CN112816351A

CN112816351A - Tangential acceleration elastic collision simulation device

Info

Publication number: CN112816351A
Application number: CN202110099034.0A
Authority: CN
Inventors: 修霞; 陈昌金; 常德功; 庄新颖; 李花; 胡海; 孙常庆
Original assignee: Qingdao Hengxing University of Science and Technology
Current assignee: Qingdao Hengxing University of Science and Technology
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-05-18

Abstract

The invention relates to a tangential acceleration elastic collision simulation device, comprising: a main frame, a power device, a collision device, a speed regulating device, and a testing device; the main frame is fixed on the ground foundation and is welded by high-quality structural steel pipes. The power device is installed on the top surface of the main frame, the middle of the power device supports the swing shaft I of the collision device, the speed regulating device accelerates the tires of the collision device, the The test device is fixed on the ground foundation and is located directly under the main frame. When the tire impacts the sample, the test device collects the impact load; the present invention adopts the mechanical control method to realize the acquisition of the instantaneous impact load, and the speed regulating device passes the The stepless speed adjustment realizes the real-time acceleration of tires of different heights, and realizes the real simulation in the laboratory environment.

Description

Tangential acceleration elastic collision simulation device

Technical Field

The invention relates to the field of impact collision simulation devices, in particular to a tangential acceleration elastic collision simulation device.

Background

Most of the existing impact testing machines have single degree of freedom and can not realize the rotation impact test. When the impact test is carried out, a test sample can only be inclined by a certain angle, and the impact time calculated by the impact test is not instantaneous and has a certain time error; the invention provides a tangential acceleration elastic collision simulation device which adopts a mechanical control mode to realize acquisition of instantaneous collision load, and a speed regulation device realizes real-time acceleration of tires with different heights and realizes real simulation in a laboratory environment.

Disclosure of Invention

The invention aims to provide a tangential acceleration elastic collision simulation device, which realizes acquisition of instantaneous collision load, and a speed regulation device realizes real-time acceleration of tires with different heights and realizes real simulation in a laboratory environment.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to a tangential acceleration elastic collision simulation device, which comprises: the device comprises a main body frame, a power device, a collision device, a speed regulating device and a testing device; the main body frame is fixed on a ground foundation and is formed by welding high-quality structural steel pipes; the testing device is fixed on a ground foundation and positioned right below the main body frame, and when a tire impacts a test sample, the testing device collects impact load; the collision device includes: the device comprises a pendulum shaft I, a pendulum shaft II, a tire, an instantaneous control panel and a damper; the pendulum shaft I is hinged with the pendulum shaft II, the angle is controlled by the instantaneous control panel, and two ends of the damper are fixed on the pendulum shaft I and the pendulum shaft II; the instantaneous control panel includes: the rotating center of the sector disc is fixed at the upper end of the swing shaft II, and the shearing pin is clamped in a pin hole of the swing shaft I and a pin hole of the sector disc, so that the angle between the swing shaft I and the swing shaft II is kept unchanged in the processes of lifting and falling; the speed adjusting device comprises: the automatic speed regulation device comprises a universal vehicle body, a lifting device, a lifting platform, a driving motor, a ball spline shaft, a spline connecting shaft, a linear guide rail, a belt seat bearing, the spline connecting shaft, a friction driving wheel and a self-locking device, wherein the position and height regulation of the speed regulation device is realized through the universal vehicle body.

Furthermore, the lifting device is arranged in the universal vehicle body frame, the lifting platform is arranged at the top end of the lifting device, the driving motor is fixed on the lifting platform, the lifting device adopts a four-stage scissor fork structure, and the lifting device is driven by a lateral oil cylinder in a staggered manner, so that different height adjustment is realized; driving motor passes through the motor cabinet fixedly, the output shaft pass through the shaft coupling with ball spline shaft connects, carries out axial positioning through holding screw, ball spline shaft with spline connection axle cooperation is connected, spline connection axle pass through holding screw with the cooperation of area seat bearing, carry out axial positioning through holding screw, area seat bearing with linear guide's slider passes through bolted connection, linear guide's guide rail and drive arrangement are fixed on lift platform, drive through drive arrangement area seat bearing axial displacement, the friction drive wheel pass through bolt, parallel key with spline connection axle top is connected fixedly, the friction drive wheel with collision device's the perpendicular tangential contact of tire.

