Metal rubber-disc spring composite vibration isolator

Abstract

The invention relates to the field of vibration and noise reduction, in particular to a metal rubber-disc spring composite vibration isolator. The metal rubber-disc spring composite vibration isolator comprises a vibration reduction element, a center shaft, a shell, a bottom plate and a disc spring seat. The damping element comprises a disc spring and a metal rubber component; the bottom of the shell is connected with the bottom plate, and a cavity is formed in the shell and used for protecting the damping element. The central shaft is inserted into the shell, and a convex shoulder is arranged on the central shaft; first clamping grooves are symmetrically formed in the upper side and the lower side of the convex shoulder; a groove is formed in the center of the bottom plate, and a disc spring seat is mounted in the groove; a second clamping groove is formed in the surface of the disc spring seat, and the first clamping groove and the second clamping groove are both used for installing and limiting the disc spring; the metal rubber component is in a hollow butterfly shape, the outer diameter of the disc springs is the same as that of the metal rubber component, the disc springs are arranged on the upper surface and the lower surface of the metal rubber component, and the disc springs and the metal rubber component form a composite sandwich structure in an overlapping mode. The high-performance requirement in an extreme environment can be met, the reliability is high, and the service life is long.

Description

Technical Field

[0001] The invention relates to the field of vibration reduction and noise reduction, and in particular to a metal rubber-disc spring composite vibration isolator. Background Art

[0002] High-speed flying aircraft, launching and returning spacecraft, and deep-sea exploration ships all place extremely high demands on the stability and reliability of the equipment. When performing their tasks, these special equipment often need to operate in extreme and complex environments, such as severe temperature fluctuations, high-intensity vibration and shock, and complex electromagnetic interference, etc. These factors seriously affect the normal operation and life of the equipment. In this environment, since polymer material shock absorbers are prone to aging, the reliability of equipment operation is seriously reduced. At the same time, although metal spring vibration isolators perform well in high temperature resistance and radiation resistance, due to their low loss factor, their vibration isolation effect often cannot meet the needs and cannot fully absorb and dissipate the energy generated by mechanical movement and external impact. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a metal rubber-disc spring composite vibration isolator which can meet the high performance requirements in extreme environments, has high reliability and long service life.

[0004] The present invention provides a metal rubber-disc spring composite vibration isolator, comprising: a vibration reduction element, a central axis, a shell, a bottom plate and a disc spring seat;

[0005] The vibration reduction element includes a disc spring and a metal rubber component;

[0006] The bottom of the shell is connected to the bottom plate.

[0007] The shell has a cavity inside for protecting the vibration-damping element;

[0008] The central shaft is inserted into the housing, and a boss is provided on the central shaft; first slots are symmetrically provided on the upper and lower sides of the boss;

[0009] A groove is provided at the center of the bottom plate, and the disc spring seat is installed in the groove;

[0010] The disc spring seat surface is provided with a second slot.

[0011] The first clamping slot and the second clamping slot are both used for installation and position limiting of disc springs;

[0012] The metal rubber component is hollow butterfly-shaped, the outer diameter of the disc spring is the same as the outer diameter of the metal rubber component, disc springs are arranged on the upper surface and the lower surface of the metal rubber component, and the disc springs are overlapped to form a composite sandwich structure with the metal rubber component. When the disc spring is deformed, it will drive the metal rubber component to deform accordingly.

[0013] In a specific embodiment of the present invention, it also includes a gasket, which is arranged in the groove of the bottom plate and located below the disc spring seat;

[0014] The gasket is in the shape of a disc, and its diameter is the same as the diameter of the groove at the center of the bottom plate.

[0015] In a specific embodiment of the present invention, a brass sleeve is further included. The brass sleeve is arranged on the central axis, and cylindrical through holes are evenly distributed on the outer edge of the brass sleeve. Screws pass through the through holes to connect the brass sleeve to the top surface of the shell.

[0016] In a specific embodiment of the present invention, there are four groups of vibration-damping elements, and the four groups of vibration-damping elements are symmetrically mounted on the upper and lower sides of the central axis respectively.

[0017] In a specific embodiment of the present invention, the bottom plate is in the shape of a disk, and cylindrical through holes are evenly distributed on the outer circumferential surface of the top surface, and is connected to the bottom surface of the shell by screws.

[0018] In a specific embodiment of the present invention, the metal rubber component is manufactured by a stamping die designed according to the parameter size of the disc spring used and a metal rubber four-step process.

