Damping-adjustable piston rod assembly and hardness-adjustable hydraulic damping rod

Abstract

The utility model relates to the technical field of automobile damping, in particular to a damping-adjustable piston rod assembly and a hardness-adjustable hydraulic damping rod. The piston rod assembly comprises a mandrel, a piston rod and a connector; the piston rod is provided with a liquid oil through hole and a liquid oil adjusting hole; a throttling groove is formed in the rear end of the mandrel; a knob is arranged at the front end of the mandrel; the connector is provided with a knob hole, and the inner wall of the knob hole abuts against the mandrel. According to the utility model, the structure is reasonable and compact, firstly, the mechanical adjustable device is additionally arranged, so that the damping rod with fixed damping is changed into the damping rod with variable damping, multiple damping modes are added, and multiple mode selections are provided for users; secondly, high-pressure gas is charged or discharged, so that the resistance is adjusted; in addition, the characteristic that the front section of the conical spring is soft and the rear section of the conical spring is hard can be utilized, vehicle parts are well protected, and when the vehicle turns, the vehicle rolling phenomenon can be reduced, the carsickness feeling of passengers is relieved, and stable running of the vehicle is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile shock absorption, more specifically, it relates to a piston rod assembly with adjustable damping and a hydraulic damping rod with adjustable softness and hardness. BACKGROUND

[0002] During the driving of an automobile, a transverse balance damping rod is usually installed on the chassis of the automobile to accelerate the damping of the vibration of the frame and the body and to improve the driving smoothness of the automobile. However, the existing transverse balance damping rod is a rigid steel rod, which cannot realize flexible damping and the size of the resistance cannot be adjusted, and the resistance cannot be adjusted according to the weight of different automobiles, which is inconvenient to use.

[0003] Therefore, the patent with the publication number CN219366668U discloses a damping rod with adjustable resistance by filling high-pressure gas into the cylinder body. However, the damping coefficient of this damping rod is fixed when the gas pressure in the cylinder body is not adjusted, which does not meet the user's needs. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a piston rod assembly with adjustable damping, which is improved in structure based on a conventional piston rod to solve the technical problem of fixed and unadjustable damping coefficient of the existing damping rod.

[0005] The above technical purpose of the utility model is achieved by the following technical scheme:

[0006] A piston rod assembly with adjustable damping includes a mandrel, a piston rod rotatably sleeved on the mandrel and used to be connected with a piston, and a connecting head fixedly arranged on the piston rod. A liquid oil through hole for accommodating the mandrel and liquid oil is formed in the piston rod, and a liquid oil adjusting hole in communication with the liquid oil through hole is formed in the outer wall of the piston rod. A throttle groove for adjusting the opening degree between the liquid oil through hole and the liquid oil adjusting hole to achieve throttling effect is formed in the rear end of the mandrel. A throttle sealing ring is accommodated in the liquid oil through hole to prevent liquid oil leakage. A knob for adjusting damping is arranged at the front end of the mandrel. A knob hole for accommodating the knob is formed in the connecting head, and the inner wall of the knob hole abuts against the front end of the mandrel to prevent the mandrel from falling off the piston rod.

[0007] Optionally, a plurality of damping identifiers for displaying damping levels are arranged on the connecting head.

[0008] Optionally, a plurality of gear grooves corresponding one-to-one to the damping identifiers are formed in the knob, and a wave bead screw for movably abutting against the gear grooves is arranged on the connecting head.

[0009] Another purpose of the utility model is to provide a hydraulic damping rod with adjustable softness and hardness, which includes the aforementioned piston rod assembly with adjustable damping.

[0010] Optionally, the cylinder is provided with a floating piston slidably arranged in the cylinder for sealingly separating the internal space of the cylinder into a gas cavity and a liquid oil cavity, and a piston slidably arranged in the cylinder for separating the liquid oil cavity into a first liquid cavity and a second liquid cavity, the piston is provided with two liquid oil communication holes for communicating the first liquid cavity and the second liquid cavity, and the piston is provided with a piston rod which is sealingly and slidably arranged at the front end of the cylinder.

