CN212219809U

CN212219809U - Inflatable chuck

Info

Publication number: CN212219809U
Application number: CN202020202806.XU
Authority: CN
Inventors: 毛永清; 刘仕谦
Original assignee: Zhuhai Sande Electronics Co ltd
Current assignee: Zhuhai Sande Electronics Co ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-12-25
Anticipated expiration: 2030-02-18

Abstract

The utility model discloses an inflatable chuck, which comprises a chuck main body, a clamping piece, a control piece and an outer sleeve, wherein the outer sleeve is sleeved outside the chuck main body and is axially and movably matched with the chuck main body; the chuck main body is provided with an air inlet end and an air outlet end, and the middle part of the chuck main body is provided with an inflation channel which penetrates through the air inlet end and the air outlet end; the chuck body is provided with a guide groove, the clamping piece is arranged in the guide groove and can control the displacement of the clamping piece in the guide groove at least in the radial direction through the control piece; the inner wall of the outer sleeve is provided with a variable diameter section at least in a partial area, the position of the variable diameter section corresponds to that of the clamping piece, the inner wall of the outer sleeve is provided with a contraction diameter and an expansion diameter which are different in size, and the first working position of the clamping piece is closer to the axis of the chuck body relative to the second working position. The utility model discloses can carry out more reliable tighter to aerifing the chuck, the reliability is higher.

Description

Inflatable chuck

Technical Field

The utility model relates to an aerating device, concretely relates to aerify chuck.

Background

For a pneumatic tire, an air valve needs to be installed on the tire, and when the air pressure of the tire is insufficient, an inflation chuck needs to be butted with the air valve, and the tire is inflated through an inflator pump.

The existing inflation process is as follows: and pressing the outer sleeve to enable the outer sleeve to contract after overcoming the pressure of the spring, enabling the clamping piece to move outwards, inserting the inflating valve into the inflating chuck, loosening the outer sleeve, and clamping the external thread of the inflating valve by the clamping piece inwards in the radial direction under the action of the spring to inflate.

With the existing inflation chuck, when inflating, the elastic force of the spring acts on the clamping piece and generates a radially inward decomposition force, and the valve is clamped by the decomposition force; on the other hand, because the sizes of the threads of the external threads on the valve are small, the threads of the external threads are easily disengaged from the clamping piece under slight external stress, so that the clamping is not tight, and the reliability is poor.

Disclosure of Invention

An object of the utility model is to provide an aerify chuck, the utility model discloses can carry out more reliable tighter to aerifing the chuck, the reliability is higher.

The technical scheme is as follows:

the inflatable chuck comprises a chuck main body, a clamping piece, a control piece and an outer sleeve, wherein the outer sleeve is sleeved outside the chuck main body and is axially and movably matched with the chuck main body; the chuck main body is provided with an air inlet end and an air outlet end, and the middle part of the chuck main body is provided with an inflation channel which penetrates through the air inlet end and the air outlet end; the chuck body is provided with a guide groove, the clamping piece is arranged in the guide groove and can control the displacement of the clamping piece in the guide groove at least in the radial direction through the control piece; the inner wall of the outer sleeve is provided with a diameter-changing section at least in a partial area, the position of the diameter-changing section corresponds to that of the clamping piece, the inner wall of the outer sleeve is provided with a contraction diameter and an expansion diameter which are different in size, the clamping piece is in a first working position when matched with the inner wall of the contraction diameter, the clamping piece is in a second working position when matched with the inner wall of the expansion diameter, and the first working position is closer to the axis of the chuck main body relative to the second working position.

Further, the chuck main part includes inner skleeve and air inlet joint, the inner skleeve is relative and through threaded connection with air inlet joint axial, the guide way is located on this inner skleeve.

Furthermore, the guide grooves are obliquely cut inwards along the outer wall of the chuck body and face the direction of the air outlet end, the number of the guide grooves is two, and the two guide grooves are oppositely arranged on the chuck body.

Furthermore, the control piece is a middle sleeve, guide grooves are arranged on the middle sleeve, and the guide grooves are obliquely cut inwards along the outer wall of the middle sleeve and face the direction of the air inlet end; the clamping piece is matched with the guide groove and the guide groove at the same time.

