CN217421672U

CN217421672U - Ejection device

Info

Publication number: CN217421672U
Application number: CN202221529475.6U
Authority: CN
Inventors: 黎鹏; 谌发坤; 许伟; 罗擎柱; 彭锟
Original assignee: Chongqing Kairui Testing Equipment Co ltd; China Automotive Engineering Research Institute Co Ltd
Current assignee: Chongqing Kairui Testing Equipment Co ltd; China Automotive Engineering Research Institute Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-09-13
Anticipated expiration: 2032-06-17

Abstract

The utility model relates to an impact ejection type test equipment field specifically discloses an ejection device. The ejection device comprises an ejection cylinder, a gas storage tank and a gas supply piece, wherein the gas supply piece is communicated with the gas storage tank, an ejection cavity is arranged in the ejection cylinder, a piston is arranged in the ejection cavity in a sliding sealing mode, a piston rod is fixed on the piston, a gas inlet cavity is also arranged in the ejection cylinder, the gas inlet cavity is communicated with the gas storage tank, and a communication port for communicating the ejection cavity with the gas inlet cavity is arranged in the ejection cylinder; an opening valve core is arranged in the air inlet cavity, the opening valve core is opposite to the communicating port and used for sealing the communicating port, and the opening valve core is connected with a pushing piece used for pushing the opening valve core to slide. The utility model provides a launch device can provide bigger ejection speed under the condition that need not use the valve to extension launch device's life.

Description

Ejection device

Technical Field

The utility model relates to an impact ejection type test equipment field, concretely relates to ejection device.

Background

When the ejection device is used, air supply equipment such as an air compressor and the like is connected with the air cylinder, and the air supply equipment drives the piston of the air cylinder to slide, so that the piston rod is driven to extend out to eject the object. However, when the compressed air supplied to the cylinder per unit time by the air supply device or other device is limited, the extending speed of the piston rod of the cylinder is limited, and it is difficult to satisfy the requirement of a large ejection speed.

Then, an ejection device with an air storage tank is provided, the air storage tank is communicated with the air cylinder and the air supply equipment at the same time, a valve is arranged between the air storage tank and the air cylinder, and before a test, compressed air is conveyed into the air storage tank through the air supply equipment, so that the pressure intensity in the air storage tank is increased; during testing, the valve is opened, compressed air in the air storage tank quickly enters the air cylinder, and a piston rod of the air cylinder slides out quickly.

Although the ejection device can provide a larger ejection speed, the pressure in the air storage tank is larger because more compressed air needs to be introduced into the air storage tank, and the valve is easy to damage under the action of the pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a catapulting device under the condition that need not use the valve, provides bigger ejection speed to extension catapulting device's life.

In order to achieve the above purpose, the utility model adopts the following technical scheme: an ejection device comprises an ejection cylinder, a gas storage tank and a gas supply piece, wherein the gas supply piece is communicated with the gas storage tank, an ejection cavity is arranged in the ejection cylinder, a piston is slidably sealed in the ejection cavity, a piston rod is fixed on the piston, a gas inlet cavity is also arranged in the ejection cylinder and is communicated with the gas storage tank, and a communication port for communicating the ejection cavity with the gas inlet cavity is arranged in the ejection cylinder; an opening valve core is arranged in the air inlet cavity, the opening valve core is opposite to the communicating port and used for sealing the communicating port, and the opening valve core is connected with a pushing piece used for pushing the opening valve core to slide.

The beneficial effect of this scheme does:

1. the opening valve core in the scheme can seal the communication port, the air inlet cavity is communicated with the air storage tank, and when compressed air is introduced into the air storage tank by the air delivery piece, the air simultaneously enters the air inlet cavity, so that the pressure intensity in the air inlet cavity and the pressure intensity in the air storage tank are synchronously increased; during the experiment, will open the case and slide to one side far away from the intercommunication mouth, can be through the intercommunication mouth with the chamber intercommunication of admitting air with launch, the compressed gas in admitting air chamber and the gas holder gets into the intracavity of launching fast, makes the piston rod of launching the cylinder slide out fast. Compared with the existing valve, when the valve core is opened to seal the communication port, the valve core is not easy to damage in a high-pressure state, and the service life of the ejection device is prolonged.

