KR200181792Y1 - Pinion shaft fixing device for a car - Google Patents

Abstract

The present invention efficiently fixes the pinion shaft supporting the pinion gear installed in the vehicle's differential device to the deep case efficiently, and at the same time prevents the pinion shaft from interfering with the pinion shaft and the drive pinion gear. In the improvement of the structure, a deep pinion gear (30) rotatably supported on the deep side gear (20) and the pinion shaft (40) is provided in the deep case (10), and the outer side of the deep case (10). In the vehicle differential device is coupled to the ring gear 50, the drive pinion gear 60 is coupled to the drive pinion gear 60 receives power from the propulsion shaft, both ends of the pinion shaft 40 on the inner circumference of the ring gear 50; It is characterized in that the protruding configuration of the extension portion 52 located in.

Description

Pinion shaft fixing structure of automotive differential

The present invention relates to a pinion shaft fixing structure of a vehicle differential device. More specifically, the pinion shaft supporting a pinion gear installed in a vehicle differential device can be efficiently fixed to the deep case as well as a pinion shaft. The present invention relates to an improvement in the fixing structure of the pinion shaft, which can prevent interference between the drive pinion gear and the drive pinion.

In general, the differential device of the vehicle receives the power of the propulsion shaft and transmits it to the driving wheel, but provides stability of the curved driving by adjusting the rotation amount of the left and right driving wheels when driving the curve of the vehicle. It relates to a fixing structure of the pinion shaft which is one of the components to constitute.

Referring to FIG. 1 of the prior art, which has been carried out so far, a deep case 10 having a built-in differential device is provided, and a deep side gear 20 is provided inside the deep case 10. And a deep pinion gear 30 meshed with the deep side gear 20 at right angles. In addition, both ends of the deep pinion gear 30 are rotatably supported by the pinion shaft 40 supported by the deep case 10. The pinion shaft 40 is fixed to the deep case 10 by a pin 42. On the other hand, a ring gear 50 is bolted to the outside of the deep case 10, and a drive pinion gear 60 for decelerating and transmitting power of a propulsion shaft (not shown) is engaged with the ring gear 50. .

The action of the pinion shaft fixing structure of the conventional vehicle differential having the above configuration is as follows.

When the drive pinion gear 60 rotates, the ring gear 50 decelerates and rotates due to the gear ratio, and the deep case 10 rotates accordingly. Rotation of the deep case 10 is accompanied by the rotation of the pinion shaft 40, whereby the deep pinion gear 30 and the deep side gear 20 is connected to transfer power to both wheels. During this operation, the pinion shaft 40 is detached from the deep case 10 and hits the drive pinion gear 60. In order to prevent this, the pinion shaft 40 is deflected using the pin 42. It is fixed to the case 10.

However, such a prior art is fixed to the pinion shaft 40 by using the pin 42, the number of parts is increased, as well as requires a separate machining process for fitting the pin 42 on the pinion shaft 40. There is a problem. In addition, since the caulking operation is performed to prevent the pin 42 from being separated after the pin 42 is inserted, the pinion shaft 40 has a very troublesome fixing operation. In particular, there is a problem that the entire pinion gear is damaged by the pinion shaft 40 being detached and colliding with the drive pinion gear 60 due to the pin 42 not being able to withstand the load during operation after the pinion shaft 40 is fixed.

The object of the present invention is to solve the conventional problems as described above, and as a simpler structure to achieve the pinion shaft fixed while improving the assembly, and completely eliminate the fear of interference between the pinion shaft and the drive pinion gear. The present invention provides a pinion shaft fixing structure of a vehicle differential device.

1 is a cross-sectional view showing the phrase of the prior art

2 is a cross-sectional view showing the configuration of the subject innovation

* Explanation of symbols for main parts of the drawings

10: Deep Case 20: Deep Side Gear

30: Deep Pinion Gear 40: Pinion Shaft

50: ring gear 52: extension part

60: Drive Pinion Gear

The purpose of the present invention described above, a deep pinion gear rotatably supported on the deep side gear and the pinion shaft is installed in the deep case, the drive pinion gear that receives power from the propulsion shaft is engaged with the outer side of the deep case. In a vehicle differential having a ring gear coupled thereto, it is possible to achieve by extending the extension parts located at both ends of the pinion shaft at the inner circumference of the ring gear so as to protrude from the pinion shaft. That is, by preventing the pinion shaft from being separated by the extension of the ring gear, the pinion shaft fixing pin is not required, and the assembling work can be easily performed.

Hereinafter, the most preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention.

The same configuration as the conventional one will be described using the same reference numeral. 2 is a cross-sectional view showing the configuration of the present invention, the deep case 10 is provided with a differential device inside, and the deep side gear 20 is installed inside the deep case 10. Then, the deep pinion gear 30 meshed with the deep side gear 20 at right angles is provided. The deep pinion gear 30 is rotatably supported at both ends of the pinion shaft 40 supported by the deep case 10. On the other hand, the ring gear 50 is bolted to the outer side of the deep case 10, the drive gear (60) for decelerating and transmitting the power of the propulsion shaft (not shown) is engaged with the ring gear 50. The inner circumference of the ring gear 50 protrudes upward from the pinion shaft 40 by a predetermined distance to form extension portions 52 positioned at both ends of the pinion shaft 40. This extension 52 prevents the pinion shaft 40 from escaping from the deep case 10.

According to the present invention having such a configuration, when the drive pinion gear 60 rotates, the ring gear 50 rotates decelerately by the gear ratio, and the deep case 10 rotates accordingly. Rotation of the deep case 10 is accompanied by the rotation of the pinion shaft 40, whereby the deep pinion gear 30 and the deep side gear 20 is rotated to transmit power to both wheels. During this operation, the pinion shaft 40 is separated from the deep case 10. At this time, since the extension 52 of the ring gear 50 blocks both ends of the pinion shaft 40, the pinion shaft 40 Collision with the drive pinion gear 60 can be prevented in advance. In this case, since the pinion shaft 40 and the ring gear 50 make the same rotation, it can be seen that friction due to mutual contact is not large. In addition, the pinion shaft 40 is fixed at the same time by fixing the ring gear 50 to the deep case (10). In addition, no friction occurs between the extension portion 52 and the pinion shaft 40 so that loss of the transfer energy does not occur.

According to the embodiment of the present invention as described above, by pinning the pinion shaft fixing pinion shaft by using the extension to the extension portion on the inner circumference of the ring gear, pin insertion of the pinion shaft is improved as well, especially pinion shaft departure By minimizing the possible factors, it is possible to prevent the damage of the differential device due to the interference between the pinion shaft and the dry pinion gear.

Claims (1)

The deep pinion gear 30 rotatably supported by the deep side gear 20 and the pinion shaft 40 is installed inside the deep case 10, and receives power from the propulsion shaft outside the deep case 10. In the automotive differential device in which the ring gear 50, in which the drive pinion gear 60 is meshed, is coupled, an extension 52 positioned at both ends of the pinion shaft 40 at an inner circumference of the ring gear 50. ) Pinion shaft fixed structure of the vehicle differential, characterized in that the pinion shaft 40 and a predetermined distance apart from the projecting configuration.