Integral rotor node and method of moulding

Abstract

The application provides a whole swivel arm node and a moulding method thereof. The whole swivel arm node comprises a core shaft, an outer sleeve sleeved outside the core shaft, and a rubber layer arranged between the core shaft and the outer sleeve, and the outer sleeve is in a cylindrical structure. The moulding method of the whole swivel arm node comprises the steps of gluing, assembling, reducing diameter, vulcanization and the like. The whole swivel arm node and the moulding method thereof provided by the application solve the problems of high processing cost and complex assembly process of the existing swivel arm node.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nodes for rail vehicles, in particular to a whole type of swing arm node and a method for assembling the same. BACKGROUND

[0002] The swing arm node is installed in the swing arm of the axle box of a bogie, and is used for transmitting the traction force and lateral force of the bogie, and plays a role of flexible connection and realization of the position of the axle box. The swing arm node is widely used in light rail, subway, ordinary passenger car and high-speed train bogie, and is a class A key component of a train, and the performance of the swing arm node directly affects the stability of the vehicle in motion. Generally, the swing arm node allows a relatively large vertical displacement of the axle box relative to the frame, and the relative displacement in the lateral and longitudinal directions between the wheel set and the frame is realized by the deformation of the swing arm node. Therefore, the elastic stiffness of the swing arm node in the lateral and longitudinal directions has specific requirements. Therefore, the outer diameter of the core shaft of the swing arm node is often designed to be larger than the minimum inner diameter of the sleeve, so that the swing arm node cannot be assembled into the mold. The usual solution is to design the sleeve in a split structure to realize the assembly of the mold, but this method has high processing cost of the sleeve and complex subsequent assembly process. SUMMARY

[0003] In order to solve the problems of high processing cost and complex assembly process of the existing swing arm node, the present application provides a whole type of swing arm node and a method for assembling the same.

[0004] A whole type of swing arm node comprises a core shaft, a sleeve surrounding the core shaft, and a rubber layer between the core shaft and the sleeve, and the sleeve is a cylindrical structure.

[0005] In a preferred embodiment of the whole type of swing arm node provided by the present application, the core shaft comprises a middle section and mounting sections integrally arranged at both ends of the middle section; the diameter of the middle section is larger than the diameter of the mounting sections, and the two ends of the middle section are further thickened.

[0006] In a preferred embodiment of the whole type of swing arm node provided by the present application, the sleeve is a cylindrical structure, and the inner wall of the sleeve is thickened inwardly near the middle section.

[0007] In a preferred embodiment of the whole type of swing arm node provided by the present application, the diameter of the thickened position of the middle section is larger than the inner diameter of the thickened position of the sleeve.

[0008] A method for assembling a whole type of swing arm node, comprising the following steps:

[0009] Step 1: respectively applying glue on the outer wall of the core shaft and the inner wall of the sleeve;

[0010] Step 2: assembling the core shaft and the sleeve, maintaining the assembled state of the core shaft and the sleeve, and placing them in a reduced diameter tool, and compressing the sleeve to a minimum inner diameter smaller than the maximum outer diameter of the core shaft;

[0011] Step 3: maintain the assembly state of the mandrel and the outer sleeve, place in the vulcanization tool, inject rubber between the two and vulcanize.

[0012] In a preferred embodiment of the mold assembling method of the integral rotating arm node provided by the present application, gaps are maintained between the mandrel and the outer sleeve in the step 2 and the step 3.

[0013] In the step 2, the reducing tool fixes the mandrel and the outer sleeve respectively, and maintains the gaps between the mandrel and the outer sleeve during the reducing process.

[0014] In the step 3, the vulcanization tool fixes the mandrel and the outer sleeve respectively, and maintains the gaps between the mandrel and the outer sleeve during the vulcanization process.

[0015] Compared with the prior art, the integral rotating arm node and the mold assembling method thereof provided by the present application have the following beneficial effects:

[0016] 1. The integral rotating arm node in the present application adopts an integral outer sleeve, which can obtain more suitable transverse and longitudinal elastic stiffness and effectively relieve the vertical impact load.

[0017] 2. The mold assembling method of the integral rotating arm node in the present application reduces the outer sleeve before vulcanization, realizes the assembly without splitting, and is simple in operation and low in cost.

[0018] 3. The mold assembling method of the integral rotating arm node in the present application vulcanizes after the assembly of the mandrel and the integral outer sleeve is completed, which is simple in operation and low in cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the integral rotating arm node;

[0020] Figure 2 is a structural schematic diagram of the mold assembling method of the integral rotating arm node.

[0021] The reference numerals in the figure are: mandrel 1, middle section 11, mounting section 12, outer sleeve 2, and rubber layer 3. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0023] Please refer to Figure 1 is a structural schematic diagram of the integral rotating arm node provided by the present application.

