High-wave-pitch metal corrugated pipe for bullet train

Abstract

The utility model relates to the field of corrugated pipes, and discloses a high-wave-pitch metal corrugated pipe for a bullet train, which comprises a long corrugated pipe, a short corrugated pipe is arranged at one end of the long corrugated pipe, a connecting cylinder is fixedly connected to one end of the long corrugated pipe, a fixing cylinder is fixedly connected to one end of the short corrugated pipe, a butt joint groove is formed in one end of the connecting cylinder, and a butt joint groove is formed in the other end of the connecting cylinder. According to the high-wave-pitch metal corrugated pipe for the bullet train, the butt joint ring at one end of the fixing cylinder is inserted into the butt joint groove in the connecting cylinder, in the process, the clamping column enters the special-shaped clamping groove and then rotates by a certain angle, the clamping column is clamped into the tail end of the special-shaped clamping groove, at the moment, the spring in the butt joint groove is compressed, and the butt joint ring is inserted into the butt joint groove in the connecting cylinder. When the metal corrugated pipe is connected, outward force is applied to the butt joint ring in cooperation with the fastening ring, the clamping column abuts against the interior of the special-shaped clamping groove, connection of the corrugated pipe can be completed without using a metal fastening connecting piece, and the problem that follow-up disassembly and overhaul are affected due to the fact that metal bolts at the connecting position of an existing metal corrugated pipe are prone to rusting is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows, in particular to a high-pitch metal bellows for motor vehicles. Background Art

[0002] Metal bellows is a pipe with a regular wave shape. Commonly used metal bellows include carbon steel, stainless steel, steel lined with plastic, aluminum, etc. They are mainly used for non-concentric axial transmission with a small bending radius, or irregular turning, expansion, or absorbing thermal deformation of pipes, or for connecting pipes to pipes or pipes to equipment in situations where it is not convenient to install with fixed elbows. High-pitch metal bellows are often used on EMUs.

[0003] The patent with publication number CN 214008423 U discloses a high-pitch metal bellows for motor vehicles, which includes a main pile, symmetrically distributed washers are fixedly connected to both sides of the main pile, a circular hole is opened inside the main pile, and a valve core is movably connected to the inner wall of the circular hole, a shaft is fixedly connected to the outside of the valve core, and a turntable is fixedly connected to the top of the shaft. The device is ensured to ensure the sealing of the bellows without destroying the integrity of the bellows by opening symmetrically distributed second annular grooves at both ends of the outside of the long-wave tube and movably connecting a limiting member on the outside of the second annular groove, which facilitates the operator to quickly install and disassemble. However The device has a main pile and a gasket pre-installed in the first annular groove, and then the annular groove on one side of the limit piece is snapped into the second annular groove, and a series of structures such as a fixing nut and a pressing plate are used to connect the short-wave tube and the long-wave tube together. However, this connection method of the bellows still requires the use of a metal connector such as a fixing nut, and there is still a risk of rusting of the fixing nut after using the bellows for a long time, thereby affecting subsequent disassembly, maintenance, replacement and other operations. For this reason, a high-pitch metal bellows for EMU is proposed to solve the problem that metal bolts at the connection of existing metal bellows are easily rusted, affecting subsequent disassembly and maintenance. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a high-pitch metal bellows for a motor vehicle, which solves the above-mentioned problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pitch metal bellows for a motor vehicle, comprising a long bellows, a short bellows is arranged at one end of the long bellows, a connecting tube is fixedly connected to one end of the long bellows, a fixing tube is fixedly connected to one end of the short bellows, a docking groove is provided at one end of the connecting tube, a docking ring is sleeved in the inner cavity of the docking groove, a spring is arranged in the inner cavity of the docking groove, a fastening ring is fixedly connected to one end of the spring, four special-shaped slots are evenly distributed on the outer ring of the connecting tube, a clamping column is arranged in the inner cavity of the special-shaped slot, and a fastening mechanism is arranged on the outer ring of the connecting tube.

[0008] Preferably, the docking ring is fixedly connected to the fixing tube, and the two ends of the spring are fixedly connected to the docking groove and the fastening ring respectively.

[0009] Preferably, the special-shaped clamping groove penetrates the outer wall of the connecting tube to the inner cavity of the docking groove, and the clamping column is fixedly connected to the docking ring.

[0010] Preferably, when the clamping column is located in the special-shaped clamping groove, the docking ring and the fastening ring are squeezed out, and the spring is in a compressed state.

[0011] Preferably, the fastening mechanism includes four fastening grooves formed on the outer ring of the connecting tube, the inner cavity of the fastening groove is slidably connected with an L-shaped fastening plate, and an arc groove is formed at one end of the L-shaped fastening plate close to the clamping column, and the arc groove has the same curvature as the outer curvature of the clamping column.

[0012] Preferably, a second spring is disposed in the inner cavity of the fastening groove, and two ends of the second spring are fixedly connected to the fastening groove and the L-shaped fastening plate respectively.

