A heavy-duty door T-shaped top shaft

Abstract

The utility model discloses a heavy-duty door T-shaped top shaft, specifically related to the field of door shafts, including a mounting plate, the top of the mounting plate is welded and fixedly connected to a limiting tube, the bottom of the inner cavity of the limiting tube is provided with a limiting groove, a bearing is provided in the middle of the limiting groove, an annular groove is provided at the top of the limiting tube, an oil groove is provided at the bottom of the inner cavity of the annular groove, and a plurality of rolling balls are provided in the middle of the annular groove. The utility model firstly improves the rotation smoothness between the rotating shaft and the limiting tube by providing a bearing, and injects lubricating oil into the oil groove through an oil inlet hole, so that the lubricating oil is located inside the annular groove and spreads around the rolling balls, so that the limiting tube can fit with the rolling balls first when fitting with a side wall of the lower sleeve, so that when the rotating shaft rotates, the friction between the limiting tube and the lower sleeve can be avoided, and the wear resistance is improved by the rolling balls, the rotation smoothness is improved, and the mute effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of door shafts, and more specifically to a heavy-duty door T-shaped top shaft. Background Art

[0002] The door axis is mainly used to connect the door frame and the door, so that the door can open and close relative to the door frame with the door axis as the center. As the most common revolving door, it has always been necessary to connect the door frame and the door leaf, and make the connection movable to ensure that the door leaf can rotate and open and close normally along the direction of the door frame.

[0003] In the prior art, the other end of the hinge shaft is threaded, and threaded connection is required during the connection process, which is inconvenient. During positioning, it is not easy to align the axes of the fixed door shaft and the movable door shaft.

[0004] The utility model with Chinese patent application number CN201822254111.1 discloses a novel top shaft for doors. When the shaft core is fixed to the first limiting hole, the upper shaft sleeve and the lower shaft sleeve are in a fixed state, and when the shaft core is fixed to the second limiting hole, the upper shaft sleeve and the lower shaft sleeve are in a separated state. The shaft core can control the upper shaft sleeve and the lower shaft sleeve to be in a fixed state or a separated state, so that the top shaft has the beneficial effect of convenient installation and disassembly;

[0005] Then, combined with the drawings in the instruction manual, it can be seen that the middle part of the upper sleeve in the top shaft is only connected to the rotating shaft through the bearing for limited rotation, so as to achieve the wear-resistant and silent effect. During installation and use, it is inevitable that one side wall of the upper sleeve will fit with one side wall of the lower sleeve, thereby generating friction during rotation, causing wear, and easily affecting the smoothness of rotation and the use effect. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a heavy-duty door T-shaped top shaft to solve the problems raised in the above background technology.

[0007] To achieve the above purpose, the utility model provides the following technical solutions: a heavy-duty door T-shaped top shaft, comprising a mounting plate, the top of the mounting plate is welded and fixedly connected to a limiting tube, a limiting groove is provided at the bottom of the inner cavity of the limiting tube, a bearing is provided in the middle of the limiting groove, an annular groove is provided at the top of the limiting tube, an oil groove is provided at the bottom of the inner cavity of the annular groove, and a plurality of rolling balls are provided in the middle of the annular groove;

[0008] An oil inlet hole is provided at a position corresponding to the oil groove on one side of the limit tube, and a sealing plug is provided at the inner cavity opening of the oil inlet hole.

[0009] Preferably, a through hole is provided in the middle of the mounting plate at a position corresponding to the inner cavity of the limiting tube, and the inner cavity diameter of the bearing is smaller than the inner cavity diameter of the limiting tube.

[0010] Preferably, mounting holes are symmetrically opened around the mounting plate, and reinforcing plates are symmetrically fixedly connected to the bottoms of both sides of the limiting tube, and the bottom wall of the reinforcing plate is fixedly connected to the top wall of the mounting plate.

[0011] Preferably, the diameter of the rolling ball is the same as the inner diameter of the annular groove, and the opening width of the annular groove is smaller than the diameter of the rolling ball.

[0012] Preferably, the inner cavity of the oil inlet hole is communicated with the inner cavity of the oil tank, the sealing plug is tightly fitted with the inner cavity of the oil inlet hole, and the sealing plug is made of cork.

[0013] Preferably, the inner cavity diameter of the bearing is matched with the corresponding shaft diameter, and the top wall of the rolling ball is higher than the top wall of the limiting tube.

