Oil leakage prevention structure

Abstract

The utility model discloses an oil leakage prevention structure, which belongs to the technical field of flange seats and comprises a seat body and a seat cover. The seat body at least comprises an oil leakage boss, and the oil leakage boss is provided with a three-stage stepped hole communicated with the left end face and the right end face of the oil leakage boss; the three-stage stepped hole comprises a first-stage stepped hole, a second-stage stepped hole and a third-stage stepped hole which are sequentially formed from left to right; an oil seal is matched in the third-stage stepped hole; the oil leakage boss is further provided with a first oil leakage hole and a second oil leakage hole. The second-stage stepped hole communicates with the left end face of the oil leakage boss through the first oil leakage hole. The third-stage stepped hole is communicated with the outer wall of the left end of the oil leakage boss through the second oil leakage hole; the seat cover is detachably mounted on the right side of the seat body; the device further comprises a placing cavity; a transmission shaft moving horizontally is arranged in the containing cavity in a matched mode. According to the utility model, the internal lubricating oil can be completely and quickly discharged, the situation that the lubricating oil leaks and pollutes a product is avoided, and the product cleaning frequency and the labor cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of flange seats, and in particular relates to an oil leakage prevention structure. Background Art

[0002] In general mechanical packaging work, the drive shaft will move in the flange seat. In order to reduce the friction between the drive shaft and the flange seat, lubricating oil is generally added between the flange seat and the drive shaft to increase the service life of the flange and the drive shaft.

[0003] However, the movement of the transmission shaft will drive the movement of the lubricating oil, causing the lubricating oil to leak from the flange seat. After the lubricating oil leaks, it will drip onto the products being produced, causing the products to be contaminated. Not only does it require daily cleaning to ensure the cleanliness of the production equipment, which is very troublesome, but it will also cause product quality problems.

[0004] The utility model patent with application number CN201721149994.9 discloses an anti-leakage structure for the output shaft end of the reducer. The patent sets the oil seal on the rightmost side of the seat cover, and uses the oil return hole and the oil return channel to return the oil entering the positioning sleeve to the box body to prevent oil leakage. However, the patent has only one oil return channel, which is long and has a small outlet. Not only is the oil discharge speed slow, but it may also cause the lubricating oil to partially accumulate inside the oil return channel and the positioning sleeve; and the oil seal of the patent is set on the bottom surface of the right side of the seat cover. Once the contact pressure of the lip shaft of the oil seal decreases, the interference between the oil seal and the shaft diameter will be too small after installation, which will easily cause the lubricating oil to flow through the inner hole of the seat cover and leak from the right side of the seat cover. Therefore, there is an urgent need to provide an anti-leakage structure that can solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-leakage oil structure to solve the above-mentioned shortcomings, and to solve the problem that the lubricating oil is difficult to be quickly and completely discharged from the flange seat, and the lubricating oil is easy to leak from the seat cover of the flange seat. To achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0006] 14. The oil-leakage prevention structure of claim 13, wherein the oil-leakage prevention structure comprises a seat body and a seat cover; the seat body comprises at least an oil leakage boss, the oil leakage boss is provided with a three-step hole connecting the left end face and the right end face of the oil leakage boss; the three-step hole comprises a first step hole, a second step hole and a third step hole which are arranged in sequence from left to right; the aperture of the first step hole is smaller than that of the second step hole; the aperture of the second step hole is smaller than that of the third step hole; an oil seal is fitted in the third step hole; a first oil leakage hole and a second oil leakage hole are also provided on the oil leakage boss; the first oil leakage hole connects the second step hole with the left end face of the oil leakage boss; the second oil leakage hole connects the third step hole with the outer wall of the left end of the oil leakage boss; the seat cover is detachably mounted on the right side of the seat body; the seat cover is also provided with a mounting through hole; the mounting through hole cooperates with the three-step hole to form a placement cavity; a transmission shaft for horizontal movement is fitted in the placement cavity.

[0007] Furthermore, the mounting through hole is a two-level stepped hole, and includes a first-level mounted stepped hole and a second-level mounted stepped hole; the aperture of the first-level mounted stepped hole is larger than that of the second-level mounted stepped hole; a plurality of oil seal positioning bosses protruding to the left are provided on the right side surface of the first-level mounted stepped hole; the seat cover forms a first annular mounting inner side wall corresponding to the position of the first-level mounted stepped hole by opening a mounting through hole inside; an O-ring is also provided on the seat cover; the O-ring is installed between the first annular mounting inner side wall and the side wall of the oil seal positioning boss close to the first annular mounting inner side wall.

