CN219345355U - Hydraulic buffer with volume compensation function - Google Patents

Abstract

The hydraulic buffer with the capacity compensation function comprises an oil shell, wherein the oil shell is cylindrical with a bottom, an inner hole of the oil shell forms a buffer cavity, a piston assembly is slidably arranged in the buffer cavity, a buffer rod is connected with the piston assembly, penetrates through an end cover covered on an opening of the buffer cavity and extends out of the oil shell, and a damping hole is formed in the piston assembly to conduct a rod cavity and a rodless cavity; the method is characterized in that: the buffer rod is characterized in that a sealing ring and an elastic ring are sleeved on the buffer rod from inside to outside in the rod cavity, and the sealing ring and the elastic ring are relatively sealed with the buffer cavity and the buffer rod. The beneficial effects of the utility model are as follows: the sealing ring and the elastic ring are arranged in the oil cylinder, the elastic function of the elastic ring is utilized, the sealing ring is matched to form a third cavity, and the third cavity can compensate hydraulic oil in the rod cavity and the rodless cavity, so that the rod cavity and the rodless cavity are always in a full oil state, vacuum bubbles are avoided, and damping is consistent when the rod cavity and the rodless cavity act.

Description

Hydraulic buffer with volume compensation function

Technical Field

The utility model relates to a buffer, in particular to a hydraulic buffer with a volume compensation function.

Background

A "damper" is an object for providing a cushioning effect, and may be mounted on a building, furniture or a vehicle, and the basic form and use manner of the damper may be different depending on the use field, and in terms of the damper mounted on movable articles such as a door, a cabinet door and a drawer, it generally comprises: an outer tube unit having a liquid receiving area, and a piston unit inserted into the outer tube unit, the piston unit having a piston slidably mounted in the liquid receiving area. When the movable object is opened and closed, the piston is driven to axially slide relative to the outer tube unit and push the liquid in the liquid containing area to flow, so that the movable object can generate a buffering effect when the movable object is closed by virtue of the design of the damper. However, in the existing production of the damper, when the hydraulic oil is added and then the cover is closed, a small part of air is remained in the cylinder more or less, so that the air occupies a part of the volume of the hydraulic oil in the using process of the damper, and the damper is in a vibration-free state when the damper acts or when the damper has a maximum stroke or a minimum stroke due to inconsistent damping performance of the air and the hydraulic oil in the acting process. In addition, the volumes at the two ends of the piston of the damper cannot reach a hundred percent accuracy, when the oil on one side is insufficient to compensate the oil on the other side, vacuum bubbles can be formed in hydraulic oil under the action of the piston, when the hydraulic oil on the side is compressed, the vacuum bubbles can be compressed instantly, the condition that the damping force is broken and cliff type is reduced in the process is caused, and therefore the damper is unstable in movement, and further improvement is needed.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the hydraulic buffer with the volume compensation function, which has the advantages of simple structure, convenient production and processing, stable damping effect and consistent and stable damping force.

The utility model aims at realizing the following modes: the hydraulic buffer with the capacity compensation function comprises an oil shell, wherein the oil shell is cylindrical with a bottom, an inner hole of the oil shell forms a buffer cavity, a piston assembly is slidably arranged in the buffer cavity, a rodless cavity is formed between the piston assembly and the bottom of the buffer cavity, a rod cavity is formed between the piston assembly and the open end of the buffer cavity, the piston assembly is connected with a buffer rod, after penetrating through an end cover covered on the opening of the buffer cavity, the buffer rod extends out of the oil shell, and a damping hole is formed in the piston assembly to conduct the rod cavity and the rodless cavity; the method is characterized in that: the buffer rod is characterized in that a sealing ring and an elastic ring are sleeved on the buffer rod from inside to outside in the rod cavity, and the sealing ring and the elastic ring are relatively sealed with the buffer cavity and the buffer rod.

The upper end and the lower end of the sealing ring are respectively covered with a stabilizing ring and a fixing ring.

The stabilizing ring comprises a guide cylinder and a pressure plate arranged on the cylindrical surface of the guide cylinder, correspondingly, the upper end surface of the sealing ring is provided with a concave lower positioning hole, and the lower end surface of the guide cylinder extends into the lower positioning hole; the lower end face of the elastic ring is provided with an upper positioning hole, and the upper end face of the guide cylinder extends into the upper positioning hole.

The section of the elastic ring is of a bowl-shaped structure with an opening at the upper end, and the upper end face of the elastic ring is propped against the end cover.

The lower end face of the sealing ring is provided with an upward concave deformation groove, an outward convex outer sealing ring is arranged on the outer cylindrical surface of the sealing ring, and an inward convex inner sealing ring is arranged on the inner hole of the sealing ring. The beneficial effects of the utility model are as follows: 1. simple structure, low production cost and market competitiveness improvement. 2. The sealing ring and the elastic ring are arranged in the oil cylinder, the elastic function of the elastic ring is utilized, the sealing ring is matched to form a third cavity, and the third cavity can compensate hydraulic oil in the rod cavity and the rodless cavity, so that the rod cavity and the rodless cavity are always in a full oil state, vacuum bubbles are avoided, and damping is consistent when the rod cavity and the rodless cavity act.

Drawings

FIG. 1 is a general assembly view of the structure of the present utility model.

Fig. 2 and 3 are structural assembly views of the present utility model.

Fig. 4 and 5 are schematic diagrams of the inward compression buffering process of the buffer according to the present utility model.

Fig. 6 and 7 are schematic diagrams of the outward stretching buffering process of the buffer in the present utility model.

FIG. 8 is a schematic diagram of the deformation of the elastic ring according to the present utility model.

