Braking device, braking method and impact test equipment

Abstract

The invention relates to the technical field of impact test equipment, in particular to a braking device, a braking method and impact test equipment. The brake device comprises a mounting base, a brake rod, a brake pad and a driving mechanism, the driving mechanism, the brake rod and the brake pad are all arranged in the mounting base, the brake pad is connected with the piston rod and can move relative to the mounting base in the first direction, the driving mechanism, the brake rod and the brake pad are arranged in the second direction, and the driving mechanism can output linear motion in the second direction. And the brake rod is in sliding butt joint with the brake pad. Counter-force is generated in a piston rod braking mode, output force of the air cylinder is directly controlled, and as the mass of the piston rod is far smaller than that of the sliding trolley table top, enough braking force can be provided, the requirement for a braking device is low, and larger indexes can be achieved. According to the impact test equipment provided by the invention, by applying the braking device, enough braking force can be provided, and the index capability of the impact test equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of impact testing, and in particular to a braking device, a braking method and impact testing equipment. Background Art

[0002] The horizontal arbitrary waveform test bench, also known as the acceleration trolley, pushes the slide trolley through the high-pressure cylinder piston to generate a positive thrust on the slide trolley, and then uses the servo brake under the slide trolley to generate a reverse friction force. By changing the friction force, the resultant force acting on the slide trolley is changed to generate arbitrary acceleration. It is widely used in collision tests in the fields of automobiles, rail transportation, aviation, and ships. In the use of the acceleration trolley, the cylinder needs to withstand high-speed and high-pressure air. Simply setting a buffer pad between the piston and the end cover is difficult to prevent the collision between the piston and the end cover, and the cylinder is easily damaged.

[0003] Due to the large mass of the table, a greater force is required to produce the same reverse acceleration, and the requirements for the servo brake are higher, resulting in limitations on the acceleration required for the collision test.

[0004] Therefore, there is an urgent need for a braking device, a braking method and an impact test equipment to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a braking device, a braking method and an impact test device, which can provide sufficient braking force and improve the index capability of the impact test device.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] Braking device, comprising:

[0008] Mounting seat;

[0009] A brake rod, a brake pad and a driving mechanism, wherein the driving mechanism, the brake rod and the brake pad are all arranged in the mounting seat, the brake pad is connected to the piston rod and can move relative to the mounting seat in a first direction, the driving mechanism, the brake rod and the brake pad are arranged in a second direction, and the driving mechanism can output a linear motion along the second direction so that the brake rod and the brake pad are slidably abutted.

[0010] As an optional solution, the driving mechanism includes:

[0011] A body connected to the mounting seat;

[0012] The output end is movably disposed on the body and is capable of pushing the brake rod to move along the second direction.

[0013] As an optional solution, there are multiple output ends, and the multiple output ends are arranged along the first direction.

[0014] As an optional solution, the driving mechanism further includes:

[0015] A control valve is configured to control the opening, closing or output force of the output end.

[0016] As an optional solution, the driving mechanism further includes:

[0017] A thrust plate is arranged on a side of the output end close to the brake rod.

[0018] As an optional solution, there are multiple driving mechanisms, and the multiple driving mechanisms are arranged along the first direction.

[0019] As an optional solution, the braking device further includes:

[0020] A friction plate is arranged on a side of the brake lever close to the brake pad.

[0021] As an optional solution, the brake rod is a hollow structure.

[0022] As an option, the brake pad is made of carbon composite material.

[0023] The braking method, performed using the above-mentioned braking device, comprises the following steps:

[0024] The piston rod drives the brake rod to move along a first direction;

[0025] The output end of the driving mechanism slides along the second direction to abut against the brake rod;

[0026] The brake rod slides along the second direction to abut against the brake pad.

