WO2022105844A1

WO2022105844A1 - Locking structure and locking method for axle terminal transmission device of mining dump truck

Info

Publication number: WO2022105844A1
Application number: PCT/CN2021/131588
Authority: WO
Inventors: 张杰山; 乔奎普; 王道明; 秦红义; 司增永; 赵林晓; 杜宁; 姚锡江; 马玉敏
Original assignee: 徐州徐工矿业机械有限公司
Priority date: 2020-11-19
Filing date: 2021-11-19
Publication date: 2022-05-27
Also published as: CN112297712A; CN112297712B

Abstract

A locking structure for an axle terminal transmission device of a mining dump truck. The locking structure comprises an axle shaft sleeve (1), a hub assembly (2), a ring gear (3), a locking assembly and a torsion output assembly (8), wherein an axle shaft spline (1-1) and an external thread (1-2) are sequentially arranged at an end of one side of the axle shaft sleeve (1) from inside to outside, the axle shaft sleeve (1) is connected to the hub assembly (2) by means of a bearing I (10) and a bearing II (11), the hub assembly (2) is connected to a tire rim of the mining dump truck, and the ring gear (3) is arranged and cooperates with the axle shaft spline (1-1) by means of a retainer (9) with an inner spline (9-1); and the locking assembly comprises a locking nut (4), the locking nut (4) comprises an internal thread (4-2), the internal thread (4-2) of the locking nut (4) is engaged with the external thread (1-2) of the axle shaft sleeve (1), and the torsion output assembly (8) is connected to the hub assembly (2). The locking structure is simple and reliable, and is provided with a reliable physical structure for preventing a locking bolt from loosening, the adjusting process does not rely on the experience of an operator, and the process is simple.

Description

Locking structure and locking method of axle terminal transmission device of mining dump truck

technical field

The invention belongs to the technical field of mining dump trucks, and particularly relates to a locking structure and a locking method of an axle terminal transmission device of a mining dump truck.

Background technique

The axle of the mining dump truck is the load-bearing and driving functional device of the vehicle, and the terminal drive is a part of the axle, which is used to install the tires and transmit the driving torque from the transmission system. There are two tapered roller bearings installed on the axle terminal drive. The inner ring of the bearing is a static structure, and the outer ring is connected to the tire and is a rotating structure. The locking structure of the terminal transmission device is required to have a certain range of axial pressure, which is used to lock the tapered roller bearing without locking the rotation of the bearing. And while the vehicle is running, the locking function continues to be effective.

There are two current locking structures:

Structure 1. The large nut is directly locked. The large nut has the feature that the diameter of the thread is close to the diameter of the half-shaft casing. The half-shaft casing has a corresponding external thread. The large nut and the half-shaft casing are directly screwed together, and the inner ring of the bearing is directly locked between the half-shaft casing. superior. Disadvantages: Threadlocking glue is usually required to assist in preventing loosening, and a large locking torque is required, which makes disassembly and assembly inconvenient; due to the large locking torque required, over-tightening is often caused, causing the bearing to fail to rotate normally and damage; the actual During use, once the torque or thread glue fails, because there is no additional anti-loosening structure, the large nut will loosen until it is completely withdrawn.

Structure 2. The perforated flange plate and several small bolts are locked, and the adjusting gasket is added to adjust the axial clearance to achieve the target locking force. It is characterized in that the large nut of structure 1 is disassembled into several small bolts, perforated flanges and adjusting gaskets, the flanges and adjusting gaskets of suitable thickness are in contact with the inner ring of the bearing, and the small bolts are screwed with the half shaft sleeve, Has a locking effect. The advantage is that the small bolts are easy to install, and a locking tab can also be added for additional physical locking of the small bolts. The disadvantage is that the adjusting shims are used to compensate for processing errors, and the thickness of the shims required by different terminal drives is different. It is necessary to obtain the appropriate adjustment thickness according to the experience of the on-site installer, and the locking effect depends on the installation process. Due to the high requirements on human skills, the thickness of the gasket that is accidentally selected is not appropriate, which will cause excessive axial pressure or axial clearance, and damage the bearing during operation.

SUMMARY OF THE INVENTION

In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a locking structure and a locking method for an axle terminal transmission device of a mining dump truck, which has the advantages of simple and reliable locking structure and reliable blocking bolts. Loose physical structure, the adjustment process does not depend on the experience of personnel, and the process is simple.

