Two-section force damper

Abstract

The utility model discloses a two-section force damper which comprises a stretching pipe, and a mechanical spring is fixedly installed at the lower end in the stretching pipe. Through the arrangement of the piston rod, the floating piston and the reset spring, when the damper is pressed downwards, the first O-shaped sealing ring and the second O-shaped sealing ring can seal the peripheries of the fixed piston and the floating piston, so that silicone oil generates resistance through a piston hole, and the fixed piston generates resistance when the first section of the piston rod is pressed downwards; the second section of force is generated by compressing an injection molding fixing part on the piston rod to the floating piston after the fixed piston is pressed down to a certain stroke, so that a two-section force damper is achieved, a bottom mechanical spring rapidly resets the damper under the condition that the damper is not subjected to external force, and a middle reset spring enables the floating piston to reset; therefore, the damper can be reused, secondary damping can be achieved conveniently, a buffer with the front section small in force and the rear section large in force is achieved, automatic reset is achieved, and the silencing effect is effectively achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dampers, in particular to a two-stage force damper. Background Art

[0002] A damper is a device that provides resistance to movement and dissipates kinetic energy. Various dampers (or shock absorbers) have long been used in aerospace, aviation, military, firearms, automotive and other industries to reduce vibration and dissipate energy. Since the 1970s, people have gradually begun to transfer these technologies to structural engineering such as buildings, bridges, and railways, and their development has been very rapid.

[0003] Currently, the market generally uses a single-stage force damper, which does not have the function of secondary damping. In addition, the damper has a long stroke and consistent force, which causes the box cover to make a sound when it is finally closed, thereby reducing the practicality of the damper and reducing the market share. It cannot meet the needs of users. For this reason, we propose a two-stage force damper. Summary of the Invention

[0004] The purpose of the utility model is to provide a two-stage force damper, which has the advantage of convenient secondary damping, and solves the problem that the current market generally has a single-stage force damper, which does not have the function of secondary damping, and the damper has a long stroke and consistent force, resulting in a noise when the box cover is finally closed, thereby reducing the practicality of the damper, reducing the market share, and failing to meet the needs of users.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a two-stage force damper, comprising a stretching tube, a mechanical spring fixedly installed at the lower end of the interior of the stretching tube, a fixed piston provided on the inner surface of the stretching tube, a first O-ring fixedly installed on the upper surface of the fixed piston, a piston hole provided on the upper surface of the fixed piston, a piston rod fixedly installed at the center of the fixed piston, a floating piston fixedly installed on the outer surface of the piston rod, a second O-ring fixedly installed on the outer surface of the floating piston, a card groove provided on the outer surface of the piston rod, and an injection-molded fixing fixedly installed on the inner surface of the card groove, and a reset spring provided on the outer surface of the piston rod.

[0006] As a preferred solution, the stretch tube is loaded with dielectric oil, and the dielectric oil is silicone oil.

[0007] As a preferred solution, a guide sleeve is fixed to the front end of the stretch tube.

[0008] As a preferred solution, the inner surface of the guide sleeve is provided with a guide sleeve Y-ring, and the inner surface of the guide sleeve is provided with a guide sleeve O-ring.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0010] 1. The utility model is provided with a piston rod, a floating piston and a return spring. When the damper is pressed down, the first O-ring and the second O-ring can seal the four sides of the fixed piston and the floating piston, so that the silicone oil generates resistance through the piston hole. The fixed piston generates resistance when the piston rod is pressed down in the first force. The second force is that after the fixed piston is pressed down to a certain stroke, the injection molded fixing part on the piston rod is compressed to the floating piston to generate the second force, thereby achieving a two-stage force damper. The bottom mechanical spring quickly resets the damper when the damper is not subjected to external force. The middle return spring resets the floating piston, so that the damper can be used again, which is convenient for realizing secondary damping. The buffer has a small force in the front section and a large force in the back section, and it automatically resets, effectively achieving a silencing effect.

[0011] 2. The utility model can seal the entire damper to prevent leakage by arranging the guide sleeve Y-ring, guide sleeve O-ring and guide sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic structural diagram of the utility model.

[0013] In the figure: 1. Stretch tube; 2. Mechanical spring; 3. Fixed piston; 31. Piston hole; 4. First O-ring; 5. Floating piston; 6. Second O-ring; 7. Return spring; 8. Injection molded fixing; 9. Guide sleeve Y-ring; 10. Guide sleeve O-ring; 11. Guide sleeve; 12. Piston rod. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example

[0016] See also Figure 1As shown, the utility model provides a two-stage force damper, including a stretching tube 1, a mechanical spring 2 is fixedly installed at the lower end of the interior of the stretching tube 1, a fixed piston 3 is provided on the inner surface of the stretching tube 1, a first O-ring 4 is fixedly installed on the upper surface of the fixed piston 3, a piston hole 31 is provided on the upper surface of the fixed piston 3, a piston rod 12 is fixedly installed at the center of the fixed piston 3, a floating piston 5 is fixedly installed on the outer surface of the piston rod 12, a second O-ring 6 is fixedly installed on the outer surface of the floating piston 5, a card groove is provided on the outer surface of the piston rod 12, and an injection molded fixing part 8 is fixedly installed on the inner surface of the card groove, and a return spring 7 is provided on the outer surface of the piston rod 12.

