Fatigue test wheel pair press fitting tool

Abstract

The utility model relates to a kind of fatigue test wheel pair press-mounting tool, comprising: press-mounting connecting block, the sleeve ring of being set on press-mounting connecting block and being in abutment with the wheel side surface of fatigue test wheel pair, the base of being set in press-mounting connecting block one side and the press-mounting sleeve between the sleeve ring and base, the shaft between press-mounting connecting block and fatigue test wheel pair is connected by several fixed parts, point welding connection is used between press-mounting sleeve and base, the fatigue test wheel pair press-mounting tool in the utility model is simple in structure, easy to install, when different sizes wheel pair are applied, only individual parts need to be replaced, without replacing the entire tool as in prior art, thus greatly reducing fatigue test cost, improving fatigue test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of transportation vehicle manufacturing, and in particular to a tooling for pressing wheelsets for fatigue testing. Background Technology

[0002] A wheelset is the part of a locomotive or rolling stock that comes into contact with the rails. It consists of two wheels, left and right, securely mounted on the same axle. The function of the wheelset is to ensure the locomotive or rolling stock's movement and steering on the rails, bear all static and dynamic loads from the locomotive or rolling stock, transfer them to the rails, and transfer loads caused by track irregularities to the various components of the locomotive or rolling stock.

[0003] The structure of fatigue test wheelsets differs from that of wheelsets on other rail vehicles. Fatigue testing is a destructive test that simulates various alternating loads (such as vertical force, lateral force, torque, etc.) experienced by wheelsets during long-term operation to verify their fatigue strength and lifespan. This is a crucial step in ensuring operational safety. In European and Chinese standards, one axle and one wheel are used for testing. With the development of rail transit towards high speed and heavy load, unprecedented demands have been placed on the reliability, safety, and service life of wheelsets. In our daily work, we have found that existing fatigue test wheelset pressing fixtures are typically only suitable for a single type of wheelset. When conducting fatigue tests on different types of wheelsets, it is necessary to replace or even redesign the entire fixture, resulting in high costs and long cycles. Furthermore, misaligned pressing may scratch the mating surfaces of the axle or wheel. These surface damages can become the initiation points of fatigue cracks under alternating loads, causing premature failure of the test piece and wasting expensive testing resources.

[0004] Therefore, it is necessary to provide a tooling for pressing fatigue test wheelsets to solve the above-mentioned technical problems. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a press-fitting tool applicable to various types of fatigue test wheelsets.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tooling for pressing fatigue test wheelsets, comprising: a pressing connecting block, a collar sleeved on the pressing connecting block and abutting against the wheel side of the fatigue test wheelset, a base disposed on one side of the pressing connecting block, and a pressing sleeve disposed between the collar and the base. The pressing connecting block is connected to the shaft of the fatigue test wheelset by several fasteners, and the pressing sleeve is spot-welded to the base.

[0007] Preferably, the tooling for pressing a fatigue test wheel set in this utility model is further configured as follows: the end of the collar that mates with the pressing sleeve is provided with a first boss, the end of the base that mates with the pressing sleeve is provided with a second boss, one end of the pressing sleeve is sleeved on the first boss of the collar, and the other end of the pressing sleeve is sleeved on the second boss of the base.

[0008] Preferably, the tooling for pressing fatigue test wheelsets in this utility model is further configured such that: the fixing element is a bolt, and the shaft of the fatigue test wheelset is provided with a threaded hole that mates with the bolt.

[0009] Preferably, the tooling for pressing fatigue test wheelsets in this utility model is further configured such that the threaded hole is coated with grease.

[0010] Preferably, the tooling for pressing fatigue test wheelsets in this utility model is further configured such that the number of threaded holes is three, and the three threaded holes are evenly distributed along the circumferential direction of the axis of the fatigue test wheelsets.

[0011] Preferably, the tooling for pressing a fatigue test wheel pair in this utility model is further configured such that the pressing connecting block, collar, base and pressing sleeve are all made of steel.

[0012] Preferably, the tooling for pressing a fatigue test wheel pair in this utility model is further configured such that the surfaces of the pressing connecting block, collar, base and pressing sleeve are all coated with anti-rust oil.

[0013] Compared with the prior art, the present invention has the following advantages: the fatigue test wheelset pressing tooling in the present invention has a simple structure and is easy to install. When applicable to wheelsets of different sizes, only a few parts need to be replaced, instead of replacing the entire tooling as in the prior art. Therefore, the fatigue test cost is greatly reduced and the fatigue test efficiency is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the tooling in this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the tooling and fatigue test wheelset after installation in this utility model.

