Pneumatic linear load simulator

Abstract

The present invention discloses a pneumatic linear load simulator, comprising: a base, on which a guide rail is provided, the guide rail is slidably connected to a slide, one side of the slide is fixedly connected to a vertical loading member, and the other side of the slide is fixedly connected to a cylinder bracket; a vertical cylinder, fixedly connected to the base, and its output shaft is connected to the slide; a horizontal cylinder, fixedly connected to the cylinder bracket, and its output shaft is connected to the horizontal loading member; a force-bearing member, fixedly connected to the object to be measured, and used to counteract the vertical loading member and the horizontal loading member; a horizontal pressure sensor, provided on the horizontal loading member, and used to detect the pressure between the horizontal loading member and the force-bearing member when the two are counteracted; a vertical pressure sensor, provided on the vertical loading member, and used to detect the pressure between the vertical loading member and the force-bearing member when the two are counteracted; a balancing cylinder, fixed to the base, and its output shaft is connected to the slide or the cylinder bracket. The simulator of this solution has the advantages of high loading accuracy, strong capacity, and the ability to work in high and low temperature, vibration, and impact environments.

Description

Technical Field

[0001] The present invention relates to the technical field of load simulators, in particular to a pneumatic linear load simulator. Background Art

[0002] Linear load simulators are widely used in hardware-in-the-loop (HIL) simulations of linear motion objects, simulating the mechanical performance of loaded linear motion objects. Load characteristics are studied to enhance the stability and reliability of system mechanisms during actual operation. By simulating load forces with load simulators, full-scale tests can be converted to HIL tests, improving the reliability and success rate of product development while shortening development cycles and reducing costs.

[0003] Current linear load simulator drive systems primarily utilize electro-hydraulic and electric actuators. Electro-hydraulic actuators offer the advantage of high loading capacity, but suffer from poor loading performance under light load conditions, heavy pollution, and inconvenient maintenance. Electric actuators offer high loading resolution and are suitable for light loads, but require large motors for heavy loads and are unsuitable for use in environments with high or low temperatures, vibration, or shock. Summary of the Invention

[0004] In order to overcome the defects in the prior art, an embodiment of the present invention provides a pneumatic linear load simulator, which is used to solve the above problems.

[0005] The present application discloses a pneumatic linear load simulator, comprising:

[0006] A base, wherein the base is provided with a guide rail perpendicular to the base, a slide is slidably connected to the guide rail, a vertical loading member is fixedly connected to one side of the slide, and a cylinder bracket is fixedly connected to the other side of the slide;

[0007] at least one vertical cylinder fixedly connected to the base, wherein the output shaft of the vertical cylinder is connected to the slide;

[0008] A horizontal cylinder is fixedly connected to the cylinder bracket, and the output shaft of the horizontal cylinder is connected to a horizontal loading member;

[0009] A force-bearing member, fixedly connected to the object to be measured, and used to counteract the vertical loading member and the horizontal loading member;

[0010] at least one horizontal pressure sensor, disposed on the horizontal loading member, for detecting the pressure between the horizontal loading member and the force-bearing member when the horizontal loading member and the force-bearing member are in contact with each other;

[0011] a vertical pressure sensor, provided on the vertical loading member, for detecting the pressure between the vertical loading member and the force-bearing member when the vertical loading member and the force-bearing member are in contact with each other;

[0012] At least one balancing cylinder is fixed on the base, and the output shaft of the balancing cylinder is connected to the slide or the cylinder bracket.

[0013] Specifically, the pneumatic linear load simulator further includes an acceleration sensor arranged on the horizontal loading member.

[0014] Specifically, the force-bearing member includes a first force-bearing portion and two second force-bearing portions symmetrically arranged at both ends of the first force-bearing portion, the first force-bearing portion is used to offset the vertical loading member, and the two second force-bearing portions are used to offset the horizontal loading member.

[0015] Specifically, the output shaft of the horizontal cylinder is arranged between the two second force-bearing parts, and a horizontal pressure sensor is provided at each end of the horizontal loading member. The second force-bearing part is provided with a groove for resisting against the horizontal loading member.

[0016] Specifically, the output shaft of the horizontal cylinder passes through the slide plate to be connected with the horizontal loading member.

[0017] Specifically, the vertical loading member includes a pressure plate and a boss arranged on the side of the pressure plate facing the object to be measured. The pressure plate is used to connect with the slide. The pressure plate is provided with a through hole for the second force-bearing part to penetrate and move in the horizontal direction. The boss is used to resist the first force-bearing part, and the vertical pressure sensor is installed in the boss.

[0018] Specifically, the pneumatic linear load simulator includes two vertical cylinders, which are symmetrically located at both ends of the slide and are respectively connected to the slide.

