CN212131038U

CN212131038U - Heavy truck drive axle differential nut locking device

Info

Publication number: CN212131038U
Application number: CN201922403124.5U
Authority: CN
Inventors: 邱阳; 古振峰; 刘海柱; 王理然; 郭瑞; 李立军; 高云江
Original assignee: Beiben Trucks Group Co Ltd
Current assignee: Beiben Trucks Group Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-12-11
Anticipated expiration: 2029-12-27

Abstract

The utility model provides a heavy truck transaxle differential mechanism nut locking means belongs to heavy truck transaxle technical field, through designing a special-shaped locking plate, realizes the reliable locking of lock nut of differential mechanism both ends bearing. The locking device comprises a locking plate, and the structure of the locking plate is specifically defined as follows: the locking plate is provided with a central hole, and three teeth are arranged on the locking plate along the periphery of the central hole in a circumferential and asymmetrical manner; the locking reliability of the bearing locking nuts at the two ends of the differential is improved, and effective looseness prevention is realized.

Description

Heavy truck drive axle differential nut locking device

Technical Field

The utility model belongs to the technical field of heavy truck transaxle, a nut locking means is related to.

Background

In a typical automobile structure, a drive axle includes an axle housing, a final drive, a differential, a transmission for driving wheels, and the like.

The differential is used as one of the core components of the drive axle and consists of a differential case, a cross shaft, a bevel gear planetary gear train and other parts, and when the automobile runs on an uneven road or turns, the differential realizes the rotation speed difference of tires and prevents the excessive abrasion of rigid connection to the tires. The differential shell comprises two half shells which are connected into a whole through bolts, and the functions of transmitting torque and supporting a bevel gear planetary gear train in the differential shell are realized.

SUMMERY OF THE UTILITY MODEL

The utility model provides a heavy truck transaxle differential mechanism nut locking means through designing a special-shaped locking plate, realizes the reliable locking of lock nut of differential mechanism both ends bearing.

The technical scheme of the utility model is that: the utility model provides a heavy truck transaxle differential mechanism nut locking means which characterized in that, includes a locking plate, and the concrete definition of locking plate structure is: the locking plate is provided with a central hole, and three teeth are arranged on the locking plate along the periphery of the central hole in a circumferential and asymmetrical manner; both sides of each tooth are provided with a section of circular arc, and the shape of the circular arc is consistent with the shape of the periphery of the bulge on the locking nut; the circular arcs among the three teeth form radial bulges; the symmetry axes of the three teeth of the lock plate are respectively expressed as a first axis, a second axis and a third axis; the locking plate has three first radiuses, second radiuses, third radiuses of crossing the circular shape of centre bore respectively: the left radius in the horizontal direction rotates anticlockwise by 30 degrees to form a first radius, the left radius in the horizontal direction rotates clockwise by 30 degrees to form a second radius, the left radius in the horizontal direction vertically downwards forms a third radius, and the linear directions of the three radii have specific relations with the first axis, the second axis and the third axis; the first axis is superposed with the first radius, and the second axis is parallel to the second radius and is deviated to the left and the bottom by a certain distance; the third axis is parallel to the third radius and offset a distance to the left.

Further, when the locking plate rotates 120 degrees clockwise, the second shaft is located at the upper left of the original position of the first shaft, and is parallel to the first shaft and has a certain offset distance.

Further, when the locking plate rotates clockwise by 240 degrees, the third shaft is positioned at the lower right of the original position of the first shaft, and is parallel to the first shaft and has a certain offset distance.

Furthermore, the locking plate is fixed on the reducer shell through a hexagon bolt, one tooth of the three teeth on the locking plate is located in a radial groove between two axial protrusions of the lock nut, and the radial protrusion between the teeth on the locking plate is located on the periphery of one axial protrusion of the lock nut.

Further, the distance from the end parts of the three teeth to the center of the center hole of the lock plate is the same.

Further, the depth of the teeth is the same as the depth of the radial groove of the lock nut.

Further, the depth of the radial projection of the tooth is comparable to the axial arc length of the axial projection of the lock nut.

The technical effects of the utility model are that: the locking reliability of the bearing locking nuts at the two ends of the differential is improved, and effective looseness prevention is realized.

6 kinds of locking positions are selectable, compared with a double-nut locking mode (as shown in figure 5) of a traditional structure, the double-nut locking mechanism is simpler, the number of parts is reduced, and the product cost is saved.

Drawings

Fig. 1 is a schematic structural view of a locking tooth of the locking plate;

FIG. 2 is a schematic illustration of lock nut locking for bearings at both ends of the differential.

FIG. 3 is a schematic front view of a lock nut lock for bearings at both ends of the differential;

FIG. 4 is a schematic view of the selection of appropriate teeth on the locking plate 1 to be tightened by the hex bolt 2;

fig. 5 is a schematic diagram of a double nut locking mode of a conventional structure

1. A locking plate; 2. a hexagon bolt; 3. locking the nut; 4. a bearing; 5. a differential case; 6. speed reducer shell

Detailed Description

The utility model discloses a heavily block transaxle differential mechanism nut locking means, through the position and the angle (like figure 1) of 6 locking teeth (11, 12, 13, 14, 15, 16) of rational design locking plate, realize lock nut's reliable locking.

The utility model discloses a heavily block transaxle differential mechanism nut locking means, including a locking plate 1, the locking plate passes through hex bolts 2 to be fixed on speed reducer shell 6, realizes the reliable locking of lock nut 3, guarantees bearing 4 and differential mechanism shell 5's axial assembly size (as figure 2, figure 3).