Furthermore, the chuck comprises an elastic part, the elastic part is arranged between the air inlet end of the chuck body and the middle sleeve, the outer sleeve is sleeved outside the middle sleeve, one side of the outer sleeve is pressed by the middle sleeve, and the other side of the outer sleeve is limited by the chuck body.

Furthermore, the inner wall of the outer sleeve comprises an expansion section, a contraction section and a transition section, the inner diameter of the expansion section is the expansion diameter, the diameter of the contraction section is the contraction diameter, and the inner diameter of the transition section is gradually increased from the contraction section to the transition section.

Furthermore, an inner boss is arranged on the inner wall of one side, close to the air outlet end, of the outer sleeve, a limiting boss is arranged on one side, close to the air outlet end, of the inner boss, a limiting part is arranged at the air outlet end of the chuck main body, and the limiting boss is limited by the limiting part; the inner diameter of one side of the inner boss close to the air inlet end is sharply increased to form the expansion section, and the expansion section is a transition section and a contraction section in sequence along the direction of the air inlet end.

Furthermore, the clamping piece is rod-shaped, the two ends of the clamping piece are guide ends, the middle of the clamping piece is a clamping part, and at least two clamping teeth are formed on one side, facing the inflation channel, of the clamping part.

Furthermore, the clamping piece is provided with a clamping surface, a first surface, a second surface and a third surface, the first surface and the third surface are respectively located on two opposite surfaces of the clamping piece, the second surface and the clamping surface are respectively located on two opposite surfaces of the clamping piece, and at least two clamping teeth are arranged on the clamping surface.

Furthermore, the clamping tooth is provided with a first tooth surface and a second tooth surface, the first tooth surface and the first surface form an included angle of 0-10 degrees, and the first tooth surface and the second surface form an included angle of 50-70 degrees.

The utility model provides a technical scheme has following advantage and effect:

the utility model discloses an internal diameter of the outer sleeve of the chuck of aerifing adopts reducing structure, through the removal of control holder, when the holder matches with the inner wall of shrink diameter, the holder is more close to in the axle center of chuck main part, and press from both sides the inflating valve tight, because the inner wall that the holder was through the outer sleeve at this moment carries on spacingly, the holder fastens very much to the centre gripping of inflating valve, under the condition that receives external force, also can not deviate from the holder easily, the reliability obtains the improvement that is showing very much.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles, principles and effects of the invention.

Unless otherwise specified or defined, the same reference numerals in different figures refer to the same or similar features, and different reference numerals may be used for the same or similar features.

FIG. 1 is an axial cross-sectional view of an inflatable clamp according to a first embodiment of the present invention;

FIG. 2 is an exploded view of an inflation clamp according to a first embodiment of the present invention;

FIG. 3 is a partial cross-sectional view of an inflation collet according to a first embodiment of the present invention;

FIG. 4 is a sectional view A-A of this FIG. 3;

FIG. 5 is a block diagram of an outer sleeve;

FIG. 6 is a block diagram of an inner sleeve;

FIG. 7 is a block diagram of a sleeve according to an embodiment of the present invention;

FIG. 8 is a view of the clamp in a first orientation;

FIG. 9 is a view of the clamp in a second orientation;

fig. 10 is an exploded view of an inflation clip according to a second embodiment of the present invention;

description of reference numerals:

10. the chuck comprises a chuck main body, 11, an inner sleeve, 111, an air inlet end, 112, an air outlet end, 113, an air inflation channel, 114, a guide groove, 115, an expansion section, 116, a contraction section, 117, a transition section, 118, an inner boss, 119, a limit boss, 12, an air inlet joint, 20, a clamping piece, 21, a guide end, 22, a clamping part, 221, a first surface, 222, a second surface, 223, a third surface, 224, a clamping surface, 2241, clamping teeth, 2242, a first tooth surface, 2243, a second tooth surface, 30, a middle sleeve, 31, a guide groove, 40, an outer sleeve, 50, an elastic piece, 60, a clamping ring, 70 and the middle sleeve.

Detailed Description

In order to facilitate an understanding of the invention, specific embodiments thereof will be described in more detail below with reference to the accompanying drawings.

Unless specifically stated or otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In combination with the present technical solution's realistic scene, all technical and scientific terms used herein may also have meanings corresponding to the purpose of realizing the technical solution of the present invention.

