CN116793885A

CN116793885A - Laser calibration system of hopkinson pole

Info

Publication number: CN116793885A
Application number: CN202310553677.7A
Authority: CN
Inventors: 刘石; 蔡传昕; 刘弈林
Original assignee: Air Force Engineering University of PLA
Current assignee: Air Force Engineering University of PLA
Priority date: 2023-05-17
Filing date: 2023-05-17
Publication date: 2023-09-22

Abstract

The utility model discloses a laser calibration system of a Hopkinson bar, which comprises an upper bar passing component, a laser centering mechanism, a base and a horizontal long bar, wherein the bar passing component is arranged on the upper side of the base through a supporting column; the laser centering mechanism is arranged at the lower side of the rod passing component; the base comprises a base shell, a combined transmission device and a bottom rolling ball moving mechanism which are arranged in the base shell; the horizontal long rod is symmetrically arranged between two adjacent bases; the system realizes the linear alignment of the support base by the cooperation of the horizontal long rod and the rolling ball support; the accurate centering of the supporting surface in the vertical direction is realized through the design of the laser centering device; the low-loss transmission of stress is realized through the contact of the universal ball and the dowel bar; through the design, the axes of the supporting surfaces of the supporting devices of the Hopkinson bars can be accurately collinear under the condition of different gradient ground, so that the reliable transmission of stress pulses is realized, and the device has the characteristics of high alignment efficiency, suitability for the condition of a laboratory with uneven ground and convenience in assembly and disassembly.

Description

Laser calibration system of hopkinson pole

Technical Field

The utility model relates to the technical field of Hopkinson bar support systems, in particular to a laser calibration system of a Hopkinson bar.

Background

The Hopkinson bar is a test system widely used for testing mechanical properties of materials under the action of high strain rate impact load, and has extremely important significance and wide application in the fields of deep resource development, weapon equipment research and development, tunnel chamber construction and the like. The precision and reliability of the test result are important bases for judging the quality of a set of test equipment, and the control of the low-loss effective transmission of high-strain rate pulses in the Hopkinson bar is a key means for ensuring the test precision.

The existing supporting device for the dowel bar in the patent related to the Hopkinson bar is not subjected to deeper analysis and precise design, so that the existing supporting device for the dowel bar cannot realize reliable and precise support of the Hopkinson bar suitable for various slopes of ground. The utility model patent with the application number of CN201922065723 discloses a coaxial auxiliary bracket of a Hopkinson rod, and the bracket can conveniently and firmly support the Hopkinson rod through novel locking long bolts, an L-shaped base, a penetrating cylinder and other mechanical designs, but when the bracket is specifically used, the bracket does not consider the problems of loss and flatness of a supporting device in the stress wave transmission process, so that the experimental precision of the bracket is lower when the bracket is used. The utility model patent with the application number of CN202211254459 discloses an accurate alignment device for aligning an incidence rod and a transmission rod of a separated Hopkinson rod, and the accurate alignment of the Hopkinson rod and the low-loss transmission of stress waves can be realized through the design of an adjustable supporting device and a universal ball, but the alignment and leveling process by matching with a dial indicator is complex, and the use is inconvenient.

In view of the above, there is a need to design a laser calibration system for hopkinson rods to solve the above problems of the prior art.

Disclosure of Invention

Aiming at the problems, the utility model aims to provide a laser calibration system of a Hopkinson bar, which realizes the linear alignment of a supporting base by matching a horizontal long bar with a rolling ball support; the accurate centering of the supporting surface in the vertical direction is realized through the design of the laser centering device; the low-loss transmission of stress is realized through the contact of the universal ball and the dowel bar; through the design, the axes of the supporting surfaces of the supporting devices of the Hopkinson bars can be accurately collinear under the condition of different gradient ground, so that the reliable transmission of stress pulses is realized, and the device has the characteristics of high alignment efficiency, suitability for the condition of a laboratory with uneven ground and convenience in assembly and disassembly.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a laser calibration system of a Hopkinson bar comprises an upper bar passing component, a laser centering mechanism, a base and a horizontal long bar;

the rod passing component is arranged on the upper side of the base through a stay;

the laser centering mechanism is arranged at the lower side of the rod passing component;

the base is arranged at the lower end of the stay post and comprises a base shell, a combined transmission device and a bottom rolling ball moving mechanism, wherein the combined transmission device and the stay post are arranged in the base shell, the laser centering mechanism is matched with the combined transmission device for use, and the bottom rolling ball moving mechanism is arranged at the bottom of an inner cavity of the base shell;

the horizontal long rod is symmetrically arranged between two adjacent bases.