[0017] The present technical solution sets up the application of piston rod 12, floating piston 5 and return spring 7. The first O-ring 4 and the second O-ring 6 can seal the four sides of fixed piston 3 and floating piston 5, so that the resistance generated by silicone oil passing through piston hole 31 is generated. The fixed piston 3 generates resistance when the piston rod 12 is pressed down in the first section of force. The second section of force is that after the fixed piston 3 is pressed down to a certain stroke, the injection molded fixing part 8 on the piston rod 12 is compressed to the floating piston 5 to generate the second section of force, thereby achieving a two-section force damper. The bottom mechanical spring 2 quickly resets the damper when the damper is not subjected to external force. The middle return spring 7 resets the floating piston 5, so that the damper can be used again, which is convenient for realizing secondary damping. The buffer has small force in the front section and large force in the back section, and it automatically resets, effectively achieving a silencing effect. Example

[0018] On the basis of embodiment 1, the present invention is as follows Figure 1 As shown, it is disclosed that the stretch tube 1 is loaded with medium oil, and the medium oil is silicone oil.

[0019] By adopting the above technical solution, the medium oil is set to silicone oil, which can effectively adapt to the damper, facilitate the use of the damper, and effectively improve the use effect of the damper. Example

[0020] The utility model Figure 1 As shown, a guide sleeve 11 is fixed to the front end of the stretch tube 1 , a guide sleeve Y-ring 9 is provided on the inner surface of the guide sleeve 11 , and a guide sleeve O-ring 10 is provided on the inner surface of the guide sleeve 11 .

[0021] By adopting the above technical solution, the entire damper can be sealed by providing the guide sleeve 11, the guide sleeve Y-ring 9 and the guide sleeve O-ring 10 to prevent leakage, thereby effectively improving the practicality of the damper.

[0022] The working principle of the present invention is as follows: a mechanical spring 2 is installed at the lower end of the inner part of the stretching tube 1, and the mechanical spring 2 makes the damper automatically reset, the stretching tube 1 is loaded with medium oil, the fixed piston 3 is arranged inside the stretching tube 1, and is fixed at one end of the piston rod 12, the piston rod 12 is connected to the reset spring 7, the floating piston 5, and the injection molded fixing part 8 through the guide sleeve 11 to become the moving body of the damper, the fixed piston 3 is provided with a first O-ring 4, the first O-ring 4 seals the fixed piston 3 when compressed, and a piston hole 31 is provided on the fixed piston 3. When the fixed piston 3 is compressed, oil is allowed to pass through the piston hole 31 to generate force, and the force can be controlled by adjusting the size of the piston hole 31. The middle part of the fixed piston 3 is provided with a piston rod 12, and the piston rod 12 plays a positioning role for all accessories, and the front end of the piston rod 12 passes through the guide sleeve 11, and the guide sleeve 1 1 is installed at the front end of the stretch tube 1 and the guide sleeve 11 is equipped with a guide sleeve Y-ring 9 and a guide sleeve O-ring 10, thereby sealing the entire damper to prevent leakage. The guide sleeve 11 positions the piston rod 12. A floating piston 5 is installed in the middle of the piston rod 12. A second O-ring 6 is installed on the outer surface of the floating piston 5. A card slot is provided on the piston rod 12, and an injection molded fixing part 8 is installed in the card slot. When the floating piston 5 is compressed, the activity does not generate force, and resistance is generated when it reaches the position of the injection molded fixing part 8. Furthermore, the medium oil is silicone oil, and the hydraulic oil generates force through the piston hole 31. Under the condition of the same viscosity of the medium silicone oil, the buffer uses a large-hole piston at the front end through a double piston method, resulting in a small force, and the fixed piston 3 and the floating piston 5 are used at the rear end at the same time, resulting in a large force. A spring is placed at the bottom to automatically reset the buffer, making it more convenient to use.

[0023] It is important to note that the configuration and arrangement of the present application, as shown in various exemplary embodiments, are illustrative only. Although only a few embodiments are described in detail in this disclosure, those reading this disclosure will readily appreciate that numerous modifications are possible (e.g., variations in the size, dimensions, structure, shape, and proportions of various components, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, components shown as integrally formed may be constructed from multiple parts or components, the positions of components may be inverted or otherwise altered, and the nature, number, or position of discrete components may be modified or changed. Therefore, all such modifications are intended to be encompassed within the scope of this invention. The order or sequence of any process or method steps may be altered or reordered according to alternative embodiments. In the claims, any "means-plus-function" clause is intended to cover structures described herein that perform the function described, and not only structural equivalence but also equivalent structures. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0024] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A two-stage force damper comprising a stretch tube (1), characterized in that: A mechanical spring (2) is fixedly mounted on the lower end of the interior of the stretch tube (1), a fixed piston (3) is provided on the inner surface of the stretch tube (1), a first O-type sealing ring (4) is fixedly mounted on the upper surface of the fixed piston (3), a piston hole (31) is provided on the upper surface of the fixed piston (3), a piston rod (12) is fixedly mounted at the center of the fixed piston (3), a floating piston (5) is fixedly mounted on the outer surface of the piston rod (12), a second O-type sealing ring (6) is fixedly mounted on the outer surface of the floating piston (5), a card slot is provided on the outer surface of the piston rod (12), and an injection molded fixing part (8) is fixedly mounted on the inner surface of the card slot, and a return spring (7) is provided on the outer surface of the piston rod (12).

2. The two-stage force damper according to claim 1, characterized in that: The stretching tube (1) is loaded with medium oil, and the medium oil is silicone oil.

3. The two-stage force damper according to claim 1, characterized in that: A guide sleeve (11) is fixed to the front end of the stretch tube (1).

4. The two-stage force damper according to claim 3, characterized in that: The inner surface of the guide sleeve (11) is provided with a guide sleeve Y-ring (9), and the inner surface of the guide sleeve (11) is provided with a guide sleeve O-ring (10).

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