High-speed pneumatic rotary joint
By adopting positioning devices and sliding sleeve structures in high-speed pneumatic rotary joints, the accurate alignment of air holes and airways and the improvement of sealing performance are achieved, solving the problems of accuracy deviation and leakage of traditional joints after long use.
Patent Information
- Application Number
- CN202323632551.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2033-12-28
AI Technical Summary
After a long time of use, the accuracy of the joints is prone to deviations, resulting in misalignment of the air holes and airways, the sealing ring is subjected to additional pressure, which may leak, and the mechanism is difficult to automatically reset, and requires manual maintenance.
A high-speed pneumatic rotary joint is designed, adopting a positioning device and a sliding sleeve structure, which can accurately align the air holes and airways through the positioning rod and connecting rod assembly, and improve sealing performance through the attachment and fit of trapezoidal grooves and sealing rings.
It realizes intuitive display and convenient adjustment of pore accuracy, reduces abnormal displacement, enhances sealing performance, prevents gas leakage, and improves the sealing ability of the equipment.
Smart Images
Figure CN222650799U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a pneumatic joint, in particular to a high-speed pneumatic rotary joint. Background Art
[0002] Pneumatic rotary joints are a series of products specially designed for pneumatic control equipment. They have the advantages of small size, light weight, and low friction torque. They are widely used in many industries such as metallurgical machinery, papermaking machinery, construction machinery, and solar cell manufacturing. In today's technical means, traditional high-end quick pneumatic joints have the problem of long-term use and deviation in the accuracy of the joints. When the main shaft and the housing are relatively rotating, one side is fixed and the other side is driven to rotate. After a long period of work, due to mechanical vibration and friction, the weak constraint structure has a certain possibility of abnormal displacement, misalignment of the pores and airways, and additional pressure on the sealing ring. There is a possibility of leakage, and the mechanism is difficult to reset automatically. At this time, the maintenance personnel need to reinstall it in time to solve the fault to avoid losses. Usually, this kind of fault is difficult to be discovered in time, and the method of manual reinstallation to solve it is cumbersome. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a high-speed pneumatic rotary joint, which has the advantages of convenient air hole accuracy adjustment, intuitive air hole accuracy, anti-leakage when the air hole is not aligned, and good sealing performance.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a high-speed pneumatic rotary joint, comprising a rotating main shaft and a rotating outer shell that rotate relatively, characterized in that: an airway is arranged in the rotating main shaft, an air hole corresponding to the airway is arranged on the rotating outer shell, a positioning device is arranged on the rotating main shaft, the positioning device comprises a connecting rod assembly, a positioning rod located at the free end of the connecting rod assembly, and the positioning rod can be inserted into the air hole and the airway; a limiting device for accommodating the connecting rod assembly is arranged on the connecting rod assembly; a positioning line 1 is arranged on the rotating outer shell and coincides with the center line of the air hole in the vertical direction, and a positioning line 2 is arranged on the rotating main shaft and coincides with the center line of the air port in the vertical direction, and when the air hole and the airway are relatively aligned, the positioning line 1 and the positioning line 2 are aligned.
[0005] The utility model is further configured that a sliding sleeve is provided between the rotating main shaft and the rotating outer shell, a plurality of air ports are provided on the sliding sleeve, grooves are provided between adjacent air ports, and sealing rings are provided in the grooves.
[0006] The utility model is further configured that convex ridges are arranged on both sides of one side of the air port close to the rotating shell, and the rotating shell is provided with recesses matched with the convex ridges.
[0007] By adopting the above technical scheme, a convex ridge is provided on one side of the air port, and a matching recess is provided on the rotating shell, which helps to enhance the connection stability between the sliding sleeve and the rotating shell, and helps to reduce abnormal displacement when the equipment rotates; the positioning line 1 provided on the rotating shell and the positioning line 2 provided on the rotating spindle help to ensure that the joint can be accurately aligned during the rotational movement, and the air hole accuracy is intuitive; the detachable positioning device provided on the rotating spindle is easy to adjust and use, and the air hole accuracy adjustment is convenient.
[0008] The utility model is further configured such that the groove is configured as a trapezoidal structure which is wide inside and narrow outside, and the sealing ring is closely fitted with the groove.
[0009] The utility model is further configured that the sealing ring is made of a rubber material.
[0010] By adopting the above technical solution, the trapezoidal structure of the groove and the close fit with the sealing ring help to improve the sealing performance of the joint, help prevent gas leakage during equipment operation, and enhance the sealing ability of the equipment; the use of rubber material helps to provide good elasticity and sealing performance, adapt to rotational motion, and have long-term durability.
[0011] In summary, the beneficial effects of the utility model are:
[0012] 1. The positioning line 1 set on the rotating shell and the positioning line 2 set on the rotating spindle help to ensure that the joint can be accurately aligned during the rotating movement, and the air hole accuracy is intuitive; when deviation occurs, it can be discovered in time, and the positioning device can be used to insert the positioning rod into the air hole and the airway to realign the air hole and the airway, which is convenient for adjustment;
[0013] 2. A convex ridge is provided on one side of the air port, and a matching concave ridge is provided on the rotating housing, which helps to enhance the connection stability between the sliding sleeve and the rotating housing and helps to reduce abnormal displacement when the device rotates;
[0014] 3. The trapezoidal structure of the groove and the close fit with the sealing ring help to improve the sealing performance of the joint, prevent gas leakage during the operation of the equipment, and enhance the sealing ability of the equipment; the use of rubber material helps to provide good elasticity and sealing performance, adapt to rotational motion, and have long-term durability. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a right-side perspective structural diagram of the utility model.
[0016] Figure 2 This is an exploded schematic diagram of the isometric side structure of the utility model.
