CN115541120A

CN115541120A - Pneumatic clamping device for tire valve of central tire inflation and deflation system

Info

Publication number: CN115541120A
Application number: CN202210913708.0A
Authority: CN
Inventors: 王新文
Original assignee: China North Vehicle Research Institute
Current assignee: China North Vehicle Research Institute
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-30

Abstract

The invention discloses a pneumatic clamping device for a tire valve of a central tire inflation and deflation system, which relates to the technical field of pneumatic transmission and control and comprises the following components: the pneumatic clamping device comprises a valve plate assembly and a pneumatic clamping assembly; the pneumatic clamping assemblies are connected in series into a whole through a connecting pipe, the pneumatic clamping assembly on one side is connected with the valve plate assembly through an air pipe, and the pneumatic clamping assembly on the other side is plugged through a plug; the pneumatic clamping assembly is used for pneumatically clamping a tire valve placed on the pneumatic clamping assembly through a miniature electromagnetic valve; the pneumatic device clamping device for the tire valve realizes the end face air passage sealing of the tire valve needing the end face air passage sealing through the pneumatic control of the miniature electromagnetic valve, thereby tightly connecting the tire valve with the pneumatic clamping assembly, communicating the air passage to be detected and debugged by the tire valve of the tire central inflation and deflation system, and meeting the requirement of batch tire valve detection and debugging.

Description

Pneumatic clamping device for tire valve of central tire inflation and deflation system

Technical Field

The invention relates to the technical field of pneumatic transmission and control, in particular to a pneumatic clamping device for a tire valve of a central tire inflation and deflation system.

Background

At present, a central inflation and deflation system product for vehicle tires is widely applied to various heavy military and civil vehicles, off-road vehicles, deserts, oil fields, railway construction and heavy engineering, is used for inflating, deflating and measuring the pressure of tires of wheel-type vehicles in running and forbidden states of the wheel-type vehicles, and meets the requirements of the wheel-type vehicles on the air pressure of the tires when the wheel-type vehicles pass through roads, muddy roads, ice and snow and the like. The production of the tire central inflation and deflation system product needs to be detected and debugged on a test bench, the inflation function, the deflation function and the pressure measurement function of the tire central inflation and deflation system product are tested, a tire valve is used as an execution element for realizing the inflation, deflation and pressure measurement functions of the tire central inflation and deflation system product and needs to be connected to the test bench through a pipeline to detect and debug the functions of the tire central inflation and deflation system product, the tire valve is sealed by an end surface air passage, when the batch tire central inflation and deflation system product is produced and debugged and tested, the end surface air passage of the tire valve needs to be sealed and tightly connected to connect the air passage of the tire central inflation and deflation system product debugging and testing, because each vehicle tire corresponds to one tire valve, the more the number of the types of the tire central inflation and deflation system product for debugging and testing is, and the more the dismounting workload of the tire valve during test and debugging is increased. Therefore, it is necessary to design a tire valve pneumatic clamping device for a central tire inflation and deflation system, so as to automatically complete the sealing and fastening connection of the air passage at the end surface of the tire valve when the central tire inflation and deflation product is tested, so as to complete the connection of the product debugging air passage of the central tire inflation and deflation system, reduce the working strength, improve the working efficiency, and meet the requirement of the batch tire central inflation and deflation system product debugging test.

Disclosure of Invention

In view of this, the present invention provides a tire valve pneumatic clamping device for a central tire inflation/deflation system, which performs end-face air passage sealing on a tire valve requiring end-face air passage sealing through pneumatic control of a micro electromagnetic valve, so as to connect the tire valve and a pneumatic clamping assembly tightly, so as to communicate with an air passage to be detected and debugged of the tire valve of the central tire inflation/deflation system, thereby meeting the requirement of batch tire valve detection and debugging.

The technical scheme of the invention is as follows: a tire valve pneumatic clamping device for a central tire inflation and deflation system, comprising: the pneumatic clamping device comprises a valve plate assembly and a pneumatic clamping assembly; more than two pneumatic clamping assemblies are connected in series into a whole through a connecting pipe, the pneumatic clamping assembly on one side is connected with the valve plate assembly through an air pipe, and the pneumatic clamping assembly on the other side is plugged through a plug; the valve plate assembly is used for providing an adjustable air source for the work of the pneumatic clamping assembly, and the pneumatic clamping assembly carries out pneumatic clamping on a tire valve placed on the pneumatic clamping assembly through the miniature electromagnetic valve.

Preferably, the valve plate assembly comprises: the quick connector comprises a quick connector I, a screw plug, a valve plate, a two-position three-way electromagnetic valve, a pressure reducing valve and a pipe connector I;

the two-position three-way electromagnetic valve and the pressure reducing valve are arranged on the upper surface of the valve plate, two air holes I are formed in the valve plate below the pressure reducing valve, one air hole I is communicated with an air inlet of the pressure reducing valve and is communicated with a threaded hole formed in the side surface of the valve plate through an air passage I formed in the valve plate, the threaded hole is used for installing a pipe joint I to be connected with a working air source, and the other air hole I is communicated with an air outlet of the pressure reducing valve and is communicated with one end of an air passage II formed in the valve plate and is used as an air pressure channel for outputting and setting of the pressure reducing valve; the other end of the air passage II is plugged by a screw plug;

the valve plate upper surface still is equipped with two holes, and a hole communicates with II intercommunications of air flue as two-position three way solenoid valve's normally closed port, and another hole is as two-position three way solenoid valve's normally open port, and communicates with the screw hole that the another side of valve plate set up, and this screw hole is used for connecting quick connector I, and quick connector I is used for passing through the trachea with the valve plate and links to each other with pneumatic clamping assembly.

