CN217111461U - Damper test equipment - Google Patents

Abstract

The utility model discloses a attenuator test equipment belongs to attenuator capability test technical field. This attenuator test equipment includes the frame, drive assembly, remove the subassembly, determine module and control mechanism, the frame sets up along the first direction, drive assembly locates on the frame along the first direction, it locates on the frame to remove the subassembly, and be connected with drive assembly, and can move under the drive of drive assembly, determine module locates and removes the subassembly, lack the parameter that can acquire the attenuator when the test, control mechanism is connected with drive assembly and determine module electricity respectively, and draw corresponding curve according to the parameter of attenuator, wherein, the tip of attenuator passes through the connecting piece respectively with determine module and connected with the frame. The damper testing equipment is small in size, easy to carry, high in safety and high in testing precision, and liquid leakage cannot occur.

Description

Damper test equipment

Technical Field

The utility model relates to a attenuator capability test technical field especially relates to a attenuator test equipment.

Background

A damper is a device for damping mechanical vibration and dissipating kinetic energy by using damping characteristics, and is widely used in various apparatuses, such as a chassis of a robot. The damping force-speed curve and the damping force-displacement curve are important parameter curves capable of reflecting the performance of the damper, and the control of the curves can provide reference for adjustment of the subsequent robot in speed reduction.

In the prior art, a damping suspension test system is generally adopted to test a damper, and the damping suspension test system consists of a double-beam electro-hydraulic loading test bed, an electro-hydraulic servo actuator, a hydraulic pump station system, an electro-hydraulic loading control system, a computer and the like. The electro-hydraulic loading control system and the electro-hydraulic servo actuator can realize high-precision quick response, provide various excitations such as sine waves and random waves, realize characteristic tests of various dampers and vibration reduction performance tests of a vehicle suspension system, automatically control, automatically acquire data and analyze characteristics in the test process through test control software, and provide perfect test curve, data and report output. But current test system not only has the too big overweight of equipment, the difficult defect of equipment transport to and there is the risk that hydraulic oil revealed, and the security is relatively poor, and control accuracy is lower.

Therefore, how to provide a damper testing device with small volume, easy transportation, good safety and high control precision is a technical problem which needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a attenuator test equipment, this attenuator test equipment volume is less, easily carries, and the security is good, and control accuracy is higher.

To achieve the purpose, the utility model adopts the following technical proposal:

a damper testing apparatus comprising: a frame arranged along a first direction; the driving assembly is arranged on the rack along the first direction; the moving assembly is arranged on the rack, is connected with the driving assembly and can move under the driving of the driving assembly; the detection assembly is arranged on the moving assembly and can acquire parameters of the damper during testing; and the control mechanism is respectively and electrically connected with the driving assembly and the detection assembly and draws a corresponding curve according to the parameters of the damper, wherein the end part of the damper is respectively connected with the detection assembly and the rack through a connecting piece.

Preferably, the moving assembly includes a first bracket and a second bracket, the first bracket is disposed on the frame along a first direction and connected to the output end of the driving assembly, the second bracket is disposed on the first bracket, and the second bracket and the first bracket are configured to have a relatively fixed state and a relatively separated disengaged state, wherein the damper is disposed along the first direction, and one end of the damper is connected to the frame and the other end of the damper is connected to the second bracket.

Preferably, the second bracket is slidably disposed on the first bracket, the first bracket is provided with a first adsorbent, the second bracket is provided with a second adsorbent, and the first bracket and the second bracket are fixedly connected and separated through attraction and separation between the first adsorbent and the second adsorbent.

Preferably, the first adsorbent is an electromagnet, and the second adsorbent is a magnet plate.

Preferably, the magnet plate comprises a transverse plate and a vertical plate which are connected in an L shape, the vertical plate is fixedly connected to the second support, and the transverse plate is opposite to the electromagnet; the first direction is a vertical direction, and the transverse plate is arranged above the electromagnet when the damper is used for carrying out a compression damping force test; the damper is configured to be arranged below the electromagnet when a tensile damping force test is carried out.

