CN105651527B - Portable rigid testboard bay - Google Patents

Abstract

The invention relates to the technical field of automobile rigidity testing, in particular to a portable rigidity test bench, which includes a bracket assembly, a guide rod, a pressure head rod, a force sensor and a displacement sensor. magnet, the guide rod is fixed on the bracket assembly and can slide axially, the displacement sensor is fixed on the bracket assembly, the end of the measuring rod of the displacement sensor is fixedly connected with the guide rod, and one end of the force sensor is connected to the guide rod. The bottom of the guide rod is fixed, and the other end is fixed to the top of the pressure head rod, and the bottom of the pressure head rod is fixed with a loading head. The movable bracket assembly is used to test the rigidity of the car with the pressure head rod, force sensor and displacement sensor. It is small in size and easy to carry. Since the displacement sensor is fixed on the bracket assembly, it will not move relative to the loading point with the hand. , the measurement result is accurate.

Description

Portable rigid test bench

technical field

The invention relates to the technical field of automobile rigidity testing, in particular to a portable rigidity testing stand.

Background technique

The rigidity of the car is related to the ability of the car to deal with accidents such as collisions and rollovers, the improvement of handling performance, the comfort when driving on bad roads, and the durability of the car. At present, the rigidity testing of automotive components is mainly carried out by robots and push-pull force gauges. For the robot, due to its large size, there are three main problems: 1) It is not easy to reach some loading points inside the body; 2) For some rigid tests that need to be carried out in the environmental chamber, the robot cannot enter the environmental chamber and cannot test. 3) The cost of using robots for loading is too high and takes up a lot of space. The main problem of the traditional push-pull dynamometer is that during the manual push-pull process, due to the reaction force of the loading force, the displacement sensor will move with the hand relative to the loading point, causing the measured displacement to not reflect the actual deformation, and the measurement results are not accurate enough.

Contents of the invention

In order to solve the above technical problems, the present invention provides a portable rigid test bench with simple structure, small size, easy movement and accurate measurement results.

The technical solution of the present invention is: a portable rigid test bench, including a bracket assembly, a guide rod, a pressure head rod, a force sensor and a displacement sensor, the bottom of the bracket assembly is hinged with a magnet for adsorption and fixation to the ground, the The guide rod is arranged on the bracket assembly and can slide axially, the displacement sensor is fixed on the bracket assembly, the end of the displacement sensor measuring rod is fixedly connected with the guide rod, one end of the force sensor is fixed to the bottom of the guide rod, The other end is fixed to the top of the indenter rod, and the bottom of the indenter rod is fixed with a loading head. The movable bracket assembly is used to test the rigidity of the car with the pressure head rod, force sensor and displacement sensor. It is small in size and easy to carry. Since the displacement sensor is fixed on the bracket assembly, it will not move relative to the loading point with the hand. , the measurement result is accurate.

Further, a data acquisition board is fixed horizontally on the bottom of the guide rod, and the top surface of the data acquisition board is threadedly connected to the end of the measuring rod of the displacement sensor through the transition shaft of the displacement sensor. The measuring rod and the guide rod of the displacement sensor are fixed together by the data acquisition board, and the structure is simple, which ensures that the displacement sensor will not move relative to the loading point with the hand, and the measurement result is accurate.

Further, a ball joint is provided between the transition shaft of the displacement sensor and the data acquisition board, and the ball end of the ball joint is screwed to the transition shaft of the displacement sensor, and the ball joint The fixed seat is fixedly connected with the end surface of the data acquisition board, and the ball head of the ball joint and the ball socket of the ball joint cooperate with each other. The ball-joint universal joint is arranged between the transition shaft of the displacement sensor and the data acquisition board, which can eliminate the assembly and processing errors of the structure itself, and further ensure the accuracy of the measurement results.

Further, the bracket assembly includes two length-adjustable support rods and a connecting rod connected to the supporting rods, the magnet is arranged at the bottom of the supporting rods, and the middle part of the supporting rods is sleeved with a connecting rod tight. The connecting rod tightener is threadedly connected with the connecting rod, the connecting rod is provided with a plurality of positioning holes, and the connecting rods of the two supporting rods pass through the positioning holes of the two connecting rods. The handle screw connection is fixed. The bracket assembly is fixed by magnets to facilitate the movement of the device, and the length-adjustable support rod is used as the support of the bracket assembly, and is connected with the upper and lower parts in a hinged manner. According to the angle requirements of the test, the length and angle of the support rod can be adjusted, and the angle of the support rod can be fixed by adjusting the angle of the connecting rod and the position of the positioning hole, so that the device can be loaded at any angle, which is flexible and convenient.

