An impact actuator

Abstract

The utility model belongs to the impact test technical field discloses an impact executor. The air cylinder inside of this impact executor is provided with air cavity, push rod is set up in the air cavity along the axial movement, the impact hammer is set up in the air cavity, and is located in the top of push rod, the inside of gas distribution cylinder stores the compressed gas, the gas distribution cylinder sets up one end of air cylinder and is connected with air cavity, the compressed gas can enter the air cavity and drive push rod to push the impact hammer and accelerate to the preset speed along the axial, the limit structure sets up one end of air cylinder far from the gas distribution cylinder, and the limit structure is used for limiting the impact hammer in the air cylinder port, the speed control mechanism includes clamping assembly and friction piece, and clamping assembly sets up in the outer periphery of air cylinder, and clamping assembly is configured as can drive friction piece gradually and tightly or far from push rod, so that push rod decelerates or accelerates, the detection mechanism is used for detecting the speed of push rod, and the detection mechanism is connected with clamping assembly communication, so as to be able to drive friction piece and tightly or far from push rod according to the detection speed.

Description

Technical Field

[0001] This utility model relates to the field of impact testing technology, and in particular to an impact actuator. Background Technology

[0002] Existing impact testing equipment mainly uses gravity-driven, pneumatic-driven, and hydraulic-driven methods to provide kinetic energy, but these methods also have some drawbacks. The core of gravity-driven methods is to use the free surface to provide impact velocity. While this method facilitates precise control of impact velocity (the acceleration during impact is gravitational acceleration), it cannot achieve higher impact velocities. The core of pneumatic-driven methods is to use compressed gas to provide power. Although it can provide strong thrust to the test target, the high-pressure gas can cause vibration, resulting in poor control accuracy and difficulty in reasonably controlling impact velocity. Hydraulic-driven methods utilize high-pressure liquid to provide power, offering good control accuracy and providing significant thrust, but the hydraulic pump station and other auxiliary equipment are bulky, costly, and difficult to transport.

[0003] Therefore, there is an urgent need for an impact actuator that can solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide an impact actuator that is small in size, low in cost, easy to use, and capable of providing a large impact velocity while controlling and adjusting the impact velocity in real time and with precision.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An impact actuator, comprising:

[0007] A cylinder, with an internal air chamber;

[0008] The push rod is axially movable within the air cavity;

[0009] An impact hammer is movably disposed within the air chamber and located at the top of the push rod;

[0010] The air distribution cylinder contains compressed gas. The air distribution cylinder is located at one end of the cylinder and communicates with the air chamber. The compressed gas can enter the air chamber and drive the push rod to push the impact hammer to accelerate axially to a preset speed.

[0011] A limiting structure is provided at the end of the cylinder away from the air distribution cylinder, and the limiting structure is used to limit the impact hammer to the cylinder port;

[0012] A speed control mechanism includes a clamping assembly and a friction element. The clamping assembly is disposed on the outer periphery of the cylinder and is configured to drive the friction element to gradually press against or move away from the push rod, so as to decelerate or accelerate the push rod.

[0013] A detection mechanism is used to detect the speed of the push rod. The detection mechanism is communicatively connected to the clamping assembly, which can drive the friction element to press against or move away from the push rod according to the detected speed.

[0014] Preferably, the cylinder includes a first cylinder body and a second cylinder body, and an installation gap is provided between the first cylinder body and the second cylinder body, and the speed control mechanism is disposed in the installation gap;

[0015] The clamping assembly includes a main body and a hydraulic component. The hydraulic component is disposed on the main body. Both ends of the main body are coaxially and sealed to the first cylinder and the second cylinder, respectively, to form the air chamber. The main body is located outside the push rod, and the friction element is located between the push rod and the main body. The hydraulic component can generate hydraulic pressure to drive the friction element to gradually press against or move away from the push rod.

[0016] Preferably, the speed control mechanism further includes a control valve configured to adjust the hydraulic pressure of the hydraulic component.

[0017] Preferably, the push rod includes a rod body and a rod head connected to each other, the first cylinder body and the second cylinder body have the same diameter, the rod head is slidably guided with the first cylinder body, and the diameter of the rod body is smaller than the diameter of the rod head.

[0018] Preferably, the cylinder further includes a base, which is coaxially connected to one end of the first cylinder body away from the main body. The base has an axially formed flow channel communicating with the air chamber, and an air inlet channel communicating with the flow channel is formed on the side of the base. The air distribution cylinder is located on the side of the base and communicates with the air inlet channel.