Preferably, one of the first support and the second support is provided with a slide rail, and the other is provided with a slide block, and the slide block is connected with the slide rail in a sliding manner.

Preferably, the driving assembly is provided with three photoelectric sensors at intervals in sequence along the first direction, and the three photoelectric sensors are respectively arranged in one-to-one correspondence with the stretching limit position, the base point position and the compression limit position of the damper.

Preferably, the damper testing equipment further comprises a guide rod, a first pressing block and a second pressing block, the first pressing block and the second pressing block are arranged on the guide rod in a sleeved mode at intervals, and the second support penetrates through the guide rod in a sliding mode and is located between the first pressing block and the second pressing block.

Preferably, the detection assembly comprises a pressure sensor, and the pressure sensor is arranged at a fixed end of the damper and is used for acquiring the damping force of the damper in the damping force test process;

the detection assembly further comprises a laser range finder, wherein the laser range finder is arranged at the movable end of the damper and used for acquiring the displacement of the damper in the damping force test process.

Preferably, the driving assembly comprises a driving motor, a screw rod, a nut block and an output plate, a motor shell of the driving motor is fixed on the rack, a motor shaft of the driving motor is arranged along the first direction, the screw rod is in transmission connection with the motor shaft, the nut block is in threaded connection with the screw rod and forms a screw-nut pair, and the output plate is connected between the nut block and the first support.

The utility model has the advantages that:

the utility model provides a attenuator test equipment, this attenuator test equipment includes the frame, drive assembly, remove the subassembly, determine module and control mechanism, the frame sets up along the first direction, drive assembly locates in the frame along the first direction, remove the subassembly and locate in the frame, and be connected with drive assembly, and can move under the drive of drive assembly, determine module locates and removes the subassembly, can acquire the parameter of attenuator when the test, control mechanism is connected with drive assembly and determine module electricity respectively, and draw corresponding curve according to the parameter of attenuator, wherein, the tip of attenuator passes through the connecting piece and is connected with determine module and frame respectively. This attenuator test equipment is whole volume not only less, easily transport, and owing to do not adopt the hydraulic pump, consequently can not take place the weeping, and the security is higher to can acquire the parameter of attenuator through the detection subassembly that sets up on moving the subassembly, be favorable to improving the measuring accuracy.

Drawings

Fig. 1 is a schematic overall structure diagram of a damper testing apparatus provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a damper testing apparatus according to an embodiment of the present invention, in which a side wall plate is hidden in a housing;

fig. 3 is a schematic structural diagram of the damper testing apparatus for testing the compressive damping force according to the present invention at an angle after the damper testing apparatus is hidden in the housing;

fig. 4 is a schematic structural diagram of the damper testing device for performing the compression damping force test at another angle after the damper testing device is hidden in the housing;

fig. 5 is a schematic structural diagram of the damper testing apparatus for testing the tensile damping force according to the present invention after the housing is hidden.

In the figure:

1. a drive assembly; 101. a drive motor; 102. an output plate;

2. a first bracket; 3. a second bracket;

4. a first adsorbent; 401. electrifying an electromagnet; 402. a lower electromagnet;

5. a second adsorbent; 501. an upper magnet plate; 502. a lower magnet plate;

6. a guide bar; 7. a first pressing block; 8. a second pressing block; 9. a slide rail; 10. a slider; 11. a pressure sensor; 12. a laser range finder; 13. a lower fixing frame; 14. an upper fixing frame; 15. a frame;

16. a housing; 1601. acrylic plates; 1602. ground feet;

17. a photosensor;

100. a damper.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides a damper test apparatus, which is capable of testing the performance of the damper 100, obtaining the relationship between the damping force and some motion parameters through the test, and obtaining the damping force-motion parameter curve.