Further, the support rod includes an upper screw rod, a lower screw rod that rotates in the opposite direction to the upper screw rod, and a screw sleeve that is threadedly connected with the upper and lower screw rods, the top of the upper screw rod is hinged to the bottom of the installation box, the The bottom of the lower screw rod is hinged with the magnet. By rotating the screw sleeve, the length of the support rod can be adjusted, and the structure is simple and reliable.

Further, the bracket assembly also includes an installation box, the installation box includes a top plate, a bottom plate and side plates for connecting the top plate and the bottom plate, the bottom of the bottom plate of the installation box is hinged with two support rods, the installation box The inner side of the side plate is fixed with a displacement sensor fixing seat, the displacement sensor is fixed on the displacement sensor fixing seat, the measuring rod of the displacement sensor stretches out from the bottom of the installation box, and is threadedly connected with the top of the displacement sensor transition shaft. Setting the displacement sensor in the installation box ensures that the displacement sensor is not damaged.

Further, the installation box also includes a door panel, the door panel is hinged to the side panel of the installation box, the surface of the guide rod is axially provided with an anti-rotation slot, and the inner side of the door panel is fixed with a anti-rotation slot matching the anti-rotation slot. key. The anti-rotation groove on the guide rod cooperates with the anti-rotation key inside the door panel to prevent the radial rotation of the guide rod during loading, ensure the accuracy of the loading position, and improve the test accuracy.

Further, a linear bearing is fixed at the center of the top plate and the bottom plate of the installation box, the guide rod passes through the top plate and the bottom plate of the installation box, and is slidingly matched with the linear bearing. The sliding fit of the linear bearing and the guide rod has small friction and high displacement accuracy, which ensures the accuracy of the experimental results.

Further, the linear bearing includes a linear bearing body and a bearing fixing plate located at the end of the linear bearing body and having a diameter larger than the outer diameter of the linear bearing body. The center of the top plate and the bottom plate of the installation box is provided with a stepped hole. The linear bearing body Through the stepped hole, the bearing fixing plate at the end cooperates with the stepped surface of the stepped hole and is fixed to each other by bolts. Using this structure to fix the linear bearing has a simple structure and a reliable fixing method.

Further, handles are fixed on both sides of the installation box. A hand-held handle is provided to facilitate the carrying of the entire device.

Further, a pressing hand plate for applying force to the guide rod is fixed on the top of the guide rod. Set the pressing hand plate, which is convenient for testing force.

In summary, the present invention has the advantages of simple structure, portability, low manufacturing cost and high measurement accuracy.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is the structural representation of support bar;

Fig. 3 is a schematic structural diagram of the internal components of the installation box of the present invention;

Figure 4 is a schematic diagram of the installation structure of the displacement sensor;

Fig. 5 is a longitudinal sectional view of Fig. 3;

In the figure: 1—magnet, 2—lower screw rod, 3—screw rod sleeve, 4—connecting rod tightener, 5—upper screw rod, 6—hand-held handle, 7—press hand plate, 8—guide rod, 9 —Installation box, 10—Displacement sensor, 11—Transition shaft of displacement sensor, 12—Ball joint, 13—Data acquisition board, 14—Force sensor, 15—Handle screw, 16—Connecting rod, 17—Indenter rod , 18—loading head, 19—anti-rotation key, 20—linear bearing, 20a—linear bearing body, 20b—bearing fixing plate, 21—door panel, 22—anti-rotation groove, 23—displacement sensor mounting seat.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1 , the device includes a magnet 1 , a bracket assembly, a guide rod 8 , an indenter rod 17 , a force sensor 14 , a displacement sensor 10 and an installation box 9 . The bracket assembly is adsorbed and fixed to the ground through the magnet 1. In this embodiment, the magnet 1 is an electromagnet, and the ground is an iron floor. The bracket assembly includes two length-adjustable support rods, a magnet 1 hinged to the bottom of the support rods and a connecting rod 16 connected with the support rods. The middle part of the support rod is equipped with a connecting rod tightener 4, and the tightener is fixed on the support rod through the handle screw on the connecting rod tightener 4. The connecting rod tightener 4 is threadedly connected with the connecting rod 16 through the handle screw 15, and each connecting rod 16 is evenly provided with a plurality of positioning holes, and the connecting rods of the two supporting rods pass through two connecting rods. The handle screw 15 of positioning hole is connected and fixed.

