Hydraulic booster damping structure

Abstract

The utility model relates to a relay technology field especially relates to a hydraulic relay buffer structure, including cylinder, cylinder cover, piston and piston rod, and the buffer cavity is formed between piston and cylinder cover, and the buffer plunger of piston rod end portion is arranged in cylinder cover buffer guide cavity to form primary throttle buffer. Cylinder cover is equipped with the buffer flow channel of intercommunication oil hole and buffer cavity, and is installed the throttle valve of adjustable from outside at this flow channel, and the buffer speed is accurately controlled through the change of its opening degree. In view of the problem of corrosion of throttle valve, a protection device made of stainless steel is screwed on the outer thread end of the throttle valve, so that the throttle valve body can still use ordinary steel, thereby effectively resisting the corrosion risk in the high corrosion environment such as coastal area at extremely low cost without affecting the adjustment function, ensuring long-term operability and equipment life, and having excellent buffer performance, environmental adaptability and economy.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to a hydraulic relay buffer structure. Background Technology

[0002] Hydraulic actuators, as a common type of hydraulic actuator, are widely used in the reciprocating motion control of various mechanical equipment. To improve their operational smoothness and service life, a buffer structure is usually installed in the piston rod area to reduce the impact, vibration, and noise generated by the system at the end of the stroke or during directional changes.

[0003] Existing hydraulic buffer structures generally include components such as a cylinder, piston, piston rod, and end cylinder head. The cylinder also contains a buffer chamber to further absorb impact energy and reduce the instantaneous load transmitted to the piston rod. Furthermore, to adjust the buffering speed, a throttling rod is often installed at the cylinder bottom or front end cover and fixed with a nut to adjust the throttling effect.

[0004] However, in harsh environments such as high humidity and high salt spray (e.g., coastal areas), the exposed throttle rod and its threaded parts are highly susceptible to corrosion, leading to malfunction or even jamming of the regulating function. Replacing the entire throttle rod with corrosion-resistant materials such as stainless steel for corrosion resistance would significantly increase manufacturing costs, which is detrimental to economic efficiency and budget control.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this utility model is to provide a hydraulic relay buffer structure to address the deficiencies in the existing technology.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A hydraulic relay buffer structure includes a cylinder and a cylinder head disposed at one end thereon, a piston is disposed inside the cylinder, the piston is sleeved on the end of the piston rod, and an oil passage hole is provided on the cylinder head. A buffer cavity is formed between the piston and the cylinder head. A buffer plunger is provided at the end of the piston rod in the buffer cavity. A buffer guide cavity is provided on the cylinder head corresponding to the buffer plunger. The buffer guide cavity is connected to the oil passage and the buffer cavity respectively. A buffer flow channel is provided inside the cylinder head, and the oil passage is connected to the buffer chamber through the buffer flow channel. A throttle valve is provided at the buffer flow channel.

[0008] Furthermore, the buffer flow channel includes a first through hole and a second through hole that are interconnected. The two ends of the first through hole are respectively connected to the second through hole and the buffer cavity. One end of the second through hole is connected to the oil passage, and the other end penetrates through the outer wall of the cylinder head.

[0009] Furthermore, the throttle valve is installed on the outer wall of the cylinder head corresponding to the second through hole.

[0010] Furthermore, the throttle valve is screwed to the second through hole via an external thread, and a locking nut is fitted onto the external thread, the locking nut being pressed against the outer wall of the cylinder head.

[0011] Furthermore, a protective device is provided on the throttle valve, which is sleeved on the end of the throttle valve and screwed into the external thread.

[0012] Furthermore, a sealing ring is provided between the throttle valve and the inner wall of the second through hole.

[0013] Furthermore, a buffer bushing is fitted onto the piston rod, with one end of the buffer bushing abutting against the side of the piston facing away from the buffer cavity.

[0014] Furthermore, the buffer cavity is filled with buffer material.