Preferably, the pneumatic clamping assembly further comprises: the pipe joint II, the bottom plate, the upper cover, the quick connector II, the pillar, the pipe joint III, the fastening shaft, the diaphragm, the fixing ring, the pressing end and the spring;

the upper plate is supported on the bottom plate through four supporting columns, a pipe joint II and a pipe joint III are respectively arranged on two opposite sides of the bottom plate, the pipe joint II is communicated with an air inlet of the tire valve, and the pipe joint III is communicated with an air outlet of the tire valve; the upper cover is arranged on the upper plate, two pairs of sides of the upper cover are respectively provided with a quick-connection plug II, and the two quick-connection plugs II are communicated through an air passage V arranged in the upper cover; the miniature electromagnetic valve is arranged on the upper cover, and a normally closed port of the miniature electromagnetic valve is communicated with an air hole II on the upper surface of the upper cover; wherein, the air hole II is communicated with the air passage V at the same time;

the center of the upper plate is provided with a three-section step through hole I, the diaphragm is arranged at the large end of the step through hole I, and the small cylindrical section of the fastening shaft is coaxially sleeved with a spring and passes through the central through hole from one axial end of the diaphragm to be coaxially arranged in the step through hole I; the fastening shaft is of a stepped shaft-shaped structure I and is formed by compounding three sections of cylinders, the outer diameters of the fastening shaft are sequentially increased from one axial end to the other axial end, the middle cylindrical section is provided with external threads, and the small cylindrical section is provided with an internal thread hole;

the fixing ring is coaxially sleeved in the middle of the fastening shaft from the other end of the diaphragm and tightly presses the fixing ring through a fixing nut; the pressing end is in threaded connection with the small cylindrical section of the fastening shaft.

Preferably, the upper surface of the upper cover corresponding to the side surface of the air hole II on the upper cover is provided with an air hole III which is communicated with the large end of the step through hole II; when the micro electromagnetic valve is powered on, the air hole II is communicated with the air hole III, the strip-shaped groove is arranged between the two air holes and serves as an air outlet of the micro electromagnetic valve, and when the micro electromagnetic valve is powered off, the strip-shaped groove is communicated with the air hole III through the micro electromagnetic valve.

Preferably, an annular groove is formed in the end face of one end, connected with the small cylindrical section, of the middle cylindrical section of the fastening shaft, one end of the spring abuts against the inner bottom face of the annular groove, and the other end of the spring abuts against a step between the middle cylindrical section and the small cylindrical section of the step through hole I.

Preferably, the bottom plate is of a cuboid structure, and a rectangular groove is formed in the upper surface of the bottom plate and used for mounting the tire valve; a step hole is formed in the left side of the upper surface of the rectangular groove and used as an air inlet of a tire valve, and the step hole is communicated with a threaded hole formed in the left side surface of the bottom plate through an air passage III formed in the bottom plate; a hole is formed in the right side of the upper surface of the rectangular groove and used as an air outlet of the tire valve, and the hole is communicated with a threaded hole formed in the right side surface of the bottom plate through an air passage IV formed in the bottom plate; the pipe joint II is arranged in a threaded hole in the left side face of the bottom plate; and the pipe joint III is arranged in the threaded hole on the right side surface of the bottom plate.

Preferably, the press-fixing end head is formed by coaxially compounding a cylinder and a circular truncated cone, the cylinder is positioned at the small end of the circular truncated cone, and the cylinder is provided with external threads; more than two U-shaped grooves are uniformly arranged on the outer circumferential surface of the large end of the circular truncated cone, and the large end of the circular truncated cone is divided into more than two sawtooth structures by the more than two U-shaped grooves; and the cylinder of the pressing and fixing end is butted with the internal thread hole at the small end of the fastening shaft.

Preferably, the pneumatic clamping assembly further comprises: locking screws and pressing shafts; the center of the upper cover is provided with a three-section step through hole II, the small end of the step through hole II is provided with internal threads, the step through hole I and the step through hole II are coaxially arranged, and the large ends of the step through hole I and the step through hole II are opposite; the locking screw is coaxially arranged in the step through hole II, and a pressing shaft is arranged between the locking screw and the fastening shaft;

the end face of the large cylindrical section of the fastening shaft is provided with a central blind hole for placing one end of the pressing shaft, the locking screw is of a stepped shaft-shaped structure III and is formed by compounding two sections of cylinders, the end face of the large cylindrical section is provided with a central counter bore for placing the other end of the pressing shaft, the outer circumferential surface of the small cylinder in butt joint with the large cylindrical section is provided with an annular groove, an O-shaped ring is placed in the annular groove, the small cylinder is provided with an external thread, and the end face of the small cylinder is provided with a strip-shaped groove; the pressing shaft is a cylinder with two axial ends coaxially provided with conical structures.

