Damper with damping adjusting device

Abstract

The utility model relates to a damper with a damping adjusting device, which belongs to the technical field of dampers and comprises a shell, an inner cylinder is fixed on the inner wall of the shell, a piston component is arranged on the inner wall of the inner cylinder, a chassis component is arranged on the inner wall of the inner cylinder, and an adjusting mechanism is arranged at the bottom of the shell. The adjusting mechanism comprises a fixing frame and a fixing plate which are fixed to the shell, a stepping motor is fixed to the bottom of the fixing frame, a worm is fixed to an output shaft of the stepping motor, the worm is rotationally connected with the fixing plate, the bottom of the shell is in threaded connection with a rotating shaft, and the front face of the worm is meshed with a worm wheel. According to the damper with the damping adjusting device, the adjusting mechanism is started, the adjusting mechanism limits the flow of damping oil passing through the chassis assembly, so that first-stage damping is achieved, the damping oil extrudes nitrogen after entering the cavity to achieve second-stage damping, the damping stability can be guaranteed through the adjusting mode, meanwhile, the damping size is linearly adjusted, and the application range of the damper is wider; and the use effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a damper with a damping adjustment device. Background Art

[0002] A damper is a device that reduces vibration or motion amplitude by consuming energy. Its main function is to reduce vibration and impact in mechanical systems, protect mechanical systems and products, and improve production efficiency and quality. Dampers are widely used in various fields, including aerospace, military industry, construction, automobiles, etc.

[0003] As the use of dampers becomes increasingly complex, their emphases are also different. For example, a Chinese patent (publication number: CN214331318U) discloses a damper, including an upper fixed cover, a lower fixed seat, an inner shaft, an elastic member and an outer shell, the upper end of the elastic member abuts against the upper fixed cover, the elastic member abuts against the inner wall of the bottom of the lower fixed seat, the outer shell is sleeved outside the upper fixed cover and the lower fixed seat, damping oil is filled between the lower fixed seat and the inner shaft, and coolant is filled between the outer shell and the lower fixed seat. The lower fixed seat of the utility model is rigidly connected to the milling head processing equipment, and cooling oil or water flows between the outer shell and the lower fixed seat to suppress the heat of the damper from being transferred to the milling head processing equipment and affecting the accuracy. When the milling head processing equipment rotates or vibrates, the inner shaft and the elastic member move up and down accordingly, and under the action of the damping oil, the vibration generated by the milling head processing equipment is eliminated. The utility model has a simple structure and a reasonable design and can be adapted to the milling head processing equipment.

[0004] The upper fixing cover of the device is buckled on the lower fixing seat, the inner shaft is installed in the lower fixing seat, the elastic member is sleeved on the outside of the inner shaft, the upper end of the elastic member is in contact with the upper fixing cover, the elastic member is in contact with the inner wall of the bottom of the lower fixing seat, the outer shell is sleeved on the upper fixing cover and the outside of the lower fixing seat, and the space between the lower fixing seat and the inner shaft is filled with damping oil to achieve damping and shock absorption. However, the device cannot adjust the damping size, and too high damping may cause the system to respond slowly or even cause system instability, while too low damping may make the system too sensitive. When faced with complex changing situations, it cannot fully absorb shock, thereby damaging the machine, affecting the overall stability, and greatly increasing maintenance costs. Therefore, a damper with a damping adjustment device is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a damper with a damping adjustment device, which has the advantages of being able to actively adjust the damping, and solves the problem that the damping of the damper is constant and the damping cannot be adjusted.

[0006] To achieve the above object, the utility model provides the following technical solution: a damper with a damping adjustment device, comprising a shell, an inner cylinder is fixed to the top of the inner wall of the shell, a piston assembly is provided on the inner wall of the inner cylinder, a chassis assembly is provided on the bottom of the inner wall of the inner cylinder, and an adjustment mechanism for adjusting the damping size is provided at the bottom of the shell;

[0007] The adjustment mechanism comprises a fixing frame and a fixing plate fixed to the bottom of the housing, a stepping motor is fixed to the bottom of the fixing frame, a worm is fixed to the output shaft of the stepping motor, the other end of the worm is rotatably connected to the fixing plate through a stable bearing, a rotating shaft penetrating into the inner cavity of the housing is threadedly connected to the bottom of the housing, a worm wheel is meshed on the front of the worm wheel, and the bottom of the rotating shaft penetrates the worm wheel and is movably connected to the inner wall of the axis of the worm wheel;

[0008] The outer surface of the rotating shaft is fixed with threads and driven teeth in sequence from top to bottom, the bottom of the housing is provided with a through hole for the rotating shaft to pass through and connected with the rotating shaft thread, and the inner surface of the worm wheel is fixed with driven teeth adapted to the driving teeth.