As used herein, unless otherwise specified or defined, "first" and "second" … are used merely for name differentiation and do not denote any particular quantity or order.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present.

As used herein, unless otherwise specified or defined, the terms "comprises," "comprising," and "comprising" are used interchangeably to refer to the term "comprising," and are used interchangeably herein.

It is needless to say that technical contents or technical features which are contrary to the object of the present invention or clearly contradict each other should be excluded.

Example one

As shown in fig. 1 to 9, the inflation chuck includes a chuck body 10, a clamping member 20, a middle sleeve 30, an outer sleeve 40 and an elastic member 50, wherein the outer sleeve 40 is sleeved outside the chuck body 10 and is axially movably matched with the chuck body 10, in this embodiment, the control member is the middle sleeve 30; the chuck body 10 has an air inlet end 111 and an air outlet end 112, an inflation channel 113 is arranged in the middle of the chuck body 10, and the inflation channel 113 penetrates through the air inlet end 111 and the air outlet end 112; the chuck body 10 is provided with a guide groove 114, the clamping member 20 is arranged in the guide groove 114, and the displacement of the clamping member 20 in the guide groove 114 at least in the radial direction can be controlled through the middle sleeve 30; at least a partial region of the inner wall of the outer sleeve 40 has a variable diameter section (as shown in fig. 5) corresponding to the position of the clamping member 20, the inner wall of the outer sleeve 40 has a contracted diameter and an expanded diameter with different sizes, the clamping member 20 is in a first working position when being matched with the inner wall of the contracted diameter, the clamping member 20 is in a second working position when being matched with the inner wall of the expanded diameter, and the first working position is closer to the axis of the chuck body 10 than the second working position.

The chuck body 10 includes an inner sleeve 11 and an air inlet connector 12, the inner sleeve 11 is axially opposite to the air inlet connector 12 and is connected with the air inlet connector 12 through threads, and the guide groove 114 is formed on the inner sleeve 11.

As shown in fig. 6, there are two guide slots 114, the guide slots 114 are both obliquely cut inward along the outer wall of the chuck body 10 and face the direction of the gas outlet end 112, and the two guide slots 114 are oppositely arranged on the chuck body 10. As shown in fig. 7, guide grooves 31 are provided on the middle sleeve 30, and the guide grooves 31 are all obliquely cut inwards along the outer wall of the middle sleeve 30 and face the direction of the air inlet end 111; the clamping member 20 is simultaneously engaged with the guide groove 114 and the guide groove 31.

As shown in fig. 8 and 9, the clamping member 20 is a rod, two ends of the clamping member are guide ends 21, the middle of the clamping member is a clamping portion 22, the clamping portion 22 has a clamping surface 224, a first surface 221, a second surface 222 and a third surface 223, the first surface 221 and the third surface 223 are respectively located on two opposite surfaces of the clamping member 20, the second surface 222 and the clamping surface 224 are respectively located on two opposite surfaces of the clamping member 20, at least two clamping teeth 2241 are arranged on the clamping surface 224, and at least three clamping teeth 2241 are formed on one side of the clamping surface 224 facing the inflation channel 113. Each of the teeth 2241 has a first tooth surface 2242 and a second tooth surface 2243, the first tooth surface 2242 forms an included angle of 0 to 10 degrees with the first surface 221, and the first tooth surface 2242 forms an included angle of 50 to 70 degrees with the second surface 222.

In this embodiment, the elastic element 50 is a coil spring, the elastic element 50 is disposed between the air inlet end 111 of the chuck body 10 and the middle sleeve 30, the outer sleeve 40 is sleeved outside the middle sleeve 30, one side of the outer sleeve is pressed by the middle sleeve 30, and the other side of the outer sleeve is limited by the collar 60 on the chuck body 10.

The inner wall of the outer sleeve 40 comprises an expansion section 115, a contraction section 116 and a transition section 117, the inner diameter of the expansion section 115 is the expansion diameter, the diameter of the contraction section 116 is the contraction diameter, and the inner diameter of the transition section 117 is gradually increased from the contraction section 116 to the transition section 117. An inner boss 118 is arranged on the inner wall of the outer sleeve 40 close to the air outlet end 112, a limiting boss 119 is arranged on the inner boss 118 close to the air outlet end 112, a limiting member is arranged at the air outlet end 112 of the chuck body 10, and the limiting boss 119 is limited by the limiting member; the inner boss 118 has a sharp inner diameter on the side of the inlet end 111 to form the expanding section 115, and the expanding section 115 is a transition section 117 and a contracting section 116 in this order along the inlet end 111.

