A series of suspended conical rubber stacks

Abstract

This utility model relates to the field of rubber stack technology, and more particularly to a series suspended conical rubber stack, comprising an upper connecting seat, a lower connecting seat, an intermediate support cylinder, and a conical rubber body. The upper connecting seat, lower connecting seat, and intermediate support cylinder are all made of metal and are integrally formed through a vulcanization process. The conical rubber body has a stepped conical structure, and is divided into a first conical segment, a second conical segment, and a third conical segment along the axial direction from bottom to top. The conical segments are connected by arc transitions. This utility model's rubber stack exhibits differentiated stiffness characteristics in the vertical, lateral, and shear directions. Compared to traditional uniform cross-section structures, it can simultaneously adapt to the diverse stiffness requirements of rail transit vehicles in different directions, effectively solving the problem of singular elastic parameters and improving the stability and smoothness of vehicle operation.

Description

Technical Field

[0001] This utility model relates to the field of rubber stack technology, and in particular to a series suspended conical rubber stack. Background Technology

[0002] EMUs are currently the main type of high-speed trains in my country. To ensure the stability and smoothness of the train's operation, both the primary and secondary suspensions of the EMU bogies require a large number of rubber components. In particular, the primary suspension requires rubber stacks that provide flexible support between the frame and the axle box.

[0003] Traditional single-stage suspension rubber stacks have a significant problem of uniformity in their elastic properties. Their structural design often adopts uniform cross-sections, such as cylinders or cuboids of equal thickness, resulting in unidirectional optimization characteristics of elastic parameters. This makes it impossible to simultaneously meet the diverse mechanical requirements of rail transit vehicles for vertical stiffness, lateral stiffness, and shear stiffness, resulting in extremely poor adaptability. Utility Model Content

[0004] The purpose of this invention is to address the following shortcomings in the existing technology: the elastic characteristics of traditional primary suspension rubber stacks are significantly limited, and their structural designs often use uniform cross-sections, such as cylinders or cuboids of equal thickness, resulting in unidirectional optimization characteristics of elastic parameters. This makes it impossible to simultaneously meet the diverse mechanical requirements of rail transit vehicles for vertical stiffness, lateral stiffness, and shear stiffness, resulting in extremely poor adaptability. Therefore, this invention proposes a primary suspension conical rubber stack.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A series of suspended conical rubber stacks includes an upper connecting seat, a lower connecting seat, an intermediate support cylinder, and a conical rubber body. The upper connecting seat, the lower connecting seat, and the intermediate support cylinder are all made of metal. The upper connecting seat, the lower connecting seat, and the intermediate support cylinder are integrally formed by a vulcanization process. The conical rubber body has a stepped conical structure. The conical rubber body is divided into a first conical segment, a second conical segment, and a third conical segment from bottom to top along the axial direction. The cone angle of each conical segment gradually increases, and the conical segments are connected by arc transitions.

[0006] Preferably, the intermediate support cylinder is coaxially disposed inside the conical rubber body, and the outer wall of the intermediate support cylinder is provided with multiple annular grooves.

[0007] Preferably, the upper connecting seat is a disc-shaped structure, and the bottom of the upper connecting seat is provided with an annular boss. The annular boss is embedded in the top of the conical rubber body, and the outer wall of the annular boss is provided with anti-slip texture.

[0008] Preferably, the upper connecting seat has a mounting through hole at its center, and the inner wall of the mounting through hole is threaded.

[0009] Preferably, the lower connecting seat is an annular structure, with an annular wedge platform at the top and an annular wedge groove at the bottom of the conical rubber body, and the annular wedge platform fitting into the annular wedge groove.

[0010] Preferably, the bottom of the lower connecting seat is provided with a plurality of positioning pin holes, which are arranged circumferentially at equal intervals.