[0027] The impact test equipment includes a driving device, a trolley and the above-mentioned braking device, wherein the trolley carries a test sample, the driving device is used to drive the trolley and the test sample thereon to move, and the braking device is used to generate a braking force on the driving device so that the trolley moves according to a specific acceleration curve.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The braking device provided by the present invention, when braking is needed, the brake rod moves along the first direction driven by the piston rod, and the driving mechanism drives the brake rod in the second direction to slide and abut against the brake pad, so that the brake rod generates a reverse friction force, thereby realizing the braking effect on the piston rod, and generating a reaction force by braking the piston rod, directly controlling the output force of the cylinder. Since the mass of the piston rod is much smaller than the mass of the slide trolley table, it can provide sufficient braking force, so the requirements for the braking device are relatively low, and a larger indicator can be achieved.

[0030] The braking method provided by the present invention is implemented using the above-mentioned braking device, which can provide sufficient braking force and improve the index capability of the impact test equipment.

[0031] The impact test equipment provided by the present invention can provide sufficient braking force and improve the index capability of the impact test equipment by applying the above-mentioned braking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of a driving device and a braking device provided in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a braking device provided in an embodiment of the present invention;

[0035] Figure 3 A first cross-sectional view of a braking device provided by an embodiment of the present invention;

[0036] Figure 4 A second cross-sectional view of the braking device provided in an embodiment of the present invention.

[0037] Reference numerals:

[0038] 100. Braking device;

[0039] 10. Mounting seat; 11. First mounting member; 12. Second mounting member;

[0040] 20. Brake lever; 21. Connecting plate;

[0041] 30. Brake pads;

[0042] 40. driving mechanism; 41. body; 42. output end; 43. thrust plate; 44. control valve;

[0043] 50. Friction plate;

[0044] 200. Driving device; 210. Piston rod. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0046] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0051] The horizontal arbitrary waveform test bench, also known as the acceleration trolley, uses a high-pressure cylinder piston to push the trolley to generate a positive thrust on the trolley, and then uses the servo brake under the trolley to generate a reverse friction force. By changing the friction force, the resultant force acting on the trolley is changed to generate arbitrary acceleration. Due to the large mass of the table, a greater force is required to generate the same reverse acceleration, and the requirements for the servo brake are high, resulting in limitations in the acceleration required for the collision test.

[0052] In order to solve the above problems, Figure 1 As shown, this embodiment provides a braking device 100, which is connected to the piston rod 210 of the driving device 200 to directly brake the piston rod 210, thereby achieving the purpose of controlling the output force of the driving device 200. In this embodiment, the driving device 200 is a cylinder. In other embodiments, the driving device 200 can also be a hydraulic cylinder, etc.

[0053] Specifically, Figure 1-Figure 4As shown, the braking device 100 includes a mounting seat 10, a brake rod 20, a brake pad 30 and a driving mechanism 40. The driving mechanism 40, the brake rod 20 and the brake pad 30 are all arranged in the mounting seat 10. The brake rod 20 is connected to a piston rod 210. The piston rod 210 can output a linear motion along a first direction so that the brake rod 20 can move relative to the mounting seat 10 along the first direction. The driving mechanism 40, the brake rod 20 and the brake pad 30 are arranged along a second direction. The driving mechanism 40 can output a linear motion along the second direction so that the brake rod 20 and the brake pad 30 can slide and abut. When braking is needed, the brake rod 20 moves in the first direction driven by the piston rod 210, and the driving mechanism 40 drives the brake rod 20 in the second direction to slide and abut against the brake pad 30, so that the brake rod 20 generates a reverse friction force, thereby achieving a braking effect on the piston rod 210. The reaction force is generated by braking the piston rod 210 to directly control the output force of the cylinder. Since the mass of the piston rod 210 is much smaller than the mass of the slide trolley table, it can provide sufficient braking force. Therefore, the requirements for the braking device 100 are relatively low, and a larger indicator can be achieved.

