Clamping mechanism for stepped sealing ring

Abstract

The utility model relates to the field of the stepped sealing ring industry, in particular to a clamping mechanism for a stepped sealing ring. The technical problems that in the prior art, a conventional clamping mechanism is difficult to achieve convenient installation of a sealing ring, and meanwhile stable clamping of a solid or hollow stepped sealing ring is difficult to achieve through one mechanism are solved. According to the technical scheme, the clamping mechanism for the stepped sealing ring comprises a bearing assembly, a limiting assembly, an outer clamping assembly, a jacking assembly, a pressing assembly and an inner clamping assembly. The outer clamping assembly is arranged at the upper end of the bearing assembly, so that the outer part of the solid step sealing ring can be clamped, the inner clamping assembly is arranged at the lower end of the bearing assembly, so that the inner part of the hollow step sealing ring can be clamped, and the inner part of the hollow step sealing ring can be clamped through the jacking assembly and the pressing assembly. The stepped sealing ring can be stably clamped, meanwhile, the sealing ring can be conveniently installed in a corresponding hole, and the problem is solved.

Description

Technical Field

[0001] The utility model belongs to the field of stepped sealing ring industry, and specifically relates to a clamping mechanism for stepped sealing rings. Background Art

[0002] In the field of stepped sealing ring industry, stepped sealing ring is a specially designed sealing device used to seal rotating shafts or irregular holes in mechanical devices. It is usually composed of multiple concentric rings, and the diameter of each ring gradually increases or decreases to form a stepped structure to adapt to the irregular shape or changes of the sealing surface. Stepped sealing rings can be solid or hollow, depending on their design and application scenarios. In the prior art, the clamping mechanism of conventional stepped sealing rings can often only clamp one type and size of stepped sealing rings, and it is difficult to achieve a solid or hollow step sealing ring through one mechanism. At the same time, the conventional clamping mechanism is not convenient enough when installing the clamped sealing ring into the corresponding hole, and often requires the assistance of other installation mechanisms. Utility Model Content

[0003] In order to overcome the problem that during the use of the step sealing ring, it is difficult for the conventional clamping mechanism to achieve convenient installation of the sealing ring, and it is difficult to achieve stable clamping of the solid or hollow step sealing ring by one mechanism.

[0004] The technical solution of the utility model is: a clamping mechanism for a step sealing ring, comprising a bearing assembly, a limiting assembly, an external clamping assembly, a jacking assembly, a clamping assembly and an internal clamping assembly; a limiting assembly for limiting is arranged inside the bearing assembly; an external clamping assembly for external clamping is arranged at the upper end of the bearing assembly; a jacking assembly for jacking is arranged at the upper end of the bearing assembly; a clamping assembly for clamping is arranged at the lower end of the bearing assembly; and an internal clamping assembly for internal clamping is arranged at the lower end of the bearing assembly.

[0005] Preferably, by arranging a limiting component on the bearing component, the structure of the entire mechanism can be stabilized, and by arranging an external clamping component on the upper end of the bearing component, external clamping of the solid step sealing ring can be achieved, and by arranging an internal clamping component on the lower end of the bearing component, internal clamping of the hollow step sealing ring can be achieved, thereby solving the problem that it is difficult to achieve stable clamping of solid or hollow step sealing rings by one mechanism. By setting up the jacking component and the clamping component, the step sealing ring can be stably clamped while facilitating the installation of the sealing ring into the corresponding hole, thereby solving the problem that it is difficult to achieve convenient installation of the sealing ring by conventional clamping mechanisms.

[0006] Preferably, the bearing assembly includes a first support block, a first slot body, a connecting rod, a rubber sleeve, a second support block and a second slot body; the upper end of the first support block is penetrated by a first slot body evenly distributed about the center of the first support block; the upper end of the second support block is penetrated by a second slot body evenly distributed about the center of the second support block; the first slot body and the second slot body correspond one to one; a connecting rod is movably provided on the inner walls of the first slot body and the second slot body; a rubber sleeve is fixedly connected to the outer wall of one end of the connecting rod away from the center of the first support block; the rubber sleeve is made of rubber material and has good anti-slip and softness, which is convenient for holding or squeezing the connecting rod for operation.

