Large-opening-angle heavy door shaft structure

Abstract

The invention provides a large-opening-angle heavy door shaft structure, and relates to the field of door shafts. Four door frame connecting grooves are formed in the top end face of the door frame connecting plate in a rectangular array shape. The top end face of the door frame connecting plate is fixedly connected with a fixing column. A bearing ball is arranged outside the fixed column; a bearing outer ring is arranged outside the bearing ball body; the upper part of the fixed column is in threaded connection with a fastening nut; the fastening nut is aligned with the position of the bearing ball body; the tail end of the bearing outer ring is fixedly connected with a door body connecting plate through a nut; a plurality of door body connecting grooves are formed in the left part of the door body connecting plate; the bearing outer ring can be driven to rotate around the bearing ball body along with rotation of the bearing ball body, then lubricating oil in the oil storage tank flows out of the oil leakage tank through a series of transmission to automatically lubricate the bearing, and the problems that workers need to lubricate a heavy door shaft structure regularly, operation is tedious, and work efficiency is high are solved. And the labor intensity of workers is high.

Description

Technical Field

[0001] The invention relates to the technical field of door shafts, in particular to a large-opening-angle heavy-duty door shaft structure. Background Art

[0002] In the automated production line of the servo press, there are many walking channel doors of automated trolleys. In order to ensure the smooth rotation of the walking channel doors, a heavy door shaft structure is usually set at the connection of the walking channel doors. The existing heavy door shaft structure is usually composed of a door panel connecting plate, a door body connecting plate and an axle core.

[0003] For example: the invention patent with application number CN202210949254.2 discloses a through-axis armored door with a through-axis linking structure between a door frame and a door face, specifically including a door frame, a connector and a door face, a sleeve 1 is arranged at the left end of the connector, and two sleeves 2 are arranged at the right end in sequence, the corner of the door face is hinged with the sleeve 1, a groove 1 is arranged on the side of the door frame, the right end of the connector can be inserted into the groove 1, two locking mechanisms 1 are arranged at the bottom of the groove 1, and the two stepped shafts are moved upward by rotating the internal thread gears of the two locking mechanisms 1, and the front ends of the two stepped shafts can be respectively inserted into the two sleeves 2 in the groove 1, and a groove 2 connected to the hole 2 is arranged on the door frame, and a rotating wheel is arranged in the groove 2, and the rotating wheel can drive the internal thread gear to rotate. Compared with the traditional installation and fixing method of hinges and screws, the present invention simplifies the installation process, improves the installation efficiency, enhances the strength of the connection structure, and thus prolongs the service life of the armored door.

[0004] However, during the long-term use of the heavy-duty door axis structure, the lubricating oil on the heavy-duty door axis structure will gradually be consumed or lost. At this time, in order to ensure the lubrication effect of the heavy-duty door axis structure, the staff is required to lubricate the heavy-duty door axis structure regularly. The operation is more cumbersome, which increases the labor intensity of the staff and is more inconvenient to use. Summary of the invention

[0005] In view of this, the present invention provides a large-opening-angle heavy-duty door shaft structure, which is provided with a sealing frame and an oil leakage groove which can automatically lubricate during the rotation of the heavy-duty door shaft structure. When the door is opened, the rotation of the door body connecting plate will drive the outer ring of the bearing to rotate around the bearing ball. During the rotation of the outer ring of the bearing, the control shift block will be driven to move. During the movement of the control shift block, the connecting pressure block will be driven to move. As the connecting pressure block moves, the sealing frame will be driven to rotate and the control torsion spring will be screwed. During the rotation of the sealing frame, the oil leakage groove will be staggered and aligned with the position of the first oil outlet. Whenever the oil leakage groove rotates to the position aligned with the first oil outlet, the oil leakage groove will be staggered and aligned with the first oil outlet. When the first oil outlet hole is aligned with the position, the lubricating oil stored in the oil storage tank will flow into the first oil outlet hole through the oil leakage groove, and the lubricating oil flowing into the first oil outlet hole will slowly flow into the second oil outlet hole, and the second oil outlet hole will guide the oil to flow into the connection between the bearing ball and the outer ring of the bearing, so as to automatically lubricate the bearing. When the lubricating oil flows into the second oil outlet hole through the first oil outlet hole, the oil buffer block made of porous material can block the lubricating oil to a certain extent, so as to prevent the lubricating oil from flowing too fast and make the lubricating oil flow out slowly, which not only ensures the lubricating effect of the lubricating oil, but also prolongs the service life of the lubricating oil in the oil storage tank.

