Integral rotating arm joint and die filling method thereof

Abstract

The invention provides an integral rotating arm joint and a die filling method thereof. The integral rotating arm joint comprises a mandrel, an outer sleeve and a rubber layer, the mandrel is sleeved with the outer sleeve, the rubber layer is arranged between the mandrel and the outer sleeve, and the outer sleeve is of a cylindrical structure. The die-filling method of the integral tumbler joint comprises the steps of gluing, assembling, reducing, vulcanizing and the like. According to the integral type rotating arm joint and the die filling method thereof, the problems that an existing rotating arm joint is high in machining cost and complex in assembling procedure are solved.

Description

Technical Field

[0001] The present invention relates to the field of nodes for rail vehicles, and particularly to an integral swing arm node and its die loading method. Background Art

[0002] The swing arm node is installed in the swing arm of the bogie axle box, and is used to transmit the traction force and lateral force of the bogie, playing a role of flexible connection and realizing the position of the axle box. It is widely used in the bogies of light rails, subways, ordinary passenger cars and high-speed multiple units, and is a key component of type A for trains. Its performance directly affects the running stability of the vehicle. Usually, the swing arm node allows a relatively large vertical displacement of the axle box relative to the frame, and the lateral and longitudinal relative displacements between the wheel set and the frame are realized by the deformation of the swing arm node. Therefore, there are specific requirements for the elastic stiffness of the swing arm node in the lateral and longitudinal directions. For this reason, the outer diameter of the core shaft often exceeds the minimum inner diameter of the outer sleeve, resulting in the swing arm node being unable to be loaded into the die during assembly. Usually, the solution is to design the outer sleeve as a split structure to achieve die loading, but this method has a high processing cost for the outer sleeve and complex subsequent assembly processes. Summary of the Invention

[0003] To solve the problems of high processing cost and complex assembly process of the existing swing arm nodes, the present invention provides an integral swing arm node and its die loading method to solve the above problems.

[0004] An integral swing arm node includes a core shaft, an outer sleeve sleeved outside the core shaft, and a rubber layer provided between the two. The outer sleeve is of a cylindrical structure.

[0005] In a preferred embodiment of the integral swing arm node provided by the present invention, the core shaft includes an intermediate section and installation sections integrally provided at both ends of the intermediate section; the diameter of the intermediate section is larger than that of the installation sections, and both ends of the intermediate section are further thickened.

[0006] In a preferred embodiment of the integral swing arm node provided by the present invention, the outer sleeve is of a cylindrical structure, and its inner wall is thickened inwardly near the intermediate section.

[0007] In a preferred embodiment of the integral swing arm node provided by the present invention, the diameter of the thickened position of the intermediate section is larger than the inner diameter of the thickened position of the outer sleeve.

[0008] A die loading method for an integral swing arm node includes the following steps: Step 1: Apply glue on the outer wall of the core shaft and the inner wall of the outer sleeve respectively; Step 2: Assemble the core shaft and the outer sleeve, maintain their assembled state and place them in a diameter-reducing tooling, and compress the outer sleeve until its minimum inner diameter is smaller than the maximum outer diameter of the core shaft; Step 3: Maintain the assembled state of the mandrel and the outer sleeve, place them in the vulcanization tooling, and inject rubber between the two and vulcanize and form it.

[0009] In a preferred embodiment of the mold loading method of the integral swivel arm joint provided by the present invention, in the said Step 2 and the said Step 3, a gap is maintained between the mandrel and the outer sleeve.

[0010] In the said Step 2, the diameter-reducing tooling fixes the mandrel and the outer sleeve respectively, and during the diameter-reducing process, a gap is maintained between the mandrel and the outer sleeve without contact.

[0011] In the said Step 3, the vulcanization tooling fixes the mandrel and the outer sleeve respectively, and during the vulcanization process, a gap is maintained between the mandrel and the outer sleeve without contact.

[0012] Compared with the prior art, the integral swivel arm joint and its mold loading method provided by the present invention have the following beneficial effects: 1. The integral swivel arm joint in the present invention adopts an integral outer sleeve, which can obtain more appropriate lateral and longitudinal elastic stiffness and effectively relieve the vertical impact load.

[0013] 2. The mold loading method of the integral swivel arm joint in the present invention reduces the diameter of the outer sleeve before vulcanization, realizes the assembly without splitting, and has simple operation and low cost.

[0014] 3. The mold loading method of the integral swivel arm joint in the present invention vulcanizes after the mandrel and the integral outer sleeve are assembled, and has simple operation and low cost. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the integral swivel arm joint; Figure 2 is a schematic structural diagram of the mold loading method of the integral swivel arm joint.

[0016] Reference numerals in the figure: mandrel 1, middle section 11, installation section 12, outer sleeve 2, rubber layer 3. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0018] Please refer to Figure 1 , which is a schematic structural diagram of the integral swivel arm joint provided by the present invention.

