KR19990028309U - Axle shaft mounting structure of automobile - Google Patents

Abstract

The present invention relates to the improvement of the axle shaft mounting structure for transmitting power to the wheel by connecting the wheel and the side gear of the differential device.

The present invention relates to a housing (1) into which the propulsion shaft (2) is inserted, a ring gear (4) driven by a propulsion shaft in the housing (1), and a deep case (5) fixed to the ring gear (4). In a motor vehicle having a differential device having a fixed pair of drive pinion gears (3), the vehicle is rotatably supported by the deep case (5) so as to mate with the pinion gear (6) and to the outside of the housing (1). A side gear 100 having an extended extension shaft 110 integrally formed therein, a first shaft 122 coupled to the side gear 100, and a constant velocity joint 126 on the first shaft 122. It provides an axle shaft mounting structure of a vehicle including an axle shaft (120) consisting of a second shaft (124) coupled.

The present invention eliminates the fear of detachment of the axle shaft due to the rotational load, improves the assembly, as well as solves the problem of oil leakage because the housing is not opened during repair and replacement.

Description

Axle shaft mounting structure of automobile

The present invention relates to an axle shaft mounting structure of an automobile, and more particularly, axle shaft mounting with a constant velocity joint to prevent the impact of the differential by connecting the side gear and the wheel of the differential device to compensate for the wheel change angle. It is about improving the structure.

As is well known, an automobile generates power by burning fuel in an engine, and transmits this power to a driving wheel through a power transmission device to move the vehicle body forward or backward. The power transmission device includes a clutch, a transmission, a propulsion shaft, a universal joint, a differential gear autonomous system, and the like. Looking at their function schematically, the clutch transmits or blocks the power generated from the engine by the frictional force to the transmission, and in the automatic transmission vehicle is replaced by a torque converter using a fluid. The transmission is equipped with a plurality of gears to select the appropriate gear ratio according to the vehicle speed to reduce or increase the rotation of the engine. The propulsion shaft is connected to the output shaft of the transmission and is provided to transfer the power of the engine to the driving wheel without difficulty in moving up and down according to the impact of the road surface or the fluctuation of the dripping. The differential gear compensates for the difference in the number of revolutions occurring on the left and right wheels when turning or driving on uneven roads. If the vehicle is not provided with such a differential gear, one of the wheels is slippery when turning or driving on uneven roads, thereby making it impossible to achieve smooth driving.

In addition, the power transmission device includes an axle shaft connected to the differential gear to drive the wheel. In addition, the axle shaft is connected to the wheel that receives the impact from the road surface, so it includes a constant velocity joint to absorb the flow in the up, down and lateral directions.

1 shows a connection state between a constant velocity joint and a differential gear device. According to this, in the differential gear device, a propulsion shaft 2 is inserted into one side of a housing 1 forming a sealed space, and an end portion of the propulsion shaft 2 is provided. The drive pinion gear 3 is fixed to it. Inside the housing 1, a ring gear 4 which rotates in engagement with the drive pinion gear 3 and a deep case 5 fixed to the ring gear 4 and rotating together with the ring gear 4 are formed. Is installed. Inside the deep case 5, a pair of pinion gears 6 and a pair of side gears 7 meshing with the pinion gears 6 and driving the axle shaft 10 (only one side for convenience) are respectively provided. It is installed.

Each pinion gear 6 is rotatably supported by a pinion shaft 6a whose both ends are supported in the deep case 5, and each side gear 7 is in a direction orthogonal to the pinion shaft 6a. It is fixed to the ends of the axle shaft 10 inserted into the deep case 5 so as to face from both sides of the deep case 5. Each side gear 7 is meshed with the pinion gears 6 at both sides of the pinion shaft 6a.

On the other hand, the axle shaft (10) is connected to the first shaft (11) connected to the side gear (7), one end to the first shaft (11) by a constant velocity joint (13), and the other end to the wheel. It consists of the 2nd axis | shaft 12 which becomes. Since the constant velocity joint 13 is a well-known mechanical element, a detailed description thereof will be omitted.

The first shaft 11 is coupled to the side gear 7 by a spline and is provided with a retainer ring 14 for limiting axial separation.

However, the conventional axle shaft mounting structure as described above is inferior in assembly, and there is a concern that the axle shaft may be separated from the differential gear device, as well as having to replenish oil in the housing during replacement.

That is, in order to assemble the axle shaft 10, the axle shaft 10 is inserted into the housing 1 from the outside of the housing 1 and fitted to the side gear 7 embedded in the housing 1. After the retaining ring 14 is fastened to the end of the axle shaft 10 to limit the separation. Therefore, the work of fitting the side gear 7 and the axle shaft 10 is cumbersome, and the retainer ring 14 must be fastened in a relatively narrow space, thereby degrading workability. In addition, since the axle shaft 10 is fixed to the side gear 7 by the retainer ring 14, the retainer ring 14 is disengaged due to the rotational load, thereby causing the axle shaft 10 to be separated from the transmission. There is a problem that raises concern.

In particular, when the axle shaft 10 is repaired or replaced, the axle shaft 10 must be separated from the side gear 7, so that oil supplied in the housing 1 leaks for lubrication of the differential device. You will have the trouble of resupplying oil.

The present invention has been devised in view of the above problems, and its purpose is to improve the assemblability of the axle shaft and to limit the deviation from the side gear, and to install the axle shaft to prevent the oil in the housing from leaking during maintenance and replacement. In providing a structure.

