Impact device and impact test equipment

Abstract

The embodiment of the invention discloses an impact device and impact test equipment, the impact device comprises an air cylinder, an impact part, a shell, an air inlet tank and a valve assembly, one end of the impact part extends into the air cylinder and is in sliding connection with the air cylinder, the other end of the impact part extends out of the air cylinder, the shell is provided with a connecting wall, and the connecting wall is connected with the air inlet tank. A first air inlet cavity is defined by the connecting wall, the impact part and the air cylinder, an air inlet is formed in the connecting wall, a second air inlet cavity is formed in the shell, the air inlet is used for communicating the first air inlet cavity with the second air inlet cavity, the air inlet tank is communicated with the second air inlet cavity, and the valve assembly is arranged in the shell and used for opening or closing the air inlet. The impact device provides power through high-pressure gas in the gas inlet tank, the machining technology maturity of a pneumatic mode is high, the structure is stable and reliable, speed control is accurate, later maintenance is convenient, and a stable and controllable power source can be provided for the impact device with the large bearing capacity; the problem that follow-up maintenance is difficult due to the limited machining technology of the domestic hydraulic servo valve is solved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of impact testing, and in particular, to an impact device and impact testing equipment. Background Art

[0002] Impact test equipment is used for mechanical environmental testing of test pieces, and the impact device is used for impact load control, which is a key part of the impact test equipment. With the development of ships and their electromechanical equipment, higher requirements are placed on the load-bearing weight of impact test equipment. In related technologies, for test pieces with a large load-bearing capacity exceeding 2.7 tons, the propulsion method of the impact test equipment is generally hydraulic energy storage, which usually requires the use of multiple high-speed hydraulic servo valves with a flow rate of not less than 3000 / min in parallel. However, due to the limitations of the domestic processing technology of hydraulic servo valves, the use of small batches of customized hydraulic servo valves is prone to problems such as poor consistency and difficulty in subsequent maintenance. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, a first aspect of the present invention provides an impact device.

[0005] A second aspect of the present invention provides an impact testing device.

[0006] In view of this, according to the first aspect of the technical solution of the present application, an impact device is proposed, which includes: a cylinder, an impact piece, a shell, an air inlet tank and a valve assembly, one end of the impact piece extends into the cylinder and is slidably connected to the cylinder, the other end of the impact piece extends out of the cylinder, the shell is provided with a connecting wall, the connecting wall and the impact piece and the cylinder are enclosed to form a first air inlet chamber, an air inlet port is provided on the connecting wall, a second air inlet chamber is formed in the shell, the air inlet port is used to connect the first air inlet chamber and the second air inlet chamber, the air inlet tank is connected to the second air inlet chamber, the valve assembly is arranged in the shell, and the valve assembly is used to open or close the air inlet port.

[0007] In some technical solutions provided in the present application, optionally, the valve assembly includes: a cylinder body and a piston module, the cylinder body is connected to the shell, the cylinder body is provided with an air vent, one end of the piston module extends out of the cylinder body for opening or closing the air inlet, the other end of the piston module is slidably connected to the inner wall of the cylinder body, and divides the cylinder body into a third air inlet chamber and a fourth air inlet chamber, the third air inlet chamber is connected to the second air inlet chamber, and the fourth air inlet chamber is connected to the air vent.

[0008] In some technical solutions provided in the present application, optionally, the piston module includes: a seal and a piston member, the seal is arranged outside the cylinder body and is used to open or close the air inlet, one end of the piston member is connected to the seal, and the other end is slidably connected to the inner wall of the cylinder body.

[0009] In some technical solutions provided in the present application, optionally, the piston module further includes an elastic member, and two ends of the elastic member are respectively connected to the sealing member and the piston member.

[0010] In some technical solutions provided in the present application, optionally, the piston module also includes a buffer component, which is connected to the piston component, and the buffer component is arranged in the fourth air inlet cavity and located between the piston component and the inner wall of the cylinder body.

[0011] In some technical solutions provided in the present application, optionally, the impact device also includes an exhaust member, the exhaust member is connected to the cylinder, an exhaust port is provided on the cylinder, and the exhaust member cover is provided on the exhaust port.

[0012] In some technical solutions provided in the present application, optionally, the impact device further includes an exhaust tank, and the exhaust tank is connected to the end of the cylinder connected to the impact piece.