[0013] Preferably, a fastening cylinder is arranged outside the connecting cylinder, an inner ring of the fastening cylinder is arranged with an internal thread, and an outer ring of the connecting cylinder is arranged with an external thread.

[0014] (III) Beneficial effects

[0015] 1. The high-pitch metal bellows for the EMU is used. The docking ring at one end of the fixed tube is inserted into the docking groove in the connecting tube. During the process, the clamping column enters the special-shaped slot and rotates a certain angle to make the clamping column clamp into the end of the special-shaped slot. At this time, the spring in the docking slot is compressed, and the fastening ring applies an outward force to the docking ring to make the clamping column press against the special-shaped slot. The connection of the bellows can be completed without the use of metal fastening connectors, which solves the problem that the metal bolts at the connection of the existing metal bellows are easily corroded and affect the subsequent disassembly and maintenance.

[0016] 2. After the high-pitch metal bellows for EMUs is connected by clamping the docking ring with the docking groove in the connecting tube, the fastening tube is rotated to cooperate with the internal thread of the inner ring and the external thread outside the connecting tube, and the L-shaped fastening plate in the fastening groove is moved toward the clamping column to cooperate with the arc groove to squeeze and contact with it, thereby secondarily fixing the position of the clamping column, thereby improving the firmness of the high-pitch metal bellows for EMUs when connected and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the structural diagram of the utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structural connection tube of the utility model;

[0020] Figure 4 It is a schematic diagram of the structural fastening mechanism of the utility model.

[0021] In the figure: 1. long bellows; 2. short bellows; 3. connecting tube; 4. fixing tube; 5. docking groove; 6. docking ring; 7. spring; 8. fastening ring; 9. special-shaped slot; 10. clamping column; 11. fastening mechanism; 111. fastening groove; 112. L-shaped fastening plate; 113. arc groove; 114. second spring; 115. fastening tube; 116. internal thread; 117. external thread. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example: See Figure 1-4 A high-pitch metal bellows for a motor vehicle comprises a long bellows 1, a short bellows 2 is arranged at one end of the long bellows 1, a connecting tube 3 is fixedly connected to one end of the long bellows 1, a fixing tube 4 is fixedly connected to one end of the short bellows 2, a docking groove 5 is provided at one end of the connecting tube 3, a docking ring 6 is sleeved in the inner cavity of the docking groove 5, a spring 7 is arranged in the inner cavity of the docking groove 5, a fastening ring 8 is fixedly connected to one end of the spring 7, four special-shaped card grooves 9 are evenly distributed on the outer ring of the connecting tube 3, a card column 10 is arranged in the inner cavity of the special-shaped card groove 9, and a fastening mechanism 11 is arranged on the outer ring of the connecting tube 3.

[0024] Furthermore, the docking ring 6 is fixedly connected to the fixing tube 4 , and both ends of the spring 7 are fixedly connected to the docking groove 5 and the fastening ring 8 , respectively.

[0025] Furthermore, the special-shaped clamping groove 9 penetrates through the outer wall of the connecting tube 3 to the inner cavity of the docking groove 5 , and the clamping column 10 is fixedly connected to the docking ring 6 .

[0026] Furthermore, when the clamping column 10 is located in the special-shaped clamping groove 9, the docking ring 6 and the fastening ring 8 are squeezed out, and the spring 7 is in a compressed state, and the docking ring 6 at one end of the fixing tube 4 is inserted into the docking groove 5 in the connecting tube 3. During the process, the clamping column 10 enters the special-shaped clamping groove 9 and then rotates a certain angle, so that the clamping column 10 is stuck in the end of the special-shaped clamping groove 9. At this time, the spring 7 in the docking groove 5 is compressed, and the fastening ring 8 exerts an outward force on the docking ring 6, so that the clamping column 10 is against the special-shaped clamping groove 9. The connection of the corrugated pipe can be completed without the use of metal fastening connectors.

[0027] Furthermore, the fastening mechanism 11 includes four fastening grooves 111 opened on the outer circle of the connecting tube 3, and the inner cavity of the fastening groove 111 is slidably connected with an L-shaped fastening plate 112. The L-shaped fastening plate 112 is provided with an arc groove 113 at one end close to the clamping column 10, and the arc groove 113 has the same external curvature as the clamping column 10.

[0028] Furthermore, a second spring 114 is disposed in the inner cavity of the fastening groove 111 , and two ends of the second spring 114 are fixedly connected to the fastening groove 111 and the L-shaped fastening plate 112 , respectively.

[0029] Furthermore, a fastening cylinder 115 is provided on the outside of the connecting cylinder 3, and the inner ring of the fastening cylinder 115 is provided with an internal thread 116, and the outer ring of the connecting cylinder 3 is provided with an external thread 117. After the clamping column 10 is inserted into the end of the special-shaped clamping groove 9 to complete the connection of the bellows, the fastening cylinder 115 can be rotated to cooperate with the internal thread 116 of the inner ring and the external thread 117 on the outside of the connecting cylinder 3, and the L-shaped fastening plate 112 in the fastening groove 111 is moved toward the clamping column 10 to cooperate with the arc groove 113 to squeeze and contact it, so that the position of the clamping column 10 can be fixed for a second time, thereby improving the firmness of the high-pitch metal bellows for this motor vehicle when connected and used. Conversely, the fastening cylinder 115 is reset, and the second spring 114 is cooperated, and the L-shaped fastening plate 112 leaves the clamping column 10, and the bellows can be disassembled.

