Radial extrusion device for automobile air spring leather bag protection sleeve

Abstract

The utility model discloses a radial extrusion device for an automobile air spring leather bag protection sleeve. The radial extrusion device is provided with a circular-ring-shaped die holder, a radial push-pull oil cylinder, an extrusion module assembly and a hydraulic control system, a group of radial through holes are uniformly formed in the circular-ring-shaped die holder in the circumferential direction, and radial push-pull oil cylinders are arranged in the radial through holes; a piston rod of the radial push-pull oil cylinder extends out of the inner side wall of the annular die holder, and the extending end of the piston rod is fixedly assembled with the extrusion module assembly; the hydraulic control system comprises a hydraulic pump, an oil tank, a two-position four-way reversing valve and a common rail oil cavity, a liquid inlet pipeline of the hydraulic pump is inserted into the oil tank, a liquid outlet pipeline of the hydraulic pump is communicated with the common rail oil cavity, and the common rail oil cavity is communicated with a first oil inlet and a first oil outlet of each radial push-pull oil cylinder through a set of pipelines. And the two-position four-way reversing valve is arranged on a liquid outlet pipeline of the hydraulic pump and a pipeline communicated with a second oil inlet / outlet of the radial push-pull oil cylinder. According to the utility model, the problem of mutual interference of components in the automobile air spring mounting equipment is avoided, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile accessories, in particular to a radial extrusion device for a protection sleeve of an air spring bag of an automobile air spring. BACKGROUND

[0002] As shown in a kind of automobile air spring 1 in the accompanying drawings, Figure 1 Metal protection sleeve 1-2 is arranged outside the air spring bag 1-1 of the automobile air spring 1, one end of metal protection sleeve 1-2 is clamped together with the air spring bag 1-1 through the internal support ring 1-3 of the automobile air spring 1, when replacing the air spring bag 1-1, first, the upper end of the new air spring bag 1-1 is fixedly connected with the upper cover part 1-4 of the cavity of the automobile air spring 1, and the lower end is fixedly connected with the sleeve piston 1-5 of the shock absorber in the automobile air spring 1, then metal protection sleeve 1-2 is clamped and assembled with air spring bag 1-1, and then air spring bag 1-1 is compressed to be curled in the cavity of the air spring. In the above-mentioned air spring bag 1-1 replacement operation process, when clamping and operating metal protection sleeve 1-2 and air spring bag 1-1, radial extrusion is needed on metal protection sleeve 1-2 at the position corresponding to internal support ring 1-3, and air spring bag 1-1 is tightly fixed by the cooperation of the radial contraction of metal protection sleeve 1-2 and internal support ring 1-3.

[0003] In the prior art, the radial extrusion of metal protection sleeve 1-2 is driven by the vertical movement of a wedge block arranged below the workpiece, and then the radial extrusion of metal protection sleeve is driven by the wedge block. Since the integrated automobile air spring installation equipment (i.e. the equipment integrating the two processes of assembling the metal protection sleeve and the air spring bag of the automobile air spring and compressing the air spring bag) is provided with a lifting platform and a lifting platform driving mechanism, the radial extrusion of metal protection sleeve by the vertical movement of the wedge block driven by the cylinder exists the problem of mutual interference of the components in the automobile air spring installation equipment. To solve this problem, the height of the workbench needs to be improved, which brings inconvenience to the operator's feeding and discharging operation, thereby affecting the work efficiency. UTILITY MODEL CONTENTS

[0004] The utility model provides a radial extrusion device for a protection sleeve of an air spring bag of an automobile air spring, which uniformly sets a group of radial push-pull oil cylinders in a circular ring-shaped die holder, moves the extrusion module assembly by the radial push-pull oil cylinders, controls the synchronous action of the push-pull oil cylinders by a hydraulic control system, realizes the radial extrusion of metal protection sleeve by the extrusion module assembly, avoids the mutual interference of the components in the automobile air spring installation equipment, and improves the work efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A radial extrusion device for a protective sleeve of an automotive air spring bladder includes an annular mold base, radial push-pull cylinders, an extrusion module assembly, and a hydraulic control system. The annular mold base has a set of radial through holes evenly distributed circumferentially, and the radial push-pull cylinders are installed within these holes. The piston rod of the radial push-pull cylinder extends from the inner wall of the annular mold base, and the extended end of the piston rod is fixedly assembled with the extrusion module assembly. The hydraulic control system includes a hydraulic pump, an oil tank, a two-position four-way directional valve, and a common rail oil chamber. The hydraulic pump inlet pipe is inserted into the oil tank, and the hydraulic pump outlet pipe is connected to the common rail oil chamber. The common rail oil chamber is connected to the first inlet and outlet ports of each radial push-pull cylinder via a set of pipes. The two-position four-way directional valve is arranged on the hydraulic pump outlet pipe and the pipe connecting to the second inlet and outlet ports of the radial push-pull cylinders.

[0007] The aforementioned radial extrusion device for the protective sleeve of the automotive air spring bladder has a one-way valve installed on the hydraulic pump outlet line.

