A sensor fixture for target body impact testing

Abstract

The application discloses a sensor fixing device for target body impact experiment, which comprises a mounting carrier and a plurality of telescopic rods. The mounting carrier is used for fixing the sensor and allowing the sensor to be adjusted in position in X and Y horizontal directions. The plurality of telescopic rods are arranged in the circumferential direction of the mounting carrier and are fixedly connected with the mounting carrier; the end of each telescopic rod is equipped with a lock block for firmly fixing the target body. The application can adapt to target bodies of different shapes and sizes through the cooperative design of the telescopic rods and the lock blocks. The telescopic rods can be adjusted in the circumferential direction, and the lock blocks can tightly fit the outer wall of the target body, so that stable and reliable fixing effect can be realized on the target body of plane, curved surface or conical surface.

Description

Technical Field

[0001] This invention relates to a sensor fixing device for target impact resistance testing, belonging to the field of impact dynamics testing. Background Technology

[0002] In target impact resistance testing, accurately measuring parameters such as displacement, velocity, and acceleration of the target during impact is crucial. Currently, these parameters are typically measured by vertically mounting the sensor probe on the back of the target (i.e., the side of the target that experiences impact). Existing methods mostly use welded steel frames to fix the sensor, but due to the diverse sizes and shapes of the targets, this method makes it difficult to ensure that the sensor probe remains perpendicular to the back of the target at all times, resulting in poor adaptability. Furthermore, when performing measurements at multiple locations, the installation and adjustment of the sensor on the steel frame are inconvenient. Once fixed, readjusting the position is very difficult, affecting the flexibility and accuracy of the measurement, resulting in poor overall performance. Summary of the Invention

[0003] The present invention provides a sensor fixing device for target impact resistance experiments in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this invention are as follows:

[0005] A sensor fixing device for target impact resistance testing, comprising:

[0006] The mounting carrier is used to fix the sensor, and the sensor can be adjusted in the X and Y horizontal directions on the mounting carrier.

[0007] Telescopic rods; several telescopic rods are arranged circumferentially along the mounting carrier and fixed to the mounting carrier, and a locking block is assembled at the end of each telescopic rod for fixing it to the target.

[0008] Furthermore, the mounting carrier is provided with sensor fixing holes, and the sensor is clamped and fixed in the sensor fixing holes by elastic force.

[0009] Furthermore, the structure for achieving elastic clamping of the sensor includes a mounting block, a first locking block, a second locking block, and a spring. The sensor fixing hole is located on the mounting block. The first locking block and the second locking block are slidably connected to the mounting block. The first locking block and the second locking block are pressed against the sensor by the elastic force of the two springs, and the sensor is pressed against the wall of the sensor fixing hole.

[0010] Furthermore, a first driving block and a second driving block are slidably connected to the mounting block. The first driving block and the second driving block are elastically supported on the mounting block by the springs. Sliding pins are fixed on both the first driving block and the second driving block. The first locking block and the second locking block are respectively provided with driving grooves. The two sliding pins are inserted into the corresponding driving grooves. By sliding the first driving block or the second driving block, the first locking block or the second locking block is driven accordingly.

[0011] Furthermore, the mounting block is provided with a knob and a toggle switch, an eccentric block is connected to the knob, a first drive block abuts against the eccentric block, and the toggle switch is fixed to the second drive block.

[0012] Furthermore, the mounting carrier is provided with a driving unit for driving the sensor to perform X and Y horizontal displacement. The driving unit includes a driving shaft and a mounting frame. Four driving shafts are rotatably connected to the mounting carrier in a rectangular shape. Each driving shaft is provided with a helical groove. Ball heads are provided around the mounting frame. The ball heads cooperate with the helical grooves on the corresponding side driving shafts.

[0013] Furthermore, the telescopic rod includes a telescopic sleeve, a mounting shaft, a support shaft, a rotating shaft, and a drive seat. The telescopic sleeve includes three freely telescopic sections arranged coaxially from the inside to the outside. One end of the telescopic sleeve is fixed to the mounting carrier, and the rotating shaft is rotatably connected to the mounting carrier. The drive seat drives the rotating shaft to rotate. The support shaft rotates synchronously with the rotating shaft. The support shaft is threadedly connected to the innermost freely telescopic section and drives the middle freely telescopic section to move axially synchronously. One end of the mounting shaft is threadedly connected to the rotating shaft, and the other end passes through the support shaft and the telescopic sleeve in sequence and is fixed to the locking block. The mounting shaft drives the outermost freely telescopic section to move axially synchronously.