As shown in FIG. 2 , the supporting rod used in this embodiment is composed of an upper screw rod 5 , a lower screw rod 2 opposite to the upper screw rod 5 , and a screw sleeve 3 threadedly connected with the upper and lower screw rods. Among them, the top of the upper screw rod 5 is hinged to the bottom of the installation box 9, and the bottom of the lower screw rod 2 is hinged to the magnet 1. By rotating the screw sleeve 3, the length of the support rod can be adjusted, thereby adjusting the device to the height required for the test. and angle, after adjusting, loosen the handle screw between the connecting rod tightener 4 and the connecting rod 16, adjust the angle of the connecting rod 16 and then tighten the handle screw between the connecting rod tightener 4 and the connecting rod 16, choose two Root connecting rod 16 suitable positioning holes, the handle screw is passed through the positioning holes and tightened, and finally the angle of the support rod is fixed by connecting rod 16.

As shown in FIGS. 3 and 4 , the installation box 9 includes a top plate, a bottom plate, side plates for connecting the top plate and the bottom plate, and a door plate 21 hinged to the side plates. Both sides of installation box 9 are respectively fixed with a handle 6, and the base plate bottom of installation box 9 is hinged with two support bar tops. A displacement sensor holder 23 is fixed on the inside of the side plate of the installation box 9, and the displacement sensor 10 is fixed on the displacement sensor holder 23 by bolts. The center of the top plate and bottom plate of the installation box 9 is provided with a stepped hole, and a linear bearing 20 is arranged in the stepped hole, wherein the linear bearing 20 includes a linear bearing body 20a and a linear bearing body 20a located at the end of the linear bearing body 20a and having a diameter greater than the outer diameter of the linear bearing body 20a Bearing fixing plate 20b. The linear bearing body 20a passes through the stepped hole, and the bearing fixing plate 20b at its end cooperates with the stepped surface of the stepped hole and is fixed with bolts. A pressing hand plate 7 for applying force to the guide rod 8 is fixed on the top of the guide rod 8 , the guide rod 8 passes through the top plate and the bottom plate of the installation box 9 , and is slidably fitted with the linear bearing 20 . The surface of the guide rod 8 is provided with an anti-rotation groove 22 in the axial direction, and the inside of the door panel 21 of the installation box 9 is fixed with an anti-rotation key 19 cooperating with the anti-rotation groove 22. After the door panel 21 is closed, the anti-rotation key 19 can be embedded in the anti-rotation groove 22 Inside.

The bottom of the guide rod 8 protrudes from the bottom of the installation box 9 and is fixedly connected to the force sensor 14. The other end of the force sensor 14 is fixedly connected to the indenter rod 17. The bottom of the indenter rod 17 is fixedly connected to the loading head 18 for loading the auto parts. A data acquisition board 13 is horizontally fixed between the bottom of the guide rod 8 and the force sensor 14, and a ball joint 12 is fixed on the upper surface of the data acquisition board 13, and a transition shaft for moving sensors is threaded on the ball joint 12. 11. The measuring rod at the bottom of the displacement sensor 10 protrudes from the bottom of the installation box 9 and is threadedly connected with the top of the transition shaft 11 of the displacement sensor. Wherein, the end of the ball end of the ball joint 12 is threadedly connected with the transition shaft 11 of the displacement sensor, the fixed seat of the ball joint 12 is fixedly connected with the upper end surface of the data acquisition board 13, and the ball end of the ball joint 12 Cooperate with the ball socket of the ball joint 12 to eliminate the assembly and processing errors of the device. The displacement sensor 10 is connected to the guide rod 8 through the data acquisition board 13 (that is, it is equivalent to being connected to the indenter rod 17). During the loading process, the indenter rod 17 is displaced correspondingly as the loading point is deformed by force. . Since the displacement sensor 10 and the indenter rod 17 are connected as a whole through the data acquisition board 13, the displacement measured by the displacement sensor 10 is the deformation displacement of the loading point.

The above is only a specific embodiment of the present invention. It should be pointed out that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention shall be covered by the protection scope of the present invention. within.

