Rotary buffer device and rotary pair mechanism

Abstract

The present invention provides a rotary buffer device, comprising a cylinder body, a first end cover, a second end cover, an elastic cement, a first rotating shaft and a plug, wherein the second end cover, the first end cover and the cylinder body are enclosed to form a sealed cavity, the elastic cement is filled in the sealed cavity, one end of the first rotating shaft is rotatably connected to the first end cover, the other end of the first rotating shaft passes through the second end cover and extends out of the sealed cavity, the plug is accommodated in the sealed cavity, and a throttling gap is provided between the plug and the cylinder body, and the plug comprises a body and a plug flap, the body is sleeved on the first rotating shaft, and the plug flap is convexly provided on the outer peripheral wall of the body. The present invention adopts the cooperation of the plug and the elastic cement, and the elastic cement absorbs the energy generated by the external force transmitted from the first rotating shaft to the plug flap, thereby making the rotating member connected to the first rotating shaft quickly change from a high-speed rotating state to a slow rotating state, thereby effectively solving the technical problem that the energy absorption buffer device cannot be applied to the rotating equipment to realize a rapid shutdown condition under a high-speed rotating state.

Description

Technical Field

[0001] The present invention belongs to the technical field of passive safety protection devices, and more specifically, relates to a rotary buffer device and a rotary pair mechanism. Background Art

[0002] In the fields of industrial production, transportation, etc., there are a wide variety of rotating equipment, such as the tailgate ladder of landing ships, the emergency evacuation door of the subway driver's cab, etc. Due to special working conditions, the process from starting to landing is required to be completed in an extreme time (usually no more than 10 seconds). Therefore, there will be a large rotational inertia in this process, resulting in a large impact after reaching the limited position. At present, the energy absorption and buffering devices on the market can only withstand axial or radial loads. In this way, when the equipment is quickly shut down under high-speed rotation, it can usually only tolerate the existence of impact, and there is no effective energy absorption and buffering method. The direct consequence of this impact is that the life of the rotating equipment is drastically reduced, and the rotating equipment is prone to failure when it needs to be used urgently. Summary of the invention

[0003] The object of the present invention is to provide a rotary buffer device and a rotary pair mechanism, including but not limited to solving the technical problem that the energy absorption buffer device cannot be applied to the rotating equipment to achieve a rapid shutdown condition under a high-speed rotating state.

[0004] In order to solve the above technical problems, an embodiment of the present invention provides a rotation buffer device, comprising:

[0005] Cylinder body;

[0006] A first end cover, sealing one end of the cylinder body;

[0007] A second end cover is sealed on the other end of the cylinder body, wherein the second end cover, the first end cover and the cylinder body enclose a sealed cavity;

[0008] Elastic putty filled in the sealing cavity;

[0009] a first rotating shaft, one end of which is rotatably connected to the first end cover, and the other end of which passes through the second end cover and extends out of the sealing cavity; and

[0010] The plug is accommodated in the sealing cavity and has a throttling gap between the plug and the cylinder body. The plug includes a body and a plug flap. The body is sleeved on the first rotating shaft. The plug flap is convexly arranged on the outer peripheral wall of the body and is used to move the elastic putty.

[0011] Furthermore, the cock comprises:

[0012] At least two of the plug flaps are circumferentially distributed at equal intervals on the outer peripheral wall of the body.

[0013] Furthermore, a throttling hole is formed on the plug flap, and the plug flap comprises a first blocking surface and a second blocking surface which are arranged opposite to each other, and the throttling hole extends from the first blocking surface to the second blocking surface.

[0014] Further, the throttle hole extends along a cross section perpendicular to the axis of the first rotating shaft.

[0015] Furthermore, the axis of the throttle hole is a straight line or an arc.

[0016] Furthermore, there are gaps between the two opposite end surfaces of the cock and the inner end surface of the first end cover and the inner end surface of the second end cover respectively.

[0017] Furthermore, the rotation buffer device also includes:

[0018] A first sealing ring, arranged at the joint between the first end cover and the cylinder body;

[0019] A second sealing ring, disposed at the joint between the second end cover and the cylinder body; and

[0020] The third sealing ring is arranged at the joint between the first rotating shaft and the second end cover.

[0021] Furthermore, the structure of the first end cover is consistent with the structure of the second end cover.

[0022] Furthermore, the rotation buffer device also includes:

[0023] A fourth sealing ring is arranged at the joint between the first rotating shaft and the first end cover.

