Pressure resistance testing device for draw-bar box

Abstract

The invention discloses a pressure resistance testing device for a draw-bar box, which belongs to the technical field of draw-bar box testing and comprises a base, a supporting box body is arranged on the base, a testing cylinder capable of moving transversely and longitudinally is arranged on the supporting box body, a testing rod is arranged at the bottom of a piston rod of the testing cylinder, and a pressure sensor is arranged between the testing rod and the piston rod. And a position-adjustable wireless distance measuring sensor is arranged below the test cylinder. The testing equipment comprises three groups of sensors, namely a pressure sensor, a first group of distance measuring sensors and a second group of distance measuring sensors, wherein the pressure sensor is used for detecting a downward pressing force value; the first distance measuring sensor is used for detecting a downward pressing displacement value of the test pressure head; the second group of distance measuring sensors are used for detecting the downward pressing displacement value of the draw-bar box body pressed by the testing pressure head, and the downward pressing displacement values of the box body in different ranges can be tested through the cooperation of components such as a rack and a gear, so that the deformation quantity and the deformation range in the draw-bar box test can be tested, and more accurate test data can be obtained.

Description

Technical Field

[0001] This invention relates to the field of trolley case testing technology, and more specifically to a trolley case pressure resistance testing device. Background Technology

[0002] With the rapid development of the travel industry, rolling suitcases, as convenient storage and transportation tools, have their product quality directly affecting user experience and property security. Pressure resistance is one of the core indicators for evaluating rolling suitcase quality. During transportation, stacking, and carrying, rolling suitcases often face compression pressure on the top, sides, and other parts. If the pressure resistance is insufficient, problems such as dents, cracks, and deformation of the handle can easily occur. Therefore, in the manufacturing and quality inspection stages of rolling suitcases, it is necessary to strictly test their pressure resistance using professional pressure testing equipment.

[0003] Existing pressure resistance testing devices for suitcases primarily rely on pressure sensors to detect pressure. Their working principle involves applying gradually increasing pressure to the test area of ​​the suitcase via a driving mechanism. When the pressure value detected by the sensor reaches a preset threshold or the suitcase shows significant structural damage, the pressure data is recorded, serving as the basis for assessing the suitcase's pressure resistance. However, these existing pressure testing devices have significant technical limitations in practical applications: they can only measure the instantaneous pressure value when the suitcase deforms or is damaged, failing to simultaneously acquire the specific deformation of the suitcase under pressure, nor can they accurately define the range of deformation. In actual product quality testing and R&D processes, a single pressure value is insufficient to comprehensively reflect the suitcase's pressure resistance performance—for example, suitcases of different materials and structural designs may exhibit varying degrees of deformation under the same pressure; some suitcases, while not reaching the damage threshold, may have excessive deformation affecting normal use. Furthermore, the range of deformation directly relates to the structural stability assessment of critical parts of the suitcase, a dimension that existing devices cannot support, resulting in limited reference value for the test results. Therefore, this invention provides a pressure resistance testing device for suitcases. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure resistance testing device for a suitcase.

[0005] To solve the above-mentioned technical problems, the objective of this invention is achieved as follows: A pressure resistance testing device for a suitcase includes: a base, on which a suitcase fixing mechanism and a supporting box are provided, the suitcase fixing mechanism including four movable fixing plates; The support box is equipped with a horizontally moving module, which in turn is equipped with a horizontally movable vertically moving module. The vertically moving module is equipped with a vertically movable mounting plate. The mounting plate is equipped with a fixed plate extending horizontally to one side. A test cylinder is mounted on the fixed plate. The piston rod of the test cylinder passes through the fixed plate and extends below it. A test rod is connected to the bottom end of the piston rod. A pressure sensor is installed between the top of the test rod and the piston rod of the test cylinder, and a test pressure head is installed at the bottom. A fixed disk is disposed below the fixed plate. A through hole is formed at the center of the fixed disk for the piston rod of the test cylinder to pass through, and an inner fixed ring is disposed around the through hole. A gear ring is rotatably disposed on the fixed disk, arranged along the edge of the fixed disk, with teeth on both its inner and outer sides. Several gears are evenly distributed along the circumference of the fixed disk, located inside the gear ring and meshing with it, with the height of the gears exceeding the height of the gear ring. A drive gear meshes with the gear ring on its outer side, and the drive gear is driven by a drive device. An outer fixing ring is provided above the gear ring, and the top of the outer fixing ring is connected to a top plate. The center of the top plate is fixedly connected to the inner fixing ring, so that the outer fixing ring is fixed relative to the fixed disk. The outer fixing ring has a number of sliding grooves equal to the number of gears and evenly distributed along the circumference of the fixed disk. A rack is provided in the sliding groove, and the rack meshes with the gears at the part above the gear ring. A regular polygonal connecting cylinder is provided at the top of the top plate, and the top plate is connected to the fixed plate through the connecting cylinder. The first end of the rack is always located outside the outer fixing ring, and a mounting block is provided at its first end; a first wireless ranging sensor and a second wireless ranging sensor are provided on the mounting block; the first wireless ranging sensor is vertically downward and is used to measure the indentation displacement value of the trolley case; the second wireless ranging sensor is horizontally oriented towards the center of the fixed disk and is used to measure the distance between the first wireless ranging sensor and the side wall of the connecting cylinder. A third wireless ranging sensor, facing downwards, is installed at the bottom of the fixed disk. The third wireless ranging sensor is positioned corresponding to the test pressure head and is used to measure the downward displacement value of the test pressure head.