[0013] In some technical solutions provided in the present application, optionally, the impact device also includes: an impact part, a limiter and a buffer pad, the impact part is connected to the end of the impact part, the limiter is connected to one end of the impact part connected to the cylinder, along the radial direction of the cylinder, the limiter extends out of the cylinder, the impact part extends out of the impact part, the buffer pad is connected to the limiter, and the buffer pad is located between the impact part and the limiter.

[0014] In some technical solutions provided in the present application, optionally, the impact device further includes a regulating module, and the regulating module is used to adjust a preset pressure of the air inlet tank.

[0015] A second technical solution of the present application provides an impact test device, which includes the impact device provided by any one of the first technical solutions of the present application.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The impact device is powered by the high-pressure gas in the air intake tank. The pneumatic method has a high degree of processing maturity, a stable and reliable structure, accurate speed control, and convenient later maintenance. It can provide a stable and controllable power source for impact devices with large loads, avoiding the problems of poor consistency and subsequent maintenance difficulties caused by the limited processing technology of domestic hydraulic servo valves. In addition, after the high-pressure gas enters the cylinder through the valve assembly, it directly drives the impact piece to move, which simplifies the process of power transmission, reduces the energy loss generated in power transmission, and improves the impact strength and sensitivity of the impact piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 One of the structural schematic diagrams of an impact device provided in an embodiment of the present application;

[0020] Figure 2 A second structural schematic diagram of an impact device according to an embodiment of the present application;

[0021] Figure 3 A schematic diagram showing a structure of an impact member in a retracted state according to an embodiment of the present application;

[0022] Figure 4 A schematic structural diagram showing an impact member in an extended state according to an embodiment of the present application is shown.

[0023] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0024] 10 impact device, 100 cylinder, 110 first air inlet chamber, 120 exhaust port, 200 impact member, 300 shell, 310 connecting wall, 320 air inlet port, 330 second air inlet chamber, 400 air inlet tank, 500 valve assembly, 510 cylinder body, 511 air vent, 512 third air inlet chamber, 513 fourth air inlet chamber, 520 piston module, 521 sealing member, 522 piston member, 523 elastic member, 524 buffer member, 600 exhaust member, 700 exhaust tank, 810 impact part, 820 limit member, 830 buffer pad, 900 bracket. DETAILED DESCRIPTION

[0025] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0026] The first embodiment of the present application provides an impact device 10, such as Figures 1 to 4As shown, the impact device 10 includes: a cylinder 100, an impact piece 200, a shell 300, an air inlet tank 400 and a valve assembly 500. One end of the impact piece 200 extends into the cylinder 100 and is slidably connected to the cylinder 100, and the other end of the impact piece 200 extends out of the cylinder 100. The shell 300 is provided with a connecting wall 310. The connecting wall 310, the impact piece 200 and the cylinder 100 are enclosed to form a first air inlet chamber 110. The connecting wall 310 is provided with an air inlet port 320. A second air inlet chamber 330 is formed in the shell 300. The air inlet port 320 is used to connect the first air inlet chamber 110 and the second air inlet chamber 330. The air inlet tank 400 is connected to the second air inlet chamber 330. The valve assembly 500 is arranged in the shell 300, and the valve assembly 500 is used to open or close the air inlet port 320.

[0027] In this embodiment, the impact device 10 is used as a propulsion system of the impact test equipment to impact the test piece. The load of the test piece exceeds a large load threshold. The large load threshold meets the impact test standard. The large load threshold may be 10t.

[0028] The cylinder 100 wraps one end of the impact piece 200 so that the bottom of the impact piece 200 fits against the inner wall of the cylinder 100. The impact piece 200 is constrained by the inner wall of the cylinder 100 and can only move vertically up and down. The end of the impact piece 200 extends out of the cylinder 100 to impact the test piece. Specifically, the impact piece 200 is a columnar structure to improve the structural strength and impact strength of the impact piece 200.

[0029] A connecting wall 310 is provided on the shell 300, and the connecting wall 310 covers the cylinder 100, so that the connecting wall 310, the impact piece 200 and the cylinder 100 form a first air intake chamber 110, and a second air intake chamber 330 is formed in the shell 300. The air inlet 320 on the connecting wall 310 can connect the first air intake chamber 110 and the second air intake chamber 330, so that the shell 300 is connected with the cylinder 100.

[0030] Exemplarily, the connecting wall 310 may be a top wall of the housing 300, and the connecting wall 310 is connected to the bottom of the cylinder 100. The housing 300 is detachably connected to the cylinder 100, which facilitates the maintenance and replacement of the housing 300.

