CN219452827U - Transfer case for automobile - Google Patents

Abstract

The utility model belongs to the technical field of transfer cases for automobiles, and particularly relates to a transfer case for an automobile, which comprises a case body and is characterized in that: the device also comprises an input shaft and an output shaft; the box body is formed by detachably and cooperatively installing a plurality of shells, and is provided with an input shaft first hole, an input shaft second hole and an output shaft hole; the input shaft is in rotary connection with the box body through a first bearing group, and a first bevel gear is fixedly connected to the input shaft; the output shaft is in rotary connection with the box body through a second bearing group, and a second bevel gear is fixedly connected with one end of the output shaft positioned in the box body; the input shaft and the output shaft are in transmission connection through a first bevel gear and a second bevel gear; the utility model realizes the optimization of the structure, reduces the noise during gear engagement, reduces the failure rate, and simultaneously realizes that the design standard can be achieved by selecting the conventional bearing, thereby reducing the maintenance cost.

Description

Transfer case for automobile

Technical Field

The utility model belongs to the technical field of transfer cases for automobiles, and particularly relates to a transfer case for an automobile.

Background

The transfer case is a device for distributing power of an engine, and may output power to a rear axle or to both front and rear axles. With the development of the technology in the automobile industry, transfer cases are changed all the time, transfer cases with different styles are gradually formed, and the transfer cases are matched on automobiles with different requirements, and the basic principles and functions of the transfer cases are different.

The current transfer case market problems are: after a period of use, the problem of abnormal gear engagement noise is remarkable, and the problem is mainly characterized in that the bearing is more damaged, so that abnormal noise and performance of the transfer case are lost; in addition, in order to improve the service life, the requirements on the bearings of the vulnerable parts are high, and the after-market prices are high, so that the maintenance cost is high.

Disclosure of Invention

In order to solve the technical problems, the transfer case for the automobile provided by the utility model has the advantages that the optimization of the structure is realized, the noise during gear engagement is reduced, the failure rate is reduced, the design standard can be achieved by selecting a conventional bearing, and the maintenance cost is reduced.

A transfer case for an automobile comprises a case body, an input shaft and an output shaft; the box body is formed by detachably and cooperatively installing a plurality of shells, and is provided with an input shaft first hole, an input shaft second hole and an output shaft hole; the input shaft is in rotary connection with the box body through a first bearing group, and a first bevel gear is fixedly connected to the input shaft; the output shaft is in rotary connection with the box body through a second bearing group, and a second bevel gear is fixedly connected with one end of the output shaft positioned in the box body; the input shaft and the output shaft are in transmission connection through a first bevel gear and a second bevel gear, and one end, far away from the first bevel gear, of the input shaft is connected with the power element.

Through adopting this technical scheme, this structural design has reduced gear quantity, compact structure has reduced the number of times that appears the abnormal sound problem of gear, has reduced the fault rate, has prolonged life, even appears the bearing damage, uses conventional bearing also can reach design standard, has reduced cost of maintenance, and this technical scheme simple structure in addition, it is convenient to change the bearing.

Preferably, the input shaft is a hollow shaft, one end of the input shaft is positioned in the box body, the other end of the input shaft is positioned outside the box body, and a port positioned at one end in the box body is provided with fluororubber oil seal.

Preferably, the first hole of the input shaft and the second hole of the input shaft are respectively provided with double oil seal, and the output shaft hole is provided with oil seal.

By adopting the technical scheme of oil seal sealing, better sealing effect and lower purchasing cost are realized.

Preferably, one end of the output shaft far away from the second bevel gear is fixedly connected with an output flange.

Preferably, the output flange is splined to the output shaft.

By adopting the technical scheme, the output flange is more stably fixed, and the failure rate is reduced.

Preferably, the input shaft and the first bevel gear are in hole-shaft transition fit, a plurality of threaded holes are formed in the conical bottom end face of the first bevel gear, the input shaft is provided with a shaft shoulder for fixing the first bevel gear, and holes matched with the threaded holes are formed in the end face of the shaft shoulder.

Through adopting this technical scheme, realized the fixed to first bevel gear and input shaft, axial, radial and circumference are all fixed, can effectively avoid abnormal sound, reduced the fault rate of gear, improved life, avoid the impact to the bearing in the transmission process, reduced the fault rate of bearing.

