Physical tension testing device

Abstract

The utility model discloses a tension testing device for physics, which relates to the technical field of teaching aids and specifically comprises a shell, a perspective plate is clamped on the front surface of the shell, two ends of the back surface of the shell are connected with supporting rollers through telescopic rods, a device inner core is arranged in the middle of an inner cavity of the shell, an empty groove is formed in the middle of the device inner core, and a clamping groove is formed in the middle of the empty groove. The middle of the empty groove is connected with a pull rod through a spring, the other end of the pull rod penetrates through the shell and is fixedly provided with a hook, the pull rod is movably connected with the shell, the top of the pull rod is fixedly connected with a fixing block, and the middle of the side, close to the perspective plate, of the fixing block is fixedly connected with a pointer. According to the physical tension testing device, the device can be supported by using the supporting rollers, so that when a user performs physical horizontal tension experiment demonstration, the device can move horizontally, the use reliability of the device is improved, the distance between the supporting rollers and the shell can be changed, and the adaptability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids technology, specifically a physics tensile testing device. Background Technology

[0002] In physics teaching, tensile testing devices are often used to measure the magnitude of tensile force. Demonstrations and experiments can enhance students' interest in physical phenomena, cultivate their observation skills, and strengthen their hands-on experimental abilities.

[0003] Spring force gauges are commonly used force testing devices in existing physics teaching experiments. However, because the scale lines of existing spring force gauges are usually located behind the pointer and are densely packed, it is necessary to keep the line of sight parallel to the pointer when taking the reading. In actual operation, users can only roughly estimate the position of the line of sight and cannot ensure that the line of sight and the pointer are completely parallel, which affects the accuracy of the reading. Furthermore, when the spring force gauge pulls an object on a table, it is difficult to keep the spring force gauge moving horizontally. Based on this, this application proposes a force testing device for physics. Utility Model Content

[0004] This invention provides a physical tensile testing device, which solves the problems mentioned in the background art, such as the need for the line of sight and pointer to be horizontal when using the existing spring force gauge, which makes it inconvenient to read the value, and the difficulty of keeping the spring force gauge horizontal when pulling an object on a table.

[0005] This utility model provides the following technical solution: a physical tensile testing device, including a housing, a viewing plate snapped onto the front of the housing, and support rollers connected to both ends of the back of the housing via telescopic rods. A device core is located in the middle of the inner cavity of the housing, and a slot is located in the middle of the inner core. A pull rod is connected to the middle of the slot via a spring. The other end of the pull rod passes through the housing and is fixed with a hook. The pull rod is movably connected to the housing. A fixing block is fixedly connected to the top of the pull rod. A pointer is fixedly connected to the middle of the fixing block near the viewing plate. The pointer is movably connected to the device core. A first conductive wire is fixedly connected to the middle of one side of the fixing block, and two second conductive wires are fixedly connected to the middle of the other side of the fixing block. A first and second set of transmission wires adapted to the first conductive wire are provided on both sides of the inner cavity of the slot.

[0006] The device has slots at both ends near the viewing plate on its inner core. A third set of transmission wires is fixedly connected to one side of the slot. Both the first and second sets of transmission wires are electrically connected to the third set of transmission wires. A scale plate is fitted into the inner cavity of the slot. One side of the scale plate has scale lines. A heating strip assembly is evenly fixedly connected to one side of the scale plate. The heating strip assembly is compatible with the third set of transmission wires. A heat insulation plate is fixedly connected to the other side of the scale plate. Heat-conducting strips are evenly embedded in the heat insulation plate. The inner side of the heat-conducting strips contacts the heating strips in the heating strip assembly. The outer side of the heat-conducting strips has scale lines written with temperature-sensitive ink.

[0007] Preferably, a pull ring is fixedly connected to the middle of the top of the housing, and a power source is attached to the outside of the housing. The power source is electrically connected to both conductive wire one and conductive wire two.

[0008] Preferably, the distance between the two conductive wires is the same as the outer diameter of the conductive wire, and the height of the conductive wire is the same as the distance between two adjacent transmission wires in the transmission wire group.

[0009] Preferably, handles are fixedly connected to both sides of the bottom end of the scale plate, and the handles are L-shaped; the length of the heating strip in the heating strip group is less than the width of the scale plate, and the distance between two adjacent heating strips is the same as the distance between two adjacent transmission wires in the transmission wire group one.