[0011] The beneficial effects of this utility model are as follows: 1. The conical rubber body adopts a three-section design with the cone angle gradually increasing from bottom to top, combined with the arc transition between each section, so that the rubber stack forms differentiated stiffness characteristics in the vertical, horizontal and shear directions. Compared with the traditional uniform cross-section structure, it can simultaneously meet the diverse requirements of rail transit vehicles for stiffness in different directions, effectively solve the problem of single elastic parameters, and improve the stability and smoothness of vehicle operation. 2. The conical rubber body is integrally formed with the upper connecting seat, lower connecting seat and intermediate support cylinder through vulcanization process, which has strong overall structure and avoids detachment or loosening during use. The annular groove on the outer wall of the intermediate support cylinder, the anti-slip textured annular protrusion on the upper connecting seat, the annular wedge on the lower connecting seat and the conical rubber body are adapted to each other, which increases the contact area and bonding force between metal and rubber, further improving the load-bearing capacity and service life of the overall structure. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of a series suspended conical rubber stack proposed in this utility model; Figure 2 A schematic diagram of the three-dimensional structure of the conical rubber body; Figure 3 A schematic diagram of the three-dimensional cross-sectional structure of the conical rubber body and the intermediate support cylinder; Figure 4 This is a three-dimensional structural diagram of the upper connecting seat; Figure 5 This is a frontal three-dimensional structural diagram of the lower connector; Figure 6 This is a bottom-view three-dimensional structural diagram of the lower connecting seat.

[0013] In the figure: 1 Upper connecting seat, 2 Lower connecting seat, 3 Intermediate support cylinder, 4 Conical rubber body, 401 First conical section, 402 Second conical section, 403 Third conical section, 5 Annular groove, 6 Annular boss, 7 Annular wedge, 8 Annular wedge groove, 9 Positioning pin hole. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figures 1-2 A series of suspended conical rubber stacks includes an upper connecting seat 1, a lower connecting seat 2, an intermediate support cylinder 3, and a conical rubber body 4. The upper connecting seat 1, the lower connecting seat 2, and the intermediate support cylinder 3 are all made of metal. The upper connecting seat 1, the lower connecting seat 2, and the intermediate support cylinder 3 are integrally formed by a vulcanization process. The conical rubber body 4 has a stepped conical structure. The conical rubber body 4 is divided into a first conical segment 401, a second conical segment 402, and a third conical segment 403 along the axial direction from bottom to top. The cone angle of each conical segment 401, the second conical segment 402, and the third conical segment 403 gradually increases. The conical segments 401, the second conical segment 402, and the third conical segment 403 are connected by a circular arc transition.

[0016] The upper connecting seat 1 and the lower connecting seat 2 serve as connecting components between the rubber stack and the bogie frame and axle box of the EMU. The metal material ensures the connection strength and load-bearing capacity. The intermediate support cylinder 3 is coaxially set inside the conical rubber body 4 to enhance the overall structural rigidity of the rubber stack and avoid excessive deformation. The conical rubber body 4 is the core component that provides elastic support. The stepped conical structure achieves multi-dimensional stiffness characteristics through the difference in cone angle. The vulcanization process makes the conical rubber body 4 and the metal components integrally molded, with strong structural integrity, avoiding detachment or loosening during use. The cone angle design that gradually increases from bottom to top makes the first conical section 401 have greater stiffness and the third conical section 403 have relatively moderate stiffness. With the force feedback in the lateral and shear directions, it can simultaneously meet the multi-dimensional mechanical requirements of vertical, lateral and shear resistance. The arc transition reduces the stress concentration at the connection of each conical section, improves the fatigue resistance of the rubber stack, and extends its service life.

[0017] Reference Figure 3 The intermediate support cylinder 3 is coaxially set inside the conical rubber body 4. The outer wall of the intermediate support cylinder 3 is provided with multiple annular grooves 5. The coaxial installation of the intermediate support cylinder 3 can ensure that the rubber stack is subjected to uniform force and avoid eccentric deformation. Its metal material provides internal support for the conical rubber body 4 and limits excessive compression. The annular grooves 5 on the outer wall increase the contact area between the intermediate support cylinder 3 and the conical rubber body 4, and at the same time enhance the mechanical interlocking force between the two, making the bond after vulcanization more firm, avoiding relative slippage, and further improving the load-bearing capacity and stability of the overall structure.