Has the advantages that:

1. the pneumatic clamping device for the tire valve, disclosed by the invention, has the characteristics of simple structure and convenience in use, and can meet the installation requirements of the tire valve during the product detection and debugging of a central tire inflation and deflation system of four or more tires.

2. The invention uses the valve plate assembly composed of the two-position three-way electromagnetic valve, the pressure reducing valve and the like to provide an adjustable air source for the pneumatic clamping assembly to work, and can control the clamping force of the pneumatic clamping assembly during the detection and debugging of the tire valve by adjusting the output pressure of the pressure reducing valve, thereby ensuring the sealing pressure of the end face air passage of the tire valve and avoiding the tire valve from bearing excessive pressure.

3. The pneumatic clamping assembly designed in the invention is beneficial to clamping the tested tire valve, and can realize accurate end face air passage sealing of the tire valve in the product detection and debugging work of the central tire inflation and deflation system by utilizing the pneumatic control of the miniature electromagnetic valve.

4. The annular groove is formed in the end face of one end, connected with the small cylindrical section, of the middle cylindrical section of the fastening shaft, so that the spring can be installed conveniently, and meanwhile, the spring can be guided for compression and rebound.

5. The structural design of the pressing and fixing end socket is convenient for quick installation with the fastening shaft, so that the end socket can be conveniently sealed by pressing the tested tire valve after the micro electromagnetic valve is electrified; meanwhile, the sawtooth structure of the large end of the press-fixing end can effectively ensure that the stress of the tire valve to be tested is uniform.

6. The design of the locking screw and the pressing shaft provides a manual function for the device, and the locking screw is used for controlling the fastening shaft to move up and down under the condition of failure of pneumatic control, so that the manual clamping (including clamping and releasing) of the tested tire valve can be realized, the sealing connection of the end face air passage of the tested tire valve is completed, and the sustainable detection and debugging of a central inflation and deflation system product of the tire can be ensured.

Drawings

Fig. 1 is a schematic view of a tire valve pneumatic clamping device of the present invention.

FIG. 2 is a schematic view of the valve plate assembly of the present invention.

FIG. 3 is a schematic diagram of the pneumatic clamping assembly of the present invention.

FIG. 4 is a cross-sectional view of the pneumatic clamping assembly of the present invention.

FIG. 5a is a top view of a valve plate according to the present invention.

FIG. 5b isbase:Sub>A cross-sectional view taken along line A-A of the valve plate of the present invention.

Fig. 6a is a three-dimensional view of a base plate according to the present invention.

Figure 6b is a cross-sectional view of the base plate of the present invention.

Fig. 6c is a top view of the base plate of the present invention.

Fig. 7a is a three-dimensional view of an upper plate in the present invention.

Fig. 7b is a top view of the upper plate of the present invention.

Fig. 7c is a cross-sectional view of the upper plate of the present invention.

Fig. 8a is a front view of a strut according to the present invention.

FIG. 8b isbase:Sub>A cross-sectional view taken along line A-A of the strut of the present invention.

FIG. 9a is a top view of the upper cover of the present invention.

FIG. 9B is a sectional view taken along line B-B of the upper lid of the present invention.

Fig. 9c is a cross-sectional view of the upper cover of the present invention.

Fig. 10a is a cross-sectional view of the locking screw of the present invention.

Fig. 10b is a three-dimensional view of the locking screw of the present invention.

Fig. 11 is a three-dimensional view of the pressing shaft of the present invention.

Fig. 12a is a cross-sectional view of a fastening shaft in the present invention.

Fig. 12b is a three-dimensional view of a fastening shaft of the present invention.

Fig. 13a is a cross-sectional view of a membrane of the present invention.

Fig. 13b is a three-dimensional view of a membrane of the present invention.

FIG. 14a is a cross-sectional view of a retaining ring of the present invention.

Fig. 14b is a three-dimensional view of a retaining ring of the present invention.

Fig. 15 is a three-dimensional view of a fastening nut of the present invention.

Fig. 16a is a three-dimensional view of a tamping tip of the present invention.

Figure 16b is a cross-sectional view of a tamping tip of the present invention.

Fig. 16c is a front view of a tamping tip of the present invention.

FIG. 17 is a pneumatic clamping assembly of the present invention incorporated into a tire valve.

Fig. 18 is a schematic view of the pneumatic tire valve clamping device of the present invention installed in a tire valve.

Wherein, 1-valve plate assembly; 2-a pneumatic clamping assembly; 3-the trachea; 4-connecting pipe; 5-quick plug connector I; 6-plug screw; 7-a valve plate; 8-two-position three-way electromagnetic valve; 9-a pressure reducing valve; 10-pipe joint I; 11-pipe joint II; 12-a base plate; 13-upper plate; 14-a miniature electromagnetic valve; 15-upper cover; 16-a quick connector II; 17-a bolt; 18-a pillar; 19-coupling III; 20-locking screws; 21-O-ring; 22-a fastening shaft; 23-a membrane; 24-a fixed ring; 25-a fixing nut; 26-pressing and fixing the end; 27-a spring; 28-pressing the shaft; 29-attachment screw.