[0019] The integral swivel arm joint includes a mandrel 1, an outer sleeve 2 and a rubber layer 3.

[0020] The mandrel 1 includes an intermediate section 11 and mounting sections 12 integrally provided at both ends thereof. The middle part of the intermediate section 11 has a smaller diameter, and the two ends have a larger diameter, with a fillet transition therebetween. The mounting sections 12 are located at positions above the two ends of the intermediate section. The minimum diameter of the intermediate section 11 is larger than the diameter of the mounting ends 12.

[0021] The outer sleeve 2 has a cylindrical structure, its outer wall is a circular wall, and a layer is thickened inwardly at a position near the middle of its inner wall, and its shape generally fits with the thinner middle part of the intermediate section 11. In the finished product, the inner diameter of the thickened position in the middle of the outer sleeve 2 is smaller than the outer diameter of the two ends of the intermediate section 11.

[0022] A rubber layer 3 is vulcanized between the intermediate section 11 and the outer sleeve 2.

[0023] Please refer to Figure 2 , which is a schematic structural diagram of the mold loading method for the integral swivel arm joint provided by the present invention. The mold loading method for the integral swivel arm joint includes the following steps: Step 1: Prepare the mandrel 1 and the outer sleeve 2, as shown in Figure 2 -a. The structures of the mandrel 1 and the outer sleeve 2 are the same as those in the above text, but the diameter of the outer sleeve 2 is larger. At this time, the inner diameter of the thickened position in the middle of the outer sleeve 2 is larger than the outer diameter of the two ends of the intermediate section 11.

[0024] Step 2: First, apply a vulcanizing glue layer on the outside of the intermediate section 11 of the mandrel 1 and the inner wall of the outer sleeve 2. As shown in Figure 2 -b.

[0025] Since the minimum inner diameter of the outer sleeve 2 is larger than the maximum outer diameter of the mandrel 1, the outer sleeve 2 can be smoothly sleeved onto the mandrel 1 to complete the assembly. As shown in Figure 2 -c.

[0026] Maintain the assembled state of the mandrel 1 and the outer sleeve 2 and prevent contact between the two. Place them in a diameter-reducing tooling and fix the mandrel 1 and the outer sleeve 2 respectively. As shown in Figure 2 -d. Then, apply pressure to the outer sleeve 2 through the diameter-reducing tooling to reduce its diameter.

[0027] After the diameter reduction is completed to reach the target size, that is, the inner diameter of the thickened position in the middle of the outer sleeve 2 is smaller than the outer diameter of the two ends of the intermediate section 11. As shown in Figure 2 -e.

[0028] Step 3: Continue to maintain the assembled state of the mandrel 1 and the outer sleeve 2 and prevent contact between the two. Place them in a vulcanizing tooling and fix the mandrel 1 and the outer sleeve 2 respectively. Then inject rubber between the mandrel 1 and the outer sleeve 2 and vulcanize it into shape. As shown in Figure 2 -f.

[0029] The above are only embodiments of the present invention, and do not thereby limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. An integral boom node, comprising a core shaft, a jacket sleeved outside the core shaft, and a rubber layer arranged between the core shaft and the jacket, characterized in that: The outer sleeve is a cylindrical structure.

2. The integrated boom node according to claim 1, characterized in that: The core shaft comprises a middle section and mounting sections integrally arranged at two ends of the middle section; the diameter of the middle section is larger than the diameter of the mounting section, and the two ends of the middle section are further thickened.

3. The integrated boom node according to claim 2, characterized in that: The outer sleeve is a cylindrical structure, and the inner wall thereof is thickened inwardly near the middle section.

4. The integrated boom node according to claim 3, characterized in that: The diameter of the thickened position of the middle section is greater than the inner diameter of the thickened position of the outer sleeve.

5. A method for molding an integral swivel joint according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Apply glue to the outer wall of the mandrel and the inner wall of the outer sleeve respectively; Step 2: Assemble the mandrel and the outer sleeve, keep them in the assembled state and place them in the reducing tool, compress the outer sleeve until its minimum inner diameter is smaller than the maximum outer diameter of the mandrel; Step 3: Maintain the assembly state of the core shaft and the outer sleeve, and place them in the vulcanization equipment, inject rubber between the two and vulcanize them into shape.

6. The mold assembly method of the integral swivel joint according to claim 5, characterized in that: In step 2 and step 3, a gap is maintained between the core shaft and the outer sleeve.

7. The mold assembly method of the integral swivel joint according to claim 6, characterized in that: In step 2, the reducing tool fixes the mandrel and the outer sleeve respectively, and maintains a gap and non-contact between the mandrel and the outer sleeve during the reducing process.

8. The mold assembly method of the integral swivel joint according to claim 6, characterized in that: In step 3, the vulcanization equipment fixes the mandrel and the outer sleeve respectively, and maintains a gap and non-contact between the mandrel and the outer sleeve during the vulcanization process.

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