Mounting structure for driven spiral bevel gear of drive axle of loader-digger

Abstract

The utility model discloses a mounting structure for a driven spiral bevel gear of a drive axle of a loader-digger. The driven spiral bevel gear and a differential assembly are fixed by a connecting bolt; the differential mechanism right shell is provided with two positioning pin holes for installing one ends of the positioning pins; two positioning pin holes for mounting the other ends of the positioning pins are formed in the driven spiral bevel gear; the differential mechanism right shell positioning pin hole and the driven spiral bevel gear positioning pin hole are consistent in aperture; the two positioning pins are symmetrically distributed on the same distribution circle; the differential mechanism right shell positioning pin hole and the driven spiral bevel gear positioning pin hole are stepped holes, and the hole diameter close to the disc tooth installation face side is large. And the positioning pin is in transition fit with the positioning pin hole. The limiting cylindrical pin is simple and compact in structure, long in service life and safe and reliable in operation, and solves the problems that in the prior art, in the interference fit assembling process between the limiting cylindrical pin and a related pin hole, a riveting edge is likely to occur, the riveting edge falls into a differential assembly during operation, and the cylindrical pin is likely to fall off after long-term use.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator drive axle technical field, concretely relates to excavator drive axle passive spiral bevel gear mounting structure. BACKGROUND

[0002] In order to guarantee the installation precision of the passive spiral bevel gear of the drive axle of the engineering machinery, the differential assembly and the passive spiral bevel gear are often limited by two cylindrical locating pins in the prior art, and are fixed together by bolts. Because the interference fit is adopted between the cylindrical pin and the related pin hole, there are the following two defects: first, it is difficult to avoid the riveting edge phenomenon in the actual assembly process, and these extrudates are easy to fall into the differential assembly during work and affect the product quality, and second, the cylindrical pin is easy to fall out during long-term use. SUMMARY

[0003] The utility model discloses a simple and compact structure, low cost of manufacture and maintenance, long product service life, safe and reliable operation of excavator drive axle passive spiral bevel gear mounting structure, solve the prior art limiting the interference fit between the cylindrical pin and the related pin hole during assembly process Riveting edge makes riveting edge fall into differential assembly during operation and long-term use is easy to appear the problem of cylindrical pin falling out.

[0004] To realize above -mentioned purpose, the utility model excavator drive axle passive spiral bevel gear mounting structure including differential assembly 1, differential right -hand housing 1.1, passive spiral bevel gear 2, locating pin 3 and connecting bolt 4, passive spiral bevel gear 2 with differential assembly 1 is connected fixed with connecting bolt 4, the differential right -hand housing 1.1 is equipped with two differential right -hand housing locating pin hole 1.1.1 for installing the one end of locating pin 3, this differential right -hand housing locating pin hole 1.1.1 is stepped hole, and the aperture is larger near the disc tooth mounting face side, passive spiral bevel gear 2 is equipped with two passive spiral bevel gear locating pin hole 2.1 for installing the other end of locating pin 3, this passive spiral bevel gear locating pin hole 2.1 is stepped hole, and the aperture is larger near the disc tooth mounting face side, the differential right -hand housing locating pin hole 1.1.1 and passive spiral bevel gear locating pin hole 2.1 aperture are consistent, locating pin 3 is equipped with two, symmetric distribution is on same distribution circle, the cooperation of this locating pin 3 and differential right -hand housing locating pin hole 1.1.1 and passive spiral spiral bevel gear locating pin hole 2.1 is transition fit.

[0005] The excavator drive axle passive spiral bevel gear mounting structure has the following technical features and advantages by setting the stepped hole on the differential housing and the passive spiral bevel gear:

[0006] 1. By setting the positioning pin mounting hole on the differential housing and the driven spiral bevel gear as a stepped hole, and using a transition fit between the positioning pin and the positioning pin mounting hole, the installation precision of the driven spiral bevel gear 2 and the differential assembly 1 can be effectively ensured, and at the same time, the riveting edge phenomenon during assembly can be avoided, the cleanliness of the inner cavity of the drive axle is improved, the service life of the related gear parts is improved, and at the same time, the positioning pin holes on the driven spiral bevel gear 2 and the differential right housing 1.1 are designed as stepped holes, which can effectively prevent the risk of the positioning pin 3 being pulled out during use, and improve the service life of the product.

[0007] 2. The structure is simple, compact, low in manufacturing cost, safe and reliable in operation, and long in service life. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a front view structural schematic diagram of the excavator drive axle driven spiral bevel gear mounting structure of the utility model.

