Flange assembly type axle box spring suitable for automatic production and production method thereof

Abstract

The invention provides a flange assembly type axle box spring suitable for automatic production and a production method of the flange assembly type axle box spring. The flange assembly type axle box spring suitable for automatic production comprises a core shaft and a rubber body integrally vulcanized on the outer side of the core shaft, the core shaft comprises a thick section and a thin section, the rubber body is integrally vulcanized on the outer side of the thick section, a flange plate is arranged on the outer side of the thin section in an interference fit mode, and the flange plate is arranged on the outer side of the thin section. The end face of the flange plate is attached to the end face of the thick section. The production method of the flange assembly type axle box spring suitable for automatic production comprises the steps of vulcanization, assembly and the like. The flange assembly type axle box spring suitable for automatic production solves the problems.

Description

Technical Field

[0001] The present invention relates to the field of axle box springs, and particularly to a flange-assembled axle box spring suitable for automated production and a production method thereof. Background Art

[0002] The axle box spring is a key component of the primary suspension of a vehicle, which is installed between the axle box and the frame to play a role in supporting and damping, and at the same time provides appropriate lateral and longitudinal positioning stiffness for the primary suspension of the vehicle. The basic structure of the axle box spring is that a conical rubber body is vulcanized on the mandrel, and the rubber body is used to achieve the functions of support and damping. In the existing axial springs, a flange is integrally provided on the mandrel. For example, in the utility model patent with the application number "201220178283.5", the applicant is "Changzhou Zhonghao Rail Transit Technology Development Co., Ltd.", and the name is "Axle Box Spring for Urban Light Rail Vehicles", and the solution disclosed in the invention patent with the application number "201010285627.8", the applicant is "Liyang Zhenda Railway Equipment Co., Ltd.", and the name is "Axle Box Spring of Urban Rail Train Bogie" are both such designs.

[0003] The defect of such a design is that the presence of the flange makes it inconvenient for the mandrel to enter and exit the mold during vulcanization, and it is difficult to achieve automated production. The size and specifications of the flange are fixed, and separate molds need to be opened for different models of products, resulting in high production and management costs. In some cases, gaskets need to be provided on the end face of the flange to adjust the working height of the product, and the gaskets can only be fixed at the bottom of the flange by gluing, resulting in complex processes and high production costs. Summary of the Invention

[0004] In order to solve the defects that the existing axle box springs are difficult to achieve automated production, have complex processes, and high production and management costs, the present invention provides a flange-assembled axle box spring suitable for automated production and a production method thereof to solve the above problems.

[0005] A flange-assembled axle box spring suitable for automated production includes a mandrel and a rubber body integrally vulcanized on the outer side of the mandrel. The mandrel includes two sections of different thicknesses. Among them, the rubber body is integrally vulcanized on the outer side of the thick section, and a flange is provided on the outer side of the thin section in an interference fit manner, and the end face of the flange is attached to the end face of the thick section.

[0006] In a preferred embodiment of the flange-assembled axle box spring suitable for automated production provided by the present invention, one or more pin holes are provided on the side of the flange away from the rubber body, and matching positioning pins are provided in some or all of the pin holes.

[0007] In a preferred embodiment of the flange-assembled axle box spring applicable to automated production provided by the present invention, it further includes a gasket. The gasket is an annular gasket, the inner diameter of which is equal to the inner diameter of the thin section, and the outer diameter is less than or equal to the outer diameter of the flange. The gasket is sleeved outside the thin section and clamped between the flange and the thick section.

[0008] In a preferred embodiment of the flange-assembled axle box spring applicable to automated production provided by the present invention, the edge of the thin section away from the thick section is chamfered. A threaded mounting hole is provided at the center of the end face of the thin section away from the thick section.

[0009] In a preferred embodiment of the flange-assembled axle box spring applicable to automated production provided by the present invention, the thick section is frustum-shaped, with a larger diameter at the end closer to the thin section and tapering in the direction away from the thin section. A blind hole is provided at the center of the end face of the thick section away from the thin section.

[0010] A production method of a flange-assembled axle box spring applicable to automated production includes the following steps: Step 1: Assemble the mandrel, partition plate and mold, inject rubber and vulcanize to form a rubber body containing the partition plate, and glue it to the outside of the thick section of the mandrel; Step 2: Press-fit the flange into the head of the thin section of the mandrel with an interference fit until reaching the root of the thin section of the mandrel, so that the end face of the flange is in contact with the end face of the thick section of the mandrel.