[0019] Specifically, the pneumatic linear load simulator includes two balancing cylinders, which are symmetrically distributed on both sides of the cylinder bracket and are respectively connected to the cylinder bracket.

[0020] Specifically, a quick exhaust valve is provided between the vertical cylinder and the corresponding solenoid valve.

[0021] The present invention has at least the following beneficial effects: it is driven by a cylinder, has the characteristics of high loading accuracy, strong loading capacity, and no pollution, and can realize reliable simulation testing of linear motion objects under various load conditions in high and low temperature, vibration, and impact environments; the pneumatic linear load simulator of this embodiment adopts a symmetrically arranged structure, which makes the structure simple and compact and the volume miniaturized.

[0022] In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 these drawings without paying any creative work.

[0024] Figure 1 is a schematic structural diagram of a pneumatic linear load simulator in a first viewing angle according to an embodiment of the present invention;

[0025] Figure 2 is a schematic structural diagram of a pneumatic linear load simulator according to an embodiment of the present invention from a second viewing angle;

[0026] Figure 3 1 is a schematic structural diagram of a force-bearing member in an embodiment of the present invention;

[0027] Figure 4 1. It is a positional relationship diagram of the horizontal loading member, the horizontal cylinder, and the force-bearing member in an embodiment of the present invention;

[0028] Figure 5 2 is a schematic structural diagram of a vertical loading member according to an embodiment of the present invention;

[0029] Figure 6 2 is a positional relationship diagram of the vertical loading member and the force-bearing member in an embodiment of the present invention.

[0030] The figure marks of the above drawings are: 1. base; 2. guide rail; 3. slide plate; 41. vertical loader; 411. pressure plate; 4111. through hole; 412. boss; 413. mounting plate; 414. reinforcement plate; 42. horizontal loader; 5. cylinder bracket; 61. vertical cylinder; 62. horizontal cylinder; 63. balancing cylinder; 7. force-bearing member; 71. first force-bearing part; 72. second force-bearing part; 721. groove; 81. horizontal pressure sensor; 82. vertical pressure sensor; 83. acceleration sensor; 100. measured object. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "fixed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature therebetween. Furthermore, a first feature being "above," "below," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0034] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do 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 limiting the scope of protection of this application.

[0035] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0036] Combine Figures 1 to 5 As shown, the pneumatic linear load simulator of this embodiment mainly includes: a base 1, a guide rail 2, a slide 3, a vertical loading member 41, a cylinder bracket 5, at least one vertical cylinder 61, a horizontal cylinder 62, a horizontal loading member 42, a force-bearing member 7, at least one horizontal pressure sensor 81, a vertical sensor and at least one balancing cylinder 63.

[0037] Among them, the base 1 is used to support the other components mentioned above, and the base 1 can also be used to connect to a work platform such as a vibration table. The guide rail 2 is vertically connected to the base 1, the slide 3 is slidably connected to the guide rail 2, the vertical loader 41 is fixedly connected to one side of the slide 3, and the cylinder bracket 5 is fixedly connected to the other side of the slide 3. The cylinder body of the vertical cylinder 61 is fixedly connected to the base 1, and its output shaft is connected to the slide 3. The vertical cylinder 61 is used to drive the slide 3 to move on the guide rail 2 in a direction perpendicular to the base 1, thereby driving the vertical loader 41 and the cylinder bracket 5 to move along the guide rail 2. The horizontal cylinder 62 is fixedly connected to the cylinder bracket 5, and its output shaft is set toward the vertical loader 41. The horizontal loader 42 is connected to the output shaft of the horizontal cylinder 62. The force-bearing member 7 is fixed on the object to be measured 100, and is used to respectively offset the vertical loader 41 and the horizontal loader 42 when the vertical cylinder 61 and the horizontal cylinder 62 are working. The horizontal pressure sensor 81 is set on the horizontal loading member 42. When the horizontal loading member 42 and the force-bearing member 7 are in contact with each other, the horizontal pressure sensor 81 can detect the pressure between the two. The vertical pressure sensor 82 is set on the vertical loading member 41. When the vertical loading member 41 and the force-bearing member 7 are in contact with each other, the vertical pressure sensor 82 can detect the pressure between the two. The balancing cylinder 63 is fixed on the base 1, and its output shaft is connected to the slide 3 or the cylinder bracket 5. When the object 100 to be tested is to be installed on the base 1 or the object 100 to be tested does not need to be loaded, the output shaft of the balancing cylinder 63 extends to push the slide 3 and other parts fixed thereon (for the convenience of description, the slide 3 and other parts fixed thereon are referred to as "moving parts") upward to allow personnel to install the object 100. When the simulator loads the object 100 to be tested and the object 100 to be tested performs movement, the output shaft of the balancing cylinder 63 retracts to apply a pulling force to the moving part. This pulling force is used to balance the inertial force generated by the moving part being quickly lifted up by the force-bearing member 7.