Preferably, the first bearing group comprises a first bearing and a second bearing, the first bearing is arranged at a position, close to the first hole of the input shaft, of the box body, the second bearing is arranged at a position, close to the second hole of the input shaft, of the box body, and the first bearing and the second bearing are single-row tapered roller bearings.

Preferably, the second bearing group is a double row angular contact ball bearing.

By adopting the technical scheme, the static load and the dynamic load are greatly improved, the common abnormal sound and bearing damage faults of the market automobiles are solved, and the single-row tapered roller bearing and the double-row angular contact ball bearing are conventional bearings, so that the maintenance cost is greatly reduced.

Preferably, the output shaft and the second bevel gear are integrally formed bevel gear shafts.

Through adopting integrated into one piece's bevel gear axle, compare in the cooperation installation, can effectively reduce the fault rate of output shaft and second bevel gear, assemble simultaneously and also save time and manpower more.

Preferably, the tooth surfaces of the first bevel gear and the second bevel gear are subjected to a gear grinding process and a heat treatment process, the roughness is not lower than Ra0.8, and the hardness is HRC58-63.

By adopting the technical scheme, the strength of the bevel gear is improved, and the noise of the engagement of the bevel gear is reduced.

In summary, the utility model has the following beneficial technical effects:

1. through adopting this technical scheme, this structural design has reduced gear quantity, compact structure has reduced the number of times that appears the abnormal sound problem of gear, has reduced the fault rate, has prolonged life, even appears the bearing damage, uses conventional bearing also can reach design standard, has reduced cost of maintenance, and this technical scheme simple structure in addition, it is convenient to change the bearing.

2. The first bevel gear and the input shaft are fixed through screw connection, so that the axial direction, the radial direction and the circumferential direction of the first bevel gear are all fixed, abnormal noise can be effectively avoided, the failure rate of the gear is reduced, the service life is prolonged, the impact on the bearing in the transmission process is avoided, and the failure rate of the bearing is reduced.

3. Through the design to the bearing, realized static load and dynamic load and promoted by a wide margin, solved the common abnormal sound of market car and the trouble that the bearing damaged, single row tapered roller bearing and biserial angular contact ball bearing are conventional bearing, greatly reduced cost of maintenance.

Drawings

FIG. 1 is a schematic diagram of a transfer case in semi-section for an automobile;

FIG. 2 is a schematic illustration of an input shaft;

FIG. 3 is a schematic diagram of an output shaft;

FIG. 4 is an enlarged view of a portion of the portion I of FIG. 1;

fig. 5 is an enlarged view of a portion at ii in fig. 1.

Reference numerals illustrate:

1. a case; 11. an input shaft first bore; 12. an input shaft second bore; 13. an output shaft hole;

2. an input shaft; 3. an output shaft; 4. a first bearing set; 41. a first bearing; 42. a second bearing;

5. a first bevel gear; 6. a second bearing group; 7. a second bevel gear; 8. and (5) outputting a flange.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the specific examples.

The embodiment of the utility model discloses a transfer case for an automobile, which comprises a case body 1, an input shaft 2 and an output shaft 3, and is disclosed with reference to fig. 1-3; the box body 1 is formed by detachably and cooperatively installing a plurality of shells, and an input shaft first hole 11, an input shaft second hole 12 and an output shaft hole 13 are formed in the box body 1; the input shaft 2 is in rotary connection with the box body 1 through a first bearing group 4, and a first bevel gear 5 is fixedly connected to the input shaft 2; the output shaft 3 is in rotary connection with the box body 1 through a second bearing group 6, the second bearing group 6 adopts a double-row angular contact ball bearing, one end of the output shaft 3 positioned in the box body 1 is fixedly connected with a second bevel gear 7, and the output shaft 3 and the second bevel gear 7 are integrally formed bevel gear shafts; the input shaft 2 and the output shaft 3 are in transmission connection through a first bevel gear 5 and a second bevel gear 7, one end, far away from the first bevel gear 5, of the input shaft 2 is connected with a power element, one end, far away from the second bevel gear 7, of the output shaft 3 is fixedly connected with an output flange 8, and the output flange 8 is connected with the output shaft 3 through a spline.

Referring to fig. 2, the input shaft 2 is a hollow shaft, one end of the input shaft 2 is located in the case 1, the other end is located outside the case 1, and a port located at one end in the case 1 is provided with a fluororubber oil seal.