[0014] Technical effects and advantages of the utility model:

[0015] 1. The utility model can improve the rotation smoothness between the rotating shaft and the limit tube by setting the bearing first, and inject lubricating oil into the oil groove through the oil inlet hole, so that the lubricating oil is located inside the annular groove and spreads around the rolling ball, so that the limit tube and the side wall of the lower sleeve can be fitted with the rolling ball first, so that when the rotating shaft rotates, the limit tube and the lower sleeve can avoid friction, and the wear resistance effect is improved by the rolling ball, the rotation smoothness is improved, and the mute effect is improved;

[0016] 2. The utility model can also conveniently install and fix the mounting plate through the provided mounting holes, and improve the supporting strength of the mounting plate and the limit tube welding and fixing through the reinforcing plate, and can limit and block the lubricating oil injected into the oil tank through the oil inlet hole through the sealing plug, so as to prevent the lubricating oil from flowing out through the oil inlet hole, playing the role of blocking and limiting, and supporting and limiting the bearing through the limit groove, which is convenient for manufacturing and use, and improves the use effect;

[0017] In summary, through the mutual influence of the above-mentioned multiple effects, the smoothness of rotation can be improved, friction can be avoided, and the effects of wear resistance and quietness can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0021] Figure 4 It is a side cross-sectional structural schematic diagram of the utility model.

[0022] Figure 5 For this utility model Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] The accompanying drawings are marked as follows: 1. mounting plate; 2. limiting tube; 3. limiting groove; 4. bearing; 5. annular groove; 6. oil groove; 7. rolling ball; 8. oil inlet hole; 9. sealing plug; 10. mounting hole; 11. reinforcing plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] As attached Figure 1-5 A heavy-duty door T-shaped top shaft shown in the figure comprises a mounting plate 1, the top of the mounting plate 1 is welded and fixedly connected to a limiting tube 2, the limiting tube 2 can limit the rotating shaft, a limiting groove 3 is provided at the bottom of the inner cavity of the limiting tube 2, a bearing 4 is provided in the middle of the limiting groove 3, the bearing 4 is limited and fixed by the limiting groove 3, and the rotating shaft inserted in the middle of the limiting tube 2 can be limited by the bearing 4, and the smoothness between the rotating shaft and the limiting tube 2 can be improved, thereby improving the wear-resistant and silent effect, an annular groove 5 is provided at the top of the limiting tube 2, an oil groove 6 is provided at the bottom of the inner cavity of the annular groove 5, and a plurality of rolling balls 7 are provided in the middle of the annular groove 5, through the cooperation of the rolling balls 7 and the annular groove 5, the upper shaft can avoid being supported by the fitting wall body corresponding to the wall body at one end of the limiting tube 2, and the smoothness of rotation can be improved to avoid friction, and at the same time, by injecting lubricating oil into the oil groove 6, the lubrication effect can be further improved, and the wear-resistant and silent effect can be improved;

[0026] An oil inlet hole 8 is opened on one side of the limiting tube 2 at a position corresponding to the oil groove 6, and a sealing plug 9 is provided at the inner opening of the oil inlet hole 8. Lubricating oil can be injected into the interior of the oil groove 6 through the oil inlet hole 8, and the opening of the oil groove 6 can be sealed by the sealing plug 9 to improve the use effect of the lubricating oil.

[0027] As attached Figure 3 , 4As shown, a through hole is opened in the middle of the mounting plate 1 at a position corresponding to the inner cavity of the limiting tube 2, and the inner cavity diameter of the bearing 4 is smaller than the inner cavity diameter of the limiting tube 2. Through the cooperation of the through hole and the limiting tube 2, the insertion depth of the rotating shaft will not be affected, thereby improving the use effect. In addition, through the bearing 4, the connection stability of the rotating shaft is improved, thereby improving the use effect.

[0028] As attached Figure 1-3 As shown, mounting holes 10 are symmetrically opened around the mounting plate 1, and reinforcing plates 11 are symmetrically fixedly connected to the bottom of both sides of the limiting tube 2. The bottom wall of the reinforcing plate 11 is fixedly connected to the top wall of the mounting plate 1. The mounting holes 10 can be used to conveniently install and fix the mounting plate 1, and the reinforcing plate 11 can improve the connection stability between the mounting plate 1 and the limiting tube 2 and improve the combined strength.

[0029] As attached Figure 1-5 As shown, the diameter of the ball 7 is the same as the inner diameter of the annular groove 5, and the opening width of the annular groove 5 is smaller than the diameter of the ball 7. The annular groove 5 can limit the ball 7 to prevent the ball 7 from falling out of the annular groove 5, thereby improving the use effect of the ball 7.

