Disc type buffer device

Abstract

The utility model discloses a disc type buffering device, which comprises a cylinder head, a piston rod and a buffering device, the piston rod is connected inside the cylinder head in a sliding mode, the buffering device is arranged outside the cylinder head, the buffering device comprises a disc, a check ring, a buffering ring and a buffering sleeve, and the disc is connected to the outer surface of a spigot of the cylinder head in a floating mode. The check ring is in threaded connection with a spigot of the cylinder head, the buffer ring is fixedly connected to the outer portion of the piston rod, and the buffer sleeve is connected to the inner portion of the cylinder head in a floating mode. Under the action of matching the disc, the baffle ring and the cylinder head, the impact force in the movement process of the hydraulic cylinder can be effectively absorbed, the speed is slowed down, and accurate buffer control is provided; under the buffering action of the buffering ring and the cylinder head, the buffering force and stroke can be conveniently adjusted, different working conditions are adapted, the design structure is simple, good reliability and practicability are achieved, the leakage risk does not need to be sealed, and the service life of the hydraulic cylinder is greatly prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and in particular relates to a disc-type buffer device. Background Art

[0002] Hydraulic cylinders are the most fundamental components of hydraulic actuators, particularly in the metallurgical industry. Their use is crucial, and the rationality of their design is crucial to the success of mechanical automation in metallurgical equipment. A hydraulic cylinder's buffer is a deceleration device that slows the piston's movement until it stops when it reaches the cylinder head or bottom, minimizing the risk of direct impact with the cylinder head or bottom, which could damage the cylinder. This device is widely used in heavy-duty, high-speed hydraulic cylinders.

[0003] In these applications, the rapid movement of the hydraulic cylinder can cause severe impact, resulting in structural damage or reduced precision. Existing buffering solutions may not be precise or reliable enough, especially in applications that require fast response and repeatability. When a hydraulic cylinder meets both buffering and starting requirements, the buffer device is usually used in conjunction with a one-way valve, but the installation of the one-way valve requires sufficient space in the cylinder head. In addition, among the hydraulic cylinder products in the existing technology that have buffering and starting requirements, many products have limited space for components, and it is not possible to directly design a one-way valve according to the conventional method. Therefore, it is difficult to meet the rapid starting function of the hydraulic cylinder and cannot meet actual needs. Summary of the Invention

[0004] The present invention aims to solve the problem that many hydraulic cylinder products with buffering and starting requirements in the prior art have limited space for parts and cannot directly design a one-way valve according to the conventional method, thus making it difficult to meet the problem of the rapid starting function of the hydraulic cylinder. The following technical solutions are proposed:

[0005] A disc-type buffer device comprises a cylinder head, a piston rod slidably connected to the inside of the cylinder head, and a buffer device arranged outside the cylinder head;

[0006] The buffer device includes a disc, a retaining ring, a buffer ring, and a buffer sleeve. The disc is floatingly connected to the outer surface of the stopper of the cylinder head. The retaining ring is threadedly connected to the stopper of the cylinder head. The buffer ring is fixedly connected to the outside of the piston rod. The buffer sleeve is floatingly connected to the inside of the cylinder head.

[0007] The disc, retaining ring and cylinder head work together to effectively absorb the impact force during the movement of the hydraulic cylinder, slow down the speed and provide precise buffer control.

[0008] As a preferred embodiment of the above technical solution, two throttling holes are opened at the stop of the cylinder head, the side of the disc close to the cylinder head is in contact with the throttling holes, and the inner diameter of the disc is adapted to the outer diameter of the stop of the cylinder head.

[0009] When the oil pressure inside the cylinder head changes, the disc can cover the throttle hole on the cylinder head stop, so that the hydraulic oil can only flow through the buffer gap inside the cylinder head, thereby playing a buffering role.

[0010] As a preferred embodiment of the above technical solution, a buffer cavity is provided inside the cylinder head, the buffer ring is fixedly connected to the outer surface of the piston rod, and the buffer ring is slidably connected to the inside of the buffer sleeve.

[0011] Under the buffering effect of the buffer ring, the buffering force and stroke can be easily adjusted to adapt to different working conditions.

[0012] As a preferred embodiment of the above technical solution, the outer diameter of the retaining ring is adapted to the outer diameter of the cylinder head, and the inner diameter of the retaining ring is smaller than the outer diameter of the buffer ring.

[0013] Under the limiting effect of the stop ring, the disc and the buffer ring can be limited when moving.

[0014] As a preferred embodiment of the above technical solution, the piston rod is slidably connected to the interior of the cylinder head, and the outer diameter of the piston rod is adapted to the inner diameter of the cylinder head.

[0015] When the piston rod moves to a predetermined position, the buffer force and stroke can be easily adjusted to adapt to different working conditions.

[0016] As a preferred embodiment of the above technical solution, two installation grooves are provided on the outer surface of the buffer sleeve, and O-rings are sleeved inside the two installation grooves.

[0017] Under the buffering effect of the buffer ring and the O-ring, there is no risk of seal leakage, which greatly extends the service life of the hydraulic cylinder.

[0018] The beneficial effects of the utility model are:

[0019] (1) The disc, the retaining ring and the cylinder head work together to effectively absorb the impact force during the movement of the hydraulic cylinder, slow down the speed and provide precise buffer control;

[0020] (2) Under the buffering action of the buffer sleeve and the cylinder head, the buffering force and stroke can be easily adjusted to adapt to different working conditions. The design structure is simple, with good reliability and practicality. There is no risk of sealing leakage, which greatly extends the service life of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a cross-sectional view of the structure of the entire device;

[0022] Figure 2 Shown is a cross-sectional view of the cylinder head, disc and gear ring;

[0023] Figure 3 Shown is a front view of the structure of the cylinder head, disc and gear ring;

[0024] Figure 4 Shown is a cross-sectional view of the structure of the buffer ring;

[0025] Figure 5 Shown is a front view of the structure of the piston rod and the buffer ring.