[0019] Preferably, the limiting structure includes a mounting plate, an expansion member, and a limiting ball. The mounting plate is installed on the end of the second cylinder away from the main body. An expansion space is provided inside the mounting plate. An air inlet communicating with the expansion space is provided on one side of the mounting plate. The expansion member and the limiting ball are both disposed in the expansion space. The air blowing hole of the expansion member is connected to the air inlet.

[0020] The impact hammer is provided with a limiting groove on its outer periphery. The width of the limiting groove is smaller than the diameter of the limiting ball. After external gas enters the expansion member, the expansion member can squeeze the limiting ball, and part of the limiting ball can enter the limiting groove to limit the impact hammer to the end of the second cylinder.

[0021] Preferably, the expansion member is an air expansion ring, and multiple limiting balls are provided in the expansion space. The multiple limiting balls are arranged around the outer periphery of the impact hammer. The limiting groove is an annular groove, and multiple limiting grooves are provided at intervals along the axial direction of the impact hammer.

[0022] Preferably, a limiting ring is provided in the expansion space. The limiting ring is arranged around the outer periphery of the impact hammer. Multiple limiting holes are provided on the limiting ring along the circumferential direction. Multiple limiting balls are arranged in the limiting holes. When the expansion member expands and squeezes the multiple limiting balls, the portions of the multiple limiting balls that are away from the expansion member can pass through the limiting holes and be correspondingly engaged in the limiting grooves.

[0023] Preferably, the second cylinder body has a flange at the end opposite to the main body, and the mounting plate is detachably connected to the flange.

[0024] Preferably, the detection mechanism includes a photoelectric sensor, a displacement sensor, and a bracket. The bracket is mounted on the mounting plate, the photoelectric sensor is mounted on the mounting plate, one end of the displacement sensor is mounted on the base, and the other end is inserted into the push rod.

[0025] The beneficial effects of this utility model are:

[0026] This utility model belongs to the field of impact testing technology and discloses an impact actuator. It includes a cylinder, a push rod, an impact hammer, an air distribution cylinder, a limiting structure, a speed control mechanism, and a detection mechanism. The cylinder has an internal air chamber. The push rod is axially movable within the air chamber, and the impact hammer is movably disposed within the air chamber, located at the top of the push rod. The air distribution cylinder stores compressed gas and is located at one end of the cylinder, communicating with the air chamber. The compressed gas can enter the air chamber and drive the push rod to accelerate the impact hammer axially to a preset speed. The limiting structure is located at the end of the cylinder away from the air distribution cylinder, and is used to limit the impact hammer to the cylinder port. The speed control mechanism includes a clamping assembly and a friction element. The clamping assembly is located on the outer periphery of the cylinder and is configured to drive the friction element to gradually press against or move away from the push rod, thereby decelerating or accelerating the push rod. The detection mechanism is used to detect the speed of the push rod and is communicatively connected to the clamping assembly, so that it can drive the friction element to press against or move away from the push rod according to the detected speed. This allows for precise control and adjustment of the impact speed.

[0027] In this device, compressed gas in the gas distribution cylinder drives the push rod to travel at high speed within the air chamber, accelerating the impact hammer to a preset speed. This allows the impact hammer to generate sufficient impact force at the cylinder port. The detection mechanism monitors the push rod's speed in real time (since the impact hammer is located at the top of the push rod, the push rod's speed is also the actual speed of the impact hammer). When this speed reaches the preset speed, the clamping component in the speed control mechanism decelerates the push rod by driving the friction element to press against it. At this point, the impact hammer continues to move under inertia and completes the impact task. During acceleration, if the push rod's speed is too low, the clamping component can drive the friction element away from the push rod, allowing the push rod to push the impact hammer to the preset speed. Furthermore, the limiting structure can limit the impact hammer, preventing it from flying out of the device or impacting the push rod in the opposite direction within the air chamber after a collision. The entire actuator is small in size, low in cost, and easy to operate, providing real-time and precise control and adjustment of the impact speed while offering a relatively high impact velocity.