As shown in fig. 1 to 5, the damper test apparatus includes a housing 16, a frame 15, a driving assembly 1, a first support 2, a second support 3, a detecting assembly, and a control mechanism. The whole body of the shell 16 is of a cubic structure, the shell is formed by splicing a plurality of plates and a plurality of rod pieces, the rod pieces are spliced to form a cubic frame structure, the plate pieces cover a rectangular frame formed by the rod pieces, and the driving assembly 1, the first support 2, the second support 3, the detection assembly and the control mechanism are all located inside the shell 16. The housing 16 serves as a protection function, and can prevent the main structure of the damper testing device from being damaged and prevent foreign matters from entering. Optionally, the plate members are acrylic plates 1601 and the rod members are alloy rods or stainless steel rods. The bottom of the housing 16 is also provided with four feet 1602 to adjust the balance of the overall apparatus.

The frame 15 is a mounting part of the entire apparatus, which is connected inside the housing 16, and the drive assembly 1 and the damper 100 to be tested can be mounted on the frame 15. Optionally, the frame 15 is a plate-shaped structure in an L shape, and includes a horizontally disposed bottom plate and a vertically disposed back plate, the driving assembly 1 is fixed on the back plate along a first direction, in this embodiment, the first direction is a vertical direction, and the output end of the driving assembly 1 can move up and down along the vertical direction. Of course, in other embodiments, the first direction may not be limited to the vertical direction, and may be, for example, a horizontal direction or an inclined direction, and the structure and the orientation of the rack 15 may be adjusted according to the requirement.

The driving assembly 1 is a power component of the whole damper testing device, and is mainly used for driving the damper 100, the damper 100 to be tested is the prior art, the structure of the damper is not described here, and only one movable end of the damper 100 is defined as a movable end, and the other end fixedly arranged is defined as a fixed end. In the present embodiment, the damper 100 is disposed along the first direction, that is, the damper 100 is also disposed along the vertical direction, and the damper 100 is disposed at one side, for example, the front side, of the driving assembly 1, the fixed end of the damper 100 is fixedly connected to the bottom plate of the frame 15, and the movable end of the damper 100 is connected to the driving assembly 1 through the second bracket 3 and the first bracket 2. Optionally, a U-shaped lower fixing frame 13 and lower fixing rods penetrating through two side plates of the lower fixing frame 13 are disposed on the bottom plate of the frame 15, and fixing ends of the dampers 100 penetrate through the lower fixing rods, so as to be fixedly connected with the bottom plate.

Optionally, the driving assembly 1 is an electric module, specifically an electric module capable of performing linear motion along a first direction, the electric module specifically includes a driving motor 101, a lead screw (not shown in the figure), a nut block (not shown in the figure) and an output plate 102, a motor shaft of the driving motor 101 is vertically disposed and connected with one end of the lead screw through a coupler, and the nut block is in threaded connection with the lead screw and constitutes a lead screw-nut pair. That is, when the driving motor 101 drives the lead screw to rotate, the nut block can move up or down in the vertical direction under the driving of the lead screw, and the output plate 102 is connected to the nut block and is used for being connected with the first bracket 2 to realize the synchronous movement of the first bracket 2 and the nut block. In addition, the driving assembly 1 may further include a housing, the driving motor 101, the lead screw and the nut block are all disposed inside the housing, two sides of the housing are provided with a through elongated hole, and an end of the output plate 102 may pass through the elongated hole and be disposed outside the housing. Optionally, the output board 102 includes a first board, a second board and a third board connected in a U shape, the second board is connected to the nut block, and the first board and the third board are disposed outside the housing and connected to two ends of the first bracket 2, respectively.

Of course, besides the electric module, other electric mechanisms capable of achieving linear motion are also applicable to the present embodiment, such as a linear motor, and are not listed here, that is, as long as the mechanism capable of achieving linear motion of the output end after being powered on can be used as the driving assembly 1 in the present embodiment, and all of them are within the protection scope of the present embodiment. In other embodiments, the driving assembly is not limited to electric driving, and may also be driven by hydraulic, pneumatic, electromagnetic or other driving methods, and may be appropriately selected according to actual needs and application scenarios.

