Airflow transmission device

Abstract

The utility model relates to an airflow transmission device which comprises a first support, two first limiting rings, a second support, a mounting seat and a second limiting ring, the first support is provided with a first through hole, and the two first limiting rings are fixedly mounted at the two ends of the first support respectively; a second through hole is formed in the second support, the second support penetrates through the first support and the first limiting ring, the second support and the first support rotate relatively, and an air cavity is formed between the second support and the first support; the mounting seat is fixedly mounted on the second support and provided with an air hole, and the first through hole, the air cavity, the air hole and the second through hole are sequentially communicated to form an air channel; the number of the second limiting rings is two, the two second limiting rings are connected with the two ends of the mounting base correspondingly, the second supporting base is sleeved with the second limiting rings, and the second limiting rings and the first limiting rings rotate relatively; during inflation, high-pressure gas in the gas cavity forces one end of the second limiting ring to abut against one end of the first limiting ring. The airflow transmission device is good in sealing effect and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of airflow transmission technology, and in particular to an airflow transmission device. Background Technology

[0002] Currently, systems for real-time inflation and deflation of rotating objects are difficult to implement, one limiting factor being the difficulty in transmitting airflow between fixed and rotating components. Patent CN106183657B discloses a device for transmitting airflow between rotating and non-rotating components. It includes a drive shaft with a ball cage as its head and an annular mating disc mounted on the ball cage along the same central axis. The drive shaft rotates relative to the mating disc. The mating disc has a non-rotating air passage radially connected to the outside. The drive shaft has a rotating air passage leading from the ball cage to its outer end, connecting to the outside. A sealed annular inflation chamber is formed at the mating point between the ball cage and the mating disc. The outer circle of the inflation chamber is fixed to the inner wall of the mating disc, and the inner circle of the inflation chamber matches the surface of the ball cage. The inflation chamber communicates with both the non-rotating and rotating air passages. The inflation chamber includes a pair of coaxially arranged first and second sealing rings, which are radially vulcanized and fixed to the upper and lower ends of the inner wall of the annular mating disc. However, the seals are prone to wear and tear and have a short service life when driven at high speeds for extended periods. Utility Model Content

[0003] Therefore, it is necessary to provide an airflow transmission device with a long service life to address the above problems.

[0004] An airflow transmission device is used for inflating and deflating a tire during rotation. The airflow transmission device includes a first support, a first limiting ring, a second support, a mounting base, and a second limiting ring. The first support has a first through hole, and there are two first limiting rings, which are respectively fixedly installed at both ends of the first support. The second support has a second through hole, and the second support passes through the first support and the first limiting ring, allowing the second support to rotate relative to the first support, forming an air cavity between the second support and the first support. The mounting base is fixedly installed on the second support and has an air hole. The first through hole, the air cavity, the air hole, and the second through hole are sequentially connected to form an air passage. There are two second limiting rings, which are respectively connected to both ends of the mounting base. The second limiting rings are sleeved on the second support, and the second limiting rings rotate relative to the first limiting ring. When inflating, the high-pressure gas in the air cavity forces one end of the second limiting ring to abut against one end of the first limiting ring.

[0005] In one embodiment, a gap exists between the second limiting ring and the mounting base to allow gas flow.

[0006] In one embodiment, the system further includes two first sealing rings, which are respectively installed at both ends of the first support, and the first limiting ring is installed on the first sealing ring; the second support passes through the first sealing ring.

[0007] In one embodiment, the first support includes a support portion and two cover portions, the two cover portions respectively covering both ends of the support portion, and the first sealing ring is installed on the inner side of the cover portion; the second support passes through the support portion and the cover portions.

[0008] In one embodiment, a second sealing ring is further included. The second sealing ring is installed on the outer side of the cover plate portion and is used to seal the cover plate portion and the support portion. There are two second sealing rings, and each one corresponds to one of the cover plate portions.

