Composite electromagnetic dynamic vibration absorber for bullet train

Abstract

The utility model provides a composite electromagnetic dynamic vibration absorber for a bullet train, which belongs to the technical field of vibration absorption and comprises an outer shell, a vibration absorption component and a guide component. An end cover is arranged at the bottom of the outer shell, assembling holes are formed in the periphery of the surface of the end cover, and a connecting hole is formed in the bottom end of the outer shell; according to the utility model, the coil is arranged inside the outer shell, when forward current passes through the coil, the movable iron core is subjected to downward electromagnetic force and Ampere force at the same time, and when reverse current passes through the coil, the movable iron core is subjected to upward force, so that when a certain single-frequency simple harmonic current passes through the coil, the movable iron core is subjected to single-frequency force; the movable iron core serves as a mass block of the active vibration absorber, is excited by electromagnetic force and can move back and forth in the linear bearing to drive the outer shell to vibrate along with the linear bearing, generated vibration and vibration generated in the advancing process of a vehicle body are offset to the maximum degree, and therefore vibration transmitted by the vehicle body is reduced, and riding comfort and stability are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration absorption, in particular to a composite electromagnetic power vibration absorber for a motor vehicle. Background Art

[0002] In many industrial fields, mechanical vibration is an engineering problem that cannot be ignored. With the rapid development of EMUs, the smoothness and comfort of riding are considered as an important improvement direction. Different vibration absorption designs are used to reduce the vibration of the vehicle body. Vibration absorbers are widely used as a common vibration control method. Active vibration absorption, as the ultimate form of vibration absorber, can suppress vibration to the greatest extent. The traditional active electromagnetic vibration absorber generates electromagnetic force in the following ways: (1) Ampere force type vibration absorber: Most of the wires of this type of vibration absorber are circumferentially wound, and the energized wire generates Ampere force under the action of the radial magnetic field. This type of vibration absorber requires placing a coil in the air gap. When the coil is energized, an Ampere force is generated in the air gap magnetic field. (2) Electromagnet type vibration absorber: The current-carrying wire surrounding the iron core is energized to turn the iron core into an electromagnet. The electromagnet attracts or repels the mover to generate electromagnetic force. However, the operating conditions of the EMU are complex and are affected by different factors such as region and environment. After long-term use, the moving iron core will have a certain degree of eccentricity. Since there is no guiding structure for the movement of the moving iron core, the shaking amplitude generated by the moving iron core after operation is unstable, and thus it cannot effectively absorb vibrations, but instead increases vibrations. Utility Model Content

[0003] The purpose of the present utility model is to provide a composite electromagnetic dynamic vibration absorber for EMUs, so as to solve the problem raised in the above-mentioned background technology that the moving iron core becomes eccentric to a certain extent after long-term use due to the influence of different factors such as region and environment, and since there is no guiding structure for the movement of the moving iron core, the shaking amplitude generated by the moving iron core after operation is unstable, thereby failing to effectively absorb vibrations and increasing vibrations.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a composite electromagnetic dynamic vibration absorber for a motor vehicle, comprising an outer shell, a vibration absorbing assembly and a guide assembly;

[0005] Wherein: an end cover is provided at the bottom of the outer shell, an assembly hole is opened around the surface of the end cover, and a connecting hole is opened at the bottom of the outer shell, and the assembly hole corresponds to the connecting hole;

[0006] The shock absorbing assembly includes a coil fixedly mounted inside an outer shell, a linear bearing is provided in the middle of the outer shell, a moving iron core is installed inside the linear bearing, and the coil is arranged around the outside of the moving iron core;

[0007] The guide assembly includes a mounting groove opened in the middle of the outer shell and the end cover, a guide groove is opened through the middle of the mounting groove, and guide rods are installed at both ends of the moving iron core, and the guide rods are inserted into the guide groove.

[0008] As a preferred solution of the present invention: a limiting ring is fixedly installed on the surface of the guide rod, a spring is installed inside the installation groove, and the limiting ring is in contact with one end of the spring.

[0009] As a preferred solution of the present invention: a mounting ring is fixedly mounted on the middle portion of the surface of the outer shell, and a mounting hole is opened on the surface of the mounting ring.

[0010] As a preferred solution of the present invention: the bottom of the end cover is connected to a counterweight cylinder, and a plurality of counterweight rings are provided inside the counterweight cylinder.

[0011] As a preferred solution of the present invention: the counterweight ring is magnetically attracted inside the counterweight cylinder.