[0030] As attached Figure 4 , 5 As shown, the inner cavity of the oil inlet hole 8 is connected with the inner cavity of the oil groove 6, and the sealing plug 9 is tightly fitted with the inner cavity of the oil inlet hole 8. The sealing plug 9 is set to be made of cork material. Lubricating oil is injected into the interior of the oil groove 6 through the oil inlet hole 8, and the lubricating oil is input into the interior of the annular groove 5. When the ball 7 rotates, the lubricating oil adheres to the surface of the ball 7, thereby improving the smoothness of the rotation of the ball 7 and improving the use effect. The opening of the oil inlet hole 8 can be sealed by the sealing plug 9, and by extending a needle through the sealing plug 9 to the interior of the oil inlet hole 8, the lubricating oil can be injected into the interior of the oil groove 6 through the needle, thereby improving the use effect.

[0031] As attached Figure 1 , 3 As shown in Figures 4 and 5, the inner diameter of the bearing 4 is matched with the corresponding shaft diameter, and the top wall of the ball 7 is higher than the top wall of the limiting tube 2. The bearing 4 can improve the rotation stability and smoothness of the shaft, and the ball 7 can support the wall on one side of the limiting tube 2 to avoid friction with the limiting tube 2, thereby further improving the smoothness of rotation.

[0032] Working principle of the utility model: when in use, the mounting plate 1 can be fixed at a preset position by inserting a rivet into the mounting hole 10, and the connection and fixing strength between the limiting tube 2 and the mounting plate 1 can be improved by the reinforcing plate 11, and then the rotating shaft is inserted into the limiting tube 2, and the rotating shaft passes through the wall of the bearing 4 and fits tightly with the inner cavity wall of the bearing 4, so that the stability and smoothness of the rotation of the rotating shaft relative to the limiting tube 2 can be ensured through the bearing 4;

[0033] When the wall at one end of the shaft connector fits with the ball 7, the ball 7 can cooperate to avoid friction with the limiting tube 2, further improving the smoothness of rotation. At the same time, a needle is inserted into the sealing plug 9 to inject lubricating oil into the oil tank 6 through the oil inlet hole 8, which can improve the smoothness of rotation of the ball 7 and improve the use effect.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy-duty door T-shaped top shaft, comprising a mounting plate (1), characterized in that: The top of the mounting plate (1) is welded and fixedly connected to a limiting tube (2); a limiting groove (3) is provided at the bottom of the inner cavity of the limiting tube (2); a bearing (4) is provided in the middle of the limiting groove (3); an annular groove (5) is provided at the top of the limiting tube (2); an oil groove (6) is provided at the bottom of the inner cavity of the annular groove (5); and a plurality of rolling balls (7) are provided in the middle of the annular groove (5); An oil inlet hole (8) is provided at a position corresponding to the oil groove (6) on one side of the limit tube (2), and a sealing plug (9) is provided at the inner cavity opening of the oil inlet hole (8).

2. A heavy-duty door T-shaped top shaft according to claim 1, characterized in that: A through hole is provided in the middle of the mounting plate (1) at a position corresponding to the inner cavity of the limiting tube (2); the inner cavity diameter of the bearing (4) is smaller than the inner cavity diameter of the limiting tube (2).

3. A heavy-duty door T-shaped top shaft according to claim 1, characterized in that: The mounting plate (1) is symmetrically provided with mounting holes (10) on all sides, and the bottoms of both sides of the limiting tube (2) are symmetrically fixedly connected with reinforcing plates (11), and the bottom wall of the reinforcing plate (11) is fixedly connected to the top wall of the mounting plate (1).

4. A heavy-duty door T-shaped top shaft according to claim 1, characterized in that: The diameter of the rolling ball (7) is the same as the inner diameter of the annular groove (5), and the opening width of the annular groove (5) is smaller than the diameter of the rolling ball (7).

5. The heavy-duty door T-shaped top shaft according to claim 1, characterized in that: The inner cavity of the oil inlet hole (8) is in communication with the inner cavity of the oil tank (6), the sealing plug (9) is tightly fitted with the inner cavity of the oil inlet hole (8), and the sealing plug (9) is made of cork.

6. A heavy-duty door T-shaped top shaft according to claim 1, characterized in that: The inner cavity diameter of the bearing (4) is matched to the corresponding shaft rod diameter, and the top wall of the rolling ball (7) is higher than the top wall of the limiting tube (2).

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