[0031] The air inlet tank 400 is connected to the second air inlet chamber 330. The air inlet tank 400 is used to contain high-pressure gas. After the high-pressure gas enters the cylinder 100, it can push the impact piece 200 to move in the direction of extending out of the cylinder 100, so that the impact piece 200 impacts the test piece. The air inlet tank 400 provides a power source for the impact device 10.

[0032] The valve assembly 500 in the housing 300 can open or close the air inlet 320. When the valve assembly 500 avoids the air inlet 320, the air inlet 320 is in an open state, the first air inlet chamber 110 and the second air inlet chamber 330 are connected, and the high-pressure gas in the air inlet tank 400 can flow through the second air inlet chamber 330 and enter the first air inlet chamber 110. The high-pressure gas pushes the impact piece 200 to move in the direction of extending the cylinder 100, so that the impact piece 200 performs an impact action on the test piece. When the valve assembly 500 blocks the air inlet 320, the air inlet 320 is in a closed state, the first air inlet chamber 110 and the second air inlet chamber 330 are isolated from each other, and the impact piece 200 stays in place.

[0033] The impact device 10 is powered by the high-pressure gas in the air inlet tank 400. The pneumatic method has a high degree of processing maturity, a stable and reliable structure, accurate speed control, and convenient later maintenance. It can provide a stable and controllable power source for the impact device 10 with a large load capacity, avoiding the problems of poor consistency and subsequent maintenance difficulties caused by the limited processing technology of domestic hydraulic servo valves. In addition, after the high-pressure gas enters the cylinder 100 through the valve assembly 500, it directly drives the impact piece 200 to move, which simplifies the process of power transmission, reduces the energy loss generated in the power transmission, and improves the impact strength and sensitivity of the impact piece 200.

[0034] Exemplarily, the impact device 10 further includes a bracket 900 , and the cylinder 100 and the air intake tank 400 are fixed on the bracket 900 .

[0035] In some embodiments provided in this application, Figure 1 As shown, optionally, the valve assembly 500 includes: a cylinder body 510 and a piston module 520, the cylinder body 510 is connected to the shell 300, the cylinder body 510 is provided with an air vent 511, one end of the piston module 520 extends out of the cylinder body 510, and is used to open or close the air inlet 320, the other end of the piston module 520 is slidingly connected to the inner wall of the cylinder body 510, and divides the cylinder body 510 into a third air inlet chamber 512 and a fourth air inlet chamber 513, the third air inlet chamber 512 is connected to the second air inlet chamber 330, and the fourth air inlet chamber 513 is connected to the air vent 511.

[0036] In this embodiment, a part of the cylinder 510 is disposed in the housing 300, and the upper end of the piston module 520 extends out of the cylinder 510 to cooperate with the air inlet 320 to open or close the air inlet 320 and control the communication state between the first air inlet chamber 110 and the second air inlet chamber 330. The lower end of the piston module 520 extends into the cylinder 510 to separate the cylinder 510 into a third air inlet chamber 512 and a fourth air inlet chamber 513. The piston module 520 is slidably and sealedly connected to the inner wall of the cylinder 510, so that the volumes of the third air inlet chamber 512 and the fourth air inlet chamber 513 can change with the movement of the piston module 520.

[0037] The third air inlet chamber 512 is connected to the second air inlet chamber 330, and the fourth air inlet chamber 513 is connected to the vent 511 of the cylinder body 510. The vent 511 can input or discharge high-pressure gas into the fourth air inlet chamber 513 to achieve the air intake or exhaust function. The gas in the third air inlet chamber 512 and the fourth air inlet chamber 513 generates a pressure difference on both sides of the piston module 520, and the pressure difference controls the up and down movement of the piston module 520, thereby opening or closing the air inlet 320. The movement of the piston module 520 is controlled by high-pressure gas, and the control method is simple and convenient, and the response is rapid, thereby improving the control efficiency of the piston module 520.

[0038] It can be understood that when the valve assembly 500 is closed, high-pressure gas is quickly filled into the fourth air inlet chamber 513 through the air vent 511, the air pressure in the fourth air inlet chamber 513 increases, the piston module 520 moves upward under the pressure of the gas in the fourth air inlet chamber 513, and the upper end of the piston module 520 blocks the air inlet 320, so that the gas in the second air inlet chamber 330 cannot enter the cylinder 100. When the valve assembly 500 is opened, the gas in the fourth air inlet chamber 513 is discharged through the air vent 511, the air pressure in the fourth air inlet chamber 513 decreases, and the gas in the second air inlet chamber 330 enters the third air inlet chamber 512. The piston module 520 moves downward under the pressure of the gas in the third air inlet chamber 512, and the upper end of the piston module 520 opens the air inlet 320, so that the gas in the second air inlet chamber 330 quickly enters the first air inlet chamber 110 through the air inlet 320, and pushes the impact member 200 to move upward rapidly.