Description of the embodiments

The utility model is described in more detail below with reference to the accompanying drawings. The hydraulic buffer with the capacity compensation function comprises an oil shell 1, wherein the oil shell 1 is in a cylinder shape with a bottom, an inner hole of the oil shell 1 forms a buffer cavity, a piston assembly 2 is slidably arranged in the buffer cavity, a rodless cavity 3 is formed between the piston assembly 2 and the bottom of the buffer cavity, a rod cavity 4 is formed between the piston assembly 2 and the open end of the buffer cavity, the piston assembly 2 is connected with a buffer rod 5, after penetrating through an end cover 6 covered on the opening of the buffer cavity, the buffer rod extends out of the oil shell 1, and a damping hole is formed in the piston assembly to conduct the rod cavity and the rodless cavity; the method is characterized in that: the buffer rod 5 is sleeved with a sealing ring 7 and an elastic ring 8 from inside to outside in the rod cavity 4, and the sealing ring 7 and the elastic ring 8 form relative sealing with the buffer cavity and the buffer rod 5.

The upper end and the lower end of the sealing ring 7 are respectively covered with a stabilizing ring 9 and a fixing ring 10.

The stabilizing ring 9 comprises a guide cylinder 91 and a pressure plate 92 arranged on the cylindrical surface of the guide cylinder, correspondingly, the upper end surface of the sealing ring 7 is provided with a concave lower positioning hole 71, and the lower end surface of the guide cylinder 91 extends into the lower positioning hole 71; the lower end face of the elastic ring 8 is provided with an upper positioning hole 81, and the upper end face of the guide cylinder 91 extends into the upper positioning hole 81.

The section of the elastic ring 8 is of a bowl-shaped structure with an opening at the upper end, and the upper end face of the elastic ring 8 is propped against the end cover 6.

The lower end face of the sealing ring 7 is provided with an upward concave deformation groove 72, the outer cylindrical surface of the sealing ring 7 is provided with an outward convex outer sealing ring 73, and the inner hole of the sealing ring 7 is provided with an inward convex inner sealing ring 74.

Working principle: fig. 4 and 5 are schematic diagrams of the buffer compression buffering process in this case. When the inward pressure F is applied to the buffer rod 51 of the buffer, the oil in the rodless cavity flows into the rod-like cavity through the damping hole of the piston assembly, and the oil in the rod-like cavity can displace the sealing ring due to the volume difference between the rodless cavity and the rod-like cavity, so that the elastic ring is pressed to elastically deform to compress the volume in the third cavity, and the hydraulic oil in the rod-like cavity can completely enter the rodless cavity, thereby realizing whole-process compression buffering.

As shown in fig. 5 and 6, which are schematic diagrams of the stretching and buffering process of the buffer in the present case, when a reverse pulling force F is applied to the buffer rod, hydraulic oil in the rod cavity flows to the cavity 1 after passing through the damping hole on the piston assembly, and the elastic ring resets under the elastic action of the elastic ring, so that the sealing ring is reversely pushed to move downwards for resetting. Forcing the volume within the lumen of the rod to decrease.

Compared with the prior art, the hydraulic buffer has the advantages that the third cavity is isolated in the rod cavity through the sealing ring, the elastic ring is arranged in the third cavity, the sealing ring is pushed to move through deformation of the elastic ring, the volume of the rod cavity is matched with the required volume when the piston assembly moves, vacuum bubbles are formed in the rod cavity or the rodless cavity when the piston assembly is prevented from moving, damping force during piston action is affected, and the hydraulic buffer is uniform in damping force during whole buffer formation.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (5)

1. The hydraulic buffer with the volume compensation function comprises an oil shell (1), wherein the oil shell (1) is in a cylindrical shape with a bottom, an inner hole of the oil shell (1) forms a buffer cavity, a piston assembly (2) is slidably arranged in the buffer cavity, a rodless cavity (3) is formed between the piston assembly (2) and the bottom of the buffer cavity, a rod cavity (4) is formed between the piston assembly (2) and the open end of the buffer cavity, a buffer rod (5) is connected with the piston assembly (2), and after penetrating through an end cover (6) covered on the opening of the buffer cavity, the buffer rod extends out of the oil shell (1), and a damping hole is formed in the piston assembly to conduct the rod cavity and the rodless cavity; the method is characterized in that: the rod cavity (4) is internally sleeved with a sealing ring (7) and an elastic ring (8) from inside to outside on the buffer rod (5), and the sealing ring (7) and the elastic ring (8) form relative sealing with the buffer cavity and the buffer rod (5).

2. The hydraulic buffer with capacity compensation function according to claim 1, wherein: the upper end and the lower end of the sealing ring (7) are respectively covered with a stabilizing ring (9) and a fixing ring (10).

3. A hydraulic buffer with volume compensation function according to claim 2, characterized in that: the stabilizing ring (9) comprises a guide cylinder (91) and a pressure plate (92) arranged on the cylindrical surface of the guide cylinder, correspondingly, a concave lower positioning hole (71) is arranged on the upper end surface of the sealing ring (7), and the lower end surface of the guide cylinder (91) extends into the lower positioning hole (71); the lower end face of the elastic ring (8) is provided with an upper positioning hole (81), and the upper end face of the guide cylinder (91) extends into the upper positioning hole (81).

4. The hydraulic buffer with capacity compensation function according to claim 1, wherein: the section of the elastic ring (8) is of a bowl-shaped structure with an opening at the upper end, and the upper end face of the elastic ring (8) is propped against the end cover (6).

5. A hydraulic buffer with volume compensation function according to claim 2, characterized in that: the lower end face of the sealing ring (7) is provided with an upward concave deformation groove (72), the outer cylindrical surface of the sealing ring (7) is provided with an outward convex outer sealing ring (73), and the inner hole of the sealing ring (7) is provided with an inward convex inner sealing ring (74).

Images