Fixing structure for axle of drive axle of loader-digger

Abstract

The utility model discloses an axle fixing structure of a drive axle of a backhoe loader. The axle fixing structure comprises a wheel carrier, an axle and a screwed plug, the wheel shaft is assembled in the wheel shaft hole of the wheel carrier in an interference fit manner; a wheel shaft pin hole is formed in the surface of the wheel shaft, a radial threaded hole used for installing a screwed plug is formed in the wheel shaft hole of the wheel carrier and corresponds to the wheel shaft pin hole, and the screwed plug is installed in the radial threaded hole and the wheel shaft pin hole so that the wheel carrier can circumferentially limit and fix the wheel shaft. Friction force generated by interference fit of the wheel shaft and the wheel carrier and anti-shearing force limited and fixed by the screwed plug act together to effectively prevent the wheel shaft from loosening. The wheel axle is simple and compact in structure, convenient and efficient to assemble and long in service life, and solves the problem that the wheel axle in the prior art is easy to loosen and abrade when a heavy load working condition or part machining size is unstable only depending on interference fit.

Description

Technical Field

[0001] The utility model relates to the technical field of a driving axle assembly of an excavator loader, in particular to a wheel axle fixing structure of a driving axle of an excavator loader. Background Art

[0002] Existing backhoe loader drive axle wheel axle fixing generally adopts interference fit fixing structure. This structure has the following disadvantages: when the wheel axle only relies on the interference fit fixing structure, the friction force of the interference fit between the wheel axle and the wheel frame is less than the force of the wheel axle in actual working conditions, which easily causes the wheel axle to loosen and cause wear, greatly reducing the reliability and service life of the backhoe loader drive axle. Summary of the invention

[0003] The purpose of the utility model is to solve the above defects and provide a wheel axle fixing structure for an excavator loader drive axle which has a simple and compact structure, is convenient and efficient to assemble, and has a long service life, thereby solving the problem that the wheel axle in the prior art is easily loosened and worn when encountering heavy load conditions or when the processing size of parts is unstable and the wheel axle only relies on interference fit.

[0004] To achieve the above purpose, the wheel axle fixing structure of the driving axle of the excavator loader of the utility model includes a wheel frame 1, an axle 2 and a screw plug 3; the axle 2 is assembled in the wheel axle hole of the wheel frame 1 by interference fit; a wheel axle pin hole 4 is provided on the surface of the wheel axle 2, and a radial threaded hole for installing the screw plug 3 is also provided in the wheel axle hole of the wheel frame 1 corresponding to the wheel axle pin hole 4, and the screw plug 3 is installed in the radial threaded hole and the axle pin hole 4 to realize the circumferential limiting fixation of the wheel frame 1 to the wheel axle 2, so that the friction force generated by the interference fit between the wheel axle 2 and the wheel frame 1 and the anti-shear force of the limiting fixation of the screw plug 3 work together to effectively prevent the wheel axle 2 from loosening.

[0005] The utility model of the wheel axle fixing structure of the driving axle of the excavator loader has the following technical characteristics and beneficial effects: by adding a pin hole on the outer circle of the wheel axle and a threaded hole on the wheel frame, the wheel frame and the wheel axle are fixed by a screw plug during assembly.

[0006] 1. Add a pin hole on the outer circle of the wheel axle, add a threaded hole at the position corresponding to the wheel frame and the pin hole, and use a screw plug to fix the wheel frame and the wheel axle during assembly, so that the friction generated by the interference fit between the wheel axle 2 and the wheel frame 1 and the anti-shear force of the screw plug 3 limit the position and fix it together, effectively preventing the loosening and wear of the wheel axle 2, greatly improving the load-bearing capacity of the wheel axle and improving the reliability of the drive axle of the excavator loader;

[0007] 2. The structure is simple and compact, easy to assemble and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1The utility model is a schematic diagram of the main cross-sectional structure of the wheel shaft fixing structure of the driving bridge of the excavator loader.

[0009] Reference numerals: wheel frame 1, wheel axle 2, screw plug 3, wheel axle pin hole 4. DETAILED DESCRIPTION

[0010] The specific implementation of the drive axle wheel shaft fixing structure of the excavator loader of the utility model is further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 As shown, the wheel axle fixing structure of the driving bridge of the excavator loader of the utility model comprises a wheel frame 1, a wheel axle 2 and a screw plug 3; the wheel axle 2 is assembled in the wheel axle hole of the wheel frame 1 by interference fit; a wheel axle pin hole 4 is provided on the surface of the wheel axle 2, and a radial threaded hole for installing the screw plug 3 is also provided in the wheel axle hole of the wheel frame 1 corresponding to the wheel axle pin hole 4, and the screw plug 3 is installed in the radial threaded hole and the wheel axle pin hole 4 to realize the circumferential limiting fixation of the wheel frame 1 to the wheel axle 2, so that the friction force generated by the interference fit between the wheel axle 2 and the wheel frame 1 and the anti-shear force of the limiting fixation of the screw plug 3 work together to effectively prevent the wheel axle 2 from loosening.

[0012] The wheel axle fixing structure of the driving axle of the excavator loader mentioned above adds a pin hole on the outer circle of the wheel axle, and adds a threaded hole at the position corresponding to the wheel frame and the pin hole. During assembly, a screw plug is used to fix and limit the wheel frame and the wheel axle, so that the friction force generated by the interference fit between the wheel axle 2 and the wheel frame 1 and the anti-shear force of the screw plug 3 to limit and fix the wheel axle 2 effectively prevent the wheel axle 2 from loosening and wearing, greatly improves the load-bearing capacity of the wheel axle, and improves the reliability of the driving axle of the excavator loader; solves the problem that the wheel axle of the prior art is prone to loosening and wearing when encountering heavy load conditions or the processing size of the parts is unstable because it only relies on interference fit.

Claims

1. A wheel axle fixing structure for a driving axle of an excavator loader, comprising a wheel frame (1) and a wheel axle (2); the wheel axle (2) is assembled in the wheel axle hole of the wheel frame (1) by interference fit; and the characteristics are: It also includes a screw plug (3); a wheel axle pin hole (4) is provided on the surface of the wheel axle (2); a radial threaded hole for installing the screw plug (3) is also provided in the wheel axle hole of the wheel frame (1) and corresponds to the wheel axle pin hole (4); the screw plug (3) is installed in the radial threaded hole and the wheel axle pin hole (4) to achieve circumferential positioning and fixing of the wheel axle (2) by the wheel frame (1), so that the friction force generated by the interference fit between the wheel axle (2) and the wheel frame (1) and the shear resistance force of the screw plug (3) for positioning and fixing work together to effectively prevent the wheel axle (2) from loosening.

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