CN112855834A

CN112855834A - Strong impact resistant bottom shock absorber

Info

Publication number: CN112855834A
Application number: CN202110128410.4A
Authority: CN
Inventors: 程昌利; 吴剑超
Original assignee: Wuxi Jiangda Vibration Isolator Co ltd
Current assignee: Wuxi Jiangda Vibration Isolator Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-05-28
Anticipated expiration: 2041-01-29
Also published as: CN112855834B

Abstract

The invention provides a strong impact resistant bottom shock absorber, which comprises a shell, wherein a central shaft, a damping part and a spring are arranged in the shell, one end of the central shaft is opened, the interior of the central shaft is hollow, the other end of the central shaft penetrates through the top of the shell, the spring is arranged in the central shaft and used for buffering external impact force, and the damping part is arranged at the lower side of the central shaft and is contacted with the inner wall of the shell; the damping piece top is equipped with the baffle, place the dish spring on the baffle, be connected with the clamp plate on the center pin, the clamp plate can be followed the center pin up-and-down motion and changed the deformation volume of dish spring, the damping piece is restricted between baffle and center pin bottom. When the shock absorber resonates, the generated friction force between the baffle plate and the damping piece restrains the resonance, and the load of the shock absorber can be changed under the condition that the appearance structure is not changed.

Description

Strong impact resistant bottom shock absorber

Technical Field

The invention relates to the field of shock absorbers, in particular to a strong impact resistant bottom shock absorber.

Background

Modern wars rely heavily on advanced electronics and electronics technology. Whether the electronic equipment installed on various transport tools can work stably and reliably in complex and changeable environments plays a significant role in ensuring the victory of war.

The display and control console is used as the key for monitoring the ships, firstly, the reliability under the dynamic environment and the capability of resisting the severe environment are ensured, and meanwhile, the performance indexes of electric appliances of the display and control console are required to be met.

The display and control console applied to the ship is inevitably influenced by various impacts and vibrations (regular and irregular) and electronic equipment in the process of traveling or wartime. Among the various influences, the impact and vibration have the greatest influence on the electronic device: sometimes, the functions of the internal components of the electronic equipment are reduced, and even the internal components of the electronic equipment completely fail.

The resonance peak-free vibration absorber can effectively inhibit resonance, and the resonance area is not amplified, so that the probability that the electronic equipment is damaged or even loses efficacy is reduced.

Most of shock absorbers without resonance peaks used in the prior military electronic equipment adopt a modular structure, the resonance is inhibited by spring pieces, and the spring pieces lose the damping effect after being out of work.

The utility model discloses a utility model patent that publication number is CN204512269U provides a no resonance peak anti strong impact type isolator, adopts damping friction ring and last awl chamber or produce the friction between the awl chamber down and restrain resonance to compress disc spring, the resetting of the attenuator of being convenient for, nevertheless this structure adopts the part more, and relative motion is more between each part, and the attenuator wearing and tearing speed is fast, also the dead phenomenon of card easily appears.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the anti-strong-impact bottom shock absorber which achieves vibration attenuation without resonance peak by means of transverse and longitudinal damping and realizes the adjustment of the damping. The technical scheme adopted by the invention is as follows:

a strong impact resistant bottom shock absorber comprises a shell, wherein a central shaft, a damping part and a spring are arranged in the shell, one end of the central shaft is open, the interior of the central shaft is hollow, the other end of the central shaft penetrates through the top of the shell, the spring is arranged in the central shaft and used for buffering external impact force, and the damping part is arranged on the lower side of the central shaft and is in contact with the inner wall of the shell;

the damping piece top is equipped with the baffle, place the dish spring on the baffle, be connected with the clamp plate on the center pin, the clamp plate can be followed the center pin up-and-down motion and changed the deformation volume of dish spring, the damping piece is restricted between baffle and center pin bottom.