[0024] The beneficial effect of the rotary buffer device provided by the present invention is that a plug is used in combination with elastic putty, and the energy generated by the external force transmitted from the first rotating shaft to the plug disc is absorbed by the elastic putty, so that the rotating part connected to the first rotating shaft is quickly converted from a high-speed rotation state to a slow rotation state, thereby effectively solving the technical problem that the energy-absorbing buffer device cannot be used for the rotating equipment to achieve rapid shutdown conditions under high-speed rotation conditions, alleviating the impact on the rotating equipment when it stops rapidly under high-speed rotation conditions, and extending the service life of the rotating equipment.

[0025] The present invention also provides a rotary pair mechanism for a rotary device, comprising a second rotating shaft for connecting a rotating member, a connecting assembly and the above-mentioned rotary buffer device, wherein the second rotating shaft is connected to the first rotating shaft via the connecting assembly.

[0026] The beneficial effect of the rotating pair mechanism provided by the present invention is that: a rotating buffer device is adopted, which absorbs the energy generated by the external force transmitted from the second rotating shaft to the first rotating shaft through the cooperation of elastic putty and the plug flap, thereby making the rotating part connected to the second rotating shaft quickly change from a high-speed rotation state to a slow rotation state, thereby effectively solving the technical problem that the energy absorption buffer device cannot be used for the rotating equipment to achieve rapid shutdown conditions under high-speed rotation conditions, alleviates the impact on the rotating equipment when it stops quickly under high-speed rotation conditions, and extends the service life of the rotating equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A three-dimensional schematic diagram of a rotary pair mechanism provided in an embodiment of the present invention;

[0029] Figure 2 A schematic axial cross-sectional view of a rotary buffer device provided by an embodiment of the present invention;

[0030] Figure 3 A schematic axial cross-sectional view of a rotary buffer device provided by another embodiment of the present invention;

[0031] Figure 4 A three-dimensional schematic diagram of a cock in a rotary buffer device provided in an embodiment of the present invention;

[0032] Figure 5 for Figure 2 A schematic cross-sectional view of a rotation buffer device provided by an embodiment of the middle II direction;

[0033] Figure 6 for Figure 2 A cross-sectional schematic diagram of a rotation buffer device provided by another embodiment in the direction II;

[0034] Figure 7 for Figure 2 A cross-sectional schematic diagram of a rotation buffer device provided in another embodiment of the middle II direction.

[0035] Among them, the reference numerals in the figure are:

[0036] 1—rotational sub-mechanism, 10—rotational buffer device, 20—second rotating shaft, 30—connecting assembly, 11—cylinder body, 12—first end cover, 13—second end cover, 14—first rotating shaft, 15—cock, 101—sealing chamber, 102—throttling gap, 140—shaft shoulder, 151—main body, 152—plug flap, 161—first sealing ring, 162—second sealing ring, 163—third sealing ring, 164—fourth sealing ring, 1520—throttling hole, 1521—first blocking surface, 1522—second blocking surface. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation of this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] See also Figures 1 to 7The rotary buffer device provided by the present invention is now described. The rotary buffer device 10 comprises a cylinder body 11, a first end cover 12, a second end cover 13, an elastic cement (not shown), a first rotating shaft 14 and a cock 15, wherein the first end cover 12 is sealed at one end of the cylinder body 11; the second end cover 13 is sealed at the other end of the cylinder body 11, and the second end cover 13, the first end cover 12 and the cylinder body 11 are surrounded to form a sealed cavity 101; the elastic cement is filled in the sealed cavity 101; one end of the first rotating shaft 14 is rotatably connected to the first end cover 12, and the first rotating shaft 14 is rotatably connected to the first end cover 12. The other end of 14 passes through the second end cover 13 and extends out of the sealed cavity 101; the plug 15 is accommodated in the sealed cavity 101, and a throttling gap 102 is provided between the plug 15 and the cylinder body 11, that is, a throttling gap 102 is provided between the outer peripheral wall of the plug 15 and the inner peripheral wall of the cylinder body 11, here, the plug 15 includes a main body 151 and a plug flap 152, wherein the main body 151 is sleeved on the first rotating shaft 14, and the plug flap 152 is convexly provided on the outer peripheral wall of the main body 151, and is used to move the elastic putty.