The present invention is realized by the following technical solutions: a locking structure of an axle terminal transmission device of a mining dump truck, comprising a half shaft sleeve, a wheel hub assembly, a ring gear, a locking assembly and a torsion output assembly, the half shaft One end of the shaft sleeve is sequentially provided with half shaft splines and external threads from the inside to the outside. The tire rims are connected, and the ring gear is mounted and matched with the half shaft splines through a cage with internal splines; the locking assembly includes a locking nut, and the locking nut includes an internal thread, and the locking nut The inner thread of the shaft is matched with the outer thread of the half shaft sleeve, and the torsion output assembly is connected with the wheel hub assembly.

Further, the half-shaft sleeve further includes a spring groove and a half-shaft bump, the half-shaft bump is arranged close to the external thread, and the half-shaft bump is located on the end face of the half-shaft sleeve, and the half-shaft bump is arranged There are multiple, a plurality of the semi-shaft bumps are evenly spaced; the retaining spring grooves are arranged on the outer circumference of the semi-shaft bumps; the locking assembly also includes a locking ring, a wafer and a clamp The circlip is clamped in the circlip groove, the main body of the anti-loosening ring is a ring body, and the ring body is provided with an inner convex block and an outer convex block, the locking nut also includes a nut convex block, the nut convex block The block is arranged on the end face of the locking nut, and the nut protrusions are evenly provided with a plurality of them. After the anti-loosening ring is assembled, the outer protrusions are engaged with the grooves between the nut protrusions and the nut protrusions. Inside, the inner protrusion is clamped in the groove between the half-shaft protrusion and the half-shaft protrusion, and the disc is arranged between the anti-loosening ring and the retaining spring.

Further, four of the half-shaft bumps are evenly arranged, and three of the outer bumps are arranged on the anti-loosening ring.

Further, an annular protrusion is provided on the end surface of the locking ring on the side close to the locking nut.

Further, the circular sheet is a thin plate in a ring state, and one side edge is provided with a chamfer.

Further, the circlip is an open-loop structure.

The present invention also provides a locking method using the locking structure of the axle terminal transmission device of the above-mentioned mining dump truck, comprising: installing the bearing I to the half-shaft sleeve forming assembly, and installing the bearing II and the wheel hub assembly into an assembly , the above two components are then installed together; the ring gear and the cage are installed as the ring gear and the cage assembly, and the ring gear and the cage assembly are installed to the above components;

Screw the lock nut onto the half shaft casing with a fixed torque T1, the threads of the two are tightly combined and have an axial locking force; then rotate the hub assembly with external force, and then tighten the lock nut with the fixed torque T1 , and repeat this step until the lock nut can no longer be rotated with the fixed torque T1, and finally a stable fixed torque T1 is obtained.

Further, assuming that the wheel hub assembly has a negative machining error, install the anti-loosening ring in place, then install the wafer in place, and install the circlip into the circlip groove of the half shaft sleeve to form a complete locking structure. The torque output assembly is in place.

The beneficial effects of the invention are: the locking structure is simple and reliable, the physical structure for preventing the loosening of the locking bolts is reliable, the adjustment process does not depend on the experience of personnel, and the technological process is simple. The adjustment range is wide and can accommodate large processing errors.

Description of drawings

Fig. 1 is the structure exploded diagram of the present invention;

Fig. 2 is the installation assembly diagram of the present invention;

Figure 3 is a partial view of the half shaft sleeve of A in Figure 1;

4 is a schematic structural diagram of the locking assembly of the present invention;

Fig. 5 is the structural schematic diagram of the cage of the present invention;

Fig. 6 is the installation schematic diagram of the locking assembly of B in Fig. 2;

7 is a perspective view of the installation of the locking assembly of the present invention;

Fig. 8 is the partial schematic diagram of C in Fig. 6;

Fig. 9 is another implementation structure in which the locking ring and the wafer are matched according to the present invention;

In the figure, 1, half shaft sleeve, 1-1, half shaft spline, 1-2, external thread, 1-3, circlip groove, 1-4, half shaft projection, 2, hub assembly, 3, Ring gear, 4, Lock nut, 4-1, Nut bump, 4-2, Internal thread, 5, Lock ring, 5-1, External bump, 5-2, Internal bump, 5-3, Annular protrusion, 6, disc, 7, circlip, 8, torsion output assembly, 9, cage, 9-1, internal spline, 10, bearing I, 11, bearing II.

Detailed ways

The present invention will be further described below according to the accompanying drawings and embodiments.