The first bracket 2 is disposed on the frame 15 along the first direction, and the first bracket 2 is fixedly connected to the output end of the driving assembly 1, that is, the first bracket 2 is fixedly connected to the first plate and the third plate of the output plate 102. Optionally, in this embodiment, the first bracket 2 is a vertical plate extending in a vertical direction, and two sides of the vertical plate in a length direction are fixedly connected with the first plate and the third plate respectively through a plurality of screws. Of course, in other embodiments, the first bracket 2 is not limited to a plate-like structure, and may be configured as a frame structure such as a U-shaped frame according to requirements.

The second bracket 3 is disposed at a side of the first bracket 2 away from the driving assembly 1, the second bracket 3 is used for connecting with a movable end of the damper 100, and the second bracket 3 and the first bracket 2 have a fixed state fixed to each other and a disengaged state relatively separated. When the first bracket 2 and the second bracket 3 are in a fixed state, the two brackets form a whole, the output plate 102 of the driving assembly 1 can drive the movable end of the damper 100 to move relative to the fixed end through the first bracket 2 and the second bracket 3, the damping force and related motion parameters of the damper 100 can be correspondingly changed in the movement process, and the change rule can provide reference for the subsequent application of the damper 100 to specific equipment (such as a robot chassis), so that the damping force test can be performed on the damper 100 in the movement process of the output plate 102 of the driving assembly 1 driving the movable end of the damper 100 relative to the fixed end through the first bracket 2 and the second bracket 3. When the movable end of the damper 100 to be measured moves to the extreme position, the first bracket 2 and the second bracket 3 are switched from the fixed state to the disengaged state, and the output end of the driving assembly 1 in the moving state and the first bracket 2 can gradually decrease to zero speed. It should be noted that when the first support 2 and the second support 3 are switched from the fixed state to the disengaged state, the output of the driving assembly 1 and the first support 2 still have a certain speed, and the movement cannot be stopped immediately, and since the output of the driving assembly 1 and the first support 2 are no longer limited by the second support 3 and the damper 100, the speed can be reduced independently of the second support 3 and the damper 100 until the speed is reduced to zero.

It should be noted that the damper 100 has two different usage scenarios of compression and tension during a specific usage process, and therefore the extreme positions to which the movable end of the damper 100 moves include a compression extreme position and a tension extreme position, the compression extreme position is located below the tension extreme position, and a base point position is further provided between the compression extreme position and the tension extreme position, the base point position is the position where the movable end of the damper 100 is located when the damping force test is started. In order to facilitate the determination of the base point position, the compression limit position and the tension limit position, with continued reference to fig. 4, three photoelectric sensors 17 are provided on the housing of the driving assembly 1, the three photoelectric sensors 17 being spaced apart in the vertical direction from top to bottom in sequence and corresponding to the tension limit position, the base point position and the compression limit position, respectively.

Correspondingly, the damping force test includes a compression damping force test and a tension damping force test. When the compression damping force test is performed, the movable end of the damper 100 moves from the base point position to the compression limit position in the forward direction of the first direction (i.e., the vertically downward direction); when the tensile damping force test is performed, the movable end of the damper 100 moves in the first direction upward (i.e., vertically upward direction) from the base point position to the tensile limit position.