[0011] Optionally, the rear end of the cylinder is provided with a valve core for inflating or deflating the gas cavity, and the piston rod is sealingly and slidably arranged at the front end of the cylinder.

[0012] Optionally, the second liquid cavity is provided with a cylindrical spring sleeved on the piston rod, one end of the cylindrical spring abuts against the piston, and the other end of the cylindrical spring abuts against the inner wall of the front end of the cylinder.

[0013] Optionally, the front end and the rear end of the piston are provided with reset valves.

[0014] Optionally, the gas cavity is provided with a conical spring, the thick end of the conical spring abuts against the floating piston, and the thin end of the conical spring abuts against the inner wall of the rear end of the cylinder.

[0015] Optionally, the floating piston and the piston are sealingly connected with the cylinder through sealing rings.

[0016] In summary, the utility model has the following beneficial effects: by arranging the liquid oil communication hole and the liquid oil adjusting hole which are in communication with each other on the piston rod, the liquid oil communication hole and the liquid oil adjusting hole form a liquid oil passage for the liquid oil to flow between the first liquid cavity and the second liquid cavity, the throttle groove arranged on the mandrel is used for adjusting the opening degree of the liquid oil passage, the flow of the liquid oil through the liquid oil passage in unit time is changed, and then the damping rod realizes multiple damping modes to adapt to more complex working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structure diagram of the piston rod assembly with adjustable damping in the utility model;

[0018] Figure 2 is the sectional view of the piston rod assembly with adjustable damping in the utility model;

[0019] Figure 3 is the explosion view of the piston rod assembly with adjustable damping in the utility model;

[0020] Figure 4 is the structure diagram of the hydraulic damping rod with adjustable softness and hardness in the utility model;

[0021] Figure 5 is the sectional view of the hydraulic damping rod with adjustable softness and hardness in the utility model;

[0022] Figure 6 is Figure 5Enlarged diagram of area A. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] This utility model provides a piston rod assembly with adjustable damping, such as Figures 1-3 As shown, the device includes a spindle 41, a piston rod 42 rotatably sleeved on the spindle 41 and used for connecting to the piston 3, and a connector 43 fixedly mounted on the piston rod 42. The piston rod 42 has an oil passage 421 for housing the spindle 41 and hydraulic oil, and an oil regulating hole 422 communicating with the oil passage 421 on its outer wall. The rear end of the spindle 41 has a throttling groove 411 for adjusting the opening degree between the oil passage 421 and the oil regulating hole 422 to achieve a throttling effect. A throttling sealing ring 412, sleeved on the spindle 41 to prevent oil leakage, is housed in the oil passage 421. The front end of the spindle 41 has a knob 44 for adjusting damping. The connector 43 has a knob hole 431 for housing the knob 44, and the inner wall of the knob hole 431 abuts against the front end of the spindle 41 to prevent the spindle 41 from falling off the piston rod 42.