Preferably, the upper part of the rod passing component is also provided with a horizontal laser emitting device or a scale plate, and the horizontal laser emitting device and the scale plate are arranged on the same horizontal straight line.

Preferably, the through rod part is provided with a through connection port, and a plurality of embedded rolling balls are embedded in the through connection port to be matched with an experimental instrument.

Preferably, the laser centering mechanism is arranged right below the rod passing component and comprises a vertical laser emitting device and a dial;

the vertical laser emission device is arranged right below the rod passing component;

the calibrated scale is arranged below the vertical laser emission device and is connected with the vertical laser emission device through the flexible connecting piece, and the calibrated scale can ensure that the center points of the calibrated scale and the vertical laser emission device are positioned on the same vertical line only when the vertical laser emission device is vertical.

Preferably, the combined transmission device comprises a linkage control mechanism, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are matched with the stay post for use, and the linkage control mechanism comprises a first driving gear, a second driving gear and a plurality of third adjusting gears;

the first driving gear is rotatably arranged on the base shell, and an adjusting handle is arranged on the first driving gear;

the second driving gear is meshed with the first driving gear;

the third adjusting gear is arranged in the base shell through the adjusting rod and meshed with the second driving gear, the third adjusting gear is matched with the first driving mechanism and the second driving mechanism, a clamping block is further arranged on the adjusting rod and matched with a clamping groove arranged on the upper cover plate of the base shell, and the height of the third adjusting gear is adjusted.

Preferably, the first driving mechanism comprises a first driven gear and a second driven gear;

the first driven gear is rotatably arranged in the base shell and meshed with the third adjusting gear;

the second driven gear is meshed with the first driven gear and is connected with the supporting column in a threaded mode.

Preferably, the second driving mechanism comprises a first driving chain, a third driven gear, a fourth driven gear and a fifth driven gear;

the third driven gear is rotatably arranged in the base shell and meshed with the third adjusting gear and the fourth driven gear;

the fourth driven gear and the fifth driven gear are both arranged in the base shell, and the fifth driven gear is in threaded connection with the stay;

the first drive chain is disposed between and in mesh with the fourth and fifth driven gears.

Preferably, the bottom ball moving mechanism is arranged at the bottom of the inner cavity of the base shell and comprises a third driving gear, a ball mounting seat, a second driving chain, a sixth transmission gear and a double-row adjusting gear;

the rolling ball mounting seat is arranged at the lower end of the base shell, and a universal rolling ball is arranged at the bottom of the rolling ball mounting seat in a rolling way;

the sixth transmission gear and the double-row adjusting gear are both arranged on the rolling ball mounting seat in a threaded manner and meshed with the second driving chain;

the second driving chain is arranged between the sixth transmission gear and/or the double-row adjusting gears which are symmetrically arranged and meshed with the sixth transmission gear and/or the double-row adjusting gears;

the sixth transmission gear is arranged outside the base shell through a gear mounting rod and meshed with the second driving chain.

Preferably, the method for using the laser calibration system comprises the following steps:

step 1: the whole experimental equipment is placed on a relatively flat field, a third driving gear rotates to drive a sixth transmission gear to rotate, a second driving chain is driven to rotate by the sixth transmission gear, the second driving chain drives the sixth transmission gear and the double-row adjusting gear to rotate through linkage adjustment action of meshing relation, the height of a rolling ball mounting seat relative to the bottom of a base shell is adjusted, so that a universal rolling ball can act on the ground, and an instrument can be moved;

step 2: moving the positions of all instruments, connecting the instruments one by using a horizontal long rod, centering the instruments in the horizontal direction and fixing the instruments, and rotating the bottom rolling ball moving device to retract and fix the bottom rolling ball;

step 3: the vertical laser emission device of the laser leveling device is opened, the position of laser on the dial is observed, a stay bar with the height needing to be changed is selected, the height of a third adjusting gear is firstly adjusted through an adjusting rod, an adjusting handle is rotated to drive a second driven gear or a fifth driven gear to rotate, the height of the stay bar can be differentially adjusted by a linkage control mechanism, the laser is arranged at the central position of the dial, and vertical calibration operation is completed; then, the adjusting handle is rotated to drive the two second driven gears and the two fifth driven gears to rotate according to the requirement, so that the overall height of the rod passing component is adjusted to meet the experimental requirement;

step 4: after the adjustment is completed, the adjusting handle is taken down, so that the influence of external coiling on the position of the stay is avoided.