[0026] In the figure: 1. Cylinder head; 2. Disc; 3. Shift ring; 4. Piston rod; 5. Buffer ring; 6. Buffer sleeve. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Example

[0028] Figures 1 to 5 The figure shows a schematic diagram of a specific embodiment of the present invention. A disc-type buffer device includes a cylinder head 1, a piston rod 4 slidably connected to the inside of the cylinder head 1, and a buffer device arranged outside the cylinder head 1. The buffer device includes a disc 2, a retaining ring 3, a buffer ring 5, and a buffer sleeve 6. The disc 2 is floatingly connected to the outer surface of the stopper of the cylinder head 1, the retaining ring 3 is threadedly connected to the stopper of the cylinder head 1, the buffer ring 5 is fixedly connected to the outside of the piston rod 4, and the buffer sleeve 6 is floatingly connected to the inside of the cylinder head 1.

[0029] Among them, two throttle holes are opened at the stop of the cylinder head 1, and the side of the disc 2 close to the cylinder head 1 is in contact with the throttle holes. The inner diameter of the disc 2 is adapted to the outer diameter of the stop of the cylinder head 1.

[0030] When the oil pressure inside the cylinder head 1 changes, the disc 2 can cover the throttle hole on the stopper of the cylinder head 1, so that the hydraulic oil can only flow through the buffer gap inside the cylinder head 1, thereby playing a buffering role, improving the buffering effect, reducing the impact force of the piston rod 4 on the cylinder head 1, and extending the service life of the hydraulic cylinder.

[0031] Figure 1 In the embodiment, a buffer cavity is provided inside the cylinder head 1 , a buffer ring 5 is fixedly connected to the outer surface of the piston rod 4 , and the buffer ring 5 is slidably connected to the inside of the buffer sleeve 6 .

[0032] When the piston rod 4 starts to start, the oil inlet of the cylinder head 1 is pressurized and enters the buffer chamber. Due to the small pressure area and the small buffer gap, the start-up is slow. At this time, the oil pressure at the throttle hole of the stop port of the cylinder head 1 pushes the disc 2 open and pushes the disc 2 toward the gear ring 3, so that the oil pressure enters the piston chamber in advance without passing through the buffer gap, causing the pressure area to increase instantly, thereby starting the hydraulic cylinder quickly.

[0033] The outer diameter of the retaining ring 3 is adapted to the outer diameter of the cylinder head 1 , and the inner diameter of the retaining ring 3 is smaller than the outer diameter of the buffer ring 5 .

[0034] Under the limiting effect of the stop ring 3, the disc 2 and the buffer ring 5 can be limited when they move.

[0035] Specifically, the piston rod 4 is slidably connected to the interior of the cylinder head 1 , and the outer diameter of the piston rod 4 is adapted to the inner diameter of the cylinder head 1 .

[0036] Figure 4 In the embodiment, the outer surface of the buffer sleeve 6 is provided with two mounting grooves, and the interiors of the two mounting grooves are both sleeved with O-rings.

[0037] Under the buffering action of the buffer sleeve 6 and the O-ring, the buffering force and stroke can be easily adjusted to adapt to different working conditions. The design structure is simple, with good reliability and practicality, and no risk of seal leakage, which greatly extends the service life of the hydraulic cylinder. At the same time, the entire device is easy to replace and maintain, reducing maintenance costs. The disc-type design makes the buffer device compact in structure, occupies little space, and is suitable for various installation environments.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A disc-type buffer device, comprising a cylinder head (1), a piston rod (4) slidably connected to the interior of the cylinder head (1), and a buffer device arranged outside the cylinder head (1), characterized in that: The buffer device comprises a disc (2), a retaining ring (3), a buffer ring (5), and a buffer sleeve (6); the disc (2) is floatingly connected to the outer surface of the stopper of the cylinder head (1); the retaining ring (3) is threadedly connected to the stopper of the cylinder head (1); the buffer ring (5) is fixedly connected to the outside of the piston rod (4); and the buffer sleeve (6) is floatingly connected to the inside of the cylinder head (1).

2. A disc-type buffer device according to claim 1, characterized in that: Two throttle holes are provided at the stop of the cylinder head (1), and the side of the disc (2) close to the cylinder head (1) abuts against the throttle holes. The inner diameter of the disc (2) is adapted to the outer diameter of the stop of the cylinder head (1).

3. The disc-type buffer device according to claim 1, characterized in that: A buffer cavity is provided inside the cylinder head (1), the buffer ring (5) is fixedly connected to the outer surface of the piston rod (4), and the buffer ring (5) is slidably connected to the inside of the buffer sleeve (6).

4. The disc-type buffer device according to claim 1, characterized in that: The outer diameter of the retaining ring (3) is adapted to the outer diameter of the cylinder head (1), and the inner diameter of the retaining ring (3) is smaller than the outer diameter of the buffer ring (5).

5. The disc-type buffer device according to claim 1, characterized in that: The piston rod (4) is slidably connected to the interior of the cylinder head (1), and the outer diameter of the piston rod (4) is adapted to the inner diameter of the cylinder head (1).

6. The disc-type buffer device according to claim 1, characterized in that: The outer surface of the buffer sleeve (6) is provided with two mounting grooves, and an O-type sealing ring is sleeved inside the two mounting grooves.

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