Referring to fig. 1, 4 and 5, the input shaft first hole 11 and the input shaft second hole 12 are provided with double oil seal seals, and the output shaft hole 13 is provided with oil seal seals.

Referring to fig. 2, an input shaft 2 is in transition fit with a first bevel gear 5 by adopting a hole shaft, a plurality of threaded holes are formed in the conical bottom end face of the first bevel gear 5 and are used for being in threaded fixation with the input shaft 2, the input shaft 2 is provided with a shaft shoulder for fixing the first bevel gear 5, and a hole matched with the threaded hole is formed in the end face of the shaft shoulder.

Referring to fig. 1, 2 and 4, the first bearing set 4 includes a first bearing 41 and a second bearing 42, where the first bearing 41 is disposed near the first hole 11 of the input shaft of the housing 1, the second bearing 42 is disposed near the second hole 12 of the input shaft of the housing 1, and the first bearing 41 and the second bearing 42 are both single-row tapered roller bearings.

The first bevel gear 5 and the second bevel gear 7 are subjected to gear grinding and heat treatment processes so as to achieve the gear tooth surface roughness of not less than Ra0.8 and the hardness of HRC58-63.

The transmission route of the technical scheme is as follows: input shaft 2→first bevel gear 5→second bevel gear 7→output flange 8. The technical scheme in the implementation realizes that the static load and the dynamic load of the bearing are increased by more than 10% -15%, and the cost is reduced by 50% -75%.

The foregoing is a further detailed description of the utility model, along with the accompanying drawings and examples, in order to provide a better understanding of the objects, aspects and advantages of the utility model. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Claims (10)

1. Transfer case for car, including box (1), its characterized in that: the device also comprises an input shaft (2) and an output shaft (3);

the box body (1) is formed by detachably and cooperatively installing a plurality of shells, and an input shaft first hole (11), an input shaft second hole (12) and an output shaft hole (13) are formed in the box body (1);

the input shaft (2) is in rotary connection with the box body (1) through a first bearing group (4), and a first bevel gear (5) is fixedly connected to the input shaft (2);

the output shaft (3) is in rotary connection with the box body (1) through a second bearing group (6), and one end of the output shaft (3) positioned in the box body (1) is fixedly connected with a second bevel gear (7);

the input shaft (2) and the output shaft (3) are in transmission connection through a first bevel gear (5) and a second bevel gear (7).

2. The transfer case for an automobile according to claim 1, wherein the input shaft (2) is a hollow shaft, one end of the input shaft (2) is located in the case (1), the other end of the input shaft is located outside the case (1), and an oil seal is arranged at a port located at one end in the case (1).

3. The transfer case for an automobile according to claim 1, wherein double oil seal seals are arranged on the first hole (11) of the input shaft and the second hole (12) of the input shaft, and oil seal seals are arranged on the output shaft hole (13).

4. The transfer case for an automobile according to claim 1, wherein one end of the output shaft (3) far away from the second bevel gear (7) is fixedly connected with an output flange (8).

5. A transfer case for an automobile according to claim 4, characterized in that the output flange (8) is splined to the output shaft (3).

6. The transfer case for the automobile according to claim 1, wherein the input shaft (2) and the first bevel gear (5) are in hole-shaft transition fit, a plurality of threaded holes are formed in the conical bottom end face of the first bevel gear (5), a shaft shoulder for fixing the first bevel gear (5) is arranged on the input shaft (2), and a hole matched with the threaded holes is formed in the shaft shoulder end face.

7. The transfer case for an automobile according to any one of claims 3-6, wherein the first bearing set (4) comprises a first bearing (41) and a second bearing (42), the first bearing (41) is arranged at a position, close to the first hole (11) of the input shaft, of the case (1), the second bearing (42) is arranged at a position, close to the second hole (12) of the input shaft, of the case (1), and the first bearing (41) and the second bearing (42) are single-row tapered roller bearings.

8. The transfer case for an automobile according to any one of claims 1 to 6, characterized in that the second bearing set (6) is a double row angular contact ball bearing.

9. A transfer case for an automobile according to claim 1, characterized in that the output shaft (3) and the second bevel gear (7) are integrally formed bevel gear shafts.

10. The transfer case for an automobile according to claim 1, wherein the first bevel gear (5) and the second bevel gear (7) have tooth surface roughness of not less than Ra0.8 and hardness of HRC58-63.