Variable inerter planetary conical column inerter

Abstract

The application discloses a variable inertial planet conical column inertial container and relates to the technical field of vibration absorption devices.The variable inertial planet conical column inertial container comprises an upper shell, a planet cylinder arranged on one side of the upper shell, a lower shell arranged on the side, away from the upper shell, of the planet cylinder, a push rod arranged on the upper shell, a vibration absorption device connected with the push rod, a support connected with the vibration absorption device, end covers arranged on the two sides of the support, hydraulic shock absorbers connected with the end covers, and elastic elements arranged on the hydraulic shock absorbers.The hydraulic shock absorbers, the elastic elements, the end covers, the support and the vibration absorption device are arranged in the planet cylinder, the push rod penetrates through the left and right surfaces of the upper shell and is in sliding contact with the upper shell, the support penetrates through the left and right surfaces of the vibration absorption device and is rotationally connected with the vibration absorption device through ball bearings, the two ends of the support are connected and fixed with the hydraulic shock absorbers through the end covers, and the hydraulic shock absorbers are fixedly arranged in the planet cylinder.Compared with the prior art, the variable inertial planet conical column inertial container has the advantages of good vibration isolation effect, low cost, fast response, high reliability, easy installation and arrangement, high production efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration absorber, in particular to a variable inertia container of planetary conical column type. BACKGROUND

[0002] Inertia container is a two-end element, when used as an inertial element in application occasions such as dynamic vibration absorber, its action form is quite different from that of single mass, which inevitably causes problems such as narrowing of vibration reduction frequency band; in addition, the inherent defect of inertia container with fixed structure is that when the radial size of the flywheel is limited, the structural parameters cannot be adjusted, the inertia-mass ratio of the ball screw type inertia container cannot be changed, and when used in suspension system, the effect is not particularly ideal, the inertia value is constant, and the use effect is general, so the demand for inertia container with adjustable inertia value is increasing; at present, the force control equipment applied in dynamic vibration absorption includes gear rack type, ball screw, hydraulic generation type, lever mass type, torsion type, small tooth difference planetary gear type, and cycloid steel ball type equipment structures, these mechanisms for dynamic vibration absorption have complex processing technology, high impact load requirement of parts, high manufacturing cost, and are not easy to arrange in practice, and there are more rigid connections between parts, resulting in a certain gap between the final mechanism vibration isolation effect and the expected effect; however, the current work mainly relies on the cooperation of inertia container and force control equipment to realize dynamic vibration absorption, but there are problems such as high cost, large required layout space, difficult after-sales maintenance, short service life of mechanism, and difficult processing and installation;

[0003] In view of the above situation, it is necessary to improve the working mode of existing variable inertia parts and inertia providing parts, so that they can adapt to the inertia container device with adjustable inertia value according to working conditions and meet the needs of inertia container with vibration absorption capacity. SUMMARY

[0004] The purpose of the present application is to solve the problems of high cost, large required layout space, difficult after-sales maintenance, short service life of mechanism, and difficult processing and installation of existing vibration isolation systems containing inertial mass elements, and a variable inertia container of planetary conical column type is designed, which realizes the fusion of variable inertia parts and inertia providing parts, the inertia container device with adjustable inertia value according to working conditions, can relieve the instantaneous impact caused by the unchangeable inertia value when the large load acts instantaneously, and reduces the cost and saves the layout space.

[0005] To achieve the above purpose, the technical scheme of the present application is a variable inertia container of planetary conical column type, which comprises an upper shell, a planetary cylinder arranged on one side of the upper shell, a lower shell arranged on the side of the planetary cylinder away from the upper shell, a push rod arranged on the upper shell, a vibration absorber connected with the push rod, a bracket connected with the vibration absorber, end covers arranged on both sides of the bracket, a hydraulic shock absorber connected with the end cover, and an elastic element arranged on the hydraulic shock absorber.

[0006] The hydraulic damper, the elastic element, the end cover, the support and the vibration absorbing device are arranged in the planetary cylinder, the push rod penetrates the left and right surfaces of the upper shell and is in sliding contact with the upper shell, the support penetrates the left and right surfaces of the vibration absorbing device and is rotatably connected with the vibration absorbing device through the ball bearing, the two ends of the support are fixedly connected with the hydraulic damper through the end cover, and the hydraulic damper is fixedly installed in the planetary cylinder.

[0007] Further supplement to the technical solution, the vibration absorbing device comprises a conical column type lead screw integrated with the push rod and a conical column type planetary gear connected with the conical column type lead screw through thread engagement, the conical column type lead screw is arranged at the center of the planetary cylinder, and the support penetrates the left and right surfaces of the conical column type planetary gear and is rotatably connected with the conical column type planetary gear through the ball bearing.

