Horizontal rotary table sealing structure

Abstract

This utility model relates to the technical field of horizontal rotary tables, and in particular to a sealing structure for a horizontal rotary table, including a pipe, a cover, a sealing ring, a radial limiting component, and an axial limiting component. The pipe is fixed to the outer wall of the base and is connected to a lubricating oil delivery pipe inside the base. An annular mounting groove is provided on the side of the cover facing the pipe. The sealing ring is embedded in the mounting groove, and its thickness is greater than the depth of the mounting groove. The radial limiting component is located on the outside of the cover. When the cover is closed to the opening end of the pipe, the radial limiting component is used to limit the relative displacement of the cover and the pipe in the radial direction. The axial limiting component is located on the outside of the radial limiting component. After the radial limiting component completes radial limiting, the axial limiting component is used to limit the relative displacement of the cover and the pipe in the axial direction. This structure can prevent the sealing plug from shifting due to equipment vibration, improve sealing performance, ensure that the lubricating oil does not leak out and that external impurities do not enter, and extend the service life of the horizontal rotary table.

Description

Technical Field

[0001] This utility model relates to the technical field of horizontal turntables, and in particular to a sealing structure for a horizontal turntable. Background Technology

[0002] Horizontal rotary tables have wide applications in the machining field. Taking machining centers as an example, they often work in conjunction with worktables, significantly improving machining efficiency by performing lifting and rotational actions. A horizontal rotary table contains a transmission component that enables rotation and lifting. During operation, relative movement occurs between some parts of this transmission component. Good lubrication effectively reduces frictional resistance, alleviates wear on machine parts, reduces energy loss, and simultaneously cleans and cools the surface of parts, thereby extending the service life of the equipment. Currently, horizontal rotary tables often lubricate relevant parts by periodically adding oil to critical friction areas through oil inlets. To seal the oil inlet when no additional lubrication is needed, a sealing plug is usually used to ensure that lubricating oil does not leak out and external impurities do not enter. However, under vibration generated during equipment operation, the sealing plug is prone to displacement, which leads to a decrease in sealing performance. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a horizontal turntable sealing structure that is resistant to loosening and has good sealing performance.

[0004] This utility model discloses a horizontal rotary table sealing structure, including a pipe, a cover, a sealing ring, a radial limiting component, and an axial limiting component. The pipe is fixed to the outer wall of the base and is connected to a lubricating oil delivery pipe inside the base. An annular mounting groove is provided on the side of the cover facing the pipe. The sealing ring is embedded in the mounting groove, and its thickness is greater than the depth of the mounting groove. The radial limiting component is located on the outside of the cover. When the cover is closed to the pipe opening, the radial limiting component is used to limit the relative displacement of the cover and the pipe in the radial direction. The axial limiting component is located on the outside of the radial limiting component. After the radial limiting component completes radial limiting, the axial limiting component is used to limit the relative displacement of the cover and the pipe in the axial direction.

[0005] As a preferred embodiment of the present invention, the radial limiting component includes a first ring, a first collar, a second ring, and a second collar. The first ring is fixed to the outside of the pipe, the first collar is disposed on the side of the first ring near the cover, the second ring is fixed to the outside of the cover, and the second collar is fixed to the side of the second ring near the pipe. The first collar has an accommodating space for the insertion of the second collar.

[0006] As a preferred embodiment of this utility model, the first ring is provided with axially distributed protrusions, and the second ring is provided with a second groove corresponding to the protrusions.

[0007] As a preferred embodiment of this utility model, a preset distance is left between the first ring and the first sleeve ring and the end of the pipe away from the base, and the preset distance is greater than the outer diameter of the pipe connecting to the external lubricating oil source.

[0008] As a preferred embodiment of this utility model, the axial limiting component includes a first semi-circular shell and a second semi-circular shell that can be joined to form a closed-loop structure. One end of the first semi-circular shell and the second semi-circular shell are rotatably connected, and the other end is snapped together. Both sides of the first semi-circular shell and the second semi-circular shell are provided with pressing blocks extending toward their centers. By fitting the closed-loop structure onto the outside of the first ring after insertion, the pressing blocks can clamp the first ring and the second ring.