[0014] Furthermore, the mounting shaft is provided with a first slot for engaging the outermost free telescopic section of the telescopic sleeve; the support shaft is provided with a second slot for engaging the free telescopic section in the middle position.

[0015] Furthermore, the drive seat drives the rotating shaft to rotate via a planetary gear train; the planetary gear train includes a planet carrier, planet gears and a sun gear, and the telescopic sleeve is fixed to the mounting carrier by several pins. With three of the pins as the rotation centers, the planet gears and the sun gear are rotated on the corresponding pins. The inner ring of the planet carrier meshes with the sun gear, the outer ring meshes with the drive seat, and the sun gear is fixed to the rotating shaft.

[0016] Furthermore, the locking block is hinged to the end of the telescopic rod, and a locking bolt is provided at the hinge point; the clamping surface of the locking block is provided with anti-slip teeth.

[0017] The present invention has the following beneficial effects:

[0018] (1) The present invention can adapt to targets of different shapes and sizes through the coordinated design of telescopic rods and locking blocks. The telescopic rods can be arranged and adjusted along the circumference of the mounting carrier, while the locking blocks can fit tightly against the outer wall of the target, achieving a stable and reliable fixing effect regardless of whether it is a plane, curved surface or conical surface.

[0019] (2) In the traditional steel frame fixing method, once the position of the sensor is fixed, it is very difficult to adjust, which cannot meet the needs of multi-position measurement. The sensor of the present invention can be adjusted in the X and Y horizontal directions on the mounting carrier. The sensor can be moved flexibly through the drive unit, and can be quickly adjusted to the required measurement position, which greatly improves the flexibility and efficiency of measurement.

[0020] (3) The sensor of the present invention is clamped and fixed in the sensor fixing hole by elastic force. The sensor can be installed and disassembled quickly by operating the knob and the toggle knob without the need for tools, which greatly improves the efficiency of installation and disassembly. In addition, the fixing method of the present invention ensures that the sensor probe is perpendicular to the target being measured.

[0021] (4) The drive unit design of this invention allows for precise position adjustment of the sensor in the X and Y horizontal directions. By rotating the drive shaft, the mounting bracket can move along the helical groove to achieve precise position adjustment of the sensor. This design makes the sensor position adjustment more flexible and can quickly adapt to different measurement needs.

[0022] (5) The telescopic rod of the present invention adopts a multi-support point design, which ensures the stability of the telescopic rod during the extension and retraction process through the dual support of the rotating shaft and the support shaft. Even under impact, the telescopic rod can remain stable, ensuring the accuracy of the measurement. Attached Figure Description

[0023] Figure 1 This is a schematic diagram illustrating the application of the present invention.

[0024] Figure 2 This is a structural diagram of the present invention.

[0025] Figure 3 This is a diagram of an elastic clamping structure used to fix the sensor.

[0026] Figure 4 for Figure 3 An internal diagram.

[0027] Figure 5 for Figure 3 Cross-sectional view.

[0028] Figure 6 This is a diagram showing the sensor mounted on the mounting carrier.

[0029] Figure 7This is a structural diagram of the driving unit.

[0030] Figure 8 This is a sectional view of the telescopic pole.

[0031] Figure 9 This is an exploded view of the telescopic pole.

[0032] Figure 10 middle:

[0033] (a) The figure shows the state when the mounting shaft is not extended and is supported by two support points, A and B;

[0034] (b) The figure shows the state after the mounting shaft extends, supported by two support points, A and B;

[0035] (c) The figure shows the state of the shaft being supported by support point A after the shaft is extended without a support shaft.

[0036] Figure 11 This is the assembly drawing of the lock block.

[0037] in:

[0038] 1. Mounting carrier; 10. Sensor; 11. Drive unit; 111. Drive shaft; 112. Mounting bracket;

[0039] 12. Mounting block; 120. Sensor mounting hole; 121. Knob; 122. Toggle knob; 123. Eccentric block;

[0040] 13. First locking block; 14. Second locking block; 15. Spring; 16. First driving block; 17. Second driving block; 18. Sliding pin;

[0041] 2. Telescopic rod; 21. Telescopic sleeve; 22. Mounting shaft; 221. First slot; 23. Support shaft; 231. Second slot; 24. Rotating shaft; 25. Drive seat;

[0042] 3. Lock block;

[0043] 41. Planet carrier; 42. Planet gears; 43. Sun gear; 44. Pin;

[0044] 5. Target. Detailed Implementation

[0045] The invention will now be further described with reference to the accompanying drawings.