[0008] Furthermore, the oil leakage boss forms a first annular inner wall corresponding to the position of the first step hole by opening three step holes inside; the first oil leakage hole is obliquely arranged between the outer wall of the oil leakage boss and the first annular inner wall, and the first oil leakage hole gradually inclines from left to right towards the direction approaching the first annular inner wall.

[0009] Furthermore, an arc-shaped oil groove is transversely arranged on the first annular inner side wall; the arc-shaped oil groove is recessed toward the outer wall of the oil leakage boss.

[0010] Furthermore, the oil leakage boss is provided with three-stepped holes inside to form a second annular inner wall corresponding to the position of the second-stepped holes; a first arc-shaped guide groove is provided on the second annular inner wall opposite to the first oil leakage hole; and the first arc-shaped guide groove is recessed in a direction close to the outer wall of the oil leakage boss.

[0011] Furthermore, the second oil leakage hole is vertically arranged between the outer side wall of the oil leakage boss and the three-step hole, and a notch is formed on the outer side wall of the oil leakage boss through the second oil leakage hole.

[0012] Furthermore, the oil leakage boss is provided with three-step holes inside to form a third annular inner wall corresponding to the positions of the three-step holes; a second arc-shaped guide groove is provided on the third annular inner wall opposite to the second oil leakage hole; and the second arc-shaped guide groove is recessed in a direction close to the outer wall of the oil leakage boss.

[0013] Furthermore, it also includes a vent hole; the vent hole connects the first-level stepped hole with the left end surface of the oil leakage boss.

[0014] Furthermore, the seat body also includes a mounting platform; the mounting platform is connected to the outer wall of the oil leakage boss, and the left end of the oil leakage boss exceeds the left end surface of the mounting platform, and the right end of the oil leakage boss exceeds the right end surface of the mounting platform; an annular groove recessed to the right is provided on the left end surface of the mounting platform; the annular groove is arranged around the outer wall of the oil leakage boss, and a second sealing ring is fitted in the annular groove.

[0015] Furthermore, two first fixing holes are provided on the mounting platform, and the two first fixing holes are symmetrically arranged on the upper and lower sides of the oil leakage boss; two second fixing holes are symmetrically arranged on the upper and lower sides of the seat cover, and the second fixing holes penetrate the left end surface and the right end surface of the seat cover; the two second fixing holes correspond one-to-one to the two first fixing holes.

[0016] The beneficial effects of the utility model are:

[0017] 1. The utility model reserves sufficient accommodation space for lubricating oil by arranging three-level stepped holes with increasing apertures from left to right on the oil leakage boss, and by arranging the first oil leakage hole and the second oil leakage hole, the lubricating oil at different positions inside the three-level stepped holes can be completely discharged from the left end surface of the oil leakage boss, thereby preventing the lubricating oil brought out by the moving shaft during operation from leaking from the right side of the seat cover and contaminating the product, ensuring the cleanliness and hygiene of the production environment, thereby reducing the frequency of cleaning the product and the labor cost of cleaning.

[0018] 2. The utility model allows the lubricating oil inside the seat body to be quickly discharged through the first oil leakage hole arranged obliquely and the second oil leakage hole with a notch formed on the outer side wall of the oil leakage boss, and does not cause a large amount of lubricating oil to accumulate inside the seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the utility model after the seat body and the seat cover are connected, and the second sealing ring is installed in the annular groove;

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model after the seat body and the seat cover are connected, and the second sealing ring is not installed in the annular groove;

[0021] Figure 3 It is one of the three-dimensional structural schematic diagrams of the seat body of the utility model;

[0022] Figure 4 This is the second schematic diagram of the three-dimensional structure of the seat body of the utility model;

[0023] Figure 5 It is a cross-sectional view of the seat body of the utility model;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the seat cover of the utility model;

[0025] In the accompanying drawings: 1-seat body, 2-seat cover, 3-first oil leakage hole, 4-second oil leakage hole, 5-arc oil groove, 6-vent, 7-second sealing ring, 8-first fixing hole, 9-second fixing hole, 11-oil leakage boss, 12-oil seal, 13-mounting platform, 21-mounting through hole, 22-O-ring, 23-oil seal positioning boss, 31-first arc guide groove, 41-second arc guide groove, 11a-first step hole, 11b-second step hole, 11c-third step hole, 131-annular groove, 21a-first step hole, 21b-second step hole. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0027] Embodiment 1:

