Impact overload indicator

Abstract

The utility model relates to an impact overload indicator, which belongs to the technical field of load indicators and comprises a main body structure, a permanent magnet structure and an anti-return mechanism, the permanent magnet structure and the anti-return mechanism are arranged in the main body structure, and a window is arranged at the top of the main body structure to observe the inside; the permanent magnet structure comprises a stressed magnet which slides along the radial direction of the main body structure and two groups of magnet pairs which are symmetrically arranged on two sides of the stressed magnet and are not equidistant; the permanent magnet structure is arranged between the window and the magnet pair closest to the window and used for limiting reverse movement of the stressed magnet, and after the stressed magnet bears the acting force of the magnet pair and slides forwards to exceed the anti-return mechanism, the red warning mark on the top of the sliding block can be observed through the window. When in use, the main body structure is vertically or horizontally mounted so as to detect impact in the horizontal direction or the vertical direction. The core of the impact overload indicator is that the function of the impact overload indicator is realized through the interaction of magnetic fields of the permanent magnets, and compared with a traditional impact overload indicator, the impact overload indicator effectively weakens precision reduction caused by abrasion.

Description

Technical Field

[0001] The utility model belongs to the technical field of load indicators, and in particular relates to an impact overload indicator. The impact overload indicator is a permanent magnet structure and is used for detecting transitional impact and vibration during transportation. Background Art

[0002] In production and life, the transportation of goods is indispensable. During transportation, goods will be subjected to various shocks and vibrations due to bumps, rough loading and unloading, etc. Excessive vibrations will cause varying degrees of damage to the goods. If the damage to the goods cannot be discovered in time, the loss of goods circulation will increase. The impact overload indicator is a low-cost, reliable mechanical device installed on the cargo packaging to detect whether it is subjected to excessive impact during transportation. If the impact overload indicator is found to be triggered during loading and unloading of goods, the equipment should be carefully checked for damage.

[0003] However, after multiple shocks and vibrations, the existing shock overload indicators may lose accuracy due to wear and other problems. Utility Model Content

[0004] Aiming at the deficiencies in the prior art, the utility model provides an impact overload indicator.

[0005] An impact overload indicator comprises a main structure, a permanent magnetic structure and an anti-return mechanism arranged in the main structure, wherein a window is arranged on the top of the main structure for observing the interior; the permanent magnetic structure comprises a force-bearing magnet sliding radially along the main structure and two groups of magnet pairs symmetrically arranged on both sides thereof with unequal distances; the permanent magnetic structure is arranged between the window and the magnet pair closest thereto, and is used for limiting the reverse movement of the force-bearing magnet; after the force-bearing magnet is subjected to the force of the magnet pair and slides forward to exceed the anti-return mechanism, a red warning mark on the top of the slider can be observed through the window; when in use, the main structure is installed vertically or horizontally to detect impacts in the horizontal or vertical direction; when installed horizontally, the group of close-distance magnet pairs with close distances between the two magnets is located at the top.

[0006] The main structure comprises a main body, which is a multi-diameter cylindrical body and comprises an upper and a lower part, wherein a partition is provided between the two parts so as to prevent the two parts from being communicated with each other.

[0007] A bottom plate is connected to the lower part of the main body, and the bottom plate is connected to the main body by screws; through holes are arranged at the four corners of the bottom plate, and the bottom plate can be connected to the outer packaging of the goods by bolts.

[0008] The permanent magnet structure includes a linear guide rail, which is fixed at a center groove opened in the center of the main body and radially opened on the partition. The linear guide rail is arranged perpendicular to the axis of the main body, and the end of the linear guide rail corresponds to the window; the slider is slidably connected to the linear guide rail, and the force magnet is installed on the slider; a warning sign is fixed on the upper end of the slider.

[0009] The central groove is a rectangular groove.

[0010] The two groups of unequally spaced magnet pairs include a close-distance magnet pair and a long-distance magnet pair, which are placed in a fixing groove provided on the main body partition and fixed to the main body by a magnet hoop; wherein the group of close-distance magnet pairs with a close distance between the two magnets is closer to the window side; the magnet pairs have the same magnetic polarity as the opposite side of the force-bearing magnet.

