Brake device and impact test equipment

Abstract

The utility model relates to the technical field of impact test equipment, in particular to a brake device 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 utility model, the braking device is applied, so that enough braking force can be provided, and the index capability of the impact test equipment is improved.

Description

Technical Field

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

[0002] The horizontal arbitrary waveform test rig, also known as the acceleration trolley, uses a high-pressure cylinder piston to push a trolley, generating forward thrust on the trolley. The servo brake underneath the trolley then generates reverse friction. By varying the friction, the net force acting on the trolley is altered, thereby generating arbitrary acceleration. This test rig is widely used in crash testing in the automotive, rail transit, aviation, and marine sectors. During the use of the acceleration trolley, the cylinder must withstand high-speed, high-pressure air. Simply placing a cushion between the piston and end cap is insufficient to prevent collisions, 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 and an impact testing device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a braking device and an impact test device, which can provide sufficient braking force and improve the index capability of the impact test device.

[0006] To achieve the above objectives, the following technical solutions are provided:

[0007] Braking device, including:

[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 along a second direction, and the driving mechanism can output linear motion along the second direction so that the brake rod and the brake pad are in sliding contact.

[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 lever 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 lever.

[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 lever is a hollow structure.

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

[0023] 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 braking force on the driving device so that the trolley moves according to a specific acceleration curve.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The braking device provided by the utility model has the following characteristics: when braking is needed, the brake rod moves in a first direction driven by the piston rod, and the driving mechanism drives the brake rod in a 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. The reaction force is generated by braking the piston rod, and the output force of the cylinder is directly controlled. Since the mass of the piston rod is much smaller than the mass of the slide table, sufficient braking force can be provided. Therefore, the requirements for the braking device are relatively low, and a larger index can be achieved.

[0026] The impact test equipment provided by the utility model 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

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to 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.

[0028] Figure 1 A schematic diagram of the structure of the driving device and the braking device provided in an embodiment of the utility model;

[0029] Figure 2 A schematic structural diagram of a braking device provided in an embodiment of the present utility model;

[0030] Figure 3 A first cross-sectional view of a braking device provided in an embodiment of the present utility model;

[0031] Figure 4 This is a second cross-sectional view of the braking device provided in an embodiment of the present utility model.

[0032] Reference numerals:

[0033] 100. Braking device;

[0034] 10. Mounting seat; 11. First mounting member; 12. Second mounting member;

[0035] 20. Brake lever; 21. Connecting plate;

[0036] 30. Brake pads;

[0037] 40. Drive mechanism; 41. Main body; 42. Output end; 43. Thrust plate; 44. Control valve;

[0038] 50. Friction plate;

[0039] 200. Driving device; 210. Piston rod. DETAILED DESCRIPTION

[0040] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0041] In the description of this 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 this 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 this application.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0043] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this 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. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0045] 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 an intermediate 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 an intermediate element. 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 embodiment.

[0046] The horizontal arbitrary waveform test bench, also known as the acceleration trolley, uses a high-pressure cylinder piston to push the trolley, generating 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, the force required to generate the same reverse acceleration is greater, and the requirements for the servo brake are higher, resulting in limitations on the acceleration required for collision testing.

[0047] In order to solve the above problems, Figure 1 As shown, this embodiment provides a braking device 100 that is connected to a piston rod 210 of a 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 pneumatic cylinder. In other embodiments, the driving device 200 can also be a hydraulic cylinder, etc.

[0048] Specifically, if Figures 1-4 As 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 the piston rod 210. The piston rod 210 can output 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 linear motion along the second direction so that the brake rod 20 and the brake pad 30 can slide and abut. When braking is required, 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. By braking the piston rod 210, a reaction force is generated 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 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.

[0049] 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 rapid disassembly and assembly of the first mounting member 11 and the second mounting member 12, and at the same time facilitates the installation of the driving mechanism 40, the brake rod 20 and the brake pad 30 in the mounting seat 10.

[0050] like Figure 3 As shown, there are two drive mechanisms 40, which are arranged along the first direction to further increase the braking force provided by the braking device 100. In other embodiments, the number of drive mechanisms 40 can also be three, four, or more, and can be adaptively adjusted according to actual needs and the specific size of the mounting base 10.

[0051] 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.

[0052] 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.

[0053] Optionally, the drive mechanism 40 further includes a control valve 44, which is provided in a one-to-one correspondence with the output end 42. The control valve 44 is configured to control the opening and closing of the output end 42, or the magnitude of the output force. This allows the opening and closing, or the magnitude of the output force, of each output end 42 to be controlled as needed. Multiple output ends 42 can be controlled in a coordinated manner, thereby precisely controlling the output force of the drive device 200. The control valve 44 is a servo valve, and the specific structure and operating principle of the servo valve are known in the art and will not be described in detail in this embodiment.

[0054] In this embodiment, the driving mechanism 40 is a servo oil cylinder. In other embodiments, the driving mechanism 40 can also be a pneumatic cylinder.

[0055] Optionally, the drive mechanism 40 further includes a thrust plate 43, which is arranged on a side of the output end 42 close to the brake rod 20. During the sliding contact between the output end 42 and the brake rod 20, the thrust plate 43 can prevent the output end 42 from wearing, thereby increasing the service life of the drive device 200.

[0056] Optionally, the brake device 100 further includes a friction plate 50 , which is disposed on a side of the brake lever 20 close to the brake pad 30 . By adjusting or replacing the friction plate 50 and the brake pad 30 , the braking performance of the brake device 100 is ensured not to change due to wear.

[0057] Optionally, the friction plate 50 is made of steel. Steel has good wear resistance to improve the service life of the braking device 100.

[0058] Optionally, the brake lever 20 is a hollow structure, which ensures the structural strength of the brake lever 20 while reducing the mass of the brake lever 20 as much as possible to improve the sensitivity of the brake.

[0059] Specifically, the brake lever 20 includes four connecting plates 21 . 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 .

[0060] The connecting plate 21 is made of high-strength aluminum alloy material to ensure the strength of the brake lever 20 .

[0061] 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.

[0062] This embodiment also provides an impact testing device, comprising a driving device 200, a trolley, and the aforementioned 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 test the test sample. By utilizing the aforementioned braking device 100, the impact testing device can provide sufficient braking force, thereby improving the performance of the impact testing device.

[0063] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with those embodiments or examples are included in at least one embodiment or example of the present invention. Throughout this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be incorporated in any suitable manner in any one or more embodiments or examples.

[0064] The above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are readily apparent to those skilled in the art without departing from the scope of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include other equivalent embodiments without departing from the spirit of the present invention. The scope of the present invention is determined by 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 along the second direction so that the brake rod (20) and the brake pad (30) are in sliding contact.

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

3. The braking device according to claim 2, characterized in that There are multiple output ends (42), and the multiple 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) is configured to control the opening and closing of the output end (42) or the magnitude of the output force.

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

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

7. The braking device according to claim 1, characterized in that The braking device further comprises: A friction plate (50) is provided 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. The braking device according to any one of claims 1 to 8, characterized in that: The brake pad (30) is made of carbon composite material.

10. Impact test equipment, characterized in that, The invention comprises a driving device (200), a trolley and a braking device as described in any one of claims 1 to 9, wherein a test sample is carried on the trolley, 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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