[0009] As a preferred embodiment of this utility model, the snap-fit ​​ends of the first semi-circular shell and the second semi-circular shell are respectively provided with connecting ears. A screw is rotatably connected to one connecting ear, and a snap-fit ​​block is screwed onto the screw. The other connecting ear is provided with a first snap-fit ​​groove. The width of the first snap-fit ​​groove is greater than the outer diameter of the screw and less than the outer diameter of the snap-fit ​​block.

[0010] As a preferred embodiment of this utility model, reinforcing members are provided between the pressure block and the corresponding semi-circular shell connecting part, and between the connecting ear and the corresponding semi-circular shell connecting part.

[0011] As a preferred embodiment of this utility model, there are several pressure blocks on the first semicircular shell and the second semicircular shell, and they are evenly spaced along the circumferential direction on their respective corresponding semicircular shells.

[0012] As a preferred embodiment of this utility model, a chamfer is provided on the edge of one end of the pressing blocks away from their corresponding semi-circular shells.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting radial and axial limiting components, the relative displacement between the cover and the pipeline in the radial and axial directions can be effectively limited, avoiding the problem of the sealing plug loosening due to equipment vibration. At the same time, the sealing ring is embedded in the installation groove and its thickness is greater than the groove depth, ensuring that the sealing ring can be tightly pressed when the cover is closed, improving the sealing performance, preventing lubricating oil leakage and the entry of external impurities, thereby extending the service life of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the structure of this utility model. Figure 3 ; The following are labels in the attached diagram: 1. Pipe; 2. Cover; 3. Sealing ring; 4. Radial limiting assembly; 41. First ring; 42. First collar; 421. Accommodating space; 422. Protrusion; 43. Second ring; 44. Second collar; 441. Second groove; 5. Axial limiting assembly; 51. First semi-circular shell; 52. Second semi-circular shell; 53. Pressure block; 531. Chamfer; 54. Connecting lug; 55. Screw; 56. Locking block; 57. First groove; 58. Reinforcing member; 6. Base; 7. Conveying pipe. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Reference Figures 1 to 3This embodiment provides a horizontal turntable sealing structure, including a pipe 1, a cover 2, a sealing ring 3, a radial limiting component 4, and an axial limiting component 5. The pipe 1 is fixed to the outer wall of the base 6 and connected to a lubricating oil delivery pipe 7 inside the base 6. The inner diameter of the pipe 1 is consistent with the inner diameter of the lubricating oil delivery pipe 7 inside the base 6, and the connection between the two can be welded to prevent lubricating oil leakage from the connection point during delivery. The cover 2 has a circular disc-shaped structure with an annular mounting groove on the side facing the pipe 1. The sealing ring 3 is embedded in the mounting groove, and the center of the annular mounting groove coincides with the center of the cover 2 to ensure that the sealing ring 3 can uniformly fit the opening of the pipe 1 after installation. The width of the annular mounting groove is determined based on the cross-sectional diameter of the sealing ring 3, and is usually 0.1-0.2 mm smaller than the cross-sectional diameter of the sealing ring 3. After the sealing ring 3 is embedded, the side wall of the mounting groove can exert a certain squeezing effect on the sealing ring 3, thus initially improving the sealing effect. The diameter of the cover 2 needs to be larger than the outer diameter of the opening end of the pipe 1 to ensure that the cover 2 can completely cover the opening end of the pipe 1 after it is closed, preventing external impurities from entering from the edge gap between the cover 2 and the pipe 1. The sealing ring 3 can be made of various elastic materials, such as nitrile rubber. The material is either fluororubber or its thickness must be greater than the depth of the installation groove. When the cover 2 is closed on the open end of the pipe 1, the open end of the pipe 1 will exert a squeezing effect on the sealing ring 3, causing the sealing ring 3 to undergo elastic deformation, further filling the gap between the cover 2 and the pipe 1, and enhancing the sealing effect. The radial limiting component 4 is set on the outside of the cover 2, and its structural design must be adapted to the shape of the cover 2 and the pipe 1. When the cover 2 is closed on the open end of the pipe 1, it ensures reliable radial limiting without affecting the closing and opening of the cover 2. The axial limiting component 5 is located outside the radial limiting component 4. After the radial limiting component 4 completes radial limiting, the axial limiting component 5 is used to limit the relative displacement of the cover 2 and the pipe 1 in the axial direction, preventing the cover 2 from loosening or falling off axially when the equipment vibrates. The connection between the axial limiting component 5 and the radial limiting component 4 needs to be easy to install and disassemble. A detachable connection is usually adopted so that when lubrication is required, the axial limiting component 5 and the radial limiting component 4 can be quickly disassembled and the cover 2 can be opened for operation. During the installation process, the sealing ring 3 should first be embedded in the annular mounting groove to ensure that the sealing ring 3 completely fits the bottom and side wall of the mounting groove without twisting or offset. Then, the cover 2 is aligned with the opening end of the pipe 1 and closed. The radial limiting component 4 is then installed to ensure that the radial limiting component 4 can accurately position the cover 2 and the pipe 1 radially. Finally, the axial limiting component 5 is installed to ensure that the axial limiting component 5 can accurately position the cover 2 and the pipe 1 axially.