[0007] Preferably, the limit assembly includes a first limit block, a second limit block, a first spring, a third limit block, a fourth limit block, a second spring, a first pressure block, a second pressure block, a third pressure block and a fourth pressure block; the front and rear ends of the connecting rod are fixedly connected with the first limit block, the second limit block and the third limit block symmetrically about the connecting rod; the upper end of the first limit block is fitted with the lower end of the second limit block; the lower end of the second limit block is fitted with the upper end of the first spring; the upper end of the second limit block is fitted with the lower end of the rubber sleeve; the lower end of the third limit block is fitted with the upper end of the rubber sleeve; the upper end of the third limit block is fitted with the lower end of the second support block; the upper end of the connecting rod is fixedly connected with the fourth limit block; the lower end of the fourth limit block is fitted with the upper end of the second support block; the inner wall of the two first troughs close to each other at one end is fixedly connected with the second pressure block; the two A first pressure block is fixedly connected to one end of each connecting rod that is close to each other; the first pressure block corresponds to the second pressure block one by one; a first spring is fixedly connected between the first pressure block and the second pressure block; a third pressure block is fixedly connected to the inner wall of one end of the two second support blocks that are close to each other; a fourth pressure block is fixedly connected to one end of the two connecting rods that are close to each other; the third pressure block and the fourth pressure block correspond one by one; a second spring is fixedly connected between the third pressure block and the fourth pressure block; through the setting of the first limit block, the second limit block, the third limit block and the fourth limit block, the two connecting rods are limited between the first support block and the second support block, and through the setting of the first spring and the second spring, a certain buffer can be provided when the two connecting rods are squeezed toward the middle, and the connecting rods are kept in a tight fit with the inner walls of the first trough body and the second trough body in a normal state, thereby ensuring the stability of the entire clamping mechanism.

[0008] Preferably, the external clamping assembly includes a third support block, a first bolt, a first rubber block and a third groove body; the left and right ends of the second support block are fixedly connected with the third support blocks symmetrically distributed about the center of the second support block; the first bolt is installed with a thread in the screw groove through the upper edge of the left end of the third support block; the first rubber block is threadedly installed at one end of the two first bolts close to each other; the third groove body is provided at one end of the two first rubber blocks close to each other; when the solid stepped sealing ring needs to be clamped, the end of the first rubber block made of rubber is squeezed against the outer wall of the sealing ring by adjusting the first bolt, and the first rubber block is threadedly installed on the first bolt, and the angle of the first rubber block can be rotated to adjust, and the third groove body provided on the first rubber block is easier to fit tightly with the irregular outer wall of the stepped sealing ring, thereby achieving a firm clamping of the solid stepped sealing ring.

[0009] Preferably, the jacking assembly includes a second bolt and a second rubber block; the second bolt is installed in the threaded inner groove through the center position of the upper end of the second support block; the second rubber block is fixedly connected to the upper end of the second bolt; through the arrangement of the second bolt, the upper end of the second rubber block is fitted with the lower end of the clamped solid stepped sealing ring, the second bolt can be adjusted to push the sealing ring into the hole to be sealed, and the elastic third groove body can ensure that the sealing ring is displaced under the condition of stable clamping, thereby solving the problem that conventional sealing ring clamping devices are difficult to achieve convenient installation.

[0010] Preferably, the clamping assembly includes a fourth slot body, a slider, a third bolt, a third rubber block and a fifth limit block; a fourth slot body is provided through the left end of the connecting rod; a slider is movably provided on the inner wall of the fourth slot body; fifth limit blocks are fixedly connected to the left and right ends of the slider; the ends of the two fifth limit blocks close to each other are fitted with the ends of the two connecting rods far away from each other; a third bolt is installed on the inner thread of the screw groove provided through the center position of the upper end of the first support block; a third rubber block is fixedly connected to the lower end of the third bolt; the lower end of the third rubber block is fitted with the upper end of the slider; through the slider movably provided in the fourth slot body, the fifth limit block fixedly connected to the two ends of the sliding slider can be made to fit the lower end of the fifth limit block with the upper end of the clamping sealing ring, and then the third rubber block fixedly connected to the lower end of the third bolt is squeezed with the sealing ring by twisting the third bolt, so as to achieve the compression of the sealing ring, so that the sealing ring can be conveniently inserted into the hole to be installed by holding the two ends of the first support block, thereby solving the problem that the conventional sealing ring clamping device is difficult to achieve convenient installation.