[0028] See attached Figures 1 to 6An oil leakage prevention structure, comprising a seat body 1 and a seat cover 2; the seat body 1 at least comprises an oil leakage boss 11, the oil leakage boss 11 is provided with a three-level stepped hole connecting the left end face and the right end face of the oil leakage boss 11; the three-level stepped hole comprises a first-level stepped hole 11a, a second-level stepped hole 11b and a third-level stepped hole 11c arranged in sequence from left to right; the aperture of the first-level stepped hole 11a is smaller than that of the second-level stepped hole 11b; the aperture of the second-level stepped hole 11b is smaller than that of the third-level stepped hole 11c; the third-level stepped hole 11 c is matched with an oil seal 12; the oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4; the first oil leakage hole 3 connects the second step hole 11b with the left end face of the oil leakage boss 11; the second oil leakage hole 4 connects the third step hole 11c with the outer wall of the left end of the oil leakage boss 11; the seat cover 2 is detachably mounted on the right side of the seat body 1; the seat cover 2 is also provided with a mounting through hole 21; the mounting through hole 21 cooperates with the three-step hole to form a placement cavity; the placement cavity is matched with a transmission shaft for horizontal movement. It can be seen from the above structure that the seat body 1 is used to form a complete flange seat after being connected with the seat cover 2. The seat body 1 at least includes an oil leakage boss 11, and the oil leakage boss 11 is provided with a three-step hole connecting the left end face and the right end face of the oil leakage boss 11, and the three-step hole includes a first step hole 11a, a second step hole 11b and a third step hole 11c arranged from left to right. The aperture of the first-stage stepped hole 11a is smaller than that of the second-stage stepped hole 11b; the aperture of the second-stage stepped hole 11b is smaller than that of the third-stage stepped hole 11c. When the transmission shaft is installed on the flange seat, it does not directly contact any of the first-stage stepped hole 11a, the second-stage stepped hole 11b and the third-stage stepped hole 11c. And unlike the common technology of setting the transmission shaft oil seal on the seat cover, the utility model is equipped with an oil seal 12 in the third-stage stepped hole 11c, and the oil seal 12 is used to axially position the transmission shaft and prevent the lubricating oil from leaking to the seat cover 2 installed on the right side of the seat body 1. Since any of the three-level stepped holes is not in direct contact with the transmission shaft, and from left to right, the gap between the first-level stepped hole 11a and the transmission shaft, the gap between the second-level stepped hole 11b and the transmission shaft, and the gap between the third-level stepped hole 11c and the transmission shaft are getting larger and larger, sufficient accommodation space can be reserved for the lubricating oil dripping into different holes, and the accommodation space is larger in the part closer to the oil seal 12, so that the lubricating oil will not enter the seat cover from the right side of the oil seal 12 due to insufficient accommodation space, and then overflow from the right side of the seat cover. The oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4. The first oil leakage hole 3 connects the second-level stepped hole 11b with the left end face of the oil leakage boss 11, so that the lubricating oil falling into the second-level stepped hole 11b flows through the first oil leakage hole 3 and then is discharged from the left end face of the oil leakage boss 11.The second oil leakage hole 4 connects the third-level stepped hole 11c with the outer wall of the left end of the oil leakage boss 11, so as to make the lubricating oil falling into the third-level stepped hole 11c flow through the second oil leakage hole 4 and then be discharged from the left end of the oil leakage boss 11. Specifically, the part where the second oil leakage hole 4 connects with the oil leakage boss 11 can be the end face of the left end of the oil leakage boss 11, can be the part of the side wall of the oil leakage boss 11 located at the left end, or can be the part of the end face of the left end of the oil leakage boss 11 and the part of the side wall of the left end of the oil leakage boss 11. In addition, the seat body 1 is generally connected to an oil tank. When the lubricating oil is discharged from the left end face of the oil leakage boss 11, it can be collected in the oil tank without polluting the external environment. The seat cover 2 is detachably mounted on the right side of the seat body 1, and the seat cover 2 is provided with a mounting through hole 21. The transmission shaft is movably mounted on the flange seat through the placement cavity formed by simultaneously penetrating the three-level stepped hole and the mounting through hole 21. When the transmission shaft is working, it moves horizontally relative to the placement cavity. The utility model reserves sufficient accommodating space for lubricating oil by arranging three-level stepped holes with increasing apertures from left to right, and can make the lubricating oil accumulated in the oil leakage boss 11 be completely discharged from the left end surface of the oil leakage boss 11 by arranging the first oil leakage hole 3 and the second oil leakage hole 4, so as to prevent the lubricating oil brought out by the moving shaft during operation from leaking from the right side of the seat cover 2 and contaminating the product, thereby ensuring the cleanliness and hygiene of the production environment, thereby reducing the frequency of cleaning the product and the labor cost of cleaning.

