Airflow transmission device

Abstract

The invention relates to an airflow transmission device which comprises a first support, two first limiting rings, a second support, a mounting seat and second limiting rings, 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] The present invention relates to the technical field of air flow transmission, and in particular to an air flow transmission device. Background Art

[0002] At present, it is difficult to realize a system for real-time inflation and deflation of rotating objects, and one of the limiting factors is that it is difficult to realize the transmission of airflow between fixed parts and rotating parts. The invention patent with announcement number CN106183657B discloses a device for realizing airflow transmission between rotating parts and non-rotating parts, including a transmission shaft with a ball cage as the head and an annular matching disk coaxially sleeved on the ball cage, the transmission shaft rotates relative to the matching disk, the matching disk is provided with a non-rotating airway communicating with the outside world in the radial direction, the transmission shaft is provided with a rotating airway from the ball cage to the outer end of the shaft to the outside world, a sealed annular inflation chamber is formed at the matching position between the ball cage and the matching disk, the outer circle of the inflation chamber is fixed to the inner wall of the matching disk, and the inner circle of the inflation chamber matches the surface of the ball cage; the inflation chamber is respectively communicated with the non-rotating airway and the rotating airway; the inflation chamber includes a pair of first sealing rings and second sealing rings coaxially arranged in parallel, and the radial outer sides of the first sealing ring and the second sealing ring are correspondingly vulcanized and fixed to the upper and lower ends of the inner wall of the annular matching disk. However, when driving at high speed for a long time, the sealing ring is easy to wear and the service life is short. Summary of the invention

[0003] Based on this, it is necessary to provide an air flow transmission device with a long service life to address the above problems.

[0004] A gas flow transmission device is used for inflating and deflation of a tire during rotation. The gas flow 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, and there are two first limiting rings. The two first limiting rings are fixedly mounted on the two ends of the first support respectively; the second support is provided with a second through hole, and the second support penetrates the first support and the first limiting ring. The second support and the first support rotate relative to each other, 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 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 connected in sequence to form an air passage; there are two second limiting rings, and the two second limiting rings are connected to the two ends of the mounting seat respectively. The second limiting ring is sleeved on the second support, and the second limiting ring rotates 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, there is a gap between the second limiting ring and the mounting seat to allow gas to flow.

[0006] In one of the embodiments, two first sealing rings are further included, wherein 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; and the second support is penetrated by the first sealing ring.

[0007] In one embodiment, the first support includes a support portion and two cover portions, the two cover portions are respectively covered at two 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 portion.

[0008] In one of the embodiments, a second sealing ring is further included, wherein the second sealing ring is installed on the outer side of the cover portion, and the second sealing ring is used to seal the cover portion and the support portion; there are two second sealing rings, and they correspond one-to-one to the cover portion.

[0009] In one of the embodiments, it also includes a third sealing ring, which is installed on the second limiting ring and the second support is penetrated by 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 of the embodiments, a plurality of positioning portions are disposed on the periphery of the mounting seat, and a plurality of grooves are disposed on the periphery of the second limiting ring. The grooves correspond to the positioning portions one by one, and the grooves are used to accommodate the positioning portions.

[0011] In one embodiment, 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.

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

[0013] In one embodiment, it further includes a first joint and a second joint, wherein the first joint is installed on the first support, and the first joint is connected to the first through hole; the second joint is installed on the second support, and the second joint is connected to the second through hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The air flow transmission device of the present invention rotates relative to the first support through the second support, and the first through hole, the air cavity, the air hole and the second through hole form an air channel, thereby realizing the transmission of air flow between the rotating part and the non-rotating part; when inflated, the high-pressure gas in the air cavity forces one end of the second limit ring to abut one end of the first limit ring, so the sealing effect is good and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 for Figure 1 Sectional view along line AA;

[0018] Figure 3 for Figure 1 An exploded view of the air flow transmission device shown, wherein the first joint and the second joint are not shown;

[0019] Figure 4 for Figure 1 A diagram showing an inflated state when the first through hole of the air flow transmission device is an air inlet and the second through hole is an air outlet;

[0020] Figure 5 for Figure 1 A diagram showing an inflated state when the first through hole of the air flow transmission device is an air outlet and the second through hole is an air inlet;

[0021] Figure 6 is a structural schematic diagram of an air flow transmission device shown in a second embodiment of the present invention;

[0022] Figure 7 FIG. 4 is a schematic structural diagram of an air flow transmission device shown in the third embodiment of the present invention.