[0011] Preferably, the internal clamping assembly includes a fifth pressure block, a sixth limit block and a third spring; a plurality of one-to-one corresponding fifth pressure blocks are fixedly connected between the two connecting rods; the fifth pressure block is located below the fourth slot body; a third spring is fixedly connected between the two fifth pressure blocks; a sixth limit block symmetrical about the center of the first support block is fixedly connected to the lower edge of the ends of the two connecting rods away from each other; through the setting of the third spring, the connecting rod is squeezed to further compress the third spring, and the lower part of the mechanism is inserted into the central hole of the hollow sealing ring, so that the ends of the two connecting rods away from each other are fitted with the inner wall of the hollow stepped sealing ring, and at this time, the squeezing of the two connecting rods is relaxed, and the third spring will rebound, thereby achieving a firm clamping of the hollow stepped sealing ring from the inside.

[0012] Beneficial effects of the utility model:

[0013] 1. When the solid stepped sealing ring needs to be clamped, the end of the first rubber block made of rubber material is squeezed against the outer wall of the sealing ring by setting the first bolt, and the first rubber block is threadedly installed on the first bolt, and the angle of the first rubber block can be rotated to adjust, and the third groove body opened on the first rubber block is easier to fit tightly with the irregular outer wall of the stepped sealing ring, thereby achieving a stable clamping of the solid stepped sealing ring;

[0014] 2. By setting the third spring, the connecting rod is squeezed to further compress the third spring, and the lower part of the mechanism is inserted into the central hole of the hollow sealing ring, so that the ends of the two connecting rods that are away from each other fit with the inner wall of the hollow stepped sealing ring. At this time, the squeezing of the two connecting rods is relaxed, and the third spring will rebound, thereby realizing a stable clamping of the hollow stepped sealing ring from the inside;

[0015] 3. By setting the second bolt, the second bolt can be adjusted to push the sealing ring into the hole to be sealed, and the elastic third groove body can ensure that the sealing ring is displaced under the condition of stable clamping. Through the slider movably arranged in the fourth groove body, the fifth limit block fixed at both ends of the sliding slider can be used to make the lower end of the fifth limit block fit with the upper end of the clamped sealing ring, and then the third rubber block fixed at the lower end of the third bolt is squeezed with the sealing ring by twisting the third bolt, so as to achieve the compression of the sealing ring, so that the sealing ring can be easily inserted into the hole to be installed by holding the two ends of the first support block, thereby solving the problem that the conventional sealing ring clamping device is difficult to achieve convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a clamping mechanism for a stepped sealing ring of the utility model;

[0017] Figure 2What is shown is a three-dimensional structural schematic diagram of a bearing assembly of a clamping mechanism for a stepped sealing ring of the utility model;

[0018] Figure 3 What is shown is a three-dimensional structural schematic diagram of a position limiting component of a clamping mechanism for a stepped sealing ring of the utility model;

[0019] Figure 4 What is shown is a cross-sectional three-dimensional structural schematic diagram of a position limiting component of a clamping mechanism for a stepped sealing ring of the present invention;

[0020] Figure 5 What is shown is a three-dimensional structural schematic diagram of an outer clamping assembly and a jacking assembly of a clamping mechanism for a stepped sealing ring of the utility model;

[0021] Figure 6 What is shown is a three-dimensional structural schematic diagram of an inner clamping component and a clamping component of a clamping mechanism for a stepped sealing ring of the utility model.

[0022] The markings in the accompanying drawings are: 1-bearing assembly, 101-first support block, 102-first slot body, 103-connecting rod, 104-rubber sleeve, 105-second support block, 106-second slot body, 2-limiting assembly, 201-first limit block, 202-second limit block, 203-first spring, 204-third limit block, 205-fourth limit block, 206-second spring, 207-first pressure block, 208-second pressure block, 209-third pressure block, 210- The fourth pressure block, 3-external clamping assembly, 301-third support block, 302-first bolt, 303-first rubber block, 304-third trough body, 4-jacking assembly, 401-second bolt, 402-second rubber block, 5-clamping assembly, 501-fourth trough body, 502-slider, 503-third bolt, 504-third rubber block, 505-fifth limit block, 6-inner clamping assembly, 601-fifth pressure block, 602-sixth limit block, 603-third spring. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figure 1The utility model provides an embodiment: a clamping mechanism for a step sealing ring, comprising a bearing component 1, a limiting component 2, an external clamping component 3, a jacking component 4, a clamping component 5 and an internal clamping component 6; a limiting component 2 for limiting is arranged inside the bearing component 1; an external clamping component 3 for external clamping is arranged at the upper end of the bearing component 1; a jacking component 4 for jacking is arranged at the upper end of the bearing component 1; a clamping component 5 for clamping is arranged at the lower end of the bearing component 1; an internal clamping component 6 for internal clamping is arranged at the lower end of the bearing component 1.

