A special installation tool for heavy truck metal bellows

Abstract

The utility model relates to a kind of installation tools special for heavy truck metal bellows, solve the problem such as axis misalignment, distortion in traditional assembly mode.It includes flange fixed component (1), intermediate support frame (2) and adjusting mechanism (3), multiple intermediate support frame (2) is connected between the flange fixed component (1) of both ends, intermediate support frame (2) is length telescopic structure, adjusting mechanism (3) is installed on intermediate support frame (2), the position of flange fixed component (1) of two ends is fine adjusted.The utility model changes flexible structure into rigid structure for assembly, and length is adjustable, convenient to dismount and mount.This kind of deformation belongs to temporary change, after removing special tool after assembly is completed, metal bellows restores flexibility again, greatly reduces the time of manual adjustment of assembly personnel, improves assembly efficiency.Not only suitable for the assembly of heavy truck metal bellows, but also can be popularized to other similar flexible component high-precision assembly scene, can adapt to the flexible component demand of different sizes and shapes.

Description

Technical Field

[0001] This utility model relates to an installation tool, specifically a special installation tool for heavy-duty truck metal corrugated pipes. Background Technology

[0002] In heavy-duty truck design, metal bellows serve as a crucial flexible component of the exhaust system, absorbing engine vibration and displacement. However, during actual assembly, dimensional errors or improper assembly often lead to misalignment of the flange axes at both ends of the metal bellows, causing pipe twisting. During vehicle operation, this misalignment exceeds its maximum permissible value P. max， See Figure 1 This leads to problems such as shortened service life, cracking, and smoke leakage.

[0003] Currently, there is no high-precision assembly fixture specifically designed for metal bellows in the industry. Traditional assembly methods mainly rely on manual operation, which makes it difficult to guarantee alignment accuracy. Therefore, there is an urgent need for a specialized fixture that can fix metal bellows and ensure precise alignment of its flanges at both ends. Utility Model Content

[0004] The purpose of this utility model is to provide a special tooling fixture for heavy-duty truck metal bellows, which transforms the metal bellows into a rigid structure to achieve high-precision assembly, thereby solving problems such as misalignment and twisting of the central axis in traditional assembly methods.

[0005] This utility model is achieved through the following technical solution:

[0006] A special installation tool for heavy-duty truck metal bellows includes a flange fixing assembly 1, an intermediate support frame 2, and an adjustment mechanism 3. Multiple intermediate support frames 2 are connected between two flange fixing assemblies 1 at both ends. The multiple intermediate support frames 2 are telescopic structures. The adjustment mechanism 3 is mounted on the intermediate support frame 2 to finely adjust the position of the flange fixing assemblies 1 at both ends.

[0007] Furthermore, the flange fixing assembly 1 consists of two semi-circular clamps 101. One end of the clamp 101 is connected through the hinge fixing seat 102, which can realize semi-circular opening and closing; the other end is connected to the lock 104. Each clamp 101 has a flexible anti-slip pad 103 on its inner side.

[0008] Furthermore, the intermediate support frame 2 includes an outer tube 201 and an inner liner tube 202. The hinge fixing seat 102 for installing the intermediate support frame 2 is welded to the semi-circular clamp 101. One end of the outer tube 201 and the inner liner tube 202 respectively passes through the hinge fixing seat 102, and the ends are designed with threaded structures and are fixed with cap nuts 203. The intermediate inner liner tube 202 is inserted into the outer tube 201, which can realize sliding adjustment.

[0009] Furthermore, the adjustment mechanism 3 has slots near the threaded ends of the outer tube 201 and the inner tube 202, respectively, and places spring pins 301. The tension spring 303 passes through the inside of the outer tube 201 and the inner tube 202, and is fixed at both ends to the spring pins 301. The tension spring 303 is tightened. The inner tube 202 is equipped with a micro-nut 302, which can push the outer tube 201 out through the micro-nut 302.

[0010] Furthermore, an observation port is designed at the rear end of the outer tube 201, and the outer wall of the tube is marked with a scale. When adjusting the micro nut 302, the scale value at the end of the inner liner tube 202 can be seen through the observation port.

[0011] The special tool described in this invention transforms a flexible structure into a rigid structure for assembly, and its length is adjustable and disassembly / reassembly is convenient. This deformation is temporary; after assembly and removal of the special tool, the metal corrugated pipe regains its flexibility, greatly reducing the time required for manual adjustment by assembly personnel and improving assembly efficiency.

[0012] This method is not only applicable to the assembly of heavy-duty truck bellows, but can also be extended to other high-precision assembly scenarios for similar flexible components. Its design principles and structure can be further optimized to adapt to the needs of flexible components of different sizes and shapes. Attached Figure Description

[0013] Figure 1 Schematic diagram of metal bellows deformation;

[0014] Figure 2 Overall structural diagram of this utility model;

[0015] Figure 3 Flange fixing assembly structural diagram;

[0016] Figure 4 Intermediate support frame structure diagram;

[0017] Figure 5 Structural diagram of the regulating mechanism;

[0018] Figure 6 Assembly rendering. Detailed Implementation

[0019] like Figure 2-6 As shown, this utility model is a special installation tool for heavy-duty truck metal corrugated pipes, and adopts the following technical solution:

[0020] 1. Overall design of tooling and fixtures

[0021] This specialized tooling fixture includes two flange fixing assemblies 1, three intermediate support frames 2, and an adjustment mechanism 3. The flange fixing assemblies 1 are used to fix the inlet and outlet flanges of the metal bellows, respectively; the intermediate support frames 2 provide overall support to ensure the stability of the tooling fixture during assembly; and the adjustment mechanism 3 is used to fine-tune the position of the flanges at both ends to achieve precise alignment.