[0010] Preferably, the pointer has a T-shaped structure, with the horizontal end of the pointer contacting the side of the inner core of the device near the viewing plate, the vertical end of the pointer being fixedly connected to the fixing block, and the inner core of the device having a slot on the side near the viewing plate, with the vertical end of the pointer being movably connected to the slot.

[0011] Preferably, the distance between any two adjacent transmission wires in the three transmission wire groups (group 1, group 2, and group 3) is the same.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This physical tensile testing device utilizes support rollers to support the device, allowing it to move horizontally during physical horizontal tensile tests, thus improving the reliability of the device. Furthermore, the distance between the support rollers and the housing can be changed, enhancing the adaptability of the device.

[0014] 2. This physical tensile testing device, through the setting of the scale plate, when the heat insulation plate is located on the side of the scale plate close to the viewing plate, when the pointer is stable, the corresponding scale line on the heat insulation plate can change color due to temperature change, which is convenient for users to read and reduces errors. The device has multiple usage methods, which improves the practicality of the device. Attached Figure Description

[0015] Figure 1 This is a front view of the structure of this utility model;

[0016] Figure 2 The structure of this utility model Figure 1 Rear view illustration;

[0017] Figure 3 The structure of this utility model Figure 2 Cross-sectional view;

[0018] Figure 4 The structure of this utility model Figure 1 Cross-sectional view;

[0019] Figure 5 The structure of this utility model Figure 4 Explosion diagram;

[0020] Figure 6 This is a schematic diagram of the tie rod structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the back of the scale plate of this utility model.

[0022] In the diagram: 1. Shell; 2. Transparent panel; 3. Pull ring; 4. Pull rod; 5. Support roller; 6. Telescopic rod; 7. Hollow groove; 8. Transmission wire group one; 9. Transmission wire group two; 10. Spring; 11. Pointer; 12. Heat insulation plate; 13. Handle; 14. Device core; 15. Transmission wire group three; 16. Scale plate; 17. Heating strip group; 18. Scale lines; 19. Fixing block; 20. Conductive wire two; 21. Conductive wire one. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This utility model provides a tensile testing device for physics, including a housing 1. A transparent plate 2 is snapped onto the front of the housing 1. The transparent plate 2 can be made of glass. Both ends of the back of the housing 1 are connected to support rollers 5 via telescopic rods 6. By setting the telescopic rods 6, the distance between the support rollers 5 and the housing 1 can be changed. When the device is used to pull an object horizontally, the support rollers 5 can support the device and limit the height of the device, so that the device can move horizontally and improve the convenience of using the device.

[0025] The telescopic rod 6 is prior art. In some embodiments of this application, the telescopic principle of the telescopic rod 6 is the same as that of the telescopic rod disclosed in the authorized patent document with application number CN202121237853.9.

[0026] A pull ring 3 is fixedly connected to the middle of the top of the housing 1, and the user can pull the device to move it by pulling the pull ring 3.

[0027] The inner core 14 of the device is located in the middle of the inner cavity of the housing 1. The inner core 14 has a slot 7 in the middle. A pull rod 4 is connected to the middle of the slot 7 by a spring 10. The bottom of the pull rod 4 passes through the housing 1 and is fixed with a hook. The pull rod 4 is movably connected to the housing 1. A fixing block 19 is fixedly connected to the top of the pull rod 4. A pointer 11 is fixedly connected to the middle of the fixing block 19 near the transparent plate 2. The pointer 11 has a T-shaped structure. The horizontal end of the pointer 11 contacts the inner core 14 near the transparent plate 2. The vertical end of the pointer 11 is fixedly connected to the fixing block 19. The inner core 14 near the transparent plate 2 has a slot. The vertical end of the pointer 11 is movably connected to the slot. With the arrangement of the spring 10, the pull rod 4 and the hook, when the device is in use, the weight of the object itself can apply a pulling force to the pull rod 4 through the hook. The pull rod 4 can extend the spring 10, and the movement of the pull rod 4 can drive the pointer 11 to move.

[0028] A conductive wire 21 is fixedly connected to the middle of one side of the fixing block 19, and two conductive wires 20 are fixedly connected to the middle of the other side of the fixing block 19. The two conductive wires 20 are vertically distributed. A power source (not shown in the figure) is attached to the outside of the housing 1. The power source is electrically connected to both conductive wire 21 and conductive wire 20. The power source can be a lithium battery. The position of the power source can be set according to the requirements and is not limited here.