[0025] See also Figure 2 In this embodiment, the bearing assembly 1 includes a first support block 101, a first slot body 102, a connecting rod 103, a rubber sleeve 104, a second support block 105 and a second slot body 106; the upper end of the first support block 101 is penetrated by a first slot body 102 evenly distributed about the center of the first support block 101; the upper end of the second support block 105 is penetrated by a second slot body 106 evenly distributed about the center of the second support block 105; the first slot body 102 and the second slot body 106 correspond to each other one by one; the inner walls of the first slot body 102 and the second slot body 106 are movably provided with a connecting rod 103; the outer wall of one end of the connecting rod 103 away from the center of the first support block 101 is fixedly connected to a rubber sleeve 104.

[0026] See also Figure 3 and 4In this embodiment, the limiting assembly 2 includes a first limiting block 201, a second limiting block 202, a first spring 203, a third limiting block 204, a fourth limiting block 205, a second spring 206, a first pressure block 207, a second pressure block 208, a third pressure block 209 and a fourth pressure block 210; the front and rear ends of the connecting rod 103 are fixedly connected with the first limiting block 201, the second limiting block 202 and the third limiting block 204 symmetrically about the connecting rod 103; the upper end of the first limiting block 201 is fitted with the lower end of the second limiting block 202; the lower end of the second limiting block 202 is fitted with the upper end of the first spring 203; the upper end of the second limiting block 202 is fitted with the lower end of the rubber sleeve 104; the lower end of the third limiting block 204 is fitted with the upper end of the rubber sleeve 104; the upper end of the third limiting block 204 is fitted with the second The lower ends of the support blocks 105 fit together; the upper end of the connecting rod 103 is fixedly connected to a fourth limit block 205; the lower end of the fourth limit block 205 fits together with the upper end of the second support block 105; the inner wall of the two first trough bodies 102 close to each other at one end is fixedly connected to a second pressure block 208; the two connecting rods 103 close to each other at one end are fixedly connected to a first pressure block 207; the first pressure block 207 corresponds to the second pressure block 208 one-to-one; a first spring 203 is fixedly connected between the first pressure block 207 and the second pressure block 208; the inner wall of the two second support blocks 105 close to each other at one end is fixedly connected to a third pressure block 209; the end of the two connecting rods 103 close to each other is fixedly connected to a fourth pressure block 210; the third pressure block 209 corresponds to the fourth pressure block 210 one-to-one; a second spring 206 is fixedly connected between the third pressure block 209 and the fourth pressure block 210.

[0027] See also Figure 5 In this embodiment, the outer clamping assembly 3 includes a third support block 301, a first bolt 302, a first rubber block 303 and a third groove body 304; the left and right ends of the second support block 105 are fixedly connected with the third support blocks 301 symmetrically distributed about the center of the second support block 105; the first bolt 302 is installed in the inner thread of the screw groove through the upper edge of the left end of the third support block 301; the first rubber block 303 is threadedly installed at one end of the two first bolts 302 close to each other; the third groove body 304 is opened at one end of the two first rubber blocks 303 close to each other; the jacking assembly 4 includes a second bolt 401 and a second rubber block 402; the second bolt 401 is installed in the inner thread of the screw groove through the center position of the upper end of the second support block 105; the upper end of the second bolt 401 is fixedly connected to the second rubber block 402.

[0028] See also Figure 6In this embodiment, the clamping assembly 5 includes a fourth slot 501, a slider 502, a third bolt 503, a third rubber block 504 and a fifth limit block 505; the left end of the connecting rod 103 is penetrated by a fourth slot 501; the inner wall of the fourth slot 501 is movably provided with a slider 502; the left and right ends of the slider 502 are fixedly connected with fifth limit blocks 505; the ends of the two fifth limit blocks 505 that are close to each other are in contact with the ends of the two connecting rods 103 that are far away from each other; the inner thread of the screw groove that is penetrated by the center position of the upper end of the first support block 101 is installed with the third bolt 503; the The lower end of the three bolts 503 is fixedly connected to a third rubber block 504; the lower end of the third rubber block 504 is fitted with the upper end of the slider 502; the inner clamping assembly 6 includes a fifth pressure block 601, a sixth limit block 602 and a third spring 603; a plurality of one-to-one corresponding fifth pressure blocks 601 are fixedly connected between the two connecting rods 103; the fifth pressure block 601 is located below the fourth slot 501; the third spring 603 is fixedly connected between the two fifth pressure blocks 601; the sixth limit block 602 symmetrical about the center of the first support block 101 is fixedly connected to the lower edge of one end of the two connecting rods 103 away from each other.