Optionally, the second support 3 is slidably disposed on the first support 2, the first support 2 is provided with a first adsorbent 4, the second support 3 is provided with a second adsorbent 5, and the first support 2 and the second support 3 are fixedly connected and separated through the attraction and separation between the first adsorbent 4 and the second adsorbent 5. In the present embodiment, the first absorber 4 is an electromagnet, and is specifically disposed on a vertical surface of the first bracket 2 close to the second bracket 3, and the second absorber 5 is a magnet plate. Of course, in other embodiments, the first adsorbent 4 may be a magnet plate and the second adsorbent 5 may be an electromagnet. When the electromagnet is electrified, the electromagnet can adsorb the magnet plate, and at the moment, the first bracket 2 and the second bracket 3 are relatively fixed and are in a fixed state. And after the electromagnet is powered off, the electromagnet does not adsorb the magnet plate any more, at the moment, the first support 2 and the second support 3 are in a separation state, and relative motion can be generated between the two supports.

Further, in order to improve the adsorption stability of electro-magnet and magnet board, in this embodiment, set up the magnet board into the L type, the magnet board is including being diaphragm and the riser that the L type is connected promptly, riser fixed connection on the vertical face of second support 3, the diaphragm level sets up to just to setting up with the electro-magnet. So can improve the adsorption area of electro-magnet and magnet board to improve adsorption stability.

It should be noted that, because the transverse plate is horizontally disposed, the transverse plate limits the moving direction of the electromagnet and the first bracket 2, so that even when the first bracket 2 and the second bracket 3 are in a separated state, the first bracket 2 can only move in a direction away from the transverse plate relative to the second bracket 3. Therefore, in the present embodiment, when the compression damping force test is performed, since the output end of the driving assembly 1 and the first bracket 2 move vertically downward, when the first bracket 2 and the second bracket 3 are switched to the disengaged state, the first bracket 2 still has a tendency of moving vertically downward, and at this time, the magnet plate needs to be disposed on the top of the second bracket 3, and the horizontal plate of the magnet plate abuts on the upper side of the electromagnet; and when carrying out tensile damping force test, because the output of drive assembly 1 and first support 2 are vertical upward movement, so when first support 2 and second support 3 switch to the detached state, first support 2 still has the trend of vertical upward movement, need set up the magnet board in the bottom of second support 3 this moment, the diaphragm butt of magnet board is in the below of electro-magnet.

Further, in order to avoid detaching the electromagnets for multiple times, two electromagnets which are arranged at intervals can be arranged on the first support 2 along the vertical direction, the two electromagnets are an upper electromagnet 401 and a lower electromagnet 402 respectively, the upper electromagnet 401 and the lower electromagnet 402 are both positioned between the first support 2 and the second support 3, the upper electromagnet 401 and the upper half portion of the second support 3 are arranged in a right-to-top manner, and the lower electromagnet 402 and the lower half portion of the second support 3 are arranged in a right-to-top manner; correspondingly, two L-shaped magnet plates, an upper magnet plate 501 and a lower magnet plate 502, are provided. When the compression damping force test is performed, as shown in fig. 3, only the upper magnet plate 501 located above is mounted, and the upper magnet 401 located above is energized so that the upper magnet plate 501 and the upper magnet 401 are attracted; when the tensile damping force test is performed, as shown in fig. 5, only the lower magnet plate 502 located below is mounted, and the lower electromagnet 402 located below is energized so that the lower magnet plate 502 and the lower electromagnet 402 are attracted.

Further, in order to improve the accuracy of the relative movement between the second bracket 3 and the first bracket 2, a slide rail 9 extending in the vertical direction is provided on the first bracket 2, and a slider 10 is provided on the second bracket 3, the slider 10 being slidably connected to the slide rail 9. Optionally, the number of the slide rails 9 is two, the two slide rails 9 are disposed at the left and right ends of the first bracket 2 at intervals, correspondingly, the number of the sliders 10 is also two, and the two sliders 10 are disposed at the left and right ends of the second bracket 3 at intervals and are respectively connected with the two slide rails 9 in a one-to-one sliding manner. Of course, in other embodiments, the positions of the slide rail 9 and the slider 10 may be interchanged, i.e. the slide rail 9 is arranged on the second bracket 3 and the slider 10 is arranged on the first bracket 2.

