Sealing element, joint sealing structure of cleaning robot and cleaning robot
By designing a seal with a lip-shaped elastic part, the problem that existing seals are difficult to take into account both protective performance and easy cleaning in medical scenarios is solved, and high sealing and easy cleaning are achieved, ensuring the realization of cleanliness and sterility requirements.
Patent Information
- Application Number
- CN202422166363.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-04
AI Technical Summary
Existing seals are difficult to take into account high protection performance and easy cleaning in pharmaceutical scenarios, resulting in difficult to achieve cleanliness and sterility requirements, and long-term use can easily lead to wear and seal failure.
A seal is designed, and the sealing ring body is provided with a lip-shaped elastic part protruding toward the circumferential and end sides. The angle between the outer side of the sealing ring body and the outer side of the lip-shaped elastic part is greater than 90°, avoiding the formation of a narrow concave structure and facilitates observation and cleaning.
It improves the sealing property of the seal, prevents external substances from infiltration and internal lubricant leakage, and maintains the rotational coordination of the clean robot joints, extending the service life of the seal.
Smart Images
Figure CN222977413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of food and drug packaging machinery and equipment, and particularly relates to a seal, a clean robot joint seal structure and a clean robot. Background Technique
[0002] In the pharmaceutical scenario, high cleanliness and sterility requirements are put forward for pharmaceutical equipment. Starting from these two requirements, the following specific requirements for the equipment can be transformed. First, the equipment is required to have high protection performance and be able to withstand common sterilization behaviors in the pharmaceutical industry. The most common sterilization method is steam moist heat sterilization, and this sterilization method requires the equipment to be able to withstand the erosion of high-concentration hydrogen peroxide. Second, the equipment is required to be easily cleanable and be able to clean dust, bacteria, water droplets, dirt, etc. on the equipment in a timely and effective manner. The generation of these substances will bring great risks to the pharmaceutical production process.
[0003] All the existing seals on the market without exception adopt grooves or other concave features, such as Figure 1 . The main reason for them to adopt this feature is that the concave structure is a most convenient scheme to provide tension force. This tension force enables the seal to be in close contact with the workpiece surface without gaps, thus ensuring no leakage and sealing effectiveness. However, this groove or other concave feature is not applicable to the pharmaceutical scenario because its structural feature conflicts with easy cleanability. If it cannot be cleaned thoroughly, it will accumulate dirt. The long-term use of this structure will bring great uncontrollable risks to the pharmaceutical process.
[0004] In addition, when the workpiece moves relative to the seal under the condition that the seal is in close contact with the workpiece, dry friction will occur, resulting in wear of the workpiece or the seal. The wear will cause the generation of unclean particles, polluting the pharmaceutical production environment. At the same time, the dry friction causes the temperature of the workpiece and the seal to rise. The seal material is generally a non-metallic material, and dry friction at high temperatures will quickly cause the seal to be damaged. Therefore, the existing solution is to apply a lubricant on the surfaces of the seal and the workpiece to reduce the friction coefficient and ensure the long-term use of the seal, as shown in Figure 2 . As mentioned above, steam moist heat sterilization is commonly used in pharmaceutical production, and in order to ensure cleanliness, the equipment is often cleaned in the pharmaceutical scenario. These two conventional measures in pharmaceutical production will wash away the lubricant, resulting in the failure of the friction reduction scheme and ultimately the failure of the sealing scheme, and there is a risk of external leakage of dirt inside the equipment. Content of the Utility Model
[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a seal, a clean robot joint seal structure and a clean robot that are convenient for observation and cleaning and improve the sealing performance.
[0006] To solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A seal, comprising a sealing ring body, wherein the sealing ring body is provided with a lip-shaped elastic part protruding outwardly to the circumferential side and the end side, and the included angle β between the outer side surface of the sealing ring body and the outer side surface of the lip-shaped elastic part is greater than 90°.
[0008] As a further improvement of the above technical solution:
[0009] The lip-shaped elastic part is connected to the edge at one end of the sealing ring body.
[0010] The outer side surface of the sealing ring body and the outer side surface of the lip-shaped elastic part are connected by an arc surface.