[0029] Embodiment 2:

[0030] See attached Figures 1 to 6An oil leakage prevention structure, comprising a seat body 1 and a seat cover 2; the seat body 1 at least comprises an oil leakage boss 11, the oil leakage boss 11 is provided with a three-level stepped hole connecting the left end face and the right end face of the oil leakage boss 11; the three-level stepped hole comprises a first-level stepped hole 11a, a second-level stepped hole 11b and a third-level stepped hole 11c arranged in sequence from left to right; the aperture of the first-level stepped hole 11a is smaller than that of the second-level stepped hole 11b; the aperture of the second-level stepped hole 11b is smaller than that of the third-level stepped hole 11c; the third-level stepped hole 11 c is matched with an oil seal 12; the oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4; the first oil leakage hole 3 connects the second step hole 11b with the left end face of the oil leakage boss 11; the second oil leakage hole 4 connects the third step hole 11c with the outer wall of the left end of the oil leakage boss 11; the seat cover 2 is detachably mounted on the right side of the seat body 1; the seat cover 2 is also provided with a mounting through hole 21; the mounting through hole 21 cooperates with the three-step hole to form a placement cavity; the placement cavity is matched with a transmission shaft for horizontal movement. It can be seen from the above structure that the seat body 1 is used to form a complete flange seat after being connected with the seat cover 2. The seat body 1 at least includes an oil leakage boss 11, and the oil leakage boss 11 is provided with a three-step hole connecting the left end face and the right end face of the oil leakage boss 11, and the three-step hole includes a first step hole 11a, a second step hole 11b and a third step hole 11c arranged from left to right. The aperture of the first-stage stepped hole 11a is smaller than that of the second-stage stepped hole 11b; the aperture of the second-stage stepped hole 11b is smaller than that of the third-stage stepped hole 11c. When the transmission shaft is installed on the flange seat, it does not directly contact any of the first-stage stepped hole 11a, the second-stage stepped hole 11b and the third-stage stepped hole 11c. And unlike the common technology of setting the transmission shaft oil seal on the seat cover, the utility model is equipped with an oil seal 12 in the third-stage stepped hole 11c, and the oil seal 12 is used to axially position the transmission shaft and prevent the lubricating oil from leaking to the seat cover 2 installed on the right side of the seat body 1. Since any of the three-level stepped holes is not in direct contact with the transmission shaft, and from left to right, the gap between the first-level stepped hole 11a and the transmission shaft, the gap between the second-level stepped hole 11b and the transmission shaft, and the gap between the third-level stepped hole 11c and the transmission shaft are getting larger and larger, sufficient accommodation space can be reserved for the lubricating oil dripping into different holes, and the accommodation space is larger in the part closer to the oil seal 12, so that the lubricating oil will not enter the seat cover from the right side of the oil seal 12 due to insufficient accommodation space, and then overflow from the right side of the seat cover. The oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4. The first oil leakage hole 3 connects the second-level stepped hole 11b with the left end face of the oil leakage boss 11, so that the lubricating oil falling into the second-level stepped hole 11b flows through the first oil leakage hole 3 and then is discharged from the left end face of the oil leakage boss 11.The second oil leakage hole 4 connects the third-level stepped hole 11c with the outer wall of the left end of the oil leakage boss 11, so as to make the lubricating oil falling into the third-level stepped hole 11c flow through the second oil leakage hole 4 and then be discharged from the left end of the oil leakage boss 11. Specifically, the part where the second oil leakage hole 4 connects with the oil leakage boss 11 can be the end face of the left end of the oil leakage boss 11, can be the part of the side wall of the oil leakage boss 11 located at the left end, or can be the part of the end face of the left end of the oil leakage boss 11 and the part of the side wall of the left end of the oil leakage boss 11. In addition, the seat body 1 is generally connected to an oil tank. When the lubricating oil is discharged from the left end face of the oil leakage boss 11, it can be collected in the oil tank without polluting the external environment. The seat cover 2 is detachably mounted on the right side of the seat body 1, and the seat cover 2 is provided with a mounting through hole 21. The transmission shaft is movably mounted on the flange seat through the placement cavity formed by simultaneously penetrating the three-level stepped hole and the mounting through hole 21. When the transmission shaft is working, it moves horizontally relative to the placement cavity. The utility model reserves sufficient accommodating space for lubricating oil by arranging three-level stepped holes with increasing apertures from left to right, and can make the lubricating oil accumulated in the oil leakage boss 11 be completely discharged from the left end surface of the oil leakage boss 11 by arranging the first oil leakage hole 3 and the second oil leakage hole 4, so as to prevent the lubricating oil brought out by the moving shaft during operation from leaking from the right side of the seat cover 2 and contaminating the product, thereby ensuring the cleanliness and hygiene of the production environment, thereby reducing the frequency of cleaning the product and the labor cost of cleaning.