Detailed Description

The invention is described in detail below by way of example with reference to the accompanying drawings.

Example 1:

the embodiment provides a tire valve pneumatic device clamping device of central tire inflation and deflation system, and pneumatic control through a miniature electromagnetic valve realizes the end surface air passage sealing of a tire valve needing end surface air passage sealing, so that the tire valve is tightly connected with a pneumatic clamping assembly to communicate the air passage to be detected and debugged by the tire valve of the central tire inflation and deflation system, and the requirement of batch tire valve detection and debugging is met.

As shown in fig. 1, the pneumatic clamping device for a tire valve comprises: the pneumatic clamping device comprises a valve plate assembly 1, a pneumatic clamping assembly 2, an air pipe 3 and a connecting pipe 4; the pneumatic clamping assemblies 2 are connected in series into a whole through connecting pipes 4, the quick plug connector II 16 on one side of the pneumatic clamping assembly 2 on the leftmost side is connected with the quick plug connector I5 of the valve plate assembly 1 through an air pipe 3, and the quick plug connector II 16 on one side of the pneumatic clamping assembly 2 on the rightmost side is plugged through a plug; wherein, the connecting pipe 4 is arranged on the quick-connection-peg II 16 at the other side of the adjacent pneumatic clamping assembly 2.

In this embodiment, the valve plate assembly 1 is used to provide an adjustable air source for the operation of the pneumatic clamping assembly 2, as shown in fig. 2, the valve plate assembly 1 includes: the quick connector comprises a quick plug I5, a screw plug 6, a valve plate 7, a two-position three-way electromagnetic valve 8, a pressure reducing valve 9 and a pipe joint I10; as shown in fig. 5a and 5b, the upper surface of the valve plate 7 is provided with a blind hole and four threaded holes arranged in a square shape, and the four threaded holes are used for installing a two-position three-way solenoid valve 8; four threaded holes which are arranged in a rectangular shape are formed in the periphery of the blind hole and are used for coaxially mounting the pressure reducing valve 9 on the blind hole; the two radial opposite sides of the blind hole are respectively provided with an air hole I (the connecting line of the two air holes I is parallel to the long edges of the four threaded holes which are arranged in a rectangular shape), the air hole I on one side of the blind hole (communicated with an air inlet of a pressure reducing valve 9) is communicated with a threaded hole formed in the side surface of the valve plate 7 through an air passage I formed in the valve plate 7, the threaded hole in the side surface of the valve plate 7 is used for installing a pipe joint I10 so as to be connected with a working air source, and the air hole I on the other side of the blind hole (communicated with an air outlet of the pressure reducing valve 9) is communicated through one end of an air passage II in the valve plate 7 and is jointly used as an air pressure channel for outputting and setting of the pressure reducing valve 9; the other end of the air passage II is connected with a screw plug 6 for plugging the air passage; meanwhile, the upper surface of the valve plate 7 is also provided with two holes, one hole is communicated with the air passage II and is used as a normally closed port of the two-position three-way electromagnetic valve 8, the other hole is used as a normally open port of the two-position three-way electromagnetic valve 8 and is communicated with a threaded hole arranged on the other side surface of the valve plate 7, and the threaded hole on the side surface is used for connecting a quick connector I5; after the two-position three-way electromagnetic valve 8 is electrified, the normally closed port of the two-position three-way electromagnetic valve is opened, and the gas with the pressure adjusted by the pressure reducing valve 9 flows out of the air passage II in the valve plate 7 sequentially through the normally closed port of the two-position three-way electromagnetic valve 8, the normally open port of the two-position three-way electromagnetic valve 8 and the quick connector I5.

In the present embodiment, as shown in fig. 3 and 4, the pneumatic clamping assembly 2 includes: the device comprises a pipe joint II 11, a bottom plate 12, an upper plate 13, a miniature electromagnetic valve 14, an upper cover 15, a quick-plug joint II 16, a bolt 17, a support column 18, a pipe joint III 19, a locking screw 20, an O-shaped ring 21, a fastening shaft 22, a diaphragm 23, a fixing ring 24, a fixing nut 25, a pressing end 26, a spring 27, a pressing shaft 28 and a connecting screw 29;

as shown in fig. 6a, 6b and 6c, the bottom plate 12 is a rectangular parallelepiped structure, and the upper surface of the bottom plate 12 is provided with a rectangular groove, one longitudinal side of the rectangular groove (which is the right side of the rectangular groove) is communicated with the end surface of the bottom plate 12, and the left side of the upper surface of the rectangular groove is provided with a step hole (as an air inlet of a tire valve), and the step hole is communicated with a threaded hole arranged on the left side of the bottom plate 12 through an air channel iii arranged inside the bottom plate 12; a hole (as an air outlet of a tire valve) is formed in the right side of the upper surface of the rectangular groove and is communicated with a threaded hole formed in the right side of the bottom plate 12 through an air passage IV formed in the bottom plate 12; the pipe joint II 11 is arranged in a threaded hole in the left side face of the bottom plate 12, meanwhile, the pipe joint II 11 is communicated with an air inlet of a tire valve, the tire valve is connected with a box body of a tire central inflation and deflation system product, and the box body provides a working air source for the tire valve; the pipe joint III 19 is arranged in a threaded hole in the right side surface of the base plate 12, and meanwhile, the pipe joint III 19 is communicated with an air outlet of a tire valve and used for connecting a tire; the bottom surface in the rectangular groove is additionally provided with three threaded holes which are used as spare threaded holes for pressing and fixing the tire valve by using screws;

