Low-friction piston rod convenient for damping adjustment and used for seat

Abstract

The utility model discloses a seat low-friction piston rod convenient to adjust damping, which relates to the technical field of seat piston rods and comprises a hydraulic cylinder and a storage cylinder, the hydraulic cylinder is communicated with the storage cylinder, a piston is slidably arranged in the hydraulic cylinder, the piston is fixedly connected with the piston rod, and the piston rod is fixedly connected with the storage cylinder. The end, away from the piston, of the piston rod penetrates through the hydraulic cylinder and is in sliding connection with the hydraulic cylinder, a damping adjusting mechanism is arranged on the storage cylinder and comprises a rotary knob and a valve element, and the rotary knob controls the valve element to move to adjust the flowing area of hydraulic oil to achieve damping adjustment. Damping is adjusted through the damping adjusting mechanism, the valve element is moved by rotating the rotary knob through mechanical transmission, the opening and closing degree of the oil drainage hole is changed, the area of hydraulic oil flowing through the oil drainage hole is changed, damping adjustment is achieved, the comfort and adjustability of a seat are improved, the seat is suitable for various scenes, and the individual requirements of users are met.

Description

Technical Field

[0001] This utility model relates to the field of seat piston rod technology, and in particular to a low-friction piston rod for seats that is easy to adjust damping. Background Technology

[0002] The seat piston rod is the connecting component that supports the seat piston in performing its work. It is commonly used in the hydraulic cylinder actuators of a seat, using hydraulic pressure to achieve seat lifting, forward and backward movement, and angle adjustment. It is one of the key components of the seat adjustment mechanism and usually forms the seat's hydraulic cylinder system together with the cylinder body, piston, and other components. One end of the piston rod is connected to the piston, and the other end is connected to the seat adjustment mechanism through a connector, thereby realizing the seat adjustment function.

[0003] In a typical seat piston rod, the damping force is pre-set and cannot be easily changed through automatic settings. The inability to adjust the damping means that the seat's shock absorption performance is fixed and cannot be adjusted according to changes in the customer's weight, sitting posture, etc., which affects the comfort of riding and cannot adapt to different scenarios and needs. This has certain limitations and reduces the seat's applicability and user experience. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a low-friction piston rod for seats that is easy to adjust damping.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A low-friction piston rod for a seat with adjustable damping includes a hydraulic cylinder and a storage cylinder, which are interconnected. A piston is slidably disposed inside the hydraulic cylinder, and a piston rod is fixedly connected to the piston. The end of the piston rod away from the piston passes through the hydraulic cylinder and is slidably connected to it. A damping adjustment mechanism is provided on the storage cylinder. The damping adjustment mechanism includes a knob and a valve core. The knob controls the movement of the valve core to adjust the flow area of ​​the hydraulic oil, thereby adjusting the damping.

[0007] Preferably, the hydraulic cylinder has two through holes, which are located on both sides of the piston.

[0008] Preferably, the storage cylinder includes a hydraulic cylinder, a connecting pipe, an upper connector, and a lower connector. The upper connector and the lower connector are both fixedly connected to the hydraulic cylinder and are respectively connected to two through holes. The connecting pipe is fixedly connected between the upper connector and the lower connector to realize the conduction between the upper connector and the lower connector. The hydraulic cylinder is fixedly connected to the side of the lower connector and communicates with it. The lower connector is provided with an oil drain hole.

[0009] Preferably, the damping adjustment mechanism further includes a screw rotatably disposed in the oil cylinder, a nut threadedly connected to the screw, a valve core fixedly connected to the nut, and the position of the valve core corresponding to the oil drain hole.

[0010] Preferably, the knob is rotatably mounted on the oil cylinder via a sealed bearing, and a worm gear extending into the oil cylinder is fixedly connected to one side of the knob. A worm wheel matching the worm gear is fixedly sleeved on the screw.

[0011] Preferably, a limiting rod is fixedly connected inside the oil cylinder, and a limiting sleeve connected to a nut is slidably provided on the limiting rod.

[0012] Preferably, the reduction ratio between the worm and the worm wheel is 10:1, and the transmission ratio between the screw and the nut is 10:1.

[0013] Preferably, the surface of the piston rod is coated with a low-friction material, and a threaded connector is fixedly provided at the end of the piston rod away from the piston.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this application, the damping adjustment mechanism installed on the storage cylinder performs damping adjustment. By rotating the knob, the valve core is moved through mechanical transmission, changing the opening and closing degree of the oil drain hole, thereby changing the area through which hydraulic oil flows through the oil drain hole, thus realizing the damping adjustment, improving the comfort and adjustability of the seat, and making it suitable for various scenarios to meet the personalized needs of users.