[0031] The mounting through hole 21 is a two-stage stepped hole, and includes a first-stage mounted stepped hole 21a and a second-stage mounted stepped hole 21b; the aperture of the first-stage mounted stepped hole 21a is larger than that of the second-stage mounted stepped hole 21b; a plurality of oil seal positioning bosses 23 protruding to the left are provided on the right side surface of the first-stage mounted stepped hole 21a; the seat cover 2 forms a first annular mounting inner side wall corresponding to the position of the first-stage mounted stepped hole 21a by opening the mounting through hole 21 inside; an O-ring 22 is also provided on the seat cover 2; the O-ring 22 is installed between the first annular mounting inner side wall and the side wall of the oil seal positioning boss 23 close to the first annular mounting inner side wall. It can be seen from the above structure that the mounting through hole 21 is set as a two-stage stepped hole structure, and the aperture of the first-stage mounting stepped hole 21a is larger than that of the second-stage mounting stepped hole 21b. The right side of the first-stage mounting stepped hole 21a is used as the reference surface for the installation of the oil seal positioning boss 23, so that a plurality of oil seal positioning bosses 23 are evenly arranged on the right side of the first-stage mounting stepped hole 21a along the circumferential direction. A plurality of oil seal positioning bosses 23 are used to limit the oil seal 12 so that the oil seal 12 cannot move left and right. The seat cover 2 also forms a first annular mounting inner side wall corresponding to the position of the first-stage mounting stepped hole 21a by opening the mounting through hole 21 inside, and the O-ring 22 is installed between the first annular mounting inner side wall and the side wall of a plurality of oil seal positioning bosses 23 close to the first annular mounting inner side wall, thereby sealing the right end surface of the seat body 1.

[0032] The oil leakage boss 11 is provided with three-stepped holes inside to form a first annular inner wall corresponding to the position of the first-stepped hole 11a; the first oil leakage hole 3 is obliquely arranged between the outer wall of the oil leakage boss 11 and the first annular inner wall, and the first oil leakage hole 3 is gradually inclined from left to right in a direction close to the first annular inner wall. It can be seen from the above structure that the first oil leakage hole 3 is obliquely arranged between the outer wall of the oil leakage boss 11 and the first annular inner wall, and the first oil leakage hole 3 is gradually inclined from left to right in a direction close to the first annular inner wall. When the seat body 1 is installed, the first oil leakage hole 3 will be located below the rotating shaft, and the lubricating oil can be quickly discharged along the first oil leakage hole 3 which is gradually inclined downward from right to left, and will not accumulate inside the second-stepped hole 11b. Specifically, the first oil leakage hole 3 can be set as a round hole or a waist-shaped hole.

[0033] The first annular inner sidewall is also laterally provided with an arcuate oil groove 5 which is recessed toward the outer wall of the oil leakage boss 11. As can be seen from the above structure, the arcuate oil groove 5 is used to guide the lubricating oil on the first annular inner sidewall to the left end face of the oil leakage boss 11 and discharge it.

[0034] The oil leakage boss 11 is provided with three-stepped holes inside to form a second annular inner side wall corresponding to the position of the second stepped hole 11b; the second annular inner side wall is provided with a first arc-shaped guide groove 31 at a position directly opposite to the first oil leakage hole 3; the first arc-shaped guide groove 31 is recessed toward the outer wall of the oil leakage boss 11. As can be seen from the above structure, the first arc-shaped guide groove 31 is used to guide the lubricating oil to the first oil leakage hole 3. Since the first oil leakage hole 3 is located below the transmission shaft, the lubricating oil on the second annular inner side wall will gather in the first arc-shaped guide groove 31 due to gravity, and then the lubricating oil will be guided to the first oil leakage hole 3 through the first arc-shaped guide groove 31, and then discharged from the first oil leakage hole 3.

