A blocking structure for a pneumatic rotary union
By designing a retaining clamp structure in the pneumatic rotary joint, the problem of easy detachment of bearing components was solved, enhancing the safety and reliability of the structure and meeting the safety requirements of mechanical industry standards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI TUOFA AUTOMATIC CONTROL EQUIP
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-14
AI Technical Summary
The bearing assembly of existing pneumatic rotary joints is prone to detachment, which can obstruct the rotation of the joint, pose a safety hazard, and fail to meet the safety and reliability requirements of mechanical industry standards.
Design a structure including a housing, a connector, a bearing assembly, and a retaining clamp. The retaining clamp forms a mechanical barrier near the mounting hole opening in the housing to prevent the bearing assembly from coming out of the housing, thereby enhancing the safety and reliability of the structure.
It effectively prevents bearing components from falling off, ensures the normal operation of pneumatic rotary joints, eliminates potential faults, and meets the safety and reliability requirements of mechanical industry standards.
Smart Images
Figure CN224497863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rotary joint technology, and in particular to a blocking structure for a pneumatic rotary joint. Background Technology
[0002] Rotary joints for mechanical presses (also known as pneumatic rotary joints for mechanical presses, hereinafter referred to as pneumatic rotary joints) are a type of compressed air rotary sealing device that connects a safety double solenoid valve with a clutch or brake. They are key components for realizing pneumatic control functions in mechanical presses.
[0003] However, in actual operation, existing pneumatic rotary joints often experience rotational obstruction due to internal bearing failure (such as jamming or seizing), causing the connecting pipe between the joint and the safety double valve to become entangled, twisted, or even blocked. This results in the compressed air in the clutch not being able to be discharged in time, which can easily lead to serious safety accidents such as "continuous stroke" of the press, posing a significant safety hazard.
[0004] In addition, the existing structure mainly relies on retaining rings for the bore or shaft to fix the bearing. If these rings fail, the bearing assembly is prone to falling off from the joint or housing, which can cause the joint to shift or the entire assembly to slide out, further exacerbating operational instability and the risk of equipment failure.
[0005] In response to the above issues, Article 5.2.1 of the mechanical industry standard JB / T13903-2020 "Pneumatic Rotary Joints for Mechanical Presses" has clearly put forward higher safety and reliability requirements, requiring that the rotary joints should have functions such as preventing parts from falling off.
[0006] Therefore, there is an urgent need to provide a blocking structure for pneumatic rotary joints to eliminate problems such as bearing detachment. Summary of the Invention
[0007] Therefore, the technical problem to be solved by this utility model is to overcome the problem of easy detachment of the bearing assembly inside the pneumatic rotary joint in the prior art.
[0008] To solve the above technical problems, this utility model provides a blocking structure for a pneumatic rotary joint, comprising:
[0009] The housing is provided with mounting holes;
[0010] The connector is rotatably connected to the mounting hole.
[0011] A bearing assembly, including at least one bearing mounted between the joint and the mounting hole to support rotation of the joint, the bearing assembly being adjacent to the mounting hole;
[0012] The blocking clamp includes two semi-circular clamp bodies, which are clamped to one end of the housing near the opening of the mounting hole. The blocking clamp can be opened or closed, and the blocking clamp is provided with a radially extending blocking edge that extends and covers part of the end face of the opening of the mounting hole.
[0013] In one embodiment of this utility model, multiple bearings are provided, and a gasket and a retaining ring are provided between two adjacent bearings.
[0014] In one embodiment of this utility model, the outer ring of the bearing closest to the blocking clamp in the bearing assembly is provided with a retaining ring for the hole, and the retaining ring for the hole is embedded in the inner side wall of the mounting hole;
[0015] The inner ring of the bearing furthest from the blocking clamp in the bearing assembly is fitted with a shaft retaining ring, which is embedded in the outer wall of the joint.
[0016] In one embodiment of this utility model, the blocking ring is embedded on the outer wall of the joint and closely attached to the outer rings of the two adjacent bearings, and the gasket is closely attached to the inner rings of the two adjacent bearings.
[0017] In one embodiment of this utility model, the blocking ring includes a spring blocking ring or a wire blocking ring.
[0018] In one embodiment of this utility model, the projection of the blocking edge toward the bearing assembly at least covers the retaining ring for the hole.
[0019] In one embodiment of this utility model, one end of each of the two clamp bodies is hinged together by a hinge, and the other end of each of the two clamp bodies is provided with a connector, which is used to open or close the two clamp bodies.
[0020] In one embodiment of this utility model, the connecting member includes a locking screw or a bolt.