[0026] Specifically, the liquid oil through hole 421 penetrates the piston rod 42, and the liquid oil adjusting hole 422 is perpendicular to the liquid oil through hole 421; the mandrel 41 is inserted into the liquid oil through hole 421 from the front end of the piston rod 42, so that the throttle groove 411 is located near the liquid oil adjusting hole 422; when the mandrel 41 is rotated, the throttle groove 411 can completely block, partially block or completely block the flow of liquid oil from the liquid oil through hole 421 to the liquid oil through hole 421, thereby achieving a valve effect; when the throttle groove 411 is at the maximum opening degree, the damping coefficient of the hydraulic damping rod is the smallest, and the damping feeling is soft; when the throttle groove 411 is at the minimum opening degree (liquid oil cannot flow from the liquid oil through hole 421 to the liquid oil through hole 421), the damping coefficient of the hydraulic damping rod is the largest, and the damping feeling is hard; when the throttle groove 411 is at the intermediate opening degree, the damping coefficient of the hydraulic damping rod is moderate, and the damping feeling is between soft and hard. The mandrel 41 realizes a sealing effect with the piston rod 42 through two throttle sealing rings 412, and the front end is fixed with the knob 44 by a threaded connection and is tightly pressed against the inner wall of the knob hole 431. The rear end of the connecting head 43 is fixed on the front end of the piston rod 42 by a threaded connection or welding, and the front end is used to connect with the parts of the automobile that need to be shock-absorbed and buffered. The above structure design opens the liquid oil through hole 421 and the liquid oil adjusting hole 422 on the piston rod 42 to communicate with each other, so that the two form a liquid oil passage for the liquid oil to interpenetrate between the first liquid cavity 11 and the second liquid cavity 12, and then the throttle groove 411 opened on the mandrel 41 is used to adjust the opening degree of the liquid oil passage, change the flow of the liquid oil passing through the liquid oil passage per unit time, and then make the damping rod realize multiple damping modes to adapt to more complex working conditions.

[0027] Further, the connecting head 43 is provided with a plurality of damping identifiers 432 for displaying damping levels.

[0028] As shown in the figure, Figures 1-3 the six damping identifiers 432 "1, 2, 3, 4, 5, 6" are set by engraving near the knob hole 431, and the outer wall of the knob 44 is also engraved with an indicator (not marked in the figure). When the indicator is opposite the number "1", it indicates that the damping coefficient level at this time is level one, and the damping rod is the softest. When the indicator is opposite the number "6", it indicates that the damping coefficient level at this time is level six, and the damping rod is the hardest. In actual use, the knob 44 is rotated to the appropriate position to quickly adjust the damping coefficient, so as to realize multiple damping modes to adapt to more complex working conditions.

[0029] Further, a plurality of gear grooves 441 corresponding to the damping identifiers 432 are opened on the knob 44, and the connecting head 43 is provided with a wave bead screw 45 for movably abutting against the gear grooves 441.

[0030] As shown in the figure, Figure 3As shown, the wave bead screw 45 is screwed on the connector 43 through threaded connection, the gear slot 441 cooperates with the wave bead screw 45, and when the knob 44 rotates, a "click" sound is formed to improve the product quality and gear judgment.

[0031] The utility model discloses still provide a kind of soft and hard adjustable hydraulic damping rod, it includes aforementioned piston rod assembly 4, when using, piston rod assembly 4 is used as conventional piston rod can. Figures 4-6 As shown, it includes cylinder body 1, floating piston 2 for sealing and separating the internal space of cylinder body 1 into gas cavity 11 and liquid oil cavity 12 is slidably arranged in cylinder body 1, piston 3 for separating liquid oil cavity 12 into first liquid cavity 121 and second liquid cavity 122 is slidably arranged in cylinder body 1, two liquid oil communication holes 31 for communicating first liquid cavity 121 and second liquid cavity 122 are formed on piston 3, piston rod 42 is arranged on piston 3, and the end of cylinder body 1 is sealingly and slidably arranged with piston rod 42.

[0032] Specifically, the rear end of cylinder body 1 is sealed by a sealing end cover in the art, and the front end is sealed by an oil storage cover in the art; the front end of piston rod 42 penetrates through the oil storage cover and is sealingly and slidably connected with the oil storage cover, and the rear end of piston rod 42 penetrates through piston 3 and is fixedly connected with piston 3 through a nut; high-pressure compressed gas is filled in gas cavity 11, and liquid oil (hydraulic oil) is filled in liquid oil cavity 12; when piston 3 slides forward and backward, the liquid oil in first liquid cavity 121 and the liquid oil in second liquid cavity 122 flow into each other through liquid oil communication holes 31, thereby changing the relative volumes of first liquid cavity 121 and second liquid cavity 122. Guide ring 32 plays a supporting and guiding role, preventing piston 3 from directly contacting and rubbing with cylinder body 1 during movement, and protecting cylinder body 1 and piston 3 from being damaged; the inner ring of guide ring 32 is arranged on the outer wall of piston 3, and the outer ring is attached to the inner wall of cylinder body 1. In order to reduce the wear of guide ring 32 and improve the service life of the damping rod, liquid oil grooves (not shown in the figure) can also be formed on the outer ring of guide ring 32, which are inclined or vertically arranged on the outer ring of guide ring 32, and the groove depth is less than one-third of the radial thickness of guide ring 32; the number of liquid oil grooves can be set as needed, which is generally related to the diameter, the larger the diameter, the more the number, and the preferred is equally spaced. During the reciprocating sliding of piston 3, liquid oil can enter between the outer wall of guide ring 32 and the inner wall of cylinder body 1 through the liquid oil grooves, reducing the friction and heat generation between the two.