[0006] Based on the above solution and as a preferred embodiment, the fixing clamp is vertically arranged, and a horizontally arranged sliding plate is provided at its bottom and located on the top surface of the base; the sliding plate has a screw hole, and a bolt is threaded into the screw hole. The bolt extends from a through groove on the base to the bottom of the base and is threaded into a sliding block located on the bottom of the base; the bottom surface of the base has sliding protrusions located on both sides of the sliding block to restrict the sliding of the sliding block.

[0007] Based on the above scheme and as a preferred embodiment of the above scheme, both the horizontal movement module and the vertical movement module are lead screw movement mechanisms.

[0008] Based on the above scheme and as a preferred embodiment, a limiting block is provided at the bottom of the piston rod of the test cylinder, and the limiting block extends to one side beyond the fixed disk; a vertically upward limiting rod is provided at the part of the limiting block that extends beyond the fixed disk, and the limiting rod extends upward to slide in cooperation with a fixed seat connected to the side of the fixed plate; a limiting protrusion is provided at the top of the limiting rod to prevent it from detaching from the fixed seat.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme, a middle fixing ring is fixedly provided on the fixed disk. The middle fixing ring is located between the inner fixing ring and the outer fixing ring, and a through groove adapted to the rack is provided on the middle fixing ring so that the rack can pass through.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme, the drive gear is connected to the drive device disposed above the fixed plate via a shaft; the side of the top plate extends outward to accommodate the shaft.

[0011] Compared with the prior art, the present invention has the following advantages and beneficial effects: The testing equipment of the present invention includes three sets of sensors: a pressure sensor, a first set of distance sensors, and a second set of distance sensors. The pressure sensor is used to detect the downward force value; the first distance sensor is used to detect the displacement value of the test head under pressure; and the second set of distance sensors is used to detect the downward displacement value of the luggage body under the test head. It can also test the downward displacement value of the luggage body in different ranges through the cooperation of components such as racks and gears, so as to realize the testing of deformation and deformation range in the testing of luggage and obtain more accurate test data. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 This is a partial structural diagram of the present invention.

[0014] Figure 3 for Figure 2 Partial structural diagram.

[0015] Figure 4 for Figure 3 Explosion diagram.

[0016] Figure 5 This is a schematic diagram of the fixed disk and the structure above it in this invention.

[0017] Figure 6 for Figure 5 Explosion diagram.

[0018] Figure 7 for Figure 5 Top view of part of the structure.

[0019] Figure 8 This is a schematic diagram of the fixing clamp structure of the present invention.

[0020] Figure 9 This is a schematic diagram of the bottom surface of the base of the present invention.

[0021] In the diagram: 1. Base; 2. Support box; 3. Fixing clamp; 4. Horizontal movement module; 5. Vertical movement module; 6. Mounting plate; 7. Fixing plate; 8. Test cylinder; 9. Test rod; 10. Pressure sensor; 11. Test pressure head; 12. Fixing disc; 13. Gear ring; 14. Tooth; 15. Gear; 16. Outer fixing ring; 17. Top plate; 18. Inner fixing ring; 19. Rack; 20. Mounting block; 21. First wireless ranging sensor; 22. Second wireless ranging sensor; 23. Connecting cylinder; 24. Third wireless ranging sensor; 25. Drive gear; 26. Drive device; 27. Slide plate; 28. Bolt; 29. ​​Sliding block; 30. Sliding protrusion; 31. Limiting block; 32. Limiting rod; 33. Fixing seat; 34. Middle fixing ring; 35. Shaft. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of the present invention, preferred embodiments of the present invention are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present patent.