[0009] Figure 2 is Figure 1 A-A sectional view structural schematic diagram.

[0010] Figure 3 is Figure 2 A partial sectional view schematic diagram of the differential right housing 1.1.

[0011] Figure 4 is Figure 2 A partial sectional view schematic diagram of the driven spiral bevel gear 2.

[0012] Reference signs: differential assembly 1, differential right housing 1.1, right housing positioning pin hole 1.1.1, driven spiral bevel gear 2, driven spiral bevel gear positioning pin hole 2.1, positioning pin 3, connecting bolt 4. DETAILED DESCRIPTION

[0013] The specific embodiments of the excavator drive axle driven spiral bevel gear mounting structure of the utility model will be further described in detail below with reference to the drawings.

[0014] Figures 1-4As shown, the excavator drive axle passive spiral bevel gear mounting structure comprises a differential assembly 1, a differential right shell 1.1, a passive spiral bevel gear 2, a positioning pin 3 and a connecting bolt 4, the connecting bolt 4 connects and fixes the passive spiral bevel gear 2 and the differential assembly 1, the differential right shell 1.1 is provided with two differential right shell positioning pin holes 1.1.1 for mounting one end of the positioning pin 3, the differential right shell positioning pin hole 1.1.1 is a stepped hole, and the hole diameter near the disc tooth mounting surface side is larger, the passive spiral bevel gear 2 is provided with two passive spiral bevel gear positioning pin holes 2.1 for mounting the other end of the positioning pin 3, the passive spiral bevel gear positioning pin hole 2.1 is a stepped hole, and the hole diameter near the disc tooth mounting surface side is larger, the differential right shell positioning pin hole 1.1.1 and the passive spiral bevel gear positioning pin hole 2.1 have consistent hole diameters, the positioning pin 3 is provided with two and is symmetrically distributed on the same distribution circle, and the positioning pin 3 is in transition fit with the differential right shell positioning pin hole 1.1.1 and the passive spiral bevel gear positioning pin hole 2.1.

[0015] The specific mounting mode of the excavator drive axle passive spiral bevel gear mounting structure is as follows:

[0016] First, the differential assembly 1 is assembled, and the two positioning pins 3 are assembled on the passive spiral bevel gear positioning pin hole 2.1 of the passive spiral bevel gear 2, then the two positioning pins 3 are aligned with the differential right shell positioning pin hole 1.1.1 of the differential right shell 1.1 in the drawing mode, the two positioning pins 3 are assembled in place by using the corresponding assembly tool, and then the passive spiral bevel gear 2 and the differential assembly 1 are fixed by using the connecting bolt 4.

[0017] The excavator drive axle passive spiral bevel gear mounting structure sets the positioning pin mounting hole on the differential shell and the passive spiral bevel gear into a stepped hole, the transition fit between the positioning pin and the positioning pin mounting hole can effectively ensure the installation precision of the passive spiral bevel gear 2 and the differential assembly 1, can avoid the riveting edge phenomenon in the assembly process, can improve the cleanliness of the inner cavity of the drive axle, can improve the service life of the related gear parts, the positioning pin holes on the passive spiral bevel gear 2 and the differential right shell 1.1 are all designed into stepped holes, the risk of the positioning pin 3 falling out in the use process can be effectively prevented, and the service life of the product is improved.

Claims

1. A passive spiral bevel gear mounting structure of excavator drive axle, comprising a differential assembly (1), a differential right casing (1.1), a passive spiral bevel gear (2), a positioning pin (3) and a connecting bolt (4), the connecting bolt (4) connects and fixes the passive spiral bevel gear (2) with the differential assembly (1); the differential right casing (1.1) is provided with two differential right casing positioning pin holes (1.1.1) for installing one end of the positioning pin (3); the passive spiral bevel gear (2) is provided with two passive spiral bevel gear positioning pin holes (2.1) for installing the other end of the positioning pin (3); the differential right casing positioning pin hole (1.1.1) and the passive spiral bevel gear positioning pin hole (2.1) have the same diameter; the positioning pin (3) is provided with two, which are symmetrically distributed on the same distribution circle; characterized in that: The differential right casing positioning pin hole (1.1.1) is a stepped hole, and the hole diameter near the disc tooth mounting surface side is larger; the driven spiral bevel gear positioning pin hole (2.1) is a stepped hole, and the hole diameter near the disc tooth mounting surface side is larger; the positioning pin (3) is in transition fit with the differential right casing positioning pin hole (1.1.1) and the driven spiral bevel gear positioning pin hole (2.1). ​

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