[0016] 2. In this application, a worm gear and worm wheel transmission mechanism is adopted, and a reduction ratio of 10:1 is set, which effectively increases the torque at the output end. At the same time, a transmission ratio of 10:1 is also adopted between the screw and the nut, which further increases the thrust torque on the nut. This ensures that when adjusting the damping, even under load, a stable adjustment effect can be maintained, avoiding the reverse movement of the nut and improving the stability of the system. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a low-friction piston rod for a seat with easily adjustable damping is provided for this utility model.

[0018] Figure 2 A cross-sectional plan view of a low-friction piston rod for a seat with easily adjustable damping, as proposed in this utility model;

[0019] Figure 3 A partial cross-sectional view of the low-friction piston rod for a seat with easily adjustable damping, as proposed in this utility model;

[0020] Figure 4This utility model presents a schematic diagram of a damping adjustment mechanism for a low-friction piston rod used in a seat, which facilitates damping adjustment.

[0021] Legend: 100, Hydraulic cylinder; 101, Through hole; 200, Storage cylinder; 201, Oil cylinder; 202, Upper connector; 203, Lower connector; 204, Connecting pipe; 205, Oil drain hole; 300, Piston; 400, Piston rod; 500, Damping adjustment mechanism; 501, Knob; 502, Valve core; 503, Screw; 504, Nut; 505, Worm gear; 506, Worm wheel; 507, Limiting rod; 508, Limiting sleeve. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] like Figure 1-4 As shown, this utility model provides a low-friction piston rod for seats with easily adjustable damping, including a hydraulic cylinder 100 and a storage cylinder 200. The hydraulic cylinder 100 and the storage cylinder 200 are interconnected. A piston 300 is slidably disposed inside the hydraulic cylinder 100. A piston rod 400 is fixedly connected to the piston 300. The end of the piston rod 400 away from the piston 300 passes through the hydraulic cylinder 100 and is slidably connected to the hydraulic cylinder 100. A damping adjustment mechanism 500 is provided on the storage cylinder 200. The damping adjustment mechanism 500 includes a knob 501 and a valve core 502. The knob 501 controls the movement of the valve core 502 to adjust the flow area of ​​the hydraulic oil to achieve damping adjustment.

[0025] In this embodiment, the hydraulic cylinder 100 has two through holes 101, which are located on both sides of the piston 300.

[0026] In this embodiment, the storage cylinder 200 includes a hydraulic cylinder 201, a connecting pipe 204, an upper connector 202, and a lower connector 203. The upper connector 202 and the lower connector 203 are both fixedly connected to the hydraulic cylinder 100 and are respectively connected to two through holes 101. The connecting pipe 204 is fixedly connected between the upper connector 202 and the lower connector 203 to realize the conduction between the upper connector 202 and the lower connector 203. The hydraulic cylinder 201 is fixedly connected to the side of the lower connector 203 and communicates with it. The lower connector 203 is provided with an oil drain hole 205.

[0027] In this embodiment, the damping adjustment mechanism 500 further includes a screw 503 rotatably disposed in the oil cylinder 201. A nut 504 is threadedly connected to the screw 503. A valve core 502 is fixedly connected to the nut 504. The position of the valve core 502 corresponds to the drain hole 205. The screw 503 drives the nut 504 to move the valve core 502 through threaded transmission. After the valve core 502 moves, it cooperates with the drain hole 205 to adjust the area of ​​the hydraulic oil flowing through the drain hole 205, thereby realizing the damping adjustment.

[0028] In this embodiment, the knob 501 is rotatably mounted on the oil cylinder 201 via a sealed bearing. A worm 505 extending into the oil cylinder 201 is fixedly connected to one side of the knob 501. A worm wheel 506 matching the worm 505 is fixedly sleeved on the screw 503. The transmission between the worm 505 and the worm wheel 506 has a self-locking characteristic, that is, the worm 505 can drive the worm wheel 506 to rotate, but the worm wheel 506 cannot drive the worm 505 to rotate in the opposite direction. This can prevent the nut 504 from moving in the opposite direction under load and improve stability.

[0029] In this embodiment, a limiting rod 507 is fixedly connected inside the oil cylinder 201. A limiting sleeve 508 connected to the nut 504 is slidably provided on the limiting rod 507. When threaded transmission occurs between the screw 503 and the nut 504, the nut 504 will tend to rotate. The limiting rod 507 and the limiting sleeve 508 are used to limit the rotation, so that the nut 504 keeps moving in a straight line and does not rotate, thereby ensuring that the valve core 502 moves in a straight line.