Furthermore, the damping piece comprises a friction plate sleeved on the central shaft, the inner surface of the friction plate is attached to the central shaft through an inner guide belt, an outer guide belt is sleeved on the outer surface of the friction plate, and the outer guide belt is tightly attached to the inner wall of the outer shell.

Furthermore, an annular cavity is formed in the inner surface of the friction plate, an annular groove is formed in the side face of the central shaft, and the inner guide belt is limited inside the cavity and the annular groove at the opposite positions.

Furthermore, the outer surface of the central shaft is provided with an external thread section, and the inner surface of the pressure plate is provided with an internal thread and is in threaded connection with the central shaft through the external thread section.

Further, the top of the central shaft is connected with an adjusting piece for adjusting the bearing capacity of the spring.

Furthermore, the adjusting part comprises an adjusting screw and an adjusting nut, the adjusting screw penetrates through the top of the central shaft and rotates around the axis of the central shaft, the adjusting nut is screwed on the adjusting screw and moves up and down along with the rotation of the adjusting screw, and the top of the spring is in contact with the bottom of the adjusting nut.

Furthermore, the side surface of the adjusting nut is connected with a limiting part, the side surface of the central shaft is processed with a sliding groove, and one end of the limiting part extends into the sliding groove.

Furthermore, an adjusting flange matched with the adjusting screw rod is arranged at the top of the central shaft, and the adjusting screw rod rotates along with the rotation of the adjusting flange.

Further, the shell comprises a lower shell and an upper cover, and the upper cover and the lower shell are in threaded connection.

Further, the downside is equipped with the bottom cushion socket in the shell, and the upside is equipped with the top cushion socket, still be equipped with the top gasket between top cushion socket and the shell top inner wall, the laminating of center pin outer peripheral face and top gasket inner wall.

The invention has the advantages that:

1. the damping in the transverse direction and the longitudinal direction is provided, the aim of inhibiting vibration is achieved, the response of the equipment is not larger than the excitation all the time in a specified frequency range, and a resonance-free phenomenon is formed.

2. The baffle is in plane contact with the damper, the contact area is the largest, the positive pressure between the baffle and the damping part is changed by the elastic force generated by deformation of the disc spring, so that the size of the transverse damping is adjusted, in addition, relative displacement parts are few, and the phenomenon of blocking cannot occur.

3. The overall dimension of the whole device is unchanged when the compression amount of the spring is adjusted in a rotating mode, so that under the condition that external loads are changed, different bearing capacities can be obtained by directly adjusting the compression amounts of the internal spring and the disc spring, accurate control is achieved, special requirements on external spaces do not exist, and the applicability is strong.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a cross-sectional view of fig. 2.

Figure 4 is a perspective view of a mandrel according to the present invention.

Figure 5 is a front view of the mandrel of the present invention.

FIG. 6 is a waveform of the test of the present invention.

FIG. 7 is a graph of the decay rate of the test of the present invention.

In the figure: 1-lower shell, 2-upper cover, 3-central shaft, 4-adjusting screw, 5-adjusting flange, 6-limiting piece, 7-sliding chute, 8-adjusting nut, 9-pressing plate, 10-disc spring, 11-baffle, 12-inner guide belt, 13-friction plate, 14-outer guide belt, 15-cavity, 16-bottom buffer seat, 17-top buffer seat, 18-top gasket, 19-spring, 301-outer thread section, 302-central base, 303-annular groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-5, the present invention provides a strong impact resistant bottom shock absorber, which comprises a housing, wherein a central shaft 3, a damping member and a spring 19 are arranged in the housing, one end of the central shaft 3 is open and the interior of the central shaft is hollow, the other end of the central shaft penetrates through the top of the housing, the spring 19 is arranged in the central shaft 3 for buffering external impact force, and the damping member is arranged at the lower side of the central shaft 3 and is in contact with the inner wall of the housing;