[0039] Exemplarily, a through hole is provided on the bottom wall of the shell 300 , and the cylinder body 510 is inserted into the through hole. The cylinder body 510 is detachably connected to the bottom wall of the shell 300 , and the vent 511 is located on the bottom wall of the cylinder body 510 .

[0040] In some embodiments provided in this application, Figure 1 As shown, optionally, the piston module 520 includes: a seal 521 and a piston member 522, the seal 521 is arranged outside the cylinder body 510, and is used to open or close the air inlet 320, one end of the piston member 522 is connected to the seal 521, and the other end is slidably connected to the inner wall of the cylinder body 510.

[0041] In this embodiment, the sealing member 521 is located above the piston member 522 , and the sealing member 521 is matched with the air inlet 320 to seal the air inlet 320 , thereby improving the air tightness of the position of the air inlet 320 and improving the control accuracy of the valve assembly 500 .

[0042] The upper end of the piston 522 is connected to the sealing member 521, and the lower end of the piston 522 is slidably sealed and connected to the inner wall of the cylinder 510, so as to divide the cylinder 510 into a third air inlet chamber 512 and a fourth air inlet chamber 513. When the valve assembly 500 is closed, the piston 522 moves upward, and the sealing member 521 blocks the air inlet 320. When the valve assembly 500 is opened, the piston 522 moves downward, and the sealing member 521 opens the air inlet 320.

[0043] Exemplarily, the sealing member 521 is conical in shape, and a sealing ring is provided on the sealing member 521 .

[0044] In some embodiments provided in this application, Figure 1 As shown, optionally, the piston module 520 further includes an elastic member 523 , and two ends of the elastic member 523 are respectively connected to the sealing member 521 and the piston member 522 .

[0045] In this embodiment, an elastic member 523 is provided between the sealing member 521 and the piston member 522. The elastic member 523 can produce elastic deformation when the valve assembly 500 is opened, and provide elastic force to the piston member 522 and the sealing member 521. When air is introduced into the cylinder 100, the valve assembly 500 needs to be opened, and the elastic member 523 provides an upward elastic force for the piston member 522, which increases the force required for the piston member 522 to move downward, thereby increasing the gas pressure in the second air intake chamber 330, and increasing the pressure difference between the first air intake chamber 110 and the second air intake chamber 330, so that when the valve assembly 500 is opened, the initial pressure of the gas filled in the first air intake chamber 110 is higher. In addition, at the end of the air intake process, the elastic member 523 pushes the sealing member 521 to move upward, and the auxiliary sealing member 521 quickly returns to the initial position to seal the air inlet 320, shortening the duration of the air intake process and optimizing the acceleration effect of the impact member 200.

[0046] Exemplarily, the elastic member 523 may be a spring.

[0047] Exemplarily, the air inlet 320 , the sealing member 521 , the piston member 522 , the elastic member 523 and the cylinder body 510 are all coaxially symmetrically arranged.

[0048] In some embodiments provided in this application, Figure 1 As shown, optionally, the piston module 520 further includes a buffer member 524 , which is connected to the piston member 522 . The buffer member 524 is disposed in the fourth air inlet cavity 513 and is located between the piston member 522 and the inner wall of the cylinder body 510 .

[0049] In this embodiment, a buffer 524 is provided in the fourth air inlet chamber 513, and the buffer 524 is detachably connected to the bottom of the piston 522. When the valve assembly 500 is opened, the volume of the fourth air inlet chamber 513 is reduced, and the piston 522 quickly approaches the bottom wall of the cylinder 510. A buffer 524 is provided between the piston 522 and the bottom wall of the cylinder 510, so that the buffer 524 can prevent the piston 522 from directly contacting the bottom wall of the cylinder 510, provide buffer protection for the piston 522, and extend the service life of the piston 522.

[0050] In some embodiments provided in this application, Figure 2 As shown, optionally, the impact device 10 further includes an exhaust member 600 , which is connected to the cylinder 100 , and an exhaust port 120 is disposed on the cylinder 100 , and the exhaust member 600 is covered on the exhaust port 120 .