[0017] Figure 3 It is an isometric structural schematic diagram of the utility model;
[0018] Reference numerals:
[0019] 1. Rotating spindle; 11. Air channel; 2. Rotating housing; 21. Air hole; 3. Sleeve; 31. Air port; 32. Groove; 33. Sealing ring; 4. Positioning device; 41. Connecting rod assembly; 42. Positioning rod; 43. Limiting device; 51. Positioning line one; 52. Positioning line two; 6. Protruding ridge; 61. Notch. DETAILED DESCRIPTION
[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0021] like Figure 1-3 As shown, the present embodiment discloses a high-speed pneumatic rotary joint, including a rotating main shaft 1, a plurality of air passages 11 are arranged in the rotating main shaft 1 for providing a gas passage, a rotating shell 2 is arranged on the rotating main shaft 1, a sliding sleeve 3 is arranged between the rotating shell 2 and the rotating main shaft 1 for setting a structure, an air hole 21 formed by the inlet and outlet of the plurality of air passages 11 is arranged on the rotating shell 2 for providing a gas interface, a plurality of air ports 31 are arranged on the sliding sleeve 3, a groove 32 is arranged between adjacent air ports 31, a sealing ring 33 is arranged in the groove 32, a detachable positioning device 4 is arranged on the rotating main shaft 1, one end of the positioning device 4 is arranged on the top of the rotating main shaft 1, and is bolted with the rotating main shaft 1, and is detachably installed on the rotating main shaft 1. On the main shaft, a connecting rod assembly 41 is arranged at the other end, and a positioning rod 42 which can rotate and slide on the connecting rod assembly 41 is arranged on the connecting rod assembly 41, and the front end of the positioning rod 42 is narrow, so as to facilitate the insertion into the misplaced air hole 21; when the pneumatic joint is abnormally displaced, the air port 31 and the air hole 21 are misaligned, and when the pneumatic joint is working, the rotating shell 2 is fixed on a certain rotating mechanism, the rotating main shaft 1 can rotate, and its axis position is fixed, and the positioning device 4 is arranged on the rotating main shaft 1, at this time, the positioning rod 42 is rotated to extend into the air hole 21, slide left and right, and insert the convex ridge 6 into the notch 61 to complete the calibration work; when the work is completed, the connecting rod assembly 41 is swung to the limit device 43, and the limit device 43 is arranged as a locking tongue with a spring. This design structure is simple and convenient, easy to adjust and use, and the accuracy of the air hole 21 is convenient to adjust.
[0022] The air port 31 is provided with ridges 6 on both sides of one side close to the rotating shell 2, and the rotating shell 2 is provided with recesses 61 adapted to the ridges 6. This arrangement helps to enhance the connection stability between the sleeve 3 and the rotating shell 2 and helps to reduce abnormal displacement when the device rotates.
[0023] A positioning line 51 is provided on the rotating shell 2 and coincides with the center line of the air hole 21 in the vertical direction. A positioning line 52 is provided on the rotating main shaft 1 and coincides with the center line of the air port 31 in the vertical direction. This arrangement helps to ensure that the air hole 21 and the air port 31 can be accurately aligned during the rotational movement of the joint, and the accuracy of the air hole 21 is intuitive.
[0024] The groove 32 is set to a trapezoidal structure that is wide inside and narrow outside, and the sealing ring 33 is closely matched with the groove 32. The trapezoidal structure of the groove 32 and the close match with the sealing ring 33 help to improve the sealing performance of the joint, help prevent gas leakage during the operation of the equipment, and enhance the sealing ability of the equipment.
[0025] The sealing ring 33 is made of a rubber material, which helps to provide good elasticity and sealing performance, adapt to rotational movement, and have long-term durability.
[0026] 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 design concept of the present invention should be included in the protection scope of the present invention.
Claims
1. A high-speed pneumatic rotary joint, comprising a rotating main shaft (1) and a rotating housing (2) that rotate relative to each other, characterized in that: An air channel (11) is arranged in the rotating main shaft (1), an air hole (21) corresponding to the air channel (11) is arranged on the rotating outer shell (2), a positioning device (4) is arranged on the rotating main shaft (1), and the positioning device (4) comprises a connecting rod assembly (41) and a positioning rod (42) located at the free end of the connecting rod assembly (41), and the positioning rod (42) can be inserted into the air channel (21) and the air channel (11); a limiting device (43) for accommodating the connecting rod assembly (41) is arranged on the connecting rod assembly (41); a positioning line 1 (51) is arranged on the rotating outer shell (2) and coincides with the center line of the air channel (21) in the vertical direction, and a positioning line 2 (52) is arranged on the rotating main shaft (1) and coincides with the center line of the air port (31) in the vertical direction. When the air channel (21) and the air channel (11) are aligned, the positioning line 1 (51) and the positioning line 2 (52) are aligned.
2. A high-speed pneumatic rotary joint according to claim 1, characterized in that: A sliding sleeve (3) is arranged between the rotating main shaft (1) and the rotating outer shell (2), a plurality of air ports (31) are arranged on the sliding sleeve (3), grooves (32) are arranged between adjacent air ports (31), and a sealing ring (33) is arranged in the groove (32).
3. A high-speed pneumatic rotary joint according to claim 1, characterized in that: The air port (31) is provided with ridges (6) on both sides of a side close to the rotating shell (2), and the rotating shell (2) is provided with recesses (61) matching the ridges (6).
4. A high-speed pneumatic rotary joint according to claim 2, characterized in that: The groove (32) is configured as a trapezoidal structure that is wide inside and narrow outside, and the sealing ring (33) is closely fitted with the groove (32).
5. A high-speed pneumatic rotary joint according to claim 2, characterized in that: The sealing ring (33) is made of rubber material.