[0023] The meanings of the numbers in the accompanying drawings are:

[0024] 100. Air flow transmission device;

[0025] 10. first support; 101. first through hole; 11. support portion; 12. cover portion; 20. first limiting ring; 30. second support; 31. second through hole; 32. air cavity; 40. mounting seat; 401. air hole; 41. positioning portion; 50. second limiting ring; 51. groove; 60. first sealing ring; 70. second sealing ring; 80. third sealing ring; 90. first joint; 90a. second joint;

[0026] 100a, air flow transmission device;

[0027] 30a, second support; 301a, second through hole; 302a, air cavity;

[0028] 100b, air flow transmission device;

[0029] 30b, second support; 301b, second through hole. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] Please refer to Figures 1 to 5 , an air flow transmission device 100 of an embodiment of the invention is used for inflating and deflation of tires during rotation. The air flow transmission device 100 includes a first support 10, a first limiting ring 20, a second support 30, a mounting seat 40 and a second limiting ring 50. The first support 10 is provided with a first through hole 101, and there are two first limiting rings 20. The two first limiting rings 20 are respectively fixedly installed at both ends of the first support 10; the second support 30 is provided with a second through hole 31, and the second support 30 penetrates the first support 10 and the first limiting ring 20. The second support 30 rotates relative to the first support 10. An air cavity 32 is formed between the seat 30 and the first support 10; the mounting seat 40 is fixedly mounted on the second support 30, and the mounting seat 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, and the two second limiting rings 50 are respectively connected to the two ends of the mounting seat 40, and the second limiting ring 50 is sleeved on the second support 30, and the second limiting ring 50 rotates relative to the first limiting ring 20; when inflated, the high-pressure gas in the air cavity 32 forces one end of the second limiting ring 50 to abut against one end of the first limiting ring 20. The air flow transmission device 100 rotates relative to the first support 10 through the second support 30, and the first through hole 101, the air cavity 32, the air hole 401 and the second through hole 31 form an air channel, thereby realizing the transmission of air flow between the rotating part and the non-rotating part; when inflated, the high-pressure gas in the air cavity 32 forces one end of the second limit ring 50 to abut against one end of the first limit ring 20, so that the sealing effect is good and the service life is long.

[0037] Embodiment 1:

[0038] like Figures 1 to 3 As shown, in this embodiment, the first support 10 is provided with a first through hole 101, and 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, and the two cover portions 12 are respectively covered at 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 card slot (not marked 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 , and the two first limiting rings 20 are fixedly mounted on two ends of the first support 10 , respectively; optionally, the first limiting ring 20 is mounted on the cover plate portion 12 .

[0040] Please check again Figures 1 to 3 The second support 30 is provided with a second through hole 31. The second support 30 penetrates the first support 10 and the first limiting ring 20. The second support 30 rotates relative to the first support 10, and an air cavity 32 is formed between the second support 30 and the first support 10. The second support 30 penetrates the support portion 11 and the cover portion 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 inflatable part. The first support 10 is fixedly arranged, and the second support 30 is rotatably arranged. Optionally, the end of the second through hole 31 away from the air cavity 32 is arranged on the side of the second support 30; further, the second through hole 31 can be one or more.

[0041] like Figure 2 and Figure 3 As shown, the mounting seat 40 is fixedly mounted on the second support 30 , and the mounting seat 40 is provided with an air hole 401 , and 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; optionally, a plurality of positioning portions 41 are provided around the periphery of the mounting seat 40 .

[0042] Please check again Figure 2 and Figure 3 , there are two second limiting rings 50, the two second limiting rings 50 are connected to the two ends of the mounting seat 40 respectively, the second limiting ring 50 is sleeved on the second support 30, and the second limiting ring 50 and the first limiting ring 20 rotate relatively; optionally, there is a gap between the second limiting ring 50 and the mounting seat 40 for gas flow; when not inflated, there is a gap between the second limiting ring 50 and the first limiting ring 20 to avoid friction between the second limiting ring 50 and the first limiting ring 20, thereby improving the service life of the second limiting ring 50 and the first limiting ring 20; 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 seat 40. Furthermore, one end of the first limiting ring 20 close to the second limiting ring 50 is a smooth surface, and one end of the second limiting ring 50 close to the first limiting ring 20 is a smooth surface to reduce the friction between the second limiting ring 50 and the first limiting ring 20. In one embodiment, a plurality of grooves 51 are provided on the circumference of the second limiting ring 50, and the grooves 51 correspond one-to-one to the positioning portions 41. The grooves 51 are used to accommodate the positioning portions 41 to prevent the second limiting ring 50 from rotating relative to the mounting seat 40; further, an accommodating groove (not marked in the figure) is provided on the inner side of the second limiting ring 50.

[0043] When inflated, the high-pressure gas in the air cavity 32 forces one end of the second limiting ring 50 to abut against one end of the first limiting ring 20, ensuring that the second limiting ring 50 is tightly fitted to the first limiting ring 20, with a good sealing effect. When in use, the high-pressure gas flows through the gap between the second limiting ring 50 and the mounting seat 40, thereby forcing the second limiting ring 50 to move along the length direction of the second support 30 and the positioning portion 41 until one end of the second limiting ring 50 abuts against one end of the first limiting ring 20.