the top of the damping part is provided with a baffle plate 11, a disc spring 10 is arranged on the baffle plate 11, a pressing plate 9 is connected on the central shaft 3, the pressing plate 9 can move up and down along the central shaft 3 to change the deformation quantity of the disc spring 10, and the damping part is limited between the baffle plate 11 and the bottom of the central shaft 3. Specifically, the baffle 11 is provided with a groove capable of accommodating the disc spring 10, the disc spring 10 is hidden in the groove, the outer diameter of the pressing plate 9 is smaller than the diameter of the groove, when the pressing plate 9 moves downwards, the disc spring 10 can be stably pressed into the groove, the bottom of the central shaft 3 is turned outwards to form a central base 302, and the contact surfaces between the friction plate 13 and the pressing plate 9 as well as the central base 302 are planes.

The damping piece comprises a friction plate 13 sleeved on the central shaft 3, the inner surface of the friction plate 13 is attached to the central shaft 3 through an inner guide belt 12, an outer guide belt 14 is sleeved on the outer surface of the friction plate 13, the outer guide belt 14 is attached to the inner wall of the shell, in practice, the friction plate 13 is formed by combining two half friction plates, the two half friction plates are connected through a hoop, the hoop outwards expands to provide outwards thrust for the friction plate 13, so that the outer guide belt 14 is extruded on the inner wall of the shell, when external force is applied, the central shaft 3 drives the whole damping piece to move, and the outer guide belt 14 slides on the inner wall of the shell to provide constant damping.

In this embodiment, the inner surface of the friction plate 13 is provided with an annular cavity 15, the side surface of the center shaft 3 is provided with an annular groove 303, and the cavity 15 and the annular groove 303 are located opposite to each other to confine the inner guide belt 12 therein. Specifically, the inner guide belt 12 and the outer guide belt 14 are made of high-damping polymer materials, have good stability and play a role in buffering.

The outer surface of the central shaft 3 is provided with an external thread section 301, the inner surface of the pressure plate 9 is provided with an internal thread, and the pressure plate is screwed with the central shaft 3 through the external thread section 301. Specifically, the external thread section 301 is located on the upper side of the annular groove 303, a step is left between the external thread section 301 and the annular groove 303, the width of the step is the same as the width of the bottom of the baffle plate 11, positioning of the baffle plate 11 is facilitated, when the shock absorber resonates, relative sliding between the friction plate 13 and the baffle plate 11 provides friction force, resonance is suppressed, the compression amount of the disc spring 10 is changed by rotating the pressure plate 9, and then positive pressure between the baffle plate 11 and the friction plate 13 is changed, so that the magnitude of the friction force is changed under the same friction coefficient, and the bearing capacity is adjusted.

The top of the central shaft 3 is connected with an adjusting piece for adjusting the bearing capacity of the spring 19, the adjusting piece comprises an adjusting screw rod 4 and an adjusting nut 8, the adjusting screw rod 4 penetrates through the top of the central shaft 3 and rotates around the axis of the central shaft, the adjusting nut 8 is in threaded connection with the adjusting screw rod 4 and moves up and down along with the rotation of the adjusting screw rod 4, and the top of the spring 19 is in contact with the bottom of the adjusting nut 8. The side of the adjusting nut 8 is connected with a limiting part 6, the side of the central shaft 3 is processed with a sliding groove 7, and one end of the limiting part 6 extends into the sliding groove 7. Specifically, be equipped with an annular boss on adjusting screw 4, there is a type of protruding groove that runs through the setting at center pin 3 top, annular boss assembly is at type of protruding inslot, make adjusting screw 4's top just can wear out center pin 3, thereby when rotating adjusting screw 4 outside center pin 3, adjusting screw 4 rotates in situ, under the restriction of locating part 6, adjusting nut 8 is for adjusting screw 4 longitudinal movement, and drive locating part 6 and slide in spout 7, thereby change the distance of adjusting nut 8 and shell bottom, reach the purpose of regulating spring 19 compression capacity, realize changing the compression capacity under the condition that does not change external structure and height, then adjust the load capacity of shock absorber, do not establish other restrictions to installation occasion and installation space.