[0019] In a specific embodiment of the present invention, the shell and the central shaft are made of 304 stainless steel.

[0020] In a specific embodiment of the present invention, the disc spring is made of 60Si2MnA.

[0021] In a specific embodiment of the present invention, no less than 8 cylindrical through holes are evenly distributed on the outer circumferential surface of the top surface of the bottom plate.

[0022] In a specific embodiment of the present invention, the brass sleeve is connected to the housing via threads.

[0023] Compared with the prior art, the metal rubber-disc spring composite vibration isolator of the present invention has the following beneficial effects:

[0024] (1) The metal rubber component and the disc spring are connected in series as a vibration-damping element. The sliding friction of the internal spiral turns of the metal rubber at the contact point and the sliding friction between the surface spiral turns and the conical surface of the disc spring will absorb the energy generated by the impact or vibration, and the elastic deformation generated by the metal rubber and the disc spring can meet the structural deformation requirements.

[0025] (2) The all-metal structure can provide reliable and stable vibration reduction for special equipment in extreme environments such as high temperature or high radiation.

[0026] (3) The friction of the wire inside the metal rubber component and the friction between the metal rubber component and the disc spring contact surface can be used to dissipate energy, and has a high damping ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a front isometric view of a metal rubber-disc spring composite shock absorber;

[0028] Figure 2 It is a top view of a metal rubber-disc spring composite shock absorber;

[0029] Figure 3 It is a cross-sectional view of a metal rubber-disc spring composite shock absorber;

[0030] Figure 4 It is an exploded diagram of a metal rubber-disc spring composite shock absorber;

[0031] Figure 5 is the load-displacement curve;

[0032] In the figure, 1-center shaft, 2-brass sleeve, 3-disc spring, 4-metal rubber component, 5-housing, 6-disc spring seat, 7-gasket, 8-base plate. DETAILED DESCRIPTION

[0033] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0034] The embodiment of the present invention discloses a metal rubber-disc spring composite vibration isolator, such as Figures 1 to 4 As shown, it includes: a vibration reduction element, a central shaft 1, a housing 5, a bottom plate 8 and a disc spring seat 6;

[0035] The housing 5 is used to contain and protect the vibration-damping element;

[0036] The bottom of the housing 5 is connected to the bottom plate 8.

[0037] The housing 5 has a cavity inside;

[0038] The central shaft 1 is used to install the vibration reduction element and connect the vibration-damped body to the metal rubber-disc spring composite vibration isolator; the central shaft 1 is inserted into the housing 5, and a boss is provided on the central shaft 1; the boss has first slots symmetrically opened on both sides.

[0039] It also includes a brass sleeve 2 for reducing the friction of the central shaft 1; the brass sleeve 2 is sleeved on the central shaft, and cylindrical through holes are evenly distributed on the outer edge of the brass sleeve 2. Screws pass through the through holes to connect the brass sleeve 2 to the top surface of the shell 5.

[0040] The brass sleeve 2 is connected to the housing 5 via threads.

[0041] The housing 5 and the central shaft 1 are made of 304 stainless steel.

[0042] The bottom plate 8 is used to seal the housing 5 and fix the entire device on the base. A groove is provided at the center of the bottom plate 8, and the disc spring seat 6 is installed in the groove.

[0043] The bottom plate 8 is in the shape of a disk, and cylindrical through holes are evenly distributed on the outer circumference of the top surface thereof, and is connected to the bottom surface of the housing 5 by screws. The outer circumference of the top surface of the bottom plate 8 is evenly distributed with no less than 8 cylindrical through holes.

[0044] The gasket 7 is arranged in the groove of the bottom plate 5 and is located at the lower part of the disc spring seat 6;

[0045] The gasket 7 is in the shape of a disk, and its diameter is the same as the diameter of the groove at the center of the bottom plate 8. The pre-compression amount of the vibration-damping element can be adjusted by changing the height.

[0046] The vibration-damping element is used to achieve vibration damping and buffering for the damped body, and includes a disc spring 3 and a metal rubber component 4;

[0047] There are four groups of vibration-damping elements, which are symmetrically mounted on the upper and lower sides of the central axis 1 .

[0048] The disc spring seat 6 is used to install and limit the vibration reduction element. The surface of the disc spring seat 6 is provided with a second slot.