[0029] During operation, if the installed sealing ring is a solid step sealing ring, first place the lower end of the sealing ring on the upper end of the second rubber block 402, and adjust the first bolt 302 to squeeze the first rubber block 303 against the outer wall of the sealing ring, so that the third groove 304 fits the stepped end face of the sealing ring, thereby achieving a stable clamping of the solid sealing ring. When the sealing ring needs to be installed, align the upper end of the sealing ring with the corresponding hole by holding the connecting rod 103, and adjust the second bolt 401. Since the first rubber block 303 is made of rubber, the sealing ring can be detached from the clamping of the first rubber block 303 by pushing the second rubber block 402, and then pushed into the installation hole to complete the installation of the solid step sealing ring.

[0030] If the installed sealing ring is a hollow stepped sealing ring, first squeeze the two connecting rods 103 by hand to compress the first spring 203, the second spring 206 and the third spring 603, and bring the two connecting rods 103 closer to each other, pass the connecting rod 103 through the interior of the hollow stepped sealing ring, so that the upper end of the sixth limit block 602 fits with the lower end of the sealing ring, and then release the squeezing of the connecting rod 103, the third spring 603 will rebound, and then squeeze the connecting rod 103 so that the ends of the two connecting rods 103 that are away from each other fit with the inner wall of the sealing ring, and then push the fifth limit block 505 in the fourth limit block 506. The fifth limit block 505 slides in the groove body 501 to make the lower end of the fifth limit block 505 fit with the upper end of the sealing ring, and then the third bolt 503 is adjusted to make the third rubber block 504 squeeze the upper end of the slider 502, so that the fifth limit block 505 is pressed against the upper end of the sealing ring, thereby achieving a firm clamping of the sealing ring from the inside. When the sealing ring needs to be installed, the lower end of the sealing ring is squeezed into the corresponding installation hole by holding the connecting rod 103, and then the third spring 603 is further compressed by squeezing the connecting rod 103 until the mechanism can be taken out from the inside of the sealing ring, thereby achieving the installation of the hollow step sealing ring.

[0031] Through the above steps, by setting a limiting component 2 on the bearing component 1, the structure of the entire mechanism can be stabilized, by setting an external clamping component 3 at the upper end of the bearing component 1, external clamping of the solid step sealing ring can be achieved, and by setting an internal clamping component 6 at the lower end of the bearing component 1, internal clamping of the hollow step sealing ring can be achieved, which solves the problem that it is difficult to achieve stable clamping of solid or hollow step sealing rings by one mechanism. By setting the jacking component 4 and the clamping component 5, the step sealing ring can be stably clamped while facilitating the installation of the sealing ring into the corresponding hole, which solves the problem that it is difficult to achieve convenient installation of the sealing ring by conventional clamping mechanisms.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A clamping mechanism for a stepped sealing ring, comprising a bearing assembly (1); characterized in that: The bearing assembly (1) further comprises a limit assembly (2), an external clamping assembly (3), a jacking assembly (4), a pressing assembly (5) and an internal clamping assembly (6); a limit assembly (2) for limiting is arranged inside the bearing assembly (1); an external clamping assembly (3) for external clamping is arranged at the upper end of the bearing assembly (1); a jacking assembly (4) for jacking is arranged at the upper end of the bearing assembly (1); a pressing assembly (5) for pressing is arranged at the lower end of the bearing assembly (1); and an internal clamping assembly (6) for internal clamping is arranged at the lower end of the bearing assembly (1).

2. A clamping mechanism for a stepped sealing ring according to claim 1, characterized in that: The bearing assembly (1) comprises a first support block (101), a first slot body (102), a connecting rod (103), a rubber sleeve (104), a second support block (105) and a second slot body (106); the upper end of the first support block (101) is penetrated by a first slot body (102) evenly distributed about the center of the first support block (101); the upper end of the second support block (105) is penetrated by a second slot body (106) evenly distributed about the center of the second support block (105); the first slot body (102) and the second slot body (106) correspond to each other one by one; the inner walls of the first slot body (102) and the second slot body (106) are movably provided with connecting rods (103); and the outer wall of one end of the connecting rod (103) away from the center of the first support block (101) is fixedly connected to the rubber sleeve (104).