[0015] The beneficial effects of this utility model are as follows: This application introduces an externally adjustable throttle valve design, enabling the equipment to flexibly fine-tune the buffer speed according to different workloads and speeds, greatly improving the equipment's adaptability and versatility. Addressing the issue of throttle valves easily corroding and jamming in harsh environments, a combination of a valve body made of ordinary materials and a stainless steel protective device is adopted. This perfectly solves the thread corrosion problem at the lowest cost, ensuring the long-term reliability and service life of the regulating function. It is particularly suitable for harsh working conditions such as coastal areas and high humidity environments, possessing extremely high economic efficiency and promotional value. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the hydraulic relay buffer structure in this utility model.

[0018] Reference numerals: 1. Cylinder; 11. Piston; 12. Piston rod; 13. Buffer chamber; 14. Buffer plunger; 15. Buffer bushing; 2. Cylinder head; 21. Oil passage; 22. Buffer guide chamber; 23. Buffer flow channel; 231. First through hole; 232. Second through hole; 3. Throttle valve; 31. External thread; 32. Lock nut; 33. Protective device; 34. Sealing ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figure 1 The hydraulic relay buffer structure shown includes a cylinder 1 and a cylinder head 2 disposed at one end thereon. A piston 11 is disposed inside the cylinder 1 and is sleeved on the end of a piston rod 12. An oil passage hole 21 is provided on the cylinder head 2. A buffer cavity 13 is formed between the piston 11 and the cylinder head 2. A buffer plunger 14 is disposed at the end of the piston rod 12 located in the buffer cavity 13. A buffer guide cavity 22 is provided on the cylinder head 2 corresponding to the buffer plunger 14. The buffer guide cavity 22 is connected to the oil passage hole 21 and the buffer cavity 13 respectively. A buffer flow channel 23 is provided inside the cylinder head 2. The oil passage hole 21 is connected to the buffer cavity 13 through the buffer flow channel 23. A throttle valve 3 is provided at the buffer flow channel 23.

[0023] The cylinder head 2 is fixedly installed at one end of the cylinder barrel 1, forming a sealed cavity together; the piston 11 is located inside the cylinder barrel 1 and is sleeved on the end of the piston rod 12, and the piston rod 12 drives the piston 11 to reciprocate within the cylinder barrel 1; an oil passage hole 21 is provided on the cylinder head 2 for the inflow and outflow of hydraulic oil, providing power for the movement of the piston 11.

[0024] To achieve a buffering effect, the buffer cavity 13 is filled with buffer material. This material can directly absorb and attenuate the impact energy at the end of the piston 11's movement. Secondly, a buffer bushing 15 is fitted onto the piston rod 12, with one end of the bushing 15 abutting against the side of the piston 11 facing away from the buffer cavity 13. The buffer bushing 15 contacts the inner wall of the cylinder 1 before the piston 11, effectively avoiding direct rigid collision and wear between the piston 11 and the cylinder 1, thus protecting both the cylinder 1 and the piston 11 and reducing operating noise.

[0025] Secondly, a buffer plunger 14 is fixedly installed at the end of the piston rod 12 and inside the buffer cavity 13. Correspondingly, a buffer guide cavity 22 is provided on the cylinder head 2 at the position of the buffer plunger 14. The buffer guide cavity 22 is connected to the oil passage 21 and the buffer cavity 13 respectively. When the piston 11 moves to near the end of the cylinder head 2, the buffer plunger 14 will gradually enter the buffer guide cavity 22. Through the precisely matched gap, a throttling effect is formed, which forces the oil in the buffer cavity 13 to be discharged only through a specific path, thereby generating back pressure and realizing preliminary hydraulic buffering.

[0026] In a preferred embodiment of this application, to allow for flexible adjustment of the buffer speed according to actual operating conditions, an additional buffer flow channel 23 is provided inside the cylinder head 2 to connect the oil passage 21 with the buffer cavity 13. The buffer flow channel 23 includes a first through hole 231 and a second through hole 232 that are interconnected. The two ends of the first through hole 231 are connected to the second through hole 232 and the buffer cavity 13, respectively. One end of the second through hole 232 is connected to the oil passage 21, and the other end penetrates through the outer wall of the cylinder head 2. A throttle valve 3 is installed on the outer wall of the cylinder head 2 corresponding to the second through hole 232.