[0011] The included angle θ between the end face of the sealing ring body and the inner side surface of the lip-shaped elastic part is greater than 90°.
[0012] The sealing ring body and the lip-shaped elastic part are integrally formed.
[0013] The end face of the lip-shaped elastic part away from the sealing ring body is a plane.
[0014] A joint sealing structure of a cleaning robot, comprising a first arm, a second arm and the above-mentioned seal, wherein the first arm and the second arm are rotatably connected, the sealing ring body abuts against the second arm, the lip-shaped elastic part abuts tightly against the first arm for sealing, and the sealing ring body, the lip-shaped elastic part and the first arm enclose a fitting interval.
[0015] As a further improvement of the above technical solution:
[0016] The first arm is provided with a wear-resistant disc, the lip-shaped elastic part abuts tightly against the wear-resistant disc for sealing, and the fitting interval is enclosed by the sealing ring body, the lip-shaped elastic part and the wear-resistant disc.
[0017] The first arm and the second arm are rotatably connected through a rotating shaft, the wear-resistant disc is clamped on the first arm and is coaxial with the rotating shaft, and the sealing ring body is clamped on the second arm and is coaxial with the rotating shaft.
[0018] A cleaning robot, comprising the above-mentioned joint sealing structure of the cleaning robot.
[0019] Compared with the prior art, the advantages of the present utility model are as follows:
[0020] For the seal of the present utility model, during use, the seal is arranged at the rotational connection (the moving joint part) between the first arm and the second arm of the clean robot joint, such that the sealing ring body abuts against the second arm, and the lip-shaped elastic part tightly abuts against and seals the first arm. The sealing ring body, the lip-shaped elastic part, and the first arm enclose a fitting interval. On the one hand, the included angle β between the outer side surface of the sealing ring body and the outer side surface of the lip-shaped elastic part is greater than 90°, avoiding the formation of a narrow and deep concave structure, which is convenient for observation and cleaning. On the other hand, the rotational connection between the first arm and the second arm is sealed and connected by this seal, which not only improves the sealing performance, preventing external substances from infiltrating into the interior and internal lubricants from leaking out, but also does not affect the rotational fit between the first arm and the second arm.
[0021] For the seal structure of the clean robot joint of the present utility model, on the one hand, the included angle β between the outer side surface of the sealing ring body and the outer side surface of the lip-shaped elastic part is greater than 90°, avoiding the formation of a narrow and deep concave structure, which is convenient for observation and cleaning. On the other hand, the rotational connection between the first arm and the second arm is sealed and connected by this seal, which not only improves the sealing performance, preventing external substances from infiltrating into the interior and internal lubricants from leaking out, but also does not affect the rotational fit between the first arm and the second arm. On the third hand, the sealing ring body, the lip-shaped elastic part, and the first arm enclose a fitting interval, which is convenient for the lip-shaped elastic part to expand and deform outward when being squeezed, improving the pressing force against the first arm and being beneficial to improving the sealing performance.
[0022] The clean robot of the present utility model includes the seal structure of the clean robot joint and has all the advantages of the seal structure of the clean robot joint. Description of the Drawings
[0023] Figure 1 are three schematic structural diagrams of the existing seal.
[0024] Figure 2 is a schematic structural diagram of the cooperation between the existing seal and the workpiece.
[0025] Figure 3 is a schematic three-dimensional structural diagram of the seal of the present utility model.
[0026] Figure 4 is a schematic main sectional structural diagram of the seal of the present utility model.
[0027] Figure 5 is Figure 4 an enlarged structural diagram of part A in
[0028] Figure 6 is a schematic structural diagram of the seal structure of the clean robot joint of the present utility model.
[0029] Each label in the figure represents:
[0030] 1. Sealing ring body; 2. Lip-shaped elastic part; 3. Arc surface; 4. First arm; 5. Second arm; 6. Rotating shaft; 7. Fitting interval; 8. Wear-resistant disc. Detailed implementation mode
[0031] The following further elaborates on the present utility model in conjunction with the attached drawings of the specification and specific embodiments.