As shown in fig. 2 to 5, the damper testing apparatus further includes a guide bar 6, a first pressing piece 7, and a second pressing piece 8. Wherein, the guide bar 6 extends along the vertical direction, and the bottom end of the guide bar 6 is connected with the movable end of the damper 100 through the upper fixing frame 14 and the upper fixing rod. Optionally, the upper fixing frame 14 is an inverted U-shaped frame, the upper fixing rod is inserted through two side plates of the upper fixing frame 14, and the movable sleeve of the damper 100 is sleeved on the upper fixing frame 14. First briquetting 7 and second briquetting 8 interval cover are established on guide bar 6, and the middle part of second support 3 is provided with the hole of wearing to establish, and guide bar 6 passes this hole of wearing to establish setting, and second support 3 is located between first briquetting 7 and second briquetting 8.

The guide rod 6 can provide a guiding function for the movement of the second bracket 3, when the second bracket 3 moves between the first pressing block 7 and the second pressing block 8 along the guide rod 6, the movable end of the damper 100 does not move, when the second bracket 3 moves to contact with the second pressing block 8 below (at this time, the second bracket 3 is accelerated to a preset speed), the damper 100 starts to be compressed, the movable end of the damper 100 starts to move towards the direction close to the fixed end of the damper, and at this time, the movable end of the damper 100 can be used as a starting point for the starting of the formation of a damping force-motion parameter curve; when the second support 3 moves to contact with the first pressing block 7 located above (at this time, the second support 3 has accelerated to a preset speed), the damper 100 starts to be stretched, and the movable end of the damper 100 starts to move away from the fixed end thereof, which can also be used as a starting point for the beginning of the damping force-motion parameter curve. Optionally, the first pressing block 7 and the second pressing block 8 are both polyurethane pressing blocks, and can play a role in shock absorption and buffering.

The detection assembly is used for acquiring the damping force and the motion parameters of the damper 100 when the damping force test is carried out. Optionally, the motion parameters include velocity and displacement, and correspondingly, the damping force-motion parameter curves include a damping force-velocity curve and a damping force-displacement curve. In order to obtain a specific value of the damping force of the damper 100, the detection assembly includes a pressure sensor 11, and the pressure sensor 11 is disposed at a fixed end of the damper 100 for obtaining the damping force of the damper 100 during the damping force test. In this embodiment, the pressure sensor 11 includes an upper pressure sensor and a lower pressure sensor, a threaded rod is protruded from the lower surface of the lower fixing frame 13 of the fixed damper 100, the threaded rod is fixed by a nut after passing through the bottom plate, the upper pressure sensor is sleeved on the threaded rod and is located between the lower surface of the lower fixing frame 13 and the top surface of the bottom plate, and the lower pressure sensor is also sleeved on the threaded rod and is located between the bottom surface of the bottom plate and the nut.

In order to obtain the displacement change of the movable end of the damper 100, the detection assembly further comprises a laser range finder 12, and the laser range finder 12 is arranged at the movable end of the damper 100 and is used for obtaining the displacement of the damper 100 in the damping force test process. Optionally, the laser rangefinder 12 is provided on a side panel of the upper mount 14.

As for the velocity of the movable end of the damper 100, it can be obtained by obtaining the velocity of the output end of the driving assembly 1 and performing a certain calculation. The calculation method is the prior art and is not described herein.

The control mechanism is in communication connection with the detection assembly and can obtain the speed according to the damping force, the displacement and the calculation detected by the detection assembly to form a damping force-speed curve and a damping force-displacement curve. In this embodiment, the control mechanism may be a centralized or distributed controller, for example, the controller may be a single-chip microcomputer or may be formed by a plurality of distributed single-chip microcomputers, and the single-chip microcomputers may run control programs to control the respective components to implement their functions. In this embodiment, the control means is an existing PLC capable of acquiring parameters such as pressure and speed by analog quantity.