[0009] In one embodiment, a third sealing ring is further included, which is installed on the second limiting ring, and the second support passes through the third sealing ring; the second limiting ring is used to seal the second limiting ring and the second support; there are two third sealing rings, and they correspond one-to-one with the second limiting rings.

[0010] In one embodiment, the mounting base is provided with a plurality of positioning portions around its periphery, and the second limiting ring is provided with a plurality of grooves around its periphery, the grooves corresponding one-to-one with the positioning portions, the grooves being used to accommodate the positioning portions.

[0011] In one embodiment, the end of the first limiting ring near the second limiting ring is a smooth surface, and the end of the second limiting ring near the first limiting ring is a smooth surface.

[0012] In one embodiment, the first through hole is located on one side of the first support; the end of the second through hole away from the air cavity is located on the side and / or end face of the second support.

[0013] In one embodiment, the system further includes a first connector and a second connector, wherein the first connector is mounted on the first support and communicates with the first through hole; and the second connector is mounted on the second support and communicates with the second through hole.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] The airflow transmission device of this utility model achieves airflow transmission between rotating and non-rotating parts by rotating the second support relative to the first support, forming an air passage with the first through hole, air chamber, air hole and second through hole; when inflated, the high pressure gas in the air chamber forces one end of the second limiting ring to abut one end of the first limiting ring, resulting in good sealing effect and long service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly structure of the airflow transmission device shown in the first embodiment of the present invention;

[0017] Figure 2 for Figure 1 A sectional view along line AA.

[0018] Figure 3 for Figure 1 The exploded view of the airflow transmission device shown is provided, in which the first and second connectors are not shown.

[0019] Figure 4 for Figure 1 The diagram shows the inflation state of the airflow transmission device when the first through hole is the air inlet and the second through hole is the air outlet.

[0020] Figure 5 for Figure 1 The diagram shows the air-filling state of the airflow transmission device when the first through hole is the air outlet and the second through hole is the air inlet.

[0021] Figure 6 This is a schematic diagram of the airflow transmission device shown in the second embodiment of the present invention;

[0022] Figure 7 This is a schematic diagram of the airflow transmission device shown in the third embodiment of this utility model.

[0023] The meanings of the numbers in the attached diagram are as follows:

[0024] 100. Airflow transmission device;

[0025] 10. First support; 101. First through hole; 11. Support part; 12. Cover plate part; 20. First limiting ring; 30. Second support; 31. Second through hole; 32. Air cavity; 40. Mounting seat; 401. Air hole; 41. Positioning part; 50. Second limiting ring; 51. Groove; 60. First sealing ring; 70. Second sealing ring; 80. Third sealing ring; 90. First connector; 90a. Second connector;

[0026] 100a. Airflow transmission device;

[0027] 30a, Second support; 301a, Second through hole; 302a, Air cavity;

[0028] 100b. Airflow transmission device;

[0029] 30b, second support; 301b, second through hole. Detailed Implementation

[0030] To make the above-mentioned objects, 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. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0036] Please refer to Figures 1 to 5 This invention relates to an airflow transmission device 100, used for inflating and deflating a tire during rotation. The airflow transmission device 100 includes a first support 10, a first limiting ring 20, a second support 30, a mounting base 40, and a second limiting ring 50. The first support 10 has a first through hole 101. Two first limiting rings 20 are fixedly mounted at opposite ends of the first support 10. The second support 30 has a second through hole 31, through which the first support 10 and the first limiting ring 20 pass. The second support 30 rotates relative to the first support 10. An air cavity 32 is formed between the support 30 and the first support 10; the mounting base 40 is fixedly installed on the second support 30, and the mounting base 40 is provided with an air hole 401. The first through hole 101, the air cavity 32, the air hole 401 and the second through hole 31 are connected in sequence to form an air passage; there are two second limiting rings 50, which are respectively connected to the two ends of the mounting base 40. The second limiting rings 50 are sleeved on the second support 30, and the second limiting rings 50 and the first limiting ring 20 rotate relative to each other; when inflated, the high-pressure gas in the air cavity 32 forces one end of the second limiting ring 50 to abut one end of the first limiting ring 20. This airflow transmission device 100 rotates relative to the first support 10 via the second support 30. The first through hole 101, air chamber 32, air hole 401 and the second through hole 31 form an air passage, thereby realizing the transmission of airflow between the rotating and non-rotating parts. When inflated, the high-pressure gas in the air chamber 32 forces one end of the second limiting ring 50 to abut one end of the first limiting ring 20, resulting in a good sealing effect and a long service life.