[0032] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present utility model.
[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0034] In the present utility model, unless otherwise clearly specified and limited, terms such as "assembly", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0035] Embodiment 1:
[0036] Figures 3 to 5 An embodiment of the seal of the present utility model is shown. The seal of this embodiment includes a sealing ring body 1. A lip-shaped elastic part 2 protruding outward to the circumferential side and end side is provided on the sealing ring body 1. The included angle β between the outer side surface of the sealing ring body 1 and the outer side surface of the lip-shaped elastic part 2 is greater than 90°.
[0037] During use, the seal is arranged at the rotational connection (the moving joint part) between the first arm 4 and the second arm 5 of the clean robot joint, such that the sealing ring body 1 abuts against the second arm 5, and the lip-shaped elastic part 2 tightly abuts against and seals the first arm 4. The sealing ring body 1, the lip-shaped elastic part 2 and the first arm 4 enclose a mating space 7. On the one hand, the included angle β between the outer side surface of the sealing ring body 1 and the outer side surface of the lip-shaped elastic part 2 is greater than 90°, avoiding the formation of a narrow and deep concave structure, which is convenient for observation and cleaning. On the other hand, the rotational connection between the first arm 4 and the second arm 5 is sealed by this seal, which not only improves the sealing performance, preventing external substances from infiltrating into the interior and internal lubricant from leaking out, but also does not affect the rotational fit between the first arm 4 and the second arm 5.
[0038] Furthermore, in this embodiment, the lip-shaped elastic part 2 is connected to the edge of one end of the sealing ring body 1. Specifically, the lip-shaped elastic part 2 is connected to the outer peripheral edge of one end of the sealing ring body 1.
[0039] Furthermore, as Figure 5 shown, in this embodiment, the outer side surface of the sealing ring body 1 and the outer side surface of the lip-shaped elastic part 2 are connected by an arc surface 3. The arc surface 3 is convenient for cleaning and avoids the formation of a cleaning dead angle between the outer side surface of the sealing ring body 1 and the outer side surface of the lip-shaped elastic part 2.
[0040] Furthermore, in this embodiment, the included angle θ between the end face of the sealing ring body 1 and the inner side surface of the lip-shaped elastic part 2 is greater than 90°.
[0041] Furthermore, in this embodiment, the sealing ring body 1 and the lip-shaped elastic part 2 are integrally formed. That is to say, there are no included angles less than 90° both inside and outside the seal, which is convenient for cleaning the seal. Preferably, the sealing ring body 1 and the lip-shaped elastic part 2 are made of the existing polytetrafluoroethylene material.
[0042] Furthermore, as Figure 4 shown, in this embodiment, the end face of the lip-shaped elastic part 2 away from the sealing ring body 1 is a plane. This is beneficial for tightly abutting and sealing with the external structure.
[0043] Embodiment Two:
[0044] Figure 6 An embodiment of the joint sealing structure of the clean robot of the present invention is shown. The joint sealing structure of the clean robot in this embodiment includes a first arm 4, a second arm 5 and the seal of Embodiment One. The first arm 4 and the second arm 5 are rotationally connected. The sealing ring body 1 abuts against the second arm 5, the lip-shaped elastic part 2 tightly abuts against and seals the first arm 4, and the sealing ring body 1, the lip-shaped elastic part 2 and the first arm 4 enclose a mating space 7.
[0045] On the one hand, the included angle β between the outer side surface of the sealing ring body 1 and the outer side surface of the lip-shaped elastic part 2 is greater than 90°, avoiding the formation of a narrow and deep concave structure, which is convenient for observation and cleaning. On the other hand, the rotating connection part of the first arm 4 and the second arm 5 is hermetically connected by this seal, which not only improves the sealing performance, prevents external substances from infiltrating into the interior and the leakage of internal lubricant, but also does not affect the rotational cooperation between the first arm 4 and the second arm 5. On the third hand, a fitting interval 7 is formed among the sealing ring body 1, the lip-shaped elastic part 2 and the first arm 4, which is convenient for the lip-shaped elastic part 2 to expand and deform outward when being extruded, improving the pressing force against the first arm 4 and being beneficial to improving the sealing performance. In addition, when the pressure in the external environment where the cleaning robot is located increases, after the sealing ring body 1 is pressured and the lip-shaped elastic part 2 is pressed against the first arm 4, the fitting interval 7 can provide additional space for the lip-shaped elastic part 2 to be pressed against the first arm 4, increasing the fitting surface between the lip-shaped elastic part 2 and the first arm 4 and improving the sealing effect.