[0030] Working principle: When using this high-pitch metal bellows for EMUs, directly insert the docking ring 6 at one end of the fixed tube 4 on the short bellows 2 into the docking groove 5 in the connecting tube 3. During the process, the clamping column 10 enters the special-shaped clamping groove 9 and rotates a certain angle so that the clamping column 10 is clamped into the end of the special-shaped clamping groove 9. At this time, the spring 7 in the docking groove 5 is compressed, and the fastening ring 8 exerts an outward force on the docking ring 6, and then the clamping column 10 on the docking ring 6 is clamped in the special-shaped clamping groove 9. The connection of the bellows can be completed without the use of metal fastening connectors, which solves the problem that the metal bolts at the connection of the existing metal bellows are easily corroded and affect the subsequent disassembly and maintenance; on the contrary, push the short bellows 2 toward one end of the long bellows 1 and rotate it, and cooperate with the spring 7 Apply outward force to the docking ring 6, so that the clamping column 10 automatically detaches from the special-shaped clamping groove 9, which is convenient for the disassembly, separation, replacement and maintenance of the long bellows 1 and the short bellows 2; after the clamping column 10 is inserted into the end of the special-shaped clamping groove 9 to complete the connection of the bellows, the fastening cylinder 115 can be rotated to cooperate with the internal thread 116 of the inner ring and the external thread 117 on the outside of the connecting cylinder 3, and the L-shaped fastening plate 112 in the fastening groove 111 is moved toward the clamping column 10 to cooperate with the arc groove 113 to squeeze and contact it, so that the position of the clamping column 10 can be fixed for a second time, thereby improving the firmness of the high-pitch metal bellows for motor vehicles when connected and used; on the contrary, the fastening cylinder 115 is reset, and the second spring 114 is cooperated, and the L-shaped fastening plate 112 leaves the clamping column 10, and the bellows can be disassembled.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pitch metal bellows for a motor vehicle, comprising a long bellows (1), characterized in that: One end of the long corrugated tube (1) is provided with a short corrugated tube (2), one end of the long corrugated tube (1) is fixedly connected to a connecting tube (3), one end of the short corrugated tube (2) is fixedly connected to a fixing tube (4), one end of the connecting tube (3) is provided with a docking groove (5), the inner cavity of the docking groove (5) is sleeved with a docking ring (6), the inner cavity of the docking groove (5) is provided with a spring (7), one end of the spring (7) is fixedly connected to a fastening ring (8), the outer ring of the connecting tube (3) is evenly provided with four special-shaped grooves (9), the inner cavity of the special-shaped groove (9) is provided with a clamping column (10), and the outer ring of the connecting tube (3) is provided with a fastening mechanism (11).

2. The high-pitch metal bellows for motor vehicles according to claim 1, characterized in that: The docking ring (6) is fixedly connected to the fixing tube (4), and the two ends of the spring (7) are respectively fixedly connected to the docking groove (5) and the fastening ring (8).

3. The high-pitch metal bellows for motor vehicles according to claim 1, characterized in that: The special-shaped clamping groove (9) penetrates the outer wall of the connecting tube (3) to the inner cavity of the docking groove (5), and the clamping column (10) is fixedly connected to the docking ring (6).

4. The high-pitch metal bellows for motor vehicles according to claim 1, characterized in that: When the clamping column (10) is located in the special-shaped clamping groove (9), the docking ring (6) and the fastening ring (8) are squeezed out, and the spring (7) is in a compressed state.

5. The high-pitch metal bellows for motor vehicles according to claim 1, characterized in that: The fastening mechanism (11) comprises four fastening grooves (111) formed on the outer ring of the connecting tube (3); an L-shaped fastening plate (112) is slidably connected to the inner cavity of the fastening groove (111); an arc-shaped groove (113) is formed at one end of the L-shaped fastening plate (112) close to the clamping column (10); and the arc-shaped groove (113) has the same curvature as the outer curvature of the clamping column (10).

6. The high-pitch metal bellows for motor vehicles according to claim 5, characterized in that: The inner cavity of the fastening groove (111) is provided with a second spring (114), and two ends of the second spring (114) are respectively fixedly connected to the fastening groove (111) and the L-shaped fastening plate (112).

7. The high-pitch metal bellows for motor vehicles according to claim 1, characterized in that: A fastening cylinder (115) is arranged outside the connecting cylinder (3), an inner ring of the fastening cylinder (115) is arranged with an internal thread (116), and an outer ring of the connecting cylinder (3) is arranged with an external thread (117).

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