four corners of the upper surface of the bottom plate 12 are respectively provided with a threaded hole (the four threaded holes are arranged in a rectangular shape) for mounting the support column 18; as shown in fig. 8a and 8b, the pillar 8 is a stepped shaft formed by combining two sections of cylinders with different outer diameters, the small cylinder section of the stepped shaft is provided with an external thread, the end part of the large cylinder section is provided with a threaded blind hole, and two opposite sides of the outer circumference of the large cylinder section, which is close to the small cylinder section, are respectively cut with a plane, so that the pillar 18 can be conveniently screwed into threaded holes at four corners of the upper surface of the base plate 12 by using a tool such as a wrench;

as shown in fig. 7a, 7b and 7c, the upper plate 13 is a cuboid structure, and a cuboid notch is formed in one side surface of the upper plate in the length direction, so that the tire valve to be tested can be observed conveniently; the center of the bottom of the upper plate 13 is provided with a cylindrical boss, so that the measured tire valve can be observed conveniently; the center of the upper plate 13 is provided with a three-section step through hole I, and the corresponding hole diameters of the step through hole I from the top to the bottom are sequentially reduced; two threaded holes (used for installing connecting screws 29 so as to fix the upper cover 15 on the upper plate 13) are formed in the middle of the upper surface of the upper plate 13, the two threaded holes are located on two radial opposite sides of the step through hole I, and the central connecting line of the two threaded holes is parallel to the length direction of the upper plate 13; four corners of the upper plate 13 are respectively provided with a through hole, and four bolts 17 respectively penetrate through the through holes at the four corners of the upper plate 13 to fixedly connect the upper plate 13 with four pillars 18;

as shown in fig. 12a and 12b, the fastening shaft 22 is a stepped shaft-shaped structure i, which is formed by combining three sections of cylinders, and the outer diameters of the fastening shaft 22 are sequentially increased from one axial end to the other axial end, the end surface of a large cylinder section of the fastening shaft is provided with an arc-shaped groove and a central blind hole (the arc-shaped groove and the central blind hole are coaxial), the middle cylinder section is provided with an external thread, the end surface of one end of the middle cylinder section, which is connected with a small cylinder section, is provided with an annular groove, and the small cylinder section is provided with an internal thread hole;

as shown in fig. 13a and 13b, the diaphragm 23 is a circular sleeve-shaped structure with a through hole at the center, and two ends of the diaphragm in the axial direction are provided with annular bosses, and an annular groove is arranged on the annular boss at one end, so that the cross section of the whole diaphragm 23 along the axial direction is S-shaped;

as shown in fig. 14a and 14b, the fixing ring 24 is a stepped shaft-shaped structure ii, which is formed by compounding two sections of cylinders with different outer diameters; a step hole is formed in the center of the fixing ring 24, and the large end and the small end of the step hole correspond to the large end and the small end of the fixing ring 24;

as shown in fig. 15, the fixing nut 25 is a circular structure with an internal thread through hole, and four symmetrical platforms are arranged on the outer circumferential surface of the fixing nut, so that the fixing nut is convenient for a wrench to use when being screwed down;

as shown in fig. 16a, 16b and 16c, the fastening end 26 (made of teflon to avoid scratching the surface of the tire valve) is formed by coaxially combining a cylinder and a truncated cone, the cylinder is located at the small end of the truncated cone, and the cylinder is provided with external threads to facilitate the butt joint of the fastening end 26 and the internal threaded hole at the small end of the fastening shaft 22; the end face of the large end of the circular truncated cone is provided with a conical groove coaxial with the large end, six U-shaped grooves are uniformly formed in the outer circumferential surface of the large end of the circular truncated cone, and the six U-shaped grooves divide the large end of the circular truncated cone into six sections of sawtooth structures;

as shown in fig. 9a, 9b and 9c, the upper cover 15 is a short cylinder structure, and two platforms are respectively arranged on two opposite sides of the cylinder in the radial direction (the two platforms are parallel to each other), the side where the two platforms are located is respectively provided with a threaded hole (for installing a quick connector ii 16), the two threaded holes are communicated through an air passage v arranged inside the upper cover 15, the air passage is simultaneously communicated with an air hole ii arranged on the upper surface of the upper cover 15, and the air hole ii is connected with a normally closed port of the micro electromagnetic valve 14; the center of the upper cover 15 is provided with a three-section step through hole II (the hole diameter is sequentially increased along the direction from the upper surface to the lower surface of the upper cover 15), and the small end of the step through hole II is provided with an internal thread; the upper surface of the upper cover 15 corresponding to the side surface of the air hole II is provided with an air hole III which is communicated with the big end of the step through hole II, when the micro electromagnetic valve 14 is electrified, the air hole II is communicated with the air hole III, a strip-shaped groove is arranged between the two air holes (the length direction of the strip-shaped groove is vertical to the connecting line of the two air holes, the strip-shaped groove is used as an air outlet of the micro electromagnetic valve 14, and when the micro electromagnetic valve 14 is powered off, the strip-shaped groove is communicated with the air hole III through the micro electromagnetic valve 14); mounting threaded holes of the two miniature electromagnetic valves 14 are formed in the strip-shaped groove, so that the miniature electromagnetic valves 14 can be fixed on the upper surface of the upper cover 15 through screws;