[0046] like Figure 1 and Figure 2This invention discloses a sensor fixing device for a target impact resistance test, comprising a mounting carrier 1 and telescopic rods 2. The mounting carrier 1 is used to fix a sensor 10, and the sensor 10 can be adjusted in the X and Y horizontal directions on the mounting carrier 1. Four telescopic rods 2 are respectively fixed around the mounting carrier 1, and a locking block 3 is assembled at the end of each telescopic rod 2 for fixing to the target 5.

[0047] Since the sensor needs to be replaced frequently, a sensor fixing hole 120 is provided on the mounting carrier 1 for convenient and quick installation and removal of the sensor. The sensor 10 is clamped and fixed in the sensor fixing hole 120 by elastic force.

[0048] like Figure 3 The structure for elastically clamping the sensor 10 includes a mounting block 12, a first locking block 13, a second locking block 14, and a spring 15. The sensor fixing hole 120 is provided on the mounting block 12. The first locking block 13 and the second locking block 14 are slidably connected to the mounting block 12, and the first locking block 13 and the second locking block 14 are elastically pressed against the sensor 10 by the elastic force of the two springs 15, and the sensor 10 is pressed against the hole wall of the sensor fixing hole.

[0049] When fixing the sensor 10, first move the first locking block 13 and the second locking block 14 so that the first locking block 13 and the second locking block 14 move in a direction away from the center of the sensor fixing hole 120. Then insert the sensor 10 into the sensor fixing hole 120 and then release the first locking block 13 and the second locking block 14.

[0050] like Figure 4 and Figure 5 To facilitate the movement of the first locking block 13 and the second locking block 14, a first driving block 16 and a second driving block 17 are slidably connected to the mounting block 12. Both the first driving block 16 and the second driving block 17 have blind holes, and a spring 15 is installed in each blind hole. The first driving block 16 and the second driving block 17 are elastically supported on the mounting block 12 by their respective springs 15. Sliding pins 18 are fixed to both the first driving block 16 and the second driving block 17, respectively, perpendicular to each other. Driving grooves are provided on the first locking block 13 and the second locking block 14, and the two sliding pins 18 are inserted into their corresponding driving grooves. By sliding the first driving block 16 or the second driving block 17, the corresponding sliding pins 18 are linked with the grooves, thereby driving the first locking block 13 or the second locking block 14 accordingly.

[0051] The first drive block 16 and the second drive block 17 are driven manually. A knob 121 and a toggle switch 122 are provided on the mounting block 12. An eccentric block 123 is connected to the knob 121. Under the action of a spring force, the first drive block 16 abuts against the eccentric block 123. A waist-shaped groove is provided on the mounting block 12, and the toggle switch 122 is slidably connected within the waist-shaped groove and fixed to the second drive block 17.

[0052] Turning knob 121 causes eccentric block 123 to push first drive block 16 against spring force (the corresponding spring is compressed), and first locking block 13 moves away from the center of sensor mounting hole 120. Releasing knob 121 causes the corresponding spring to rebound and abut against first drive block 16, subsequently driving first locking block 13 towards the center of sensor mounting hole 120. Movement of second drive block 17 is achieved directly by turning knob 122.

[0053] like Figure 6 and Figure 7 The mounting carrier 1 has a rectangular frame structure. A drive unit 11 for driving the sensor 10 to perform horizontal X and Y displacements is provided on the mounting carrier 1. The drive unit 11 includes drive shafts 111 and mounting brackets 112. Four drive shafts 111 are rotatably connected to the four sides of the mounting carrier 1. Each drive shaft 111 has a helical groove. The inner walls of the mounting carrier 1 have sliding grooves. Ball heads are provided around the mounting brackets 112. The ball heads extend into the sliding grooves and cooperate with the helical grooves on the corresponding drive shafts 111. The mounting block 12 is fixed on the mounting brackets 112. A knob is provided at both ends of each drive shaft 111. When the position of the sensor 10 needs to be adjusted, it is adjusted by rotating the drive shaft 111.

[0054] like Figure 8 and Figure 9 The telescopic rod 2 in this invention includes a telescopic sleeve 21, a mounting shaft 22, a support shaft 23, a rotating shaft 24, and a drive seat 25 arranged coaxially. The telescopic sleeve 21 includes three free telescopic sections arranged coaxially from the inside to the outside, wherein the three free telescopic sections cooperate with each other through a keyway structure (that is, each free telescopic section can only move axially and cannot rotate circumferentially). The innermost free telescopic section is fixed to the mounting carrier 1.