[0038] The vertical cylinder 61 is connected to the air supply system via a first solenoid valve and a first proportional valve; the horizontal cylinder 62 is connected to the air supply system via a second solenoid valve and a second proportional valve; and the balancing cylinder 63 is connected to the air supply system via a third solenoid valve and a third proportional valve. The corresponding proportional valve controls the pressure in the corresponding cylinder, while the corresponding solenoid valve connects the corresponding cylinder to the atmosphere.

[0039] Preferably, if Figure 1 and Figure 2 As shown, the pneumatic linear load simulator of this embodiment includes two vertical cylinders 61 and two balancing cylinders 63. The two vertical cylinders 61 are symmetrically arranged on either side of the slide 3 and are respectively connected to the slide 3. The two balancing cylinders 63 are symmetrically arranged on either side of the cylinder bracket 5 and are respectively connected to the cylinder bracket 5. Overall, the pneumatic linear load simulator of this embodiment has a generally symmetrical layout, which facilitates reducing the simulator's size while meeting the required loading force.

[0040] like Figure 1 As shown, the pneumatic linear load simulator of this embodiment may further include an acceleration sensor 83 disposed on the horizontal loading member 42. When the vertical cylinder 61 and the horizontal cylinder 62 load the load-bearing member 7, the horizontal loading member 42 abuts against the load-bearing member 7. Therefore, the acceleration sensor 83 can detect the acceleration of the load-bearing member 7, that is, the acceleration generated when the object 100 under test moves in the vertical direction under the action of the horizontal loading force and the vertical loading force.

[0041] like Figure 3 As shown, the force-bearing member 7 of this embodiment may include a first force-bearing portion 71 and two second force-bearing portions 72 symmetrically arranged at both ends of the first force-bearing portion 71. The first force-bearing portion 71 is used to counteract the vertical loading member 41 to detect the vertical loading force; the two second force-bearing portions 72 are used to counteract the horizontal loading member 42 to detect the horizontal loading force. Figure 1 、 Figure 3 and Figure 4 As shown, the output shaft of the horizontal cylinder 62 passes through the slide 3 to connect to the horizontal loading member 42. The output shaft of the horizontal cylinder 62 is positioned between the two second force-bearing portions 72. A horizontal pressure sensor 81 is mounted on each end of the horizontal loading member 42. When the horizontal loading member 42 abuts against the two second force-bearing portions 72 of the force-bearing member 7, the two horizontal pressure sensors 81 measure the horizontal loading force. Preferably, each second force-bearing portion 72 is provided with a groove 721 for abutting against the horizontal loading member 42.

[0042] like Figure 5 and Figure 6 As shown, the vertical loading member 41 of this embodiment includes a pressure plate 411. A boss 412 is provided on the side of the pressure plate 411 facing the object to be measured 100. The boss 412 is used to abut against the first force-bearing portion 71 of the force-bearing member 7. The pressure plate 411 is connected to the slide 3 through a mounting plate 413. Specifically, the pressure plate 411 and the mounting plate 413 are generally vertically connected to form an L shape. To improve the connection strength between the two, a reinforcing plate 414 is further provided between the pressure plate 411 and the mounting plate 413. The pressure plate 411 is generally located above the force-bearing member 7. Two waist-shaped through holes 4111 are provided on the pressure plate 411. The through holes 4111 are used to allow the two second force-bearing portions 72 of the force-bearing member 7 to pass through and move in the horizontal direction. The vertical sensor is installed in the boss 412. When the boss 412 abuts against the first force-bearing portion 71, the vertical sensor can detect the vertical loading force.

[0043] Preferably, a quick exhaust valve is further provided between the vertical cylinder 61 of this embodiment and the corresponding solenoid valve. The quick exhaust valve can help the corresponding vertical cylinder 61 to increase the exhaust speed and maintain a constant output when the measured object 100 performs movement.