[0018] Specifically, the radial limiting component 4 includes a first ring 41, a first collar 42, a second ring 43, and a second collar 44; the first ring 41 is fixed to the outside of the pipe 1, and its inner diameter is the same as the outer diameter of the pipe 1; the first collar 42 is disposed on the side of the first ring 41 near the cover 2, and its inner diameter is larger than the outer diameter of the pipe 1; the second ring 43 is fixed to the outside of the cover 2, and its inner diameter is the same as the outer diameter of the cover 2; the second collar 44 is fixed on the side of the second ring 43 near the pipe 1; the first collar 42 has an accommodating space 421 for the insertion of the second collar 44. The width of the accommodating space 421 in the radial direction must be matched with the thickness of the second collar 44, and the height in the axial direction must be matched with the height of the second collar 44. When the cover 2 is closed on the opening end of the pipe 1, the second collar 44 will be accurately inserted into the accommodating space 421, and the inner wall of the accommodating space 421 will fit against the outer wall of the second collar 44. In this way, the cover 2 can be prevented from moving in the radial direction. Even if the equipment generates large vibrations during operation, the cover 2 will not cause the sealing ring 3 to deviate from the sealing position due to radial displacement, thereby ensuring the stability of the sealing performance.

[0019] The first ring 42 is provided with axially distributed protrusions 422, and the second ring 44 is provided with a second groove 441 corresponding to the protrusions 422. When the second ring 44 is inserted into the receiving space 421 of the first ring 42, the protrusions 422 will be inserted into the second groove 441 at the same time. Through the snap-fit ​​cooperation between the protrusions 422 and the second groove 441, the relative rotation of the cover 2 and the pipe 1 in the circumferential direction is further restricted, and the reliability of radial limiting is enhanced. Even if the equipment generates torsional vibration during operation, the cover 2 will not cause the sealing ring 3 to wear or the sealing position to shift due to circumferential rotation, thereby further ensuring the stability and service life of the sealing structure.

[0020] A preset distance is maintained between the first ring 41 and the first sleeve ring 42 and the end of the pipe 1 furthest from the base 6. This preset distance is greater than the outer diameter of the connection end between the pipe 1 and the external lubricating oil source. The connection end between the pipe 1 and the external lubricating oil source is usually connected by a threaded connection or a quick coupling. The preset distance provides sufficient operating space for the connection between the pipe 1 and the external lubricating oil source, ensuring that the outer wall of the connection end will not rub or collide with the inner wall of the first sleeve ring 42 during installation or disassembly, thus protecting the structural integrity of the connection end and the radial limiting component 4.