[0006] The present invention provides the purpose and efficacy of a large-opening-angle heavy-duty door axis structure, which specifically includes: a door frame connecting plate; the top surface of the door frame connecting plate is provided with four door frame connecting grooves in a rectangular array; a fixing column is fixedly connected to the top surface of the door frame connecting plate; a bearing sphere is arranged on the outside of the fixing column; a bearing outer ring is arranged on the outside of the bearing sphere; a fastening nut is threadedly connected to the upper part of the fixing column; the position of the fastening nut and the bearing sphere are aligned; the end of the bearing outer ring is fastened to a door body connecting plate through a nut; a plurality of door body connecting grooves are arranged on the left part of the door body connecting plate; an oil storage tank is provided on the upper part of the fixing column; a fixing frame is fixedly connected to the center of the upper part of the oil storage tank; a sealing frame is rotatably connected to the lower part of the oil storage tank; a control torsion spring is fixedly connected to the bottom end surface of the sealing frame; the end of the control torsion spring is fixedly connected in the fixing column.

[0007] Furthermore, a group of first installation grooves are opened in the four door frame connecting grooves; a group of first installation sliding blocks are slidably connected in the four groups of first installation grooves; a first sealing baffle is fixedly connected between the four groups of first installation sliding blocks; and the four first sealing baffles are respectively aligned with the four door frame connecting grooves.

[0008] Furthermore, a group of second installation grooves are opened in the multiple door body connecting grooves; a group of second installation slide blocks are slidably connected in the multiple groups of second installation grooves; a second sealing baffle is fixedly connected between the multiple groups of second installation slide blocks; and the multiple second sealing baffles are respectively aligned with the positions of the multiple groups of door body connecting grooves.

[0009] Furthermore, a guide slide rod is slidably connected inside the fixed frame; a sealing block is fixedly connected to the top surface of the guide slide rod; the sealing block is inserted into the top surface of the fixed column; a fixing spring is fixedly connected to the bottom surface of the sealing block; and the end of the fixing spring is fixedly connected to the bottom surface of the fixed frame.

[0010] Furthermore, a connecting pressure block is fixedly connected to the outer side of the bottom end surface of the sealing frame; a control block is fixedly connected to the lower part of the bearing outer ring; the control block is slidably connected in the fixed column; and the control block is aligned with the connecting pressure block.

[0011] Furthermore, the exterior of the fixing column is provided with a plurality of first oil outlet holes in a circular array; the exterior of the bearing sphere is provided with a plurality of second oil outlet holes in a circular array; the plurality of second oil outlet holes are respectively aligned with the positions of the plurality of first oil outlet holes; the exterior of the sealing frame is provided with a plurality of oil leakage grooves in a circular array; the plurality of oil leakage grooves are respectively arranged in an alternating manner with the plurality of first oil outlet holes.

[0012] Furthermore, multiple groups of the first oil outlet holes are fixedly connected with oil buffer blocks; multiple groups of oil buffer blocks are cylindrical structures made of porous materials; the diameters of multiple groups of oil buffer blocks are the same as the diameters of multiple groups of first oil outlet holes; and multiple groups of oil buffer blocks are respectively aligned with the positions of multiple groups of second oil outlet holes.

[0013] Furthermore, the top surface of the door frame connecting plate is slidably connected to a movable slide; the lower part of the movable slide is fixedly connected to a connecting spring; the end of the connecting spring is fixedly connected in the door frame connecting plate; the top surface of the movable slide is fixedly connected to a limit bracket; the limit bracket is aligned with the position of the fastening nut.