[0054] Specifically, the mounting seat 10 includes a first mounting member 11 and a second mounting member 12 arranged along the second direction. The first mounting member 11 and the second mounting member 12 are connected by screws, which facilitates the quick disassembly and assembly of the first mounting member 11 and the second mounting member 12, and also facilitates the installation of the driving mechanism 40, the brake rod 20 and the brake pad 30 in the mounting seat 10.

[0055] like Figure 3 As shown, there are two drive mechanisms 40, which are arranged along the first direction to further increase the braking force that the braking device 100 can provide. In other embodiments, the number of the drive mechanisms 40 can also be three, four or more, which can be adaptively adjusted according to actual needs and the specific size of the mounting seat 10.

[0056] Optionally, the driving mechanism 40 includes a body 41 and an output end 42 , the body 41 is connected to the first mounting member 11 , and the output end 42 is movably disposed on the body 41 and can push the brake lever 20 to move along the second direction.

[0057] Optionally, there are multiple output ends 42 , and the multiple output ends 42 are arranged along the first direction to further increase the braking force that the braking device 100 can provide.

[0058] Optionally, the drive mechanism 40 further includes a control valve 44, which is arranged in a one-to-one correspondence with the output end 42, and the control valve 44 is configured to control the opening, closing or output force of the output end 42, so as to control the opening, closing or output force of each output end 42 according to actual needs, and multiple output ends 42 can be controlled in linkage, thereby accurately controlling the output force of the drive device 200. Among them, the control valve 44 is a servo valve, and the specific structure and working principle of the servo valve are both existing technologies, and will not be described in detail in this embodiment.

[0059] In this embodiment, the driving mechanism 40 is a servo cylinder. In other embodiments, the driving mechanism 40 can also be a cylinder or the like.

[0060] Optionally, the drive mechanism 40 further includes a thrust plate 43, which is disposed on a side of the output end 42 close to the brake rod 20. During the sliding abutment between the output end 42 and the brake rod 20, the thrust plate 43 can prevent the output end 42 from being worn, thereby increasing the service life of the drive device 200.

[0061] Optionally, the braking device 100 also includes a friction plate 50, which is arranged on a side of the brake rod 20 close to the brake pad 30. The friction plate 50 can prevent the brake rod 20 from being worn. When the friction plate 50 and the brake pad 30 are worn, the friction plate 50 and the brake pad 30 are adjusted or replaced to ensure that the braking performance of the braking device 100 will not change due to wear.

[0062] Optionally, the friction plate 50 is made of steel material. Steel has good wear resistance to improve the service life of the brake device 100.

[0063] Optionally, there are multiple brake pads 30, and the multiple brake pads 30 are arranged at intervals along the first direction. By providing multiple brake pads 30, the wear resistance of the brake pad 30 can be improved, so as to increase the service life of the brake pad 30 and further increase the service life of the braking device 100.

[0064] Optionally, the brake pad 30 is made of a carbon composite material, which can withstand greater pressure and has a greater friction coefficient with the brake rod 20, which can greatly reduce the requirements for the driving mechanism 40.

[0065] Optionally, the brake rod 20 is a hollow structure, and while ensuring the structural strength of the brake rod 20 , the mass of the brake rod 20 is reduced as much as possible to improve the sensitivity of the brake.

[0066] Specifically, the brake lever 20 includes four connecting plates 21 , and the four connecting plates 21 are sequentially connected and welded to form a hollow rectangular structure, which facilitates the forming of the brake lever 20 .

[0067] Optionally, the connecting plate 21 is made of high-strength aluminum alloy material to ensure the strength of the brake lever 20 .

[0068] This embodiment also provides an impact test device, which includes a driving device 200, a trolley and the above-mentioned braking device 100. The trolley carries a test sample, the driving device 200 is used to drive the trolley and the test sample thereon to move, and the braking device 100 is used to generate a braking force on the driving device 200, so that the trolley moves according to a specific acceleration curve to achieve testing of the test sample. By applying the above-mentioned braking device 100, the impact test device can provide sufficient braking force and improve the index capability of the impact test device.