As shown in Figures 1 to 8, a locking structure of an axle terminal transmission device of a mining dump truck includes an axle sleeve 1, a wheel hub assembly 2, a gear ring 3, a locking assembly and a torsion output assembly 8, One end of the half shaft sleeve 1 is sequentially provided with a half shaft spline 1-1 and an external thread 1-2 from the inside to the outside. The half shaft sleeve 1 is connected to the hub through bearings I10 and II11. The assembly 2 is connected, the outer ring of bearing I10 and the outer ring of bearing II11 and the hub assembly 2 can freely rotate around the half shaft sleeve 1, and the hub assembly 2 is connected with the tire rim of the mining dump truck for bearing. The ring gear 3 is mounted and matched with the half-shaft splines 1-1 through the cage 9 with the internal splines 9-1; the locking assembly is located at the end of the half-shaft sleeve 1 for locking the bearing I10 , Bearing II11, ring gear 3, cage 9 and hub assembly 2. The locking assembly includes a locking nut 4, the locking nut 4 includes an inner thread 4-2, and the inner thread 4-2 of the locking nut 4 is in line with the outer thread 1-2 of the half shaft sleeve 1. In cooperation, the torsion output assembly 8 is connected with the wheel hub assembly 2 .

The hub assembly 2 also has a negative machining error. For this reason, as shown in FIGS. 1 to 8 , the half-shaft sleeve 1 further includes a retaining ring groove 1-3 and a half-shaft protrusion 1-4. The half-shaft bumps 1-4 are arranged close to the external thread 1-2, and the half-shaft bumps 1-4 are located on the end surface of the half-shaft sleeve 1. There are four half-shaft bumps 1-4, and the four The half-shaft bumps 1-4 are evenly spaced, and grooves are formed between two of the half-shaft bumps 1-4. The circlip grooves 1-3 are provided on the outer circumference of the half-shaft protrusions 1-4; the locking assembly further includes a locking ring 5, a disc 6 and a circlip 7, the circlip 7 It is clamped in the circlip grooves 1-3, the circlip 7 is an open-loop structure, and the circlip 7 can be disassembled and assembled with a circlip pliers. The main body of the anti-loosening ring 5 is a ring body, and the ring body is provided with inner bumps 5-2 and outer bumps 5-1, and there are a plurality of outer bumps 5-1. One is provided on the inner bump 5-2. The locking nut 4 further includes nut projections 4-1, which are arranged on the end face of the locking nut 4, and a plurality of nut projections 4-1 are evenly arranged. A groove is formed between -1. After the anti-loose ring 5 is assembled, the outer bump 5-1 is engaged in the groove between the nut bump 4-1 and the nut bump 4-1, and the inner bump 5 -2 is engaged in the groove between the half-shaft bumps 1-4 and the half-shaft bumps 1-4, and the disc 6 is arranged on the anti-loosening ring 5 and the retaining ring 7 between. The retaining ring 7 is used to prevent the locking ring 5 and the disc 6 from slipping out of the half shaft sleeve 1 .

As shown in FIG. 8 , an annular protrusion 5-3 is provided on the end surface of the locking ring 5 on the side close to the locking nut 4 . In another embodiment, as shown in FIG. 9 , an annular protrusion 5-3 is provided on the end surface of the locking ring 5 on the side away from the locking nut 4 . Ensure that the lock nut 4 is in the axial direction regardless of the normal tolerance (the position of the nut 4 is to the left after installation, and the lock ring 5 adopts the structure shown in Figure 8) or the negative tolerance (the position of the nut 4 is to the right after installation, and the lock ring 5 Adopting the structure shown in FIG. 9 ), normal locking can be achieved by the unilateral outer bump 5-1 of the anti-loosening ring 5 being installed to the left and to the right. The original sheet 6 is provided with a one-sided chamfer, so that it will not interfere with the inner rounded corner of the anti-loosening ring 5 when the outer bump 5-1 is installed to the right.

The present invention also provides a locking method using the locking structure of the axle terminal transmission device of the above-mentioned mining dump truck, comprising: installing the bearing I10 to the half-shaft sleeve 1 to form the assembly, and installing the bearing II11 and the wheel hub assembly 2 into an assembly, the above two assemblies are then installed together; the ring gear 3 and the cage 9 are installed as a ring gear and a cage assembly, and the ring gear and the cage assembly are then installed into the above assemblies;

Screw the lock nut 4 to the half shaft sleeve 1 with a fixed torque T1, the threads of the two are tightly combined and have an axial locking force (the lock nut 4 has a certain axial locking torque for pressing Ring gear 3, cage/9, bearing I10, hub assembly 2 and bearing II11); then rotate the hub assembly 2 with external force, then tighten the lock nut 4 with the fixed torque T1, and repeat this step until the fixed torque T1 The lock nut 4 can no longer be rotated, resulting in a stable fixed torque T1.