[0011] In a preferred embodiment of the production method of the flange-assembled axle box spring applicable to automated production provided by the present invention, Step 2 includes: Step 2.1: Place the gasket into the head of the thin section of the mandrel until reaching the root of the thin section of the mandrel, so that the end face of the gasket is in contact with the end face of the thick section of the mandrel; Step 2.2: Press-fit the flange into the head of the thin section of the mandrel with an interference fit until reaching the root of the thin section of the mandrel, so that the end faces of the flange, gasket and thick section of the mandrel are in contact in sequence.

[0012] In a preferred embodiment of the production method of the flange-assembled axle box spring applicable to automated production provided by the present invention, the flange is preset with a positioning pin; Step 2 includes: Step 2.1: Place the gasket into the head of the thin section of the mandrel until reaching the root of the thin section of the mandrel, so that the end face of the gasket is in contact with the end face of the thick section of the mandrel; Step 2.2: Based on the positional relationship between the positioning pin and the marking on the outer sleeve, use an assembly tooling to press-fit the flange into the head of the thin section of the mandrel with an interference fit until reaching the root of the thin section of the mandrel, so that the end faces of the flange, gasket and thick section of the mandrel are in contact in sequence.

[0013] Compared with the prior art, the flange-assembled axle box spring applicable to automated production provided by the present invention and its production method have the following beneficial effects: 1. In the solution provided by the present invention, the product is vulcanized without a flange, which facilitates entry and exit from the mold. An automated robotic arm can be used for entry and exit from the mold, thereby improving the degree of production automation.

[0014] 2. In the solution provided by the present invention, a split flange is adopted. The size and specifications of the flange, including whether it has a positioning pin or not, can be selected and designed according to actual needs. The product can adapt to various working conditions by replacing the flange, significantly reducing production and management costs.

[0015] 3. In the solution provided by the present invention, the flange and the mandrel are press-fitted with interference to ensure that the flange does not separate from the mandrel during assembly and operation.

[0016] 4. In the solution provided by the present invention, a chamfer is provided at the head of the mandrel, transitioning from a clearance fit to an interference fit during the assembly process to ensure that there are no appearance problems such as scratches at the head of the mandrel.

[0017] 5. In the solution provided by the present invention, if the product needs to be adjusted for the working height by adding a gasket, the gasket can be press-fitted and fixed above the flange, avoiding the disadvantages of using glue for fixation. Description of the Drawings

[0018] Figure 1 is a cross-sectional view of the flange-assembled axle box spring applicable to automated production.

[0019] Reference numerals in the figure: mandrel 1, rubber body 2, flange 3, gasket 4, positioning pin 5. Detailed Embodiments

[0020] 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 of the embodiments.

[0021] Please refer to Figure 1 , which is a cross-sectional view of the flange-assembled axle box spring applicable to automated production provided by the present invention.

[0022] The flange-assembled axle box spring applicable to automated production includes a mandrel 1, a rubber body 2, a flange 3, a gasket 4, and a positioning pin 5.

[0023] The upper section of the mandrel 1 is thicker, denoted as the thick section. The lower end of the thick section has a larger diameter, which gradually narrows upwards, and a blind hole is provided at the center of the top. The lower section of the mandrel 1 is thinner, with a diameter smaller than the thinnest part of the thick section, denoted as the thin section. The lower edge of the thin section adopts a C0.5 chamfer for transition, and a threaded mounting hole is provided at the center of the bottom. Between the thick section and the thin section of the mandrel 1, a right-angle step structure is formed.

[0024] The rubber body 2 is the same as that in the prior art and will not be elaborated here.

[0025] The flange 3 is pressed into the bottom from the lower end of the thin section of the mandrel 1. The chamfer can prevent damage to the head of the mandrel during the assembly process, resulting in appearance problems. The flange 3 and the mandrel 1 are press-fitted with an interference fit to ensure that the product does not separate from the mandrel 1 during the assembly and operation processes.

[0026] For the case where the gasket 4 needs to be set, first press the gasket into the bottom from the lower end of the thin section of the mandrel 1, and then press the flange 3 into the bottom from the lower end of the thin section of the mandrel 1.

[0027] For the flange 3 with the positioning pin 5, based on the positional relationship between the positioning pin 5 and the outer sleeve marking, use the assembly tooling to press the flange 3 into the bottom.

[0028] The production method of the flange-assembled axle box spring applicable to automated production includes: Step 1: Assemble the mandrel 1, the partition plate and the mold, inject rubber and vulcanize to form the rubber body 2 containing the partition plate, and glue it to the outside of the thick section of the mandrel 1; Step 2: Press the flange 3 into the lower end of the thin section of the mandrel 1 until the root of the thin section of the mandrel 1, so that the end face of the flange 3 is in contact with the end face of the thick section of the mandrel 1.