Preferably, the horizontal centering process in step 2 includes:

step 2.1, after the instrument leveling and horizontal centering steps are completed, opening a laser emitting device at the upper part, and enabling laser to just hit the right center of the scale plate, so as to indicate that the device at the position of the scale plate is centered;

step 2.2, detaching the first scale plate, wherein the second scale plate is not centered with the laser emission device; selecting a second device, and fully connecting four third adjusting gears on the second device for integral reduction;

step 2.3, after the operation is finished, the device at the position B finishes centering, and the scale plate B is taken down;

step 2.4, if the centering laser of the C scale plate and the laser emitting device just after operation is performed, the C scale plate is centered by the device at the C part;

and (5) centering sequentially, and starting a next experiment after the whole instrument is centered.

The beneficial effects of the utility model are as follows: the utility model discloses a laser calibration system of a Hopkinson bar, which is improved compared with the prior art in that:

the utility model designs a laser calibration system of a Hopkinson bar, which comprises a bar passing component, a laser centering mechanism, a base and a horizontal long bar, wherein the bar passing component is matched with the bar passing component at the upper part of the bar passing component, the bar passing component is arranged at the upper side of the base through a supporting column, the laser centering mechanism is arranged at the lower side of the bar passing component, the base is arranged at the lower end of the supporting column and comprises a base shell, and a combined transmission device and a bottom rolling ball moving mechanism which are arranged on the base shell, when the laser calibration system is used:

1. through the setting of laser centering mechanism, can be according to the position of laser that laser emission device launched on the calibrated scale when using, whether the upper portion structure supporting surface is accurate centering in vertical direction is discerned fast, accomplish the alignment of light of vertical direction.

2. Through the arrangement of the combined transmission device and the strut adjusting mechanism, the relative height of the strut in the base can be quickly adjusted during use; meanwhile, the relative heights of the supporting columns in the base are adjusted in a differentiated mode, so that the four supporting columns are adjusted together and independently, accurate centering of the supporting surface in the vertical direction is achieved, and experimental precision and adjusting efficiency are improved.

3. Through the setting of bottom spin moving mechanism, can be convenient for adjust the bottom height of spin mount pad relative base shell for universal spin can be used on subaerial, removes and highly adjusts this device.

4. The calibration system can realize low-loss transmission of stress through the contact of the universal rolling ball and the dowel bar; through the design, the axes of the supporting surfaces of the supporting devices of the Hopkinson bars can be accurately collinear under the condition of different gradient ground, so that the reliable transmission of stress pulses is realized, and the device has the advantages of high alignment efficiency, suitability for the condition of a laboratory with uneven ground and convenience in assembly and disassembly.

Drawings

Fig. 1 is a diagram showing the installation effect of the laser calibration system of the hopkinson bar of the present utility model.

Fig. 2 is a schematic structural view of the apparatus of the present utility model.

Fig. 3 is a schematic view of the structure of the upper through-rod assembly of the present utility model.

Fig. 4 is a schematic structural view of the laser centering mechanism of the present utility model.

Fig. 5 is a schematic structural view of the base housing of the present utility model.

Fig. 6 is a cross-sectional view of the base housing of the present utility model.

Fig. 7 is a schematic structural view of the joint transmission device of the present utility model.

Fig. 8 is a schematic structural view of the linkage control mechanism of the present utility model.

Fig. 9 is a schematic structural view of a third adjusting gear of the present utility model.

Fig. 10 is a schematic structural view of a first driving gear of the present utility model.

Fig. 11 is a schematic structural view of the first driving mechanism 3-3 and the second driving mechanism of the present utility model.

Fig. 12 is a schematic structural view of the bottom ball moving mechanism of the present utility model.

Fig. 13 is an exploded view of the third drive gear of the present utility model.

Fig. 14 is a diagram showing a horizontal pole installation sample of the present utility model.

Fig. 15 is a schematic diagram of the adjustment of the light centering process of the present utility model.