[0055] The rotating shaft 24 is rotatably connected to the mounting carrier 1, and the drive seat 25 is used to drive the rotating shaft 24 to rotate. The support shaft 23 rotates synchronously with the rotating shaft 24, and the support shaft 23 is threadedly connected to the innermost free telescopic section. The axial displacement of the support shaft 23 drives the free telescopic section in the middle position to move axially synchronously.

[0056] One end of the mounting shaft 22 is threaded into the rotating shaft 24, and the other end passes through the support shaft 23 and the outermost free telescopic section in sequence and is fixed to the locking block 3 on the outside of the telescopic sleeve 21. The mounting shaft 22 drives the outermost free telescopic section to move axially synchronously.

[0057] The support shaft 23 and the rotating shaft 24 rotate synchronously. They are connected by a key and keyway (or a spline structure). Both the support shaft 23 and the rotating shaft 24 have stepped ends. Correspondingly, the rotating shaft 24 has stepped surfaces on the inner wall of the port of the innermost free extension section. Through the interaction of the stepped ends and the stepped surfaces, the maximum axial displacement limit of the mounting shaft 22 and the support shaft 23 is achieved.

[0058] In order to enable the mounting shaft 22 to drive the outermost free telescopic section to move synchronously axially, a first slot 221 is provided on the mounting shaft 22. The opening of the outermost free telescopic section is retracted and locked in the first slot 221, and is in clearance fit with the first slot 221.

[0059] To enable the support shaft 23 to drive the free telescopic section in the middle position to move axially synchronously, a second slot 231 is provided on the support shaft 23. The opening of the free telescopic section in the middle retracts and is locked in the second slot 231, and is in clearance fit with the second slot 231.

[0060] In this invention, the drive seat 25 drives the rotating shaft 24 to rotate via a planetary gear train. The planetary gear train includes a planet carrier 41, planetary gears 42, and a sun gear 43. The telescopic sleeve 21 is fixed to the mounting carrier 1 by several pins 44. With three of the pins 44 as the rotation centers, the planetary gears 42 and the sun gear 43 are rotated on the corresponding pins 44. The inner ring of the planet carrier 41 meshes with the sun gear 43, and the outer ring meshes with the drive seat 25. The sun gear 43 is fixed to the rotating shaft 24.

[0061] The advantage of this invention, which sets the mounting shaft 22 and the support shaft 23 to extend synchronously, is that, since it is used in an impact scenario, the stability of the mounting shaft 22 must be guaranteed during the later stages of extension and retraction. The longer the rod extends, the lower its stability becomes. The support shaft 23 primarily serves to support the mounting shaft 22. Combined with... Figure 10 In the structural assembly, the mounting shaft 22 has two support points, namely Figure 10 Support points A and B are provided by the rotating shaft 24 to the mounting shaft 22, and support point B is provided by the support shaft 23 to the mounting shaft 22.

[0062] Figure 10Figure (a) shows the initial state, and Figure (b) shows the state after the mounting shaft 22 extends. As can be seen from Figures (a) and (b), after the mounting shaft 22 extends, the support point B moves axially along with it, which greatly ensures the stability of the mounting shaft 22. Figure (c) is a schematic diagram without the support shaft 23, that is, without the support point B. As can be seen from Figure (c), without the support point B, the extended part of the mounting shaft 22 has poor stability after the mounting shaft 22 is extended, especially the end of the mounting shaft 22 is also subjected to impact.

[0063] like Figure 11 A hinge lug is provided at the end of the mounting shaft 22, and the locking block 3 is hinged to the hinge lug. The hinge shaft is fixed by a locking bolt. When fixing, after adjusting the telescopic rod 2 to the required length, adjust the locking block 3 to a suitable angle and fit it against the outer wall of the target body 5, and then lock the locking block 3. To further ensure the locking effect, after locking the locking block 3, the drive seat 25 can be rotated in the opposite direction to retract the telescopic rod 2. The clamping surface of the locking block 3 is provided with an anti-slip tooth surface to improve the fastening effect.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be considered within the scope of protection of the present invention.