[0069] This embodiment also provides a braking method, which is performed using the above-mentioned braking device. The braking method includes the following steps:

[0070] The piston rod 210 drives the brake rod 20 to move along a first direction;

[0071] The output end 42 of the driving mechanism 40 slides along the second direction to abut against the brake rod 20;

[0072] The brake lever 20 slides along the second direction to abut against the brake pad 30 .

[0073] Through the above steps, when braking is needed, the brake rod 20 moves along the first direction driven by the piston rod 210, and the driving mechanism 40 drives the brake rod 20 to slide and abut against the brake pad 30 along the second direction, so that the brake rod 20 generates a reverse friction force, thereby achieving a braking effect on the piston rod 210. The reaction force is generated by braking the piston rod 210 to directly control the output force of the cylinder. Since the mass of the piston rod 210 is much smaller than the mass of the slide trolley table, it can provide sufficient braking force. Therefore, the requirements for the braking device 100 are relatively low, and a larger indicator can be achieved.

[0074] The braking method further comprises the following steps:

[0075] The plurality of control valves 44 control the opening, closing or output force of the corresponding output end 42 as required. Through the above steps, the output force of the driving device 200 can be precisely controlled.

[0076] Note that in the description of this specification, the description with reference to the terms "some embodiments", "other 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.

[0077] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A braking device, characterized in that: include: Mounting seat (10); A brake rod (20), a brake pad (30) and a driving mechanism (40), wherein the driving mechanism (40), the brake rod (20) and the brake pad (30) are all arranged in the mounting seat (10), the brake pad (30) is connected to the piston rod (210) and can move relative to the mounting seat (10) in a first direction, the driving mechanism (40), the brake rod (20) and the brake pad (30) are arranged in a second direction, and the driving mechanism (40) can output a linear motion in the second direction so that the brake rod (20) and the brake pad (30) are in sliding contact with each other.

2. The braking device according to claim 1, characterized in that: The driving mechanism (40) comprises: A body (41), wherein the body (41) is connected to the mounting seat (10); The output end (42) is movably arranged on the body (41) and is capable of pushing the brake rod (20) to move along the second direction.

3. The braking device according to claim 2, characterized in that: There are a plurality of output ends (42), and the plurality of output ends (42) are arranged along the first direction.

4. The braking device according to claim 2, characterized in that: The driving mechanism (40) further comprises: A control valve (44), wherein the control valve (44) is configured to control the opening, closing or output force of the output end (42).

5. The braking device according to claim 2, characterized in that: The driving mechanism (40) further comprises: A thrust plate (43), wherein the thrust plate (43) is arranged on a side of the output end (42) close to the brake rod (20).

6. The braking device according to claim 1, characterized in that: There are multiple drive mechanisms (40), and the multiple drive mechanisms (40) are arranged along the first direction.

7. The braking device according to claim 1, characterized in that: The braking device also includes: A friction plate (50) is arranged on a side of the brake lever (20) close to the brake pad (30).

8. The braking device according to claim 7, characterized in that: The brake rod (20) is a hollow structure.

9. A braking method, characterized in that: The method is completed using a braking device as described in any one of claims 1 to 8, comprising the following steps: The piston rod (210) drives the brake rod (20) to move along a first direction; The output end (42) of the driving mechanism (40) slides along the second direction to abut against the brake rod (20); The brake rod (20) slides along the second direction to abut against the brake pad (30).

10. Impact test equipment, characterized in that, It comprises a driving device (200), a trolley and a braking device as described in any one of claims 1 to 8, wherein the trolley carries a test sample, the driving device (200) is used to drive the trolley and the test sample thereon to move, and the braking device is used to generate a braking force on the driving device (200) so that the trolley moves according to a specific acceleration curve.

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