[0029] For the case where the gasket 4 needs to be set: Step 1: Assemble the mandrel 1, the partition plate and the mold, inject rubber and vulcanize to form the rubber body 2 containing the partition plate, and glue it to the outside of the thick section of the mandrel 1; Step 2.1: Place the gasket 4 into the head of the thin section of the mandrel 1 until the root of the thin section of the mandrel 1, so that the end face of the gasket 4 is in contact with the end face of the thick section of the mandrel 1; Step 2.2: Press the flange 3 into the head of the thin section of the mandrel 1 with an interference fit until the root of the thin section of the mandrel 1, so that the end faces of the flange 3, the gasket 4 and the thick section of the mandrel 1 are in contact in sequence.

[0030] For the flange 3 with the positioning pin 5: Step 1: Assemble the mandrel 1, the partition plate and the mold, inject rubber and vulcanize to form the rubber body 2 containing the partition plate, and glue it to the outside of the thick section of the mandrel 1; Step 2.1: Place the gasket 4 into the head of the thin section of the mandrel 1 until the root of the thin section of the mandrel 1, so that the end face of the gasket 4 is in contact with the end face of the thick section of the mandrel 1; Step 2.2: Based on the positional relationship between the positioning pin 5 and the outer sleeve identification, that is, ensuring the correct installation position of the positioning pin 5 between the axle box and the frame, use the assembly tooling to press-fit the flange 3 from the head of the thin section of the mandrel 1 with interference fit until reaching the root of the thin section of the mandrel 1, so that the end faces of the flange 3, the gasket 4 and the thick section of the mandrel 1 are sequentially in contact.

[0031] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. 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 be equally included in the patent protection scope of the present invention.

Claims

1. A flange-assembled axle box spring suitable for automated production, comprising a core shaft and a rubber body integrally vulcanized on the outer side of the core shaft, characterized in that: The core shaft comprises two sections, a thick section and a thin section, wherein the rubber body is integrally vulcanized on the outside of the thick section, and a flange is provided on the outside of the thin section in an interference fit manner, and the end face of the flange is in contact with the end face of the thick section.

2. The flange-assembled axle box spring suitable for automated production according to claim 1, characterized in that: The flange is provided with one or more pin holes on a side away from the rubber body, and matching positioning pins are provided in part or all of the pin holes.

3. The flange-assembled axle box spring suitable for automated production according to claim 1, characterized in that: It also includes a gasket, which is an annular gasket with an inner diameter equal to the inner diameter of the thin section and an outer diameter less than or equal to the outer diameter of the flange. The gasket is sleeved outside the thin section and clamped between the flange and the thick section.

4. The flange-assembled axle box spring suitable for automated production according to any one of claims 1 to 3, characterized in that: The edge of one end of the thin section away from the thick section is chamfered.

5. The flange-assembled axle box spring suitable for automated production according to claim 4, characterized in that: A threaded mounting hole is provided at the center of the end surface of the thin section away from the thick section.

6. The flange-assembled axle box spring suitable for automated production according to any one of claims 1 to 3, characterized in that: The thick section is in a frustum shape, and the diameter of one end of the thick section close to the thin section is larger and decreases in the direction away from the thin section.

7. The flange-assembled axle box spring suitable for automated production according to claim 6, characterized in that: A blind hole is provided at the center of the end surface of the thick section away from the thin section.

8. A method for producing a flange-assembled axle box spring suitable for automated production, characterized in that: The following steps are involved: Step 1: Assemble the mandrel, the partition and the mold, inject rubber and vulcanize to form a rubber body including the partition, and glue it to the outside of the mandrel thick section; Step 2: Press the flange from the head of the thin section of the mandrel to the root of the thin section of the mandrel with an interference fit, so that the end face of the flange fits with the end face of the thick section of the mandrel.

9. The method for producing a flange-assembled axle box spring suitable for automated production according to claim 8, characterized in that: The step 2 comprises: Step 2.1: Insert the gasket from the head of the thin section of the mandrel to the root of the thin section of the mandrel, so that the end surface of the gasket fits with the end surface of the thick section of the mandrel; Step 2.2: Press the flange from the head of the thin section of the mandrel to the root of the thin section of the mandrel with an interference fit, so that the end faces of the flange, gasket and the thick section of the mandrel fit in sequence.

10. The method for producing a flange-assembled axle box spring suitable for automated production according to claim 9, characterized in that: The flange is pre-set with positioning pins; The step 2 comprises: Step 2.1: Insert the gasket from the head of the thin section of the mandrel to the root of the thin section of the mandrel, so that the end surface of the gasket fits with the end surface of the thick section of the mandrel; Step 2.2: Based on the positional relationship between the locating pin and the sleeve mark, use the assembly tool to press the flange from the head of the thin section of the mandrel to the root of the thin section of the mandrel with an interference fit, so that the end faces of the flange, gasket and the thick section of the mandrel fit in sequence.

Images