[0044] The pneumatic linear load simulator of this embodiment is mainly used to detect the performance and acceleration of the object under test 100 under a preset load. Its working process is as follows: before starting work, the vertical cylinder 61 and the horizontal cylinder 62 are connected to the atmosphere through the first solenoid valve and the second solenoid valve respectively, and the third proportional valve is used to control the balance cylinder 63 to be pushed out to balance the gravity of the moving part itself, so as to facilitate the installation and alignment of the object under test 100; according to the working conditions of the object under test 100, the output force of the horizontal cylinder 62 and the vertical cylinder 61 is set, and the corresponding proportional valves are used to control the horizontal cylinder 62 and the vertical cylinder 61 to apply corresponding pressures. The proportional valve outputs the analog quantity of the PLC to realize proportional adjustment of the output pressure, thereby realizing linear adjustment of the output force of the horizontal cylinder 62 and the vertical cylinder 61; through the horizontal pressure sensor The device 81 and the vertical pressure sensor 82 measure whether the output force of the corresponding cylinder meets the requirements. If not, the deviation is calculated and reset. The acceleration sensor 83 is used to detect the acceleration generated by the object under test 100 when it moves under the action of the loading force. The movement speed of the object under test 100 is calculated by integrating the acceleration value once, and the movement position of the object under test 100 is calculated by integrating it twice. When the object under test 100 moves in the vertical direction, the force-bearing member 7 pushes the moving part upward, and the moving part moves with a very large acceleration. At this time, the output shaft of the balancing cylinder 63 retracts to apply a pulling force to the moving part to balance the inertial force generated by the moving part. After the test is completed, the horizontal cylinder 62 and the vertical cylinder 61 are pushed out to release the loading force, and the balancing cylinder 63 is pushed out to balance the gravity of the moving part.

[0045] To sum up, the pneumatic linear load simulator of this embodiment has the following advantages: it is driven by a cylinder, has the characteristics of high loading accuracy and strong loading capacity, and can realize simulation testing of linear motion objects under various load conditions in high and low temperature, vibration, and impact environments (the pressure of the corresponding cylinder is controlled by the corresponding proportional valve to achieve adjustment of different loads, and the constant force of the vertical cylinder under different acceleration conditions is achieved through the quick exhaust valve); the pneumatic linear load simulator of this embodiment adopts a symmetrically arranged structure, which makes the structure simple and compact and the size miniaturized.

[0046] Specific embodiments are used in the present invention to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A pneumatic linear load simulator, characterized in that: include: A base, wherein the base is provided with a guide rail perpendicular to the base, a slide is slidably connected to the guide rail, a vertical loading member is fixedly connected to one side of the slide, and a cylinder bracket is fixedly connected to the other side of the slide; at least one vertical cylinder fixedly connected to the base, wherein the output shaft of the vertical cylinder is connected to the slide; A horizontal cylinder is fixedly connected to the cylinder bracket, and the output shaft of the horizontal cylinder is connected to a horizontal loading member; A force-bearing member, fixedly connected to the object to be measured, and used to counteract the vertical loading member and the horizontal loading member; at least one horizontal pressure sensor, disposed on the horizontal loading member, for detecting the pressure between the horizontal loading member and the force-bearing member when the horizontal loading member and the force-bearing member are in contact with each other; a vertical pressure sensor, provided on the vertical loading member, for detecting the pressure between the vertical loading member and the force-bearing member when the vertical loading member and the force-bearing member are in contact with each other; At least one balancing cylinder is fixed on the base, and the output shaft of the balancing cylinder is connected to the slide or the cylinder bracket; The force-bearing member includes a first force-bearing part and two second force-bearing parts symmetrically arranged at both ends of the first force-bearing part, the first force-bearing part is used to offset the vertical loading part, and the two second force-bearing parts are used to offset the horizontal loading part; the output shaft of the horizontal cylinder is arranged between the two second force-bearing parts, and there is a horizontal pressure sensor at each end of the horizontal loading part, and the second force-bearing part is provided with a groove for offsetting the horizontal loading part; the vertical loading part includes a pressure plate and a boss arranged on the side of the pressure plate facing the object to be measured, the pressure plate is used to be connected to the slide, and the pressure plate is provided with a through hole for the second force-bearing part to penetrate and move in the horizontal direction, the boss is used to offset the first force-bearing part, and the vertical pressure sensor is installed in the boss.

2. The pneumatic linear load simulator according to claim 1, characterized in that: The pneumatic linear load simulator further includes an acceleration sensor arranged on the horizontal loading member.

3. The pneumatic linear load simulator according to claim 1, characterized in that: The output shaft of the horizontal cylinder passes through the slide plate to be connected with the horizontal loading member.

4. The pneumatic linear load simulator according to claim 1, characterized in that: The pneumatic linear load simulator includes two vertical cylinders, which are symmetrically located at two ends of the slide and are respectively connected to the slide.

5. The pneumatic linear load simulator according to claim 1, characterized in that: The pneumatic linear load simulator includes two balancing cylinders, which are symmetrically distributed on both sides of the cylinder bracket and are respectively connected to the cylinder bracket.

6. The pneumatic linear load simulator according to claim 1, characterized in that: A quick exhaust valve is also provided between the vertical cylinder and the corresponding electromagnetic valve.

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