[0009] Furthermore, the piston assembly includes a moving rod that passes through the top surface of the shell and is movably connected to the shell, a moving disk movably connected to the inner wall of the inner cylinder is fixed to the bottom of the moving rod, a baffle is fixed to the outer surface of the moving rod, a compression spring is fixed to the bottom of the baffle, and a pressure plate that fits the top surface of the moving disk movably connected to the inner wall of the inner cylinder is fixed to the bottom of the compression spring.

[0010] Furthermore, a through hole is provided on the top of the shell, a sealing ring is fixed on the inner wall of the through hole, the inner ring of the sealing ring is movably connected to the moving rod, and a plurality of inlet holes, oil storage tanks and outlet holes are provided inside the moving disk, and the top and bottom of the oil storage tank are respectively connected to the inlet hole and the outlet hole.

[0011] Furthermore, a fixed head is fixed on the top of the moving rod, and the pressure plate is in a circular ring shape.

[0012] Furthermore, the chassis assembly includes a fixed plate fixed to the lower part of the inner wall of the inner cylinder, the inner side of the fixed plate is movably connected with a connecting shaft that passes through the fixed plate, the outer surface of the connecting shaft is fixed with a fixed block, the bottom of the fixed block is fixed with a damping spring, the bottom of the damping spring is fixed with a spring retaining ring that fits with the fixed plate, and the bottom of the outer surface of the connecting shaft is fixed with a throttle valve.

[0013] Furthermore, the fixed disk is provided with four throttle holes distributed in an annular shape, the throttle valve extends into the throttle hole and is movably connected to the throttle hole, the fixed disk is provided with four reflux holes distributed in an annular shape and located at the periphery of the throttle hole, and a gap is left between the throttle valve and the throttle hole.

[0014] Furthermore, a sealed bearing is fixed to the inner bottom wall of the shell, and the inner side of the sealed bearing is movably connected to the rotating shaft.

[0015] Furthermore, the top of the inner tube is fixed to the inner top wall of the shell, and the bottom of the inner tube does not contact the bottom of the shell. A cavity for damping oil to flow is formed between the inner tube and the shell, and the cavity is filled with nitrogen.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0017] The damper with a damping adjustment device starts the adjustment mechanism to adjust the damping to a suitable position. When the external pressure increases, the pressure acts on the piston assembly to make the piston assembly move downward, and the damping oil inside the inner cylinder moves downward under the action of the piston assembly. Since the adjustment mechanism limits the flow of the damping oil through the chassis assembly, primary damping is achieved. After passing through the chassis assembly, the damping oil enters the space between the shell and the inner cylinder. The cavity is filled with nitrogen. After entering the space, the damping oil squeezes the nitrogen to achieve secondary damping. This adjustment method can ensure the damping stability while linearly adjusting the damping size, making it more applicable and having a better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional cross-sectional view of the utility model;

[0019] Figure 2 This is a three-dimensional appearance diagram of the utility model;

[0020] Figure 3 It is a three-dimensional exploded view of the internal structure of the damper of the utility model;

[0021] Figure 4 This is a cross-sectional view of the chassis assembly of the utility model;

[0022] Figure 5 It is a three-dimensional rear view of the adjustment mechanism of the utility model.

[0023] In the figure: 1 housing, 2 inner cylinder, 3 piston assembly, 301 moving rod, 302 moving disk, 303 baffle, 304 compression spring, 305 pressure plate, 4 chassis assembly, 401 connecting shaft, 402 fixing block, 403 damping spring, 404 spring retaining ring, 405 throttle valve, 406 fixing disk, 5 adjusting mechanism, 501 stepping motor, 502 fixing frame, 503 worm, 504 fixing plate, 505 worm wheel, 506 rotating shaft. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figures 1 to 2 A damper with a damping adjustment device in this embodiment includes a shell 1, an inner cylinder 2 is fixed to the top of the inner wall of the shell 1, a piston assembly 3 is provided on the inner wall of the inner cylinder 2, a chassis assembly 4 is provided at the bottom of the inner wall of the inner cylinder 2, and an adjustment mechanism 5 for adjusting the damping size is provided at the bottom of the shell 1.