Claims

1. A sensor fixing device for target impact resistance testing, characterized in that: include: Mounting carrier (1), the mounting carrier (1) is used to fix sensor (10), and the sensor (10) can be adjusted in the X and Y horizontal directions on the mounting carrier (1); Telescopic rod (2); Several telescopic rods (2) are arranged circumferentially along the mounting carrier and fixed to the mounting carrier (1), and a locking block (3) is assembled at the end of each telescopic rod (2) for fixing to the target; The mounting carrier (1) is provided with a sensor fixing hole (120), and the sensor (10) is clamped and fixed in the sensor fixing hole (120) by elastic force; The structure for achieving elastic clamping of the sensor (10) includes a mounting block (12), a first locking block (13), a second locking block (14), and a spring (15). The sensor fixing hole (120) is located on the mounting block (12). The first locking block (13) and the second locking block (14) are slidably connected on the mounting block (12). The first locking block (13) and the second locking block (14) are pressed against the sensor (10) by the elastic force of the two springs (15), and the sensor (10) is pressed against the hole wall of the sensor fixing hole. The mounting carrier (1) is provided with a drive unit (11) for driving the sensor (10) to perform horizontal displacement in X and Y. The drive unit (11) includes a drive shaft (111) and a mounting frame (112). Four drive shafts (111) are rotatably connected to the mounting carrier (1) in a rectangular shape. Each drive shaft (111) is provided with a spiral groove. The mounting frame (112) is provided with ball heads around its perimeter. The ball heads cooperate with the spiral grooves on the corresponding side drive shafts (111). The telescopic rod (2) includes a telescopic sleeve (21), a mounting shaft (22), a support shaft (23), a rotating shaft (24), and a drive seat (25). The telescopic sleeve (21) includes three free telescopic sections arranged coaxially from the inside to the outside. One end of the telescopic sleeve (21) is fixed to the mounting carrier (1), and the rotating shaft (24) is rotatably connected to the mounting carrier (1). The drive seat (25) drives the rotating shaft (24) to rotate. The support shaft (23) rotates synchronously with the rotating shaft (24). The support shaft (23) is threadedly connected to the innermost free telescopic section and drives the free telescopic section in the middle position to move axially synchronously. One end of the mounting shaft (22) is threadedly connected to the rotating shaft (24), and the other end passes through the support shaft (23) and the telescopic sleeve (21) in sequence and is fixed to the locking block (3). The mounting shaft (22) drives the outermost free telescopic section to move axially synchronously.

2. The sensor fixing device for target impact resistance testing as described in claim 1, characterized in that: The mounting block (12) is also slidably connected to a first driving block (16) and a second driving block (17). The first driving block (16) and the second driving block (17) are elastically supported on the mounting block (12) by the spring (15). Sliding pins (18) are fixed on the first driving block (16) and the second driving block (17). The first locking block (13) and the second locking block (14) are respectively provided with driving grooves. The two sliding pins (18) are inserted into the corresponding driving grooves. By sliding the first driving block (16) or the second driving block (17), the first locking block (13) or the second locking block (14) is driven accordingly.

3. The sensor fixing device for target impact resistance testing as described in claim 2, characterized in that: The mounting block (12) is provided with a knob (121) and a toggle (122). An eccentric block (123) is connected to the knob (121). The first drive block (16) abuts against the eccentric block (123). The toggle (122) is fixed to the second drive block (17).

4. The sensor fixing device for target impact resistance testing as described in claim 1, characterized in that: The mounting shaft (22) is provided with a first slot (221) for locking the outermost free telescopic section of the telescopic sleeve; the support shaft (23) is provided with a second slot (231) for locking the free telescopic section in the middle position.

5. The sensor fixing device for target impact resistance testing as described in claim 1, characterized in that: The drive seat (25) drives the rotating shaft (24) to rotate through the planetary gear system; the planetary gear system includes a planet carrier (41), planetary gears (42) and a sun gear (43). The telescopic sleeve (21) is fixed on the mounting carrier (1) by several pins (44). With three of the pins (44) as the rotation center, the planetary gears (42) and the sun gear (43) are rotated on the corresponding pins (44). The inner ring of the planet carrier (41) meshes with the sun gear (43), and the outer ring meshes with the drive seat (25). The sun gear (43) is fixed to the rotating shaft (24).

6. The sensor fixing device for target impact resistance testing as described in claim 1, characterized in that: The locking block (3) is hinged to the end of the telescopic rod (2), and a locking bolt is provided at the hinge point; the clamping surface of the locking block (3) is provided with anti-slip teeth.

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