[0033] Further, the rear end of cylinder body 1 is provided with a valve core 5 for inflating or deflating gas cavity 11, and piston rod 42 is sealingly and slidably arranged at the front end of cylinder body 1.

[0034] As Figures 4-5As shown, the valve core 5 is screwed in the sealing end cover at the rear end of the cylinder body 1 by means of thread connection. The specific cooperation structure between the valve core 5 and the sealing end cover refers to the valve nozzle structure on the truck inner tube. The gas cavity 11 is charged and discharged by the valve core 5 to adjust the internal pressure and realize the adjustment of the resistance, which has the advantages of convenient and flexible use.

[0035] Further, the second liquid cavity 122 is provided with a cylindrical spring 6 sleeved on the piston rod 42; one end of the cylindrical spring 6 abuts against the piston 3, and the other end thereof abuts against the inner wall of the front end of the cylinder body 1.

[0036] As shown, Figures 4-6 the front end of the cylindrical spring 6 abuts against the oil storage cover at the front end of the cylinder body 1, and the rear end thereof directly or indirectly abuts against the piston 3. When the piston rod 42 extends forward, the piston 3 compresses the cylindrical spring 6; when the piston rod 42 retracts into the cylinder body 1, the cylindrical spring 6 quickly releases the elastic potential energy to push the piston 3 to slide toward the floating piston 2, thereby improving the responsiveness of the damping rod.

[0037] Further, the front end and the rear end of the piston 3 are both provided with a reset valve 7.

[0038] As shown, Figures 4-6 the rear end of the piston rod 42 is provided with an external thread matched with the nut, which passes through the reset valve 7 at the front end of the piston 3, the piston 3, and the reset valve 7 at the rear end of the piston 3 in sequence and is connected with the nut. The reset valve 7 can control the flow direction of the liquid oil. When the piston 3 slides toward the rear end of the cylinder body 1, the reset valve 7 at the rear end of the piston 3 deforms to block the liquid oil communication hole 31 at the top of the piston 3 but does not block the liquid oil communication hole 31 at the bottom of the piston 3, so that the liquid oil in the first liquid cavity 121 enters the second liquid cavity 122 from the liquid oil communication hole 31 at the bottom of the piston 3; when the piston 3 slides toward the front end of the cylinder body 1, the reset valve 7 at the front end of the piston 3 deforms to block the liquid oil communication hole 31 at the bottom of the piston 3 but does not block the liquid oil communication hole 31 at the top of the piston 3, so that the liquid oil in the second liquid cavity 122 enters the first liquid cavity 121 from the liquid oil communication hole 31 at the top of the piston 3. The design of the double reset valves 7 makes the damping feeling of the damping rod smooth and coherent during the switching process of the compression and extension states of the piston rod 42, and the virtual displacement is small.

[0039] Further, the gas cavity 11 is provided with a conical spring 8; the thick end of the conical spring 8 abuts against the floating piston 2, and the thin end thereof abuts against the rear end inner wall of the cylinder body 1.

