporated into this article.

technical field

The present application relates to the field of auto parts, in particular to a loader driving gear structure, a loader final reducer and a loader.

Background technique

At present, the input end of the main reducer after the loader is mostly sealed by three methods: sealant, seal ring, and single oil seal.

The way of applying the sealant is not conducive to the improvement of production efficiency because of the long application time, and it is not easy to repair, and the sealant is not resistant to high temperature and is greatly affected by the environment. When sealing with a sealing ring, because it is a dynamic seal, the sealing ring wears a lot, which is easy to cause oil leakage; when sealing with a single oil seal, because there is only one oil seal, once the oil seal is damaged, it will cause oil leakage, and the loader is mostly used in working environments such as mines and construction sites. In harsh places, there are many dust and impurities, and the dustproof ability of single oil seal is limited, which is easy to wear and cause leakage.

Contents of the invention

The embodiment of the present application provides a loader driving gear structure, a loader main reducer and a loader, which are used to solve the problems of limited sealing capacity of the input end of the existing loader main reducer, which easily causes oil leakage and the like.

An embodiment of the present application provides a loader driving gear structure, including:

a driving gear, the input end of the driving gear is connected with a flange;

A plurality of oil seals, each of which is sleeved on the flange, and the plurality of oil seals are connected in layers along the axial direction of the flange.

According to the loader driving gear structure provided in an embodiment of the present application, the plurality of oil seals include:

an inner oil seal, the interference fit between the inner oil seal and the bottom end of the side wall of the flange;

An outer oil seal, the outer oil seal is in interference fit with the side wall of the flange, and the outer oil seal is connected to the top surface of the inner oil seal.

According to the loader driving gear structure provided in one embodiment of the present application, the outer oil seal is a single-pair lip oil seal, and the inner oil seal is the single-pair lip oil seal or no auxiliary lip oil seal.

According to the loader driving gear structure provided in one embodiment of the present application, the driving gear includes:

gear department;

A shaft part, the shaft part is coaxially connected with the gear part, and the flange is sleeved on the shaft diameter of the end of the shaft part away from the gear part.

According to the loader driving gear structure provided in an embodiment of the present application, the loader driving gear structure further includes:

a lock nut, the lock nut is sleeved on the end of the shaft part away from the gear part;

A lock nut washer, the lock nut washer is sleeved on the shaft, and the lock nut washer is arranged between the lock nut and the flange.

The application also provides a loader final reducer, including:

a bracket, the top of which is provided with an opening;

The loader driving gear structure, the input end of the driving gear protrudes from the opening, the flange is arranged at the opening, and each of the oil seals is sleeved on the flange and the bracket between;

a passive gear, the passive gear is arranged in the bracket, and the passive gear is meshed with the driving gear;

A differential gear assembly, the differential gear assembly is arranged in the bracket, and the differential gear assembly is rotatably matched with the driven gear.

According to the loader main reducer provided in an embodiment of the present application, the loader main reducer further includes:

A dustproof cover, the dustproof cover comprising: an inner ring surface, an outer ring surface, and a connection surface connecting the inner ring surface and the outer ring surface;

The connecting face shield is arranged on the top surface of the oil seal at the top, the inner ring surface is connected to the flange, and the outer ring surface is embedded in the bracket.

a first rolling bearing and a second rolling bearing arranged coaxially;

Both the first rolling bearing and the second rolling bearing are sleeved on the driving gear, and both the first rolling bearing and the second rolling bearing are located between the driving gear and the bracket.

The third rolling bearing; the third rolling bearing is sleeved on the output shaft of the differential assembly, and the third rolling bearing is located between the output shaft of the differential assembly and the shoe seat.

The present application also provides a loader, including: the above-mentioned loader main reducer; Each of the oil seals is sleeved between the flange and the bracket; the driven gear is arranged in the bracket, and the driven gear is meshed with the driving gear; the differential assembly, the differential assembly is arranged in the bracket, and the differential assembly is rotatably engaged with the driven gear.

The loader drive gear structure, the loader main reducer and the loader provided in the embodiment of the present application are provided by a plurality of oil seals sleeved on the flange connected to the drive gear, and the multiple oil seals are stacked and connected along the axial direction of the flange , so that the oil seal set on the outside can prevent external dust from entering the interior of the main reducer of the loader and reduce the wear of the oil seal. At the same time, the oil seal set on the inside can prevent oil leakage inside the main reducer of the loader. performance, preventing oil leakage and significantly reducing the risk of oil leakage.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present application, those of ordinary skill in the art can also obtain other drawings based on these drawings without creative effort.