[0028] The test specimens are installed at intervals on the top of the device, with a distance of no more than 10 mm between them and the top of the device (at this distance, the impact hammer will not completely detach from the cylinder). During the impact operation, the initial position of the impact hammer is at the top of the push rod. After the push rod drives the impact hammer to accelerate to the preset speed, the clamping component of the speed control mechanism gradually clamps the push rod and decelerates the push rod until it stops. At this time, the impact hammer continues to move under the action of inertia. When the impact hammer hits the test specimen, it rebounds. At this time, the limiting structure limits the impact hammer to prevent it from impacting the push rod in the opposite direction. Conversely, if the speed of the impact hammer is too high, causing the test specimen to be broken, the limiting structure can also limit the impact hammer to prevent the impact hammer from detaching from the device. Attached Figure Description

[0029] Figure 1 This is an isometric view of the impact actuator described in an embodiment of the present invention;

[0030] Figure 2 This is a cross-sectional view of the impact actuator described in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the limiting structure of the impact actuator described in this embodiment of the utility model.

[0032] In the picture:

[0033] 10. Cylinder; 11. Air chamber; 12. First cylinder block; 13. Second cylinder block; 14. Base; 141. Flow channel; 142. Intake port; 15. Flange;

[0034] 20. Putter; 21. Shaft; 22. Clubhead; 23. Cushion;

[0035] 30. Gas cylinder;

[0036] 40. Limiting structure; 41. Mounting plate; 411. Expansion space; 412. Inflation port; 42. Expansion component; 43. Limiting ball; 44. Limiting ring;

[0037] 50. Speed ​​control mechanism; 51. Clamping assembly; 511. Main body; 512. Hydraulic components; 52. Friction components; 53. Control valve; 54. Accumulator; 55. Return spring;

[0038] 61. Photoelectric sensor; 62. Displacement sensor; 63. Bracket;

[0039] 70. Impact hammer; 71. Limiting groove. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this utility model, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0045] like Figures 1 to 3 As shown, this utility model provides an impact actuator, which includes a cylinder 10, a push rod 20, an impact hammer 70, an air distribution cylinder 30, a limiting structure 40, a speed control mechanism 50, and a detection mechanism. The cylinder 10 has an internal air chamber 11. The push rod 20 is axially movable within the air chamber 11, and the impact hammer 70 is movably disposed within the air chamber 11, located at the top of the push rod 20. The air distribution cylinder 30 stores compressed gas and is located at one end of the cylinder 10 and communicates with the air chamber 11. The compressed gas can enter the air chamber 11 and drive the push rod 20 to push the impact hammer 70 axially. The cylinder 10 is rapidly moved to a preset speed. A limiting structure 40 is located at the end of the cylinder 10 away from the air distribution cylinder 30. The limiting structure 40 is used to limit the impact hammer 70 to the port of the cylinder 10. The speed control mechanism 50 includes a clamping assembly 51 and a friction element 52. The clamping assembly 51 is located on the outer periphery of the cylinder 10. The clamping assembly 51 is configured to drive the friction element 52 to gradually press against or move away from the push rod 20, so that the push rod 20 decelerates or accelerates. A detection mechanism is used to detect the speed of the push rod 20. The detection mechanism is communicatively connected to the clamping assembly 51. The clamping assembly 51 can drive the friction element 52 to press against or move away from the push rod 20 according to the detected speed.

[0046] In this device, the compressed gas in the air distribution cylinder 30 drives the push rod 20 to travel at high speed within the air chamber 11, and the push rod 20 accelerates the impact hammer 70 to a preset speed, thereby enabling the impact hammer 70 to generate sufficient impact force at the port of the cylinder 10. The detection mechanism can detect the speed of the push rod 20 in real time (since the impact hammer 70 is located at the top of the push rod 20, the speed of the push rod 20 is also the actual speed of the impact hammer 70). When this speed reaches the preset speed, the clamping component 51 in the speed control mechanism 50 can decelerate the push rod 20 by driving the friction element 52 to press against the push rod 20. At this time, the impact hammer 70 can continue to move under the action of inertia and complete the impact task. During the acceleration process, if the speed of the push rod 20 is too low, the clamping component 51 can drive the friction element 52 away from the push rod 20 so that the push rod 20 can push the impact hammer 70 to reach the preset speed. Furthermore, the limiting structure 40 can also limit the impact hammer 70, preventing it from flying out of the device or impacting the push rod 20 in the air chamber 11 after a collision. The entire actuator is small in size, low in cost, and easy to operate, and can provide a large impact velocity while controlling and adjusting the impact velocity in real time and with precision.