[0021] The axial limiting component 5 includes a first semi-circular shell 51 and a second semi-circular shell 52 that can be docked to form a closed-loop structure. The inner wall radius of the first semi-circular shell 51 and the second semi-circular shell 52 is adapted to the outer diameter of the first sleeve ring 42 after insertion, and the axial length needs to cover the total width of the first ring 41 and the second ring 43. One end of the first semi-circular shell 51 and the second semi-circular shell 52 is rotatably connected, and the other end is snapped, which facilitates installation and disassembly. Both sides of the first semi-circular shell 51 and the second semi-circular shell 52 are provided with pressure blocks 53 extending towards their center. The extension length needs to ensure that the end faces of the first ring 41 and the second ring 43 can be pressed simultaneously. By fitting the closed-loop structure outside the first sleeve ring 42 after insertion, the pressure blocks 53 can clamp the first ring 41 and the second ring 43, thereby limiting the relative displacement of the cover 2 and the pipe 1 in the axial direction.

[0022] The first semi-circular shell 51 and the second semi-circular shell 52 are respectively provided with connecting ears 54, and the two connecting ears 54 can be completely aligned when the semi-circular shells are closed, so as to avoid the snap-fit ​​structure from not working properly due to misalignment; a screw 55 is rotatably connected to one connecting ear 54, and a locking block 56 is screwed onto the screw 55; the other connecting ear 54 is provided with a first locking groove 57, the width of the first locking groove 57 is greater than the outer diameter of the screw 55 and smaller than the outer diameter of the locking block 56. After the first semicircular shell 51 and the second semicircular shell 52 are closed around the rotating end, rotate the screw 55 to lock it into the first slot 57 of the other connecting ear 54. Then rotate the locking block 56 to move it closer to the connecting ear 54 until the end face of the locking block 56 is tightly fitted with the surface of the connecting ear 54. At this time, the two semicircular shells are firmly fixed and can form a stable closed-loop structure. When disassembling, rotate the locking block 56 to separate the locking block 56 from the connecting ear 54. Then rotate the screw 55 to remove it from the first slot 57. Open the two semicircular shells around the rotating end to complete the disassembly of the axial limiting component 5.

[0023] To ensure that the axial pressure is evenly distributed on the first ring 41 and the second ring 43 and to avoid local stress concentration that could lead to component deformation, several pressure blocks 53 are provided on the first semi-circular shell 51 and the second semi-circular shell 52, and are evenly spaced along the circumference on their respective semi-circular shells. The evenly distributed pressure blocks 53 can transmit the axial pressure evenly to the end faces of the first ring 41 and the second ring 43. Each pressure block bears the same pressure, avoiding excessive local pressure due to uneven distribution of pressure blocks 53, thereby preventing plastic deformation or cracks on the end faces of the rings and extending the service life of the rings.

[0024] To reduce the risk of interference when assembling the pressure block 53 with the ring, a number of pressure blocks 53 have a chamfer 531 on the edge of one end away from their corresponding semicircular shell. When installing the axial limiting component 5, the pressure block 53 needs to be precisely aligned with the end faces of the first ring 41 and the second ring 43. If the edge of the pressure block end is sharp, it is easy for the sharp edge to interfere with the end face of the ring during the fitting of the semicircular shell, causing the semicircular shell to fail to fit smoothly. After setting the chamfer 531, the end of the pressure block 53 forms a smooth transition surface, which can guide the pressure block 53 to contact the end face of the ring smoothly, reduce the assembly difficulty, and improve the assembly efficiency.