[0037] Example 1:

[0038] like Figures 1 to 3 As shown, in this embodiment, the first support 10 is provided with a first through hole 101. Optionally, the first through hole 101 is provided on one side of the first support 10. The first support 10 includes a support portion 11 and two cover portions 12, which are respectively covered on both ends of the support portion 11. Further, the first through hole 101 is provided on the side of the support portion 11. The cover portion 12 is provided with a slot (not shown in the figure). The cover portion 12 and the support portion 11 are fixed by screws.

[0039] like Figure 2 and Figure 3 As shown, there are two first limiting rings 20, which are fixedly installed at both ends of the first support 10; optionally, the first limiting rings 20 are installed on the cover plate 12.

[0040] Please check again. Figures 1 to 3 The second support 30 is provided with a second through hole 31. The first support 10 and the first limiting ring 20 pass through the second support 30. The second support 30 and the first support 10 rotate relative to each other, forming an air cavity 32 between the second support 30 and the first support 10. The second support 30 is provided with a support part 11 and a cover part 12. When the first through hole 101 is an air inlet, the second through hole 31 is an air outlet. At this time, one end of the first through hole 101 is connected to the air pump, and the other end is connected to the air cavity 32. One end of the second through hole 31 is connected to the air cavity 32, and the other end is connected to the component to be inflated. The first support 10 is fixedly installed, and the second support 30 is rotatably installed. Optionally, the end of the second through hole 31 away from the air cavity 32 is located on the side of the second support 30. Further, there can be one or more second through holes 31.

[0041] like Figure 2 and Figure 3 As shown, the mounting base 40 is fixedly installed on the second support 30. The mounting base 40 is provided with an air hole 401. The first through hole 101, the air chamber 32, the air hole 401 and the second through hole 31 are connected in sequence to form an air passage. Optionally, multiple positioning parts 41 are provided around the periphery of the mounting base 40.

[0042] Please check again. Figure 2 and Figure 3There are two second limiting rings 50, each connected to one end of the mounting base 40. The second limiting rings 50 are fitted onto the second support 30, and rotate relative to the first limiting ring 20. Optionally, a gap exists between the second limiting ring 50 and the mounting base 40 to allow gas flow. When not inflated, this gap prevents friction between the second limiting ring 50 and the first limiting ring 20, thus improving their service life. The gap between the second limiting ring 50 and the first limiting ring 20 is smaller than the gap between the second limiting ring 50 and the mounting base 40. Furthermore, both the end of the first limiting ring 20 near the second limiting ring 50 and the end of the second limiting ring 50 near the first limiting ring 20 are smooth surfaces to reduce friction between them. In one embodiment, the second limiting ring 50 has a plurality of grooves 51 around its periphery, and the grooves 51 correspond one-to-one with the positioning part 41. The grooves 51 are used to accommodate the positioning part 41 to prevent the second limiting ring 50 from rotating relative to the mounting base 40. Furthermore, the inner side of the second limiting ring 50 is provided with a receiving groove (not shown in the figure).

[0043] When inflated, the high-pressure gas in the air chamber 32 forces one end of the second limiting ring 50 to abut one end of the first limiting ring 20, ensuring a tight seal between the second limiting ring 50 and the first limiting ring 20. During use, the high-pressure gas flows through the gap between the second limiting ring 50 and the mounting base 40, thereby forcing the second limiting ring 50 to move along the length of the second support 30 and the positioning part 41 until one end of the second limiting ring 50 abuts one end of the first limiting ring 20.