[0049] The first slot and the second slot are both used for installing and limiting the disc spring 3;

[0050] Specifically, four groups of vibration-damping elements are symmetrically mounted on the upper and lower sides of the central shaft 1 shoulder, and two groups of vibration-damping elements located at the lower part of the central shaft 1 shoulder are supported on the first cylindrical groove below the shoulder and the second groove of the disc spring seat 6. Two groups of vibration-damping elements located at the upper part of the central shaft shoulder are supported on the first cylindrical groove above the shoulder and the groove at the top of the housing 5. After the four groups of vibration-damping elements are installed in the housing, they are in a compressed state to ensure that they do not separate during operation.

[0051] The metal rubber component 4 is hollow butterfly-shaped, the outer diameter of the disc spring 3 is the same as that of the metal rubber component 4, disc springs 3 are arranged on the upper surface and the lower surface of the metal rubber component 4, and the disc springs 3 are overlapped to form a composite sandwich structure with the metal rubber component 4. In this sandwich structure, the disc springs 3 and the metal rubber component 4 are connected in series, and when the disc springs 3 are deformed, the metal rubber component 4 will be driven to deform accordingly.

[0052] The composite laminated structure is an all-metal structure that can meet the application requirements under different temperatures or other harsh conditions. The metal rubber component 4 and the disc spring 3 are connected in series as a vibration reduction element. The sliding friction of the internal spiral turns of the metal rubber component 4 at the contact point and the sliding friction between the surface spiral turns and the conical surface of the disc spring 3 will absorb the energy generated by the impact or vibration, and the metal rubber component 4 and the disc spring 3 jointly produce elastic deformation to meet the structural deformation requirements. In this composite laminated structure, the metal rubber component 4 will undergo axial compression deformation, and at the same time, when the disc spring 3 is deformed, it will also drive the metal rubber component 4 to undergo the same deformation. This deformation mechanism is different from the deformation mechanism in the traditional metal rubber and spiral spring parallel structure. In the series structure, the metal rubber component 4 needs to bear the same axial load as the disc spring 3, which is essentially different from the traditional parallel form. By adjusting the parameters of the metal rubber component 4, the stiffness and damping characteristics of the laminated series structure can be adjusted to better suit the vibration reduction and buffering of precision instruments and equipment in special fields such as aerospace, aviation, and navigation.

[0053] The metal rubber component 4 is manufactured by designing a stamping die corresponding to the parameter size of the disc spring used and adopting a metal rubber four-step process.

[0054] The disc spring 3 is made of 60Si2MnA.

[0055] In order to further understand the present invention, the metal rubber-disc spring composite vibration isolator provided by the present invention is described in detail below in conjunction with the embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0056] Example 1

[0057] A metal rubber-disc spring composite vibration isolator, comprising: a vibration reduction element, a central shaft 1, a housing 5, a bottom plate 8 and a disc spring seat 6;

[0058] The housing 5 is used to contain and protect the vibration-damping element;

[0059] The bottom of the housing 5 is connected to the bottom plate 8.

[0060] The housing 5 has a cavity inside;

[0061] The brass sleeve 2 is sleeved on the central axis, and cylindrical through holes are evenly distributed on the outer edge of the brass sleeve 2. Screws pass through the through holes to connect the brass sleeve 2 to the top surface of the housing 5. The brass sleeve 2 is connected to the housing 5 by threads.

[0062] The central shaft 1 is inserted into the housing 5, and a boss is provided on the central shaft 1; first slots are symmetrically provided on the upper and lower sides of the boss;

[0063] A cylindrical groove is formed in the center of the bottom plate 8, and the disc spring seat 6 is installed in the groove;

[0064] The bottom plate 8 is in the shape of a disk, and cylindrical through holes are evenly distributed on the outer circumference of the top surface thereof, and is connected to the bottom surface of the housing 5 by screws. The bottom plate 8 has 8 cylindrical through holes evenly distributed on the outer circumference of the top surface thereof.

[0065] The gasket 7 is arranged in the groove of the bottom plate 5 and is located at the lower part of the disc spring seat 6;

[0066] The gasket 7 is in the shape of a disk, and its diameter is the same as the diameter of the groove at the center of the bottom plate 8. The pre-compression amount of the vibration-damping element can be adjusted by changing the height.

[0067] The vibration reduction element comprises a disc spring 3 and a metal rubber component 4;

[0068] There are four groups of vibration-damping elements, which are symmetrically mounted on the upper and lower sides of the central axis 1 .