Fig. 1 is a schematic structural view of a loader main reducer provided in an embodiment of the present application;

Reference signs:

1: lock nut; 2: lock nut washer; 3: flange;

4: dust cover; 5: outer oil seal; 6: inner oil seal;

7: The first rolling bearing; 8: Driving gear; 9: The second rolling bearing;

10: Bracket; 11: Passive gear 12: Differential assembly;

13: Adjusting nut; 14: The third rolling bearing; 15: Adjusting nut washer.

16: bolt; 17: tile seat.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The loader driving gear structure of the embodiment of the present application will be described below with reference to FIG. 1 . The loader driving gear structure includes: a driving gear 8 and a plurality of oil seals (5, 6).

Wherein, the input end of the driving gear 8 is connected with the flange 3 . Each oil seal (5, 6) is sleeved on the flange 3, and a plurality of oil seals (5, 6) are stacked and connected along the axial direction of the flange 3.

In this embodiment, the oil seals (5, 6) are divided into an outer oil seal 5 and an inner oil seal 6. The inner oil seal 6 is arranged on the inner side, and the inner oil seal 6 is in interference fit with the bottom end of the side wall of the flange 3 . The outer oil seal 5 is arranged on the outer side, and the outer oil seal 5 is in interference fit with the side wall of the flange 3 , and the outer oil seal 5 is connected to the top surface of the inner oil seal 6 .

The input end of the driving gear 8 is generally directly connected with the output shaft of the external motor, and is driven by the external motor. During the rotation process of the driving gear 8 , a plurality of oil seals ( 5 , 6 ) are always sleeved on the flange 3 connected to the driving gear 8 . The outer oil seal 5 located on the outside can prevent external dust from entering into the main reducer of the loader and reduce the wear of the oil seal. The inner oil seal 6 located on the inner side can prevent oil leakage inside the final drive of the loader.

The quantity of oil seals (5, 6) can be adjusted according to actual working conditions, and when the oil seal effect is better, only two oil seals can be set. When the oil seal effect is poor, the number of oil seals can be added. When three or more oil seals are installed, the middle oil seal acts as a buffer between the outer oil seal 5 and the inner oil seal 6. On the one hand, it can prevent external dust from entering the main reducer of the loader, and on the other hand, it can prevent the main reducer of the loader from Internal oil leaks.

In the loader driving gear structure provided by the embodiment of the present application, a plurality of oil seals are sleeved on the flange connected to the driving gear, and the plurality of oil seals are stacked and connected along the axial direction of the flange, so that the oil seals arranged on the outside can prevent external Dust enters the main reducer of the loader to reduce the wear of the oil seal. At the same time, the oil seal installed on the inside can prevent oil leakage inside the main reducer of the loader. The structure of multiple oil seals can effectively improve the sealing performance, prevent oil leakage, and significantly reduce leakage. oil risk.

Oil seals (5, 6) usually adopt the same oil seal. For example, when a double oil seal structure is adopted, the outer oil seal 5 and the inner oil seal 6 generally adopt a single lip oil seal, and the auxiliary lips on the outer oil seal 5 and inner oil seal 6 play the role of sealing fluid.

If the sealing effect of the outer oil seal 5 is always effective, the dustproof effect of the inner oil seal 6 will be redundant. Therefore, two different oil seals can also be used, the outer oil seal 5 uses a single auxiliary lip oil seal, and the inner oil seal 6 uses an oil seal without an auxiliary lip.

In order to improve the oil seal effect, multiple lip oil seals can also be used, and the sealing effect can be further improved through the dual functions of the inner and outer multiple lip oil seals.

In this embodiment, the driving gear 8 is a driving spiral bevel gear, mainly including: a gear part and a shaft part. The shaft part is coaxially connected with the gear part, and the flange 3 is sleeved on the shaft diameter of the end of the shaft part away from the gear part. The shaft part is connected with the output shaft of the external motor, the shaft part is driven by the external motor, and when the shaft part rotates, it can drive the gear part to rotate.

The loader driving gear structure also includes: a lock nut 1 and a lock nut washer 2 . The lock nut 1 is sheathed on the end of the shaft part away from the gear part. The lock nut gasket 2 is sleeved on the shaft, and the lock nut gasket 2 is arranged between the lock nut 1 and the flange 3 . The flange 3 can be fixed on the driving gear 8 through the lock nut 1 and the lock nut washer 2, so as to prevent the flange 3 from deflecting relative to the driving gear 8 when the driving gear 8 rotates.

The embodiment of the present application also provides a loader main reducer. As shown in FIG. 1 , the loader main reducer includes: a bracket 10 , a loader driving gear structure, a driven gear 11 and a differential assembly 12 .