3. A clamping mechanism for a stepped sealing ring according to claim 1, characterized in that: The limiting assembly (2) comprises a first limiting block (201), a second limiting block (202), a first spring (203), a third limiting block (204), a fourth limiting block (205), a second spring (206), a first pressing block (207), a second pressing block (208), a third pressing block (209) and a fourth pressing block (210); the first limiting block (201), the second limiting block (202) and the fourth limiting block (210) are fixedly connected to the front and rear ends of the connecting rod (103) symmetrically with respect to the connecting rod (103). The first limiting block (201) and the third limiting block (204) are respectively provided with a first limiting block (202) and a second limiting block (204); the upper end of the first limiting block (201) is fitted with the lower end of the second limiting block (202); the lower end of the second limiting block (202) is fitted with the upper end of the first spring (203); the upper end of the second limiting block (202) is fitted with the lower end of the rubber sleeve (104); the lower end of the third limiting block (204) is fitted with the upper end of the rubber sleeve (104); the upper end of the third limiting block (204) is fitted with the second support The lower ends of the blocks (105) are fitted together; the upper end of the connecting rod (103) is fixedly connected to a fourth limiting block (205); the lower end of the fourth limiting block (205) is fitted together with the upper end of the second supporting block (105); the inner wall of one end of the two first trough bodies (102) close to each other is fixedly connected to a second pressing block (208); the one end of the two connecting rods (103) close to each other is fixedly connected to a first pressing block (207); the first pressing block (207) corresponds to the second pressing block (208) one-to-one; A first spring (203) is fixedly connected between the first pressure block (207) and the second pressure block (208); a third pressure block (209) is fixedly connected to the inner wall of one end of the two second support blocks (105) close to each other; a fourth pressure block (210) is fixedly connected to one end of the two connecting rods (103) close to each other; the third pressure block (209) and the fourth pressure block (210) correspond one to one; and a second spring (206) is fixedly connected between the third pressure block (209) and the fourth pressure block (210).

4. A clamping mechanism for a stepped sealing ring according to claim 2, characterized in that: The outer clamping assembly (3) comprises a third support block (301), a first bolt (302), a first rubber block (303) and a third groove body (304); the left and right ends of the second support block (105) are fixedly connected to the third support blocks (301) which are symmetrically distributed about the center of the second support block (105); the first bolt (302) is threadedly installed in a screw groove provided through the upper edge of the left end of the third support block (301); the first rubber block (303) is threadedly installed at one end of the two first bolts (302) close to each other; and the third groove body (304) is provided at one end of the two first rubber blocks (303) close to each other.

5. A clamping mechanism for a stepped sealing ring according to claim 2, characterized in that: The jacking assembly (4) comprises a second bolt (401) and a second rubber block (402); the second bolt (401) is installed in the inner thread of a screw groove extending through the center of the upper end of the second support block (105); and the second rubber block (402) is fixedly connected to the upper end of the second bolt (401).

6. A clamping mechanism for a stepped sealing ring according to claim 2, characterized in that: The clamping assembly (5) comprises a fourth slot body (501), a slider (502), a third bolt (503), a third rubber block (504) and a fifth stopper (505); the fourth slot body (501) is penetrated through the left end of the connecting rod (103); the slider (502) is movably disposed on the inner wall of the fourth slot body (501); the fifth stopper (505) is fixedly connected to the left and right ends of the slider (502); the ends of the two fifth stopper blocks (505) that are close to each other are fitted with the ends of the two connecting rods (103) that are away from each other; the third bolt (503) is installed in the inner thread of the screw groove penetrated through the center position of the upper end of the first supporting block (101); the third rubber block (504) is fixedly connected to the lower end of the third bolt (503); the lower end of the third rubber block (504) is fitted with the upper end of the slider (502).

7. A clamping mechanism for a stepped sealing ring according to claim 2, characterized in that: The inner clamping assembly (6) comprises a fifth pressure block (601), a sixth limit block (602) and a third spring (603); a plurality of fifth pressure blocks (601) corresponding to each other are fixedly connected between the two connecting rods (103); the fifth pressure block (601) is located below the fourth slot body (501); a third spring (603) is fixedly connected between the two fifth pressure blocks (601); and a sixth limit block (602) is fixedly connected to the lower edge of one end of the two connecting rods (103) away from each other and is symmetrical about the center of the first support block (101).

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