[0011] The main body is provided with a front end small hole corresponding to the sliding direction of the slider.

[0012] The anti-return mechanism includes a push rod, a push block, a telescopic block, a clip, a spring I and a spring support plate. The telescopic block is provided with a circular groove matching the spring I. One end of the spring I is installed in the circular groove, and the other end is fixed to the fixed block. The fixed block is fixed to the partition of the main body; the telescopic block with the spring I installed is arranged in the installation groove on the partition of the main body, and the clip presses the telescopic block from above the telescopic block and is fixed to the main body by screws; the length direction of the installation groove is perpendicular to the guide rail fixing groove; a boss is provided at the upper end of the push rod, and a threaded hole is provided at the lower end. The upper end of the push rod passes through the cover plate and protrudes outside the main body, and the cover plate is fixed to the main body. The upper ends of the bosses are aligned; spring II is sleeved on the push rod, the upper end of spring II is aligned with the lower end of the boss, and the lower end is against the spring support plate. When the push rod moves downward, the boss compresses spring II; a semicircular groove matching the push rod is provided at the lower end of the spring support plate, and threaded through holes and threaded blind holes are provided on both sides of the groove. The two spring support plates are connected by screws to fix spring II; a threaded through hole is provided at the upper end of the spring support plate, which is fixed to the main body by screws; the push block is fixed to the lower end of the push rod by screws, and the left end face is in contact with the clip; the push rod moves downward and pushes the telescopic block to move through the push block, and the spring I contracts.

[0013] The spring support plate has a Z-shaped cross section.

[0014] The front end and the upper end of the telescopic block are trenches.

[0015] The beneficial effects of the utility model are as follows: the impact overload indicator utilizes two groups of unequally spaced magnet pairs and a force-bearing magnet located on the middle guide rail slider to form a core component; the slider can move within a certain range on the guide rail; when the impact received by the red alarm device thereon exceeds a threshold value, the movement of the slider will exceed a critical point, the impact overload indicator will be triggered, and a red alarm signal can be seen through the window.

[0016] An anti-return mechanism is arranged above the critical point of the slider movement to ensure that after the impact overload indicator triggers the alarm signal, there will be no misjudgment due to the retraction of the slider.

[0017] The core of the utility model is to realize its function through the magnetic field interaction of permanent magnets, and compared with the traditional impact overload indicator, the accuracy reduction caused by wear is effectively weakened. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0019] Figure 2 It is a top view of the utility model;

[0020] Figure 3 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 4 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 5 It is an exploded view of the overall assembly of the utility model;

[0023] Figure 6 It is a top view of the utility model (to illustrate the internal structure, the cover plate is not shown);

[0024] Figure 7 A schematic diagram of the polarity and interaction of magnets in the utility model;

[0025] Figure 8 It is a schematic diagram of the anti-return structure in the utility model;

[0026] in,

[0027] 1-main body, 2-linear guide, 3-magnet, 4-left magnet hoop, 5-screw I, 6-window, 7-cover plate, 8-spring support plate, 9-screw II, 10-screw III, 11-top rod, 12-warning sign, 13-top block, 14-clip, 15-right magnet hoop, 16-telescopic block, 17-spring I, 18-slider, 19-screw IV, 20-bottom plate, 21-partition plate, 22-fixed block. DETAILED DESCRIPTION

[0028] In order to better explain the present invention and facilitate understanding, the technical scheme and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0029] like Figure 1-8 As shown, an impact overload indicator includes a main structure, a permanent magnetic structure and an anti-return mechanism arranged in the main structure.