The process of inflating by adopting the inflation chuck of the embodiment is as follows:

1. inflating clamping head for inserting inflating valve

The outer sleeve 40 applies force to the air inlet end 111, the outer sleeve 40 presses against the middle sleeve 30, and moves together with the middle sleeve 30 to the air inlet end 111 after overcoming the elastic force of the elastic element 50, the clamping element 20 also moves obliquely to the air inlet end 111 under the action of the middle sleeve 30 and separates to two sides under the guidance of the guide groove 114 and the guide groove 31, meanwhile, the expansion section 115 of the outer sleeve 40 gives enough space to give way to the clamping element 20 moving outwards, and enough space is left at the air inflation channel 113 for the insertion of a valve nozzle by the two clamping elements 20.

2. The inflating clamping head clamps the inflating valve

The outer sleeve 40 is loosened, the middle sleeve 30 moves back towards the air outlet end 112 under the action of the elastic piece 50, the two clamping pieces 20 are close to the middle part under the action of the guide groove 114 and the guide groove 31 and clamp the valve, the outer sleeve 40 and the middle sleeve 30 move towards the air outlet end 112, the two ends of the clamping pieces 20 are clamped by the contraction section 116 of the outer sleeve 40, and at the moment, the clamping pieces 20 cannot move outwards, so that the valve can be clamped reliably.

3. Valve removal

Force is applied to the air inlet end 111 by the outer sleeve 40, the outer sleeve 40 presses against the middle sleeve 30 and moves towards the air inlet end 111 together with the middle sleeve 30, the clamping pieces 20 are separated towards two sides as described in the previous step 1, meanwhile, the expansion section 115 of the outer sleeve 40 gives up enough space to give way to the clamping pieces 20 moving outwards, and enough space is left at the inflation channel 113 for the air door mouth to come off by the two clamping pieces 20.

The inner diameter of the outer sleeve 40 of the inflation chuck of the embodiment adopts a reducing structure, the movement of the clamping piece 20 is controlled through the middle sleeve 30, when the clamping piece 20 is matched with the inner wall with the contracted diameter, the clamping piece 20 is closer to the axis of the chuck main body 10 to clamp the valve, because the clamping piece 20 is limited through the inner wall of the outer sleeve 40 at the moment, the clamping piece 20 clamps the valve very tightly, and the valve cannot be separated from the clamping piece 20 easily under the condition of external force, so that the reliability is improved remarkably.

The clamping surface 224 of the clamping piece 20 is provided with three clamping teeth 2241, when the two clamping pieces 20 are drawn close inwards, the three clamping pieces 20 are matched with three threads on the valve to clamp, the reliability of multi-tooth clamping is improved, slippage existing in single-tooth clamping is avoided, and the reliability is better; on the other hand, single-tooth clamping adopted by the existing structure is in single-point contact with the valve nozzle, multi-point contact is adopted when multi-tooth clamping is adopted, the valve nozzle is not prone to deviation in the valve clamping head, and meanwhile due to multi-point contact, the single clamping tooth 2241 is also small in stress, less in wear and not prone to thread slipping.

The above embodiments are intended to be illustrative, and should not be construed as limiting the scope of the invention, and the technical solutions, objects and effects of the present invention are described in full herein. Such as:

1. in this embodiment, the guiding grooves 114 are obliquely cut inwards along the outer wall of the chuck body 10 and face the direction of the air outlet end 112, and the guiding grooves 31 are all obliquely cut inwards along the outer wall of the middle sleeve 30 and face the direction of the air inlet end 111; based on the utility model discloses well guide way 114 carries out the purpose of guiding to holder 20 to and guide way 31 carries out the mobility control's purpose to holder 20, the shape of its guide way 114, guide way 31 is also not limited to the direction described in this embodiment, like: the direction of the elastic element 50 can be adjusted according to the arrangement position of the elastic element; the shape is not limited to a straight groove.

2. The clamping member 20 used in this embodiment is in the shape of a rod, and the shape of the clamping member 20 can be set according to the shape of the guide groove 114 or the guide groove 31.

