Sealing and assembling device for piston rod of hydraulic cylinder

Abstract

The utility model discloses a hydraulic cylinder piston rod seal assembly device, which relates to the technical field of hydraulic cylinder piston rods, and comprises a support plate and a seal ring, the circumferential outer wall of the support plate is provided with a plurality of first mounting grooves, the inner walls of the first mounting grooves are rotatably connected with guide rods, and the middle part of the bottom of the support plate is rotatably connected with a threaded screw rod; a movable plate is slidably arranged on the outer wall of the threaded lead screw through threads, a plurality of second mounting grooves are formed in the circumferential outer wall of the movable plate, connecting rods are rotatably connected to the inner walls of the second mounting grooves, the connecting rods are rotatably connected with the guide rods, and the outer walls of the guide rods are sleeved with force application rings. By means of the hydraulic cylinder sealing ring replacing device, hydraulic cylinder sealing rings of different sizes can be replaced conveniently.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder piston rod technical field especially relates to a kind of hydraulic cylinder piston rod sealing assembly device. BACKGROUND

[0002] Hydraulic cylinder is composed of cylinder, cylinder cover, piston, piston rod, sealing device, buffer device, exhaust device etc..Among them, piston rod connects piston and transmits motion, cylinder and cylinder cover constitute the space of containing hydraulic oil, piston divides it into two chambers.Sealing device ensures that hydraulic oil does not leak, buffer device reduces motion impact, exhaust device exhausts the air in oil cylinder, when hydraulic cylinder works, cylinder body needs to be filled with high-pressure oil frequently, piston rod moves, piston rod frequent telescoping causes piston rod sealing ring and cylinder wear and tear cause hydraulic cylinder internal leakage, so it needs to use hydraulic cylinder piston rod sealing assembly device to replace sealing ring.

[0003] Announcement No. CN219925915U discloses a kind of hydraulic cylinder piston rod sealing assembly device, including sealing guide table and force circular ring, sealing guide table adopts conical table structure, sealing guide table lower part is inserted into the cylinder body of hydraulic cylinder, sealing guide table bottom is located at piston rod sealing groove, sealing guide table is set with force circular ring;The hydraulic cylinder piston rod sealing assembly device designed by the utility model is simple and practical, force circular ring is uniformly stressed, sealing ring is perfectly pressed into sealing groove, surface smears lubricating oil, it is extremely easy to install after sealing lubrication;It is simple and practical to install, has significant improvement for assembly quality and safety efficiency, improves the maintenance efficiency of hydraulic cylinder.

[0004] However, similar to the above-mentioned hydraulic cylinder piston rod sealing assembly device, when in use, the size of the sealing guide table cannot be adjusted, so when replacing the hydraulic cylinder sealing ring of different sizes, a sealing guide table suitable for the size needs to be provided, which is relatively inconvenient. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides a kind of hydraulic cylinder piston rod sealing assembly device.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A kind of hydraulic cylinder piston rod sealing assembly device, including support plate and sealing ring, the circumferential outer wall of the support plate is equipped with a plurality of first installation slot, the inner wall of the first installation slot is rotatably connected with guide rod, the middle part of the bottom of the support plate is rotatably connected with threaded lead screw, the outer wall of the threaded lead screw is slidably provided with movable plate by thread, the circumferential outer wall of the movable plate is equipped with a plurality of second installation slot, the inner wall of the second installation slot is rotatably connected with connecting rod, the connecting rod is rotatably connected between the guide rod, the outer wall of a plurality of guide rods is sleeved with force circular ring.

[0008] The utility model further sets up, the bottom fixed connection of screw rod connects with the limit board.

[0009] The utility model further sets up, the bottom of guide rod is hemispherical.

[0010] The utility model further sets up, the top fixed connection of support board has installation casing, the top inner wall and bottom inner wall rotation of installation casing are connected with worm wheel, fixed setting between worm wheel with screw rod, the both sides inner wall rotation of installation casing are connected with the worm that is adapted with worm wheel.

[0011] The utility model further sets up, one side outer wall rotation of installation casing is connected with knob, fixed setting between knob with worm.

[0012] The utility model further sets up, the force ring is composed of multiple arc-shaped connecting pieces, one end of connecting piece is provided with movable slot, the other end of connecting piece is fixedly connected with movable rod that is insertedly matched with movable slot, the section of movable rod and movable slot are all arc-shaped.