Furthermore, the friction driving wheel is made of hard rubber, is in arc surface contact with the tire of the collision device, reduces the contact area in the vertical direction, avoids sliding friction caused by linear velocity difference, and increases the rotation speed of the tire along with the increase of the friction driving wheel and the reduction of the tire contact radius of the collision device, thereby forming a tangential variable speed driving structure.

Further, the self-locking device comprises: the device comprises a supporting seat, a servo motor, a base, a ratchet shaft, a connecting rod II, a connecting rod I, a rubber roller, a ratchet and a pawl; the support seat is formed by welding two rectangular steel plates and is fixedly installed at the bottom of the frame of the main body support through a bolt, the servo motor is a horizontal motor and is installed on the base through a bolt, the base is connected with the bottom end of the steel plate horizontally placed on the support seat through a bolt, and an output shaft of the servo motor is connected with a coupler through a flat key to transmit power to the ratchet wheel; the pawl is installed on the side edge of the supporting seat through the ratchet shaft, a through hole is processed in the outer edge of the ratchet wheel and is fixedly connected with a pin shaft, the pawl is hinged with one end of the connecting rod I through the pin shaft, the outer side of the other end of the connecting rod I is fixedly connected with the rubber roller, the axis of the rubber roller is parallel to the axis of the universal wheel, the inner side of the other end of the connecting rod I is hinged with one end of the connecting rod II, and the other end of the connecting rod II is hinged with the supporting seat; the supporting seat, the connecting rod II, the connecting rod I and the ratchet wheel are connected to form a crank-rocker mechanism, the servo motor drives the ratchet wheel to rotate, when the ratchet wheel radius is collinear with the connecting rod I, the servo motor is controlled to stop, at the moment, the rubber roller is tightly attached to a universal wheel of a universal vehicle body, friction braking self-locking is achieved, at the moment, the ratchet wheel radius is collinear with the connecting rod I and located at a dead point position, a transmission angle of the system is zero, the pawl prevents the ratchet wheel from reversing, and braking self-locking of the universal vehicle body is achieved.

Drawings

FIG. 1: the invention relates to an integral structure diagram of a tangential acceleration elastic collision simulation device;

FIG. 2: the invention relates to a collision device structure diagram of a tangential acceleration elastic collision simulation device;

FIG. 3: the invention relates to a lifting part structure diagram of a tangential acceleration elastic collision simulation device;

FIG. 4: the invention relates to a structure diagram of a part of a speed regulating device of a tangential acceleration elastic collision simulation device;

FIG. 5: the invention relates to a self-locking device structure diagram of a tangential acceleration elastic collision simulation device;

in the figure: 1-main body frame, 2-power device, 3-collision device, 4-speed regulating device, 5-testing device, 31-swing shaft I, 32-swing shaft II, 33-tire, 34-instantaneous control disc, 35-damper, 40-universal vehicle body, 41-lifting device, 42-lifting platform, 43-driving motor, 44-ball spline shaft, 45-linear guide rail, 46-seated bearing, 47-spline connecting shaft, 48-friction driving wheel, 49-self-locking device, 51-supporting seat, 52-servo motor, 53-base, 54-ratchet shaft, 55-connecting rod II, 56-connecting rod I, 57-rubber roller, 58-ratchet wheel and 59-pawl.

Detailed Description

Specific implementations of the present invention are further described below in conjunction with the following figures.