[0030] The main structure includes a main body 1, a bottom plate 20, a cover plate 7 and a viewing window 6. The main body 1 is a multi-diameter cylindrical shape, including an upper and lower part, with a partition 21 in the middle of the two parts, which are not connected. The bottom plate 20 is connected to the main body 1 below, and the bottom plate 20 is connected to the main body 1 through screws II 9. The bottom plate 20 has through holes at the four corners, and can be connected to the outer packaging of the goods by bolts. The cover plate 7 is connected to the top of the main body 1, and the cover plate 7 is connected to the main body 1 through screws II 9; the cover plate 7 is provided with a viewing window 6, and the viewing window 6 is connected to the cover plate 7 through screws I 5. The screws I 5 are slotted pan head screws, and the screws II 9 are hexagonal cone-end set screws.

[0031] The permanent magnet structure includes two groups of magnet pairs with unequal distances, a force magnet installed on a slider 18, a linear guide rail 2 and a warning sign 12. The linear guide rail 2 is fixed to the center groove opened in the center of the main body 1 by screws IV19. The center groove is a rectangular groove, which is opened radially on the partition 21. The linear guide rail 2 is arranged perpendicular to the axis of the main body 1; the end of the linear guide rail 2 corresponds to the window 6. The slider 18 is slidably connected to the linear guide rail 2 and can move within a limited range. The force magnet is installed on the slider 18. The warning sign 12 is fixed to the upper end of the slider 18 by screws I 5, which also plays the role of fixing the force magnet on the slider 18. The warning sign 12 is red. The two groups of unequally spaced magnet pairs include a close-distance magnet pair and a long-distance magnet pair, which are placed in the fixing grooves provided on the partition 21 of the main body 1 and symmetrically arranged on both sides of the stressed magnet. The magnet 3 on the left side is fixed to the main body 1 by the left magnet hoop 4 and the screw II 9, and the magnet 3 on the right side is fixed to the main body 1 by the right magnet hoop 15 and the screw II 9; wherein the close-distance magnet pair with the close distance between the two magnets is closer to the side of the window 6. The magnet pair has the same polarity as the opposite side of the stressed magnet.

[0032] The main body 1 is provided with a front end small hole corresponding to the sliding direction of the slider 18 .

[0033] The anti-return mechanism is arranged between the viewing window 6 and the close-range magnet pair. The slider 18 drives the stressed magnet to slide to a position exceeding the center line of the close-range magnet pair. The stressed magnet is subjected to the force of the magnet pair and continues to slide forward until it exceeds the anti-return mechanism. After exceeding the anti-return mechanism, the red warning mark 12 on the top of the slider 18 can be observed through the viewing window 6. The anti-return mechanism includes a top rod 11, a top block 13, a telescopic block 16, a clip 14, a spring I17 and a spring support plate 8. The telescopic block 16 is provided with a circular groove matching the spring I17. One end of the spring I17 is installed in the circular groove, and the other end is fixed to the fixed block 22. The fixed block 22 is fixed to the partition 21 of the main body 1. The telescopic block 16 with the spring I17 installed is arranged in the installation groove on the partition 21 of the main body 1. The clip 14 presses the telescopic block 16 from above the telescopic block 16 and is fixed to the main body 1 by the screw IV19. The length direction of the installation groove is perpendicular to the guide rail fixing groove. The telescopic block 16 slides along the installation groove below the clip 14, driving the spring I17 to expand and contract. The upper end of the push rod 11 is provided with a boss, and the lower end is provided with a threaded hole. The upper end of the push rod 11 passes through the cover plate 7 and protrudes outside the main body 1. The cover plate 7 is aligned with the upper end of the boss. Spring II is sleeved on the push rod 11, and the upper end of spring II is aligned with the lower end of the boss. The lower end of spring II is against the spring support plate 8. When the push rod 11 moves downward, the boss compresses the spring II. The cross section of the spring support plate 8 is Z-shaped. The lower end of the spring support plate 8 is provided with a semicircular groove matching the push rod 11. There are threaded through holes and threaded blind holes on both sides of the groove. The two spring support plates 8 are connected by screws III 10 to fix the spring II; the upper end of the spring support plate 8 is provided with a threaded through hole and fixed to the main body 1 by screws I 5. The top block 13 is fixed to the lower end of the push rod 11 by screws IV 19, and the left end face is in contact with the clip 14. The front end and the upper end of the telescopic block 16 are blocking, and the push rod 11 moves downward to push the telescopic block 16 through the push block 13, and the spring I17 contracts.