[0029] Both sides of the inner cavity of the slot 7 are provided with a first set of transmission wires 8 and a second set of transmission wires 9 adapted to the first set of transmission wires 21. The fixing block 19 is in contact with the inner wall of the slot 7, and the distance between the two second sets of transmission wires 20 is the same as the outer diameter of the first set of transmission wires 21. The height of the second set of transmission wires 20 is the same as the distance between two adjacent transmission wires in the first set of transmission wires 8. The distance between two adjacent transmission wires in both the first set of transmission wires 8 and the second set of transmission wires 9 is the same. When the first set of transmission wires 21 is in contact with the transmission wires in the second set of transmission wires 9, the second set of transmission wires 20 is separated from the transmission wires in the first set of transmission wires 8. When the first set of transmission wires 21 is misaligned with the transmission wires in the second set of transmission wires 9, the second set of transmission wires 20 is in contact with the transmission wires in the first set of transmission wires 8.

[0030] The inner core 14 of the device has slots at both ends near the transparent plate 2. A transmission wire group 3 15 is fixedly connected to one side of the slot. Transmission wire group 1 8 and transmission wire group 2 9 are electrically connected to transmission wire group 3 15. A scale plate 16 is snapped into the inner cavity of the slot. A handle 13 is fixedly connected to both sides of the bottom end of the scale plate 16. The handle 13 has an L-shaped structure. The scale plate 16 can be quickly disassembled and assembled through the handle 13.

[0031] The scale plate 16 has scale lines 18 on one side, and heating strips 17 are uniformly fixedly connected to one side of the scale plate 16. Heating strips 17 are adapted to the transmission wire group 3 15. The heat insulation plate 12 is fixedly connected to the other side of the scale plate 16. Heat-conducting strips are uniformly embedded on the heat insulation plate 12. The inner side of the heat-conducting strips is in contact with the heating strips in the heating strips 17. The outer side of the heat-conducting strips is written with scale lines using temperature-sensitive ink. When the heat insulation plate 12 is located on the side of the scale plate 16 close to the transparent plate 2, the heating strips in the heating strips 17 are in contact with the transmission wires in the transmission wire group 3 15. The length of the heating strips in the heating strips 17 is less than the width of the scale plate 16. The length of the heating strips can be set according to requirements and is not limited here. The distance between two adjacent heating strips is the same as the distance between two adjacent transmission wires in the transmission wire group 1 8. The distance between two adjacent transmission wires in the transmission wire group 1 8, transmission wire group 2 9 and transmission wire group 3 15 is the same.

[0032] As described above, when the first conductive wire 21 comes into contact with the transmission wire in the second transmission wire group 9, the pointer points to the scale line. The current can be transferred to the heating strip through the first conductive wire 21, the transmission wire in the second transmission wire group 9, and the transmission wire in the third transmission wire group 15. The heat emitted by the heating strip when it is energized can be transferred to the scale line through the heat conduction strip. The scale line changes color after heating up, and the user can see the scale indicated by the pointer. Only one scale line on the heat insulation plate 12 changes color to avoid reading errors.

[0033] When the second conductive wire 20 comes into contact with the transmission wire in the first transmission wire group 8, the pointer is located between the two scale lines. The current can be transferred to the heating strip through the second conductive wire 20, the transmission wire in the first transmission wire group 8, and the transmission wire in the third transmission wire group 15. The heat emitted by the heating strip when it is energized can be transferred to the scale lines through the heat conduction strip. The scale lines change color after heating up. At this time, two scale lines on the heat insulation plate 12 change color, and the pointer 11 is located between the two scale lines, which can also avoid reading errors.

[0034] In some embodiments of this application, the heat insulation plate 12 may be made of ceramic, and the heat-conducting strip may be made of thermally conductive graphene.

[0035] Furthermore, when the scale line 18 is located on the side of the scale plate 16 close to the transparent plate 2, the heating bar is separated from the transmission wire in the transmission wire group 3 15. When the user reads the value, he / she needs to make his / her line of sight parallel to the pointer 11. That is, the device has multiple ways of use, which improves the functionality of the device.