[0069] The disc spring seat 6 is used to install and limit the vibration reduction element. The surface of the disc spring seat 6 is provided with a second slot.

[0070] The first slot and the second slot are both used for installing and limiting the disc spring 3;

[0071] Specifically, four groups of vibration-damping elements are symmetrically mounted on the upper and lower sides of the central shaft 1 shoulder, and two groups of vibration-damping elements located at the lower part of the central shaft 1 shoulder are supported on the cylindrical first groove below the shoulder and the second groove of the disc spring seat 6. Two groups of vibration-damping elements located at the upper part of the central shaft shoulder are supported on the cylindrical first groove above the shoulder and the groove at the top of the housing 5. After the four groups of vibration-damping elements are installed in the housing, they are in a compressed state to ensure that they do not separate during operation.

[0072] The metal rubber component 4 is hollow butterfly-shaped, the outer diameter of the disc spring 3 is the same as that of the metal rubber component 4, disc springs 3 are arranged on the upper surface and the lower surface of the metal rubber component 4, and the disc springs 3 are overlapped to form a composite sandwich structure with the metal rubber component 4. In this sandwich structure, the disc springs 3 and the metal rubber component 4 are connected in series, and when the disc springs 3 are deformed, the metal rubber component 4 will be driven to deform accordingly.

[0073] The disc spring 3 is made of 60Si2MnA.

[0074] The compressive load-displacement relationship of the metal rubber-disc spring composite vibration isolator is tested, such as Figure 5 As shown, the vibration-damping element with a series structure of the present invention has a better vibration-damping effect.

[0075] Figure 5DS1 is the test result of a single disc spring group, DS2 is the test result of another single disc spring group, EMWM-2 is the test result of metal rubber, EMWM / DSCS-2 is the test result of a group of metal rubber disc springs in series, and DSCS is the test result of multiple disc springs in series.

[0076] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0077] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A metal rubber-disc spring composite vibration isolator, characterized in that: include: Vibration-damping element, center shaft, housing, base plate and disc spring seat; The vibration reduction element includes a disc spring and a metal rubber component; The bottom of the shell is connected to the bottom plate. The shell has a cavity inside for protecting the vibration-damping element; The central shaft is inserted into the housing, and a boss is provided on the central shaft; first slots are symmetrically provided on the upper and lower sides of the boss; A groove is provided at the center of the bottom plate, and the disc spring seat is installed in the groove; The disc spring seat surface is provided with a second slot. The first clamping slot and the second clamping slot are both used for installation and position limiting of disc springs; The metal rubber component is hollow butterfly-shaped, the outer diameter of the disc spring is the same as the outer diameter of the metal rubber component, disc springs are arranged on the upper surface and the lower surface of the metal rubber component, and the disc springs are overlapped to form a composite sandwich structure with the metal rubber component. When the disc spring is deformed, it will drive the metal rubber component to deform accordingly.

2. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: Also included is a gasket, which is arranged in the groove of the bottom plate and located at the lower part of the disc spring seat; The gasket is in the shape of a disc, and its diameter is the same as the diameter of the groove at the center of the bottom plate.

3. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: It also includes a brass sleeve, which is arranged on the central axis. The outer edge of the brass sleeve is evenly distributed with cylindrical through holes, and screws pass through the through holes to connect the brass sleeve to the top surface of the shell.

4. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: There are four groups of vibration-damping elements, which are symmetrically mounted on the upper and lower sides of the central axis respectively.

5. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: The bottom plate is in the shape of a disk, and cylindrical through holes are evenly distributed on the outer circumference of the top surface, and is connected to the bottom surface of the shell by screws.

6. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: The metal rubber component is manufactured by designing a corresponding stamping die according to the parameter size of the disc spring used and adopting a metal rubber four-step process method.

7. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: The shell and the central shaft are made of 304 stainless steel.

8. The metal rubber-disc spring composite vibration isolator according to claim 1, characterized in that: The disc spring is made of 60Si2MnA.

9. The metal rubber-disc spring composite vibration isolator according to claim 5, characterized in that: The outer circumferential surface of the top surface of the bottom plate is evenly distributed with no less than 8 cylindrical through holes.

10. The metal rubber-disc spring composite vibration isolator according to claim 3, characterized in that: The brass sleeve is connected to the housing through threads.

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