As shown in fig. 1, 2, 3, 4 and 5, the tangential acceleration elastic collision simulation device of the present invention comprises: the device comprises a main body frame 1, a power device 2, a collision device 3, a speed regulating device 4 and a testing device 5; the main body frame 1 is fixed on a ground foundation and is formed by welding high-quality structural steel pipes; the power device 2 is arranged on the upper top surface of the main body frame 1, the middle of the power device 2 supports a swing shaft I31 of the collision device 3, the speed regulating device 4 accelerates the tire 33 of the collision device 3, the testing device 5 is fixed on a ground foundation and is positioned right below the main body frame 1, and when the tire 33 impacts a test sample, the testing device 5 collects impact load; the collision device 3 includes: a pendulum shaft I31, a pendulum shaft II32, a tire 33, a transient control panel 34 and a damper 35; the pendulum shaft I31 is hinged with the pendulum shaft II32, the angle is controlled by the instantaneous control panel 34, and two ends of the damper 35 are fixed on the pendulum shaft I31 and the pendulum shaft II 32; the momentary control dial 34 includes: the rotary center of the sector disc is fixed at the upper end of the swing shaft II32, and the shearing pin is clamped in a pin hole of the swing shaft I31 and a pin hole of the sector disc, so that the angle between the swing shaft I31 and the swing shaft II32 is kept unchanged in the processes of lifting and falling; the speed adjusting device 4 includes: the speed regulation device comprises a universal vehicle body 40, a lifting device 41, a lifting platform 42, a driving motor 43, a ball spline shaft 44, a linear guide rail 45, a belt seat bearing 46, a spline connecting shaft 47, a friction driving wheel 48 and a self-locking device 49, wherein the position and height of the speed regulation device 4 are regulated through the universal vehicle body 40.

As shown in fig. 1, 2, 3, 4 and 5, the working method of the tangential acceleration elastic collision simulation device of the present invention comprises the following specific steps: after the angles of the pendulum shaft I31 and the pendulum shaft II32 are controlled, the power device 2 drives the collision device 3 to rise; the universal vehicle body 40 drives the lifting platform 42 to a designated position, and the self-locking device 49 comprises: a supporting seat 51, a servo motor 52, a base 53, a ratchet shaft 54, a connecting rod II55, a connecting rod I56, a rubber roller 57, a ratchet 58 and a pawl 59; the supporting seat 51, the connecting rod II55, the connecting rod I56 and the ratchet wheel 58 are connected to form a crank-rocker mechanism, the servo motor 52 drives the ratchet wheel 58 to rotate, when the radius of the ratchet wheel 58 is collinear with the connecting rod I56, the servo motor is controlled to stop, at the moment, the rubber roller 57 is tightly attached to a universal wheel of the universal vehicle body 40 to realize friction braking self-locking, when the radius of the ratchet wheel 58 is collinear with the connecting rod I56 and is at a dead point position, a transmission angle of the system is zero, the pawl 59 prevents the ratchet wheel 58 from reversing to realize braking self-locking of the universal vehicle body 40, the self-locking device 49 is started to prevent the universal vehicle body 40 from moving, the lifting device 41 drives the driving motor 43, the ball spline shaft 44, the linear guide rail 45, the seated bearing 46, the spline connecting shaft 47 and the friction driving wheel 48 to lift, at the driving motor 43 is started, the driving motor 43 transmits power to, the linear guide rail 45 drives the pedestal bearing 46 and the spline connecting shaft 47 to axially move through a ball spline under the driving force, the contact position of the friction driving wheel 48 and the tire 33 is changed, the angular speed of the tire 33 is changed to realize stepless speed change acceleration, and the driving motor 43 is turned off after the acceleration is finished; start linear guide 45's servo motor reversal, drives under drive power take block bearing 46 with spline connecting axle 47 realizes axial return through the ball spline, will spline connecting axle 45 pullback will friction drive wheel 48 with tire 33 autosegregation, collision device 3 free fall, the area is fast tire 33 strikes the sample, testing arrangement 5 gathers impact load.

The scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A tangential acceleration elastic collision simulation device, characterized in that, comprising: a main frame (1), a power device (2), a collision device (3), a speed regulating device (4), and a testing device (5); The main body frame (1) is fixed on the ground foundation and is welded by high-quality structural steel pipes; the power device (2) is installed on the upper top surface of the main body frame (1), and the power device ( 2) The center supports the swing shaft I (31) of the collision device (3), the speed regulating device (4) accelerates the tire (33) of the collision device (3), and the testing device (5) When the tire (33) impacts the sample, the test device (5) collects the impact load; the collision device (3) comprises: a pendulum shaft I (31), swing shaft II (32), tires (33), momentary control disc (34), damper (35); the swing shaft I (31) is hinged with the swing shaft II (32), through The instantaneous control disk (34) controls the angle, and both ends of the damper (35) are fixed on the swing shaft I (31) and the swing shaft II (32); the instantaneous control disk (34) includes: a fan-shaped disc and shear pin, the rotation center of the sector disc is fixed on the upper end of the swing shaft II (32), and the shear pin is stuck in the pin hole of the swing shaft I (31) and the pin hole of the sector disc, so that the swing shaft I (31) The angle between (31) and the pendulum shaft II (32) remains unchanged during the lifting and dropping; the speed regulating device (4) includes: a universal vehicle body (40), a lifting device (41), a lifting device (41), a Platform (42), drive motor (43), ball spline shaft (44), linear guide rail (45), seat bearing (46), spline connection shaft (47), friction drive wheel (48), self-locking device (49), the position and height adjustment of the speed regulating device (4) is realized through the universal vehicle body (40).

