Workpiece shaft front end cover oil-proof sealing structure

Abstract

This utility model relates to the field of oil-proof sealing technology, specifically to an oil-proof sealing structure for a workpiece shaft front end cover. It includes a cylinder, an installation mechanism, an oil supply nozzle, and an auxiliary mechanism. The auxiliary mechanism includes a front end cover, a rear end cover, a workpiece shaft body, a sealing seat, a first sealing element, a skeleton-type sealing ring body, a threaded ring, a guide slide, a threaded column, and a limiting device. When disassembling the skeleton-type sealing ring body, first remove the sealing seat connecting bolts. Then, install four screws in the threaded holes of the guide slide and rotate the corresponding screws diagonally in sequence. This will push the sealing seat out of the front end cover and separate it. After the connecting parts on the end of the workpiece shaft body are disassembled, the entire structure of the sealing seat and the skeleton-type sealing ring body can be directly slidably removed from the workpiece shaft body, greatly reducing damage to the surface of the workpiece shaft body. This ensures that the workpiece shaft body is not damaged when removing the skeleton-type sealing ring, thus guaranteeing the oil-proof stability after the sealing ring is replaced.

Description

Technical Field

[0001] This utility model relates to the field of oil-proof sealing technology, and in particular to an oil-proof sealing structure for the front end cover of a workpiece shaft. Background Technology

[0002] Oil prevention of the front end cover of the workpiece shaft is mostly achieved by the combination of O-ring seal and skeleton seal. The O-ring is set in the inner cavity of the fixed seat where the skeleton seal is installed and is sleeved on the outside of the workpiece shaft. The skeleton seal is set in the stepped cavity of the fixed seat, so that when the workpiece shaft is driven by hydraulic oil to move back and forth in the cylinder, it can perform good oil leakage prevention.

[0003] However, most existing skeleton-type sealing rings are installed directly in the stepped groove of the end cover and then limited by snap rings. However, because the side of the skeleton-type sealing ring away from the opening is a hard flat structure, it is necessary to use a flathead screwdriver to knock and damage the skeleton-type sealing ring before prying it out. However, the flathead screwdriver is prone to slipping when knocking, which causes it to impact the outer end face of the workpiece shaft and even scratch its surface. When it is used with a newly replaced sealing ring, it is easy to damage the sealing ring, and the stability of oil leakage prevention is significantly reduced. Utility Model Content

[0004] The purpose of this utility model is to provide an oil-proof sealing structure for the front end cover of a workpiece shaft, which aims to prevent damage to the workpiece shaft body when removing the skeleton-type sealing ring, and to ensure the oil-proof stability after the sealing ring is replaced.

[0005] To achieve the above objectives, this utility model provides an oil-proof sealing structure for the front end cover of a workpiece shaft, including a cylinder body, on which an installation mechanism and an oil supply nozzle are provided, and also includes an auxiliary mechanism;

[0006] The auxiliary mechanism includes a front cover, a rear cover, a workpiece shaft body, a sealing seat, a first sealing element, a skeleton-type sealing ring body, a threaded ring, a guide slide, a threaded post, and a limiting device. The front cover is detachably installed on the front side of the cylinder body, and the rear cover is detachably installed on the rear side of the cylinder body. The workpiece shaft body has a T-shaped structure and is slidably connected to the cylinder body. The sealing seat is detachably connected to the front cover and the first sealing element is provided between it and the workpiece shaft body. The skeleton-type sealing ring body is detachably connected to the sealing seat and is rotatably connected to the workpiece shaft body. The threaded ring is threadedly connected to the sealing seat and, after installation, abuts against the skeleton-type sealing ring body. The four guide slides are integrally formed with the sealing seat and are spaced 90° apart from each other. The guide slides are slidably connected to the front cover and are provided with four through threaded holes at 90° angles to each other. The threaded post is integrally formed with the sealing seat and four are evenly spaced in a ring. The limiting device is located on one side of the threaded post.

[0007] The mounting mechanism includes a first mounting part and a second mounting part, which are integrally formed with the cylinder body and disposed on the front side of the cylinder body, and are respectively provided with through mounting holes.

[0008] The limiting device includes a limiting nut and a retaining ring. The limiting nut is threadedly connected to the threaded post and abuts against the threaded coil. The retaining ring is mounted on the threaded post and abuts against the limiting nut.

[0009] A second sealing element is provided between the front end cover and the cylinder body, and the second sealing element is slidably connected to the cylinder body.

[0010] The bottom of the sealing seat is also provided with a third sealing element, which is attached to the bottom end face of the stepped inner cavity of the front cover.

[0011] This utility model discloses an oil-proof sealing structure for a workpiece shaft front end cover. The workpiece shaft body and the sealing seat are initially sealed by a first sealing element. Then, a skeleton-type sealing ring body further seals the seal, preventing oil leakage. The skeleton-type sealing ring body is limited by a threaded ring. To disassemble the skeleton-type sealing ring body, first remove the connecting bolts of the sealing seat. Then, install four screws in the threaded holes of the guide slide and rotate the corresponding screws diagonally in sequence. This will push the sealing seat out of the front end cover and separate it. After removing the connecting parts at the end of the workpiece shaft body, the entire structure of the sealing seat and the skeleton-type sealing ring body can be directly slidably removed from the workpiece shaft body, greatly reducing damage to the surface of the workpiece shaft body. This ensures that the workpiece shaft body is not damaged when removing the skeleton-type sealing ring, thus guaranteeing the oil-proof stability after the sealing ring is replaced. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0013] Figure 1 This is a schematic diagram of the overall structure of the oil-proof sealing structure of the workpiece shaft front end cover of this utility model.

[0014] Figure 2 This is a schematic diagram of the sealing seat of this utility model.

[0015] Figure 3 This is the utility model Figure 2 Enlarged view of point A in the middle.

[0016] Figure 4 This is a schematic diagram of the structure of the second sealing element of this utility model.

[0017] Figure 5 This is a structural schematic diagram of the third sealing element of this utility model.

[0018] In the diagram: 101-Cylinder body, 102-Oil supply nozzle, 103-Front end cover, 104-Rear end cover, 105-Workpiece shaft body, 106-Sealing seat, 107-First seal, 108-Skeleton-type sealing ring body, 109-Threaded ring, 110-Guide slide, 111-Threaded column, 112-First mounting part, 113-Second mounting part, 114-Limit nut, 115-Snap ring, 116-Second seal, 117-Third seal. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] like Figures 1 to 5 As shown, where Figure 1 This is a schematic diagram of the overall structure of the oil-proof sealing structure of the workpiece shaft front end cover. Figure 2 This is a schematic diagram of the sealing seat. Figure 3 yes Figure 2 Enlarged view of point A in the middle. Figure 4 This is a structural schematic diagram of the second seal. Figure 5 This is a structural schematic diagram of the third sealing element. This utility model provides an oil-proof sealing structure for a workpiece shaft front end cover: it includes a cylinder body 101, an installation mechanism, an oil supply nozzle 102, and an auxiliary mechanism. The auxiliary mechanism includes a front end cover 103, a rear end cover 104, a workpiece shaft body 105, a sealing seat 106, a first sealing element 107, a skeleton-type sealing ring body 108, a threaded ring 109, a guide slide 110, a threaded column 111, and a limiting device. The installation mechanism includes a first mounting part 112 and a second mounting part 113. The limiting device includes a limiting nut 114 and a retaining ring 115. This solution ensures that the workpiece shaft body is not damaged when removing the skeleton-type sealing ring, thus guaranteeing the oil-proof stability after the sealing ring is replaced. It is understood that the aforementioned solution can guarantee the oil-proof stability after the sealing ring is replaced.

[0021] In this embodiment, the cylinder body 101 is provided with a mounting mechanism and an oil supply nozzle 102. The mounting mechanism facilitates the fixing of the cylinder body 101, and the oil supply nozzle 102 facilitates connection with an external hydraulic oil pipe to supply oil. The structure of the cylinder body 101 and the workpiece shaft body 105 is similar to the structure of the hydraulic cylinder and piston rod in the prior art, which facilitates the extension and retraction of the workpiece shaft body 105.

[0022] The front end cover 103 is detachably installed on the front side of the cylinder body 101, and the rear end cover 104 is detachably installed on the rear side of the cylinder body 101. The workpiece shaft body 105 has a T-shaped structure and is slidably connected to the cylinder body 101. The sealing seat 106 is detachably connected to the front end cover 103 and a first sealing element 107 is provided between it and the workpiece shaft body 105. The skeleton-type sealing ring body 108 is detachably connected to the sealing seat 106 and rotatably connected to the workpiece shaft body 105. The threaded ring 109 is threadedly connected to the sealing seat 106, and after installation, it abuts against the skeleton-type sealing ring body 108. The four guide slides 110 are integrally formed with the sealing seat 106 and are set at 90° intervals. The guide slides 110 are slidably connected with the front end cover 103 and are provided with four through threaded holes at 90° intervals. The threaded post 111 is integrally formed with the sealing seat 106 and is set in a ring with four evenly spaced intervals. The limiting device is set on one side of the threaded post 111. Both the front end cover 103 and the rear end cover 104 are T-shaped structures, and each has a mounting groove on the outer surface of the end that slides into the cylinder body 101. The second sealing element 116 is installed in the mounting groove for sealing during installation. The second sealing element 116 is an O-ring structure. The sealing seat 106 is fixedly connected to the front end cover 103 by bolts, and four guide slides 110 at 90° angles are provided on the outer side. The guide slides 110 are provided with through threaded holes to facilitate the installation of screws of appropriate lengths. The sealing seat 106 has a stepped cavity to facilitate the installation of the skeleton-type sealing ring body 108. After installation, it is limited by the threaded ring 109. The threaded post 111 has a stepped structure and is integrally set on the sealing seat 106. After setting, it does not interfere with the installation and disassembly of the threaded ring 109 and the skeleton-type sealing ring body 108. A T-shaped wear-resistant sleeve is installed in the cavity at the bottom of the front end cover 103 to guide and support the sliding fit of the workpiece shaft body 105. The limiting device is used to prevent the threaded ring 109 from loosening. The first sealing element 107 is an O-ring, which is directly installed in the inner hole of the sealing seat 106 and slides with the workpiece shaft body 105 to achieve a sealing fit.

[0023] Secondly, the first mounting part 112 and the second mounting part 113 are integrally formed with the cylinder body 101 and are disposed on the front side of the cylinder body 101, and are respectively provided with through mounting holes. The first mounting part 112 and the second mounting part 113 can be fixed by positioning pins and bolts, respectively, which facilitates the positioning and fixing of the cylinder body 101.

[0024] Then, the limiting nut 114 is threadedly connected to the threaded post 111 and abuts against the threaded ring 109; the retaining spring 115 is installed on the threaded post 111 and abuts against the limiting nut 114. The limiting nut 114 is directly installed on the top of the threaded post 111. After installation, a portion of it will abut against the threaded ring 109 for limiting. Then, the retaining spring 115 is directly installed in the retaining groove on the top of the threaded post 111 to further limit the limiting nut 114. This structure can ensure that the skeleton-type sealing ring body 108 is stably located within the sealing seat 106.

[0025] Furthermore, a second sealing element 116 is provided between the front end cover 103 and the cylinder body 101, and the second sealing element 116 is slidably connected to the cylinder body 101. The second sealing element 116 is an O-ring, which is fitted onto the front end cover 103 and slides into the mounting groove on the outer side of the end of the cylinder body 101 during installation, and is slidably connected to the inner wall of the cylinder body 101.

[0026] Finally, a third sealing element 117 is also provided at the bottom of the sealing seat 106, and the third sealing element 117 is attached to the bottom end face of the stepped inner cavity of the front end cover 103. An annular groove is provided at the bottom of the sealing seat 106, which can be an O-ring or a sealing ring, and is used to seal the sealing seat 106 during installation.

[0027] When using this invention to remove the skeleton-type sealing ring without damaging the workpiece shaft body and to ensure oil-proof stability after the sealing ring is replaced, the workpiece shaft body 105 and the sealing seat 106 are initially sealed by the first sealing element 107. Then, the skeleton-type sealing ring body 108 further seals with the workpiece shaft body 105 to prevent oil leakage. The skeleton-type sealing ring body 108 is limited by the threaded ring 109. When disassembling the skeleton-type sealing ring body 108, first remove the connecting bolts of the sealing seat 106 and remove the multiple retaining rings. 115 and the limiting nut 114 are installed, and then the four screws are installed in the threaded holes of the guide slide 110. By rotating the corresponding screws diagonally in sequence, the sealing seat 106 can be pushed out of the front end cover 103 and separated. After the connecting piece on the end of the workpiece shaft body 105 is disassembled, the overall structure of the sealing seat 106 and the skeleton sealing ring body 108 can be directly slidably removed from the workpiece shaft body 105, which greatly reduces the damage to the surface of the workpiece shaft body 105. Thus, the workpiece shaft body will not be damaged when the skeleton sealing ring is removed, which helps to ensure the oil resistance stability after the sealing ring is replaced.

[0028] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. An oil-proof sealing structure for a workpiece shaft front end cover, comprising a cylinder body, wherein the cylinder body is provided with an installation mechanism and an oil supply nozzle, characterized in that: It also includes auxiliary mechanisms; The auxiliary mechanism includes a front cover, a rear cover, a workpiece shaft body, a sealing seat, a first sealing element, a skeleton-type sealing ring body, a threaded ring, a guide slide, a threaded post, and a limiting device. The front cover is detachably installed on the front side of the cylinder body, and the rear cover is detachably installed on the rear side of the cylinder body. The workpiece shaft body has a T-shaped structure and is slidably connected to the cylinder body. The sealing seat is detachably connected to the front cover and the first sealing element is provided between it and the workpiece shaft body. The skeleton-type sealing ring body is detachably connected to the sealing seat and is rotatably connected to the workpiece shaft body. The threaded ring is threadedly connected to the sealing seat and, after installation, abuts against the skeleton-type sealing ring body. The four guide slides are integrally formed with the sealing seat and are spaced 90° apart from each other. The guide slides are slidably connected to the front cover and are provided with four through threaded holes at 90° angles to each other. The threaded post is integrally formed with the sealing seat and four are evenly spaced in a ring. The limiting device is located on one side of the threaded post.

2. The oil-proof sealing structure for the front end cover of the workpiece shaft as described in claim 1, characterized in that: The mounting mechanism includes a first mounting part and a second mounting part, which are integrally formed with the cylinder body and disposed on the front side of the cylinder body, and are respectively provided with through mounting holes.

3. The oil-proof sealing structure for the front end cover of the workpiece shaft as described in claim 1, characterized in that: The limiting device includes a limiting nut and a retaining ring. The limiting nut is threadedly connected to the threaded post and abuts against the threaded coil. The retaining ring is mounted on the threaded post and abuts against the limiting nut.

4. The oil-proof sealing structure for the front end cover of the workpiece shaft as described in claim 1, characterized in that: A second sealing element is provided between the front end cover and the cylinder body, and the second sealing element is slidably connected to the cylinder body.

5. The oil-proof sealing structure for the front end cover of the workpiece shaft as described in claim 1, characterized in that... : The bottom of the sealing seat is also provided with a third sealing element, which is attached to the bottom end face of the stepped inner cavity of the front cover.

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