[0023] like Figure 1As shown, a pressure resistance testing device for a suitcase includes: a base 1, on which a suitcase fixing mechanism and a supporting body 2 are mounted. The suitcase fixing mechanism includes four movable fixing plates 3, which are respectively fitted onto the four sides of the suitcase to clamp the suitcase and prevent it from moving during testing.

[0024] Preferably, such as Figure 8 and Figure 9 As shown, the fixed clamping plate 3 is vertically positioned, with a horizontally positioned sliding plate 27 at its bottom, located on the top surface of the base 1. The sliding plate 27 has screw holes, with bolts 28 threaded into them. The bolts 28 extend from a through slot on the base 1 to the bottom of the base 1 and threadedly engage with a sliding block 29 located below the base 1. The bottom surface of the base 1 has sliding protrusions 30 located on both sides of the sliding block 29, used to restrict the sliding of the sliding block 29. The sliding protrusions 30 are linear, allowing the sliding block 29 to slide only along a straight line, and due to the restriction of the sliding protrusions 30 on both sides, the sliding block 29 cannot rotate. In use, the operator rotates the bolts 28 to raise it, then moves the fixed clamping plate 3, and then rotates the bolts 28 in the opposite direction to lower it, engaging with the sliding block 29 to clamp the base 1, thus fixing the position of the fixed clamping plate 3.

[0025] like Figure 2 As shown, the support box 2 is located at the end of the base 1, and a horizontal moving module 4 is provided on its side. A vertical moving module 5, which can move horizontally, is provided on the horizontal moving module 4, and a vertically moving mounting plate 6, which can move vertically, is provided on the vertical moving module 5. Preferably, both the horizontal moving module 4 and the vertical moving module 5 are lead screw moving mechanisms. The lead screw is driven to rotate by a servo motor, and the movement is driven by the lead screw, which can realize the precise horizontal and vertical movement of the mounting plate 6 and the structure on the mounting plate 6.

[0026] like Figure 3 and Figure 4 As shown, a horizontally extending fixing plate 7 is provided on the mounting plate 6. A test cylinder 8 is mounted on the fixing plate 7. The piston rod of the test cylinder 8 extends through the fixing plate 7 to below it, and a test rod 9 is connected to the bottom end of the piston rod. A pressure sensor 10 is installed between the top of the test rod 9 and the piston rod of the test cylinder 8, and a test pressure head 11 is installed at the bottom, located above the pull-along box. The pressure sensor 10 can detect the downward pressure of the test cylinder 8 and transmit the measured data to the control computing center.

[0027] like Figures 6 to 7 As shown, a fixed disc 12 is provided below the fixed plate 7. The fixed disc 12 has a through hole in the center for the piston rod of the test cylinder 8 to pass through, and an upwardly protruding inner fixed ring 18 is provided around the through hole. A toothed ring 13 is rotatably provided on the fixed disc 12. The toothed ring 13 is arranged along the edge of the fixed disc 12, and teeth 14 are provided on both its inner and outer sides.

[0028] Meanwhile, a plurality of gears 15 are evenly distributed along the circumference of the fixed disk 12. The gears 15 are located inside the gear ring 13 and mesh with the gear ring 13, and the height of the gears 15 is higher than the height of the gear ring 13. A drive gear 25 is provided on the outer side of the gear ring 13 and meshes with it. The drive gear 25 is driven by the drive device 26. Preferably, the drive device 26 is a servo motor, which can drive the drive gear 25 to rotate in place, and the drive gear 25 in turn drives the gear ring 13 to rotate in place, and the gear ring 13 drives all the gears 15 to rotate synchronously.

[0029] The drive gear 25 is connected to the drive device 26 located above the fixed plate 7 via the shaft 35. The shaft 35 is sleeved on the side of the top plate 17 to improve the stability of the shaft 35.