[0044] like Figure 2 and Figure 3 As shown, the air flow transmission device 100 further includes two first sealing rings 60, which are respectively installed at both ends of the first support 10, and the first limiting ring 20 is installed on the first sealing ring 60; the second support 30 is penetrated by the first sealing ring 60. The first limiting ring 20 and the first support 10 are sealed by the first sealing ring 60 to improve 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 air flow transmission device 100 also includes a second sealing ring 70, which is installed on the outer side of the cover portion 12. The second sealing ring 70 is used to seal the cover portion 12 and the support portion 11 to improve air tightness; there are two second sealing rings 70, and they correspond one-to-one to the cover portion 12; optionally, the second sealing ring 70 is accommodated in a card slot.

[0046] Please check again Figure 2 and Figure 3 The present air flow transmission device 100 further includes a third sealing ring 80, which is mounted on the second limiting ring 50 and is passed 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 air tightness; there are two third sealing rings 80, which correspond to the second limiting rings 50 one by one; optionally, the third sealing ring 80 is accommodated in the receiving groove. When inflated, the high-pressure gas in the air cavity 32 forces the third sealing ring 80 to move synchronously with the second limiting ring 50.

[0047] like Figure 1 and Figure 2 As shown, the air flow transmission device 100 also includes a first joint 90 and a second joint 90a. The first joint 90 is installed on the first support 10, and the first joint 90 is connected to the first through hole 101; the second joint 90a is installed on the second support 30, and the second joint 90a is connected to the second through hole 31; optionally, one end of the first joint 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 joint 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 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 a fixed setting, and the second support 30 is a rotatable setting. As the second support 30 rotates, the mounting seat 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, which avoids friction between the second limiting ring 50 and the first limiting ring 20, thereby increasing the service life of the second limiting ring 50 and the first limiting ring 20. During inflation, high-pressure gas enters the air cavity 32 through the first through hole 101, then enters the second through hole 31 through the air hole 401, and is finally discharged to the part to be inflated, thereby achieving inflation while rotating; at the same time, the high-pressure gas in the air cavity 32 flows through the gap between the second limiting ring 50 and the mounting seat 40, thereby forcing the second limiting ring 50 to move along the length direction of the second support 30 and the positioning portion 41, and 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, achieving an excellent sealing effect.

[0050] like Figure 5 As shown, when the first through hole 101 is an air outlet, the second through hole 31 is an air inlet. At this time, the first support 10 is rotatably set and the second support 30 is fixedly set. When inflating, the high-pressure gas enters the air cavity 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] See also Figure 6 , is an 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, in this embodiment, one end of the second through hole 301a away from the air cavity 302a is arranged on the end surface of the second support 30a, and optionally, there are multiple second through holes 301a.

[0053] Implementation three:

[0054] See also Figure 7 , is an 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 the side face of the second support 30b of this embodiment are both provided with a second through hole 301b.

[0055] The air flow transmission device 100 of the present invention rotates relative to the first support 10 through the second support 30, and the first through hole 101, the air cavity 32, the air hole 401 and the second through hole 31 form an air channel, thereby realizing the transmission of air flow between the rotating part and the non-rotating part; when inflated, the high-pressure gas in the air cavity 32 forces one end of the second limit ring 50 to abut against one end of the first limit ring 20, so that the sealing effect is good and the service life is long.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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 above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An air flow transmission device for inflating and deflation of a tire during rotation, characterized in that: The airflow transmission device includes 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, there are two first limiting rings, and the two first limiting rings are fixedly mounted on the two ends of the first support respectively; the second support is provided with a second through hole, the second support passes through the first support and the first limiting ring, the second support and the first support rotate relative to each other, and an air cavity is formed between the second support and the first support; the mounting seat is fixedly mounted on the second support, 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 connected in sequence to form an air channel; there are two second limiting rings, the two second limiting rings are respectively connected to the two ends of the mounting seat, the second limiting ring is sleeved on the second support, and the second limiting ring rotates relative to 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 air flow transmission device according to claim 1, characterized in that: There is a gap between the second limiting ring and the mounting seat for gas flow.

3. The air flow transmission device according to claim 1, characterized in that: It also includes two first sealing rings, which 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 is penetrated by the first sealing ring.

4. The air flow transmission device according to claim 3, characterized in that: The first support includes a support portion and two cover portions, the two cover portions are respectively covered at two 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 portion.

5. The air flow transmission device according to claim 4, characterized in that: It also includes a second sealing ring, which is installed on the outer side of the cover part and is used to seal the cover part and the support part; there are two second sealing rings, which correspond to the cover parts one by one.

6. The air flow transmission device according to claim 1, characterized in that: It also includes a third sealing ring, which is installed on the second limiting ring and the second support is penetrated by 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, which correspond one to one with the second limiting rings.

7. The air flow transmission device according to claim 1, characterized in that: A plurality of positioning parts are arranged on the periphery of the mounting seat, and 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 to accommodate the positioning parts.

8. The air flow transmission device according to claim 1, characterized in that: 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 air flow transmission device according to claim 1, characterized in that: The first through hole is arranged on one side of the first support; and the 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 air flow transmission device according to claim 1, characterized in that: It also includes a first joint and a second joint, the first joint is installed on the first support, and the first joint is connected to the first through hole; the second joint is installed on the second support, and the second joint is connected to the second through hole.

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