Claims (11)

1. A kind of 1. portable rigid testboard bay, it is characterised in that：Passed including bracket assembly, guide rod (8), pressure head bar (17), power Sensor (14) and displacement transducer (10), the bracket assembly bottom are hinged with the magnet (1) for being fixed with ground absorption, institute State guide rod (8) to be arranged on bracket assembly and can slide axially, institute's displacement sensors (10) are fixed on bracket assembly, position The end of displacement sensor (10) measuring staff is fixedly connected with guide rod (8), and described force snesor (14) one end and guide rod (8) bottom are solid Fixed, for the other end with fixed at the top of pressure head bar (17), pressure head bar (17) bottom is fixed with loading head (18).
2. 2. portable rigid testboard bay as claimed in claim 1, it is characterised in that：Guide rod (8) bottom level is fixed There is data acquisition board (13), data acquisition board (13) upper surface passes through displacement transducer transition axis (11) and displacement transducer (10) the end thread connection of measuring staff.
3. 3. portable rigid testboard bay as claimed in claim 2, it is characterised in that：Institute's displacement sensors transition axis (11) Ball head universal (12), the bulb end of the ball head universal (12) and displacement sensing are provided between data acquisition board (13) Device transition axis (11) is threadedly coupled, and the fixed seat of the ball head universal (12) is fixed with data acquisition board (13) upper surface to be connected Connect, the bulb of the ball head universal (12) cooperates with the ball-and-socket of ball head universal (12).
4. 4. portable rigid testboard bay as claimed in claim 2, it is characterised in that：The bracket assembly includes two root long degree Adjustable support bar and the connecting rod (16) being connected with support bar, the magnet are arranged at the support bar bottom, the support bar Middle part is arranged with connecting rod fixer (4), and the connecting rod fixer (4) is threadedly coupled with connecting rod (16), on the connecting rod (16) Provided with multiple positioning holes, pass through the handle screw (15) through two connecting rod positioning holes between the connecting rod and connecting rod of two support bars It is connected.
5. 5. portable rigid testboard bay as claimed in claim 4, it is characterised in that：The support bar include upper screw rod (5), The lower screw mandrel (2) oppositely oriented with upper screw rod (5) and the screw mandrel sleeve (3) being connected with upper and lower wire rod thread, the upper screw rod (5) Top is hinged with mounting box (9) bottom, lower screw mandrel (2) bottom and magnet (1) are be hinged.
6. 6. portable rigid testboard bay as claimed in claim 4, it is characterised in that：The bracket assembly also includes mounting box (9), the mounting box (9) includes top plate, bottom plate and the side plate for connecting top plate and bottom plate, the bottom plate of the mounting box (9) Bottom is hinged with two support bars, and the side plate interior sides of the mounting box (9) are fixed with displacement transducer fixed seat (23), institute's rheme Displacement sensor (10) is fixed in displacement transducer fixed seat (23), and the measuring staff of institute's displacement sensors (10) stretches out mounting box (9) bottom, it is connected with displacement transducer transition axis (11) screw top.
7. 7. portable rigid testboard bay as claimed in claim 6, it is characterised in that：The mounting box (9) also includes door-plate (21), the door-plate (21) and the side plate of mounting box (9) are hinged, and guide rod (8) surface is provided with rotation stop groove (22), institute vertically State the rotation stop key (19) for being fixed with the inside of door-plate (21) and coordinating with rotation stop groove (22).
8. 8. portable rigid testboard bay as claimed in claim 6, it is characterised in that：The top plate of the mounting box (9) and bottom Plate center is fixed with linear bearing (20), and the guide rod (8) passes through the top plate and bottom plate of mounting box (9), and and linear bearing (20) shiding matching.
9. 9. portable rigid testboard bay as claimed in claim 8, it is characterised in that：The linear bearing (20) includes straight line Bearing body (20a) and the bearing for being more than linear bearing body (20a) external diameter positioned at linear bearing body (20a) end and diameter Fixed plate (20b), the top plate of the mounting box (9) and bottom plate center are provided with shoulder hole, and the linear bearing body (20a) passes through Shoulder hole, the bearing (setting) plate (20b) of its end cooperates with the step surface of shoulder hole, and is consolidated each other by bolt It is fixed.
10. 10. portable rigid testboard bay as claimed in claim 6, it is characterised in that：Mounting box (9) both sides are fixed with Hand-held handle (6).
11. 11. the portable rigid testboard bay as described in any one of claim 1-10, it is characterised in that：The guide rod (8) Top is fixed with for the pressing palm (7) to guide rod (8) force.