[0026] A perforation is provided on the top of the housing 1, a sealing ring is fixed on the inner wall of the perforation, and a sealed bearing is fixed on the inner bottom wall of the housing 1. The provision of the sealing ring and the sealed bearing can prevent leakage of the damping oil.

[0027] Furthermore, the top of the inner tube 2 is fixed to the inner top wall of the shell 1, and the bottom of the inner tube 2 does not contact the bottom of the shell 1. A cavity for the damping oil to flow is formed between the inner tube 2 and the shell 1, and the cavity is filled with nitrogen. A sealed bearing is fixed to the inner bottom wall of the shell 1. Nitrogen is compressible. When the damping oil enters the cavity, it will be compressed into nitrogen. After the nitrogen is compressed, the volume gradually decreases. At the same time, the force required to compress the nitrogen gradually increases as the volume of the nitrogen decreases, thereby achieving a damping effect.

[0028] It should be noted that after the pressure acts on the piston assembly 3, the flow of hydraulic oil through the chassis assembly 4 is limited through the adjustment mechanism 5, thereby forming a damping adjustment, forming the first level of damping, and then the second level of damping is achieved through the cooperation between nitrogen and the cavity, ensuring that the damping is adjustable while ensuring that the damping is large enough.

[0029] See also Figures 3 to 5 In order to achieve controllable damping and ensure sufficient damping, the piston assembly 3 in this embodiment includes a moving rod 301 that passes through the top surface of the shell 1 and is movably connected to the shell 1, a moving disk 302 movably connected to the inner wall of the inner cylinder 2 is fixed to the bottom of the moving rod 301, a baffle 303 is fixed to the outer surface of the moving rod 301, a compression spring 304 is fixed to the bottom of the baffle 303, and a pressure plate 305 that fits the top surface of the moving disk 302 movably connected to the inner wall of the inner cylinder 2 is fixed to the bottom of the compression spring 304.

[0030] In addition, the inner ring of the sealing ring is movably connected to the moving rod 301, and a plurality of inlet holes, oil storage grooves and outlet holes are provided inside the moving disk 302. The top and bottom of the oil storage grooves are connected to the inlet holes and the outlet holes respectively. The sealing ring can prevent the damping oil from leaking from the top of the shell 1. The plurality of inlet holes, oil storage grooves and outlet holes are provided on the moving disk 302 to prevent excessive pressure under the piston assembly 3, while ensuring that a small amount of oil can flow through the piston assembly 3, ensuring that the interior of the shell 1 is filled with damping oil to ensure the damping performance.

[0031] It should be further explained that a fixed head is fixed on the top of the moving rod 301 , and the pressure plate 305 is annular. The annular pressure plate 305 is provided to block all holes above the moving disk 302 to ensure the pressure difference between the upper and lower parts of the moving disk 302 .

[0032] In this embodiment, when the piston assembly 3 moves downward, it pushes the hydraulic oil to move downward. At this time, the hydraulic oil pressure below the piston assembly 3 increases sharply, so that it flows to the top of the moving disk 302 through the hole in the moving disk 302. However, due to the presence of the pressure plate 305 and the compression spring 304, it can be ensured that there is a certain pressure difference between the upper and lower parts of the moving disk 302 to meet subsequent work.

[0033] The chassis assembly 4 includes a fixed plate 406 fixed to the lower part of the inner wall of the inner tube 2, the inner side of the fixed plate 406 is movably connected with a connecting shaft 401 that passes through the fixed plate 406, the outer surface of the connecting shaft 401 is fixed with a fixed block 402, the bottom of the fixed block 402 is fixed with a damping spring 403, the bottom of the damping spring 403 is fixed with a spring retaining ring 404 that fits with the fixed plate 406, and the bottom of the outer surface of the connecting shaft 401 is fixed with a throttle valve 405.