[0040] Optionally, the plug 15 is integrally formed with the first rotating shaft 14, avoiding the trouble of connecting and positioning the plug 15 with the first rotating shaft 14; one or more plugs 15 can be sleeved on the first rotating shaft 14, and one or more plug flaps 152 can be protruded on one plug 15; a mounting groove is opened in the center of the first end cover 12, one end of the first rotating shaft 14 extends into the mounting groove and is rotatably connected to the first end cover 12, or a mounting hole is opened in the center of the first end cover 12, one end of the first rotating shaft 14 extends into the mounting hole and is rotatably connected to the first end cover 12; the elastic putty is composed of polysiloxane, filler, compressive agent and plasticizer, etc., and is a High-viscosity, compressible, flowable, unvulcanized silicone compounds have high stability in the range of -80℃ to 250℃, and are odorless, non-toxic, and do not pollute the environment and personnel. They can consume and store energy in proportion to the actual working conditions. When the elastic putty moves under the action of external force, since the movement of the molecular segments and the entire molecular chain of polysiloxane has to overcome great resistance, it can generate extremely strong viscous friction, thereby absorbing the energy generated by the external force and converting part of the energy into heat energy, thereby consuming external energy and reducing the amplitude of vibration, that is, achieving the purpose of vibration reduction and buffering by generating damping effect.

[0041] In order to better illustrate the working principle of the rotary buffer device 10, the emergency evacuation door of the subway driver's cab is taken as an example for explanation: the top of the emergency evacuation door is fastened to the car body through a lock, and the bottom of the emergency evacuation door is rotatably connected to the car body through a second rotating shaft 20. When an emergency occurs, the lock is opened, and the emergency evacuation door drives the second rotating shaft 20 to rotate freely under the action of gravity. When it is not connected to the rotary buffer device 10, the emergency evacuation door can only stop after a violent collision with the ground; if the emergency evacuation door is about to touch the ground, the rotary buffer device 10 installed on the car body is rotated through a gear group Or a coupling or other connecting component 30 is connected to the second rotating shaft 20, the first rotating shaft 14 of the rotary buffer device 10 will rotate under the drive of the second rotating shaft 20, and drive the plug 152 of the plug 15 to apply thrust to the elastic putty in the cylinder body 11, so that the elastic putty will flow around the first rotating shaft 14, so that the elastic putty will generate viscous friction during the flow process to absorb the energy generated by the thrust, so that the second rotating shaft 20 can be quickly transformed from a high-speed rotation state to a slow rotation state, so as to drive the emergency evacuation door to land smoothly on the ground, avoiding the emergency evacuation door from violently colliding with the ground.

[0042] The rotary buffer device 10 provided by the present invention adopts a plug 15 in combination with an elastic putty, and the energy generated by the external force transmitted from the first rotating shaft 14 to the plug flap 152 is absorbed by the elastic putty, so that the rotating part connected to the first rotating shaft 14 is quickly converted from a high-speed rotation state to a slow rotation state, thereby effectively solving the technical problem that the energy-absorbing buffer device cannot be used for the rotating equipment to achieve rapid shutdown conditions under high-speed rotation conditions, alleviating the impact on the rotating equipment when it is quickly shut down under high-speed rotation conditions, and extending the service life of the rotating equipment.

[0043] For further information, see Figures 5 to 7 As a specific embodiment of the rotary buffer device provided by the present invention, the plug 15 includes at least two plug petals 152, and at least two plug petals 152 are circumferentially distributed at equal intervals on the outer peripheral wall of the main body 151, that is, two or more plug petals 152 are circumferentially distributed at equal intervals along the outer peripheral wall of the main body 151, so that the external force transmitted by the first rotating shaft 14 can be more evenly applied to the elastic putty, thereby making the reaction force of the elastic putty act more evenly on the plug petals 152.

[0044] For further information, see Figures 2 to 7As a specific embodiment of the rotary buffer device provided by the present invention, a throttle hole 1520 is opened on the plug flap 152, and the plug flap 152 includes a first blocking surface 1521 and a second blocking surface 1522 that are relatively arranged, and the throttle hole 1520 extends from the first blocking surface 1521 to the second blocking surface 1522, that is, the throttle hole 1520 passes through the first blocking surface 1521 and the second blocking surface 1522, for allowing the elastic putty to flow through. No matter when the first rotating shaft 14 is driven by external force to rotate clockwise, the second blocking surface 1522 pushes the elastic putty, or when the first rotating shaft 14 is driven by external force to rotate counterclockwise, the first blocking surface 1521 pushes the elastic putty, the elastic putty will be elastically compressed and generate damping force at the throttle hole 1520 and the throttle gap 102, that is, when the instantaneous flow velocity of the elastic putty flowing through the throttle hole 1520 and the throttle gap 102 increases, the damping force at the throttle hole 1520 and the throttle gap 102 will increase to absorb the energy generated by the external force, so that the throttle hole 1520 can cooperate with the throttle gap 102 to increase the damping effect on the plug 152, thereby effectively improving the energy absorption and buffering effect of the elastic putty.

