Rubber vibration isolator for motor vibration isolation

Abstract

The rubber vibration isolator is installed between a motor base and a flange base and comprises an upper metal piece, a rubber element and a lower metal buckle, the upper metal piece and the lower metal buckle are both designed in a segmented mode, and the upper metal piece and the lower metal buckle are sequentially connected with the rubber element in a staggered and embedded mode. Compared with the prior art, through the metal-rubber matrix-metal sandwich structure, the flexural rigidity of the vibration isolator can be remarkably improved, the torque effect acting on the vibration isolator can be converted into the compression effect which is easier to bear by rubber, the torsional rigidity of the vibration isolator is improved, the static load of a motor can be borne, and the vibration isolator can be used for vibration isolation. And the radial force and the torque when the motor works can be borne. Besides, the increase amount of the axial height of the motor is small, the motor vibration isolator is suitable for vibration isolation of motor equipment with the axial installation space limited, and the motor vibration isolator has the advantages of being good in vibration isolation performance, high in bearing capacity, good in fatigue resistance, simple in structure and convenient to install and maintain.

Description

Technical Field

[0001] The invention relates to the technical field of motor vibration isolation, and in particular to a rubber vibration isolator used for motor vibration isolation. Background Art

[0002] With the rapid development of industrial automation and intelligence, motors, as key power sources, have been widely used in machinery manufacturing, transportation, energy, construction and other fields. However, motors often vibrate during operation due to imbalance, installation errors, design defects or the influence of the working environment. These vibrations will increase the mechanical loss and energy consumption of the motor, reduce the operating efficiency of the motor, shorten the service life of the motor and related equipment, and in severe cases may cause equipment damage or failure, thus affecting the normal operation of the entire system. These vibrations are also usually accompanied by loud noises, which affect the working environment.

[0003] In this context, motor vibration isolation is particularly important. Through effective vibration isolation measures, the transmission of vibration can be significantly reduced, the operating noise of equipment can be reduced, and the service life of the motor and its accessories can be extended. In addition, vibration isolation technology can also improve the overall operating efficiency of the motor, protect the stability of the system, and meet the needs of efficient production. Therefore, motor vibration isolation technology is not only the basis for ensuring the stable operation of equipment, but also a key link in improving production quality in the modern industrial field.

[0004] In the prior art, a Chinese patent application with publication number CN111923936A discloses a quasi-zero stiffness vibration isolator for railway vehicle traction motors. The vibration isolator comprises an upper mounting seat connected to a connecting bracket, a lower mounting seat connected to a frame beam of a vehicle body, and a disc spring and a rubber spring connected to the upper mounting seat and the lower mounting seat, wherein the connecting bracket is rigidly connected to the motor bracket. The vibration isolator isolates the vibration transmitted from the connecting bracket to the frame beam to a certain extent, but does not deal with the vibration directly transmitted from the motor to the connecting bracket. The vibration of the motor will affect the operating stability and safety of the connecting bracket, and even cause fatigue damage. In addition, the thickness of the vibration isolator is relatively large, which to a certain extent compresses the upper part of the vehicle body frame beam and the space for left and right movement during the operation of the railway vehicle, and is not suitable for vibration isolation of motor equipment with limited axial installation space. Summary of the invention

[0005] The purpose of the present invention is to provide a rubber vibration isolator for motor vibration isolation in order to overcome the defects of the above-mentioned prior art, to realize an ultra-thin rubber vibration isolator that can be suitable for motor equipment with limited axial installation space and improve vibration isolation performance.

[0006] The objective of the present invention can be achieved through the following technical solution: a rubber isolator for motor vibration isolation, installed between the motor base and the flange base, comprising an upper metal part, a rubber element and a lower metal clip, the upper metal part and the lower metal clip both adopt a segmented design, and the upper metal sheet and the lower metal clip are sequentially interlaced and embedded in the connecting rubber element.

[0007] Furthermore, the upper metal element includes an upper metal sheet and an upper metal buckle, the upper metal buckle is welded to the bottom of the upper metal sheet, the upper metal sheet is embedded in the rubber element, and the surface of the upper metal sheet is flush with the surface of the rubber element.