[0047] Specifically, the test specimens are installed at intervals at the top of the device, with a distance of no more than 10 mm between them and the top of the device (at this distance, the impact hammer 70 will not completely detach from the cylinder 10). During the impact operation, the initial position of the impact hammer 70 is at the top of the push rod 20. After the push rod 20 drives the impact hammer 70 to accelerate to the preset speed, the clamping component 51 of the speed control mechanism 50 gradually clamps the push rod 20 and decelerates the push rod 20 until it stops. At this time, the impact hammer 70 continues to move under the action of inertia. When the impact hammer 70 hits the test specimen and rebounds, the limiting structure 40 limits the impact hammer 70 to prevent it from impacting the push rod 20 in the opposite direction. Conversely, if the speed of the impact hammer 70 is too high, causing the test specimen to be broken, the limiting structure 40 can also limit the impact hammer 70 to prevent the impact hammer 70 from detaching from the device.

[0048] Specifically, such as Figures 1-2 As shown, the cylinder 10 includes a first cylinder body 12 and a second cylinder body 13. An installation gap is provided between the first cylinder body 12 and the second cylinder body 13, and the speed control mechanism 50 is disposed in the installation gap. The clamping assembly 51 includes a main body 511 and a hydraulic component 512. The hydraulic component 512 is disposed on the main body 511. The two ends of the main body 511 are coaxially and sealed to the first cylinder body 12 and the second cylinder body 13 respectively to form an air chamber 11. The main body 511 is located outside the push rod 20, and the friction component 52 is located between the push rod 20 and the main body 511. The hydraulic component 512 can generate hydraulic pressure to drive the friction component 52 to gradually press against or move away from the push rod 20.

[0049] The separate installation structure of the first cylinder 12 and the second cylinder 13 can greatly improve the convenience of setting the speed control mechanism 50. At the same time, the hydraulic component 512 is set on the main body 511, which also reduces the installation difficulty. The main body 511 is coaxially sealed with the first cylinder 12 and the second cylinder 13, which can ensure good air tightness, ensure smooth impact of the push rod 20, and avoid air leakage or venting. The hydraulic component 512 can automatically drive the friction component 52 to move closer to or away from the push rod 20, thereby improving the convenience of adjusting the impact speed of the push rod 20.

[0050] It should be noted that, as Figures 1-3 As shown, flanges 15 are provided at both ends of the first cylinder 12 and the second cylinder 13 along the axial direction. That is, the first cylinder 12 and the second cylinder 13 are coaxially connected to the main body 511 of the speed control mechanism 50 through flanges 15. The bottom of the first cylinder 12 is connected to the base 14 through flanges 15. The flanges 15 can fully improve the stability and convenience of the connection. At the same time, the bolt connection method is also extremely convenient for disassembly and assembly, which can effectively improve the convenience of subsequent maintenance.

[0051] Furthermore, in this embodiment, the core structure of the hydraulic component 512 is a brake piston. After hydraulic oil enters the tail cavity of the brake piston, it can push the piston to move, thereby driving the friction component 52 to move closer to the push rod 20, thus slowing down the push rod 20 by increasing friction. In addition, the clamping assembly 51 in this embodiment has a return spring 55. When no hydraulic oil is supplied to the brake piston, the return spring 55 can drive the friction component 52 away from the push rod 20, thereby ensuring that the push rod 20 can move smoothly in the air chamber 11 next time.

[0052] like Figure 1 and Figure 2 As shown, the speed control mechanism 50 also includes a control valve 53, which is configured to adjust the hydraulic pressure of the hydraulic component 512. By controlling the hydraulic pressure, the magnitude of the friction force can be adjusted, thereby enabling the push rod 20 to accelerate or decelerate. Furthermore, an accumulator 54 is used in conjunction with it. The accumulator 54 ensures the stability of the hydraulic oil flow, thereby indirectly improving the stability of the speed control mechanism 50 when adjusting the speed. The accumulator 54 is prior art, and its principle for improving the stability of hydraulic oil flow will not be elaborated upon in this paper.

[0053] like Figure 1 and Figure 2As shown, the push rod 20 includes a rod body 21 and a rod head 22 connected to each other. The first cylinder 12 and the second cylinder 13 have the same diameter. The rod head 22 is slidably guided to the first cylinder 12. The diameter of the rod body 21 is smaller than the diameter of the rod head 22. In this structure, the slidably guided engagement between the rod head 22 and the first cylinder 12 ensures the stability of the push rod 20 during the impact process. The smaller diameter of the rod body 21 not only reduces the overall weight but also prevents contact between the rod body 21 and the first cylinder 12 or the second cylinder 13, avoiding excessive friction that could prevent the push rod 20 from reaching its target speed.