As an embodiment of the present application, the limiting member 6 is a pin, a screw rod, or another rod-shaped or strip-shaped limiting member, and is used for limiting the rotation of the adjusting nut 8, so that the adjusting nut can smoothly move up and down along the surface of the adjusting screw rod 4.

In this embodiment, the top of the central shaft 3 is provided with an adjusting flange 5 which is matched with the adjusting screw rod 4, and the adjusting screw rod 4 rotates along with the rotation of the adjusting flange 5. Specifically, the top of the adjusting screw rod 4 is provided with an assembling portion with a certain height, and an opening with the same shape as the assembling portion is processed in the middle of the adjusting flange 5, so that the opening on the adjusting flange 5 can drive the adjusting screw rod 4 to rotate when being sleeved on the assembling portion, and only the adjusting flange 5 needs to be sleeved on the adjusting nut 8 when the shock absorber and the display console are connected, so that other fixing steps or connecting steps are not needed, and the installation procedure is saved.

As other embodiments of the present application, the adjusting flange 5 and the adjusting screw rod 4 are fixedly connected by a pin or a key, and the rotating function of the adjusting screw rod 4 can be realized as well.

As other embodiments of the application, a wrench groove matched with a wrench is machined in the side face of the adjusting flange 5, and the adjusting flange 5 can be rotated when the wrench is clamped into the wrench groove. Particularly, the same wrench grooves are machined in the positions, corresponding to the wrench grooves, of the side face of the top of the central shaft 3, and therefore the wrench grooves can be conveniently withdrawn.

In this embodiment, the housing includes a lower housing 1 and an upper cover 2, the upper cover 2 is screwed with the lower housing 1, specifically, an external thread is processed on the upper side of the outer surface of the lower housing 1, an internal thread is processed on the inner surface of the upper cover 2, and an opening for the central shaft 3 to pass through and be coaxial with the central shaft 3 is further provided on the top of the upper cover 2.

In this embodiment, the lower side is equipped with bottom buffing pad 16 in the shell, and the upside is equipped with top buffing pad 17, still is equipped with top gasket 18 between top buffing pad 17 and the shell top inner wall, and the laminating of center pin 3 outer peripheral face and top gasket 18 inner wall. Specifically, lower casing 1 top inner wall is equipped with a conical recess, and the maximum diameter of top blotter is between the maximum diameter and the minimum diameter of conical recess to block the top blotter, play limiting displacement, in addition, when connecting upper cover 2 and lower casing 1 soon after overlapping top gasket 18 on center pin 3, top gasket 18 is extruded by 2 top surfaces of upper cover and top cushion socket 17 gradually, plays sealed effect, avoids debris to get into in the shell.

As an embodiment of the present invention, the bottom buffer seat 16, the upper buffer seat 17 and the top gasket are made of high damping polymer material.

The assembling process comprises the following steps:

firstly, a bottom buffer seat 16 is placed in a lower shell 1, then a sleeved spring 19, an adjusting piece and a central shaft 3 are placed, an inner guide belt 12 is clamped in an annular groove 303 on the central shaft 3, a damping piece consisting of an assembled friction plate 13, a hoop and an outer guide belt 14 is compressed by using equipment and then is placed in the central shaft 3, then a baffle plate 11 and a disc spring 10 are sequentially placed, a pressing plate 9 is screwed at an outer thread section 301 on the central shaft 3 to enable the pressing plate to extrude the disc spring 10 to realize elastic deformation, then a top buffer seat 17 and a top gasket 18 are placed, an upper cover 2 is screwed on the lower shell 1, and finally an adjusting flange 5 is placed to complete the assembly of the shock absorber.