[0008] Furthermore, the cross section of the upper metal sheet is bent in an L-shape.

[0009] Furthermore, the upper metal buckle is in concentric contact with the opening of the motor base and is fixedly connected by a bolt connector.

[0010] Furthermore, the surface of the lower metal buckle is flush with the surface of the rubber element.

[0011] Furthermore, the lower metal buckle and the flange base are opened in a concentric contact and are fixedly connected by screws.

[0012] Furthermore, the upper part and the lower part of the rubber element are respectively provided with grooves for correspondingly embedding the upper metal buckle and the lower metal buckle.

[0013] Furthermore, the rubber element is vulcanized into one piece with the upper metal piece and the lower metal buckle.

[0014] Furthermore, the rubber element is a circular ring structure, and the upper metal sheet and the lower metal buckle are evenly distributed 360° along the circumference.

[0015] Furthermore, the lower metal buckle and the adjacent upper metal sheet have an overlapping length in the circumferential direction.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The present invention is installed between the motor base and the flange base, connected to the motor base through the upper metal piece, and connected to the flange base through the lower metal buckle. A rubber element is provided between the upper metal piece and the lower metal buckle, realizing a metal-rubber matrix-metal sandwich structure. This design avoids direct transmission of vibration through metal, and utilizes the elastic deformation and energy dissipation characteristics of the rubber element to achieve good vibration isolation performance.

[0018] In the present invention, both the upper metal sheet and the lower metal buckle are designed in sections and embedded in the rubber element, which can significantly increase the bending stiffness of the vibration isolator. In addition, the surfaces of the upper metal sheet and the lower metal buckle are flush with the rubber, ensuring that the two end surfaces of the vibration isolator are flat, which is convenient for the installation of the vibration isolator; the upper metal sheet and the adjacent lower metal buckle have an overlapping length in the circumferential direction, which can transform the torque effect acting on the vibration isolator into a compression effect that the rubber can more easily withstand, thereby increasing the torsional stiffness of the vibration isolator. The vibration isolator can not only withstand the static load of the motor, but also withstand the radial force and torque when the motor is working.

[0019] In the present invention, the cross-section of the metal clip is L-shaped. The bent design realizes the sinking of the motor mounting platform, which can reduce the increase in the axial mounting height of the motor and is suitable for vibration isolation of motor equipment with limited axial mounting space. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional view of the present invention;

[0021] Figure 2 It is a half-section schematic diagram of the present invention;

[0022] Figure 3 A half-section schematic diagram of an assembly installed between a motor base and a flange base of the present invention, wherein the section line is selected as a line connecting the centers of two bolt connectors;

[0023] Figure 4 A half-section schematic diagram of an assembly of the present invention installed between a motor base and a flange base, wherein the section line is selected as a line connecting the centers of two screws;

[0024] Figure 5 A three-dimensional view of the assembly of the present invention installed between the motor base and the flange base;

[0025] Marking instructions in the figure: 1. upper metal part, 11. upper metal sheet, 12. upper metal buckle, 2. rubber element, 3. lower metal buckle, 4. bolt connector, 41. bolt, 42. nut, 43. gasket, 5. screw, 6. motor, 7. flange base. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figure 1 to Figure 5 As shown, a rubber vibration isolator for motor vibration isolation includes an upper metal piece 1, a lower metal buckle 3 and a rubber element 2 fixed between the upper metal piece 1 and the lower metal buckle 3.

[0029] The upper metal part 1 is connected to the base of the motor 6 , and the lower metal buckle 3 is connected to the flange base 7 .

[0030] In this embodiment, the rubber element 2 is a circular ring with corresponding grooves on the upper and lower parts respectively. The upper metal part 1 is composed of an upper metal sheet 11 and an upper metal buckle 12 welded to the bottom of the upper metal sheet 11; the upper metal sheet 11 adopts a segmented design and is evenly distributed in the 360° circumferential direction, and the cross-section of each segment of the upper metal sheet 11 is a bent L-shaped; an opening is left on the upper metal buckle 12; the lower metal buckle 3 also adopts a segmented design and is evenly distributed in the 360° circumferential direction, and an opening is left on each segment of the lower metal buckle 3, and there is a small overlap length with the adjacent upper metal sheet 11 in the circumferential direction; the thickness of the upper metal sheet 11 and the lower metal buckle 3 is preferably in the range of 3-5mm.