2. In this scheme, can directly promote through the impeller and open the case slip for the intercommunication mouth seal with open more convenient, when pressure is great, need improve the sealed effect to the intercommunication mouth moreover, through the impeller increase open the case with the pressure of intercommunication mouth can, sealed effect can be along with the pressure synchronous increase, thereby satisfy the impact type of different pressure requirements, launch the type test.

3. When the diameter of the communicating port is larger, the diameter of the valve core is synchronously increased to seal the communicating port without considering whether the size of the communicating port can be adapted to the specification of the valve or not, so that the assembly and the production are simpler.

Furthermore, a connecting assembly is arranged between the opening valve core and the pushing piece, the connecting assembly comprises a cross adapter A and a cross adapter B, the cross adapter A is connected with the pushing piece, a first guide groove is formed in one end, far away from the communication port, of the opening valve core, a second guide groove is formed in one end, close to the communication port, of the cross adapter A, and the included angle formed by the projection of the first guide groove along the axial direction of the cross adapter B and the second guide groove is smaller than or equal to 90 degrees; the two ends of the cross adapter B are fixed with guide blocks, and the two guide blocks are respectively positioned in the first guide groove and the second guide groove.

The beneficial effect of this scheme does: the thread has machining error when processing, if open and pass through threaded connection between case and the impeller, then open the axiality between case and the impeller and can make the compressed gas who opens the case and receive and the effort of impeller inhomogeneous, lead to taking place to warp, unable fine closed intercommunication mouth. The case of opening in this scheme is connected with the impeller through cross adapter A and cross adapter B, and first guide way and second guide way are fixed a position cross adapter B in X axle and Y axle direction through the guide block when using, guarantee to open the case, have better axiality between cross adapter A and the impeller for it is even to open the case atress, can not warp under the effect of pressure.

Further, two guide blocks respectively with first guide way and second guide way sliding fit, and the guide block is kept away from the width of cross adapter B one end and is greater than the width that is close to cross adapter B one end, and after the installation, when receiving axial pulling force, the guide block in this scheme can not deviate from in first guide way and the second guide way, guarantees that the impeller can drive and open the case and slide.

The beneficial effect of this scheme does: when the valve core is installed, the guide block slides along the first guide groove and the second guide groove, so that the valve core, the cross adapter B and the cross adapter A can be opened quickly and connected in sequence.

Further, the guide block is T-shaped in cross section.

The beneficial effect of this scheme does: the guide block in this scheme can not deviate from in first guide way and the second guide way, and convenient processing.

Further, the cross section of the guide block is dovetail-shaped.

Furthermore, the pushing piece is positioned outside the air inlet cavity, and one end, far away from the communication port, of the open valve core penetrates through the air inlet cavity and the side wall opposite to the communication port and is in sliding seal with the side wall.

The beneficial effect of this scheme does: the use of the pushing piece in the scheme can not be influenced by the pressure in the air inlet cavity, and the failure rate of the pushing piece can be reduced.

Further, the diameter of one end, close to the communication opening, of the opening valve core is larger than that of one end, far away from the communication opening, of the opening valve core.

The beneficial effect of this scheme does: when the impeller drives the valve core to one side far away from the communicating port, the opened valve core in the scheme can not be separated from the air inlet cavity, and compressed air leakage is avoided.

Furthermore, the section of the opening valve core along the axial direction is T-shaped, an annular limiting side wall is formed on the opening valve core, and an annular cushion pad is fixed on the limiting side wall.