as shown in fig. 10a and 10b, the locking screw 20 is a stepped shaft-shaped structure iii, which is formed by combining two cylinders, wherein the end surface of the large cylinder is provided with a central counter bore, the outer circumferential surface of the small cylinder, which is butted with the large cylinder, is provided with an annular groove, the small cylinder is provided with an external thread, and the end surface of the small cylinder is provided with a strip-shaped groove; an O-shaped ring 21 is placed in an annular groove on the outer circumferential surface of the locking screw 20, the small cylindrical end of the locking screw 20 is screwed into the small end of the step through hole II in the center of the upper cover 15 from the lower surface of the upper cover 15, and the O-shaped ring 21 in the annular groove on the outer circumferential surface of the locking screw 20 and the inner surface of the step through hole II in the center of the upper cover 15 are tightly sealed and fastened by using a screwdriver;

as shown in fig. 11, the pressing shaft 28 is a cylinder with two axial ends coaxially provided with conical structures, one end of the pressing shaft 28 is placed in the central blind hole of the large cylinder section of the fastening shaft 22, the other end is located in the central counter bore of the large cylinder of the locking screw 20, the lower end face of the upper cover 15 presses the outer edge of the diaphragm 23, and the upper cover 15 is fixed on the upper plate 13 through the connecting screw 29;

as shown in fig. 4, the small cylindrical section of the fastening shaft 22 passes through the central through hole thereof from one axial end of the diaphragm 23, the small end of the fixing ring 24 is coaxially sleeved in the middle of the fastening shaft 22 from the other end of the diaphragm 23 and presses the diaphragm 23, and at the same time, the inner bottom surface of the large end of the fixing ring 24 is pressed by the fixing nut 25, thereby further pressing the diaphragm 23; the diaphragm 23 is arranged at the large end of the step through hole I in the center of the upper plate 13, the small cylindrical section of the fastening shaft 22 is coaxially sleeved with the spring 27 and inserted into the small end of the step through hole I in the center of the upper plate 13, so that one end of the spring 27 abuts against the inner bottom surface of the annular groove of the fastening shaft 22, and the other end of the spring 27 abuts against a step between the middle cylindrical section and the small cylindrical section of the step through hole I in the upper plate 13; the press-fixing end 26 is fixed with the fastening shaft 22 from the bottom of the upper plate 13 through threaded connection; when the manual work is carried out: the locking screw 20 is pressed downwards, when the fastening shaft 22 is pressed downwards through the pressing shaft 28, the fastening shaft 22 drives the pressing and fixing end head 26 arranged on the fastening shaft to press the surface of the tire valve downwards to fasten the tire valve, the sawtooth structure of the large end of the circular table section of the pressing and fixing end head 26 deforms, so that the large end of the circular table section of the pressing and fixing end head 26 is tightly combined with the surface of the tire valve, and the uniform stress is ensured when the tire valve is clamped; when the pneumatic work is carried out: the miniature electromagnetic valve 14 is powered on, air flows into a cavity formed by the diaphragm 23, the fastening shaft 22 and the upper cover 15, the fastening shaft 22 compresses the spring 27 to move downwards under the action of air pressure, and when the fastening shaft 22 drives the pressing and fixing end head 26 mounted on the fastening shaft to press the surface of the tire valve downwards to fasten the tire valve, the sawtooth structure at the large end of the circular truncated cone section of the pressing and fixing end head 26 deforms, so that the large end of the circular truncated cone section of the pressing and fixing end head 26 is tightly combined with the surface of the tire valve, and the uniform stress is ensured when the tire valve is clamped.

The working principle of the tire valve pneumatic device clamping device is as follows:

the output pressure of a pressure reducing valve 9 in the valve plate assembly 1 is adjusted so as to control the clamping force of the pneumatic clamping assembly 2 on the tire valve to be tested; an O-shaped sealing ring (the hole of the tire valve air outlet is sealed by the O-shaped sealing ring carried by the tire valve) is arranged in a step hole (the tire valve air inlet) on the upper surface of the bottom plate 12 of the pneumatic clamping assembly 2;

