CN209035921U - Bearing for motor car wheel pair moves back handler - Google Patents

Abstract

A bearing extraction device used for a moving wheel set relates to the field of bearing extraction devices composed of a bearing axle box of a low-floor moving wheel pair of a rail vehicle, and solves the problem that the pull plate of the existing bearing extraction device is an integral type, which is large in size and cannot be installed The rear side of the wheel-set axle box cover, and the bearing of the low-floor moving wheel-to-bearing axle box cannot be withdrawn, etc., including the guide sleeve, the hollow plunger hydraulic cylinder, the clamp, the tailgate, the four pulling claws and the Five threaded rods; the guide sleeve is fixed to the axle end of the moving wheel by bolts, and the four pulling claws are fixed between the rear cover of the axle box and the wheel hub through a clamp, and the clamp is fixed on the outside of the four pulling claw. One end of the rod is connected with four pulling claws, and the other end is fixed with the rear baffle through a nut. Adjust the nut to make the rear baffle fit tightly with the hollow plunger hydraulic cylinder, and one end of a threaded rod is connected to the guide sleeve through a thread , and the other end passes through the hollow plunger hydraulic cylinder and the tailgate in turn. The novel structure is simple and practical, and the operation is convenient.

Description

Bearing extraction device for moving wheel sets

technical field

The utility model relates to the field of bearing removal devices composed of bearing axle boxes of low-floor moving wheel pairs of rail vehicles, in particular to a bearing removal device used for moving wheel pairs.

Background technique

Domestic rail vehicle bogie wheelset bearing axle box is generally composed of axle box front cover 1-1, bearing pressure plate 1-2, bearing 1-3, dust retaining ring 1-4 and axle box rear cover 1-5. . As shown in Figure 1, when there is a quality problem in the composition of the wheelset bearing axle box, the bearing axle box needs to be disassembled and repaired. First, the axle box front cover 1-1, the bearing pressure plate 1-2, and the axle box body 1-3 wheelset The components of the bearing axle box are disassembled with tools such as wrenches, and then the bearings 1-3 and the dust retaining ring 1-4 are removed from the axle journal through the bearing removal device. The dust retaining ring composed of this type of axle box has a large distance from the end face of the wheel hub, and can adopt the structural form of an integral pull plate.

Existing Bearing Removal Device, including Nut 2-1, Tailgate 2-2, Threaded Rod 2-3, Hollow Plunger Hydraulic Cylinder 2-4, Pull Plate 2-5, Shaft End Bolt 2-6 and Guide Sets 2-7. As shown in Fig. 2, the existing bearing removal device is assembled as shown in Fig. 3. By adjusting the nut 2-1, the rear baffle 2-2 and the pull plate 2-5 are ensured to be parallel to prevent the When the bearing is withdrawn, the force is uneven and the journal is scratched. Most of the common subway wheelset bearing axle box components have a large distance from the wheel hub, and the bearing can be removed in the way shown in Figure 3.

As shown in Figure 4, the low-floor moving wheel-to-axle box device consists of the axle box front cover 3-1, the bearing pressure plate 3-2, the bearing 3-3, the axle box body 3-4, the dust retaining ring 3-5, the axle box The back cover of the box is assembled by 3-6. As shown in Figure 4, when there is a quality problem in the composition of the wheelset bearing axle box, the bearing axle box needs to be disassembled and repaired. First, the axle box front cover 3-1, bearing pressure plate 3-2, and axle box body 3-4 wheelset From the bearing axle box composition, use a wrench and other tools to disassemble, and then use the bearing removal device to remove the bearing 3-3 and the dust retaining ring 3-4 from the axle journal. The structure of this type of axle box is similar to that of the bearing axle box of domestic rail vehicles, but the distance between the dust retaining ring and the end face of the wheel hub is small, and the dimensions of the axle box and axle are much smaller than those of ordinary vehicles, resulting in the bearing rear cover and The size of the space between the wheel hub holes is very small, and the existing bearing withdrawal device cannot meet the bearing withdrawal of this type of wheel-set axle box device.

Based on the above technical analysis, the present invention provides a bearing withdrawing device for a low-floor moving wheel to a bearing axle box, through which the bearing consisting of a low-floor moving wheel and a bearing axle box can be withdrawn.

Utility model content

In order to solve the problem that the pull plate of the existing bearing withdrawal device is integral, the size of the utility model is large, the rear side of the wheelset axle box cover cannot be installed, and the bearing withdrawal of the low-floor moving wheel to the bearing axle box cannot be performed, etc. The problem is to provide a bearing extraction device for a moving wheel set.

Bearing removal device for moving wheel set, including guide sleeve, hollow plunger hydraulic cylinder, clamp, tailgate, four pulling claws and five threaded rods; the guide sleeve is fixed to the moving wheel set shaft by bolts At the end, the four pulling claws are fixed between the rear cover of the axle box and the wheel hub through a clamp. One end of the rod is connected with four pulling claws, and the other end is fixed with the tailgate by a nut. Adjust the nut to make the tailgate closely fit with the hollow plunger hydraulic cylinder, and ensure that the tailgate is parallel to the axle end of the wheel. One end of a threaded rod is threaded to the guide sleeve, and the other end passes through the hollow plunger hydraulic cylinder and the rear baffle in turn and is limited by a nut.

Beneficial effects of the utility model: The unloading device of the present utility model solves the technical problem that the bearing axle box cannot be unloaded from the low-floor moving wheel by optimizing the design of the existing bearing unloading device.

The withdrawal device of the utility model also has the advantages of simple and practical structure, convenient operation, low cost, and easy popularization.

The withdrawal device of the utility model improves the utilization rate of existing equipment and tooling, and reduces the project cost caused by the abnormal production of the bogies of special vehicles.