The beneficial effect of this scheme does: when the valve core is opened and the valve core slides to one side far away from the communicating port, the cushion pad avoids opening the direct contact and collision of the valve core and the inner wall of the air inlet cavity, and avoids opening the damage of the valve core and the inner wall of the air inlet cavity.

Further, a valve core sleeve is arranged between the side wall of the air inlet cavity opposite to the communicating port and the limiting side wall, the valve core sleeve is sleeved on the opening valve core and detachably connected with the inner wall of the air inlet cavity, and the opening valve core is in sliding fit with the valve core sleeve.

The beneficial effect of this scheme does: the valve core sleeve can play a role in guiding the sliding of the opened valve core, and the opened valve core is prevented from being inclined.

Furthermore, a sealing gasket is fixed at one end of the opening valve core facing the communication port.

The beneficial effect of this scheme does: after the valve core is opened and the side wall of the communicating opening is pressed, the sealing gasket can seal a gap between the opened valve core and the side wall, and the sealing effect is further improved.

Drawings

Fig. 1 is a front vertical sectional view of embodiment 1 of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is a perspective view of the opening spool and coupling assembly of fig. 2.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the ejection device comprises an ejection cylinder 1, an ejection cavity 11, an air inlet cavity 12, a piston 13, a cylinder end cover middle 2, a communication port 21, an opening valve core 3, a limiting side wall 31, a first guide groove 32, a cushion pad 4, a valve core sleeve 5, a pushing piece 6, a positioning sleeve 61, an air storage tank 7, an opening 71, a cross adapter A8, a second guide groove 81, a convex block 82, a cross adapter B9 and a guide block 91.

Examples

An ejection device, as shown in fig. 1, 2, and 3, includes an ejection cylinder 1, an air tank 7, an air supply member (not shown in the drawings), an opening valve core 3, a pushing member 6, and a connection assembly, where the air supply member is communicated with the air tank 7 through a pipeline, and in this embodiment, the air supply member is an air compressor, and in actual implementation, the air supply member may also be an air pump.

The ejection cylinder 1 is internally provided with an ejection cavity 11 and an air inlet cavity 12, specifically, in the embodiment, the cylinder end cover 2 is installed in the inner cavity of the ejection cylinder 1 through a screw, the inner cavity of the ejection cylinder 1 is divided into the ejection cavity 11 located on the left side of the cylinder end cover 2 and the air inlet cavity 12 located on the right side of the cylinder end cover 2, and the cylinder end cover 2 is provided with a communication port 21 for communicating the ejection cavity 11 with the air inlet cavity 12.

The piston 13 of the ejection cylinder 1 is in sliding seal with the ejection cavity 11, the piston rod is located on the left side of the piston 13, and the piston rod extends out from the left end of the ejection cylinder 1, specifically, the connection modes of the piston 13, the piston rod and the ejection cylinder 1 are the same as those in the prior art, and are not repeated in this embodiment.

The opening valve core 3 is opposite to the communication port 21, the section of the opening valve core 3 along the vertical direction is T-shaped, namely the diameter of the left end of the opening valve core 3 is larger than that of the right end, and the diameter of the left end of the opening valve core 3 is larger than the caliber of the communication port 21. The side wall of the opening valve core 3 forms a limit side wall 31 which is parallel to the inner wall of the right side of the air inlet cavity 12, and an annular buffer cushion 4 is glued on the limit side wall 31. The right end of the opening valve core 3 transversely penetrates through the right side wall of the air inlet cavity 12 and is in sliding seal with the right side wall; open and be equipped with case cover 5 on the case 3, case cover 5 in this embodiment is located between the right side wall of chamber 12 of admitting air and spacing lateral wall 31 to install on the right side inner wall of chamber 12 of admitting air through the screw, case cover 5 in this embodiment is copper, and with open case 3 sliding seal, leads the slip of opening case 3, and blotter 4 offsets with the left end of case cover 5, carries on spacingly to opening case 3. In practical implementation, still can be opening the left end cementing of case 3 and seal up to the increase is opened case 3 and is to the sealed effect of intercommunication mouth 21, and is concrete, and blotter 4 and sealed the pad all adopt the elasticity rubber material.