[0008] Further supplement to the technical solution, the conical column type planetary gear is provided with multiple groups and is arranged in a circular array around the conical column type lead screw with the conical column type lead screw as the center.

[0009] Further supplement to the technical solution, the materials of the conical column type lead screw and the conical column type planetary gear are zirconium or 30Cr, and the thread parts of the conical column type lead screw and the conical column type planetary gear are subjected to quenching treatment or iron fluoride spraying.

[0010] Further supplement to the technical solution, in the working arrangement, the planetary conical column type inerter is used in parallel with one or more spring elements.

[0011] Further supplement to the technical solution, the conical column type lead screw is provided with two and is symmetrically arranged, the symmetrically arranged conical column type lead screws are integrated and the conical column type lead screw at one end is connected with the push rod.

[0012] Further supplement to the technical solution, two conical column type planetary gears are arranged on the support in the axial direction and are connected with the two symmetrically arranged conical column type lead screws through thread engagement.

[0013] Further supplement to the technical solution, the support penetrates the two conical column type planetary gears and is rotatably connected with the two conical column type planetary gears through the ball bearings embedded in the conical column type planetary gears.

[0014] Further supplement to the technical solution, the cross section of the conical column type lead screw is in the shape of a sharp shovel.

[0015] Further supplement to the technical solution, the push rod is welded with an upper lifting lug at the end away from the planetary cylinder, and the lower shell is welded with a lower lifting lug at the side away from the planetary cylinder.

[0016] The beneficial effects of the present invention are that the inertial device and damping device achieved by the present invention have simplified structures, which can effectively reduce the cost, structural complexity and failure rate of the vibration isolation system, facilitate large-scale production and practical application, and are superior to many existing designs in terms of installation and subsequent maintenance. It has very important practicality for improving the technology of modern mechanical vibration isolation systems.

[0017] 2. The present invention adopts an integrated design and non-rigid connection, which greatly reduces the internal mechanical friction and mechanical delay of the vibration isolation system, greatly improving the system's responsiveness and vibration isolation performance, which is of great significance to the system's high efficiency and high performance;

[0018] 3. This invention implements a variable inertia design, integrating a simple, feasible, easy-to-manufacture inertia container device with an inertial device and a damping device. This effectively addresses the instantaneous impact caused by the immutable inertia value when a large load is applied instantaneously, and plays a leading role in the future update and iteration of automotive vibration reduction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a first embodiment of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the tapered column type planetary gear of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the internal layout of the planetary cylinder of the present invention;

[0022] Figure 4 is a schematic structural diagram of a second embodiment of the present invention;

[0023] Figure 5 It is a structural diagram of a new tapered cylindrical screw;

[0024] In the figure, 1. upper lifting ear; 2. push rod; 3. upper housing; 4. tapered cylindrical screw; 41. active tapered cylindrical screw; 42. driven tapered cylindrical screw; 5. planetary cylinder; 6. hydraulic shock absorber; 7. elastic element; 8. bracket; 9. ball bearing; 10. tapered cylindrical planetary gear; 11. end cover; 12. lower housing; 13. lower lifting ear; 14. first tapered cylindrical planetary gear; 15. second tapered cylindrical planetary gear. DETAILED DESCRIPTION

[0025] First embodiment

[0026] First, the original intention of the design of the present invention is explained. Due to the problems of existing vibration isolation systems containing inertial mass elements, such as high cost, large layout space required, difficult after-sales maintenance, short mechanism life, and difficult processing and installation, how to design an inertia container device that does not require control, is simple and feasible, easy to manufacture, and the inertia value can be adjusted at any time according to the working conditions, so as to alleviate the instantaneous impact caused by the immutable inertia value when a large load acts instantly, has become a difficult problem that needs to be solved urgently. Based on this, we designed a planetary conical cylinder inertia container with variable inertia, which realizes the fusion of variable inertia parts and inertia providing parts. The present invention has a simple structure, fewer parts, is easy to mass-produce, has low cost, saves layout space, and is convenient for enterprise promotion and use.

[0027] It should be noted that in the actual working arrangement, the planetary conical cylindrical inertia container with variable inertia described in the present invention needs to be used in parallel with a spring element (>=1) to form a vibration isolation system to prevent the vibration isolation equipment from being crushed by the gravity of the equipment to be isolated, resulting in breakdown and loss of vibration isolation function.