[0054] It should be noted that, as Figure 2 As shown, a buffer pad 23 is provided at the end of the rod body 21 away from the rod head 22. The rubber buffer pad 23 can prevent the push rod 20 from having a rigid impact with the limiting structure 40. It can not only transfer energy smoothly, but also avoid structural damage caused by rigid impact, thus improving the service life of the structure.

[0055] Preferably, such as Figure 1 and Figure 2 As shown, the cylinder 10 also includes a base 14, which is coaxially connected to the end of the first cylinder body 12 away from the main body 511. The base 14 has an axially formed flow channel 141 communicating with the air chamber 11, and an air inlet 142 communicating with the flow channel 141 on its side. The air distribution cylinder 30 is disposed on the side of the base 14 and communicates with the air inlet 142. In this structure, the base 14 can significantly improve the stability of the overall structure and avoid vibration during impact. In addition, the air distribution cylinder 30 can be installed on the side of the base 14, which can significantly improve space utilization while ensuring that the gas can pass through the air inlet 142 and the flow channel 141, thereby smoothly reaching the interior of the air chamber 11 and pushing the push rod 20 to move axially from one end of the rod head 22.

[0056] It should be noted that one end of the first cylinder 12 is mounted on the main body 511 via flange 15, and the other end is mounted on the top of the base 14 via flange 15, which ensures that it can be disassembled and cleaned while improving the convenience of installation.

[0057] In addition, such as Figure 2As shown, the detection mechanism includes a photoelectric sensor 61, a displacement sensor 62, and a bracket 63. The bracket 63 is mounted on the mounting plate 41, the photoelectric sensor 61 is mounted on the mounting plate 41, and one end of the displacement sensor 62 is mounted on the base 14, while the other end is inserted into the push rod 20. The photoelectric sensor 61 and the displacement sensor 62 detect the displacement distance of the push rod 20, and then, combined with the movement time, calculate the actual movement speed of the push rod 20. When this movement speed is high, the controller of the detection mechanism can transmit this movement speed to the control valve 53, which in turn adjusts the clamping force of the clamping assembly 51, thereby reducing the actual movement speed of the push rod 20 and achieving closed-loop control.

[0058] Preferably, such as Figure 3 As shown, the limiting structure 40 includes a mounting plate 41, an expansion member 42, and a limiting ball 43. The mounting plate 41 is installed on the end of the second cylinder 13 away from the main body 511. An expansion space 411 is provided inside the mounting plate 41. An air inlet 412 communicating with the expansion space is provided on one side of the mounting plate 41. The expansion member 42 and the limiting ball 43 are both provided in the expansion space 411. The air blowing hole of the expansion member 42 is connected to the air inlet 412. A limiting groove 71 is provided on the outer periphery of the impact hammer 70. The width of the limiting groove 71 is smaller than the diameter of the limiting ball 43. After the external gas enters the expansion member 42, the expansion member 42 can squeeze the limiting ball 43, and part of the limiting ball 43 can enter the limiting groove 71 to limit the impact hammer 70 to the end of the second cylinder 13. When it is necessary to fix the impact hammer 70 to the end of the second cylinder 13, gas can be directly injected into the expansion member 42. At this time, the expansion member 42 can expand rapidly, thereby squeezing the limiting ball 43 within the limited expansion space 411 until part of the limiting ball 43 is pressed into the limiting groove 71 of the impact hammer 70. At this time, part of the limiting ball 43 is located in the limiting space 411, and the other part is located in the limiting groove 71. The limiting ball 43 can counteract and prevent the impact hammer 70 from flying out of the air chamber 11 and the second cylinder 13 after breaking through the test piece, or from falling back into the air chamber 11 and impacting the push rod 20. Not only is the structure simple, but it is also easy to operate. At the same time, the smooth surface of the limiting ball 43 will not scratch or damage the expansion member 42.