[0014] Beneficial Effects

[0015] When the door shaft rotates, the outer ring of the bearing will rotate around the bearing ball as the bearing ball rotates, so that the control block drives the connecting pressure block to move and drives the sealing frame to rotate, so that the oil leakage groove is staggered and aligned with the position of the first oil outlet hole. Whenever the oil leakage groove rotates to a position aligned with the first oil outlet hole, the lubricating oil stored in the oil storage tank will flow into the first oil outlet hole through the oil leakage groove, and flow into the connection between the bearing ball and the outer ring of the bearing through the guidance of the first oil outlet hole and the second oil outlet hole, so as to automatically lubricate the bearing, effectively reduce the friction and wear of the door shaft during operation, reduce the frequency and cost of manual lubrication, make the operation simpler and faster, reduce the labor intensity of the staff, improve the convenience of the large-angle heavy-duty door shaft structure, and make it more convenient to use.

[0016] When the lubricating oil flows into the second oil outlet hole through the first oil outlet hole, the oil buffer block made of porous material can block the lubricating oil to a certain extent, preventing the lubricating oil from flowing too fast and making the lubricating oil flow out slowly, which not only ensures the lubricating effect of the lubricating oil, but also prolongs the use time of the lubricating oil in the oil storage tank, thereby improving the practicability of the large-opening-angle heavy-duty door shaft structure.

[0017] After the fastening nut fixes the bearing ball, the rebound of the connecting spring will drive the movable slide to reset, so that the limit bracket is stuck on the outside of the fastening nut, locking the fastening nut to prevent the fastening nut from loosening, effectively improving the safety of the large-opening-angle heavy-duty door shaft structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is an axonometric structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the axonometric structure of the present invention from a rear view.

[0023] Figure 3 It is a schematic diagram of the axonometric structure of the first sealing baffle of the present invention.

[0024] Figure 4 The present invention Figure 3 A is an enlarged structural diagram of FIG.

[0025] Figure 5 It is a schematic diagram of the axonometric structure of the second sealing baffle of the present invention.

[0026] Figure 6 The present invention Figure 5 Schematic diagram of the enlarged structure at B.

[0027] Figure 7 It is a schematic cross-sectional structural diagram of the fixing column of the present invention.

[0028] Figure 8 It is a schematic diagram of the axonometric structure of the sealing frame of the present invention.

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure of the bearing outer ring of the present invention.

[0030] Reference numerals list

[0031] 1. Door frame connecting plate; 101. Door frame connecting groove; 102. First installation slide groove; 103. First installation slide block; 104. First sealing baffle; 105. Fixed column; 106. Bearing ball; 107. Bearing outer ring; 108. Fastening nut; 109. Moving slide; 110. Connecting spring; 111. Limiting bracket; 112. Door body connecting plate; 113. Door body connecting groove; 114. Second installation slide groove; 115. Second installation slide block; 116. Second sealing baffle; 117. Oil storage tank; 118. Fixed frame; 119. Guide slide rod; 120. Sealing block; 121. Fixed spring; 122. First oil outlet; 123. Oil buffer block; 124. Sealing frame; 125. Oil leakage groove; 126. Connecting pressure block; 127. Control torsion spring; 128. Second oil outlet; 129. Control dial block. DETAILED DESCRIPTION

[0032] Embodiment 1:

[0033] The present invention provides a large opening angle heavy door shaft structure, please refer to Figures 1 to 9 As shown, it includes: a door frame connecting plate 1;

[0034] The top surface of the door frame connecting plate 1 is provided with four door frame connecting grooves 101 in a rectangular array; a fixing column 105 is fixedly connected to the top surface of the door frame connecting plate 1; a bearing sphere 106 is arranged on the outside of the fixing column 105; a bearing outer ring 107 is arranged on the outside of the bearing sphere 106; a fastening nut 108 is threadedly connected to the upper part of the fixing column 105; the fastening nut 108 is aligned with the position of the bearing sphere 106; the end of the bearing outer ring 107 is fastened to a door body connecting plate 112 through a nut; a plurality of door body connecting grooves 113 are provided on the left part of the door body connecting plate 112; an oil storage tank 117 is provided on the upper part of the fixing column 105; a fixing frame 118 is fixedly connected to the center of the upper part of the oil storage tank 117; a sealing frame 124 is rotatably connected to the lower part of the oil storage tank 117; a control torsion spring 127 is fixedly connected to the bottom end surface of the sealing frame 124; the end of the control torsion spring 127 is fixedly connected in the fixing column 105.