[0031] In this embodiment, four upper metal sheets 11 are embedded in the upper grooves of the rubber element 2, and the surfaces are flush with the rubber surface; four lower metal buckles 3 are embedded in the lower grooves of the rubber element 2, and the surfaces are flush with the rubber surface; the rubber element 2 is selected from chloroprene rubber, and the Shore hardness is between 60-65; the rubber element 2 and the upper metal part 1 and the lower metal buckle 3 are vulcanized into one; the upper metal buckle 12 is in center contact with the through hole of the base of the motor 6, and is fixedly connected by the bolt connector 4; the bolt 41 of the bolt connector 4 penetrates into the opening from bottom to top, and the gasket 43 of the bolt connector 4 is located on the upper surface of the base of the motor 6 and is tightened by the nut 42 of the bolt connector 4; the lower metal buckle 3 is in center contact with the through hole of the flange base 7, and is fixedly connected by the screw 5, and the screw 5 penetrates into the opening from top to bottom.

[0032] This scheme significantly increases the bending stiffness of the vibration isolator through the metal-rubber matrix-metal sandwich structure, and transforms the torque effect acting on the vibration isolator into a compression effect that the rubber can more easily withstand, thereby increasing the torsional stiffness of the vibration isolator. It can not only withstand the static load of the motor, but also withstand the radial force and torque when the motor is working. Compared with the prior art, this scheme increases the axial height of the motor by less than 5mm, and is suitable for vibration isolation of motor equipment with limited axial installation space. This scheme has strong load-bearing capacity, good fatigue resistance, and a simple structure. It is detachable and can be replaced in situ, which is easy to install and maintain.

Claims

1. A rubber vibration isolator for motor vibration isolation, characterized in that: The device is installed between the base of a motor (6) and a flange base (7), and comprises an upper metal part (1), a rubber element (2) and a lower metal buckle (3). The upper metal part (1) and the lower metal buckle (3) are both designed in sections, and the upper metal sheet (11) and the lower metal buckle (3) are alternately embedded in the connected rubber element (2) in sequence.

2. A rubber vibration isolator for motor vibration isolation according to claim 1, characterized in that: The upper metal element comprises an upper metal sheet (11) and an upper metal buckle (12); the upper metal buckle (12) is welded to the bottom of the upper metal sheet (11); the upper metal sheet (11) is embedded in the rubber element (2); and the surface of the upper metal sheet (11) is flush with the surface of the rubber element (2).

3. The rubber vibration isolator for motor vibration isolation according to claim 2, characterized in that: The cross section of the upper metal sheet (11) is bent in an L-shape.

4. The rubber vibration isolator for motor vibration isolation according to claim 2, characterized in that: The upper metal buckle (12) and the motor (6) base are opened and contacted with each other in an aligned manner, and are fixedly connected via a bolt connector (4).

5. The rubber vibration isolator for motor vibration isolation according to claim 2, characterized in that: The surface of the lower metal buckle (3) is flush with the surface of the rubber element (2).

6. The rubber vibration isolator for motor vibration isolation according to claim 1, characterized in that: The lower metal buckle (3) and the flange base (7) are opened to contact each other in an aligned manner and are fixedly connected by screws (5).

7. The rubber vibration isolator for motor vibration isolation according to claim 5, characterized in that: The upper part and the lower part of the rubber element (2) are respectively provided with slots for correspondingly embedding the upper metal buckle (12) and the lower metal buckle (3).

8. The rubber vibration isolator for motor vibration isolation according to claim 7, characterized in that: The rubber element (2) is vulcanized into one piece with the upper metal piece (1) and the lower metal buckle (3).

9. The rubber vibration isolator for motor vibration isolation according to claim 1, characterized in that: The rubber element (2) is a circular ring structure, and the upper metal sheet (11) and the lower metal buckle (3) are evenly distributed along the circumference of 360°.

10. The rubber vibration isolator for motor vibration isolation according to claim 9, characterized in that: The lower metal buckle (3) and the adjacent upper metal sheet (11) have an overlapping length in the circumferential direction.

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