[0046] Further, in this embodiment, a wear-resistant disc 8 is provided on the first arm 4, and the lip-shaped elastic part 2 is pressed against and sealed with the wear-resistant disc 8, and the fitting interval 7 is formed by the sealing ring body 1, the lip-shaped elastic part 2 and the wear-resistant disc 8. The first arm 4 is in contact with the seal through the wear-resistant disc 8, improving the wear resistance and thus the service life.
[0047] Further, in this embodiment, the first arm 4 and the second arm 5 are rotatably connected by a rotating shaft 6. The wear-resistant disc 8 is clamped on the first arm 4 and is coaxial with the rotating shaft 6, and the sealing ring body 1 is clamped on the second arm 5 and is coaxial with the rotating shaft 6.
[0048] Embodiment Three:
[0049] A cleaning robot includes the cleaning robot joint sealing structure of Embodiment Two. This cleaning robot includes the cleaning robot joint sealing structure, having all the advantages of the cleaning robot joint sealing structure and being able to be used in special environments such as hydrogen peroxide sterilization.
[0050] Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the above-disclosed technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall fall within the scope of protection of the technical solution of the present utility model.
Claims
1. A seal, comprising a sealing ring body (1), characterized in that: The sealing ring body (1) is provided with a lip-shaped elastic portion (2) protruding outwardly toward the circumferential side and the end side, and the intersection angle β between the outer side surface of the sealing ring body (1) and the outer side surface of the lip-shaped elastic portion (2) is greater than 90°.
2. The seal according to claim 1, characterized in that: The lip-shaped elastic portion (2) is connected to the edge of one end of the sealing ring body (1).
3. The seal according to claim 1, characterized in that: The outer side surface of the sealing ring body (1) and the outer side surface of the lip-shaped elastic portion (2) are connected via an arc surface (3).
4. The seal according to claim 1, characterized in that: The intersection angle θ between the end surface of the sealing ring body (1) and the inner surface of the lip-shaped elastic portion (2) is greater than 90°.
5. The seal according to claim 1, characterized in that: The sealing ring body (1) and the lip-shaped elastic portion (2) are integrally formed.
6. The sealing element according to any one of claims 1 to 5, characterized in that: The end surface of the lip-shaped elastic portion (2) away from the sealing ring body (1) is a plane.
7. A joint sealing structure of a clean robot, characterized in that: The invention comprises a first arm (4), a second arm (5) and a seal according to any one of claims 1 to 6, wherein the first arm (4) and the second arm (5) are rotatably connected, the sealing ring body (1) abuts against the second arm (5), the lip-shaped elastic portion (2) and the first arm (4) abut against each other for sealing, and the sealing ring body (1), the lip-shaped elastic portion (2) and the first arm (4) form a fitting gap (7).
8. The cleaning robot joint sealing structure according to claim 7, characterized in that: The first arm (4) is provided with a wear-resistant disc (8), the lip-shaped elastic portion (2) and the wear-resistant disc (8) are tightly sealed, and the matching interval (7) is surrounded by the sealing ring body (1), the lip-shaped elastic portion (2) and the wear-resistant disc (8).
9. The cleaning robot joint sealing structure according to claim 8, characterized in that: The first arm (4) and the second arm (5) are rotatably connected via a rotating shaft (6); the wear-resistant disc (8) is clamped on the first arm (4) and is coaxial with the rotating shaft (6); and the sealing ring body (1) is clamped on the second arm (5) and is coaxial with the rotating shaft (6).
10. A cleaning robot, characterized in that: The clean robot joint sealing structure comprises the one described in any one of claims 7 to 9.