The damping force-velocity curve reflects the law of the damping force as the velocity of the damper 100 changes. The damping force-displacement curve reflects the resistance change performance of the damper 100 in compression and extension strokes, the maximum damping force of extension and compression can be obtained from the ordinate, the area of a closed line represents the work done by one full stroke, and different closed lines represent the test results of the damper 100 with different frequencies.

The process of the damper testing equipment for testing the compression damping force is as follows:

first, the movable end of the damper 100 is reset to the base point position, and the entire damper 100 is stretched to a certain extent, and the upper magnet 401 is electrified to attract the upper magnet plate 501, so that the first support 2 and the second support 3 are in a relatively fixed state.

Then, the driving assembly 1 is powered on, and drives the first support 2 and the second support 3 to vertically move downwards along the guide rod 6, so that the speed of the output end of the driving assembly 1 is accelerated to a predetermined speed, the predetermined speed is set according to requirements, for example, the predetermined speed can be 0.1m/s, the speeds of the first support 2 and the second support 3 are the same as the speed of the output end of the driving assembly 1, and after the second support 3 moves for a period of time according to the predetermined speed, the second support 3 is abutted to the second pressing block 8. The moment when the second support 3 and the second pressing block 8 are abutted is taken as a starting point, compression damping force testing is started, the pressure sensor 11 starts to acquire a specific value of the damping force, the laser range finder 12 starts to acquire a specific value of displacement, and the control mechanism forms a damping force-speed curve and a damping force-displacement curve according to the acquired parameter values.

Finally, after the second support 3 drives the second pressing block 8 to enable the movable end of the damper 100 to move to the compression pole position, the upper electromagnet 401 is de-energized and stops adsorbing the upper magnet plate 501, the second support 3 and the first support 2 are switched to the separation state from the fixed state, and at the moment, because the output end of the driving assembly 1 and the first support 2 still have a certain vertical downward movement speed, when the second support 3 and the first support 2 are separated, the first support 2 can slide downward relative to the second support 3, so that the output end of the driving assembly 1 and the first support 2 gradually slow down until the slow down speed is zero.

The process of the damper testing equipment for testing the tensile damping force is as follows:

first, the movable end of the damper 100 is reset to the base point position, and at this time, the entire damper 100 is stretched to a certain extent, and the lower electromagnet 402 is energized, thereby attracting the lower magnet plate 502, and causing the first bracket 2 and the second bracket 3 to be in a relatively fixed state.

Then, the driving assembly 1 is powered on, and drives the first support 2 and the second support 3 to move vertically upwards along the guide rod 6, so that the speed of the output end of the driving assembly 1 is accelerated to a predetermined speed, the predetermined speed is set according to requirements, for example, the predetermined speed can be 0.1m/s, the speeds of the first support 2 and the second support 3 are the same as the speed of the output end of the driving assembly 1, and after the second support 3 moves for a period of time according to the predetermined speed, the second support 3 abuts against the first pressing block 7. The moment when the second support 3 and the first pressing block 7 are abutted is taken as a starting point, the tensile damping force test is started, the pressure sensor 11 starts to acquire a specific value of the damping force, the laser range finder 12 starts to acquire a specific value of the displacement, and the control mechanism forms a damping force-speed curve and a damping force-displacement curve according to the acquired parameter values.

Finally, after the second support 3 drives the first pressing block 7 to enable the movable end of the damper 100 to move to the stretching extreme position, the lower electromagnet 402 is powered off, the lower magnet plate 502 stops being adsorbed, the second support 3 and the first support 2 are switched to the separation state from the fixed state, at the moment, the output end of the driving assembly 1 and the first support 2 still have certain vertical upward movement speed, therefore, after the second support 3 and the first support 2 are separated, the first support 2 can slide upwards relative to the second support 3, and the output end of the driving assembly 1 and the first support 2 are gradually decelerated until the deceleration is zero.