Wherein, the top of the bracket 10 is provided with an opening, and the loader driving gear structure includes: a driving gear 8 and a plurality of oil seals (5, 6). The input end of the driving gear 8 protrudes from the opening, the flange 3 is arranged at the opening, and each oil seal (5, 6) is sleeved between the flange 3 and the bracket 10; multiple oil seals (5, 6) are arranged along the Axial stack connection of flange 3. The driven gear 11 is arranged in the bracket 10 , and the driven gear 11 is engaged with the driving gear 8 . The differential gear assembly 12 is arranged in the bracket, and the differential gear assembly 12 is rotatably matched with the driven gear 11 .

When the double oil seal structure is adopted, the inner oil seal 6 is in interference fit with the bottom end of the side wall of the flange 3; the outer oil seal 5 is in interference fit with the side wall of the flange 3, and the outer oil seal 5 is connected to the top surface of the inner oil seal 6.

During normal operation, the external motor first drives the flange 3 to rotate, and the flange 3 drives the driving gear 8 to rotate, and then the driving gear 8 drives the driven gear 11 to rotate, and the driven gear 11 drives the differential assembly 12 to revolve in the bracket 10 , the side gears on both sides of the planetary gear meshing revolve in the bracket 10 together with the differential assembly 12 . During the rotation process of the driving gear 8 , a plurality of oil seals ( 5 , 6 ) are always sleeved on the flange 3 connected to the driving gear 8 . The outer oil seal 5 positioned at the outside can prevent external dust from entering the inside of the final drive of the loader, reducing the wear and tear of the oil seal. The inner oil seal 6 located on the inner side can prevent oil leakage inside the final drive of the loader.

In order to prevent external dust from entering the oil seal, the main reducer of the loader also includes: dust cover 4. The dust cover 4 includes: an inner ring surface, an outer ring surface and a connecting surface connecting the inner ring surface and the outer ring surface. The connecting mask is arranged on the top surface of the top oil seal, that is, the connecting mask is arranged on the top surface of the outer oil seal 5 , the inner ring surface is connected with the flange, and the outer ring surface is embedded in the slot of the bracket 10 . External dust needs to pass through the dust cover 4 before entering the oil seal, that is, the dust cover 4 prolongs the path for dust to enter the oil seal, reduces the wear of the inner and outer oil seals, thereby reducing the risk of oil leakage.

In order to avoid the abnormal sound and jamming failure of the main reducer of the rear loader due to different shafts. The main reducer of the loader further includes: a first rolling bearing 7 and a second rolling bearing 9 arranged coaxially. Both the first rolling bearing 7 and the second rolling bearing 9 are sleeved on the driving gear 8 , and both the first rolling bearing and the second rolling bearing are located between the driving gear 8 and the bracket 10 .

The first rolling bearing 7 and the second rolling bearing 9 are equivalent to the cantilever structure of the driving gear 8. The double bearing design of the first rolling bearing 7 and the second rolling bearing 9 solves the difficulty in controlling the coaxiality of the three bearings of the conventional horseback structure. This reduces the difficulty of assembly, thereby reducing the abnormal sound and jamming failure of the main reducer of the rear loader due to different shafts.

Correspondingly, the final drive of the loader further includes: a third rolling bearing 14 . The third rolling bearing 14 is sleeved on the output shaft of the differential gear assembly 12 , and the third rolling bearing 14 is located between the output shaft of the differential gear assembly 12 and the shoe seat 17 .

Since in this embodiment, the differential gear assembly 12 is provided with two output shafts, a third rolling bearing 14 can be arranged on each output shaft, and the differential gear assembly is formed by setting the third rolling bearing 14 on the bracket 10 The cantilever structure of 12 guarantees the normal operation of the 12 output shafts of the differential assembly.

In order to facilitate the adjustment of the installation position of the bracket 10, at the same time ensure the firmness of the bracket 10 and its internal structure. The bracket 10 can be connected with the internal structure through an adjustment nut 13 .

For example, the bracket 10 and the differential assembly 12 can be connected through the adjustment nut 13, and the adjustment nut washer 15 is set on the adjustment nut 13, and the adjustment nut 13 passes through the adjustment nut washer 15, the bracket 10 and the differential The device assembly 12 is connected. Therefore, the distance between the bracket 10 and the differential assembly 12 can be controlled by adjusting the tightness of the adjusting nut 13 .

Similarly, the bracket 10 can also be connected with the driving gear 8 or the driven gear 11 through the adjusting nut 13 . The distance of the bracket 10 relative to the driving gear 8 or the driven gear 11 is controlled by adjusting the tightness of the adjusting nut 13 .

In addition, in order to facilitate the radial positioning of the differential assembly 12, bolts 16 can also be added on at least one output shaft of the differential assembly 12, and the bolts 16 are plugged on one side of the output shaft in the radial direction, The tightness of 16 can fine-tune the position of the output shaft.