[0034] The screw III 10 and the screw IV 19 are both hexagon socket cone-end set screws.

[0035] During installation, first connect the bottom plate 20 to the main body 1 through screws II 9, then place the stressed magnet in the slider 18, and connect the warning sign 12 to the slider 18 through screws I 5 to tighten the stressed magnet. Install the connected slider 18 on the linear guide 2, and the linear guide 2 is fixed in the central groove of the main body 1 through screws IV 19 to ensure that the slider 18 can move within the length of the linear guide. Place two sets of magnets in the fixed grooves of the main body 1, and fix them to the main body 1 with magnet hoops and screws II 9. Put the spring I17 into the groove corresponding to the telescopic block 16, and then place it in the corresponding installation groove of the main body 1, and fix it to the main body 1 with clips 14 and screws IV 19 to ensure that the telescopic block 16 can pop out and shrink freely. Put the spring II on the lower end of the boss of the top rod 11, fix the top block 13 to the lower end of the top rod 11 through screws IV 19, fit the lower end grooves of the two spring support plates 8 to the top rod 11, and connect the two spring support plates 8 with screws III 10. Pass the upper end of the push rod 11 through the corresponding hole on the cover plate 7, and fix the upper end of the spring support plate 8 to the main body 1 by screws I 5. Connect the window 6 to the cover plate 7 by screws I 5, and connect the cover plate 7 to the main body 1 by screws II 9. Finally, install the impact overload indicator on the outer packaging of the goods through the through hole of the bottom plate 20 with bolts.

[0036] When detecting impact in the vertical direction, the main structure is installed horizontally, the central axis of the main body is parallel to the horizontal direction, and the through holes at the four corners of the bottom plate 20 are connected to the vertical surface of the outer packaging of the goods by bolts. At this time, the two sets of unequally spaced magnet pairs are in an upper and lower position relationship, and the close-distance magnet pair is located above the long-distance magnet pair. When the goods are subjected to an impact exceeding the threshold, when the center movement of the slider 18 of the impact overload indicator exceeds the center line of the close-distance magnet pair, the impact overload indicator is triggered, and the slider 18 is subjected to the force of the magnet pair and continues to slide upward toward the anti-return mechanism. When it slides to the anti-return mechanism, the slider 18 pushes the telescopic block 16 and the spring I17 contracts; after the slider 18 slides over the anti-return mechanism, the spring I17 returns to its original length, pushes out the telescopic block 16, and the end of the telescopic block 16 extends to prevent sliding back. At this time, a red alarm sign can be observed through the window 6. If you want to reset the impact overload indicator, you need to press the push rod 11 downward, and at the same time use a thin rod to pass through the small hole at the front end of the main body 1 to push the slider 18 back to the initial position, and then release the push rod 11.

[0037] When detecting impact in the horizontal direction, the main structure is installed vertically, the central axis of the main body is perpendicular to the horizontal direction, and the through holes at the four corners of the bottom plate 20 are connected to the horizontal plane of the outer packaging of the goods by bolts. At this time, the two sets of unequally spaced magnet pairs are located in the same horizontal plane. When the goods are subjected to an impact exceeding the threshold, the center movement of the slider 18 of the impact overload indicator exceeds the center line of the close-range magnet pair, and the impact overload indicator is triggered. The slider 18 is subjected to the force of the magnet pair and continues to slide forward toward the anti-return mechanism. When it slides to the anti-return mechanism, the slider 18 pushes the telescopic block 16 and the spring I17 contracts; after the slider 18 slides over the anti-return mechanism, the spring I17 returns to its original length, pushes out the telescopic block 16, and the end of the telescopic block 16 extends to prevent sliding back. At this time, a red alarm sign can be observed through the window 6. If you want to reset the impact overload indicator, you need to press the push rod 11 downward, and at the same time use a thin rod to pass through the small hole at the front end of the main body 1 to push the slider 18 back to the initial position, and then release the push rod 11.