Fig. 16 is a schematic diagram of differential adjustment of the stay of the present utility model.

Wherein: in fig. 16, the connecting lines represent the corresponding support columns controlled by the third adjusting gear, and the corresponding support columns can be adjusted when the corresponding gears are put down and the control device is rotated;

in fig. 1-16: 1. the device comprises a rod passing component 1-1, a through connection port 1-2, an embedded rolling ball 2, a laser centering mechanism 2-1, a vertical laser emitting device 2-2, a dial 2-3, a flexible connecting rope 3, a base 3-1, a base shell 3-2, a linkage control mechanism 3-2-1, a first driving gear 3-2-2, a second driving gear 3-2-3, a third adjusting gear 3-2-4, an adjusting rod 3-2-5, an adjusting handle 3-3, a first driving mechanism 3-3-1, a first driven gear 3-3-2 and a second driven gear 3-3-1, 3-4, second drive mechanism, 3-4-1, first drive chain, 3-4-2, third driven gear, 3-4-3, fourth driven gear, 3-4-4, fifth driven gear, 3-5, bottom ball movement mechanism, 3-5-1, third drive gear, 3-5-2, ball mount, 3-5-3, second drive chain, 3-5-4, sixth drive gear, 3-5-5, universal ball, 3-5-6, double row adjustment gear, 3-5-7, gear mount bar, 4, horizontal long bar, 5, stay, 6, horizontal laser emitting device, 7, scale plate.

Detailed Description

In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.

Example 1: referring to the laser calibration system of the Hopkinson bar shown in fig. 1-16, the laser calibration system comprises an upper bar passing component 1, a laser centering mechanism 2, a base 3 and a horizontal long bar 4, wherein the bar passing component 1 is arranged on the upper side of the base 3 through a supporting column 5 and is used for accommodating each experimental component or input and output rod piece in an experiment, a horizontal laser emitting device 6 or a scale plate 7 is further arranged on the upper part of the bar passing component 1 for horizontal centering, and the horizontal laser emitting device 6 and the scale plate 7 are arranged on the same horizontal line;

the laser centering mechanism 2 is arranged at the lower side of the rod passing component 1 and is used for vertically centering the upper rod passing structure;

the base 3 is arranged at the lower end of the supporting column 5 and comprises a base shell 3-1, a combined transmission device and a bottom rolling ball moving mechanism 3-5, wherein the combined transmission device and the bottom rolling ball moving mechanism are arranged in the base shell 3-1, the combined transmission device is arranged at the upper part of an inner cavity of the base shell 3-1 and is used for adjusting the height of the supporting column 5 and the centering of the laser centering mechanism 2, and the bottom rolling ball moving mechanism 3-3 is arranged at the bottom of the inner cavity of the base shell 3-1 and is used for moving the base shell 3-1 when in use;

the horizontal long rods 4 are symmetrically arranged on the two adjacent bases 3 and used for connecting the bases 3, completing the centering of the instrument in the horizontal direction and completing the fixation.

Preferably, in order to facilitate the installation of each experimental part, input/output rod piece or test piece in the experiment when in use, the rod passing part 1 is also provided with a through connection port 1-1, and in order to change the sliding friction of the rod piece into rolling friction when in use, reduce the friction force, the through connection port 1-1 is also embedded with a plurality of embedded rolling balls 1-2 so as to ensure that the rod piece in the through connection port is kept stable and reduce the friction; when the experimental device is used, the friction between the rod piece and the instrument during the experiment can be effectively reduced by putting the through connection port 1-1 of the upper rod passing component into the rod piece from back to front and the embedded rolling ball 1-2 in the middle, so that the experimental result is more accurate.

Preferably, in order to ensure the absolute level of the upper rod passing structure during the installation and experiment, a laser centering mechanism 2 is arranged right below the rod passing component 1 and comprises a vertical laser emitting device 2-1 and a dial 2-2;

the upper vertical laser emitting device 2-1 is fixedly arranged right below the rod passing component 1;

the dial 2-2 is arranged below the vertical laser emission device 2-1 and is connected with the vertical laser emission device 2-1 through four flexible connecting ropes 2-3 with the same length, and the dial 2-2 can ensure that the center points of the two are positioned on the same vertical straight line only when the upper vertical laser emission device 2-1 is vertical; at the moment, the laser emitted from the upper part is just positioned in the middle of the dial 2-1, and the instrument meets the leveling requirement; meanwhile, the dial is convenient for an operator to observe the horizontal inclined direction of the instrument, so that the leveling is convenient; when the laser leveling device is used, after the upper vertical laser emitting device 2-1 is opened, light is emitted to the dial 2-2, the deviation of the instrument leveling direction at the moment is judged according to the position of laser on the dial 2-1, and finally the leveling is performed by utilizing the combined transmission device 3-2.