3. In this embodiment, the number of the holding teeth 2241 on the holding member 20 may be 2, 3 or more, and the number of the teeth is not particularly critical.

4. The structure of the middle sleeve may not be limited to the structure described in the first embodiment of the present application, and as in the second embodiment, a middle sleeve structure of another structure may be adopted.

Example two

As shown in fig. 10, the present embodiment is different from the first embodiment in that: the middle sleeve 70 is not provided with a guide groove, so that the structure is simpler, the inflation chuck adopting the embodiment still has the technical effects emphasized by the application, and the principle and the advantages are not described in detail.

The above examples are not intended to be exhaustive list of the present invention, and there may be many other embodiments not listed. Any replacement and improvement made on the basis of not violating the conception of the utility model belong to the protection scope of the utility model.

Claims

1. An inflation clip, comprising: the outer sleeve is sleeved outside the chuck body and is axially and movably matched with the chuck body; the chuck main body is provided with an air inlet end and an air outlet end, and the middle part of the chuck main body is provided with an inflation channel which penetrates through the air inlet end and the air outlet end; the chuck body is provided with a guide groove, the clamping piece is arranged in the guide groove and can control the displacement of the clamping piece in the guide groove at least in the radial direction through the control piece; the inner wall of the outer sleeve is provided with a diameter-changing section at least in a partial area, the position of the diameter-changing section corresponds to that of the clamping piece, the inner wall of the outer sleeve is provided with a contraction diameter and an expansion diameter which are different in size, the clamping piece is in a first working position when matched with the inner wall of the contraction diameter, the clamping piece is in a second working position when matched with the inner wall of the expansion diameter, and the first working position is closer to the axis of the chuck main body relative to the second working position.

2. The inflation clip of claim 1, wherein the clip body includes an inner sleeve and an air inlet connector, the inner sleeve being axially opposed to and threadably connected to the air inlet connector, the guide slot being provided on the inner sleeve.

3. The inflation clip of claim 1, wherein the guide slots are both beveled inwardly along the outer wall of the clip body and directed toward the outlet end, the number of guide slots being two, and the two guide slots being disposed opposite each other on the clip body.

4. The inflation clip of claim 3 wherein the control member is a middle sleeve, and guide slots are provided in the middle sleeve, the guide slots each being chamfered inwardly along an outer wall of the middle sleeve and directed toward the inlet end; the clamping piece is matched with the guide groove and the guide groove at the same time.

5. The inflation clip of claim 4, further comprising an elastic member disposed between the inlet end of the clip body and the middle sleeve, wherein the outer sleeve is sleeved outside the middle sleeve, and one side of the outer sleeve is pressed by the middle sleeve while the other side of the outer sleeve is limited by the clip body.

6. The inflation clip of claim 5, wherein the inner wall of the outer sleeve comprises an expanded section, a contracted section and a transition section, wherein the inner diameter of the expanded section is the expanded diameter, the diameter of the contracted section is the contracted diameter, and the inner diameter of the transition section gradually increases from the contracted section to the transition section.

7. The inflation chuck according to claim 6, wherein the inner wall of the outer sleeve on the side close to the gas outlet end is provided with an inner boss, the inner boss on the side close to the gas outlet end is provided with a limiting boss, and the gas outlet end of the chuck body is provided with a limiting member, and the limiting boss is limited by the limiting member; the inner diameter of one side of the inner boss close to the air inlet end is sharply increased to form the expansion section, and the expansion section is a transition section and a contraction section in sequence along the direction of the air inlet end.

8. An inflation clip as claimed in any one of claims 1 to 7, wherein the clip is rod-shaped with leading ends at each end and a clip portion in the middle, the clip portion having at least two clip teeth formed on a side facing the inflation passage.

9. The inflation clip of claim 8, wherein the retaining member has a retaining surface, a first surface, a second surface and a third surface, the first surface and the third surface being located on opposite sides of the retaining member, the second surface and the retaining surface being located on opposite sides of the retaining member, and at least two retaining teeth being located on the retaining surface.

10. The gas filled gripping head according to claim 9 wherein the gripping teeth have a first flank and a second flank, the first flank being at an angle of 0 to 10 degrees to the first surface and the first flank being at an angle of 50 to 70 degrees to the second surface.