[0030] An outer fixing ring 16 is provided above the toothed ring 13. The top of the outer fixing ring 16 is fixedly connected to the top plate 17, and the center of the top plate 17 is fixedly connected to the inner fixing ring 18, so that the outer fixing ring 16 is fixed relative to the fixing disc 12. The bottom of the outer fixing ring 16 is rotatably engaged with the toothed ring 13, so that the toothed ring 13 can only rotate in place.

[0031] The outer fixed ring 16 has a number of sliding grooves equal to the number of gears 15, evenly distributed along the circumference of the fixed disk 12. A rack 19 is provided in the sliding groove, which can slide radially along the fixed disk 12. The rack 19 meshes with the gears 15 above the gear ring 13. When the gears 15 rotate, they can drive the rack 19 to move radially along the fixed disk 12.

[0032] A middle fixing ring 34 is fixedly mounted on the fixed disc 12. The middle fixing ring 34 is located between the inner fixing ring 18 and the outer fixing ring 16, and a through groove adapted to the rack 19 is provided on the middle fixing ring 34 to allow the rack 19 to pass through. The middle fixing ring 34 can improve the stability of the movement of the rack 19.

[0033] A regular polygonal connecting cylinder 23 is provided on the top of the top plate 17, and the connecting cylinder 23 is connected to the fixed plate 7. The connecting cylinder 23 is hollow inside, allowing the piston rod of the test cylinder 8 to pass through. The number of sides of the regular polygonal connecting cylinder 23 is the same as the number of racks 19, and each rack 19 is perpendicular to the corresponding side of the connecting cylinder 23.

[0034] The first end of the rack 19 is always located outside the outer fixing ring 16, and a mounting block 20 is provided at its first end. A first wireless ranging sensor 21 and a second wireless ranging sensor 22 are mounted on the mounting block 20. The first wireless ranging sensor 21 is vertically downwards and is used to measure the indentation displacement value of the suitcase when pressed down. The second wireless ranging sensor 22 is horizontally oriented towards the center of the fixed disc 12 and is used to measure the distance between the first wireless ranging sensor 21 and the side wall of the connecting cylinder 23. The first wireless ranging sensor 21 and the second wireless ranging sensor 22 can move under the action of the rack 19.

[0035] A vertically downward-facing third wireless ranging sensor 24 is provided at the bottom of the fixed disc 12. The third wireless ranging sensor 24 is set to the test pressure head 11 and is used to measure the downward displacement value of the test pressure head 11.

[0036] During testing, the test pressure head 11 is pressed down by the test cylinder 8, and just as it contacts the suitcase, the force measured by the pressure sensor 10 is zero, and the value measured by the first wireless ranging sensor 21 is also zero. The test pressure head 11 continues to press down, and the displacement and pressure values ​​are measured by the third wireless ranging sensor 24 and the pressure sensor 20, respectively, and transmitted to the control calculation center to obtain a displacement-pressure curve. After the suitcase deforms, the first wireless ranging sensor 21 obtains a new displacement value. Subtracting zero from this displacement value yields the concave displacement value of a test point on the suitcase at a specific distance from the center point of the test pressure head 11. This specific distance is measured by the second wireless ranging sensor 22. This specific distance can be modified by driving the rack 19, allowing the first wireless ranging sensor 21 to measure the concave displacement values ​​at different points, thereby obtaining the deformation range of the suitcase under a certain downward pressure.

[0037] A limiting block 31 is provided at the bottom of the piston rod of the test cylinder 8, extending to one side beyond the fixed disk 12. A vertically upward limiting rod 32 is provided on the portion of the limiting block 31 that extends beyond the fixed disk 12. The limiting rod 32 extends upward to slide into a fixed seat 33 connected to the side of the fixed plate 7. Furthermore, a limiting protrusion is provided at the top of the limiting rod 32 to prevent it from detaching from the fixed seat 33. The limiting rod 32 improves the stability of the structure.