[0022] 2. Flange fixing assembly

[0023] The flange fixing assembly consists of two semi-circular clamps 101, which can respectively clamp the flanges at both ends of the metal bellows. The clamps 101 are connected by hinge fixing seats 102, which can realize semi-circular opening and closing. After clamping both ends of the metal bellows, the clamps 101 are fixed by locking buckles 104. Each clamp 101 has a flexible anti-slip pad 103 on its inner side, which ensures that the locking buckle 104 tightens the clamp while preventing damage to the flange surface and ensuring the concentricity of the flange and the tooling fixture.

[0024] 3. Intermediate support frame

[0025] The intermediate support frame hinge fixing seat 102 is welded to the semi-circular clamp 101. One end of the outer tube 201 and the inner liner tube 202 respectively passes through the hinge fixing seat 102, and the ends are designed with threaded structures and are fixed with cap nuts 203. The intermediate inner liner tube 202 is inserted into the outer tube 201, which can be adjusted by sliding. The three support tubes ensure the stability of the overall structure and are axially adjustable to accommodate metal corrugated pipes of different lengths.

[0026] 4. Adjustment mechanism

[0027] The adjustment mechanism is based on the telescopic structure of the intermediate support frame. Slots are cut near the threaded ends of the outer tube 201 and the inner liner tube 202 to accommodate spring pins 301. A tension spring 303 passes through the interior of both the outer tube 201 and the inner liner tube 202, with both ends fixed to the spring pins 301. When the tension spring 303 is tightened and the inner liner tube 202 is fully inserted into the outer tube 201, the fitting metal bellows is at its shortest length. A fine-tuning nut 302 is installed on the inner liner tube 202, allowing the outer tube 201 to be pushed out using the fine-tuning nut 302, thereby adjusting the length.

[0028] An observation port is designed at the rear end of the outer sleeve 201, and the outer wall of the sleeve is marked with a scale. When adjusting the micro nut 302, the scale value at the end of the inner liner 202 can be seen through the observation port, ensuring that the height of the three support tubes is consistent, thereby ensuring that the parallelism of the flange surfaces at both ends of the clamped metal bellows is consistent.

[0029] 5. Flexible-to-rigidity function

[0030] During assembly, the center distance of the metal bellows is adjusted to fit the length of the metal bellows by adjusting the micro-distance nut. The metal bellows is then clamped by the flange fixing components at both ends and locked with latches, transforming the metal bellows into a rigid structure. At this point, the metal bellows loses its original flexibility and can maintain precise axial alignment under external forces. Assembly and disassembly can be achieved simply by opening and closing the latches, greatly improving assembly efficiency.

[0031] Compared with the prior art, the present invention has the following significant advantages:

[0032] 1. Improved the assembly accuracy of the flanges at both ends of the metal bellows, avoiding torsion and reduced vibration absorption capacity caused by misalignment of the axis.

[0033] 2. It enables rigid assembly of flexible components, reduces human error, and improves assembly efficiency.

[0034] 3. By using the micro-distance nut adjustment mechanism, the two ends are kept parallel according to the height value of the observation port scale line, thus achieving high-precision micro-distance adjustment.

[0035] 4. With its simple structure and ease of operation, it is not only suitable for the assembly of heavy-duty truck metal bellows, but can also be extended to other high-precision assembly scenarios of similar flexible components.

Claims

1. A special installation tool for heavy truck metal bellows, characterized in that: It includes a flange fixing assembly (1), an intermediate support frame (2) and an adjustment mechanism (3). Multiple intermediate support frames (2) are connected between two flange fixing assemblies (1) at both ends. The intermediate support frame (2) is a telescopic structure. The adjustment mechanism (3) is mounted on the intermediate support frame (2) to finely adjust the position of the flange fixing assemblies (1) at both ends.

2. The heavy truck metal bellows special installation tool according to claim 1, characterized in that: The intermediate support frame (2) consists of three evenly distributed components.

3. The mounting tool for heavy truck metal bellows according to claim 1, characterized in that: The flange fixing assembly (1) consists of two semi-circular clamps (101). One end of the clamp (101) is connected through a hinge fixing seat (102) to achieve semi-circular opening and closing; the other end is connected to a lock (104) to achieve locking.

4. The heavy truck metal bellows special installation tool according to claim 3, characterized in that: Each clamp (101) has a flexible anti-slip pad (103) on its inner side.

5. The heavy truck metal bellows special installation tool of claim 1, wherein: The intermediate support frame (2) includes an outer tube (201) and an inner liner tube (202). The hinge fixing seat (102) for installing the intermediate support frame (2) is welded to the semi-circular clamp (101). One end of the outer tube (201) and the inner liner tube (202) respectively passes through the hinge fixing seat (102). The ends are designed with threaded structures and are fixed with cap nuts (203). The intermediate inner liner tube (202) is inserted into the outer tube (201) to achieve sliding adjustment.

6. The special installation tool for heavy-duty truck metal bellows according to claim 1, characterized in that: The adjustment mechanism (3) has slots made near the threaded ends of the outer tube (201) and the inner tube (202) respectively, and a spring pin (301) is placed there. The tension spring (303) passes through the inside of the outer tube (201) and the inner tube (202) and is fixed at both ends on the spring pin (301). The inner tube (202) is equipped with a micro nut (302), which can push out the outer tube (201) through the micro nut (302).

7. The heavy truck metal bellows special installation tool according to claim 6, characterized in that: An observation port is designed at the rear end of the outer tube (201), and the outer wall of the tube is marked with a scale. When adjusting the micro nut (302), the scale value at the end of the inner liner tube (202) can be seen through the observation port.

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