[0040] As shown, Figure 4As shown, the conical spring 8 is located in the gas cavity 11, which is used to increase the resistance of the floating piston 2 sliding to the rear end of the cylinder 1. The conical spring 8 has a variable K value, which is constant in the compression front section and gradually increases in the compression rear section, so that the conical spring 8 has the characteristics of soft front and hard rear,

[0041] Further, the piston rod 42 also realizes the effect of soft front and hard rear in the compression process; the soft front is beneficial to obtain a larger compression stroke, thereby improving the vehicle comfort; the hard rear is beneficial to hinder the rigid "bottoming out" phenomenon of the piston rod 42, which can better protect the structure of the damping rod, reduce the vehicle roll phenomenon, and protect the vehicle parts.

[0042] Further, the floating piston 2 and the piston 3 are both sealed and connected with the cylinder 1 through the sealing ring 9.

[0043] As Figures 4-6 shown, the outer wall of the floating piston 2 and the piston 3 is provided with an annular groove, and the sealing ring 9 is sleeved on the annular groove. The sealing ring 9 is an O-shaped sealing ring, which can prevent the gas-liquid mutual mixing and the liquid-liquid mutual mixing, thereby providing protection for the stable performance of the damping rod.

[0044] The preferred embodiments of the utility model are described above, and the protection scope of the utility model is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the utility model belongs to the protection scope of the utility model. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the utility model are also considered as the protection scope of the utility model.

Claims

1. A damped adjustable piston rod assembly, characterized in that, The device includes a mandrel, a piston rod rotatably mounted on the mandrel and used for connecting to a piston, and a connector fixedly mounted on the piston rod. The piston rod has an oil passage for housing the mandrel and hydraulic oil, and an oil regulating hole communicating with the oil passage on its outer wall. The rear end of the mandrel has a throttling groove for adjusting the opening and closing degree between the oil passage and the oil regulating hole to achieve a throttling effect. The front end of the mandrel has a knob for adjusting damping. The connector has a knob hole for housing the knob, with the inner wall of the knob hole pressed against the front end of the mandrel to prevent the mandrel from falling off the piston rod.

2. The damped adjustable piston rod assembly of claim 1, wherein, The connector has several damping identifiers to indicate the damping level.

3. The damped adjustable piston rod assembly of claim 2, wherein, The knob has several slots that correspond one-to-one with the damping indicator, and the connector has ball screws for moving and pressing against the slots.

4. A hydraulic adjustable stiffness damper rod characterized by, Includes the damping adjustable piston rod assembly as described in any one of claims 1-3.

5. The adjustable stiffness hydraulic damper rod of claim 4, wherein, The system includes a cylinder body, a floating piston that is slidably disposed within the cylinder body to seal and divide the internal space of the cylinder body into a gas chamber and a liquid oil chamber, a piston that is slidably disposed within the cylinder body to divide the liquid oil chamber into a first liquid chamber and a second liquid chamber, two liquid oil communication holes that connect the first liquid chamber and the second liquid chamber are provided on the piston, and a piston rod is provided on the piston, which is sealed and slidably disposed with respect to the end of the cylinder body.

6. The adjustable stiffness hydraulic damper rod of claim 5, wherein, The rear end of the cylinder is equipped with a valve core for filling or venting the gas chamber, and the piston rod is sealed and slidably connected to the front end of the cylinder.

7. The adjustable stiffness hydraulic damper rod of claim 5, wherein, The second liquid chamber contains a cylindrical spring fitted onto the piston rod; one end of the cylindrical spring abuts against the piston, and the other end abuts against the inner wall of the front end of the cylinder.

8. The adjustable stiffness hydraulic damper rod of claim 5, wherein, Both the front and rear ends of the piston are equipped with recovery valves.

9. The adjustable stiffness hydraulic damper rod of claim 5, wherein, A conical spring is placed inside the gas chamber; the thicker end of the conical spring presses against the floating piston, and the thinner end presses against the inner wall of the rear end of the cylinder.

10. The adjustable stiffness hydraulic damper rod of claim 5, wherein, Both the floating piston and the piston are sealed to the cylinder body via sealing rings.

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