[0021] In one embodiment of this utility model, each of the two clamp bodies has a connecting edge extending from one end and / or both ends for interconnection.
[0022] In one embodiment of this utility model, a boss extends radially from one end of the housing near the opening of the mounting hole, and the clamp body is provided with a locking groove that mates with the boss.
[0023] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:
[0024] The present invention relates to a blocking structure for a pneumatic rotary joint.
[0025] In the operation of a pneumatic rotary joint, if the retaining ring on the shaft in a traditional structure fails during the joint's rotation, the bearing can easily detach from the joint's shaft end, causing the machine tool to malfunction. This invention addresses this issue by incorporating an openable and closable retaining clamp, forming a mechanical barrier near the mounting hole opening in the housing. Even if the retaining ring on the hole or shaft fails, it effectively prevents critical components such as the joint and bearing from detaching from the housing, greatly enhancing the overall structural safety and reliability and preventing the problem of bearing assemblies and joints detaching from the housing and causing machine tool malfunction.
[0026] Furthermore, in the operation of pneumatic rotary joints, the bearing may fall off the joint shaft end due to the failure of the shaft retaining ring. This utility model eliminates the potential for failure by setting a retaining ring between two adjacent bearings, so that the bearing cannot fall off the joint shaft end after the shaft retaining ring fails, and is kept in the housing. Attached Figure Description
[0027] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.
[0028] Figure 1 This is a schematic diagram of the blocking structure of the pneumatic rotary joint of this utility model.
[0029] Figure 2 This is a schematic diagram of the main structure of the blocking clamp of this utility model.
[0030] Figure 3 This is a side view of the blocking clamp of this utility model.
[0031] Explanation of reference numerals on the accompanying drawings:
[0032] 1. Housing; 11. Mounting hole; 12. Boss;
[0033] 2. Shaft retaining ring;
[0034] 3. Bearing assembly; 31. Bearing;
[0035] 4. Gaskets;
[0036] 5. Blocking ring;
[0037] 6. A retaining ring is used for the hole;
[0038] 7. Blocking clamp; 71. Clamp body; 711. Blocking edge; 72. Hinge; 73. Connector; 74. Connecting edge; 75. Locking groove;
[0039] 8. Connector. Detailed Implementation
[0040] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.
[0041] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.
[0042] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.
[0043] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.
[0044] Reference Figure 1 As shown, this utility model provides a blocking structure for a pneumatic rotary joint, comprising:
[0045] The housing 1 is provided with mounting holes 11;
[0046] Connector 8 is rotatably connected to the mounting hole 11;
[0047] The bearing assembly 3 includes at least one bearing 31 installed between the joint 8 and the mounting hole 11 to support the rotation of the joint 8, and the bearing assembly 3 is close to the mounting hole 11;
[0048] The blocking clamp 7 includes two semi-circular clamp bodies 71, which are clamped to one end of the housing 1 near the opening of the mounting hole 11. The blocking clamp 7 can be opened or closed. The blocking clamp 7 is provided with a radially extending blocking edge 711, which extends and covers part of the end face of the opening of the mounting hole 11.
[0049] In one embodiment, multiple bearings 31 are provided, and a gasket 4 and a retaining ring 5 are provided between two adjacent bearings 31. Figure 1 The structure consists of two bearings 31. The retaining ring 5 is embedded in the outer wall of the connector 8 and closely adheres to the outer ring of each of the two adjacent bearings 31, while the gasket 4 is closely adhered to the inner ring of each of the two adjacent bearings 31. The retaining ring 5 can be a spring retaining ring or a wire retaining ring, etc.
[0050] It should be noted that during the operation of the pneumatic rotary joint 8, the failure of the shaft retaining ring 2 may cause the bearing 31 to fall off the shaft end of the joint 8. By setting a retaining ring 5 between two adjacent bearings 31, the bearing 31 can be prevented from falling off the shaft end of the joint 8 after the failure of the shaft retaining ring 2, thus keeping it in the housing 1 and eliminating the potential for failure.
[0051] Specifically, in the bearing assembly 3, the outer ring of the bearing 31 closest to the blocking clamp 7 is fitted with a retaining ring 6 for the hole, which is embedded in the inner wall of the mounting hole 11; in the bearing assembly 3, the inner ring of the bearing 31 furthest from the blocking clamp 7 is fitted with a retaining ring 2 for the shaft, which is embedded in the outer wall of the joint 8.
[0052] Understandably, when the retaining ring 6 fails, the connector 8, gasket 4, bearing 31, and shaft retaining ring 2 assembly will detach from the housing 1, causing the machine tool to malfunction. Adding a retaining clamp 7 can solve the aforementioned problems caused by the failure of the retaining ring 6.