[0013] The utility model further sets up, and fixed connection has reset spring between movable slot with movable rod.

[0014] The utility model further sets up, and the outer wall of multiple guide rods is smeared with lubricating oil.

[0015] The utility model has the advantages that:

[0016] 1、The hydraulic cylinder piston rod sealing assembly device, when using, first adjust the size of the device according to the size of the hydraulic cylinder, at this time, rotate the screw rod, under the limiting action of connecting rod, the movable plate moves on the screw rod, and then drive multiple guide rods to expand outward or shrink inward synchronously through the connecting rod, so as to adjust the size of the whole device, so that the bottom of multiple guide rods is matched with the size of the hydraulic cylinder, and the bottom of the guide rod is placed in the sealing groove of the hydraulic cylinder sealing ring, then the sealing ring is sleeved on the outer wall of multiple guide rods, the sealing ring is uniformly stressed through the force ring, and the sealing ring is pushed into the sealing groove, which is simple and convenient to operate.

[0017] 2、The hydraulic cylinder piston rod sealing assembly device, through worm wheel and worm, can reduce the rotation speed of screw rod, and further reduce the moving speed of movable plate, which can further increase the accuracy of device size adjustment.

[0018] 3、The hydraulic cylinder piston rod sealing assembly device, through movable rod and movable slot, can adjust the diameter of the force ring according to the angle of the guide rod during use, so as to be suitable for different size use occasions. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the hydraulic cylinder piston rod sealing assembly device proposed in this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the movable plate and connecting rod of the hydraulic cylinder piston rod sealing assembly device proposed in this utility model.

[0021] Figure 3 This is a partial top sectional view of the worm gear and worm of a hydraulic cylinder piston rod sealing assembly device proposed in this utility model.

[0022] Figure 4 This is a partial top sectional view of the reset spring and movable rod of a hydraulic cylinder piston rod sealing assembly device proposed in this utility model.

[0023] In the diagram: 1. Support plate; 2. Force-applying ring; 201. Connector; 202. Movable rod; 203. Movable groove; 204. Return spring; 3. Guide rod; 4. Mounting housing; 5. First mounting groove; 6. Sealing ring; 7. Threaded screw; 8. Limiting plate; 9. Movable plate; 10. Second mounting groove; 11. Connecting rod; 12. Worm gear; 13. Worm; 14. Knob. Detailed Implementation

[0024] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0025] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0026] In the description of this patent, it should be understood that the terms “center,” “upper,” “lower,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0027] In the description of the patent, it is necessary to explain that, unless otherwise expressly specified and limited, the terms "mount", "connect", "connect", "set" should be understood broadly, for example, it can be fixedly connected, set, or it can be detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the patent can be understood according to the specific circumstances.

[0028] Referring to Figure 1 And Figure 2 A hydraulic cylinder piston rod sealing assembly device, comprising a support plate 1 and a sealing ring 6, a plurality of first installation grooves 5 are formed on the circumferential outer wall of the support plate 1, the inner wall of the first installation groove 5 is rotatably connected with a guide rod 3, the middle part of the bottom of the support plate 1 is rotatably connected with a threaded screw rod 7, the outer wall of the threaded screw rod 7 is slidably provided with a movable plate 9 through a thread, a plurality of second installation grooves 10 are formed on the circumferential outer wall of the movable plate 9, the inner wall of the second installation groove 10 is rotatably connected with a connecting rod 11, the connecting rod 11 is rotatably connected between the guide rod 3, the outer wall of the plurality of guide rods 3 is sleeved with a force- applying circular ring 2; the bottom of the threaded screw rod 7 is fixedly connected with a limiting plate 8, through the limiting plate 8, the movable plate 9 is placed to be separated from the threaded screw rod 7; the bottom end of the guide rod 3 is hemispherical, the hemispherical design is more convenient for the sealing ring 6 to enter the sealing groove.

[0029] Referring to Figure 2 And Figure 3 The top of the support plate 1 is fixedly connected with a mounting shell 4, the top inner wall and the bottom inner wall of the mounting shell 4 are rotatably connected with a worm gear 12, the worm gear 12 and the threaded screw rod 7 are fixedly arranged, the two side inner walls of the mounting shell 4 are rotatably connected with a worm 13 matched with the worm gear 12, through the speed reduction structure of the worm gear 12 and the worm 13, the accuracy of size adjustment is increased, through the self-locking structure of the worm gear 12 and the worm 13, the threaded screw rod 7 is prevented from rotating to cause size change during use; one side outer wall of the mounting shell 4 is rotatably connected with a knob 14, the knob 14 and the worm 13 are fixedly arranged, through the knob 14, the worm 13 is conveniently rotated.