2. A tangential acceleration elastic collision simulation device according to claim 1, characterized in that, the lifting device (41) is installed inside the frame of the universal vehicle body (40), and the lifting device (41) The lift platform (42) is installed at the top of the lift, the drive motor (43) is fixed on the lift platform (42), and the lift device (41) adopts a four-stage scissor fork structure, which is driven by a staggered lateral oil cylinder, Different height adjustment is achieved; the drive motor (43) is fixed by a motor seat, the output shaft is connected with the ball spline shaft (44) through a coupling, and is axially positioned by a set bolt, and the ball spline shaft (44) is matched and connected with the spline connecting shaft (47), the spline connecting shaft (47) is matched with the seated bearing (46) through the set screw, and the axial positioning is performed by the set screw, so the The seated bearing (46) is connected with the slider of the linear guide rail (45) by bolts, and the guide rail and the driving device of the linear guide rail (45) are fixed on the lifting platform (42), and the driving device drives the sliding block. The seated bearing (46) is axially displaced, the friction driving wheel (48) is connected and fixed with the top end of the spline connecting shaft (47) through bolts and flat keys, and the friction driving wheel (48) collides with the The tires of the device (3) are in vertical tangential contact.

3. A tangential acceleration elastic collision simulation device as claimed in claim 2, characterized in that: the friction driving wheel (48) is made of hard rubber material, and the tire of the collision device (3) is in camber contact, The contact area in the vertical direction is reduced to avoid the sliding friction caused by the difference in linear velocity, and as the friction driving wheel (48) rises, the contact radius of the tire with the collision device (3) is reduced so that the rotation speed of the tire is reduced Then it becomes larger, forming a tangential variable speed drive structure.

4. A tangential acceleration elastic collision simulation device according to claim 1, wherein the self-locking device (49) comprises: a support seat (51), a servo motor (52), a base (53) , ratchet shaft (54), connecting rod II (55), connecting rod I (56), rubber roller (57), ratchet wheel (58), pawl (59); the support seat (51) consists of two rectangular steel plates It is welded and installed on the bottom of the frame of the main body bracket (1) by bolts. The servo motor (52) adopts a horizontal motor and is installed on the base (53) by bolts. 53) The bottom end of the steel plate placed horizontally with the support seat (51) is connected by bolts, and the output shaft of the servo motor (52) and the coupling are connected by a flat key to transmit power to the ratchet (58); The ratchet (59) is installed on the side of the support seat (51) through the ratchet shaft (54), and a through hole is machined on the outer edge of the ratchet (58) to be fixedly connected to a pin, which is connected to the support through the pin. One end of the connecting rod I (56) is hinged, and the outside of the other end of the connecting rod I (56) is fixedly connected to the rubber roller (57), the axis of the rubber roller (57) and the axis of the universal wheel In parallel, the inner side of the other end of the connecting rod I (56) is hinged with one end of the connecting rod II (55), and the other end of the connecting rod II (55) is hinged with the support seat (51); the support The seat (51), the connecting rod II (55), the connecting rod I (56) and the ratchet wheel (58) are connected to form a crank-rocker mechanism, and the servo motor (52) drives the ratchet wheel (58) to rotate. (58) When the radius is collinear with the connecting rod I (56), control the servo motor to stop, at this time the rubber roller (57) is in close contact with the universal wheel of the universal vehicle body (40), The friction braking self-locking is realized. At this time, when the radius of the ratchet wheel (58) is collinear with the connecting rod I (56) at the dead center position, the transmission angle of the system is zero, and the pawl (59) prevents the The ratchet wheel (58) is reversed to realize the braking self-locking of the universal vehicle body (40).