[0012] As a preferred solution of the present invention: a junction box is fixedly mounted on the surface of the outer shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) A coil is provided inside the outer shell. When a positive current flows through the coil, the moving iron core is subjected to a downward electromagnetic force and an Ampere force at the same time. When a reverse current flows through the coil, the moving iron core is subjected to an upward force. Therefore, when a single-frequency simple harmonic current flows through the coil, the moving iron core is subjected to a single-frequency force. The moving iron core, as the mass block of the active vibration absorber, is excited by the electromagnetic force and moves back and forth inside the linear bearing, driving the outer shell to follow the vibration. The generated vibration is offset to the greatest extent by the vibration generated by the vehicle body during movement, thereby reducing the vibration transmitted by the vehicle body and ensuring ride comfort and stability.

[0015] (2) Through the provided guide assembly, when the moving iron core moves back and forth inside the linear bearing, the guide rods at both ends of the moving iron core move inside the guide groove in the middle of the installation groove. The guide groove plays the role of limiting the movement of the guide rod, so that the moving iron core keeps running in a straight line, avoiding eccentricity and causing unstable vibration amplitude. A limit ring is installed on the surface of the guide rod, and the limit ring is in contact with the spring inside the installation groove. The spring ensures that the guide rod is in a reset state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0018] Figure 3This is a schematic diagram of the spring installation structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the counterweight ring installation structure of the utility model.

[0020] In the figure: 1. Outer shell; 2. End cover; 3. Assembly hole; 4. Connection hole; 5. Shock-absorbing assembly; 51. Coil; 52. Linear bearing; 53. Moving iron core; 6. Guide assembly; 61. Mounting groove; 62. Guide groove; 63. Guide rod; 64. Limiting ring; 65. Spring; 7. Mounting ring; 8. Mounting hole; 9. Counterweight cylinder; 10. Counterweight ring; 11. Junction box. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1-4 A composite electromagnetic dynamic vibration absorber for a motor vehicle comprises: an outer shell 1, a vibration absorbing assembly 5, and a guide assembly 6; an end cover 2 is provided at the bottom of the outer shell 1, and assembly holes 3 are formed around the surface of the end cover 2; a connecting hole 4 is formed at the bottom end of the outer shell 1, and the assembly hole 3 corresponds to the connecting hole 4;

[0023] See also Figure 2 , Figure 3 The shock absorbing assembly 5 includes a coil 51 fixedly mounted inside the outer shell 1 , a linear bearing 52 is provided in the middle of the outer shell 1 , a moving iron core 53 is installed inside the linear bearing 52 , and the coil 51 is arranged around the outside of the moving iron core 53 .

[0024] During specific use: a coil 51 is provided inside the outer shell 1. When a forward current is passed through the coil 51, the moving iron core 53 will be subjected to a downward electromagnetic force and an Ampere force at the same time. When a reverse current is passed through the coil 51, the moving iron core 53 will be subjected to an upward force. Therefore, when a single-frequency simple harmonic current is passed through the coil 51, the moving iron core 53 will be subjected to a single-frequency force. The moving iron core 53, as the mass block of the active vibration absorber, is excited by the electromagnetic force and will move back and forth inside the linear bearing 52, driving the outer shell 1 to follow the vibration. The generated vibration will offset the vibration generated by the vehicle body during its movement to the greatest extent, thereby reducing the vibration transmitted by the vehicle body and ensuring riding comfort and stability.

[0025] See also Figure 2 , Figure 3 The guide assembly 6 includes a mounting groove 61 opened in the middle of the outer shell 1 and the end cover 2, and a guide groove 62 is opened through the middle of the mounting groove 61. Guide rods 63 are installed at both ends of the moving iron core 53. The guide rods 63 are inserted into the guide groove 62. A limit ring 64 is fixedly installed on the surface of the guide rod 63. A spring 65 is installed inside the mounting groove 61, and the limit ring 64 is in contact with one end of the spring 65.

[0026] During specific use: when the moving iron core 53 moves back and forth inside the linear bearing 52, the guide rods 63 at both ends of the moving iron core 53 move inside the guide groove 62 in the middle of the installation groove 61. The guide groove 62 plays a role in limiting the movement of the guide rod 63, so that the moving iron core 53 keeps running in a straight line, avoiding the eccentricity of the guide rod 63 and causing unstable vibration amplitude, thereby reducing the offsetting effect of the vehicle body vibration. A limit ring 64 is installed on the surface of the guide rod 63, and the limit ring 64 is in contact with the spring 65 inside the installation groove 61. The spring 65 ensures that the guide rod 63 is in a reset state.