[0035] Embodiment three:

[0036] See attached Figures 1 to 6An oil leakage prevention structure, comprising a seat body 1 and a seat cover 2; the seat body 1 at least comprises an oil leakage boss 11, the oil leakage boss 11 is provided with a three-level stepped hole connecting the left end face and the right end face of the oil leakage boss 11; the three-level stepped hole comprises a first-level stepped hole 11a, a second-level stepped hole 11b and a third-level stepped hole 11c arranged in sequence from left to right; the aperture of the first-level stepped hole 11a is smaller than that of the second-level stepped hole 11b; the aperture of the second-level stepped hole 11b is smaller than that of the third-level stepped hole 11c; the third-level stepped hole 11 c is matched with an oil seal 12; the oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4; the first oil leakage hole 3 connects the second step hole 11b with the left end face of the oil leakage boss 11; the second oil leakage hole 4 connects the third step hole 11c with the outer wall of the left end of the oil leakage boss 11; the seat cover 2 is detachably mounted on the right side of the seat body 1; the seat cover 2 is also provided with a mounting through hole 21; the mounting through hole 21 cooperates with the three-step hole to form a placement cavity; the placement cavity is matched with a transmission shaft for horizontal movement. It can be seen from the above structure that the seat body 1 is used to form a complete flange seat after being connected with the seat cover 2. The seat body 1 at least includes an oil leakage boss 11, and the oil leakage boss 11 is provided with a three-step hole connecting the left end face and the right end face of the oil leakage boss 11, and the three-step hole includes a first step hole 11a, a second step hole 11b and a third step hole 11c arranged from left to right. The aperture of the first-stage stepped hole 11a is smaller than that of the second-stage stepped hole 11b; the aperture of the second-stage stepped hole 11b is smaller than that of the third-stage stepped hole 11c. When the transmission shaft is installed on the flange seat, it does not directly contact any of the first-stage stepped hole 11a, the second-stage stepped hole 11b and the third-stage stepped hole 11c. And unlike the common technology of setting the transmission shaft oil seal on the seat cover, the utility model is equipped with an oil seal 12 in the third-stage stepped hole 11c, and the oil seal 12 is used to axially position the transmission shaft and prevent the lubricating oil from leaking to the seat cover 2 installed on the right side of the seat body 1. Since any of the three-level stepped holes is not in direct contact with the transmission shaft, and from left to right, the gap between the first-level stepped hole 11a and the transmission shaft, the gap between the second-level stepped hole 11b and the transmission shaft, and the gap between the third-level stepped hole 11c and the transmission shaft are getting larger and larger, sufficient accommodation space can be reserved for the lubricating oil dripping into different holes, and the accommodation space is larger in the part closer to the oil seal 12, so that the lubricating oil will not enter the seat cover from the right side of the oil seal 12 due to insufficient accommodation space, and then overflow from the right side of the seat cover. The oil leakage boss 11 is also provided with a first oil leakage hole 3 and a second oil leakage hole 4. The first oil leakage hole 3 connects the second-level stepped hole 11b with the left end face of the oil leakage boss 11, so that the lubricating oil falling into the second-level stepped hole 11b flows through the first oil leakage hole 3 and then is discharged from the left end face of the oil leakage boss 11.The second oil leakage hole 4 connects the third-level stepped hole 11c with the outer wall of the left end of the oil leakage boss 11, so as to make the lubricating oil falling into the third-level stepped hole 11c flow through the second oil leakage hole 4 and then be discharged from the left end of the oil leakage boss 11. Specifically, the part where the second oil leakage hole 4 connects with the oil leakage boss 11 can be the end face of the left end of the oil leakage boss 11, can be the part of the side wall of the oil leakage boss 11 located at the left end, or can be the part of the end face of the left end of the oil leakage boss 11 and the part of the side wall of the left end of the oil leakage boss 11. In addition, the seat body 1 is generally connected to an oil tank. When the lubricating oil is discharged from the left end face of the oil leakage boss 11, it can be collected in the oil tank without polluting the external environment. The seat cover 2 is detachably mounted on the right side of the seat body 1, and the seat cover 2 is provided with a mounting through hole 21. The transmission shaft is movably mounted on the flange seat through the placement cavity formed by simultaneously penetrating the three-level stepped hole and the mounting through hole 21. When the transmission shaft is working, it moves horizontally relative to the placement cavity. The utility model reserves sufficient accommodating space for lubricating oil by arranging three-level stepped holes with increasing apertures from left to right, and can make the lubricating oil accumulated in the oil leakage boss 11 be completely discharged from the left end surface of the oil leakage boss 11 by arranging the first oil leakage hole 3 and the second oil leakage hole 4, so as to prevent the lubricating oil brought out by the moving shaft during operation from leaking from the right side of the seat cover 2 and contaminating the product, thereby ensuring the cleanliness and hygiene of the production environment, thereby reducing the frequency of cleaning the product and the labor cost of cleaning.