[0008] The aforementioned radial extrusion device for the protective sleeve of the automotive air spring bladder has an overflow valve installed on the hydraulic pump outlet line.

[0009] In the aforementioned radial extrusion device for the protective sleeve of an automotive air spring bladder, both the two-position four-way reversing valve and the overflow valve are electromagnetic control valves.

[0010] The aforementioned radial extrusion device for the protective sleeve of the automotive air spring bladder has an extrusion working surface in the extrusion module assembly. The extrusion working surface is a circular arc surface. When the piston rod of the radial push-pull cylinder is extended, the extrusion working surfaces of all the extrusion module assemblies surround and form a cylindrical surface concentric with the internal support ring of the automotive air spring.

[0011] The aforementioned radial extrusion device for the protective sleeve of an automotive air spring bladder has a radial push-pull cylinder embedded in the radial through hole of an annular mold base. A sealing cover plate is provided at the outer end of the radial push-pull cylinder, and the sealing cover plate is assembled to the outer wall of the annular mold base by bolts.

[0012] This utility model provides a radial extrusion device for a protective sleeve of an automotive air spring bladder. It consists of a set of radial push-pull cylinders evenly arranged in a circular mold base. The radial push-pull cylinders can drive the extrusion module assembly to move, and the hydraulic control system controls the synchronous movement of the push-pull cylinders. This not only realizes the radial extrusion effect of the extrusion module assembly on the metal protective sleeve, but also avoids the problem of mutual interference between components in automotive air spring installation equipment. It also makes it easier for the operator to complete the loading and unloading of workpieces, thereby improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a cross-sectional structure of an automotive air spring according to a specific embodiment of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of this utility model;

[0015] Figure 3 This is a top view of the assembly of the annular mold base, radial push-pull cylinder, and extrusion module components.

[0016] Figure 4 This is a schematic diagram illustrating the working principle of the hydraulic control system of this utility model to realize the radial extrusion process;

[0017] Figure 5 This is a schematic diagram illustrating the working principle of the hydraulic control system of this utility model in the process of releasing radial compression.

[0018] Figure 6 This is a schematic diagram of the actions of the radial push-pull cylinder and the extrusion module assembly during the radial extrusion process.

[0019] Explanation of each label in the diagram:

[0020] 1 is the car air spring, 1-1 is the bladder, 1-2 is the metal protective sleeve, 1-3 is the internal support ring, 1-4 is the upper cover of the cavity, and 1-5 is the sleeve piston of the shock absorber.

[0021] 2 is a circular mold base;

[0022] 3 is a radial push-pull hydraulic cylinder, 3-1 is the first oil inlet / outlet, and 3-2 is the second oil inlet / outlet;

[0023] 4 represents the extrusion module assembly;

[0024] 5 is the common rail oil chamber;

[0025] 6 is a two-position four-way directional valve;

[0026] 7 is a check valve;

[0027] 8 is the overflow valve;

[0028] 9 represents a hydraulic pump;

[0029] 10 is the fuel tank;

[0030] 11 is the sealing cover plate. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Referring to Figure 1, a preferred embodiment of this utility model relates to an automotive air spring 1. A metal protective sleeve 1-2 is provided on the outside of the air spring 1's bladder 1-1. One end of the metal protective sleeve 1-2 is fastened to the air spring 1-1 through the internal support ring 1-3 of the automotive air spring 1. When replacing the air spring 1-1, the upper end of the new air spring 1-1 is first fixedly connected to the upper cover part 1-4 of the cavity of the automotive air spring 1, and the lower end is fixedly connected to the sleeve piston 1-5 of the shock absorber in the automotive air spring 1. Then, the metal protective sleeve 1-2 is fastened to the air spring 1-1, and the air spring 1-1 is compressed so that it is rolled up in the cavity of the air spring. During the replacement of the aforementioned bladder 1-1, when the metal protective sleeve 1-2 is clamped onto the bladder 1-1, the metal protective sleeve 1-2 needs to be radially compressed at the position corresponding to the internal support ring 1-3. The radial contraction of the metal protective sleeve 1-2, in conjunction with the internal support ring 1-3, will press and fix the bladder 1-1.

[0033] See Figure 2 , Figure 3 This utility model provides a radial extrusion device for a protective sleeve of an automotive air spring bladder. It comprises an annular mold base 2, radial push-pull cylinders 3, an extrusion module assembly 4, and a hydraulic control system. The annular mold base 2 has a set of radial through holes evenly arranged circumferentially. Radial push-pull cylinders 3 are installed in these radial through holes. In a preferred embodiment, eight radial through holes are evenly opened circumferentially on the annular mold base 2, and eight radial push-pull cylinders 3 are embedded in these holes. A sealing cover plate 11 is provided at the outer end of each radial push-pull cylinder 3, and the sealing cover plate 11 is bolted to the outer wall of the annular mold base 2. The piston rod of the radial push-pull cylinder 3 extends from the inner wall of the annular mold base, and the extended end of the piston rod is fixedly assembled with the extrusion module assembly 4.