Preferably, in order to facilitate the relative height of the four struts 5 in the base housing 3-1, the joint transmission device is designed to include a linkage control mechanism 3-2, a first driving mechanism 3-3 and a second driving mechanism 3-4, the first driving mechanism 3-3 and the second driving mechanism 3-4 are matched with the struts 5 for use, and the linkage control mechanism 3-2 is meshed with the first driving mechanism 3-3 and the second driving mechanism 3-4, and when in use, the linkage control mechanism 3-2 drives the first driving mechanism 3-3 and the second driving mechanism 3-4 to move to adjust the relative height of the struts 5 in the base housing 3-1.

Preferably, the coordinated control mechanism 3-2 comprises a first driving gear 3-2-1, a second driving gear 3-2-2 and a plurality of third adjusting gears 3-2-3;

the first driving gear 3-2-1 is rotatably arranged in a caulking groove on the base shell 3-1, the first driving gear 3-2-1 is provided with an adjusting handle 3-2-5, and the adjusting handle 3-2-5 is rotated to drive the first driving gear 3-2-1 to rotate when the device is used;

the second driving gear 3-2-2 is rotatably arranged in the base shell 3-1 and is meshed with the first driving gear 3-2-1, and the second driving gear 3-2-2 is driven to rotate by the first driving gear 3-2-1 when in use;

the third adjusting gear 3-2-3 is rotatably arranged in the base shell 3-1 and is meshed with the second driving gear 3-2-2, the second driving gear 3-2-2 drives the third adjusting gear 3-2-3 to rotate, the third adjusting gear 3-2-3 is matched with the first driving mechanism 3-3 and the second driving mechanism 3-4 to be used, and the third adjusting gear 3-2-3 drives the first driving mechanism 3-3 and the second driving mechanism 3-4 to rotate during use, so that the relative height of the stay 5 in the base shell 3-1 is adjusted.

Preferably, in order to avoid the position of the stay 5 from changing due to the winding of the first driving gear 3-2-1 after the adjustment is completed, the adjusting handle 3-2-5 is detachably installed at the outer eccentric position of the first driving gear 3-2-1.

Preferably, in order to facilitate the adjustment of the height of the third adjusting gear 3-2-3 during use, the height of the strut 5 can be differentially adjusted by the linkage control mechanism 3-2 during use, so that the centering mechanism 2 can be quickly centered, the third adjusting gear 3-2-3 is designed to be rotatably installed in the base housing 3-1 through the adjusting lever 3-2-4, and the clamping block is arranged on the adjusting lever 3-2-4 to be matched with the clamping groove arranged on the upper cover plate of the base housing 3-1 for use, namely, the height of the third adjusting gear 3-2-3 is differentially adjusted by adjusting the position of the clamping block in the clamping groove during use, so that the height of the strut 5 can be differentially adjusted by the linkage control mechanism 3-2 during use.

Preferably, in order to facilitate the adjustment of the heights of the struts 5 symmetrically arranged at both sides of the linkage control mechanism 3-2, the first driving mechanism 3-3 is designed to comprise a first driven gear 3-3-1 and a second driven gear 3-3-2;

the first driven gear 3-3-1 is rotatably arranged in the base shell 3-1 and meshed with the third adjusting gear 3-2-3, and the first driven gear 3-3-1 is driven to rotate through the third adjusting gear 3-2-3;

the second driven gear 3-3-2 is rotatably arranged in the base shell 3-1, is meshed with the first driven gear 3-3-1 and is in threaded connection with the stay 5, and when the device is used, the position of the stay 5 in the base shell 3-1 is adjusted by rotating the second driven gear 3-3-2, so that the centering mechanism 2 can be quickly centered, and meanwhile, the height of the rod passing component 1 is adjusted, so that the height meets experimental requirements.