[0045] For further information, see Figures 5 to 7 As a specific embodiment of the rotary buffer device provided by the present invention, the throttle hole 1520 extends along a cross section perpendicular to the axis of the first rotating shaft 14, so that the damping force generated when the elastic putty flows through the throttle hole 1520 always remains perpendicular to the axis of the first rotating shaft 14, avoiding unbalanced load during the energy absorption process. The unbalanced load refers to the damping force that is not perpendicular to the axis of the first rotating shaft 14 or cannot keep the first rotating shaft 14 in the reverse rotation trend, causing the first rotating shaft 14 to shake, resulting in accelerated wear of the first rotating shaft 14 and the first end cover 12 and the second end cover 13, thereby extending the service life of the rotary buffer device 10.

[0046] For further information, see Figures 5 to 7 As a specific embodiment of the rotary buffer device provided by the present invention, the axis of the throttle hole 1520 is a straight line or an arc, that is, the throttle hole 1520 is a straight hole or an arc hole, which is conducive to the production and processing of the throttle hole 1520 and can prevent the divergence of the damping force direction to cause eccentric loading.

[0047] For further information, see Figure 2 and Figure 3As a specific embodiment of the rotary buffer device provided by the present invention, there is a gap between the two opposite end faces of the plug 15 and the inner end face of the first end cover 12 and the inner end face of the second end cover 13. Specifically, there are two positioning shoulders on the first rotating shaft 14, and the two positioning shoulders respectively abut against the inner end face of the first end cover 12 and the inner end face of the second end cover 13 to limit the plug 15 in the middle of the sealing cavity 101, so that the gap between the two opposite end faces of the plug 15 and the inner end face of the first end cover 12 and the inner end face of the second end cover 13 can be filled with elastic putty, providing sufficient recovery space for the elastic putty, so that there is no need for an additional reset adjustment structure, and the elastic putty can be started instantly in any state, that is, any stop position after the work is completed can be used as the starting position for the next work.

[0048] For further information, see Figure 2 and Figure 3 As a specific embodiment of the rotary buffer device provided by the present invention, the rotary buffer device 10 also includes a first sealing ring 161, a second sealing ring 162 and a third sealing ring 163, wherein the first sealing ring 161 is arranged at the joint between the first end cover 12 and the cylinder body 11, the second sealing ring 162 is arranged at the joint between the second end cover 13 and the cylinder body 11, and the third sealing ring 163 is arranged at the joint between the first rotating shaft 14 and the second end cover 13. Specifically, a first accommodating groove (not marked) is formed on the outer peripheral wall of the first end cover 12, the inner surface of the first sealing ring 161 extends into the first accommodating groove and abuts against the groove wall of the first accommodating groove, and the outer surface of the first sealing ring 161 abuts against the inner peripheral wall of the cylinder body 11; a second accommodating groove (not marked) is formed on the outer peripheral wall of the second end cover 13, the inner surface of the second sealing ring 162 extends into the second accommodating groove and abuts against the groove wall of the second accommodating groove, and the outer surface of the second sealing ring 162 abuts against the inner peripheral wall of the cylinder body 11; A second through hole is provided on the cover 13, and the first rotating shaft 14 is passed through the second through hole. A third accommodating groove (not marked) is provided on the hole wall of the second through hole. The outer surface of the third sealing ring 163 extends into the third accommodating groove and abuts against the groove wall of the third accommodating groove. The inner surface of the third sealing ring 163 abuts against the outer peripheral wall of the first rotating shaft 14. In this way, the first sealing ring 161 and the second sealing ring 162 realize static sealing, and the third sealing ring 163 realizes dynamic sealing, thereby ensuring the sealing effect of the sealing chamber 130 and effectively preventing the elastic putty from leaking.

[0049] For further information, see Figure 3 As a specific embodiment of the rotary buffer device provided by the present invention, the structure of the first end cover 12 is consistent with the structure of the second end cover 13, that is, the first end cover 12 and the second end cover 13 can be made by the same mold, which is conducive to improving the efficiency of end cover design and processing and reducing the production cost of the rotary buffer device 10.

