Mounting device of piston sealing ring

Abstract

The utility model discloses a mounting device of a piston sealing ring, and aims to solve the technical problem that the sealing ring is non-uniform in stress when being assembled. The device comprises a sleeve, a pressing ring mechanism and a cone mandrel, a through hole for installing the cone mandrel is formed in the sleeve, the pressing ring mechanism is installed on the lower portion of the sleeve, a taper part for installing a sealing ring is arranged in the middle of the cone mandrel, the cone mandrel penetrates through the pressing ring mechanism to be installed in the sleeve, and after installation, the taper part is completely or partially exposed below the pressing ring mechanism. And the pressing ring mechanism is driven by the sleeve to expand and retract along the taper part. In the using process, the sealing ring is evenly stressed, the integrity of the sealing ring can be kept to the maximum extent, and then the piston assembling quality is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing ring installation, and particularly relates to an installation device for a piston sealing ring. Background Art

[0002] With the continuous development and progress of hydraulic support jack technology, the sealing requirements for jack pistons are getting higher and higher, and various forms of sealing structures are constantly emerging. With the increasing requirements for materials of hydraulic supports, the materials of sealing rings are also constantly updated. At present, the various frame-type jack piston combination sealing rings processed are all made of imported polyurethane materials. This material has a certain hardness and elasticity. During assembly, the operator manually assembles the sealing ring with a screwdriver. When the sealing ring is stretched to a larger size on one side, the assembly tool is easy to scratch the inner wall of the sealing ring, which is easy to cause damage to the sealing ring and has a certain impact on the sealing performance of the sealing ring. It can be seen that when the sealing ring is manually stretched to a larger size on one side, it is time-consuming and labor-intensive, and the assembly effect is not good.

[0003] The piston of a certain type of hydraulic support jack has a guide groove and a sealing groove, and a polyurethane composite sealing ring is installed in the piston sealing groove. During assembly, the combined sealing ring needs to be stretched 10mm on one side before it can be installed in the sealing groove, and it is assembled manually. The operator uses a manual screwdriver to stretch the sealing ring on one side and slowly put it on the end face of the piston, and then slowly applies a certain force before it can be installed in the groove of the piston seal. During the stretching process, the sealing ring is partially stretched and stressed. Using this method to assemble the sealing ring will cause uneven force, and the sharp part of the screwdriver is easy to scratch the inner wall of the sealing ring, reducing the sealing performance of the sealing ring, and the assembly quality cannot be guaranteed. Manual assembly increases the labor intensity of workers, and the effect is not ideal, which seriously delays the production progress and is not suitable for batch production tasks. Utility Model Content

[0004] Based on the problems existing in the prior art, the purpose of the utility model is to provide a piston sealing ring installation device. The device has a reasonable structure and can evenly expand the inner diameter of the sealing ring, install the sealing ring into the piston sealing groove, reduce the damage of the sealing ring, and increase the service life of the sealing ring. The problem of the sealing ring affecting the sealing performance of the piston is solved, and the quality of assembly is guaranteed.

[0005] The utility model is realized by adopting the following technical solutions:

[0006] A piston sealing ring installation device comprises a sleeve, a pressing ring mechanism, and a conical mandrel; a through hole for installing the conical mandrel is opened inside the sleeve, the pressing ring mechanism is installed at the lower part of the sleeve, the middle of the conical mandrel is a conical part for installing the sealing ring, the conical mandrel passes through the pressing ring mechanism and is installed inside the sleeve, after installation, the conical part is fully or partially exposed under the pressing ring mechanism, and the pressing ring mechanism is driven by the sleeve to open and retract along the conical part.

[0007] When using, first install the sealing ring on the tapered part of the cone spindle, then install the pressing ring mechanism on the lower end of the sleeve, and then install them on the cone spindle together, and then install the piston on the lower end of the cone spindle, and finally press the sleeve to push the sealing ring smoothly into the sealing groove of the piston.

[0008] Further preferably, in order to save materials and prevent the tapered part from being too long, the tapered spindle also includes cylinder a, cylinder b, and cylinder d. The cylinder a, cylinder d, the tapered part, and cylinder b are connected in sequence. The diameter of the cylinder d is equal to the minimum diameter of the tapered part. The cylinder a is installed inside the sleeve through a pressing ring mechanism, and the cylinder b is used to position the piston.

[0009] In order to allow the sealing ring to be smoothly pushed into the sealing groove of the piston by the ring pressing mechanism, the outer diameter of the upper part of the piston is equal to the maximum diameter of the tapered part, to prevent the ring pressing mechanism from being stuck by the piston, thereby blocking the sealing ring from moving downward. The diameter of the cylinder d is equal to the minimum diameter of the tapered part, the diameter of the cylinder d is not greater than the diameter of the sealing ring, and the connecting rod is rotatably connected to the lower end of the sleeve.

[0010] Further preferably, the pressing ring mechanism includes four connecting rods and four pressing sleeves, and the lower ends of the connecting rods and the pressing sleeves are fixedly connected together.

[0011] Further preferably, a through hole a for the passage of bolts is provided at the upper end of the connecting rod, and a pair of short arms for installing the connecting rod extend from the front, back, left and right sides of the lower end of the sleeve, and a through hole b for the passage of bolts is provided on the short arms, and the connecting rod is installed in the middle of the pair of short arms by bolts, and the pressing sleeve is a fan-shaped block, and four pressing sleeves are combined together to form a circular ring shape.

[0012] Further preferably, in order to prevent the press sleeve from being stuck by the tapered part of the conical mandrel, the inner diameter of the circular ring formed by the four press sleeves is not less than the minimum diameter of the tapered part of the conical mandrel, and the press sleeve can be opened and closed by gravity during operation, so that the press sleeve is always in close contact with the conical mandrel.

[0013] Further preferably, in order to improve the working efficiency of the device, a base is further included, the base includes a bottom plate and a cylinder c, the cylinder c is fixed on the bottom plate, the cylinder c has an external thread, and the piston is installed on the external thread. When used, multiple bottom plates are fixed on the installation platform, and after the device installs a piston, the next piston can be installed by directly lifting it up.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model can make the piston sealing ring be evenly expanded, reduce the damage of the sealing ring, save the installation time of the piston sealing ring, improve the production efficiency, ensure the production progress, and reduce the labor cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 The utility model is represented by a three-dimensional structural schematic diagram.

[0018] Figure 2 A schematic diagram of a sleeve is shown.

[0019] Figure 3 Schematic diagram of the cone spindle.

[0020] In the figure: 1-sleeve, 101-short arm, 102-through hole b, 2-connecting rod, 3-pressing sleeve, 4-conical spindle, 401-cylinder a, 402-cylinder d, 403-tapered part, 404-cylinder b, 5-piston, 6-base, 7-sealing ring, 8-bolt, 9-nut. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the scheme of the utility model will be further described below. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] The specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0025] A piston seal ring installation device includes a sleeve 1, a ring pressing mechanism, a cone spindle 4, a piston 5, and a seal ring 7; a through hole for installing the cone spindle 4 is provided inside the sleeve 1, the ring pressing mechanism is installed at the lower part of the sleeve 1, the cone spindle 4 also includes a cylinder a401, a cylinder b404, and a cylinder d402, the cylinder a401, the cylinder d402, the tapered portion 403, and the cylinder b404 are connected in sequence, the diameter of the cylinder d402 is equal to the minimum diameter of the tapered portion 403, the cylinder a401 passes through the ring pressing mechanism and is installed inside the sleeve 1, the cylinder b404 is used to position the piston, and the outer diameter of the upper part of the piston 5 is equal to the maximum diameter of the tapered portion 403. The diameter of the cylinder d402 is equal to the minimum diameter of the tapered portion 403, and the diameter of the cylinder d402 is not greater than the diameter of the seal ring 7.

[0026] During the use of the utility model, the tapered portion 403 plays the role of fixing and expanding the combined sealing ring 7, and the expanded sealing ring 7 is smoothly installed into the sealing groove of the piston 5. After the utility model is installed, the tapered portion 403 is fully or partially exposed below the pressing ring mechanism, and the pressing ring mechanism is driven by the sleeve 1 to open and retract along the tapered portion 403.

[0027] The pressing ring mechanism includes four connecting rods 2 and four pressing sleeves 3. The lower ends of the connecting rods 2 and the pressing sleeves 3 are fixedly connected together. The connecting rods 2 can be welded on the pressing sleeves 3. The upper ends of the connecting rods 2 are provided with through holes a for the bolts 8 to pass through. A pair of short arms 101 for installing the connecting rods 2 are extended from the front, back, left, and right sides of the lower end of the sleeve 1. The short arms 101 are provided with through holes b102 for the bolts 8 to pass through. The connecting rods 2 are installed in the middle of the pair of short arms 101 through the bolts 8. The bolts 8 are fixed with nuts 9 after passing through the through holes b102. The pressing sleeves 3 are fan-shaped blocks, and the four pressing sleeves 3 are combined together to form a circular ring shape.

[0028] In order to further enhance the free opening and retraction of the pressing ring mechanism, a more preferred embodiment is as follows: a torsion spring can be installed at the connection between the connecting rod 2 and the sleeve 1. Under normal conditions, due to the action of the torsion spring, the connecting rod 2 and the pressing sleeve 3 are tightly attached to the conical core shaft 4, which can further improve the pushing effect on the sealing ring.

[0029] The inner diameter of the circular ring formed by the four pressing sleeves 3 is not less than the minimum diameter of the tapered portion 403 of the cone spindle 4 .

[0030] This installation device can also be installed on the machine tool spindle for use:

[0031] The machine tool spindle has a chuck, and the sleeve 1 is placed in the chuck of the machine tool spindle and clamped, and the sleeve 1 can move up and down with the machine tool spindle. It also includes a base 6, which includes a bottom plate and a cylinder c, and the cylinder c is fixed on the bottom plate. The bottom plate is connected and fixed to the machine tool workbench through a pressing plate on the machine tool. The cylinder c has an external thread on the outside, and the piston 5 is installed on the external thread.

[0032] The sealing ring 7 is installed at the starting position of the tapered part 403 of the cone spindle 4, the sleeve 1 is sleeved on the cylinder a401 of the cone spindle 4, and the piston 5 is installed on the cylinder b404 of the cone spindle 4.

[0033] When the above embodiment is used, the sealing ring 7 is first coated with lubricating oil and then sleeved on the starting part of the tapered part 403. The sleeve 1 drives the pressing sleeve 3 to move downward and pushes the sealing ring 7 downward. As the pressing sleeve 3 moves downward, the diameter of the tapered part 403 of the cone spindle 4 contacted by the sealing ring 7 becomes larger and larger, and the sealing ring 7 is gradually and evenly expanded until it is installed in the sealing groove of the piston 5. In this process, the sealing ring 7 is evenly stressed and naturally expanded.

[0034] During the use of the utility model, the centers of the sleeve 1, the pressing sleeve 3, the cone spindle 4 and the piston 5 must be in a straight line, the cone spindle 4 can be covered with several sealing rings 7 at a time, and the downward height of the sleeve 1 is controlled to ensure that one sealing ring 7 is installed at a time.

[0035] The processing of the cone mandrel 4 should ensure that the sharp edges are blunted, the sharp corners are rounded, and the roughness is less than 0.8 to prevent scratching the sealing ring 7.

[0036] The above is only a specific implementation of the utility model, which enables those skilled in the art to understand or implement the utility model. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. A piston sealing ring installation device, characterized in that: The invention comprises a sleeve (1), a pressing ring mechanism, and a conical mandrel (4); a through hole for installing the conical mandrel (4) is provided inside the sleeve (1); the pressing ring mechanism is installed at the lower part of the sleeve (1); the middle of the conical mandrel (4) is a conical portion (403) for installing a sealing ring; the conical mandrel (4) passes through the pressing ring mechanism and is installed inside the sleeve (1); after installation, the conical portion (403) is fully or partially exposed below the pressing ring mechanism; the pressing ring mechanism is driven by the sleeve (1) to open and retract along the conical portion (403).

2. The installation device for a piston sealing ring according to claim 1, characterized in that: The conical spindle (4) further comprises a cylinder a (401), a cylinder b (404), and a cylinder d (402); the cylinder a (401), the cylinder d (402), the tapered portion (403), and the cylinder b (404) are connected in sequence; the diameter of the cylinder d (402) is equal to the minimum diameter of the tapered portion (403); the cylinder a (401) is installed inside the sleeve (1) through a pressing ring mechanism; and the cylinder b (404) is used to position the piston.

3. A piston sealing ring installation device according to claim 1 or 2, characterized in that: The pressing ring mechanism comprises four connecting rods (2) and four pressing sleeves (3), the lower ends of the connecting rods (2) and the pressing sleeves (3) are fixedly connected together, and the connecting rods (2) are rotatably connected to the lower end of the sleeve (1).

4. A piston sealing ring installation device according to claim 3, characterized in that: The upper end of the connecting rod (2) is provided with a through hole a for the bolt (8) to pass through, and a pair of short arms (101) for mounting the connecting rod (2) are extended from the lower end of the sleeve (1) at the front, rear, left and right sides, respectively. The short arms (101) are provided with through holes b (102) for the bolt (8) to pass through, and the connecting rod (2) is mounted between the pair of short arms (101) via the bolts (8).

5. The installation device for a piston sealing ring according to claim 3, characterized in that: The pressing sleeve (3) is a fan-shaped block, and four pressing sleeves (3) are combined together to form a circular ring shape.

6. The installation device for a piston sealing ring according to claim 4, characterized in that: The pressing sleeve (3) is a fan-shaped block, and four pressing sleeves (3) are combined together to form a circular ring shape.

7. The installation device for a piston sealing ring according to claim 5, characterized in that: The inner diameter of the circular ring formed by the four pressing sleeves (3) is not less than the minimum diameter of the tapered portion (403) of the cone mandrel (4).

8. The installation device for a piston sealing ring according to claim 6, characterized in that: The inner diameter of the circular ring formed by the four pressing sleeves (3) is not less than the minimum diameter of the tapered portion (403) of the cone mandrel (4).

9. A piston sealing ring installation device according to claim 1 or 2, characterized in that: It also comprises a base (6), the base (6) comprising a bottom plate and a cylinder c, the cylinder c being fixed on the bottom plate, and the cylinder c having an external thread for mounting the piston (5).

10. The installation device for a piston sealing ring according to claim 3, characterized in that: It also comprises a base (6), the base (6) comprising a bottom plate and a cylinder c, the cylinder c being fixed on the bottom plate, and the cylinder c having an external thread for mounting the piston (5).

11. The installation device for a piston sealing ring according to claim 4, characterized in that: It also comprises a base (6), the base (6) comprising a bottom plate and a cylinder c, the cylinder c being fixed on the bottom plate, and the cylinder c having an external thread for mounting the piston (5).

12. The installation device for a piston sealing ring according to claim 7, characterized in that: It also comprises a base (6), the base (6) comprising a bottom plate and a cylinder c, the cylinder c being fixed on the bottom plate, and the cylinder c having an external thread for mounting the piston (5).

13. The installation device for a piston sealing ring according to claim 8, characterized in that: It also comprises a base (6), the base (6) comprising a bottom plate and a cylinder c, the cylinder c being fixed on the bottom plate, and the cylinder c having an external thread for mounting the piston (5).

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