[0018] Reference Figure 4The upper connecting seat 1 has a disc-shaped structure. The bottom of the upper connecting seat 1 is provided with an annular boss 6, which is embedded in the top of the conical rubber body 4. The outer wall of the annular boss 6 is provided with anti-slip texture. The center of the upper connecting seat 1 is provided with a mounting through hole, and the inner wall of the mounting through hole is provided with threads. The disc-shaped upper connecting seat 1 increases the contact area with the bogie frame to ensure a smooth connection. The annular boss 6 is embedded in the conical rubber body 4 to extend the bonding length between the metal and the rubber, thereby improving the reliability of the connection. The anti-slip texture further enhances the friction between the annular boss 6 and the rubber, preventing relative rotation. The central threaded mounting through hole facilitates the quick fixing of the rubber stack to the bogie frame with bolts, making installation convenient and the connection firm.

[0019] Reference Figures 5-6 The lower connecting seat 2 has a ring structure. The top of the lower connecting seat 2 is provided with a ring wedge 7, and the bottom of the conical rubber body 4 is provided with a ring wedge groove 8. The ring wedge 7 fits into the ring wedge groove 8. The bottom of the lower connecting seat 2 is provided with multiple positioning pin holes 9, which are arranged equidistantly around the circumference. The ring structure of the lower connecting seat 2 fits into the axle box mounting surface, reducing the overall weight while ensuring load-bearing capacity. The fit between the ring wedge 7 and the ring wedge groove 8 forms a wedge-shaped interlocking structure, increasing the bonding area and interlocking force, and improving the connection strength after vulcanization. The equidistantly arranged positioning pin holes 9 are used for precise positioning with the axle box, ensuring accurate installation of the rubber stack, avoiding displacement that leads to uneven force, and ensuring the stability of the EMU operation.

[0020] In this invention, the conical rubber body 4 is the core component providing elastic support. The stepped conical structure achieves multi-dimensional stiffness characteristics through differences in cone angles. The vulcanization process integrates the conical rubber body 4 with the metal components, resulting in a strong overall structure that prevents detachment or loosening during use. The cone angle design, which gradually increases from bottom to top, makes the first conical segment 401 have greater stiffness and the third conical segment 403 have relatively moderate stiffness. Combined with the force feedback in the lateral and shear directions, it can simultaneously meet the multi-dimensional mechanical requirements of vertical, lateral, and shear resistance. The rounded transition reduces stress concentration at the connection points of each conical segment, improves the fatigue resistance of the rubber stack, and extends its service life.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A series suspended conical rubber stack, comprising an upper connecting seat (1), a lower connecting seat (2), an intermediate support cylinder (3), and a conical rubber body (4), characterized in that, The upper connecting seat (1), the lower connecting seat (2) and the middle support cylinder (3) are all made of metal. The upper connecting seat (1), the lower connecting seat (2) and the middle support cylinder (3) are integrally formed by vulcanization process. The conical rubber body (4) is a stepped conical structure. The conical rubber body (4) is divided into a first conical segment (401), a second conical segment (402) and a third conical segment (403) from bottom to top along the axial direction. The cone angle of each conical segment (401), the second conical segment (402) and the third conical segment (403) gradually increases. The conical segments (401), the second conical segment (402) and the third conical segment (403) are connected by a circular arc.

2. The first-stage suspended conical rubber stack according to claim 1, characterized in that, The intermediate support cylinder (3) is coaxially arranged inside the conical rubber body (4), and the outer wall of the intermediate support cylinder (3) is provided with multiple annular grooves (5).

3. The first-stage suspended conical rubber stack according to claim 1, characterized in that, The upper connecting seat (1) is a disc-shaped structure. The bottom of the upper connecting seat (1) is provided with an annular boss (6). The annular boss (6) is embedded in the top of the conical rubber body (4). The outer wall of the annular boss (6) is provided with anti-slip texture.

4. The first-stage suspended conical rubber stack according to claim 3, characterized in that, The upper connecting seat (1) has a mounting through hole at its center, and the inner wall of the mounting through hole is threaded.

5. A series suspended conical rubber stack according to claim 1, characterized in that, The lower connecting seat (2) is a ring structure. The top of the lower connecting seat (2) is provided with a ring wedge (7), and the bottom of the conical rubber body (4) is provided with a ring wedge groove (8). The ring wedge (7) fits into the ring wedge groove (8).

6. A series suspended conical rubber stack according to claim 5, characterized in that, The bottom of the lower connecting seat (2) is provided with multiple positioning pin holes (9), and the multiple positioning pin holes (9) are arranged equidistantly around the circumference.

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