[0035] Among them, a group of first installation grooves 102 are opened in each of the four door frame connecting grooves 101; a group of first installation sliders 103 are slidably connected in each of the four groups of first installation grooves 102; a first sealing baffle 104 is fixedly connected between each of the four groups of first installation sliders 103; and the four first sealing baffles 104 are respectively aligned with the four door frame connecting grooves 101.

[0036] Among them, a group of second installation grooves 114 are opened in multiple door body connecting grooves 113; a group of second installation sliders 115 are slidably connected in multiple groups of second installation grooves 114; a second sealing baffle 116 is fixedly connected between multiple groups of second installation sliders 115; and multiple second sealing baffles 116 are respectively aligned with the positions of multiple groups of door body connecting grooves 113.

[0037] Among them, a guide slide rod 119 is slidably connected inside the fixed frame 118; a sealing block 120 is fixedly connected to the top end surface of the guide slide rod 119; the sealing block 120 is inserted into the top end surface of the fixed column 105; a fixed spring 121 is fixedly connected to the bottom end surface of the sealing block 120; the end of the fixed spring 121 is fixedly connected to the bottom end surface of the fixed frame 118.

[0038] Among them, a connecting pressure block 126 is fixedly connected to the outer side of the bottom end surface of the sealing frame 124; a control block 129 is fixedly connected to the lower part of the bearing outer ring 107; the control block 129 is slidably connected in the fixed column 105; the control block 129 is aligned with the connecting pressure block 126.

[0039] Among them, the outside of the fixing column 105 is provided with multiple groups of first oil outlet holes 122 in the shape of an annular array; the outside of the bearing ball 106 is provided with multiple groups of second oil outlet holes 128 in the shape of an annular array; the multiple groups of second oil outlet holes 128 are respectively aligned with the positions of the multiple groups of first oil outlet holes 122; the outside of the sealing frame 124 is provided with multiple groups of oil leakage grooves 125 in the shape of an annular array; the multiple groups of oil leakage grooves 125 are respectively arranged in an alternating manner with the multiple groups of first oil outlet holes 122.

[0040] Among them, multiple groups of first oil outlet holes 122 are all fixedly connected with oil buffer blocks 123; multiple groups of oil buffer blocks 123 are all cylindrical structures made of porous materials; the diameters of multiple groups of oil buffer blocks 123 are the same as the diameters of multiple groups of first oil outlet holes 122; and multiple groups of oil buffer blocks 123 are respectively aligned with the positions of multiple groups of second oil outlet holes 128.

