Pre-tightening force adjusting structure for wheel-side bearing of loading machine

Abstract

The utility model discloses a pre-tightening force adjusting structure for a wheel-side bearing of a loading machine. The pre-tightening force adjusting structure comprises a wheel hub, a locking gasket, a supporting shaft, a round nut and a bearing, the hub is mounted on a supporting shaft serving as a fixing piece through a bearing; the round nut is installed at the end of the supporting shaft and tightly attached to the outer end face of the bearing. The round nut is provided with four threaded holes and two through holes. The locking gasket is locked on the round nut through a bolt, 24 bolt holes are formed in the locking gasket, and a locking boss is arranged on the inner circular ring wall of the locking gasket. The device is simple and compact in structure, convenient and efficient to assemble and maintain, long in service life, high in safety coefficient and capable of obviously reducing the failure rate.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel side reducers for loader drive axles, in particular to a preload force adjustment structure for wheel side bearings of loader machines. Background Art

[0002] A common structure of the existing wheel-side reducer of the loader drive axle is: its bearing preload adjustment structure is locked by two round nuts, a stop washer is provided in the middle of the two round nuts, the inner circle of the stop washer is provided with a boss, the boss is embedded in the rectangular groove of the support shaft during assembly, the end face of the stop washer is provided with a pin hole, during assembly, a fixed pin with a diameter of Φ5 is inserted into the pin hole of the stop washer and abuts against the pin hole of the round nut on the end face of the internal gear, and a threaded fastener is used to prevent loosening when the other round nut is locked. The bearing preload adjustment structure has the following disadvantages: first, due to the compact structure of the wheel-side reducer, the outer circle size of the round nut is limited when designing, and the original design is an outer octagonal structure, which requires special tooling during assembly and disassembly, and is inconvenient to maintain; second, the structure needs to install a fixed pin with a diameter of Φ5, because its parts are small, not only is it inconvenient to assemble, but the drive axle is also prone to failure due to its insufficient shear resistance. Summary of the invention

[0003] The purpose of the utility model is to solve the above defects and provide a loader wheel bearing preload adjustment structure with simple and compact structure, convenient and efficient assembly and maintenance, and long service life, so as to solve the following two problems: First, due to the compact structure of the wheel reducer, the outer circle size of the round nut is limited when designing, and the original design is an outer octagonal structure, which requires special tooling during assembly and disassembly, and is inconvenient for maintenance; second, the structure needs to install a fixing pin with a diameter of Φ5, which is not only inconvenient to assemble due to its small parts, but also the drive axle is prone to failure due to its insufficient shear resistance. Finally, the reliability of the drive axle is improved.

[0004] To achieve the above purpose, the utility model loader wheel side bearing preload adjustment structure includes a wheel hub 1, a stop washer 3, a support shaft 4, a round nut 5 and a bearing 6; the wheel hub 1 is installed on the support shaft 4 as a fixing member through the bearing 6; the round nut 5 is installed at the end of the support shaft 4 and close to the outer end surface of the bearing 6, and the round nut 5 is provided with 4 threaded holes 9 and 2 through holes 10; the stop washer 3 is locked on the round nut 5 by a bolt 2, and the stop washer 3 is provided with 24 bolt holes 8, and a stop boss 7 is provided on the inner annular wall of the stop washer 3.

[0005] The utility model loader wheel bearing preload adjustment structure has the following beneficial effects by redesigning the round nut and the stop washer structure, setting 4 threaded holes and 2 through holes on the round nut, and setting the stop washer with a stop boss and 24 bolt holes:

[0006] 1. When adjusting the bearing preload, you only need to use a screw to knock the two through holes of the round nut. The assembly can be disassembled and assembled without special tooling. When locking after the preload is adjusted, align the stop boss with the support shaft limit groove, and use bolts to lock the stop gasket to the round nut. The assembly and maintenance operations are convenient and efficient.

[0007] 2. The stop gasket and locking bolt have strong shear resistance and high safety factor, which can significantly reduce the failure rate;

[0008] 3. The structure is simple and compact, the production cost is low, the quality is reliable and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The utility model is a main sectional structural schematic diagram of a wheel side bearing preload adjustment structure of a loader.

[0010] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the stop gasket.

[0011] Figure 3 yes Figure 1 Schematic diagram of the enlarged structure of the medium round nut.

[0012] Reference numerals: wheel hub 1 , bolt 2 , stop washer 3 , support shaft 4 , round nut 5 , bearing 6 , stop boss 7 , bolt hole 8 , threaded hole 9 , through hole 10 . DETAILED DESCRIPTION

[0013] The specific implementation of the loader wheel side bearing preload force adjustment structure of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0014] Figure 1-Figure 3 As shown, the utility model loader wheel side bearing preload adjustment structure comprises a wheel hub 1, a stop washer 3, a support shaft 4, a round nut 5 and a bearing 6; the wheel hub 1 is mounted on the support shaft 4 as a fixing member through the bearing 6; the round nut 5 is mounted on the end of the support shaft 4 and is close to the outer end surface of the bearing 6, and the round nut 5 is provided with 4 threaded holes 9 and 2 through holes 10; the stop washer 3 is locked on the round nut 5 by a bolt 2, and the stop washer 3 is provided with 24 bolt holes 8, and a stop boss 7 is provided on the inner annular wall of the stop washer 3.

[0015] The utility model discloses a wheel bearing preload adjustment structure for a loader, wherein the round nut and the stop washer structure are redesigned; the round nut is provided with four threaded holes and two through holes; the stop washer is provided with a stop boss and 24 bolt holes; when adjusting the preload of the bearing, the two through holes of the round nut can be knocked with a screw to assemble the nut; no special tooling is required; after the preload is adjusted, the stop washer can be locked onto the round nut with a bolt; assembly and maintenance are convenient and efficient, the safety factor is high, and the failure rate is greatly reduced.

Claims

1. A loader wheel bearing preload adjustment structure, comprising a wheel hub (1), a stop washer (3), a support shaft (4), a round nut (5) and a bearing (6); the wheel hub (1) is mounted on the support shaft (4) as a fixed member through the bearing (6); the round nut (5) is mounted on the end of the support shaft (4) and is in close contact with the outer end surface of the bearing (6); the characteristics are: The round nut (5) is provided with four threaded holes (9) and two through holes (10); the stop washer (3) is locked on the round nut (5) by means of bolts (2); the stop washer (3) is provided with 24 bolt holes (8); and a stop boss (7) is provided on the inner annular wall of the stop washer (3).

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