Claims

1. An impact overload indicator, characterized in that: The invention comprises a main structure and a permanent magnetic structure and an anti-return mechanism arranged in the main structure. A window is arranged on the top of the main structure to observe the interior. The permanent magnetic structure comprises a force-bearing magnet sliding radially along the main structure and two groups of magnet pairs symmetrically arranged on both sides of the main structure with unequal distances. The permanent magnetic structure is arranged between the window and the magnet pair closest to the window and is used for limiting the reverse movement of the force-bearing magnet. After the force-bearing magnet is subjected to the force of the magnet pair and slides forward to exceed the anti-return mechanism, a red warning mark on the top of the slider can be observed through the window. When in use, the main structure is installed vertically or horizontally to detect impact in the horizontal or vertical direction. When installed horizontally, the group of close-distance magnet pairs with close distances between the two magnets is located at the top.

2. The impact overload indicator according to claim 1, characterized in that: The main structure comprises a main body, which is a multi-diameter cylindrical body and comprises an upper and a lower part, wherein a partition is provided between the two parts so as to prevent the two parts from being communicated with each other.

3. The impact overload indicator according to claim 2, characterized in that: A bottom plate is connected to the lower part of the main body, and the bottom plate is connected to the main body by screws; through holes are arranged at the four corners of the bottom plate, and the bottom plate can be connected to the outer packaging of the goods by bolts.

4. The impact overload indicator according to claim 2, characterized in that: The permanent magnet structure includes a linear guide rail, which is fixed at a center groove opened in the center of the main body and radially opened on the partition. The linear guide rail is arranged perpendicular to the axis of the main body, and the end of the linear guide rail corresponds to the window; the slider is slidably connected to the linear guide rail, and the force magnet is installed on the slider; a warning sign is fixed on the upper end of the slider.

5. The impact overload indicator according to claim 4, characterized in that: The central groove is a rectangular groove.

6. The impact overload indicator according to claim 4, characterized in that: The two groups of unequally spaced magnet pairs include a close-distance magnet pair and a long-distance magnet pair, which are placed in a fixing groove provided on the main body partition and fixed to the main body by a magnet hoop; wherein the group of close-distance magnet pairs with a close distance between the two magnets is closer to the window side; the magnet pairs have the same magnetic polarity as the opposite side of the force-bearing magnet.

7. The impact overload indicator according to claim 4, characterized in that: The main body is provided with a front end small hole corresponding to the sliding direction of the slider.

8. The impact overload indicator according to claim 2, characterized in that: The anti-return mechanism includes a push rod, a push block, a telescopic block, a clip, a spring I and a spring support plate. The telescopic block is provided with a circular groove matching the spring I. One end of the spring I is installed in the circular groove, and the other end is fixed to the fixed block. The fixed block is fixed to the partition of the main body; the telescopic block with the spring I installed is arranged in the installation groove on the partition of the main body, and the clip presses the telescopic block from above the telescopic block and is fixed to the main body by screws; the length direction of the installation groove is perpendicular to the guide rail fixing groove; a boss is provided at the upper end of the push rod, and a threaded hole is provided at the lower end. The upper end of the push rod passes through the cover plate and protrudes outside the main body, and the cover plate is fixed to the main body. The upper ends of the bosses are aligned; spring II is sleeved on the push rod, the upper end of spring II is aligned with the lower end of the boss, and the lower end is against the spring support plate. When the push rod moves downward, the boss compresses spring II; a semicircular groove matching the push rod is provided at the lower end of the spring support plate, and threaded through holes and threaded blind holes are provided on both sides of the groove. The two spring support plates are connected by screws to fix spring II; a threaded through hole is provided at the upper end of the spring support plate, which is fixed to the main body by screws; the push block is fixed to the lower end of the push rod by screws, and the left end face is in contact with the clip; the push rod moves downward and pushes the telescopic block to move through the push block, and the spring I contracts.

9. The impact overload indicator according to claim 8, characterized in that: The cross section of the spring support plate is Z-shaped.

10. The impact overload indicator according to claim 8, characterized in that: The front end and the upper end of the telescopic block are trench plugs.

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