[0044] like Figure 2 and Figure 3 As shown, the airflow transmission device 100 further includes two first sealing rings 60, which are respectively installed at both ends of the first support 10. A first limiting ring 20 is installed on the first sealing ring 60; the second support 30 passes through the first sealing ring 60. The first sealing ring 60 seals the first limiting ring 20 and the first support 10, thereby improving the sealing performance. Optionally, the first sealing ring 60 is installed on the inner side of the cover plate portion 12.

[0045] In one embodiment, the airflow transmission device 100 further includes a second sealing ring 70, which is installed on the outside of the cover plate portion 12. The second sealing ring 70 is used to seal the cover plate portion 12 and the support portion 11 to improve air tightness. There are two second sealing rings 70, which correspond one-to-one with the cover plate portion 12. Optionally, the second sealing ring 70 is accommodated in a slot.

[0046] Please check again. Figure 2 and Figure 3The airflow transmission device 100 also includes a third sealing ring 80, which is installed on the second limiting ring 50, and the third sealing ring 80 passes through the second support 30. The second limiting ring 50 is used to seal the second limiting ring 50 and the second support 30 to improve airtightness. There are two third sealing rings 80, which correspond one-to-one with the second limiting ring 50. Optionally, the third sealing ring 80 is housed in a receiving groove. During inflation, the high-pressure gas in the air chamber 32 forces the third sealing ring 80 and the second limiting ring 50 to move synchronously.

[0047] like Figure 1 and Figure 2 As shown, the airflow transmission device 100 further includes a first connector 90 and a second connector 90a. The first connector 90 is installed on the first support 10 and is connected to the first through hole 101. The second connector 90a is installed on the second support 30 and is connected to the second through hole 31. Optionally, one end of the first connector 90 is connected to the air pipe and the other end is connected to the first through hole 101, and one end of the second connector 90a is connected to the air pipe and the other end is connected to the second through hole 31.

[0048] In one embodiment, gaps are provided between the cover plate portion 12 and the second support 30, between the first sealing ring 60 and the second support 30, between the first limiting ring 20 and the second support 30, and between the second limiting ring 50 and the second support 30, in order to reduce friction and reduce frictional heat generation.

[0049] like Figure 4 As shown, when the first through hole 101 is an air inlet, the second through hole 31 is an air outlet. The first support 10 is fixed, and the second support 30 is rotatable. As the second support 30 rotates, the mounting base 40 and the second limiting ring 50 rotate synchronously. When not inflated, there is a gap between the second limiting ring 50 and the first limiting ring 20 to avoid friction between them and improve their service life. During inflation, high-pressure gas enters the air chamber 32 through the first through hole 101, then enters the second through hole 31 through the air hole 401, and is then discharged to the part to be inflated, achieving inflation while rotating. At the same time, the high-pressure gas in the air chamber 32 flows through the gap between the second limiting ring 50 and the mounting base 40, thereby forcing the second limiting ring 50 to move along the length direction of the second support 30 and the positioning part 41. The second limiting ring 50 drives the third sealing ring 80 to move synchronously until one end of the second limiting ring 50 abuts against one end of the first limiting ring 20, resulting in a good sealing effect.

[0050] like Figure 5As shown, when the first through hole 101 is the air outlet, the second through hole 31 is the air inlet. At this time, the first support 10 is rotatable and the second support 30 is fixed. When inflating, the high-pressure gas enters the air chamber 32 through the second through hole 31, then enters the first through hole 101 through the air hole 401, and is then discharged to the part to be inflated.

[0051] Implementation 2:

[0052] Please see Figure 6 This is the airflow transmission device 100a of the second embodiment of the present invention. This embodiment is similar to the airflow transmission device 100 of the first embodiment, except that the end of the second through hole 301a away from the air cavity 302a is provided on the end face of the second support 30a. Optionally, there are multiple second through holes 301a.