[0027] By adjusting the opening of the throttle valve 3 from the outside, the flow cross-sectional area of ​​the buffer channel 23 can be directly changed, thereby precisely controlling the speed at which the oil flows out of the buffer chamber 13, and ultimately achieving fine-tuning of the buffer characteristics of the buffer channel 23, so that the same hydraulic device can adapt to different working requirements.

[0028] Furthermore, the throttle valve 3 is screwed into the second through hole 232 via an external thread 31, and a locking nut 32 is fitted onto the external thread 31, pressing the locking nut 32 against the outer wall of the cylinder head 2. A protective device 33 is provided on the throttle valve 3, which is fitted onto the end of the throttle valve 3 and screwed into the external thread 31. A sealing ring 34 is provided between the throttle valve 3 and the inner wall of the second through hole 232.

[0029] The throttle valve 3 is screwed into the internal thread of the second through hole 232 via its external thread, thereby achieving reliable installation and sealing. To ensure that the throttle valve 3 will not rotate unexpectedly due to vibration or other reasons after adjustment, a locking nut 32 is also fitted on its external thread 31. After the throttle valve 3 is adjusted to the correct position, tightening the locking nut 32 will press it against the outer wall of the cylinder head 2, which will effectively prevent the throttle valve 3 from loosening and ensure the stability of the set buffer effect.

[0030] The protective device 33 is fitted onto the adjusting end of the throttle valve 3 and connected to the external thread 31 of the throttle valve 3 via a thread. This protective device 33 can be made of corrosion-resistant materials such as stainless steel, while the valve body of the throttle valve 3 can still be made of ordinary 45# steel. This completely solves the corrosion problem of key adjusting parts, ensuring its long-term adjustability, and avoids the high cost of making the entire throttle valve 3 stainless steel, achieving excellent cost-effectiveness and making it particularly suitable for use in harsh working conditions.

[0031] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic relay buffer structure, characterized in that, It includes a cylinder (1) and a cylinder head (2) disposed at one end thereon. A piston (11) is disposed inside the cylinder (1). The piston (11) is sleeved on the end of the piston rod (12). An oil passage hole (21) is provided on the cylinder head (2). A buffer cavity (13) is formed between the piston (11) and the cylinder head (2). A buffer plunger (14) is provided at the end of the piston rod (12) in the buffer cavity (13). A buffer guide cavity (22) is provided on the cylinder head (2) corresponding to the buffer plunger (14). The buffer guide cavity (22) is connected to the oil passage (21) and the buffer cavity (13). A buffer flow channel (23) is provided inside the cylinder head (2), and the oil passage (21) is connected to the buffer chamber (13) through the buffer flow channel (23). A throttle valve (3) is provided at the buffer flow channel (23).

2. The hydraulic relay buffer structure according to claim 1, characterized in that, The buffer channel (23) includes a first through hole (231) and a second through hole (232) that are interconnected. The two ends of the first through hole (231) are connected to the second through hole (232) and the buffer cavity (13) respectively. One end of the second through hole (232) is connected to the oil passage (21), and the other end penetrates the outer wall of the cylinder head (2).

3. The hydraulic relay buffer structure according to claim 2, characterized in that, The throttle valve (3) is installed on the outer wall of the cylinder head (2) corresponding to the second through hole (232).

4. The hydraulic relay buffer structure according to claim 3, characterized in that, The throttle valve (3) is screwed to the second through hole (232) via an external thread (31), and a locking nut (32) is fitted on the external thread (31). The locking nut (32) is pressed onto the outer wall of the cylinder head (2).

5. The hydraulic relay buffer structure according to claim 4, characterized in that, A protective device (33) is provided on the throttle valve (3), and the protective device (33) is sleeved on the end of the throttle valve (3) and screwed to the external thread (31).

6. The hydraulic relay buffer structure according to claim 3, characterized in that, A sealing ring (34) is provided between the throttle valve (3) and the inner wall of the second through hole (232).

7. The hydraulic relay buffer structure according to claim 1, characterized in that, A buffer bushing (15) is fitted on the piston rod (12), and one end of the buffer bushing (15) abuts against the side of the piston (11) facing away from the buffer cavity (13).

8. The hydraulic relay buffer structure according to claim 1, characterized in that, The buffer cavity (13) is filled with buffer material.

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