[0030] In this embodiment, the reduction ratio between the worm 505 and the worm wheel 506 is 10:1, and the transmission ratio between the screw 503 and the nut 504 is 10:1. The 10:1 reduction ratio between the worm 505 and the worm wheel 506 means that the torque output by the worm wheel 506 is 10 times that input by the worm 505. Similarly, the 10:1 transmission ratio between the screw 503 and the nut 504 also increases the thrust torque on the nut 504, which can generate a large driving force at the output end. At the same time, after the worm 505 rotates one revolution, the nut 504 can only move forward a small distance through the transmission, which can achieve very precise position adjustment.

[0031] In this embodiment, the surface of the piston rod 400 is coated with a low-friction material coating, and a threaded connector is fixedly provided at the end of the piston rod 400 away from the piston 300. The low-friction material coating reduces the friction force when the piston rod 400 moves, ensuring smooth and fluid seat adjustment.

[0032] How to use and how to work this device:

[0033] When the damping needs to be adjusted during use, the worm gear 505 is rotated by the knob 501. The worm gear 505 rotates through its cooperation with the worm wheel 506, which in turn drives the screw 503 to rotate. When the screw 503 rotates, the nut 504 moves through the threaded transmission. Under the limit of the limit rod 507 and the limit sleeve 508, the nut 504 drives the valve core 502 to move linearly. The movement of the valve core 502 cooperates with the drain hole 205. When part of the valve core 502 extends into the drain hole 205, the extent of the valve core 502's extension is adjusted, changing the opening degree of the drain hole 205. This changes the area through which the hydraulic oil flows through the drain hole 205, thereby adjusting the damping and improving the comfort and adjustability of the seat. It is suitable for various scenarios and meets the personalized needs of users.

[0034] Meanwhile, since the valve core 502 needs to pass through the worm 505, worm wheel 506, screw 503 and nut 504 during the process of rotating the knob 501, a large driving force can be generated at the output end. After the worm 505 rotates one revolution, the nut 504 can only move forward a small distance through the transmission, which can achieve very precise position adjustment. At the same time, the transmission of the worm 505 and worm wheel 506 has a self-locking characteristic, which can prevent the nut 504 from moving in the opposite direction under load and improve stability.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A low-friction piston rod for a seat with easily adjustable damping, comprising a hydraulic cylinder (100) and a storage cylinder (200), characterized in that: The hydraulic cylinder (100) and the storage cylinder (200) are interconnected. A piston (300) is slidably disposed inside the hydraulic cylinder (100). A piston rod (400) is fixedly connected to the piston (300). The end of the piston rod (400) away from the piston (300) passes through the hydraulic cylinder (100) and is slidably connected to the hydraulic cylinder (100). A damping adjustment mechanism (500) is disposed on the storage cylinder (200). The damping adjustment mechanism (500) includes a knob (501) and a valve core (502). The knob (501) controls the valve core (502) to move and adjust the flow area of ​​the hydraulic oil to achieve damping adjustment. The hydraulic cylinder (100) has two through holes (101) located on both sides of the piston (300). The storage cylinder (200) includes an oil cylinder (201), a connecting pipe (204), an upper connector (202) and a lower connector (203). The lower connector (203) has an oil drain hole (205). The damping adjustment mechanism (500) further includes a screw (503) rotatably disposed in the oil cylinder (201), a nut (504) threadedly connected to the screw (503), a valve core (502) fixedly connected to the nut (504), the position of the valve core (502) corresponding to the drain hole (205), a knob (501) rotatably disposed on the oil cylinder (201) via a sealed bearing, a worm (505) extending into the oil cylinder (201) fixedly connected to one side of the knob (501), a worm wheel (506) matching the worm (505) fixedly sleeved on the screw (503), a limit rod (507) fixedly connected inside the oil cylinder (201), and a limit sleeve (508) connected to the nut (504) slidably disposed on the limit rod (507).

2. The low-friction piston rod for a seat with easily adjustable damping as described in claim 1, characterized in that: The upper connector (202) and the lower connector (203) are both fixedly connected to the hydraulic cylinder (100) and are respectively connected to two through holes (101). The connecting pipe (204) is fixedly connected between the upper connector (202) and the lower connector (203) to realize the conduction between the upper connector (202) and the lower connector (203). The oil cylinder (201) is fixedly connected to the side of the lower connector (203) and is connected to it.

3. The low-friction piston rod for a seat with easily adjustable damping as described in claim 1, characterized in that: The reduction ratio between the worm (505) and the worm wheel (506) is 10:1, and the transmission ratio between the screw (503) and the nut (504) is 10:

1.

4. The low-friction piston rod for a seat with easily adjustable damping according to claim 1, characterized in that: The piston rod (400) is coated with a low-friction material, and a threaded connector is fixedly provided at the end of the piston rod (400) away from the piston (300).

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