Preferably, in order to facilitate the adjustment of the heights of the two struts 5 at the end far away from the linkage control mechanism 3-2, the second driving mechanism 3-4 is designed to comprise a first driving chain 3-4-1, a third driven gear 3-4-2, a fourth driven gear 3-4-3 and a fifth driven gear 3-4-4;

the third driven gear 3-4-2 is rotatably arranged in the base shell 3-1, is meshed with the third adjusting gear 3-2-3 and the fourth driven gear 3-4-3, and drives the fourth driven gear 3-4-3 to rotate through the third adjusting gear 3-2-3;

the fourth driven gear 3-4-3 is rotatably arranged in the base shell 3-1;

the fifth driven gear 3-4-4 is rotatably arranged in the base shell 3-1 and is in threaded connection with the stay 5;

the first driving chain 3-4-1 is arranged between the fourth driven gear 3-4-3 and the fifth driven gear 3-4-4 and is meshed with the fourth driven gear 3-4-3 and the fifth driven gear 3-4-4, and when the device is used, the first driving chain 3-4-1 drives the fifth driven gear 3-4-4 to rotate so as to adjust the position of the stay 5 in the base shell 3-1, so that the centering mechanism 2 can be centered quickly, and meanwhile, the height of the rod passing component 1 is adjusted, so that the height of the rod passing component meets experimental requirements.

The use process and principle of the laser calibration system of the hopkinson bar in the embodiment include:

note that: the experimental device consists of a plurality of independent supporting systems, and the number and the interval of the supporting systems can be independently selected according to experimental requirements during experiments; in fig. 1, only the send-out part and the intermediate part (end part) are drawn for the convenience of observation;

step 1: placing the whole experimental equipment on a relatively flat field, and rotating the bottom rolling ball moving mechanism 3-3 to lower and support the bottom rolling ball to form an integral device, so that the instrument can be moved;

step 2: the horizontal long rods 4 are connected with the instrument one by one, so that the instrument is centered in the horizontal direction and fixed, and then the bottom rolling ball moving device is rotated to retract and fix the bottom rolling ball;

step 3: turning on a vertical laser emission device 2-1 in the laser leveling device, observing the position of laser striking on a dial 2-2, selecting a stay 5 with the height to be changed, firstly adjusting the height of a third adjusting gear 3-2-3 by an adjusting rod 3-2-4, and rotating an adjusting handle 3-2-5 to drive a second driven gear 3-2 or a fifth driven gear 3-4-4 to rotate, so that the height of the stay 5 can be differentially adjusted by a linkage control mechanism 3-2 when the laser leveling device is used, the laser striking on the central position of the dial 2-2, and finishing vertical calibration operation; then, the adjusting handle 3-2-5 is rotated to drive the two second driven gears 3-3-2 and the two fifth driven gears 3-4-4 to rotate according to the requirement, so that the overall height of the rod passing component 1 is adjusted to meet the experimental requirement;

step 4: after the adjustment is completed, the adjusting handle 3-2-5 is taken down, so that the position of the stay 5 is prevented from being influenced by external coiling.

The horizontal alignment process described in step 2 includes:

step 2.1. As shown in figure 15, after the instrument leveling and horizontal centering steps are completed, turning on the upper laser emitting device 6 to have the centering condition as in (1), and enabling the laser to just hit the middle of the scale plate nail 7, so as to indicate that the device at the nail is centered;

step 2.2, detaching the scale plate A, wherein the scale plate A has the centering condition as shown in the step (2); at this time, the second scale plate 7 is not centered with the laser emitting device 6; so we choose the second device, connect all four third regulating gears 3-2-3 on the second device, carry on the overall reduction;

step 2.3, after the operation is finished, the centering condition as in (3) exists, and the second scale plate 7 is taken down at the moment;

step 2.4, the centering condition is changed into (4), the laser is beaten to the center of the C scale plate 7 just after operation, and the centering condition is good;