as shown in fig. 17 and 18, a tire valve requiring end face sealing is installed on the pneumatic clamping assembly 2, the two-position three-way solenoid valve 8 of the valve plate assembly 1 is energized, and the gas with pressure adjusted by the pressure reducing valve 9 enters the gas path of the pneumatic clamping assembly 2 connected in series by the connecting pipe 4 through the gas pipe 3; after the micro electromagnetic valve 14 is electrified, gas in the gas path enters a cavity between the diaphragm 23, the fastening shaft 22 and the upper cover 15, the diaphragm 23 is pushed to drive the fastening shaft 22 to compress the spring 17, so that a pressing end 26 arranged on the fastening shaft 22 is driven to move downwards to press the tire valve placed on the bottom plate 12, and a gas path hole on the lower end face of the tested tire valve is sealed; because the press-fixing end head 26 is made of polytetrafluoroethylene materials, the surface of the tire valve can be effectively prevented from being scratched, and the even stress of the tested tire valve can be effectively ensured due to the saw-tooth structure of the press-fixing end head 26; when the micro electromagnetic valve 14 is powered off, high-pressure gas in the cavity between the diaphragm 23 and the upper cover 15 is exhausted from the micro electromagnetic valve 14, the fastening shaft 22 drives the diaphragm 23 to move upwards under the action of the spring 27, and the pressing and fixing end 26 arranged on the fastening shaft 22 loosens the tested and debugged tire valve;

when the micro electromagnetic valves 14 on a plurality of (preferably eight in this embodiment) pneumatic clamping assemblies 2 are simultaneously powered on, clamping of a plurality of tested tire valves can be simultaneously performed, so that end face air passage sealing of the plurality of tested tire valves is realized; any one miniature electromagnetic valve 14 can be electrified to clamp a tested tire valve;

under the condition that the pneumatic control fails, a screwdriver is used for rotating the strip-shaped groove on the end face of the locking screw 20, so that the locking screw 20 moves downwards in the upper cover 15 and pushes the pressing shaft 28, further the fastening shaft 22 is pushed to move downwards, the pressing end head 26 arranged on the fastening shaft 22 is driven to move downwards, the tire valve to be tested is pressed, the air passage on the end face of the tire valve to be tested is sealed, the screwdriver is used for reversely rotating the strip-shaped groove on the end face of the locking screw 20, so that the locking screw 20 moves upwards in the upper cover 15, the fastening shaft 22 is pushed to drive the pressing end head 26 to move upwards under the action of the spring 27, and the tire valve to be tested is loosened.

Example 2:

on the basis of the embodiment 1, the end face size of the tire valve placed on the bottom plate 12, the positions of the air holes II and Kong in the upper cover 15 and the distance between the air holes II and Kong are changed, so that the clamping device can be used for clamping the tire valves with end faces sealed in other sizes.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tire valve pneumatic clamping device for a central tire inflation and deflation system, comprising: the valve plate assembly (1) and the pneumatic clamping assembly (2); more than two pneumatic clamping assemblies (2) are connected in series into a whole through a connecting pipe (4), the pneumatic clamping assembly (2) on one side is connected with the valve plate assembly (1) through an air pipe (3), and the pneumatic clamping assembly (2) on the other side is plugged through a plug; the valve plate assembly (1) is used for providing an adjustable air source for the work of the pneumatic clamping assembly (2), and the pneumatic clamping assembly (2) is used for pneumatically clamping a tire valve placed on the pneumatic clamping assembly through the miniature electromagnetic valve (14).

2. The tire valve pneumatic apparatus of central tire inflation and deflation system according to claim 1, wherein the valve plate assembly (1) comprises: the quick connector comprises a quick connector I (5), a screw plug (6), a valve plate (7), a two-position three-way electromagnetic valve (8), a pressure reducing valve (9) and a pipe connector I (10);

the two-position three-way electromagnetic valve (8) and the pressure reducing valve (9) are arranged on the upper surface of the valve plate (7), two air holes I are formed in the valve plate (7) below the pressure reducing valve (9), one air hole I is communicated with an air inlet of the pressure reducing valve (9) and is communicated with a threaded hole formed in the side surface of the valve plate (7) through an air passage I formed in the valve plate (7), the threaded hole is used for installing a pipe joint I (10) to be connected with a working air source, and the other air hole I is communicated with an air outlet of the pressure reducing valve (9) and is communicated with one end of an air passage II formed in the valve plate (7) and is used as an air pressure channel for outputting and setting of the pressure reducing valve (9); the other end of the air passage II is plugged by a screw plug (6);

valve plate (7) upper surface still is equipped with two holes, and a hole communicates with II intercommunications of air flue as the normally closed port of two-position three way solenoid valve (8), and another hole is as the normally open port of two-position three way solenoid valve (8), and communicates with the screw hole that valve plate (7) another side set up, and this screw hole is used for connecting quick-witted plug I (5), and quick-connect plug I (5) are used for linking to each other valve plate (7) with pneumatic clamping assembly (2) through trachea (3).

