CN219639168U - Piston sealing structure for hydraulic cylinder - Google Patents

Abstract

The utility model discloses a piston sealing structure for a hydraulic cylinder, which comprises a frame, wherein a cylinder is fixedly connected inside the frame, a piston is movably arranged inside the cylinder, the piston is fixedly connected with a piston rod movably arranged on the frame, the frame comprises two symmetrically arranged connecting plates, the connecting plates are fixedly connected through a plurality of connecting rods, the cylinder is cylindrical, two ends of the cylinder are respectively in an opening shape, and two ends of the cylinder are respectively and fixedly connected with the two connecting plates.

Description

Piston sealing structure for hydraulic cylinder

Technical Field

The utility model relates to the technical field of mechanical equipment, in particular to a piston sealing structure for a hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device are necessary for other devices depending on the specific application.

The existing piston sealing structure for the hydraulic cylinder is used for sealing a hydraulic bin by adopting a single sealing structure, the problems of poor wear resistance and poor sealing performance exist under long-term use, abnormal vibration and vibration of the hydraulic cylinder can be caused by large friction force, and the working of the hydraulic cylinder is affected by poor sealing performance.

For this purpose, a piston seal for a hydraulic cylinder is proposed.

Disclosure of Invention

The present utility model is directed to a piston sealing structure for a hydraulic cylinder, which solves the above-mentioned problems of the prior art.

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a piston seal structure for pneumatic cylinder, includes the frame, the inside fixedly connected with cylinder of frame, the inside activity of cylinder is equipped with the piston, the piston with the activity sets up piston rod fixed connection in the frame, the frame includes the connecting plate that two symmetries set up, through a plurality of connecting rods fixed connection between the connecting plate, the cylinder is cylindrically, just the both ends of cylinder are the opening form respectively, the both ends of cylinder respectively with two connecting plate fixed connection, one side the terminal surface of connecting plate runs through and is equipped with the positioning sleeve, the inside coaxial sealing sleeve that is equipped with of positioning sleeve, the positioning sleeve with be equipped with the sealing ring between the sealing sleeve, sealing sleeve's internal surface with piston rod sliding connection, the piston includes the piston main part, the outer peripheral face of piston main part is overlapped respectively and is equipped with guide ring and piston sealing ring.

According to the technical scheme, the outer peripheral surface of the piston main body is coaxially provided with the mounting grooves, the two sides of the mounting grooves are provided with the rectangular grooves, the number of the rectangular grooves is multiple, the rectangular grooves are uniformly distributed in an annular shape with the axis of the piston main body, and the surface of the piston sealing ring is provided with the connecting blocks corresponding to the rectangular grooves.

According to the technical scheme, the piston rod with link to each other through buffer gear between the piston main part, buffer gear includes the buffer ring, the buffer ring is cylindrically, and the both ends of buffer ring are the opening form respectively, the outer peripheral face of buffer ring is equipped with the ring channel, the internal surface fixedly connected with blotter of ring channel, the terminal surface of piston main part runs through and is equipped with the circular slot, the blotter with fixed connection between the circular slot, the piston rod with buffer ring fixed connection.

According to the technical scheme, one end fixedly connected with spliced pole of piston rod, the spliced pole passes the buffer ring, just the outer peripheral face of spliced pole corresponds the both ends of buffer ring and is equipped with the spacing ring respectively.

According to the technical scheme, the number of the guide rings is two, and the two guide rings are arranged on two sides of the piston sealing ring.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the frame is provided, the cylinder is fixedly arranged in the frame, the piston is arranged in the cylinder, the piston is driven to move by the piston rod, the positioning sleeve is fixedly connected with the sealing sleeve by the sealing ring and is movably connected with the sealing sleeve by the piston rod, the tightness of the piston rod during movement is ensured, the buffer effect is achieved by the sealing ring, the abrasion during working is reduced, the durability is improved, the guide ring and the piston sealing ring are arranged on the piston main body, the sealing performance is provided by the piston sealing tube, the guide ring plays a guide role on the movement of the piston, and the piston is prevented from vibrating in the cylinder, so that the abrasion resistance and the tightness are improved.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic view of a front cross-sectional structure of the present utility model;

FIG. 2 is a schematic view of the piston body structure of the present utility model;

FIG. 3 is a schematic diagram of the structure of the present utility model;

in the figure: 1-frame, 2-cylinder, 3-piston rod, 4-locating sleeve, 5-sealing sleeve, 6-sealing ring, 7-piston main body, 8-guiding ring, 9-piston sealing ring, 10-mounting groove, 11-rectangular groove, 12-connecting block, 13-buffer ring, 14-annular groove, 15-buffer pad, 16-circular groove, 17-connecting column.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, the present utility model provides the following technical solutions: the utility model provides a piston seal structure for pneumatic cylinder, including frame 1, as shown in fig. 3, the inside fixedly connected with cylinder 2 of frame 1, the inside activity of cylinder 2 is equipped with the piston, the piston with the activity set up piston rod 3 fixed connection on frame 1, frame 1 includes two symmetrical arrangement's connecting plates, the connecting plates are rectangular plate respectively, two connecting plates parallel arrangement, through a plurality of connecting rods fixed connection between the connecting plates, in this embodiment the quantity of connecting rod is four, four connecting rods are located the four corners department of connecting plate respectively, cylinder 2 is cylindrical, and the both ends of cylinder 2 are the opening form respectively, the both ends of cylinder 2 respectively with two connecting plates fixed connection, one side the terminal surface of connecting plate runs through and is equipped with positioning sleeve 4, as shown in fig. 1, positioning sleeve 4 and cylinder 2 coaxial arrangement, positioning sleeve 4's inside coaxial arrangement has sealing sleeve 5, sealing sleeve 4 and positioning sleeve 4 coaxial arrangement, be equipped with sealing ring 6 between sealing ring 6 fills the gap between positioning sleeve 4 and the sealing sleeve 5, guarantee device's the sealing sleeve's the sealing ring 7 is equipped with annular ring 7 and piston 8 in the annular body, and the piston 8 is equipped with the annular ring-shaped body 7 respectively to be equipped with the piston sleeve's the seal ring 7 respectively, and the piston 8 is equipped with the piston 8 respectively in the annular body's the piston 8 is equipped with the seal ring-guide sleeve's the axial face respectively;