[0028] In order to make the technical solution more clear to those skilled in the art, Figures 1-5 Explain the specific structure and principle of each of the above mechanisms:

[0029] like Figures 1-3 As shown, a planetary conical cylindrical inertia container with variable inertia includes an upper shell 3, a planetary cylinder 5 arranged on one side of the upper shell 3, a lower shell 12 arranged on the side of the planetary cylinder 5 away from the upper shell 3, a push rod 2 arranged on the upper shell 3, a vibration absorbing device connected to the push rod 2, a bracket 8 connected to the vibration absorbing device, end covers 11 arranged on both sides of the bracket 8, a hydraulic shock absorber 6 connected to the end cover 11, and an elastic element 7 arranged on the hydraulic shock absorber 6; wherein the hydraulic shock absorber 6, the elastic element 7, the end cover 11, the bracket 8, and the vibration absorbing device are arranged in the planetary cylinder 5, and the push rod 2 is inserted through the support 8. It is put through the left and right surfaces of the shell 3 and is in sliding contact with it. When working, the push rod 2 can move left and right in the upper shell 3. The bracket 8 passes through the left and right surfaces of the vibration absorbing device and is rotatably connected to the vibration absorbing device through a ball bearing 9. The two ends of the bracket 8 are connected and fixed to the hydraulic shock absorber 6 through the end cover 11. The hydraulic shock absorber 6 is fixedly installed in the planetary cylinder 5. The bracket 8 can be connected to the planetary cylinder 5 through the end cover 11 and the elastic element 7 of the hydraulic shock absorber 6; the push rod 2 is welded with an upper lifting ear 1 on the end away from the planetary cylinder 5, and the lower shell 12 is welded with a lower lifting ear 13 on the side away from the planetary cylinder 5 for easy connection.

[0030] An embodiment of the vibration absorbing device will be provided below, which comprises a conical column type lead screw 4 integrated with a push rod 2, a conical column type planetary wheel 10 connected with the conical column type lead screw 4 through thread engagement, the conical column type lead screw 4 is arranged at the center of the planetary cylinder 5, the bracket 8 penetrates the left and right surfaces of the conical column type planetary wheel 10 and is rotationally connected therewith through the ball bearing 9, the conical column type planetary wheel 10 can make rotational motion in the planetary cylinder 5 around the bracket 8 under the action of the ball bearing 9, wherein the inclination angle, mass or overall size of the conical column type planetary wheel 10 can be set according to specific requirements or specific conditions; further, the conical column type planetary wheel 10 is provided with multiple groups and is arranged in a circular array around the conical column type lead screw 4 with the conical column type lead screw 4 as the center, the present application preferably adopts a design of three groups of conical column type planetary wheels 10 and a 5° inclination angle of the conical column, during work, the push rod 2 can drive the conical column type lead screw 4 to move left and right in the planetary cylinder 5, since the conical column type lead screw 4 is connected with the conical column type planetary wheel 10 through thread engagement, when the conical column type lead screw 4 moves left and right, the three conical column type planetary wheels 10 can rotate around the bracket 8, in this process, the hydraulic shock absorber 6 and the elastic element 7 make the conical column type planetary wheel 10 produce displacement in the radial direction, in detail, the contact position between the conical column type planetary wheel 10 and the conical column type lead screw 4 is changed during work, so that the lead is changed, thus the change of the mass coefficient is realized; during the movement of the conical column type lead screw 4 from the small radius end of the conical column type planetary wheel 10 to the large radius section, the contact position is changed, so that the lead of the contact point is continuously reduced, the mass coefficient of the conical column type planetary wheel 10 is continuously increased, since the conical column design makes the lead of the contact point between the conical column type planetary wheel 10 and the conical column type lead screw 4 realize stepless change, thus the stepless change of the mass coefficient is realized.

[0031] The mass coefficient of the conical column type planetary wheel 10 can be expressed as:

[0032] (1)

[0033] In the formula, P is the lead of the conical column type lead screw 4, is the density of the conical column type planetary wheel 10, is the height of the conical column type planetary wheel 10, and is the average radius of the conical column type planetary wheel 10; wherein the lead P is defined as: the distance moved on the lead screw in one revolution of the nut; that is, the effective contact position of the conical column type planetary wheel 10 and the conical column type lead screw 4 is changed with the movement of the push rod 2 with the conical column type lead screw 4, since the special shape design of the conical column is adopted, the conical column type planetary wheel 10 and the conical column type lead screw 4 have different leads P at different effective contact positions.

[0034] Formula (1) shows that the moment of inertia coefficient of the conical column planetary gear 10 can be designed to meet the requirements by selecting appropriate parameters such as the geometric size of the conical column planetary gear 10, the material density, and by selecting appropriate data such as the tilt angle and lead of the conical column screw 4, so as to control the mechanical force.