Example 2: unlike the above embodiment 1, in order to adjust the height of the base 3 while facilitating the movement of the base 3 in use, the bottom ball moving mechanism 3-5 is designed to include a third driving gear 3-5-1, a ball mount 3-5-2, a second driving chain 3-5-3, a sixth driving gear 3-5-4 and a double row adjusting gear 3-5-6;

the rolling ball mounting seat 3-5-2 is arranged at the lower end of the base shell 3-1, and a universal rolling ball 3-5-5 is arranged at the bottom of the rolling ball mounting seat 3-5-2 in a rolling way;

the sixth transmission gear 3-5-4 and the double-row adjusting gear 3-5-6 are both arranged on the rolling ball mounting seat 3-5-2 in a threaded manner and meshed with the second driving chain 3-5-3;

the second driving chain 3-5-3 is arranged between the sixth transmission gear 3-5-4 and/or the double-row adjusting gear 3-5-6 which are symmetrically arranged and is meshed with the sixth transmission gear 3-5-4 and/or the double-row adjusting gear 3-5-6;

the sixth transmission gear 3-5-4 is detachably arranged on the outer side of the base shell 3-1 through a gear mounting rod 3-5-7 and is meshed with the second driving chain 3-5-3, namely, when the universal rolling ball type base shell 3-1 is used, the second driving chain 3-5-3 is driven to rotate through rotation of the sixth transmission gear 3-5-4, the second driving chain 3-5-3 drives the sixth transmission gear 3-5-4 and the double-row adjusting gear 3-5-6 to rotate through linkage adjustment of meshing relationship, the height of the rolling ball mounting seat 3-5-2 relative to the bottom of the base shell 3-1 is adjusted, so that the universal rolling ball type base shell 3-5-5 can act on the ground, and the base shell 3-1 is moved and the height of the base shell 3-1 is adjusted.

Preferably, in order to play a role of dust prevention, the third driving gear 3-5-1 and the sixth driving gear 3-5-4 are protected, a mounting box 3-5-8 is further arranged on the outer side of the base shell 3-1, and when the dust prevention device is used, the third driving gear 3-5-1 and the sixth driving gear 3-5-4 are mounted in the mounting box 3-5-8, and the handle arranged on the eccentric position on the outer side of the third driving gear 3-5-1 is rotated to drive the third driving gear 3-5-1.

The use process and use principle of the bottom ball moving mechanism 3-3 in this embodiment include:

step 1.1: when the equipment needs to be moved, the third driving gear 3-5-1 rotates to drive the sixth driving gear 3-5-4 to rotate, the sixth driving gear 3-5-4 drives the second driving chain 3-5-3 to rotate, the second driving chain 3-5-3 drives the sixth driving gear 3-5-4 and the double-row adjusting gear 3-5-6 to rotate through the linkage adjusting function of the meshing relationship, the height of the ball mounting seat 3-5-2 relative to the bottom of the base shell 3-1 is adjusted, and the universal ball 3-5-5 can act on the ground to move the equipment. Meanwhile, the adjusting process has the function of adjusting the height of the base shell 3-1 so that the height of the base shell meets the experimental requirements.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A laser calibration system for hopkinson bars, characterized by: comprises an upper rod passing component, a laser centering mechanism, a base and a horizontal long rod;

the horizontal long rod is symmetrically arranged between two adjacent bases.

2. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the upper part of the rod passing component is also provided with a horizontal laser emission device or a scale plate, and the horizontal laser emission device and the scale plate are arranged on the same horizontal line.

3. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the rod passing component is provided with a through connecting port, and a plurality of embedded rolling balls are embedded in the through connecting port and are matched with an experimental instrument for use.

4. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the laser centering mechanism is arranged right below the rod passing component and comprises a vertical laser emitting device and a dial;

5. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the combined transmission device comprises a linkage control mechanism, a first driving mechanism and a second driving mechanism, wherein the first driving mechanism and the second driving mechanism are matched with the stay column for use, and the linkage control mechanism comprises a first driving gear, a second driving gear and a plurality of third adjusting gears;

the second driving gear is meshed with the first driving gear;

6. A hopkinson bar laser calibration system as set forth in claim 5 wherein: the first driving mechanism comprises a first driven gear and a second driven gear;

7. A hopkinson bar laser calibration system as set forth in claim 5 wherein: the second driving mechanism comprises a first driving chain, a third driven gear, a fourth driven gear and a fifth driven gear;

8. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the bottom rolling ball moving mechanism is arranged at the bottom of the inner cavity of the base shell and comprises a third driving gear, a rolling ball mounting seat, a second driving chain, a sixth transmission gear and a double-row adjusting gear;

9. A hopkinson bar laser calibration system as set forth in claim 1 wherein: the using method of the laser calibration system comprises the following steps:

10. A hopkinson bar laser calibration system as set forth in claim 9 wherein: the horizontal centering process in the step 2 comprises the following steps: