Pin shaft with sealing structure

Abstract

The utility model discloses a hinge pin with a sealing structure, which comprises a hinge pin, a sealing assembly is arranged on the outer surface of the hinge pin, the sealing assembly comprises a support lantern ring, a first sealing gasket, a second sealing gasket and a support sleeve, the support lantern ring, the first sealing gasket, the second sealing gasket and the support sleeve are symmetrical, and the first sealing gasket and the second sealing gasket are arranged in the support lantern ring. A connecting hole is formed in the surface of the supporting sleeve ring, the supporting sleeve is fixedly connected to the side face, facing the supporting sleeve ring, of the first sealing gasket, a fastening bolt corresponding to the connecting hole is arranged on the surface of the first sealing gasket, and a fastening screw hole corresponding to the fastening bolt is formed in the surface of the second sealing gasket. The sealing assembly on the surface of the pin shaft can be conveniently installed, the situation that pushing is needed after installation is avoided, in addition, the o-shaped ring is arranged between the supporting lantern ring and the supporting sleeve, the structural stability of the sealing assembly can be kept, and the supporting sleeve and the supporting lantern ring can be prevented from being abraded when being installed and used.

Description

Technical Field

[0001] The utility model relates to the field of pin shafts, in particular to a pin shaft with a sealing structure. Background Art

[0002] The pin is usually composed of a cylindrical shaft body and a head. The surface of the shaft body is smooth to ensure that it can rotate freely at the connection part. The head generally has a variety of shapes, such as cylindrical head, conical head, flat head, semi-circular head, etc., which are used to prevent the pin from falling off from the connection hole and facilitate installation and disassembly. The existing pin sealing structure is generally fixedly installed on the surface of the pin. When installing with other connecting parts, it is necessary to first put the sealing device on the surface of the pin and then push it to the connection part for sealing. However, this installation method has certain disadvantages during operation: First, in the process of putting the sealing device, since the sealing device is in direct contact with the surface of the pin and a certain external force needs to be applied to push it, it is easy to cause wear on the surface of the pin. The wear on the surface of the pin will not only affect the appearance of the pin, but more importantly, it will reduce the dimensional accuracy and surface quality of the pin, thereby affecting the matching accuracy and connection stability of the pin with other components.

[0003] Secondly, the contact surface of the sealing device is also susceptible to wear during the installation and pushing process. Once the contact surface of the seal is worn, it will affect the sealing effect, resulting in unstable sealing. Unstable sealing may allow dust, moisture, impurities, etc. to enter the connection part, thereby accelerating the wear of the pin and other connecting parts, reducing the reliability and service life of the equipment.

[0004] Therefore, a pin shaft with a sealing structure is proposed. Utility Model Content

[0005] In view of the above problems, the present invention provides a pin shaft with a sealing structure to solve the problems raised in the above background technology.

[0006] The technical solution of the utility model is:

[0007] A pin shaft with a sealing structure includes a pin shaft, and a sealing assembly is provided on the outer surface of the pin shaft. The sealing assembly includes a support ring, a first sealing gasket, a second sealing gasket, and a support sleeve. The support ring, the first sealing gasket, the second sealing gasket, and the support sleeve are all symmetrical. A connecting hole is provided on the surface of the support ring. The support sleeve is fixedly connected to a side of the first sealing gasket facing the support ring. A fastening bolt corresponding to the connecting hole is provided on the surface of the first sealing gasket. A fastening screw hole corresponding to the fastening bolt is provided on the surface of the second sealing gasket. The inner wall of the support sleeve is tightly fitted with the surface of the pin shaft.

[0008] In a further technical solution, an O-ring is provided on the inner wall of the support collar, and fixing grooves are provided on the opposite surfaces of the two support collars, and the O-rings are detachably connected to the inner wall of the fixing groove.

[0009] Through the above technical solution, the first sealing gasket and the second sealing gasket can be first put on the outer surface of the pin shaft, and then the O-rings can be buckled in sections on the inner walls of the two fixing grooves and fixed with sealant. Then the fastening bolts, connecting holes, and fastening screw holes can be aligned and installed.

[0010] In a further technical solution, two upper and lower opposite buckle plates are provided on the same side of the two support rings, the center of the buckle plate corresponds to the intersection of the two support rings, the surface of the buckle plate is provided with a mounting hole, and the ends of the two support rings are provided with positioning holes, and the inner wall of the mounting hole is provided with a positioning bolt threadedly connected to the positioning hole.

[0011] Through the above technical solution, the stability of the support ring when it is located inside can be ensured.

[0012] In a further technical solution, a side surface of the first sealing gasket facing the supporting ring is provided with a snap-on notch corresponding to the buckle piece.

[0013] Through the above technical solution, when installing the support ring on the surface of the pin shaft, first ensure that the first sealing gasket and the second sealing gasket are separated, then the support sleeve on the surface of the first sealing gasket passes through the inner wall of the support ring and fits with the O-ring, and then the first sealing gasket and the second sealing gasket are merged. During the merging process, the buckle and the bayonet are interlocked to ensure the stability of the overall connection.

[0014] In a further technical solution, bearings distributed circumferentially are installed on the surface of the first sealing gasket, the outer surface of the fastening bolt is fixedly connected to the inner wall of the bearing, and an operating groove is opened on the surface of the bearing.

[0015] The above technical solution facilitates the rotation of the fastening bolt and the fastening screw hole.

[0016] In a further technical solution, a fitting surface is provided on the surface of the second sealing gasket, and the surface of the fitting surface is tightly fitted with the end surface of the support sleeve.

[0017] The above technical solution can avoid wear of the second sealing gasket.

[0018] In a further technical solution, the intersection of the two support rings and the intersection of the two first sealing gaskets and the second sealing gasket deviate by 45 degrees.

[0019] Through the above technical solution, the installation stability can be improved when the whole is merged.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] By setting up a symmetrical structure, the sealing component on the pin surface can be easily installed, avoiding the need to push after installation. In addition, an O-ring is set between the support ring and the support sleeve, which not only maintains the structural stability of the sealing component, but also avoids wear of the support sleeve and the support ring during installation and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the assembly structure of the support collar, the first sealing gasket, and the second sealing gasket of the utility model;

[0024] Figure 3 This is a schematic diagram of the installation structure of the support collar of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the first sealing gasket of the utility model.

[0026] Description of reference numerals:

[0027] 1. Pin; 2. Support collar; 3. Connecting hole; 4. First gasket; 5. Second gasket; 6. Support sleeve; 7. Fitting surface; 8. Fastening bolt; 9. Fastening screw hole; 10. Bearing; 11. Operating slot; 12. O-ring; 13. Fixing slot; 14. Buckle; 15. Mounting hole; 16. Positioning hole; 17. Positioning bolt; 18. Bayonet. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] Example:

[0032] See also Figure 1-4 A pin shaft with a sealing structure includes a pin shaft 1. A sealing assembly is provided on the outer surface of the pin shaft 1. The sealing assembly includes a support collar 2, a first sealing gasket 4, a second sealing gasket 5, and a support sleeve 6. The support collar 2, the first sealing gasket 4, the second sealing gasket 5, and the support sleeve 6 are all symmetrical. A connecting hole 3 is provided on the surface of the support collar 2. The support sleeve 6 is fixedly connected to a side of the first sealing gasket 4 facing the support collar 2. A fastening bolt 8 corresponding to the connecting hole 3 is provided on the surface of the first sealing gasket 4. A fastening screw hole 9 corresponding to the fastening bolt 8 is provided on the surface of the second sealing gasket 5. The inner wall of the support sleeve 6 is in close contact with the surface of the pin shaft 1.

[0033] See also Figure 2 and Figure 3 The inner wall of the support ring 2 is provided with an O-ring 12 , and the opposite surfaces of the two support rings 2 are provided with a fixing groove 13 , and the O-ring 12 is detachably connected to the inner wall of the fixing groove 13 .

[0034] The first sealing gasket 4 and the second sealing gasket 5 can be first put on the outer surface of the pin shaft 1, and then the O-ring 12 can be buckled in sections on the inner walls of the two fixing grooves 13 and fixed with sealant. Then, the fastening bolt 8, the connecting hole 3, and the fastening screw hole 9 can be aligned and installed.

[0035] See also Figure 2 and Figure 3 Two upper and lower opposite buckles 14 are provided on the same side of the two supporting rings 2. The center of the buckle 14 corresponds to the intersection of the two supporting rings 2. A mounting hole 15 is provided on the surface of the buckle 14. The ends of the two supporting rings 2 are provided with positioning holes 16. The inner wall of the mounting hole 15 is provided with a positioning bolt 17 threadedly connected to the positioning hole 16.

[0036] The stability of the supporting collar 2 when it is located inside can be ensured.

[0037] See also Figure 2 and Figure 4 A bayonet 18 corresponding to the buckle 14 is formed on a side surface of the first sealing gasket 4 facing the supporting ring 2 .

[0038] When installing the support collar 2 on the surface of the pin shaft 1, first ensure that the first sealing gasket 4 and the second sealing gasket 5 are separated, then the support sleeve 6 on the surface of the first sealing gasket 4 passes through the inner wall of the support collar 2 and fits with the O-ring 12, and then the first sealing gasket 4 and the second sealing gasket 5 are merged. During the merging process, the buckle 14 and the bayonet 18 are buckled together to ensure the stability of the overall connection.