[0034] See Figure 2 The radial compression device for the protective sleeve of the automotive air spring bladder described in this utility model has a hydraulic control system including a hydraulic pump 9, an oil tank 10, a two-position four-way directional valve 6, a common rail oil chamber 5, a check valve 7, and an overflow valve 8. The inlet pipe of the hydraulic pump 9 is inserted into the oil tank 10, and the outlet pipe of the hydraulic pump 9 is connected to the common rail oil chamber 5. The common rail oil chamber 5 is connected to the first inlet and outlet ports 4-1 of each radial push-pull cylinder 4 through a set of pipes. The two-position four-way directional valve 6 is arranged on the outlet pipe of the hydraulic pump and the pipe connecting to the second inlet and outlet ports 4-2 of the radial push-pull cylinder. The check valve 7 and the overflow valve 8 are arranged on the outlet pipe of the hydraulic pump 9. Both the two-position four-way directional valve 6 and the overflow valve 8 are electromagnetic control valves.

[0035] See Figure 4 , Figure 5 , Figure 6The radial extrusion device for the protective sleeve of the automotive air spring bladder described in this utility model works as follows: when the two-position four-way directional valve 6 in the hydraulic control system is in the first working position (i.e. Figure 4 As shown, the two-position four-way directional valve 6 (left position) has hydraulic oil flowing through the common rail oil chamber 5 to the first inlet / outlet 3-1 of each radial push-pull cylinder 3. The piston rod of the radial push-pull cylinder 3 extends synchronously, driving the extrusion module assembly 4 to converge inward (as shown). Figure 6 As shown), the extrusion working surfaces of all extrusion module components 4 enclose a cylindrical surface concentric with the inner support ring 1-3 of the automotive air spring 1, radially extruding the metal protective sleeve 1-2 and cooperating with the inner support ring 1-3 to press and fix the bladder 1-1; when the two-position four-way directional valve 6 in the hydraulic control system is in the second working position (i.e. Figure 5 As shown, the two-position four-way directional valve 6 (right position) is used. The hydraulic oil flows to the second inlet / outlet port 3-2 of each radial push-pull cylinder 3. The piston rod of the radial push-pull cylinder 3 retracts, driving the extrusion module assembly 4 to move outward, releasing the extrusion effect on the metal protective sleeve 1-2 and avoiding the workpiece loading / unloading space channel.

Claims

1. A radial compression device for a protective sleeve of an automotive air spring bladder, characterized in that: The device is equipped with a circular mold base (2), a radial push-pull cylinder (3), an extrusion module assembly (4), and a hydraulic control system. The circular mold base (2) has a set of radial through holes evenly arranged along the circumference, and the radial push-pull cylinder (3) is arranged in the radial through holes. The piston rod of the radial push-pull cylinder (3) extends from the inner side wall of the circular mold base, and the extended end of the piston rod is fixedly assembled with the extrusion module assembly (4). The hydraulic control system includes a hydraulic pump (9), an oil tank (10), a two-position four-way reversing valve (6), and a common rail oil chamber (5). The inlet pipe of the hydraulic pump (9) is inserted into the oil tank (10), and the outlet pipe of the hydraulic pump (9) is connected to the common rail oil chamber (5). The common rail oil chamber (5) is connected to the first inlet and outlet ports (3-1) of each radial push-pull cylinder (3) through a set of pipes. The two-position four-way reversing valve (6) is arranged on the outlet pipe of the hydraulic pump and the pipe connecting the second inlet and outlet ports (4-2) of the radial push-pull cylinder.

2. The radial compression device for the protective sleeve of an automotive air spring bladder according to claim 1, characterized in that: A check valve (7) is installed on the outlet pipe of the hydraulic pump (9).

3. The radial extrusion device for the protective sleeve of an automotive air spring bladder according to claim 2, characterized in that: An overflow valve (8) is installed on the outlet pipe of the hydraulic pump.

4. The radial extrusion device for the protective sleeve of an automotive air spring bladder according to claim 3, characterized in that: Both the two-position four-way directional valve (6) and the relief valve (8) are electromagnetic control valves.

5. The radial compression device for the protective sleeve of an automotive air spring bladder according to any one of claims 1 to 4, characterized in that: The extrusion module assembly (4) is provided with an extrusion working surface, which is a circular arc surface. When the piston rod of the radial push-pull cylinder (3) is extended, the extrusion working surfaces of all the extrusion module assemblies are enclosed to form a cylindrical surface concentric with the internal support ring (1-3) of the automobile air spring (1).

6. The radial extrusion device for the protective sleeve of an automotive air spring bladder according to claim 5, characterized in that: The radial push-pull cylinder (3) is embedded in the radial through hole of the annular mold base (2). A sealing cover plate (11) is provided at the outer end of the radial push-pull cylinder (3). The sealing cover plate (11) is assembled with the outer wall of the annular mold base (2) by bolts.

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