As an improvement of this embodiment, assuming that the hub assembly 2 has a negative machining error, install the anti-loosening ring 5 in place, then install the wafer 6 in place, and install the circlip 7 into the circlip groove 1- 3, form a complete locking structure, and finally install the torque output assembly 8 in place.

Claims

A locking structure for an axle terminal transmission device of a mining dump truck, characterized in that it comprises an axle sleeve (1), a wheel hub assembly (2), a ring gear (3), a locking assembly and a torsion output assembly ( 8), one end of the half shaft sleeve (1) is sequentially provided with a half shaft spline (1-1) and an external thread (1-2) from the inside to the outside, the half shaft sleeve (1) ) is connected with the wheel hub assembly (2) through the bearing I (10) and the bearing II (11), the wheel hub assembly (2) is connected with the tire rim of the mining dump truck, and the ring gear (3) is connected with the inner flower The retainer (9) of the key (9-1) is installed and matched with the half shaft spline (1-1); the locking assembly includes a locking nut (4), and the locking nut (4) includes The inner thread (4-2), the inner thread (4-2) of the locking nut (4) is matched with the outer thread (1-2) of the half shaft sleeve (1), and the torsion output assembly (8) ) is connected to the hub assembly (2).
The locking structure of the axle terminal transmission device of a mining dump truck according to claim 1, wherein the half shaft sleeve (1) further comprises a retaining ring groove (1-3) and a half shaft convex block (1-4), the half-shaft protrusion (1-4) is arranged close to the external thread (1-2), and the half-shaft protrusion (1-4) is located on the end face of the half-shaft sleeve (1), and the half-shaft A plurality of axle projections (1-4) are provided, and the plurality of semi-axle projections (1-4) are arranged at even intervals; -4) on the outer circumference; the locking assembly further includes a locking ring (5), a disc (6) and a circlip (7), the circlip (7) is clamped in the circlip groove (1) In -3), the main body of the anti-loosening ring (5) is a ring body, and the ring body is provided with inner bumps (5-2) and outer bumps (5-1), and the locking nut (4) is also It includes a nut projection (4-1), the nut projection (4-1) is arranged on the end face of the locking nut (4), and a plurality of nut projections (4-1) are evenly arranged, and the anti-loosening ring (5) ) After assembly, the outer bump (5-1) is engaged in the groove between the nut bump (4-1) and the nut bump (4-1), and the inner bump (4-1) (5-2) is engaged in the groove between the half-shaft protrusion (1-4) and the half-shaft protrusion (1-4), and the disc (6) is provided on the between the loose ring (5) and the retaining spring (7).
The locking structure of the axle terminal transmission device of a mining dump truck according to claim 2, characterized in that, four of the half-shaft bumps (1-4) are evenly arranged, and the anti-loosening ring (5) Three of the outer bumps (5-1) are provided.
The locking structure of the axle terminal transmission device of a mining dump truck according to claim 2, characterized in that, the end surface of the anti-loosening ring (5) close to the side of the locking nut (4) is provided with Annular protrusions (5-3).
The locking structure of the axle terminal transmission device of a mining dump truck according to claim 2, characterized in that, the disc (6) is a thin plate in a ring state, and one side edge is provided with a chamfer.
The locking structure of the axle terminal transmission device of a mining dump truck according to claim 2, wherein the retaining spring (7) is an open-loop structure.
A locking method using the locking structure of the axle terminal transmission device of a mining dump truck according to claim 2, characterized in that, comprising: installing the bearing I (10) to the half shaft sleeve (1) to form a Assembly, the bearing II (11) and the hub assembly (2) are installed into an assembly, and the above two assemblies are then installed together; the ring gear (3) and the cage (9) are installed as the ring gear and cage assembly, the ring gear and the retainer The rack assembly is then installed to the above assembly;

Screw the lock nut (4) onto the half shaft sleeve (1) with a fixed torque T1, the threads of the two are tightly combined and have an axial locking force; then rotate the hub assembly (2) with external force, and then Tighten the lock nut (4) with the fixed torque T1, repeat this step until the lock nut (4) can no longer be rotated with the fixed torque T1, and finally obtain a stable fixed torque T1.
The method for locking the locking structure of the axle terminal drive of a mining dump truck according to claim 7, characterized in that, assuming that the wheel hub assembly (2) has a negative machining error, the locking ring (5) Install the disc (6) in place, install the circlip (7) into the circlip groove (1-3) of the half shaft sleeve (1) to form a complete locking structure, and finally install the torque output assembly (8) Install in place.