[0050] For further information, see Figure 3 As a specific embodiment of the rotary buffer device provided by the present invention, the rotary buffer device 10 further includes a fourth sealing ring 164, which is arranged at the joint between the first rotating shaft 14 and the first end cover 12. Specifically, a first through hole is provided on the first end cover 12, and the first through hole is provided for the first rotating shaft 14 to pass through. A fourth receiving groove (not marked) is provided on the hole wall of the first through hole. The outer surface of the fourth sealing ring 164 extends into the fourth receiving groove and abuts against the groove wall of the fourth receiving groove. The inner surface of the fourth sealing ring 164 abuts against the outer peripheral wall of the first rotating shaft 14. In this way, the fourth sealing ring 164 realizes dynamic sealing, and cooperates with the first sealing ring 161, the second sealing ring 162 and the third sealing ring 163 to ensure the sealing effect of the sealing cavity 101, and effectively prevent the elastic putty from leaking out.

[0051] See also Figures 1 to 7 The present invention also provides a rotational pair mechanism 1 for a rotating device, comprising a rotation buffer device 10, a second rotating shaft 20 and a connecting assembly 30, wherein the second rotating shaft 20 is used to connect the rotating member, and the second rotating shaft 20 is connected to the first rotating shaft 14 through the connecting assembly 30. Here, the rotating member is a component of the rotating device, specifically a component that needs to achieve rapid shutdown under high-speed rotation, the second rotating shaft 20 is tightly connected to the rotating member, and the connecting assembly 30 is a coupling or a gear set, etc.

[0052] The rotary sub-mechanism 1 provided by the present invention adopts a rotary buffer device 10, which absorbs the energy generated by the external force transmitted from the second rotating shaft 20 to the first rotating shaft 14 through the cooperation of elastic putty and the plug 152, so that the rotating part connected to the second rotating shaft 20 is quickly converted from a high-speed rotation state to a slow rotation state, thereby effectively solving the technical problem that the energy absorption buffer device cannot be used for the rotating equipment to achieve rapid shutdown conditions under high-speed rotation conditions, alleviates the impact on the rotating equipment when it stops quickly under high-speed rotation conditions, and extends the service life of the rotating equipment.

[0053] The above are only optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A rotary buffer device, characterized in that: include: Cylinder body; A first end cover is sealed on one end of the cylinder body, and a mounting groove is provided in the center of the first end cover; A second end cover is sealed on the other end of the cylinder body, wherein the second end cover, the first end cover and the cylinder body enclose a sealed cavity; Elastic putty filled in the sealing cavity; a first rotating shaft, one end of which is rotatably connected to the first end cover, and the other end of which passes through the second end cover and extends out of the sealing cavity; as well as A plug is accommodated in the sealing cavity and has a throttling gap with the cylinder body, and the plug comprises a body and a plug flap, the body is sleeved on the first rotating shaft, and the plug flap is convexly arranged on the outer peripheral wall of the body and is used to move the elastic putty; There are gaps between the two opposite end surfaces of the cock and the inner end surface of the first end cover and the inner end surface of the second end cover respectively; Elastic putty can be started instantly in any state, that is, any stop position after the work is completed can be used as the starting position for the next work; The stopcock comprises: At least two of the plug flaps are circumferentially distributed at equal intervals on the outer peripheral wall of the body.

2. The rotary buffer device according to claim 1, characterized in that: A throttling hole is formed on the plug flap, and the plug flap comprises a first blocking surface and a second blocking surface which are arranged opposite to each other, and the throttling hole extends from the first blocking surface to the second blocking surface.

3. The rotary buffer device according to claim 2, characterized in that: The throttle hole extends along a cross section perpendicular to the axis of the first rotating shaft.

4. The rotary buffer device according to claim 3, characterized in that: The axis of the throttle hole is a straight line or an arc.

5. The rotary buffer device according to any one of claims 1 to 4, characterized in that: Also includes: A first sealing ring, arranged at the joint between the first end cover and the cylinder body; A second sealing ring, arranged at the joint between the second end cover and the cylinder body; as well as The third sealing ring is arranged at the joint between the first rotating shaft and the second end cover.

6. The rotary buffer device according to claim 5, characterized in that: The structure of the first end cover is consistent with that of the second end cover.

7. The rotary buffer device according to claim 6, characterized in that: Also includes: A fourth sealing ring is arranged at the joint between the first rotating shaft and the first end cover.

8. A rotary pair mechanism, used for rotating equipment, characterized in that: It comprises a second rotating shaft for connecting a rotating member, a connecting assembly and the rotary buffer device according to any one of claims 1 to 7, wherein the second rotating shaft is connected to the first rotating shaft through the connecting assembly.

Images