The pushing piece 6 is located on the right side of the ejection cylinder 1, a positioning sleeve 61 is arranged between the pushing piece 6 and the ejection cylinder 1, the positioning sleeve 61 is I-shaped in vertical section, through grooves are formed in the top and the bottom of the positioning sleeve, the positioning sleeve 61 is sleeved at the left end of the opening valve core 3, the left end of the positioning sleeve 61 is fixed to the right end of the ejection cylinder 1 through screws, and the pushing piece 6 is mounted at the right end of the positioning sleeve 61 through screws. In practical implementation, a rack may be further provided, the housing and the pushing member 6 of the ejection cylinder 1 may be mounted on the rack, or the housing and the pushing member 6 of the ejection cylinder 1 may be fixed to a surrounding rack or other devices, as long as the housing and the pushing member 6 of the ejection cylinder 1 can be positioned.

Push member 6 in this embodiment adopts the cylinder, and coupling assembling is located and opens between the piston rod of case 3 and push member 6, and is specific, and coupling assembling includes cross adapter A8 and cross adapter B9, and the left end of push member 6's piston rod is equipped with the recess, and cross adapter A8's right-hand member integrated into one piece has lug 82, and lug 82 is located the recess and with recess threaded connection. The cross joint B9 is located on the left side of the cross joint A8, a first guide groove 32 is formed in the right end of the opening valve core 3, a second guide groove 81 is formed in the left end of the cross joint A8, the first guide groove 32 and the second guide groove 81 penetrate through the opening valve core 3 and the cross joint A8 in the radial direction respectively, and the right projection of the first guide groove 32 is perpendicular to the second guide groove 81. The left end of cross adapter B9 and the homogeneous body shaping of right-hand member have guide block 91, the width that cross adapter B9 one end was kept away from to guide block 91 is greater than the width that is close to cross adapter B9 one end, it is specific, guide block 91 in this embodiment is the T shape, in the time of practical implementation, first guide way 32, second guide way 81 and guide block 91 still can be the dovetail shape, make two guide blocks 91 slide into first guide way 32 and second guide way 81 respectively in the back, open case 3, relative movement can not appear along the axial between cross adapter B9 and the cross adapter A8, guarantee that impeller 6 can drive to open case 3 and slide. In this embodiment, first guide way 32 and second guide way 81 are fixed a position the X axle of cross adapter B9 and the direction of Y axle respectively for open case 3 and in the slip in-process, open the aversion that can not take place X axle and Y axle direction between case 3, cross adapter B9 and the cross adapter A8, guarantee to open and have better axiality between case 3, cross adapter B9 and the cross adapter A8. The ejection cavity 11, the cylinder end cover middle 2, the communication port 21, the air inlet cavity 12, the opening valve core 3, the cross joint B9, the cross joint A8 and the piston rod of the pushing piece 6 in the embodiment are all coaxial.

The air storage tank 7 in this embodiment is located above the ejection cylinder 1, and the bottom of the air storage tank 7 and the top of the air inlet cavity 12 are both provided with aligned and communicated openings 71.

The specific implementation process is as follows:

before the test, the pushing piece 6 is manually started to push the opening valve core 3 to the left, so that the left end of the opening valve core 3 is pressed on the right wall of the cylinder end cover 2 to seal the communication port 21, then the pushing piece 6 is closed, the air feeding piece is opened, compressed air is fed into the air storage tank 7, and the air synchronously enters the air inlet cavity 12 through the opening 71. When the pressure in the air inlet cavity 12 and the air storage tank 7 meets the requirement, the air supply piece is closed, the pushing piece 6 is started, the valve core 3 is controlled to be opened through the pushing piece 6 to slide rightwards, the valve core 3 is opened to release the communicating port 21, compressed air in the air inlet cavity 12 and the air storage tank 7 rapidly enters the space on the left side of the piston 13 of the ejection cylinder 1 from the communicating port 21, and the piston 13 and the piston rod of the ejection cylinder 1 rapidly slide leftwards.