The locking plate is fixed on the reducer shell through a hexagon bolt, one tooth of three teeth on the locking plate is located between two axial protrusions of the locking nut 3 to limit the rotation of the locking nut, and the radial protrusion between the teeth on the locking plate is located on the periphery of one axial protrusion of the locking nut 3.

Meanwhile, three teeth (11, 13 and 15) on the locking plate are optionally installed, after the locking nut 3 is screwed down, the proper teeth on the locking plate 1 are selected to be screwed down through the hexagon bolt 2 (as shown in figure 4), and meanwhile, the positions of the

teeth

12, 14 and 16 can prevent the locking plate 1 from loosening, so that looseness prevention is realized.

A locking plate 1 is defined in particular by: the locking piece is provided with three teeth (11, 13, 15) which are arranged asymmetrically in the circumferential direction; both sides of each tooth are provided with a section of circular arc, and the shape of the circular arc is consistent with that of the convex excircle at the corresponding position on the locking nut 3;

the principle of the utility model is that:

after the locking nut 3 is installed in the adjusted bearing clearance, the tooth on the locking plate 1 is selected to be matched with the radial groove between the axial protrusions on the locking nut 3, and the function of preventing the locking nut 3 from loosening is achieved.

The locking range of the locking plate is expanded and the fine adjustment range of the locking nut is reduced by the fact that the locking plate 1 is provided with the central hole and three teeth are arranged in an asymmetrical mode in the circumferential direction along the periphery of the central hole (the three teeth are located in asymmetrical positions in the circumferential direction respectively); therefore, the variation amplitude of the bearing clearance is reduced, and the matching precision of the system is higher.

Both sides of each tooth are provided with an end arc, and the shape of the arc is consistent with that of the convex excircle at the corresponding position on the locking nut 3. The arcs between the three teeth naturally form radial bulges (the teeth 12, the teeth 14 and the teeth 16) respectively.

The axes of the three teeth are expressed as a first axis (an axis corresponding to the tooth 15), a second axis (an axis corresponding to the tooth 11), a third axis (an axis corresponding to the tooth 13), the radius (namely the radius) passing through the center of the central circular hole on the lock plate 1 is respectively selected from three directions (a first radius direction of 30 degrees anticlockwise rotation of the radius in the horizontal direction), 150 degrees clockwise rotation of the radius in the horizontal direction by 30 degrees and 270 degrees clockwise rotation of the radius in the horizontal direction by 30 degrees (a second radius direction clockwise rotation of the radius in the horizontal direction by 30 degrees) and a third radius direction (a vertical downward third radius direction), and the specific relations of the radii in the three directions with the first axis, the second axis; the first axis is coincided with the radius of 30 degrees, and the second axis is parallel to the radius of 150 degrees and is deviated to the left and the bottom by a certain distance; the third axis is parallel to the 270 degree radius and is offset a distance to the left.

When the locking plate 1 rotates 120 degrees clockwise, the second shaft is positioned at the upper left of the original position of the first shaft, and is parallel to the first shaft and has a certain offset distance. When the locking plate 1 rotates clockwise by 240 degrees, the third shaft is positioned at the lower right of the original position of the first shaft, and is parallel to the first shaft and has a certain offset distance.

Claims

1. The utility model provides a heavy truck transaxle differential mechanism nut locking means which characterized in that, includes a locking plate, and the concrete definition of locking plate structure is: the locking plate is provided with a central hole, and three teeth are arranged on the locking plate along the periphery of the central hole in a circumferential and asymmetrical manner; both sides of each tooth are provided with a section of circular arc, and the shape of the circular arc is consistent with the shape of the periphery of the bulge on the locking nut; the circular arcs among the three teeth form radial bulges;

the symmetry axes of the three teeth of the lock plate are respectively expressed as a first axis, a second axis and a third axis; the locking plate has three first radiuses, second radiuses, third radiuses of crossing the circular shape of centre bore respectively: the left radius in the horizontal direction rotates anticlockwise by 30 degrees to form a first radius, the left radius in the horizontal direction rotates clockwise by 30 degrees to form a second radius, the left radius in the horizontal direction vertically downwards forms a third radius, and the linear directions of the three radii have specific relations with the first axis, the second axis and the third axis; the first axis is superposed with the first radius, and the second axis is parallel to the second radius, is deviated to the left and the lower and has a deviated distance; the third axis is parallel to the third radius and offset to the left, and has an offset distance.

2. The heavy truck transaxle differential nut locking apparatus of claim 1 wherein the second axis is parallel and offset to the left of the home position of the first axis when the locking plate is rotated 120 degrees clockwise.

3. The heavy truck transaxle differential nut locking apparatus of claim 1 wherein the third axis is parallel and offset to the right below the home position of the first axis when the locking plate is rotated 240 degrees clockwise.

4. The differential nut locking apparatus of a heavy truck transaxle of claim 1 wherein the locking plate is fixed to the reducer case by a hex bolt, one of the three teeth of the locking plate is located in a radial groove between two axial protrusions of the lock nut, and the radial protrusion between the teeth of the locking plate is located on an outer circumference of one axial protrusion of the lock nut.

5. The heavy truck transaxle differential nut locking apparatus of claim 1 wherein the ends of the three teeth are equidistant from the center of the locking plate's central opening.

6. The heavy truck transaxle differential nut locking apparatus of claim 1 wherein the teeth have a depth that is the same as the depth of the radial grooves of the lock nut.

7. The heavy truck transaxle differential nut locking apparatus of claim 1 wherein the teeth have radial projections with a depth corresponding to the axial arc length of the axial projections of the lock nut.