[0016] Figure 1 and Figure 2 In the middle: 1. Press-fit connecting block, 2. Wheel, 3. Collar, 30. First boss, 4. Base, 40. Second boss, 5. Press-fit sleeve, 6. Shaft, 60. Threaded hole, 7. Fixing component. Detailed Implementation

[0017] The following detailed description of a fatigue testing wheel assembly tooling according to the present invention is provided through specific embodiments.

[0018] Please see Figure 1 and Figure 2 A tooling for pressing a fatigue test wheelset includes: a pressing connecting block 1, a collar 3 sleeved on the pressing connecting block 1 and abutting against the side of the wheel 2 of the fatigue test wheelset, a base 4 disposed on one side of the pressing connecting block 1, and a pressing sleeve 5 disposed between the collar 3 and the base 4. The pressing connecting block 1 is connected to the shaft 6 of the fatigue test wheelset by several fasteners 7, and the pressing sleeve 5 is spot-welded to the base 4. In this embodiment, the end of the collar 3 that mates with the pressing sleeve 5 has a first boss 30, and the end of the base 4 that mates with the pressing sleeve 5 has a second boss 40. One end of the pressing sleeve 5 is sleeved on the first boss 30 of the collar 3, and the other end of the pressing sleeve 5 is sleeved on the second boss 40 of the base 4. In this embodiment, the fastener 7 is a bolt, and the shaft 6 of the fatigue test wheelset is provided with three threaded holes 60 that mate with the bolt. These three threaded holes 60 are evenly distributed along the circumference of the shaft 6 of the fatigue test wheelset. The threaded holes 60 are coated with grease to prevent rust. In this embodiment, the press-fit connecting block 1, collar 3, base 4, and press-fit sleeve 5 are all made of steel, thus possessing high structural strength. The surfaces of the press-fit connecting block 1, collar 3, base 4, and press-fit sleeve 5 are all coated with rust-preventive oil for rust prevention.

[0019] The working principle of the tooling in this utility model is as follows: the press machine pushes the base 4 to move to the left. During the leftward movement of the base 4, the collar 3 and the press sleeve 5 move to the left together, thereby pushing the wheel 2 on the fatigue test wheelset to move to the left, completing the installation of the wheel 2 and the axle 6. When the size of the axle 6 remains unchanged, but the size of the wheel 2 changes, only the collar 3 needs to be replaced accordingly. The other press connecting block 1, base 4 and press sleeve 5 do not need to be replaced. When the sizes of both the axle 6 and the wheel 2 change, then the collar 3, press connecting block 1 and press sleeve 5 need to be replaced accordingly, but the base 4 does not need to be replaced.

[0020] In summary, the fatigue testing wheelset press-fitting fixture of this utility model has a simple structure and is easy to install. When applicable to wheelsets of different sizes, only a few parts need to be replaced, instead of replacing the entire fixture as in the prior art. Therefore, it greatly reduces the cost of fatigue testing and improves the efficiency of fatigue testing.

[0021] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A tooling for pressing wheelsets in fatigue testing, characterized in that: include: The components include a press-fit connecting block, a collar sleeved on the press-fit connecting block and abutting against the side of the wheel of the fatigue test wheelset, a base located on one side of the press-fit connecting block, and a press-fit sleeve located between the collar and the base. The press-fit connecting block is connected to the shaft of the fatigue test wheelset by several fasteners, and the press-fit sleeve is connected to the base by spot welding.

2. The tooling for pressing fatigue test wheelsets as described in claim 1, characterized in that: The end of the collar that mates with the press-fit sleeve is provided with a first boss, and the end of the base that mates with the press-fit sleeve is provided with a second boss. One end of the press-fit sleeve is fitted onto the first boss of the collar, and the other end of the press-fit sleeve is fitted onto the second boss of the base.

3. The tooling for pressing fatigue test wheelsets as described in claim 1, characterized in that: The fastener is a bolt, and the shaft of the fatigue test wheelset is provided with a threaded hole that mates with the bolt.

4. The tooling for pressing fatigue test wheelsets as described in claim 3, characterized in that: The threaded hole is coated with grease.

5. The tooling for pressing fatigue test wheelsets as described in claim 3, characterized in that: The number of threaded holes is three, and the three threaded holes are evenly distributed along the circumferential direction of the fatigue test wheelset axis.

6. The tooling for pressing fatigue test wheelsets as described in claim 1, characterized in that: The press-fit connecting block, collar, base, and press-fit sleeve are all made of steel.

7. The tooling for pressing fatigue test wheelsets as described in claim 1, characterized in that: The surfaces of the press-fit connecting block, collar, base, and press-fit sleeve are all coated with anti-rust oil.

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