[0041] Specific usage and function of this embodiment: In the present invention, during the installation of the heavy door shaft structure, the bolts are passed through the door frame connecting grooves 101 and the bolts are screwed to fix the door frame connecting plate 1 to the door frame, and then the first sealing baffle 104 is moved to make the first sealing baffle 104 drive the first installation slide block 103 to slide in the first installation slide groove 102, so that the first sealing baffle 104 blocks and seals the bolts fixing the door frame connecting plate 1, and prevents dust, moisture, oil and other external debris from entering the connection of the door frame connecting plate 1, and keeps the connection part of the door frame connecting plate 1 clean and dry, and the bolts are passed through the door body connecting grooves 113 and the bolts are screwed to fix the door body connecting plate 112 to the door frame, and then the first sealing baffle 104 is moved to make the first sealing baffle 104 drive the first installation slide block 103 to slide in the first installation slide groove 102, so that the first sealing baffle 104 blocks and seals the bolts fixing the door frame connecting plate 1, and prevents dust, moisture, oil and other external debris from entering the connection of the door frame connecting plate 1, and keeps the connection part of the door frame connecting plate 1 clean and dry, and then the bolts are passed through the door body connecting grooves 113 and the bolts are screwed to fix the door body connecting plate 112 to the door frame, and then the first sealing baffle 104 is moved to make the first sealing baffle 104 drive the first installation slide block 103 to slide in the first installation slide groove 102, and then the first sealing baffle 104 is moved to make the first sealing baffle 104 block and seal the bolts fixing the door frame connecting plate 1 ... The second sealing baffle 116 drives the second mounting slide block 115 to slide in the second mounting slide groove 114, so that the second sealing baffle 116 blocks and seals the bolts fixing the door body connecting plate 112, and prevents dust, moisture, oil and other external debris from entering the connection of the door body connecting plate 112, so as to keep the connection part of the door body connecting plate 112 clean and dry. By pressing the sealing block 120, the sealing block 120 drives the guide slide bar 119 to slide in the fixing frame 118 and squeeze the fixing spring 121. With the movement of the sealing block 120, a gap connected to the oil storage tank 117 will be exposed on the top surface of the fixing column 105. At this time, the staff can inject the lubricating oil into the oil storage tank 117 for storage. After the lubricating oil is injected, the staff only needs to loosen the sealing block 120 so that the sealing block 120 can be reset under the action of the elastic potential energy of the fixing spring 121 to seal the gap and automatically seal the oil storage tank 117 to ensure the quality of the lubricating oil in the oil storage tank 117. When the door is opened, the rotation of the door body connecting plate 112 will drive the bearing outer ring 107 to rotate around the bearing ball 106. During the rotation of the bearing outer ring 107, the control dial block 129 will be driven to move. During the movement of the control dial block 129, the connecting pressure block 126 will be driven to move. As the connecting pressure block 126 moves, the sealing frame 124 will be driven to rotate and the control torsion spring 127 will be screwed. During the rotation of the sealing frame 124, oil leakage will be prevented. The grooves 125 are staggered and aligned with the first oil outlet hole 122. Whenever the oil leakage grooves 125 rotate to a position aligned with the first oil outlet hole 122, the lubricating oil stored in the oil storage tank 117 will flow into the first oil outlet hole 122 through the oil leakage grooves 125. The lubricating oil flowing into the first oil outlet hole 122 will slowly flow into the second oil outlet hole 128, and the second oil outlet hole 128 will guide the oil to flow into the connection between the bearing ball 106 and the bearing outer ring 107, so as to automatically lubricate the bearing. When the lubricating oil flows into the second oil outlet hole 128 through the first oil outlet hole 122, the oil buffer block 123 made of porous material can block the lubricating oil to a certain extent, so as to prevent the lubricating oil from flowing too fast and make the lubricating oil flow out slowly, thereby ensuring the lubricating effect of the lubricating oil.It can also extend the use time of the lubricating oil in the oil storage tank 117. At the same time, the fisheye bearing composed of the bearing ball 106 and the bearing outer ring 107 can make installation and adjustment simpler and more accurate, thereby eliminating the installation and adjustment difficulties caused by factors such as manufacturing errors of non-standard structural parts and basic deviations of installation and adjustment infrastructure, and can reduce the impact of the friction of the door weight on the door shaft, so that the door can rotate more freely and smoothly.

[0042] Embodiment 2:

[0043] Based on Example 1, please refer to Figures 1 to 5 As shown, it includes: a moving slide 109, a connecting spring 110 and a limiting bracket 111. The top surface of the door frame connecting plate 1 is slidably connected to a moving slide 109; a connecting spring 110 is fixedly connected to the lower part of the moving slide 109; the end of the connecting spring 110 is fixedly connected to the door frame connecting plate 1; the top surface of the moving slide 109 is fixedly connected to a limiting bracket 111; the limiting bracket 111 is aligned with the position of the fastening nut 108

[0044] Specific usage and function of this embodiment: In the present invention, during the installation of the door body connecting plate 112, the movable slide 109 is first moved to make the movable slide 109 slide in the door frame connecting plate 1 and squeeze the connecting spring 110. As the movable slide 109 moves, the limiting bracket 111 will move away from the fixed column 105. Then, the bearing ball 106 is passed through the fixed column 105 and the fastening nut 108 is screwed to the upper part of the fixed column 105 to fix the door frame connecting plate 1. After the fastening nut 108 fixes the bearing ball 106, the movable slide 109 is released to reset the movable slide 109 as the connecting spring 110 rebounds, so that the limiting bracket 111 is stuck on the outside of the fastening nut 108, and the fastening nut 108 is locked to prevent the fastening nut 108 from loosening.