1 is a cross-sectional view showing a conventional axle shaft mounting structure.

2 is a cross-sectional view showing an axle shaft mounting structure according to the present invention.

3 is an exploded perspective view showing the mounting structure of the axle shaft according to the present invention

♣ Explanation of symbols for the main parts of the drawing ♣

1: housing 2: propulsion shaft

3: drive pinion gear 4: ring gear

5: deep case 6: pinion gear

100: side gear 110: extension shaft

112: coupling groove 120: axle shaft

122: first axis 124: second axis

126: constant velocity joint 130: split pin

An object of the present invention as described above is a differential device having a housing into which a propulsion shaft is inserted, a ring gear driven by the propulsion shaft within the housing, and a pair of drive pinion gears fixed to a deep case fixed to the ring gear. An automobile having a side gear, the side gear rotatably supported by a deep case to be engaged with the driving pinion gear and having an extension shaft extending outwardly of the housing, and a first shaft coupled to the side gear; It can be achieved by the axle shaft mounting structure of the vehicle including an axle shaft consisting of a second shaft coupled to the side shaft by a constant velocity joint.

An end of the extension shaft forms a coupling groove in the longitudinal direction and inserts a first shaft into the coupling groove and installs a split pin penetrating the extension shaft and the first shaft to limit the separation of the extension shaft and the first shaft.

Hereinafter, with reference to the accompanying drawings illustrating a preferred embodiment of the axle shaft mounting structure of a vehicle according to the present invention is as follows. , The detailed description is omitted.)

2 shows a configuration of an axle shaft mounting structure according to the present invention, which is inserted into the propulsion shaft 2 on one side of the housing 1, and the drive pinion gear 3 is provided at the end of the propulsion shaft 2. It is constructed integrally. The housing 1 includes a ring gear 4 which is engaged with the drive pinion gear 3 and rotates therein and a deep case 5 which is fixed to the ring gear 4. In addition, a pair of pinion gears 6 arranged to face each other in the deep case 5 is supported by the pinion shaft 6a.

In addition, the deep case 5 includes a pair of side gears 100 meshing with the respective pinion gears 6, wherein the rotation centers of the pinion gears 6 and the side gears 100 are perpendicular to each other. Is placed.

According to the present invention, the pair of side gears 100 are integrally formed with an extension shaft 110 extending outwardly of the housing 1 to achieve rotation about the extension shaft 110.

On the other hand, the axle shaft 120 for transmitting power to the wheel is connected to the extension shaft 110. The axle shaft 120 has a first shaft 122 coupled with the extension shaft 110 of the side gear 100 and a second shaft 124 coupled with the wheel, and the first shaft 122 And a constant velocity joint 126 connecting the second shaft 124.

According to FIG. 3, an end of the extension shaft 110 is formed with a coupling groove 112 in the longitudinal direction to accommodate the first shaft 122. In addition, a split pin 130 penetrating the extension shaft 110 and the first shaft 122 in a state where the first shaft 122 is inserted into the coupling groove 112 is provided to extend the extension shaft 110 and the first shaft. It is configured to limit the detachment of the shaft 122. The coupling groove 112 and the first shaft 122 is splined to transfer the rotational force of the side gear 100 to the first shaft 122.

According to the present invention having such a configuration, when the side gear 100 is inserted into the housing 1, the extension shaft 110 maintains the state protruding to the outside of the housing 1. Accordingly, in this state, the first shaft 122 is inserted into the coupling groove 112, and the separation of the axle shaft 120 can be achieved by limiting the separation to the split pin 130. Therefore, it is possible to secure a sufficiently large assembly space, thereby improving workability. In addition, since the side gear 100 and the first shaft 122 are splined to each other, the rotational force is transmitted and the separation is restricted by the split pin 130, thereby eliminating the concern of separation due to the rotational load during driving.

When the axle shaft 120 is separated, the present invention removes the split pin 130 and smoothly separates from the coupling groove 112, so that the inside of the housing 1 is not opened so that the lubricated oil supplied to the housing is transferred to the outside. It will not leak.

As described above, the axle shaft mounting structure of the vehicle according to the present invention extends the rotation shaft of the side gear to the outside of the housing to form an extension shaft, and is coupled to the coupling groove formed in the longitudinal direction at the end of the extension shaft of the axle shaft to rotate This eliminates the possibility of the axle shaft falling off due to the load, and improves the assembly performance. The housing does not need to be opened during maintenance or replacement, so there is no fear of oil leakage.

Claims (2)

As long as it is fixed with respect to the housing 1 into which the propulsion shaft 2 is inserted, the ring gear 4 driven by the propulsion shaft in the housing 1, and the deep case 5 fixed to the ring gear 4. In a motor vehicle having a differential with a pair of pinion gears (6), A side gear (100) rotatably supported by the deep case (5) to be engaged with the pinion gear (6) and having an extension shaft (110) extending outwardly of the housing (1); An automobile including an axle shaft 120 including a first shaft 122 coupled to the side gear 100 and a second shaft 124 coupled to the first shaft 122 by a constant velocity joint 126. Axle shaft mounting structure. The method of claim 1, wherein the end of the extension shaft 110 is formed with a coupling groove 112 in the longitudinal direction, the first shaft 122 is inserted into the coupling groove 112 and at the same time the extension shaft 110 And a split pin 130 penetrating the first shaft 122 to restrict the separation of the extension shaft 110 and the first shaft 122.