[0035] The technical solution can generate a larger inertial force with a smaller physical mass, and achieve the effect of inertia efficiency, that is, the inertance coefficient is much larger than the actual physical mass. In order to make the vibration absorption device work better and reduce the occurrence of subsequent failures, the materials of the conical column screw 4 and the conical column planetary gear 10 are zirconium or 30Cr; the threaded parts of the conical column screw 4 and the conical column planetary gear 10 are subjected to quenching treatment or iron fluoride spraying.

[0036] The working principle of the technical solution will be described in detail below: as shown in Figure 1 The upper hanging ear 1 at one end of the push rod 2 is connected to the vibration source, the lower hanging ear 13 at one side of the lower shell 12 is connected to the device requiring vibration isolation, and the planetary conical column inertance device is connected in parallel with a spring element. When vibration occurs, the vibration force acts on the push rod 2, and the conical column screw 4 moves back and forth in the planetary cylinder 5, which drives the conical column planetary gear 10 to rotate around the support 8, generating an inertial energy storage effect, that is, the vibration energy is converted into kinetic energy of the planetary gear rotation and stored. Since the conical column planetary gear 10 and the conical column screw 4 are both designed in a conical column shape, the push rod 2 moves back and forth in the planetary cylinder 5 with the conical column screw 4, thereby changing the radial distance between the conical column planetary gear 10, so as to achieve the effect of variable inertia by changing the radius and lead. Since the conical column planetary gear 10 is rotationally installed on the support 8, the support 8 is connected to the planetary cylinder 5 through the hydraulic shock absorber 6, the elastic element 7 and the end cover 11, so that the conical column planetary gear 10 can produce displacement in the radial direction.

[0037] Example 2

[0038] Different from example 1, the conical column screw 4 is redesigned in this embodiment, as shown in Figure 4As shown, the conical column type screw rod 4 is provided with two and symmetrically arranged, respectively, the driving conical column type screw rod 41 and the driven conical column type screw rod 42, the symmetrically arranged conical column type screw rod 4 is connected as a whole and one end of the conical column type screw rod 4 is connected with the push rod 2, in detail, the driving conical column type screw rod 41 is connected with the push rod 2, further, two conical column type planetary gears 10 are axially arranged on the bracket 8 and are respectively connected with two symmetrically arranged conical column type screw rods 4 through thread engagement, respectively, the first conical column type planetary gear 14 and the second conical column type planetary gear 15, the bracket 8 penetrates through the two conical column type planetary gears 10 and is rotatably connected with the conical column type planetary gears 10 through the ball bearings 9 embedded in the conical column type planetary gears 10.

[0039] In order to make the lead change more flexible, such as Figure 5 As shown, a variable angle conical column type screw rod 4 is designed, in detail, the cross section of the conical column type screw rod 4 is in the shape of a sharp shovel, the variable angle design makes the lead change more flexible, and the change of the mass coefficient can be adjusted according to the real-time working condition; at the same time, the change degree of vibration and the change degree of angle can be combined, so that the mass coefficient increases faster under more severe vibration, thereby better inhibiting and absorbing vibration.

[0040] The working principle of the embodiment will be described in detail as follows: first, the upper hanging ear 1 at one end of the push rod 2 is connected with a vibration source, the lower hanging ear 13 at one side of the lower shell 12 is connected with a device to be isolated, the planetary conical column type inertial container is connected with one or more spring elements in parallel; when vibration occurs, the vibration force acts on the push rod 2 and drives the driving conical column type lead screw 41 and the driven conical column type lead screw 42 to move back and forth in the planetary cylinder 5; when the vibration causes compression or stretching to push the driving conical column type lead screw 41 and the driven conical column type lead screw 42 to pass through the first conical column type planetary gear 14 and the second conical column type planetary gear 15, the first conical column type planetary gear 14 and the second conical column type planetary gear 15 are driven to rotate around the support 8 respectively, and the inertial energy storage effect is generated, that is, the energy of the vibration is converted into the kinetic energy of the rotation of the first conical column type planetary gear 14 and the second conical column type planetary gear 15 and is stored; since the outer shapes of the conical column type planetary gear 10 and the conical column type lead screw 4 are designed in a conical column type, when the push rod 2 drives the driving conical column type lead screw 41 and the driven conical column type lead screw 42 to move back and forth in the planetary cylinder 5, the radial distance between the first conical column type planetary gear 14 and the second conical column type planetary gear 15 is changed; when the vibration causes compression, the push rod 2 drives the conical column type lead screw 4 to compress the conical column type planetary gear 10 so that the lead of the contact point is reduced to increase the mass coefficient; when the vibration causes stretching, the push rod 2 drives the conical column type lead screw 4 to compress the conical column type planetary gear 10 so that the lead of the contact point is reduced to increase the mass coefficient; through the design of the support 8 connecting the two conical column type planetary gears 10 and the double conical column type lead screw 4, the mass coefficient of the inertial container is increased with the displacement of the push rod 2 when the inertial container is subjected to vibration, whether compression or stretching, and the mass coefficient is reduced with the displacement, so that the movement of the mechanism is further limited by increasing the parameters in the condition of large displacement; since the first conical column type planetary gear 14 and the second conical column type planetary gear 15 are connected with the support 8, the support 8 is connected with the planetary cylinder 5 through the hydraulic shock absorber 6, the elastic element 7 and the end cover 11, so that it can produce displacement in the radial direction.