The main reducer of the loader provided in the embodiment of the present application is provided with the above-mentioned loader driving gear structure, and a plurality of oil seals are sleeved on the flange connected to the driving gear, and the plurality of oil seals are stacked and connected along the axial direction of the flange , so that the oil seal set on the outside can prevent external dust from entering the interior of the main reducer of the loader and reduce the wear of the oil seal. At the same time, the oil seal set on the inside can prevent oil leakage inside the main reducer of the loader. performance, preventing oil leakage and significantly reducing the risk of oil leakage.

The embodiment of the present application also provides a loader, which includes: a final reducer for the loader. As shown in FIG. 1 , the loader main reducer includes: a bracket 10 , a loader driving gear structure, a driven gear 11 and a differential assembly 12 . The top of the bracket 10 is provided with an opening, and the loader driving gear structure includes: a driving gear 8 and a plurality of oil seals (5, 6). The input end of the driving gear 8 protrudes from the opening, the flange 3 is arranged at the opening, and each oil seal (5, 6) is sleeved between the flange 3 and the bracket 10; multiple oil seals (5, 6) are arranged along the Axial stack connection of flange 3. The driven gear 11 is arranged in the bracket 10 , and the driven gear 11 is engaged with the driving gear 8 . The differential gear assembly 12 is arranged in the bracket, and the differential gear assembly 12 is rotatably matched with the driven gear 11 .

For the specific structure of the final drive of the loader, reference can be made to the above-mentioned embodiments, and details will not be repeated here.

The loader provided in the embodiment of the present application is equipped with the above-mentioned loader driving gear structure, and multiple oil seals are sleeved on the flange connected to the driving gear, and multiple oil seals are stacked and connected along the axial direction of the flange, so that the set The oil seal on the outer side can prevent external dust from entering the main reducer of the loader and reduce the wear of the oil seal. At the same time, the oil seal on the inner side can prevent oil leakage inside the main reducer of the loader. Oil leakage, significantly reducing the risk of oil leakage.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

A loader driving gear structure, comprising:

a driving gear, the input end of the driving gear is connected with a flange;

A plurality of oil seals, each of which is sleeved on the flange, and the plurality of oil seals are connected in layers along the axial direction of the flange.
The loader driving gear structure according to claim 1, wherein the plurality of oil seals include:

an inner oil seal, the interference fit between the inner oil seal and the bottom end of the side wall of the flange;

An outer oil seal, the outer oil seal is in interference fit with the side wall of the flange, and the outer oil seal is connected to the top surface of the inner oil seal.
The driving gear structure of the loader according to claim 2, wherein the outer oil seal is a single lip oil seal, and the inner oil seal is the single lip oil seal or no auxiliary lip oil seal.
The loader driving gear structure according to claim 1, wherein the driving gear comprises:

gear department;

A shaft part, the shaft part is coaxially connected with the gear part, and the flange is sleeved on the shaft diameter of the end of the shaft part away from the gear part.
The loader driving gear structure according to claim 4, further comprising:

a lock nut, the lock nut is sleeved on the end of the shaft part away from the gear part;

A lock nut washer, the lock nut washer is sleeved on the shaft, and the lock nut washer is arranged between the lock nut and the flange.
A loader main reducer, comprising:

a bracket, the top of which is provided with an opening;

The loader driving gear structure according to any one of claims 1-5, wherein the input end of the driving gear protrudes from the opening, the flange is arranged at the opening, and each of the oil seals are sleeved between the flange and the bracket;

a passive gear, the passive gear is arranged in the bracket, and the passive gear is meshed with the driving gear;

A differential gear assembly, the differential gear assembly is arranged in the bracket, and the differential gear assembly is rotatably matched with the driven gear.
The loader main reducer according to claim 6, further comprising:

A dustproof cover, the dustproof cover comprising: an inner ring surface, an outer ring surface, and a connection surface connecting the inner ring surface and the outer ring surface;

The connecting face shield is arranged on the top surface of the oil seal at the top, the inner ring surface is connected to the flange, and the outer ring surface is embedded in the bracket.
The loader main reducer according to claim 6, further comprising:

a first rolling bearing and a second rolling bearing arranged coaxially;

Both the first rolling bearing and the second rolling bearing are sleeved on the driving gear, and both the first rolling bearing and the second rolling bearing are located between the driving gear and the bracket.
The loader main reducer according to claim 6, further comprising:

The third rolling bearing; the third rolling bearing is sleeved on the output shaft of the differential assembly, and the third rolling bearing is located between the output shaft of the differential assembly and the shoe seat.
A loader, comprising: the loader main reducer according to any one of claims 6-9.