[0037] The second oil leakage hole 4 is vertically arranged between the outer wall of the oil leakage boss 11 and the three-stage stepped hole, and a notch is formed on the outer wall of the oil leakage boss 11 through the second oil leakage hole 4. It can be seen from the above structure that the second oil leakage hole 4 is vertically arranged between the outer wall of the oil leakage boss 11 and the three-stage stepped hole structure, and is also located below the transmission shaft. And the end of the second oil leakage hole 4 away from the seat cover 2 is connected to the left end wall and the outer wall of the oil leakage boss 11, so that a notch is formed on the outer wall of the oil leakage boss 11. The notch is larger than the oil discharge outlet formed by an ordinary hole, which is convenient for the lubricating oil in the third-stage stepped hole 11c to pass through the second oil leakage hole 4 and then be quickly discharged from the notch.

[0038] The oil leakage boss 11 is provided with three-stepped holes inside to form a third annular inner side wall corresponding to the position of the three-stepped holes; the third annular inner side wall is provided with a second arc-shaped guide groove 41 at a position directly opposite to the second oil leakage hole 4; the second arc-shaped guide groove 41 is recessed toward the outer wall of the oil leakage boss 11. As can be seen from the above structure, the second arc-shaped guide groove 41 is used to guide the lubricating oil to the second oil leakage hole 4. Since the second oil leakage hole 4 is also located below the transmission shaft, the lubricating oil on the third annular inner side wall will gather in the second arc-shaped guide groove 41 due to gravity, and then the second arc-shaped guide groove 41 will guide the lubricating oil to the second oil leakage hole 4, and then quickly discharge it from the gap.

[0039] The vent hole 6 is also included, which connects the first-stage stepped hole 11a with the left end surface of the oil leakage boss 11. As can be seen from the above structure, the vent hole 6 connects the first-stage stepped hole 11a with the left end surface of the oil leakage boss 11, so that the air pressure inside the oil leakage boss 11 is consistent with the outside, ensuring smooth oil leakage.

[0040] The seat body 1 also includes a mounting platform 13; the mounting platform 13 is connected to the outer wall of the oil leakage boss 11, and the left end of the oil leakage boss 11 exceeds the left end surface of the mounting platform 13, and the right end of the oil leakage boss 11 exceeds the right end surface of the mounting platform 13; an annular groove 131 recessed to the right is provided on the left end surface of the mounting platform 13; the annular groove 131 is arranged around the outer wall of the oil leakage boss 11, and a second sealing ring 7 is matched in the annular groove 131. It can be seen from the above structure that the mounting platform 13 is a platform for assisting the mounting of the seat body 1 and the seat cover 2, the mounting platform 13 is fixedly connected to the outer wall of the oil leakage boss 11 or is designed as an integrated whole, an annular groove 131 recessed to the right is provided on the left end surface of the mounting platform 13, and a second sealing ring 7 is matched in the annular groove 131, which further improves the sealing effect of the seat body 1 and the external components.

[0041] The mounting platform 13 is also provided with two first fixing holes 8, which are symmetrically arranged on the upper and lower sides of the oil leakage boss 11; the seat cover 2 is symmetrically provided with two second fixing holes 9 on the upper and lower sides, which penetrate the left end surface and the right end surface of the seat cover 2; the two second fixing holes 9 correspond to the two first fixing holes 8 one by one. It can be seen from the above structure that the first fixing holes 8 and the second fixing holes 9 are provided to cooperate with the external connecting piece to fix the seat body 1 and the seat cover 2.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An oil leakage prevention structure, characterized in that: The invention comprises a seat body (1) and a seat cover (2); the seat body (1) comprises at least an oil leakage boss (11); the oil leakage boss (11) is provided with a three-level stepped hole connecting the left end face and the right end face of the oil leakage boss (11); the three-level stepped hole comprises a first-level stepped hole (11a), a second-level stepped hole (11b) and a third-level stepped hole (11c) arranged in sequence from left to right; the aperture of the first-level stepped hole (11a) is smaller than that of the second-level stepped hole (11b); the aperture of the second-level stepped hole (11b) is smaller than that of the third-level stepped hole (11c); the third-level stepped hole (11c) is provided with a An oil seal (12); the oil leakage boss (11) is also provided with a first oil leakage hole (3) and a second oil leakage hole (4); the first oil leakage hole (3) connects the second step hole (11b) with the left end face of the oil leakage boss (11); the second oil leakage hole (4) connects the third step hole (11c) with the outer wall of the left end of the oil leakage boss (11); the seat cover (2) is detachably mounted on the right side of the seat body (1); the seat cover (2) is also provided with a mounting through hole (21); the mounting through hole (21) cooperates with the three-step hole to form a placement cavity; a transmission shaft that moves horizontally is matched in the placement cavity.