When the impact energy of the ejection test needs to be further increased, the pressure in the air inlet cavity 12 and the air storage tank 7 needs to be increased, at the moment, the opening valve core 3 is further pushed leftwards through the pushing piece 6, the pressure between the left end of the opening valve core 3 and the cylinder end cover 2 is increased, namely, under the condition that the pressure is increased, compressed air cannot leak from the communicating port 21, and the requirement for higher pressure can be met.

After the diameter increase of the intercommunication mouth 21 of design, the diameter of opening the case 3 left end of increase simultaneously for open the case 3 can cover and seal the intercommunication mouth 21 can, compare with the direct valve that uses, the diameter of intercommunication mouth 21 in this embodiment can set up wantonly, need not consider the size of valve and Buddha can the problem of installation, design and production are more convenient.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be defined by the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an ejection device, includes ejection cylinder, gas holder and air feed spare, air feed spare and gas holder intercommunication, be equipped with the ejection chamber in the ejection cylinder, the ejection intracavity sliding seal has a piston, be fixed with piston rod, its characterized in that on the piston: an air inlet cavity is further formed in the ejection cylinder and is communicated with the air storage tank, and a communication opening for communicating the ejection cavity with the air inlet cavity is formed in the ejection cylinder; an opening valve core is arranged in the air inlet cavity, the opening valve core is opposite to the communicating port and used for sealing the communicating port, and the opening valve core is connected with a pushing piece used for pushing the opening valve core to slide.

2. The ejection device of claim 1, wherein: a connecting assembly is arranged between the opening valve core and the pushing piece, the connecting assembly comprises a cross adapter A and a cross adapter B, the cross adapter A is connected with the pushing piece, a first guide groove is formed in one end, far away from the communicating port, of the opening valve core, a second guide groove is formed in one end, close to the communicating port, of the cross adapter A, and the included angle formed by the axial projection of the first guide groove along the cross adapter B and the second guide groove is smaller than or equal to 90 degrees; the two ends of the cross adapter B are fixed with guide blocks, and the two guide blocks are respectively positioned in the first guide groove and the second guide groove.

3. The ejection device of claim 2, wherein: two guide blocks respectively with first guide way and second guide way sliding fit, and the width that cross adapter B one end was kept away from to the guide block is greater than the width that is close to cross adapter B one end.

4. The ejection device of claim 3, wherein: the cross section of the guide block is T-shaped.

5. The ejection device of claim 3, wherein: the cross section of the guide block is dovetail-shaped.

6. The ejection device of claim 2, wherein: the pushing piece is positioned outside the air inlet cavity, and one end, far away from the communication port, of the opened valve core penetrates through the air inlet cavity and the side wall opposite to the communication port and is in sliding seal with the side wall.

7. The ejection device of claim 6, wherein: the diameter of the end, close to the communicating opening, of the opening valve core is larger than that of the end, far away from the communicating opening, of the opening valve core.

8. The ejection device of claim 7, wherein: the cross section of the opening valve core along the axial direction is T-shaped, an annular limiting side wall is formed on the opening valve core, and an annular buffer pad is fixed on the limiting side wall.

9. The ejection device of claim 8, wherein: and a valve core sleeve is arranged between the side wall of the air inlet cavity opposite to the communicating port and the limiting side wall, the valve core sleeve is sleeved on the opening valve core and detachably connected with the inner wall of the air inlet cavity, and the opening valve core is in sliding fit with the valve core sleeve.

10. The ejection device of claim 8, wherein: and a sealing gasket is fixed at one end of the opened valve core facing the communication port.