[0051] In this embodiment, after the impact test is completed, the exhaust port 120 on the cylinder 100 is opened to release the gas in the cylinder 100, so that the impact member 200 falls back to the initial position. The exhaust member 600 blocks the exhaust port 120, so that the gas discharged from the exhaust port 120 impacts the exhaust member 600 to reduce the flow rate. The exhaust member 600 hinders the flow of air, reduces the exhaust speed, and causes the impact member 200 to fall back slowly, thereby improving the safety and stability of the impact member 200 falling back.

[0052] In some embodiments provided in this application, Figure 2 As shown, optionally, the impact device 10 further includes an exhaust tank 700 , and the exhaust tank 700 is communicated with the end of the cylinder 100 connected to the impact member 200 .

[0053] In this embodiment, an exhaust tank 700 is provided at the upper end of the cylinder 100. After the impact piece 200 moves to the set impact stroke, the impact piece 200 hits the workbench and rebounds at a certain speed. The first air inlet chamber 110 is connected to the exhaust tank 700. The high-pressure gas in the cylinder 100 is quickly released into the exhaust tank 700, which quickly reduces the air pressure in the first air inlet chamber 110, avoiding a secondary impact after the impact ends, and causing the impact piece 200 to slowly fall back to its initial position.

[0054] For example, the exhaust port 120 may be in communication with the exhaust tank 700 , and the impact stroke of the impact member 200 may be 1000 mm.

[0055] In some embodiments provided in this application, Figure 2 , Figure 3 and Figure 4As shown, optionally, the impact device 10 also includes: an impact part 810, a limiting member 820 and a buffer pad 830, the impact part 810 is connected to the end of the impact member 200, the limiting member 820 is connected to the cylinder 100 and one end of the impact member 200 is connected, along the radial direction of the cylinder 100, the limiting member 820 extends out of the cylinder 100, the impact part 810 extends out of the impact member 200, the buffer pad 830 is connected to the limiting member 820, and the buffer pad 830 is located between the impact part 810 and the limiting member 820.

[0056] In this embodiment, the impact portion 810 is disposed at the upper end of the impact member 200 , and the stopper 820 is disposed at the upper end of the cylinder 100 . Figure 2 In the figure, the arrow at Y points to the radial direction of the cylinder 100. Along the radial direction of the cylinder 100, the limiting member 820 extends out of the cylinder 100, and the impact part 810 extends out of the impact member 200. When the impact member 200 falls back, the impact part 810 abuts against the buffer pad 830. The buffer pad 830 provides buffering protection for the impact part 810. The limiting member 820 limits the impact part 810 to limit the falling position of the impact member 200.

[0057] Exemplarily, the impact piece 200 and the impact portion 810 are an integrated structure, and the total mass may be 3.5 tons.

[0058] In some embodiments provided in the present application, optionally, the impact device 10 further includes a regulating module, and the regulating module is used to adjust the preset pressure of the air intake tank 400 .

[0059] In this embodiment, the regulating module can adjust the preset pressure of the air inlet tank 400 to control the impact speed of the impact piece 200 and adjust the loading waveform parameters. The derivation formula of the impact piece 200 shooting speed is as follows:

[0060] Since the impact time is very short and the cylinder 100 is isolated from the outside, the process of high-pressure gas pushing the impact member 200 to move can be equivalent to an adiabatic process, satisfying: Wherein, p0 and V0 are the initial inflation pressure and volume in the cylinder 100, p1 and V1 are the pressure and volume after the movement in the cylinder 100, and a is the insulation coefficient, which is a constant and is taken as 1.4 for the air medium.

[0061] Driven by the high-pressure gas, the movement of the impact member 200 satisfies Newton's second law: Wherein, m1 is the total mass of the impact member 200, S is the cross-sectional area of ​​the impact member 200 in the cylinder 100, x is the upward displacement of the impact member 200, g is the gravitational acceleration, and μ is the reduced resistance coefficient. When the impact member 200 moves upward, considering the resistance effects of gravity and friction, μ>1.

[0062] The impact piece 200 hits the work surface at a certain speed v1. According to the momentum theorem, after the impact:

[0063]

[0064] Wherein, m1 is the mass of the impact member 200, m2 is the mass of the work surface (kg); v1 is the initial velocity of the impact member 200 (m / s), v1′ is the rebound velocity of the impact member 200; v2 is the velocity of the work surface, and e is the coefficient of restitution.

[0065] Assuming the starting point of the movement is 0, when the impact member 200 moves to the x position,

[0066] p1(Sx+V0) a =p0(V0) a ;

[0067] Then there is

[0068]

[0069] Wherein, k is the initial length of the cylinder 100, k=V0 / S.