[0027] See also Figure 1 , Figure 2 A mounting ring 7 is fixedly mounted on the middle portion of the surface of the outer shell 1 , and a mounting hole 8 is opened on the surface of the mounting ring 7 .

[0028] During specific use: a mounting ring 7 is installed in the middle of the outer shell 1, and mounting holes 8 are provided on the surface of the mounting ring 7 to facilitate the installation of the vibration absorber on the vehicle body.

[0029] See also Figure 4 The bottom of the end cover 2 is connected to a counterweight cylinder 9, and a plurality of counterweight rings 10 are provided inside the counterweight cylinder 9. The counterweight rings 10 are magnetically attracted to the inside of the counterweight cylinder 9.

[0030] During specific use: the bottom of the end cover 2 is connected to a counterweight cylinder 9, and the interior of the counterweight cylinder 9 is magnetically connected to multiple counterweight rings 10. The counterweight rings 10 can be added or subtracted according to the vehicle working conditions and vibration frequency to achieve a balanced offset state with the vibration.

[0031] See also Figure 1 A junction box 11 is fixedly mounted on the surface of the outer shell 1 .

[0032] During specific use: the outer shell 1 energizes the coil 51 through the junction box 11 on the surface to ensure the normal operation of the device.

[0033] When the moving iron core 53 moves back and forth inside the linear bearing 52, the guide rods 63 at both ends of the moving iron core 53 move inside the guide groove 62 in the middle of the mounting groove 61. The guide groove 62 serves to limit the movement of the guide rod 63, so that the moving iron core 53 keeps running in a straight line, avoiding the eccentricity of the guide rod 63 and causing unstable vibration amplitude, thereby reducing the offsetting effect of the vehicle body vibration, thereby reducing the vibration transmitted by the vehicle body and ensuring riding comfort and stability. A limit ring 64 is installed on the surface of the guide rod 63, and the limit ring 64 is in contact with the spring 65 inside the mounting groove 61. The spring 65 ensures that the guide rod 63 is in a reset state.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A composite electromagnetic dynamic vibration absorber for a motor vehicle, characterized in that: include: An outer shell (1), wherein an end cover (2) is provided at the bottom of the outer shell (1), an assembly hole (3) is provided on the surface of the end cover (2) around the periphery, and a connection hole (4) is provided at the bottom end of the outer shell (1), and the assembly hole (3) corresponds to the connection hole (4); A shock absorbing assembly (5), the shock absorbing assembly (5) comprising a coil (51) fixedly mounted inside an outer shell (1), a linear bearing (52) being provided in the middle of the outer shell (1), a moving iron core (53) being mounted inside the linear bearing (52), and the coil (51) being arranged around the outside of the moving iron core (53); A guide assembly (6) includes a mounting groove (61) provided in the middle of the outer shell (1) and the end cover (2), a guide groove (62) extending through the middle of the mounting groove (61), guide rods (63) being provided at both ends of the movable iron core (53), and the guide rods (63) being inserted into the guide groove (62).

2. The composite electromagnetic dynamic vibration absorber for a motor vehicle according to claim 1, characterized in that: A limiting ring (64) is fixedly mounted on the surface of the guide rod (63), a spring (65) is mounted inside the mounting groove (61), and the limiting ring (64) is in contact with one end of the spring (65).

3. The composite electromagnetic dynamic vibration absorber for a motor vehicle according to claim 1, characterized in that: A mounting ring (7) is fixedly mounted on the middle portion of the surface of the outer shell (1), and a mounting hole (8) is provided on the surface of the mounting ring (7).

4. The composite electromagnetic dynamic vibration absorber for a motor vehicle according to claim 1, characterized in that: The bottom of the end cover (2) is connected to a counterweight cylinder (9), and a plurality of counterweight rings (10) are provided inside the counterweight cylinder (9).

5. The composite electromagnetic dynamic vibration absorber for a motor vehicle according to claim 4, characterized in that: The counterweight ring (10) is magnetically attracted inside the counterweight cylinder (9).

6. The composite electromagnetic dynamic vibration absorber for a motor vehicle according to claim 1, characterized in that: A junction box (11) is fixedly mounted on the surface of the outer shell (1).

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