[0025] During operation, the pressure block 53 needs to withstand axial pressure and vibration impact. Long-term use can easily lead to stress concentration at the connection between the pressure block and the semi-circular shell, resulting in breakage. The connecting ear 54 needs to withstand the tensile force applied by the screw 55 and the locking block 56, as well as the bending force generated by equipment vibration. This can easily lead to bending deformation or breakage at the connection between the connecting ear and the semi-circular shell. To enhance the structural strength of the connection, reinforcing members 58 are provided between the pressure block 53 and the corresponding semi-circular shell connection, and between the connecting ear 54 and the corresponding semi-circular shell connection. The reinforcing member 58 can adopt a triangular rib structure, which has excellent bending and shear resistance, effectively disperses the stress at the connection, enhances the structural strength of the connection, reduces the deformation of the component under vibration, and further ensures the clamping effect, thereby ensuring the long-term stability of the sealing performance of the sealing structure.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A horizontal rotary table seal structure, characterized by, The system includes a pipe (1), a cover (2), a sealing ring (3), a radial limiting component (4), and an axial limiting component (5). The pipe (1) is fixed to the outer wall of the base (6) and is connected to the lubricating oil delivery pipe (7) inside the base (6). The cover (2) has an annular mounting groove on the side facing the pipe (1). The sealing ring (3) is embedded in the mounting groove and its thickness is greater than the depth of the mounting groove. The radial limiting component (4) is located outside the cover (2). When the cover (2) is closed on the opening end of the pipe (1), the radial limiting component (4) is used to limit the relative displacement of the cover (2) and the pipe (1) in the radial direction. The axial limiting component (5) is located outside the radial limiting component (4). After the radial limiting component (4) completes the radial limiting, the axial limiting component (5) is used to limit the relative displacement of the cover (2) and the pipe (1) in the axial direction.

2. The horizontal turntable seal construction of claim 1 wherein, The radial limiting component (4) includes a first ring (41), a first collar (42), a second ring (43), and a second collar (44). The first ring (41) is fixed to the outside of the pipe (1). The first collar (42) is disposed on the side of the first ring (41) near the cover (2). The second ring (43) is fixed to the outside of the cover (2). The second collar (44) is fixed on the side of the second ring (43) near the pipe (1). The first collar (42) has an accommodating space (421) for the second collar (44) to be inserted.

3. The horizontal turntable seal construction of claim 2 wherein, The first collar (42) is provided with an axially distributed protrusion (422), and the second collar (44) is provided with a second groove (441) corresponding to the protrusion (422).

4. The horizontal turntable seal construction of claim 2 wherein, The first ring (41) and the first collar (42) are separated from the end of the pipe (1) away from the base (6) by a preset distance, which is greater than the outer diameter of the pipe (1) connected to the external lubricating oil source.

5. The horizontal turntable seal construction of claim 2 wherein, The axial limiting component (5) includes a first semi-circular shell (51) and a second semi-circular shell (52) that can be docked to form a closed-loop structure. One end of the first semi-circular shell (51) and the second semi-circular shell (52) are rotatably connected, and the other end is snapped. Both sides of the first semi-circular shell (51) and the second semi-circular shell (52) are provided with pressure blocks (53) extending toward their center. By fitting the closed-loop structure onto the outside of the first ring (42) after insertion, the pressure blocks (53) can clamp the first ring (41) and the second ring (43).

6. The horizontal turntable seal construction of claim 5 wherein, The first semi-circular shell (51) and the second semi-circular shell (52) are respectively provided with connecting ears (54). A screw (55) is rotatably connected to one of the connecting ears (54), and a locking block (56) is screwed onto the screw (55). The other connecting ear (54) is provided with a first locking groove (57). The width of the first locking groove (57) is greater than the outer diameter of the screw (55) and smaller than the outer diameter of the locking block (56).

7. The horizontal turntable seal construction of claim 6 wherein, A reinforcing member (58) is provided between the pressure block (53) and the corresponding semi-circular shell connecting part, and between the connecting ear (54) and the corresponding semi-circular shell connecting part.

8. The horizontal turntable seal construction of claim 5 wherein, There are several pressure blocks (53) on the first semicircular shell (51) and the second semicircular shell (52), and they are evenly spaced along the circumference on their respective semicircular shells.

9. The horizontal turntable seal construction of claim 5 wherein, Several of the pressing blocks (53) have a chamfer (531) on one end edge away from their corresponding semi-circular shell.

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