[0034] Furthermore, four throttle holes distributed in an annular shape are provided on the fixed disk 406, the throttle valve 405 extends into the throttle hole and is movably connected to the throttle hole, and four reflux holes distributed in an annular shape and located at the periphery of the throttle hole are provided on the fixed disk 406, and a gap is left between the throttle valve 405 and the throttle hole, and the gap can conveniently control the flow rate of the damping oil flowing out of the throttle valve 405.

[0035] It can be understood that when the pressure above the fixed plate 406 is greater than the pressure below, the damping oil will flow out through the throttle hole. When the pressure below the fixed plate 406 is greater than the pressure above, the damping oil will flow in through the reflux hole and push the damping spring 403 to cause the connecting shaft 401 and the throttle valve 405 thereon to move upward, thereby closing the throttle hole, so that the damping oil can only flow in through the reflux hole, ensuring that there is a certain pressure difference between the upper and lower parts of the fixed plate 406 to ensure the damping stability.

[0036] The adjustment mechanism 5 includes a fixing frame 502 and a fixing plate 504 fixed to the bottom of the shell 1, a stepping motor 501 is fixed to the bottom of the fixing frame 502, a worm 503 is fixed to the output shaft of the stepping motor 501, the other end of the worm 503 is rotatably connected to the fixing plate 504 through a stable bearing, the bottom of the shell 1 is threadedly connected to a rotating shaft 506 that penetrates into its inner cavity, a worm wheel 505 is meshed on the front side of the worm 503, and the bottom of the rotating shaft 506 penetrates the worm wheel 505 and is movably connected to the inner wall of the axis of the worm wheel 505.

[0037] It can be known that threads and driven teeth are fixed on the outer surface of the rotating shaft 506 in sequence from top to bottom, a through hole is opened at the bottom of the housing 1 for the rotating shaft 506 to pass through and is threadedly connected to the rotating shaft 506, and driven teeth matching the driving teeth are fixed on the inner surface of the worm gear 505. The inner side of the sealed bearing is movably connected to the rotating shaft 506. The arrangement of the driven teeth and the driving teeth can ensure that the power is smoothly transmitted to the rotating shaft 506, and the threaded connection can convert the rotation of the rotating shaft 506 into an upward movement, thereby achieving the purpose of controlling the damping size.

[0038] The power of the stepper motor 501 is transmitted from the worm 503 to the rotating shaft 506 via the worm wheel 505. Due to the threaded connection between the rotating shaft 506 and the housing 1, the rotating shaft 506 will rise simultaneously when rotating, thereby controlling the damping size.

[0039] It should be noted that when the pressure increases, the moving rod 301 will push the piston assembly 3 to move downward, thereby increasing the pressure of the damping oil under the moving disk 302, pushing the damping oil downward, passing through the throttle hole, and under the action of the stepper motor 501, the rotating shaft 506 is forced to move upward, thereby limiting the movement of the throttle valve 405 and controlling the flow of the damping oil through the throttle valve 405, thereby realizing the damping adjustment function.

[0040] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the utility model is controlled by the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0041] The working principle of the above embodiment is:

[0042] (1) When external pressure is applied, the pressure acts on the moving rod 301, thereby pushing the moving plate 302 and the baffle 303 to move downward. The baffle 303 pushes the pressure plate 305 downward through the compression spring 304, thereby squeezing the damping oil to move downward, and the damping oil is forced to pass through the throttle hole to start the stepper motor 501. The power of the stepper motor 501 is transmitted to the rotating shaft 506 through the worm 503 and the worm gear 505. Since the rotating shaft 506 and the housing 1 are threadedly connected, the rotating shaft 506 will rise at the same time when it rotates, thereby limiting the downward displacement distance of the connecting shaft 401, and further limiting the throttle valve 40 5 is opened to a certain size, so that the flow rate entering the throttle hole is greater than the flow rate flowing out of the throttle valve 405, thereby realizing the first-level damping, and the damping oil passing through the throttle valve 405 will enter the space between the shell 1 and the inner tube 2. This space is filled with nitrogen, so the damping oil will squeeze the nitrogen, and the second-level damping is realized by the compressibility of nitrogen. The flow rate is controlled by the throttle valve 405 to adjust the damping, and the throttle hole is used in conjunction with the throttle valve 405 to realize the first-level damping. The second-level damping is realized by compressing nitrogen through the damping oil, which can ensure stable and reliable damping while realizing damping adjustment to facilitate adaptation to more different usage conditions.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A damper with a damping adjustment device, comprising a housing (1), characterized in that: An inner cylinder (2) is fixed to the top of the inner wall of the shell (1), a piston assembly (3) is provided on the inner wall of the inner cylinder (2), a chassis assembly (4) is provided at the bottom of the inner wall of the inner cylinder (2), and an adjustment mechanism (5) for adjusting the damping size is provided at the bottom of the shell (1); The adjusting mechanism (5) comprises a fixing frame (502) and a fixing plate (504) fixed to the bottom of the housing (1); a stepping motor (501) is fixed to the bottom of the fixing frame (502); a worm (503) is fixed to the output shaft of the stepping motor (501); the other end of the worm (503) is rotatably connected to the fixing plate (504) via a stable bearing; a rotating shaft (506) is threadedly connected to the bottom of the housing (1) and penetrates into its inner cavity; a worm wheel (505) is meshed on the front of the worm (503); and the bottom of the rotating shaft (506) penetrates the worm wheel (505) and is movably connected to the inner wall of the axis of the worm wheel (505); The outer surface of the rotating shaft (506) is fixed with threads and driven teeth in sequence from top to bottom, the bottom of the housing (1) is provided with a through hole for the rotating shaft (506) to pass through and threadedly connected to the rotating shaft (506), and the inner surface of the worm wheel (505) is fixed with driven teeth that match the driving teeth.

2. A damper with a damping adjustment device according to claim 1, characterized in that: The piston assembly (3) comprises a moving rod (301) penetrating the top surface of the shell (1) and movably connected to the shell (1); a moving disk (302) movably connected to the inner wall of the inner cylinder (2) is fixed to the bottom of the moving rod (301); a baffle (303) is fixed to the outer surface of the moving rod (301); a compression spring (304) is fixed to the bottom of the baffle (303); and a pressure plate (305) is fixed to the bottom of the compression spring (304) and is in contact with the top surface of the moving disk (302) movably connected to the inner wall of the inner cylinder (2).

3. A damper with a damping adjustment device according to claim 2, characterized in that: The shell (1) is provided with a through hole at the top, a sealing ring is fixed on the inner wall of the through hole, the inner ring of the sealing ring is movably connected to the moving rod (301), and the movable plate (302) is provided with a plurality of inlet holes, oil storage grooves and outlet holes inside, and the top and bottom of the oil storage groove are respectively connected to the inlet hole and the outlet hole.

4. A damper with a damping adjustment device according to claim 2, characterized in that: A fixed head is fixed on the top of the moving rod (301), and the pressure plate (305) is in a circular ring shape.

5. A damper with a damping adjustment device according to claim 1, characterized in that: The chassis assembly (4) comprises a fixed plate (406) fixed to the lower part of the inner wall of the inner tube (2); the inner side of the fixed plate (406) is movably connected with a connecting shaft (401) penetrating the fixed plate (406); a fixed block (402) is fixed to the outer surface of the connecting shaft (401); a damping spring (403) is fixed to the bottom of the fixed block (402); a spring retaining ring (404) in contact with the fixed plate (406) is fixed to the bottom of the damping spring (403); and a throttle valve (405) is fixed to the bottom of the outer surface of the connecting shaft (401).

6. A damper with a damping adjustment device according to claim 5, characterized in that: The fixed disk (406) is provided with four throttle holes distributed in an annular shape, the throttle valve (405) extends into the throttle hole and is movably connected to the throttle hole, the fixed disk (406) is provided with four return holes distributed in an annular shape and located on the periphery of the throttle hole, and a gap is left between the throttle valve (405) and the throttle hole.

7. A damper with a damping adjustment device according to claim 1, characterized in that: A sealed bearing is fixed to the inner bottom wall of the housing (1), and the inner side of the sealed bearing is movably connected to the rotating shaft (506).

8. A damper with a damping adjustment device according to claim 1, characterized in that: The top of the inner cylinder (2) is fixed to the inner top wall of the shell (1), and the bottom of the inner cylinder (2) does not contact the bottom of the shell (1); a cavity for damping oil to flow is formed between the inner cylinder (2) and the shell (1), and the cavity is filled with nitrogen.

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