[0045] In this article, there are a few points to note:

[0046] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0047] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0048] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. Large opening angle heavy duty door shaft structure, including: A door frame connecting plate (1); the top surface of the door frame connecting plate (1) is provided with four door frame connecting grooves (101) in a rectangular array; the top surface of the door frame connecting plate (1) is characterized in that a fixing column (105) is fixedly connected to the top surface of the door frame connecting plate (1); a bearing ball (106) is arranged outside the fixing column (105); a bearing outer ring (107) is arranged outside the bearing ball (106); a fastening nut (108) is threadedly connected to the upper part of the fixing column (105); the fastening nut (108) is aligned with the position of the bearing ball (106); the bearing outer ring (107) ) is fastened with a door body connecting plate (112) through a nut; a plurality of door body connecting grooves (113) are provided on the left side of the door body connecting plate (112); an oil storage tank (117) is provided on the upper part of the fixed column (105); a fixing frame (118) is fixedly connected to the center of the upper part of the oil storage tank (117); a sealing frame (124) is rotatably connected to the lower part of the oil storage tank (117); a control torsion spring (127) is fixedly connected to the bottom end surface of the sealing frame (124); the end of the control torsion spring (127) is fixedly connected to the inside of the fixed column (105).

2. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: A group of first installation slide grooves (102) are respectively provided in the four door frame connection grooves (101); a group of first installation sliding blocks (103) are slidably connected in the four groups of first installation slide grooves (102); a first sealing baffle (104) is fixedly connected between the four groups of first installation sliding blocks (103); and the four first sealing baffles (104) are respectively aligned with the four door frame connection grooves (101).

3. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: A group of second installation grooves (114) are each provided in the plurality of door body connection grooves (113); a group of second installation slide blocks (115) are each slidably connected in the plurality of second installation grooves (114); a second sealing baffle plate (116) is fixedly connected between the plurality of second installation slide blocks (115); and the plurality of second sealing baffle plates (116) are respectively aligned with the positions of the plurality of door body connection grooves (113).

4. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: A guide slide bar (119) is slidably connected inside the fixed frame (118); a sealing block (120) is fixedly connected to the top end surface of the guide slide bar (119); the sealing block (120) is inserted into the top end surface of the fixed column (105); a fixing spring (121) is fixedly connected to the bottom end surface of the sealing block (120); the end of the fixing spring (121) is fixedly connected to the bottom end surface of the fixed frame (118).

5. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: A connecting pressure block (126) is fixedly connected to the outer side of the bottom end surface of the sealing frame (124); a control block (129) is fixedly connected to the lower part of the bearing outer ring (107); the control block (129) is slidably connected in the fixed column (105); and the control block (129) and the connecting pressure block (126) are aligned in position.

6. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: The exterior of the fixing column (105) is provided with a plurality of first oil outlet holes (122) in the form of an annular array; the exterior of the bearing ball (106) is provided with a plurality of second oil outlet holes (128) in the form of an annular array; the plurality of second oil outlet holes (128) are respectively aligned with the positions of the plurality of first oil outlet holes (122); the exterior of the sealing frame (124) is provided with a plurality of oil leakage grooves (125) in the form of an annular array; the plurality of oil leakage grooves (125) are respectively arranged in a staggered manner with the plurality of first oil outlet holes (122).

7. The large-opening-angle heavy-duty door shaft structure according to claim 6, characterized in that: The plurality of groups of the first oil outlet holes (122) are all fixedly connected with an oil buffer block (123); the plurality of groups of the oil buffer blocks (123) are all cylindrical structures made of porous materials; the diameters of the plurality of groups of the oil buffer blocks (123) are all the same as the diameters of the plurality of groups of the first oil outlet holes (122); and the plurality of groups of the oil buffer blocks (123) are respectively aligned with the positions of the plurality of groups of the second oil outlet holes (128).

8. The large-opening-angle heavy-duty door shaft structure according to claim 1, characterized in that: The top surface of the door frame connecting plate (1) is slidably connected to a movable slide (109); the lower part of the movable slide (109) is fixedly connected to a connecting spring (110); the end of the connecting spring (110) is fixedly connected in the door frame connecting plate (1); the top surface of the movable slide (109) is fixedly connected to a limiting bracket (111); the limiting bracket (111) is aligned with the position of the fastening nut (108).

Images