Compared with the existing damper performance testing equipment, the damper testing equipment provided by the embodiment has the following advantages: 1. the problems of heaviness, oil leakage and the like of a hydraulic system are solved by adopting an electric mode. 2. The PLC control is adopted to realize high-speed and high-efficiency control. 3. The problem of the food delivery robot chassis small stroke attenuator characteristic curve not good measurement is solved. 4. The testing requirement of the small damper can be met, and the speed peak value can be configured according to the product performance, for example, the maximum speed of the robot is set to be 1m/s due to the specific scene requirement; the peak velocity of the test apparatus was therefore set to 1 m/s. 5. The performance curve graph of the damper can be measured, and the output of the robot can be adjusted by a future control program according to the performance curve data.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A damper testing apparatus, comprising:

a frame arranged along a first direction;

the driving assembly is arranged on the rack along the first direction;

the moving assembly is arranged on the rack, is connected with the driving assembly and can move under the driving of the driving assembly;

the detection assembly is arranged on the moving assembly and can acquire parameters of the damper during testing;

a control mechanism which is respectively electrically connected with the driving component and the detection component and draws a corresponding curve according to the parameters of the damper,

the end part of the damper is respectively connected with the detection assembly and the rack through connecting pieces.

2. The damper testing apparatus of claim 1, wherein the moving assembly includes a first bracket and a second bracket, the first bracket being disposed on the frame in a first direction and coupled to the output of the driving assembly, the second bracket being disposed on the first bracket, the second bracket and the first bracket being configured to have a relatively fixed, secured state and to have a relatively separated, disengaged state, wherein,

the damper is arranged along the first direction, one end of the damper is connected with the rack, and the other end of the damper is connected with the second support.

3. The damper testing apparatus according to claim 2, wherein the second support is slidably disposed on the first support, and a first absorbent is disposed on the first support, and a second absorbent is disposed on the second support, and the first support and the second support are fixedly connected and separated by means of engagement and disengagement between the first absorbent and the second absorbent.

4. The damper test apparatus of claim 3, wherein the first adsorbent is an electromagnet and the second adsorbent is a magnet plate.

5. The damper testing device of claim 4, wherein the magnet plate comprises a transverse plate and a vertical plate which are connected in an L shape, the vertical plate is fixedly connected to the second support, and the transverse plate is opposite to the electromagnet;

the first direction is a vertical direction, and the transverse plate is arranged above the electromagnet when the damper is used for carrying out a compression damping force test; the damper is configured to be arranged below the electromagnet when a tensile damping force test is carried out.

6. The damper testing apparatus of claim 3, wherein one of the first and second brackets is provided with a slide rail, and the other is provided with a slider, the slider being slidably connected to the slide rail.

7. The damper testing apparatus according to claim 2, wherein three photoelectric sensors are sequentially provided at intervals in the first direction on the housing of the driving assembly, and the three photoelectric sensors are provided in one-to-one correspondence with the tensile limit position, the base point position, and the compression limit position of the damper, respectively.

8. The damper test equipment of claim 2, further comprising a guide rod, a first press block and a second press block, wherein the first press block and the second press block are sleeved on the guide rod at intervals, and the second support is slidably arranged on the guide rod in a penetrating manner and is positioned between the first press block and the second press block.

9. The damper test apparatus according to claim 2, wherein the detection assembly includes a pressure sensor disposed at a fixed end of the damper for acquiring the damping force of the damper during the damping force test;

the detection assembly further comprises a laser range finder, wherein the laser range finder is arranged at the movable end of the damper and used for acquiring the displacement of the damper in the damping force test process.

10. The damper testing device according to any one of claims 2 to 9, wherein the driving assembly includes a driving motor, a lead screw, a nut block, and an output plate, a motor housing of the driving motor is fixed on the frame, a motor shaft of the driving motor is disposed along the first direction, the lead screw is in transmission connection with the motor shaft, the nut block is in threaded connection with the lead screw and constitutes a lead screw nut pair, and the output plate is connected between the nut block and the first bracket.

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