[0030] Referring to Figure 1 And Figure 4 The force- applying circular ring 2 is composed of a plurality of arc-shaped connecting pieces 201, one end of the connecting piece 201 is provided with a movable groove 203, the other end of the connecting piece 201 is fixedly connected with a movable rod 202 matched with the movable groove 203, the movable groove 203 and the movable rod 202 are both arc-shaped in cross section, through the movable groove 203 and the movable rod 202, the force- applying circular ring 2 can be stretched and contracted, thereby the diameter size is adjusted; the movable groove 203 and the movable rod 202 are fixedly connected with a reset spring 204, through the reset spring 204, the plurality of connecting pieces 201 can be driven to reset; the outer wall of the plurality of guide rods 3 is smeared with lubricating oil, the lubricating oil is smeared, the sealing ring 6 is more conveniently slid on the guide rod 3

[0031] Working principle: in use, first according to the size of the hydraulic cylinder adjusting device size, at this time, rotate threaded rod 7, under the limiting action of connecting rod 11, movable plate 9 moves on threaded rod 7, and then drive multiple guide rods 3 to expand outward or shrink inward synchronously through connecting rod 11, so as to adjust the size of the whole device, make the bottom of multiple guide rods 3 adapt to the size of the hydraulic cylinder, and place the bottom of guide rod 3 at the sealing groove of hydraulic cylinder sealing ring 6, then put sealing ring 6 on the outer wall of multiple guide rods 3, make sealing ring 6 bear force evenly through force ring 2, and push sealing ring 6 into the sealing groove, simple operation, easy to operate.

[0032] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A hydraulic cylinder piston rod sealing assembly device, comprising a support plate (1) and a sealing ring (6), characterized in that, The outer circumferential wall of the support plate (1) is provided with a plurality of first mounting grooves (5), and the inner wall of the first mounting groove (5) is rotatably connected to a guide rod (3). The bottom center of the support plate (1) is rotatably connected to a threaded screw (7). The outer wall of the threaded screw (7) is provided with a movable plate (9) through thread sliding. The outer circumferential wall of the movable plate (9) is provided with a plurality of second mounting grooves (10), and the inner wall of the second mounting groove (10) is rotatably connected to a connecting rod (11). The connecting rod (11) is rotatably connected to the guide rod (3). The outer wall of the plurality of guide rods (3) is sleeved with a force-applying ring (2).

2. The hydraulic cylinder piston rod sealing assembly device according to claim 1, characterized in that, The bottom of the threaded screw (7) is fixedly connected to a limiting plate (8).

3. The hydraulic cylinder piston rod sealing assembly device according to claim 1, characterized in that, The bottom end of the guide rod (3) is hemispherical.

4. The hydraulic cylinder piston rod sealing assembly device according to claim 1, characterized in that, The top of the support plate (1) is fixedly connected to the mounting housing (4), and the top inner wall and bottom inner wall of the mounting housing (4) are rotatably connected to the worm gear (12). The worm gear (12) is fixedly disposed with the threaded screw (7), and the inner walls on both sides of the mounting housing (4) are rotatably connected to the worm (13) adapted to the worm gear (12).

5. A hydraulic cylinder piston rod sealing assembly device according to claim 4, characterized in that, A knob (14) is rotatably connected to one side of the outer wall of the mounting housing (4), and the knob (14) is fixedly disposed between the worm gear (13).

6. The hydraulic cylinder piston rod sealing assembly device according to claim 1, characterized in that, The force-applying ring (2) is composed of multiple arc-shaped connectors (201). One end of each connector (201) has a movable groove (203), and the other end of each connector (201) is fixedly connected to a movable rod (202) that is compatible with the movable groove (203). The cross-sections of the movable rod (202) and the movable groove (203) are both arc-shaped.

7. A hydraulic cylinder piston rod sealing assembly device according to claim 6, characterized in that, A return spring (204) is fixedly connected between the movable groove (203) and the movable rod (202).

8. A hydraulic cylinder piston rod sealing assembly device according to claim 7, characterized in that, The outer walls of the multiple guide rods (3) are coated with lubricating oil.

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