[0024] The integral rotating arm node comprises a mandrel 1, an outer sleeve 2 and a rubber layer 3.

[0025] The mandrel 1 comprises a middle section 11 and mounting sections 12 integrally provided at both ends of the middle section 11. The middle section 11 has a smaller diameter in the middle and larger diameters at both ends, with a round transition between the two. The mounting sections 12 are located above the two ends of the middle section 11. The minimum diameter of the middle section 11 is larger than the diameter of the mounting sections 12.

[0026] The sleeve 2 has a cylindrical structure, with a circular outer wall and a circular inner wall that is thickened inwardly at a middle position, and is roughly embedded with the thinner middle part of the middle section 11. In the finished product, the inner diameter of the thickened position of the sleeve 2 is smaller than the outer diameter of the two end positions of the middle section 11.

[0027] The middle section 11 and the sleeve 2 are vulcanized with a rubber layer 3 therebetween.

[0028] Please refer to Figure 2 is a structural schematic diagram of the mold assembly method of the integral swivel arm node provided by the present application. The mold assembly method of the integral swivel arm node comprises the following steps:

[0029] Step 1: Prepare the mandrel 1 and the sleeve 2, as shown in Figure 2 -a. The structure of the mandrel 1 and the sleeve 2 is consistent with the above, but the diameter of the sleeve 2 is larger. At this time, the inner diameter of the thickened position of the sleeve 2 is larger than the outer diameter of the two end positions of the middle section 11.

[0030] Step 2: First, apply a rubber layer for vulcanization on the outer surface of the middle section 11 of the mandrel 1 and the inner wall of the sleeve 2. As shown in Figure 2 -b.

[0031] Since the minimum inner diameter of the sleeve 2 is larger than the maximum outer diameter of the mandrel 1, the sleeve 2 can be smoothly fitted onto the mandrel 1 to complete the assembly. As shown in Figure 2 -c.

[0032] Maintain the assembled state of the mandrel 1 and the sleeve 2 and avoid contact between them. Place them in a diameter-reducing tool to fix the mandrel 1 and the sleeve 2, respectively. As shown in Figure 2 -d. Subsequently, the diameter of the sleeve 2 is reduced by pressing the sleeve 2 with the diameter-reducing tool.

[0033] After the diameter reduction is completed, the target size is reached, i.e., the inner diameter of the thickened position of the sleeve 2 is smaller than the outer diameter of the two end positions of the middle section 11. As shown in Figure 2 -e.

[0034] Step 3: Continue to maintain the assembled state of the mandrel 1 and the sleeve 2 and avoid contact between them. Place them in a vulcanization tool to fix the mandrel 1 and the sleeve 2, respectively. Then inject rubber between the mandrel 1 and the sleeve 2 and vulcanize to form. As shown in Figure 2 -f.

[0035] The above merely illustrates the embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process conversion, or direct or indirect application in other related technical fields, which is made by using the content of the present application, is also included in the patent protection scope of the present application.

Claims

1. A method of moulding a monolithic rotor node, characterised by: The integral rotating arm node comprises a core shaft, an outer sleeve sleeved on the core shaft, and a rubber layer arranged between the core shaft and the outer sleeve, the core shaft comprises a middle section and mounting sections integrally arranged at both ends of the middle section, the diameter of the middle section is larger than that of the mounting sections, and the two ends of the middle section are further thickened, the outer sleeve is in a cylindrical structure, the inner wall of the outer sleeve is thickened inwardly near the middle section, the diameter of the thickened position of the middle section is larger than the inner diameter of the thickened position of the outer sleeve; The molding method of the integral rotating arm node comprises the following steps: Step 1: respectively coating vulcanizing glue on the outer wall of the core shaft and the inner wall of the outer sleeve, at this time, the inner diameter of the thickened position of the outer sleeve is larger than the diameter of the thickened position of the middle section; Step 2: sleeving the outer sleeve on the core shaft, maintaining the assembled state of the core shaft and the outer sleeve, and placing in a diameter-reducing tooling, maintaining the gap between the core shaft and the outer sleeve, and compressing the outer sleeve to the inner diameter of the thickened position of the outer sleeve being smaller than the diameter of the thickened position of the middle section; Step 3: maintaining the assembled state of the core shaft and the outer sleeve, placing in a vulcanizing tooling, maintaining the gap between the core shaft and the outer sleeve, injecting rubber between the core shaft and the outer sleeve, and vulcanizing and forming.

2. The method of claim 1, wherein: In the step 2, the diameter-reducing tooling respectively fixes the core shaft and the outer sleeve, and maintains the gap between the core shaft and the outer sleeve not being in contact during the diameter-reducing process.

3. The method of claim 1, wherein: In the step 3, the vulcanizing tooling respectively fixes the core shaft and the outer sleeve, and maintains the gap between the core shaft and the outer sleeve not being in contact during the vulcanizing process.

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