The testing process comprises the following steps:

connecting a display and control console of the real machine with a shock absorber, and testing in three aspects of vibration frequency sweep, jolt vibration and impact; the display and control console and the shock absorber are connected on the horizontal and vertical vibration platforms during vibration frequency sweep and pitch vibration tests, and the natural frequency, the amplification factor and the attenuation rate of the vibration platform are observed during the tests; the standard mounting bracket which is horizontal and inclined by 30 degrees is adopted for impact test, 6 impacts are applied to the shock absorber sample piece totally, the impact is divided into three groups I, II and III, each group impacts for 2 times, and in each group of impact of the sample machine, one impact is horizontally mounted, the other impact is obliquely mounted, the impact attenuation rate and the amplification factor are observed during test, and the obtained test result and the attenuation rate are shown in fig. 6 and 7.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. The utility model provides an anti strong impact bottom shock absorber, includes the shell, its characterized in that: a central shaft (3), a damping piece and a spring (19) are arranged in the shell, one end of the central shaft (3) is open, the interior of the central shaft is hollow, the other end of the central shaft penetrates through the top of the shell, the spring (19) is arranged in the central shaft (3) and used for buffering external impact force, and the damping piece is arranged on the lower side of the central shaft (3) and is in contact with the inner wall of the shell;

the damping piece top is equipped with baffle (11), place dish spring (10) on baffle (11), be connected with clamp plate (9) on center pin (3), the deformation volume of dish spring (10) can be changed along center pin (3) up-and-down motion in clamp plate (9), the damping piece is restricted between baffle (11) and center pin (3) bottom.

2. The high impact bottom shock absorber according to claim 1, wherein: the damping piece is including friction disc (13) of cover on center pin (3), laminate mutually through interior guiding band (12) between friction disc (13) internal surface and center pin (3), outer guiding band (14) are established to friction disc (13) surface cover, outer guiding band (14) and shell inner wall hug closely.

3. The high impact bottom shock absorber according to claim 2, wherein: the inner surface of the friction plate (13) is provided with an annular cavity (15), the side surface of the central shaft (3) is provided with an annular groove (303), and the inner guide belt (12) is limited in the cavity (15) and the annular groove (303) at opposite positions.

4. The high impact bottom shock absorber according to claim 1, wherein: the outer surface of the central shaft (3) is provided with an external thread section (301), the inner surface of the pressure plate (9) is processed with internal threads, and the pressure plate is connected with the central shaft (3) in a threaded mode through the external thread section (301).

5. The high impact bottom shock absorber according to claim 1, wherein: the top of the central shaft (3) is connected with an adjusting piece for adjusting the bearing capacity of the spring (19).

6. The high impact bottom shock absorber according to claim 5, wherein: the adjusting part comprises an adjusting screw rod (4) and an adjusting nut (8), the adjusting screw rod (4) penetrates through the top of the central shaft (3) and rotates around the axis of the central shaft, the adjusting nut (8) is in threaded connection with the adjusting screw rod (4) and moves up and down along with the rotation of the adjusting screw rod (4), and the top of the spring (19) is in contact with the bottom of the adjusting nut (8).

7. The high impact bottom shock absorber according to claim 6, wherein: the adjusting nut (8) side is connected with locating part (6), center pin (3) side processing has spout (7), locating part (6) one end stretches into in spout (7).

8. The high impact bottom shock absorber according to claim 6, wherein: the top of the central shaft (3) is provided with an adjusting flange (5) matched with the adjusting screw rod (4), and the adjusting screw rod (4) rotates along with the rotation of the adjusting flange (5).

9. The high impact bottom shock absorber according to claim 1, wherein: the shell comprises a lower shell (1) and an upper cover (2), wherein the upper cover (2) is in threaded connection with the lower shell (1).

10. The high impact bottom shock absorber according to claim 1, wherein: the utility model discloses a well casing, including shell, center pin (3), upside, top buffer seat (17), top gasket (18) still are equipped with between shell top inner wall, center pin (3) outer peripheral face and the laminating of top gasket (18) inner wall.