specifically, the outer peripheral surface of the piston main body 7 is coaxially provided with mounting grooves 10, two sides of the mounting grooves 10 are provided with rectangular grooves 11, the number of the rectangular grooves 11 is a plurality, the rectangular grooves 11 are uniformly distributed in an annular shape with the axis of the piston main body 7, connecting blocks 12 are arranged on the surfaces of the piston sealing rings 9 corresponding to the rectangular grooves 11, the piston sealing rings 9 are positioned through the connecting blocks 12, the piston sealing rings 9 are tightly attached to the piston main body 7, the piston sealing rings 9 are prevented from moving in the use process, and the tightness is ensured;

specifically, the piston rod 3 is connected with the piston main body 7 through a buffer mechanism, the buffer mechanism comprises a buffer ring 13, the buffer ring 13 is cylindrical, two ends of the buffer ring 13 are respectively in an opening shape, an annular groove 14 is formed in the outer circumferential surface of the buffer ring 13, the annular groove 14 and the buffer ring 13 are coaxially arranged, a buffer pad 15 is fixedly connected to the inner surface of the annular groove 14, the buffer pad 15 is annular and made of elastic materials, a circular groove 16 is formed in the end face of the piston main body 7 in a penetrating mode, the buffer pad 15 is fixedly connected with the circular groove 16, and the piston rod 3 is fixedly connected with the buffer ring 13, so that when the piston main body 7 is driven to move by the piston rod 3, the buffer pad 15 plays a role in buffering, and damage to the cylinder 2 or the piston main body 7 is prevented;

specifically, one end of the piston rod 3 is fixedly connected with a connecting column 17, the connecting column 17 passes through the buffer ring 13, and limiting rings are respectively arranged at two ends of the outer peripheral surface of the connecting column 17 corresponding to the buffer ring 13;

specifically, the number of the guide rings 8 is two, and the two guide rings 8 are arranged at two sides of the piston sealing ring 9;

when the piston rod 3 drives the piston main body 7 to move, the piston main body 7 reciprocates in the cylinder 2, the guide ring 8 plays a guide role, the piston sealing ring 9 plays a sealing role, the buffer pad 15 plays a buffering role, and damage to the cylinder 2 or the piston main body 7 is prevented.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The utility model provides a piston seal structure for pneumatic cylinder, includes frame (1), the inside fixedly connected with cylinder (2) of frame (1), the inside activity of cylinder (2) is equipped with the piston, the piston is in with the activity setting piston rod (3) fixed connection on frame (1), its characterized in that: frame (1) is including the connecting plate that two symmetries set up, through a plurality of connecting rod fixed connection between the connecting plate, cylinder (2) are cylindrical, just the both ends of cylinder (2) are the opening form respectively, the both ends of cylinder (2) respectively with two connecting plate fixed connection, one side the terminal surface of connecting plate runs through and is equipped with positioning sleeve (4), the inside coaxial sealing sleeve (5) that is equipped with of positioning sleeve (4), positioning sleeve (4) with be equipped with sealing ring (6) between sealing sleeve (5), sealing sleeve (5)'s internal surface with piston rod (3) sliding connection, the piston includes piston main part (7), the outer peripheral surface of piston main part (7) is equipped with guide ring (8) and piston sealing ring (9) respectively.

2. A piston seal for a hydraulic cylinder according to claim 1, wherein: the piston is characterized in that mounting grooves (10) are coaxially formed in the outer peripheral surface of the piston main body (7), rectangular grooves (11) are formed in two sides of the mounting grooves (10), the number of the rectangular grooves (11) is multiple, the rectangular grooves (11) are uniformly distributed in an annular mode through the axis of the piston main body (7), and connecting blocks (12) are arranged on the surfaces of the piston sealing rings (9) corresponding to the rectangular grooves (11).

3. A piston seal for a hydraulic cylinder according to claim 2, wherein: the piston rod (3) with link to each other through buffer gear between piston body (7), buffer gear includes buffer ring (13), buffer ring (13) are cylindricly, and the both ends of buffer ring (13) are the opening form respectively, the outer peripheral face of buffer ring (13) is equipped with ring channel (14), the internal surface fixedly connected with blotter (15) of ring channel (14), the terminal surface of piston body (7) runs through and is equipped with circular slot (16), blotter (15) with fixed connection between circular slot (16), piston rod (3) with buffer ring (13) fixed connection.

4. A piston seal for a hydraulic cylinder according to claim 3, wherein: one end of the piston rod (3) is fixedly connected with a connecting column (17), the connecting column (17) penetrates through the buffer ring (13), and limiting rings are respectively arranged at two ends, corresponding to the buffer ring (13), of the outer peripheral surface of the connecting column (17).

5. A piston seal for a hydraulic cylinder as defined in claim 4, wherein: the number of the guide rings (8) is two, and the two guide rings (8) are arranged on two sides of the piston sealing ring (9).