[0036] All electrical components involved in this application are prior art. Those skilled in the art understand their connection methods. With the help of those skilled in the art, all electrical components in this application and their compatible power supplies can be connected by wires. According to the actual situation, a suitable controller can be selected to meet the control requirements. For specific connections and control sequences, please refer to the description below. The electrical connection between each electrical component is completed in the order of operation. The detailed connection methods are well known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control.

[0037] In summary, when using this physical tensile testing device, the user can support the device using the support rollers 5, allowing the device to move horizontally during physical horizontal tensile force experiments, thus improving the reliability of the device. Furthermore, when the heat insulation plate 12 is located on the side of the scale plate 16 closest to the viewing plate 2, and the pointer 11 is stable, the corresponding scale line on the heat insulation plate 12 will change color due to temperature changes, facilitating user reading and reducing errors.

[0038] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A physical tensile testing device comprising a housing (1), characterized in that: The front of the shell (1) is clamped with a perspective board (2), both ends of the back of the shell (1) are connected with support rollers (5) through telescopic rods (6), the middle part of the inner cavity of the shell (1) is provided with a device inner core (14), the middle part of the device inner core (14) is provided with a hollow groove (7), the middle part of the hollow groove (7) is connected with a pull rod (4) through a spring (10), the other end of the pull rod (4) penetrates the shell (1) and is fixed with a hook, the pull rod (4) is movably connected with the shell (1), the top of the pull rod (4) is fixedly connected with a fixed block (19), the middle part of the fixed block (19) close to the perspective board (2) side is fixedly connected with a pointer (11), the pointer (11) is movably connected with the device inner core (14), the middle part of the fixed block (19) side is fixedly connected with a conductive wire one (21), the middle part of the other side of the fixed block (19) is fixedly connected with two conductive wire twos (20), both sides of the inner cavity of the hollow groove (7) are provided with a transmission wire group one (8) and a transmission wire group two (9) matched with the conductive wire one (21). The both ends of the device inner core (14) close to the perspective board (2) side are provided with clamping grooves, one side of the clamping groove is fixedly connected with a transmission wire group three (15), the transmission wire group one (8) and the transmission wire group two (9) are electrically connected with the transmission wire group three (15), the inner cavity of the clamping groove is clamped with a scale board (16), one side of the scale board (16) is provided with scale lines (18), one side of the scale board (16) is uniformly fixedly connected with a heating strip group (17), the heating strip group (17) is matched with the transmission wire group three (15), the other side of the scale board (16) is fixedly connected with a heat insulation board (12), the heat insulation board (12) is uniformly embedded with heat conducting strips, the inner side of the heat conducting strip is in contact with the heating strip in the heating strip group (17), the outer side of the heat conducting strip is written with scale lines by using temperature sensitive ink.

2. A tensile testing apparatus for physical use according to claim 1, characterized in that: The middle part of the top of the shell (1) is fixedly connected with a pull ring (3), the outside of the shell (1) is placed on a power supply, the power supply is electrically connected with the conductive wire one (21) and the conductive wire two (20).

3. A tensile testing apparatus for physical use according to claim 1, characterized in that: The distance between the two conductive wire twos (20) is the same as the outer diameter of the conductive wire one (21), the height value of the conductive wire two (20) is the same as the distance value between the two adjacent transmission wires in the transmission wire group one (8).

4. The tensile testing device of claim 1, wherein: The both sides of the bottom end of the scale board (16) are fixedly connected with handles (13), the handle (13) is L-shaped structure; the length value of the heating strip in the heating strip group (17) is less than the width value of the scale board (16), the distance value between the two adjacent heating strips is the same as the distance value between the two adjacent transmission wires in the transmission wire group one (8).

5. The tensile testing device of claim 1, wherein: The pointer (11) is T-shaped structure, the horizontal end of the pointer (11) is in contact with the side of the device inner core (14) close to the perspective board (2), the vertical end of the pointer (11) is fixedly connected with the fixed block (19), and the side of the device inner core (14) close to the perspective board (2) is provided with a slot, the vertical end of the pointer (11) is movably connected with the slot.

6. The tensile testing device of claim 1, wherein: The distance between two adjacent transmission lines in the transmission line group one (8), the transmission line group two (9) and the transmission line group three (15) is the same. The distance between two adjacent transmission lines in the transmission line group one (8), the transmission line group two (9) and the transmission line group three (15) is the same.

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