3. The pneumatic clamping device for a tire valve of a central tire inflation and deflation system according to claim 1 or 2, wherein the pneumatic clamping assembly (2) further comprises: the pipe joint II (11), the bottom plate (12), the upper plate (13), the upper cover (15), the quick-plugging joint II (16), the support column (18), the pipe joint III (19), the fastening shaft (22), the diaphragm (23), the fixing ring (24), the pressing end (26) and the spring (27);

the upper plate (13) is supported on the bottom plate (12) through four support columns (18), a pipe joint II (11) and a pipe joint III (19) are respectively installed on two opposite sides of the bottom plate (12), the pipe joint II (11) is communicated with an air inlet of the tire valve, and the pipe joint III (19) is communicated with an air outlet of the tire valve; the upper cover (15) is arranged on the upper plate (13), two pairs of sides of the upper cover (15) are respectively provided with a quick connector II (16), and the two quick connectors II (16) are communicated through an air channel V arranged in the upper cover (15); the miniature electromagnetic valve (14) is arranged on the upper cover (15), and a normally closed port of the miniature electromagnetic valve is communicated with an air hole II on the upper surface of the upper cover (15); wherein, the air hole II is communicated with the air passage V at the same time;

the center of the upper plate (13) is provided with a three-section step through hole I, the diaphragm (23) is arranged at the large end of the step through hole I, the small cylindrical section of the fastening shaft (22) is coaxially sleeved with a spring (27), and the spring penetrates through the center through hole from one axial end of the diaphragm (23) and is coaxially arranged in the step through hole I; the fastening shaft (22) is of a stepped shaft-shaped structure I and is formed by compounding three sections of cylinders, the outer diameters of the fastening shaft (22) are sequentially increased from one axial end to the other axial end, the middle cylindrical section is provided with external threads, and the small cylindrical section is provided with an internal thread hole;

the fixing ring (24) is coaxially sleeved in the middle of the fastening shaft (22) from the other end of the diaphragm (23), and the fixing ring (24) is pressed tightly through a fixing nut (25); the pressing end (26) is in threaded connection with the small cylindrical section of the fastening shaft (22).

4. The pneumatic clamping device for the tire valve of the central inflation and deflation system of the tire as claimed in claim 3, wherein the upper surface of the upper cover (15) corresponding to the side of the air hole II on the upper cover (15) is provided with an air hole III which is communicated with the big end of the step through hole II; when the micro electromagnetic valve (14) is powered on, the air hole II is communicated with the air hole III, a strip-shaped groove is arranged between the two air holes and is used as an air outlet of the micro electromagnetic valve (14), and when the micro electromagnetic valve (14) is powered off, the strip-shaped groove is communicated with the air hole III through the micro electromagnetic valve (14).

5. The pneumatic clamping device for a tire valve of a central inflation/deflation system for a tire as claimed in claim 3, wherein the fastening shaft (22) has an annular groove on the end surface of the end where the middle cylindrical section meets the small cylindrical section, and the spring (27) has one end abutting against the inner bottom surface of the annular groove and the other end abutting against the step between the middle cylindrical section and the small cylindrical section of the stepped through-hole I.

6. The tire valve pneumatic clamping device of the central tire inflation/deflation system of claim 3, wherein the base plate (12) has a rectangular parallelepiped structure with a rectangular groove on the upper surface for mounting the tire valve; a step hole is formed in the left side of the upper surface of the rectangular groove and used as an air inlet of a tire valve, and the step hole is communicated with a threaded hole formed in the left side surface of the bottom plate (12) through an air passage III formed in the bottom plate (12); a hole is formed in the right side of the upper surface of the rectangular groove and used as an air outlet of the tire valve, and the hole is communicated with a threaded hole formed in the right side surface of the bottom plate (12) through an air passage IV formed in the bottom plate (12); the pipe joint II (11) is arranged in a threaded hole in the left side face of the bottom plate (12); the pipe joint III (19) is arranged in a threaded hole on the right side surface of the bottom plate (12).

7. The tire valve pneumatic device of central inflation/deflation system for tire according to claim 3, wherein the fixing end (26) is formed by coaxially combining a cylinder and a truncated cone, the cylinder is located at the small end of the truncated cone, the cylinder is provided with external threads; more than two U-shaped grooves are uniformly arranged on the outer circumferential surface of the large end of the circular truncated cone, and the large end of the circular truncated cone is divided into more than two sawtooth structures by the more than two U-shaped grooves; the cylinder of the pressing and fixing end head (26) is butted with the internal thread hole at the small end of the fastening shaft (22).

8. A tyre valve pneumatic clamping device of a central tyre inflation/deflation system according to claim 3, wherein the pneumatic clamping assembly (2) further comprises: a locking screw (20) and a pressing shaft (28); the center of the upper cover (15) is provided with a three-section step through hole II, the small end of the step through hole II is provided with internal threads, and the step through hole I and the step through hole II are coaxially arranged and the large ends of the step through hole I and the step through hole II are opposite; the locking screw (20) is coaxially arranged in the step through hole II, and a pressing shaft (28) is arranged between the locking screw (20) and the fastening shaft (22);

the end face of the large cylindrical section of the fastening shaft (22) is provided with a central blind hole for placing one end of the pressing shaft (28), the locking screw (20) is of a stepped shaft-shaped structure III and is formed by compounding two sections of cylinders, the end face of the large cylindrical body is provided with a central counter bore for placing the other end of the pressing shaft (28), the outer circumferential surface of the small cylindrical body, which is in butt joint with the large cylindrical body, is provided with an annular groove, an O-shaped ring (21) is placed in the annular groove, the small cylindrical body is provided with external threads, and the end face of the small cylindrical body is provided with a strip-shaped groove; the pressing shaft (28) is a cylinder with two axial ends coaxially provided with conical structures.