2. An oil leakage prevention structure according to claim 1, characterized in that: The mounting through hole (21) is a two-stage stepped hole, and comprises a first-stage mounting stepped hole (21a) and a second-stage mounting stepped hole (21b); the aperture of the first-stage mounting stepped hole (21a) is larger than that of the second-stage mounting stepped hole (21b); a plurality of oil seal positioning bosses (23) protruding to the left are provided on the right side surface of the first-stage mounting stepped hole (21a); ​​the seat cover (2) is provided with a mounting through hole (21) inside to form a first annular mounting inner side wall corresponding to the position of the first-stage mounting stepped hole (21a); ​​an O-ring (22) is also provided on the seat cover (2); the O-ring (22) is installed between the first annular mounting inner side wall and the side wall of the oil seal positioning boss (23) close to the first annular mounting inner side wall.

3. The oil leakage prevention structure according to claim 1, characterized in that: The oil leakage boss (11) is provided with three-stepped holes inside to form a first annular inner wall corresponding to the position of the first-stepped hole (11a); the first oil leakage hole (3) is arranged obliquely between the outer wall of the oil leakage boss (11) and the first annular inner wall, and the first oil leakage hole (3) is gradually inclined from left to right in a direction close to the first annular inner wall.

4. An oil leakage prevention structure according to claim 3, characterized in that: An arc-shaped oil groove (5) is also transversely arranged on the first annular inner side wall; the arc-shaped oil groove (5) is recessed in a direction close to the outer wall of the oil leakage boss (11).

5. An oil leakage prevention structure according to claim 1 or 3, characterized in that: The oil leakage boss (11) is provided with three-stepped holes inside to form a second annular inner wall corresponding to the position of the second-stepped hole (11b); a first arc-shaped guide groove (31) is provided at a position of the second annular inner wall directly opposite to the first oil leakage hole (3); and the first arc-shaped guide groove (31) is recessed in a direction close to the outer wall of the oil leakage boss (11).

6. The oil leakage prevention structure according to claim 1, characterized in that: The second oil leakage hole (4) is vertically arranged between the outer wall of the oil leakage boss (11) and the three-step hole, and a notch is formed on the outer wall of the oil leakage boss (11) through the second oil leakage hole (4).

7. An oil leakage prevention structure according to claim 1 or 6, characterized in that: The oil leakage boss (11) is provided with three-stepped holes inside to form a third annular inner wall corresponding to the positions of the three-stepped holes; a second arc-shaped guide groove (41) is provided on the third annular inner wall directly opposite to the second oil leakage hole (4); and the second arc-shaped guide groove (41) is recessed in a direction close to the outer wall of the oil leakage boss (11).

8. The oil leakage prevention structure according to claim 1, characterized in that: It also includes a vent hole (6); the vent hole (6) connects the first-stage stepped hole (11a) with the left end surface of the oil leakage boss (11).

9. The oil leakage prevention structure according to claim 1, characterized in that: The seat body (1) further comprises a mounting platform (13); the mounting platform (13) is connected to the outer side wall of the oil leakage boss (11), and the left end of the oil leakage boss (11) exceeds the left end surface of the mounting platform (13), and the right end of the oil leakage boss (11) exceeds the right end surface of the mounting platform (13); an annular groove (131) recessed to the right is formed on the left end surface of the mounting platform (13); the annular groove (131) is arranged around the outer side wall of the oil leakage boss (11), and a second sealing ring (7) is fitted in the annular groove (131).

10. An oil leakage prevention structure according to claim 9, characterized in that: The mounting platform (13) is also provided with two first fixing holes (8), which are symmetrically arranged on the upper and lower sides of the oil leakage boss (11); the seat cover (2) is symmetrically provided with two second fixing holes (9) on the upper and lower sides, which penetrate the left end surface of the seat cover (2) and the right end surface of the seat cover (2); the two second fixing holes (9) correspond one-to-one to the two first fixing holes (8).

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