[0059] Preferably, such as Figure 3As shown, the expansion member 42 is an air-expanding ring, and multiple limiting balls 43 are arranged within the expansion space 411. These limiting balls 43 are arranged around the outer periphery of the impact hammer 70. The limiting groove 71 is an annular groove, and multiple limiting grooves 71 are spaced apart along the axial direction of the impact hammer 70. When the expansion member 42 is inflated, it forms an annular expansion ring, which can simultaneously compress multiple limiting balls 43 and allow them to engage with the same limiting groove 71. This significantly improves operational efficiency and ensures a good limiting effect, preventing the impact hammer 70 from flying out due to insufficient limiting force. Furthermore, because multiple limiting grooves 71 are spaced apart along the axial direction of the impact hammer 70, it ensures that the impact hammer 70 can engage with the limiting components at multiple locations within the second cylinder 13, further enhancing the user experience and operability.

[0060] Furthermore, such as Figure 3 As shown, a limiting ring 44 is provided within the expansion space 411. The limiting ring 44 is arranged around the outer periphery of the impact hammer 70. Multiple limiting holes are provided along the circumferential direction on the limiting ring 44, and multiple limiting balls 43 are all disposed within the limiting holes. When the expanding member 42 expands and compresses the multiple limiting balls 43, the portions of the multiple limiting balls 43 facing away from the expanding member 42 can pass through the limiting holes and be correspondingly engaged in the limiting grooves 71. This arrangement ensures that the multiple limiting balls 43 are always in the preset positions (each correspondingly accommodated within the limiting holes) and will not roll arbitrarily within the expansion space 411. Thus, the multiple limiting balls 43 can be smoothly engaged in the limiting grooves 71 during the expansion process of the expanding member 42.

[0061] In addition, such as Figure 3 As shown, a flange 15 is provided at the end of the second cylinder 13 opposite to the main body 511, and the mounting plate 41 is detachably connected to the flange 15. The flange 15 improves the ease of assembling the mounting plate 41, and the detachable connection also facilitates subsequent maintenance and replacement of parts, ensuring good performance.

[0062] It should be noted that in this embodiment, the mounting plate 41 and the flange 15 are connected by bolts. Bolts are not only simple in structure and inexpensive, but also only require corresponding threaded holes to be made on the mounting plate 41 and the flange 15, reducing the overall processing difficulty and ensuring ease of use. In addition, the threaded holes of the mounting plate 41 and the flange 15 are made on the side opposite to the inflation port 412, thereby avoiding interference with the inflation port 412 when installing bolts and improving the user experience.

[0063] Referring to the accompanying drawings, the working process of the impact actuator in this embodiment is described as follows:

[0064] First, the air distribution cylinder 30 can introduce compressed gas into the air chamber 11, thereby smoothly driving the push rod 20 to accelerate axially. At the same time, the push rod 20 pushes the impact hammer 70 to accelerate, and the actual movement speed of the push rod 20 is detected by the detection mechanism.

[0065] Secondly, when the speed of this movement is greater than the target value, it means that the impact hammer 70 has reached the preset speed. The controller sends a signal to the control valve 53. The control valve 53 can drive the clamping assembly 51 to drive the friction element 52 to clamp the push rod 20 with a suitable clamping force until it decelerates to a stop. At this time, the impact hammer 70 will continue to move under the action of inertia and impact the test piece.

[0066] Finally, air is injected into the expansion member 42, thereby fixing the impact hammer 70 at the port of the second cylinder 13, preventing the impact hammer 70 from hitting the push rod 20 in the opposite direction or flying out of the cylinder 10 after breaking through the test piece.

[0067] In summary, the impact actuator in this embodiment is small in size, low in cost, and easy to use. Furthermore, it can provide a large impact velocity while controlling and adjusting the impact velocity in real time and with precision.

[0068] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

[0069] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An impact actuator, characterized in that, include: The cylinder (10) has an internal air chamber (11). The push rod (20) is axially movable within the air chamber (11); The impact hammer (70) is movably disposed in the air chamber (11) and located at the top of the push rod (20); The gas distribution cylinder (30) stores compressed gas inside. The gas distribution cylinder (30) is located at one end of the cylinder (10) and communicates with the air chamber (11). The compressed gas can enter the air chamber (11) and drive the push rod (20) to push the impact hammer (70) to accelerate axially to a preset speed. A limiting structure (40) is provided at one end of the cylinder (10) away from the air distribution cylinder (30), and the limiting structure (40) is used to limit the impact hammer (70) to the port of the cylinder (10). The speed control mechanism (50) includes a clamping assembly (51) and a friction element (52). The clamping assembly (51) is disposed on the outer periphery of the cylinder (10). The clamping assembly (51) is configured to drive the friction element (52) to gradually press against or move away from the push rod (20) so that the push rod (20) decelerates or accelerates. The detection mechanism is used to detect the speed of the push rod (20). The detection mechanism is communicatively connected to the clamping assembly (51). The clamping assembly (51) can drive the friction member (52) to press against or move away from the push rod (20) according to the detected speed.