[0053] In one embodiment, refer to Figure 2 As shown, to facilitate the opening or closing of the clamping clamp 7, one end of each of the two clamping clamp bodies 71 is hinged by a hinge 72, and the other end of each of the two clamping clamp bodies 71 is provided with a connector 73, which is used to open or close the two clamping clamp bodies 71. The connector 73 can be a locking screw or a bolt; in addition, the other end of each of the two clamping clamp bodies 71 extends with a connecting edge 74 to facilitate the installation of the connector 73.
[0054] By setting up a blocking clamp 7 including clamp body 71, hinge 72, and connector 73 (locking screw), after the locking screw is loosened or tightened, clamp body 71 can be freely opened or closed by hinge 72.
[0055] In other embodiments, each of the two clamp bodies 71 has connecting edges 74 extending at both ends for interconnection, which can be connected by locking screws or bolts.
[0056] In one embodiment, refer to Figure 1 , Figure 3 As shown, the housing 1 has a boss 12 extending radially at one end near the opening of the mounting hole 11, and the clamp body 71 is provided with a clamping groove 75 that mates with the boss 12.
[0057] In one embodiment, the projection of the blocking edge 711 toward the bearing assembly 3 at least covers the retaining ring 6 for the bore.
[0058] Understandably, the blocking clamp 7 is provided with a radially extending blocking edge 711, the projection of which at least covers the location of the hole retaining ring 6, forming an effective anti-detachment structure, preventing the internal components of the mounting hole 11 from leaking out or falling off when the clamp is tightened.
[0059] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, 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 and substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A blocking structure for a pneumatic rotary joint, characterized in that, include: The housing (1) is provided with mounting holes (11); The connector (8) is rotatably connected to the mounting hole (11); The bearing assembly (3) includes at least one bearing (31) mounted between the joint (8) and the mounting hole (11) to support the rotation of the joint (8), the bearing assembly (3) being close to the mounting hole (11). The blocking clamp (7) includes two semi-circular clamp bodies (71), which are clamped to one end of the housing (1) near the opening of the mounting hole (11). The blocking clamp (7) can be opened or closed. The blocking clamp (7) is provided with a radially extending blocking edge (711), which extends and covers part of the end face of the opening of the mounting hole (11).
2. The blocking structure of a pneumatic rotary joint according to claim 1, characterized in that, Multiple bearings (31) are provided, and a gasket (4) and a retaining ring (5) are provided between two adjacent bearings (31).
3. The blocking structure of a pneumatic rotary joint according to claim 1, characterized in that, The outer ring of the bearing (31) closest to the blocking clamp (7) in the bearing assembly (3) is provided with a retaining ring (6) for the hole, and the retaining ring (6) for the hole is embedded in the inner side wall of the mounting hole (11). The inner ring of the bearing (31) furthest from the blocking clamp (7) in the bearing assembly (3) is fitted with a shaft retaining ring (2), which is embedded in the outer wall of the joint (8).
4. The blocking structure of a pneumatic rotary joint according to claim 2, characterized in that, The blocking ring (5) is embedded on the outer wall of the joint (8) and closely attached to the outer ring of each of the two adjacent bearings (31), and the gasket (4) is closely attached to the inner ring of each of the two adjacent bearings (31).
5. The blocking structure of a pneumatic rotary joint according to claim 2, characterized in that, The retaining ring (5) includes a spring retaining ring or a wire retaining ring.
6. The blocking structure of a pneumatic rotary joint according to claim 3, characterized in that, The projection of the blocking edge (711) toward the bearing assembly (3) at least covers the retaining ring (6) for the hole.
7. The blocking structure of a pneumatic rotary joint according to claim 1, characterized in that, One end of each of the two clamp bodies (71) is hinged by a hinge (72), and the other end of each of the two clamp bodies (71) is provided with a connector (73), which is used to open or close the two clamp bodies (71).
8. The blocking structure of a pneumatic rotary joint according to claim 7, characterized in that, The connector (73) includes a locking screw or bolt.
9. The blocking structure of a pneumatic rotary joint according to claim 1, characterized in that, Each of the two clamp bodies (71) has a connecting edge (74) extending from one and / or both ends for interconnection.
10. The blocking structure of a pneumatic rotary joint according to claim 1, characterized in that, The housing (1) has a boss (12) extending radially at one end near the opening of the mounting hole (11), and the clamp body (71) is provided with a locking groove (75) that mates with the boss (12).