[0070] After finishing, we can get:

[0071]

[0072] After integration, we get:

[0073]

[0074] The velocity of the cylinder 100 at any position x is obtained as:

[0075]

[0076] The above expression introduces the secondary work coefficient of the impact member 200 movement It can be deduced that the equation for controlling the firing speed of the impact member 200 according to the initial inflation pressure is:

[0077]

[0078] in: is the secondary work calculation coefficient, which is taken as 1.2 for air medium, and Sx is the volume of the cylinder 100.

[0079] A second aspect embodiment of the present application provides an impact test device, which includes the impact device 10 provided by any one of the first aspect embodiments of the present application.

[0080] In this embodiment, the impact testing equipment may be a dual wave impact testing machine.

[0081] It should be noted that the impact test equipment includes the impact device 10 provided by any one of the above embodiments of the present application, and thus has all the beneficial technical effects of the above impact device 10, which will not be described here in detail to avoid repetition.

[0082] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0084] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0085] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An impact device (10), characterized in that: include: Cylinder (100); An impact piece (200), one end of the impact piece (200) extends into the cylinder (100) and is slidably connected to the cylinder (100), and the other end of the impact piece (200) extends out of the cylinder (100); A housing (300), wherein the housing (300) is provided with a connecting wall (310), wherein the connecting wall (310), the impact member (200) and the cylinder (100) enclose a first air intake chamber (110), an air intake port (320) is provided on the connecting wall (310), and a second air intake chamber (330) is formed in the housing (300), wherein the air intake port (320) is used to connect the first air intake chamber (110) and the second air intake chamber (330); An air intake tank (400), the air intake tank (400) being in communication with the second air intake cavity (330); A valve assembly (500) is disposed in the housing (300), and the valve assembly (500) is used to open or close the air inlet (320).

2. The impact device (10) according to claim 1, characterized in that The valve assembly (500) comprises: A cylinder body (510) connected to the housing (300), wherein the cylinder body (510) is provided with a vent (511); A piston module (520), one end of the piston module (520) extends out of the cylinder body (510) and is used to open or close the air inlet (320), and the other end of the piston module (520) is slidably connected to the inner wall of the cylinder body (510) and divides the cylinder body (510) into a third air inlet chamber (512) and a fourth air inlet chamber (513), the third air inlet chamber (512) is connected to the second air inlet chamber (330), and the fourth air inlet chamber (513) is connected to the vent (511).

3. The impact device (10) according to claim 2, characterized in that The piston module (520) comprises: A sealing member (521), disposed outside the cylinder body (510), and used for opening or closing the air inlet (320); A piston member (522), one end of which is connected to the sealing member (521), and the other end of which is slidably connected to the inner wall of the cylinder body (510).

4. The impact device (10) according to claim 3, characterized in that The piston module (520) further comprises: An elastic member (523), wherein two ends of the elastic member (523) are respectively connected to the sealing member (521) and the piston member (522).

5. The impact device (10) according to claim 3, characterized in that The piston module (520) further comprises: A buffer member (524) is connected to the piston member (522). The buffer member (524) is disposed in the fourth air inlet chamber (513) and is located between the piston member (522) and the inner wall of the cylinder body (510).

6. The impact device (10) according to any one of claims 1 to 5, characterized in that Also includes: The exhaust component (600) is connected to the cylinder (100). The cylinder (100) is provided with an exhaust port (120). The exhaust component (600) is covered on the exhaust port (120).

7. The impact device (10) according to any one of claims 1 to 5, characterized in that Also includes: The exhaust tank (700) is communicated with the end of the cylinder (100) connected to the impact member (200).

8. The impact device (10) according to any one of claims 1 to 5, characterized in that Also includes: An impact portion (810) connected to an end of the impact member (200); A limiting member (820) is connected to one end of the cylinder (100) connected to the impact member (200); along the radial direction of the cylinder (100), the limiting member (820) extends out of the cylinder (100), and the impact portion (810) extends out of the impact member (200); A buffer pad (830) is connected to the limiting member (820), and the buffer pad (830) is located between the impact portion (810) and the limiting member (820).

9. The impact device (10) according to any one of claims 1 to 5, characterized in that Also includes: A regulating module, the regulating module is used to regulate the preset pressure of the air inlet tank (400).

10. An impact test device, characterized in that: include: The impact device (10) as claimed in any one of claims 1 to 9.

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