2. The impact actuator according to claim 1, characterized in that, The cylinder (10) includes a first cylinder body (12) and a second cylinder body (13), and an installation gap is provided between the first cylinder body (12) and the second cylinder body (13), and the speed control mechanism (50) is provided in the installation gap; The clamping assembly (51) includes a main body (511) and a hydraulic component (512). The hydraulic component (512) is disposed on the main body (511). The two ends of the main body (511) are coaxially and sealed to the first cylinder (12) and the second cylinder (13) respectively to form the air chamber (11). The main body (511) is located outside the push rod (20), and the friction member (52) is located between the push rod (20) and the main body (511). The hydraulic component (512) can generate hydraulic pressure to drive the friction member (52) to gradually press against or move away from the push rod (20).

3. The impact actuator according to claim 2, characterized in that, The speed control mechanism (50) also includes a control valve (53) configured to adjust the hydraulic pressure of the hydraulic component (512).

4. The impact actuator according to claim 2, characterized in that, The push rod (20) includes a rod body (21) and a rod head (22) connected to each other. The first cylinder (12) and the second cylinder (13) have the same diameter. The rod head (22) is slidably guided to the first cylinder (12). The diameter of the rod body (21) is smaller than the diameter of the rod head (22).

5. The impact actuator according to claim 2, characterized in that, The cylinder (10) also includes a base (14), which is coaxially connected to one end of the first cylinder body (12) away from the main body (511). The base (14) has an axial flow channel (141) communicating with the air chamber (11), and an air intake channel (142) communicating with the flow channel (141) is opened on the side of the base (14). The air distribution cylinder (30) is located on the side of the base (14) and communicates with the air intake channel (142).

6. The impact actuator according to claim 5, characterized in that... The limiting structure (40) includes a mounting plate (41), an expansion member (42), and a limiting ball (43). The mounting plate (41) is installed on one end of the second cylinder (13) away from the main body (511). An expansion space (411) is provided inside the mounting plate (41). An air inlet (412) communicating with the expansion space (411) is provided on one side of the mounting plate (41). The expansion member (42) and the limiting ball (43) are both located in the expansion space (411). The air blowing hole of the expansion member (42) is connected to the air inlet (412). The impact hammer (70) is provided with a limiting groove (71) on its outer periphery. The width of the limiting groove (71) is smaller than the diameter of the limiting ball (43). After the external gas enters the expansion member (42), the expansion member (42) can squeeze the limiting ball (43), and part of the limiting ball (43) can enter the limiting groove (71) to limit the impact hammer (70) to the end of the second cylinder (13).

7. The impact actuator according to claim 6, characterized in that, The expansion member (42) is an air expansion ring, and multiple limiting balls (43) are provided in the expansion space (411). The multiple limiting balls (43) are arranged around the outer periphery of the impact hammer (70). The limiting groove (71) is an annular groove, and multiple limiting grooves (71) are provided at intervals along the axial direction of the impact hammer (70).

8. The impact actuator according to claim 7, characterized in that, A limiting ring (44) is provided in the expansion space (411). The limiting ring (44) is arranged around the outer periphery of the impact hammer (70). Multiple limiting holes are provided on the limiting ring (44) along the circumferential direction. Multiple limiting balls (43) are all arranged in the limiting holes. When the expansion member (42) expands and squeezes the multiple limiting balls (43), the part of the multiple limiting balls (43) away from the expansion member (42) can pass through the limiting holes and be correspondingly engaged in the limiting groove (71).

9. The impact actuator according to claim 6, characterized in that, The second cylinder (13) has a flange (15) at one end away from the main body (511), and the mounting plate (41) is detachably connected to the flange (15).

10. The impact actuator according to claim 6, characterized in that, The detection mechanism includes a photoelectric sensor (61), a displacement sensor (62), and a bracket (63). The bracket (63) is mounted on the mounting plate (41), the photoelectric sensor (61) is mounted on the bracket (63), and one end of the displacement sensor (62) is mounted on the base (14), while the other end is inserted into the push rod (20).

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