[0041] The above technical solution only embodies the preferred technical solution of the technical solution of the present application, and some changes made by the person skilled in the art to some parts thereof also embody the principle of the present application and are within the protection scope of the present application.

Claims

1. A planetary conical cylindrical inertia container with variable inertia, characterized in that: The invention comprises an upper shell (3), a planetary cylinder (5) arranged on one side of the upper shell (3), a lower shell (12) arranged on a side of the planetary cylinder (5) away from the upper shell (3), a push rod (2) arranged on the upper shell (3), a vibration absorbing device connected to the push rod (2), a bracket (8) connected to the vibration absorbing device, end covers (11) arranged on both sides of the bracket (8), a hydraulic shock absorber (6) connected to the end covers (11), and an elastic element (7) arranged on the hydraulic shock absorber (6); The hydraulic shock absorber (6), elastic element (7), end cover (11), bracket (8), and vibration absorbing device are arranged in the planetary cylinder (5); the push rod (2) passes through the left and right surfaces of the upper shell (3) and is in sliding contact therewith; the bracket (8) passes through the left and right surfaces of the vibration absorbing device and is rotatably connected to the vibration absorbing device via a ball bearing (9); both ends of the bracket (8) are connected and fixed to the hydraulic shock absorber (6) via the end cover (11); and the hydraulic shock absorber (6) is fixedly installed in the planetary cylinder (5); The vibration absorbing device comprises a tapered column screw (4) connected to the push rod (2) as a whole, and a tapered column planetary wheel (10) connected to the tapered column screw (4) by threaded engagement. The tapered column screw (4) is arranged at the center of the planetary cylinder (5), and the bracket (8) passes through the left and right surfaces of the tapered column planetary wheel (10) and is rotatably connected to it via a ball bearing (9).

2. The variable inertia planetary cone-type inertia container according to claim 1, characterized in that: The conical column type planetary gears (10) are provided in multiple groups and are arranged in an annular array around the conical column type screw rod (4) with the conical column type screw rod (4) as the center.

3. A planetary conical cylindrical inertia container with variable inertia according to claim 1 or 2, characterized in that: The material of the tapered column screw rod (4) and the tapered column planetary wheel (10) is zirconium or 30Cr; the threaded parts of the tapered column screw rod (4) and the tapered column planetary wheel (10) are both quenched or sprayed with Teflon.

4. The variable inertia planetary cone-type inertia container according to claim 3, characterized in that: In the working arrangement, the planetary cone-cylinder inertia container is used in parallel with one or more spring elements.

5. The variable inertia planetary cone-type inertia container according to claim 3, characterized in that: The tapered column screw rods (4) are provided with two and are symmetrically arranged. The symmetrically arranged tapered column screw rods (4) are connected as one body and one end of the tapered column screw rod (4) is connected to the push rod (2).

6. The variable inertia planetary cone-type inertia container according to claim 5, characterized in that: Two tapered column type planetary wheels (10) are axially arranged on the bracket (8) and are respectively connected to two symmetrically arranged tapered column type screw rods (4) through threaded engagement.

7. The variable inertia planetary cone-type inertia container according to claim 6, characterized in that: The bracket (8) passes through the two conical column planetary wheels (10) and is rotationally connected thereto via ball bearings (9) embedded in the conical column planetary wheels (10).

8. The variable inertia planetary cone-type inertia container according to claim 3, characterized in that: The cross section of the tapered column screw rod (4) is in the shape of a pointed shovel.

9. The variable inertia planetary cone-type inertia container according to claim 1, characterized in that: An upper lifting lug (1) is welded to one end of the push rod (2) away from the planetary cylinder (5), and a lower lifting lug (13) is welded to one side of the lower shell (12) away from the planetary cylinder (5).

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