[0039] See also Figure 1 and Figure 2 The surface of the first sealing gasket 4 is installed with circumferentially distributed bearings 10 , the outer surface of the fastening bolt 8 is fixedly connected to the inner wall of the bearing 10 , and the surface of the bearing 10 is provided with an operating groove 11 .

[0040] It is convenient to rotate the fastening bolt 8 to connect with the fastening screw hole 9.

[0041] See also Figure 1 and Figure 2 The surface of the second sealing gasket 5 is provided with a fitting surface 7 , and the surface of the fitting surface 7 is in close contact with the end surface of the supporting sleeve 6 .

[0042] Avoid wearing the second sealing gasket 5 .

[0043] See also Figure 1 and Figure 2 The intersection of the two supporting rings 2 and the intersection of the two first sealing gaskets 4 and the second sealing gasket 5 deviates by 45 degrees.

[0044] When merging the whole, the installation stability can be improved.

[0045] During operation, first, put the first sealing gasket 4 and the second sealing gasket 5 on the outer surface of the pin shaft 1, then buckle the O-ring 12 in sections on the inner walls of the fixing groove 13 on the opposite sides of the two support rings 2, and then put the support ring 2 on the surface of the pin shaft 1, and then use sealant to fix the O-ring 12 and the fixing groove 13. Then, pass the support sleeve 6 on the surface of the first sealing gasket 4 through the inner wall of the support ring 2 to fit with the O-ring 12, and then merge the first sealing gasket 4 and the second sealing gasket 5. During the merging process, use the positioning bolt 17 to pass through the mounting hole 15 on the surface of the buckle 14 and thread it into the positioning hole 16 at the end of the support ring 2 to ensure the stability of the support ring 2 when it is located inside. Finally, buckle the buckle 14 with the bayonet 18. At this time, align the fastening bolt 8, the connecting hole 3, and the fastening screw hole 9, and rotate the bearing 10 through the operating slot 11 to drive the fastening bolt 8 to connect with the fastening screw hole 9.

[0046] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A pin with a sealing structure, comprising a pin (1), characterized in that: The outer surface of the pin shaft (1) is provided with a sealing assembly, and the sealing assembly includes a support ring (2), a first sealing gasket (4), a second sealing gasket (5), and a support sleeve (6). The support ring (2), the first sealing gasket (4), the second sealing gasket (5), and the support sleeve (6) are all symmetrical. A connecting hole (3) is provided on the surface of the support ring (2). The support sleeve (6) is fixedly connected to a side of the first sealing gasket (4) facing the support ring (2). A fastening bolt (8) corresponding to the connecting hole (3) is provided on the surface of the first sealing gasket (4). A fastening screw hole (9) corresponding to the fastening bolt (8) is provided on the surface of the second sealing gasket (5). The inner wall of the support sleeve (6) is tightly fitted with the surface of the pin shaft (1).

2. A pin shaft with a sealing structure according to claim 1, characterized in that: The inner wall of the support collar (2) is provided with an O-ring (12), and the opposite surfaces of the two support collars (2) are provided with a fixing groove (13), and the O-ring (12) is detachably connected to the inner wall of the fixing groove (13).

3. The pin shaft with a sealing structure according to claim 1, characterized in that: Two buckle plates (14) facing each other are provided on the same side of the two support collars (2), the center of the buckle plates (14) corresponds to the intersection of the two support collars (2), a mounting hole (15) is provided on the surface of the buckle plates (14), and a positioning hole (16) is provided at the end of the two support collars (2), and a positioning bolt (17) threadedly connected to the positioning hole (16) is inserted into the inner wall of the mounting hole (15).

4. The pin shaft with a sealing structure according to claim 1, characterized in that: A bayonet (18) corresponding to the buckle (14) is provided on a side surface of the first sealing gasket (4) facing the supporting collar (2).

5. The pin shaft with a sealing structure according to claim 1, characterized in that: The surface of the first sealing gasket (4) is mounted with circumferentially distributed bearings (10), the outer surface of the fastening bolt (8) is fixedly connected to the inner wall of the bearing (10), and the surface of the bearing (10) is provided with an operating groove (11).

6. The pin shaft with a sealing structure according to claim 1, characterized in that: The surface of the second sealing gasket (5) is provided with a fitting surface (7), and the surface of the fitting surface (7) is tightly fitted with the end surface of the support sleeve (6).

7. The pin shaft with a sealing structure according to claim 1, characterized in that: The intersection of the two support collars (2) and the intersection of the two first sealing pads (4) and the second sealing pad (5) deviates by 45 degrees.

Images