[0053] Implementation Three:

[0054] Please see Figure 7 This is the airflow transmission device 100b of the third embodiment of the present invention. This embodiment is similar to the airflow transmission device 100 of the first embodiment, except that the end face and side face of the second support 30b in this embodiment are provided with second through holes 301b.

[0055] The airflow transmission device 100 of this utility model rotates relative to the first support 10 via the second support 30. The first through hole 101, the air chamber 32, the air hole 401 and the second through hole 31 form an air passage, thereby realizing the transmission of airflow between the rotating and non-rotating parts. When inflated, the high-pressure gas in the air chamber 32 forces one end of the second limiting ring 50 to abut one end of the first limiting ring 20, resulting in a good sealing effect and a long service life.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas flow transmission device for inflating and deflating a tire during rotation of the tire, characterized by, The airflow transmission device comprises a first support, a first limiting ring, a second support, a mounting seat and a second limiting ring, the first support is provided with a first through hole, the first limiting ring is two, and the two first limiting rings are fixedly installed at two ends of the first support respectively; the second support is provided with a second through hole, the second support penetrates the first support and the first limiting ring, the second support is relatively rotatable with the first support, and an air cavity is formed between the second support and the first support; the mounting seat is fixedly installed on the second support, and the mounting seat is provided with an air hole, the first through hole, the air cavity, the air hole and the second through hole are sequentially communicated to form an air channel; the second limiting ring is two, and the two second limiting rings are connected to two ends of the mounting seat respectively, the second limiting ring is sleeved on the second support, and the second limiting ring is relatively rotatable with the first limiting ring; when inflated, the high-pressure gas in the air cavity forces one end of the second limiting ring to abut against one end of the first limiting ring.

2. The airflow transport device of claim 1, wherein, There is a gap between the second limiting ring and the mounting seat for gas flow.

3. The airflow transport device of claim 1, wherein, Two first sealing rings are further included, the two first sealing rings are respectively installed at two ends of the first support, and the first limiting ring is installed on the first sealing ring; the second support penetrates the first sealing ring.

4. The airflow transport device of claim 3, wherein, The first support comprises a support part and two cover plate parts, the two cover plate parts are respectively covered on two ends of the support part, and the first sealing ring is installed on the inner side of the cover plate part; the second support penetrates the support part and the cover plate part.

5. The airflow transport device of claim 4, wherein, A second sealing ring is further included, the second sealing ring is installed on the outer side of the cover plate part, and the second sealing ring is used for sealing the cover plate part and the support part; the second sealing ring is two, and corresponds to the cover plate part one by one.

6. The airflow transport device of claim 1, wherein, A third sealing ring is further included, the third sealing ring is installed on the second limiting ring, and the second support penetrates the third sealing ring; the second limiting ring is used for sealing the second limiting ring and the second support; the third sealing ring is two, and corresponds to the second limiting ring one by one.

7. The airflow transport device of claim 1, wherein, A plurality of positioning parts are arranged on the periphery of the mounting seat, a plurality of grooves are arranged on the periphery of the second limiting ring, the grooves correspond to the positioning parts one by one, and the grooves are used for accommodating the positioning parts.

8. The airflow transport device of claim 1, wherein, One end of the first limiting ring close to the second limiting ring is a smooth surface, and one end of the second limiting ring close to the first limiting ring is a smooth surface.

9. The airflow transport device of claim 1, wherein, The first through hole is arranged on one side of the first support; and one end of the second through hole away from the air cavity is arranged on the side surface and / or end surface of the second support.

10. The airflow transport device of claim 1, wherein, A first connector and a second connector are further included, the first connector is installed on the first support, and the first connector communicates with the first through hole; the second connector is installed on the second support, and the second connector communicates with the second through hole.

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