[0038] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A pressure resistance testing device for a suitcase, characterized in that, include: The base (1) is provided with a trolley case fixing mechanism and a supporting box (2). The trolley case fixing mechanism includes four movable fixing plates (3). The support box (2) is provided with a horizontal moving module (4), the horizontal moving module (4) is provided with a vertical moving module (5) that can move horizontally, the vertical moving module (5) is provided with a vertical moving mounting plate (6), the mounting plate (6) is provided with a fixing plate (7) that extends horizontally to one side, the fixing plate (7) is provided with a test cylinder (8), the piston rod of the test cylinder (8) extends through the fixing plate (7) to the bottom of the fixing plate (7), and the bottom end of the piston rod of the test cylinder (8) is connected to a test rod (9); a pressure sensor (10) is provided between the top of the test rod (9) and the piston rod of the test cylinder (8), and a test pressure head (11) is provided at the bottom; A fixed disc (12) is provided below the fixed plate (7). The fixed disc (12) has a through hole in the center for the piston rod of the test cylinder (8) to pass through, and an inner fixed ring (18) is provided around the through hole. A toothed ring (13) is rotatably provided on the fixed disc (12). The toothed ring (13) is arranged along the edge of the fixed disc (12), and teeth (14) are provided on both its inner and outer sides. A number of gears (15) are provided on the fixed disc (12) and are evenly distributed along its circumference. The gears (15) are located inside the toothed ring (13) and mesh with the toothed ring (13). The height of the gears (15) is higher than the height of the toothed ring (13). A drive gear (25) meshes with the toothed ring (13) on the outer side of the toothed ring (13). The drive gear (25) is driven by a drive device (26). An outer fixing ring (16) is provided above the gear ring (13). The top of the outer fixing ring (16) is connected to the top plate (17). The center of the top plate (17) is fixedly connected to the inner fixing ring (18), so that the outer fixing ring (16) is fixed relative to the fixed disk (12). The outer fixing ring (16) has a number of sliding grooves equal to the number of gears (15) and evenly distributed along the circumference of the fixed disk (12). A rack (19) is provided in the sliding groove. The rack (19) meshes with the gear (15) above the gear ring (13). A regular polygonal connecting cylinder (23) is provided on the top of the top plate (17), and the connecting cylinder (23) is connected to the fixed plate (7). The first end of the rack (19) is always located outside the outer fixing ring (16), and a mounting block (20) is provided at its first end; a first wireless ranging sensor (21) and a second wireless ranging sensor (22) are provided on the mounting block (20); the first wireless ranging sensor (21) is vertically downward and is used to measure the dent displacement value of the trolley case; the second wireless ranging sensor (22) is horizontally oriented towards the center of the fixed disk (12) and is used to measure the distance between the first wireless ranging sensor (21) and the side wall of the connecting cylinder (23); The bottom of the fixed disk (12) is provided with a vertically downward third wireless ranging sensor (24), which is set corresponding to the test pressure head (11) and is used to measure the downward displacement value of the test pressure head (11).

2. The pressure resistance testing device for a suitcase according to claim 1, characterized in that, The fixed clamp (3) is vertically arranged, and a sliding plate (27) is horizontally arranged at its bottom and located on the top surface of the base (1). The sliding plate (27) has a screw hole, and a bolt (28) is threaded in the screw hole. The bolt (28) extends from the through groove on the base (1) to the bottom of the base (1) and is threaded in the sliding block (29) located below the base (1). The bottom surface of the base (1) has a sliding protrusion (30), which is located on both sides of the sliding block (29) and is used to restrict the sliding of the sliding block (29).

3. The pressure resistance testing device for a suitcase according to claim 1, characterized in that, Both the horizontal moving module (4) and the vertical moving module (5) are screw moving mechanisms.

4. The pressure resistance testing device for a suitcase according to claim 1, characterized in that, The bottom of the piston rod of the test cylinder (8) is provided with a limiting block (31), which extends to one side beyond the fixed disk (12); a vertically upward limiting rod (32) is provided on the part of the limiting block (31) that extends beyond the fixed disk (12), which extends upward to slide into contact with the fixed seat (33) connected to the side of the fixed plate (7); a limiting protrusion is provided on the top of the limiting rod (32) to prevent it from detaching from the fixed seat (33).

5. The pressure resistance testing device for a suitcase according to claim 1, characterized in that, A middle fixing ring (34) is fixedly provided on the fixed disc (12). The middle fixing ring (34) is located between the inner fixing ring (18) and the outer fixing ring (16). The middle fixing ring (34) has a through groove that matches the rack (19) so that the rack (19) can pass through.

6. The pressure resistance testing device for a suitcase according to claim 1, characterized in that, The drive gear (25) is connected to the drive device (26) located above the fixed plate (7) via a shaft (35); the side of the top plate (17) extends outward to accommodate the shaft (35).

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