Description of drawings

Fig. 1 is the composition structure diagram of the existing domestic rail vehicle bogie wheelset bearing axle box;

Fig. 2 is the structure diagram of the existing bearing withdrawal device;

Figure 3 is a schematic diagram of the relationship after the installation of Figure 2;

FIG. 4 is a structural diagram of the existing low-floor moving wheel pair bearing axle box;

FIG. 5 is a structural diagram of the bearing removal device for the moving wheel set according to the utility model;

Fig. 6 is the relational schematic diagram after the installation of Fig. 5;

FIG. 7 is a schematic diagram of the usage principle of FIG. 6 .

Detailed ways

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 1. The present embodiment will be described with reference to FIGS. 5 and 7. The bearing removal device for moving wheel sets includes a nut 1, a tailgate 2, a hollow plunger hydraulic cylinder 3, five threaded rods 4, four A pull claw 5, a clamp 6, a bolt 7 and a guide sleeve 8;

The guide sleeve 8 is fixed to the axle end of the moving wheel through the bolt 7, and the four pulling claws 5 are fixed between the rear cover of the axle box and the wheel hub through the clamp 6, and the clamp 6 is fixed on the four pulling claws 5. On the outside, make the four pulling claws firmly abut on the journal, one end of the four threaded rods 4 is connected with the four pulling claws 5, and the other end is fixed with the rear baffle 2 through the nut 1. Adjust the nut 1 to make the rear baffle 2. It is closely fitted with the hollow plunger hydraulic cylinder 3, and ensures that the tailgate is kept parallel to the axle end of the wheel. One end of a threaded rod 4 is threadedly connected to the guide sleeve 8, and the other end passes through the hollow plunger hydraulic pressure in turn. Cylinder 3 and tailgate 2 are limited by nut 1.

The pulling claw 5 described in this embodiment is processed according to the space in which the low-floor moving wheel is actually assembled to the bearing axle box, and is processed after three-dimensional simulation, and is made of 45CrNiMoA alloy structural steel with high tensile strength. The guide sleeve 8 is fixed on the shaft end by three bolts 7. The guide sleeve 8 has two functions, one is to ensure that the journal is not scratched during the bearing withdrawal process; The shaft end pier is coarsely deformed; both ends of the threaded rod 4 adopt M30 threads to transmit tension for bearing withdrawal.

The tailgate 2 described in this embodiment is connected by four threaded rods 4 and adjusted by the four threaded rods to ensure that the tailgate 4 and the front four pulling claws 5 are kept horizontal, and the bottom of the hollow plunger hydraulic cylinder 3 is at the same time. Fits tightly with tailgate 2.

The clamp 6 is fixed on the outer side of the four pulling claws 5 by two bolts, so as to ensure that the four pulling claws 5 can firmly abut on the journal, and the pulling claws always act on the dust retaining ring.

The hollow plunger hydraulic cylinder and the hydraulic workstation work together to provide a maximum pressure of 60t to provide power for bearing withdrawal.

The installation process of the bearing removal device for the moving wheel set described in this embodiment is as follows:

First, fix the guide sleeve 8 to the axle end of the driving wheel through bolts 7, then fix the four pulling claws 5 between the rear cover of the axle box and the wheel hub through the clamp 6, and connect a threaded rod 4 to the guide sleeve 8 Install the hollow plunger hydraulic cylinder 3 on the threaded rod, connect the remaining four threaded rods 4 to the four pulling claws 5 respectively, fix the tailgate 2 through the four threaded rods 4, and use the nuts 1. Make fine adjustments to ensure that the tailgate 2 can be tightly fitted with the hollow plunger hydraulic cylinder 3.

The working principle of the bearing removal device for the moving wheel set described in this embodiment is:

After the installation of the unloading device is completed, by starting the electro-hydraulic workstation, the piston of the hollow plunger hydraulic cylinder 3 is elongated, and a strong axial force is slowly applied to the guide sleeve 8 through the piston end of the hollow plunger hydraulic cylinder 3. The strong reaction force at the rear end of the hollow plunger hydraulic cylinder 3 is applied to the tailgate 2 to generate a strong axial withdrawal force. The axial withdrawal force is transmitted to the pulling claw 5 through the threaded rod 4, and the It is applied to the dust retaining ring through the end part of the pulling claw 5. When the axial withdrawal force reaches a certain level, the bearing and the dust retaining ring will be withdrawn from the axle journal together.

Claims (2)

1. Bearing removal device for moving wheel set, including guide sleeve (8), hollow plunger hydraulic cylinder (3), clamp (6), tailgate (2), four pulling claws (5) and Five threaded rods (4); characterized by: The guide sleeve (8) is fixed to the axle end of the moving wheel by bolts (7), and the four pulling claws (5) are fixed between the rear cover of the axle box and the wheel hub by a clamp (6). 6) It is fixed on the outside of the four pulling claws (5), so that the four pulling claws are firmly attached to the journal. One end of the four threaded rods (4) is connected with the four pulling claws (5), and the other end passes through the The nut (1) is fixed to the rear baffle (2). Adjust the nut (1) to make the rear baffle (2) closely fit with the hollow plunger hydraulic cylinder (3), and ensure that the rear baffle is parallel to the axle end of the wheel. One end of a threaded rod (4) is threadedly connected to the guide sleeve (8), and the other end passes through the hollow plunger hydraulic cylinder (3) and the rear baffle (2) in turn and is limited by a nut (1). 2 . The bearing removal device for a moving wheel set according to claim 1 , wherein the four pulling claws ( 5 ) are all made of 45CrNiMoA alloy structural steel. 3 .