Constant force spring testing device

Abstract

The utility model discloses a constant force spring testing device, which comprises a bearing and positioning assembly, a pushing mechanism, a counting module and a control module, and is characterized in that the bearing and positioning assembly comprises a bearing piece, the bearing piece is used for bearing a coil part of a constant force spring, and a positioning part is arranged on one side of the bearing piece; the positioning part is used for positioning the free end of the constant force spring; the pushing mechanism is arranged on one side of the positioning part and comprises a pushing driver and a pushing piece, the driving end of the pushing driver is connected with the pushing piece, and the pushing piece is used for abutting against the coil part and can push the coil part to stretch out and draw back in a reciprocating mode relative to the free end under driving of the pushing driver; the counting module is used for counting times of pushing the coil part by the pushing piece; the control module is electrically connected with the pushing mechanism and the counting assembly. The constant force spring testing device provided by the embodiment of the utility model can effectively simulate the operation mode of the constant force spring in the display support and measure the service life of the constant force spring.

Description

Technical Field

[0001] This utility model relates to the field of durability testing technology, and in particular to a constant force spring testing device. Background Technology

[0002] In related technologies, monitor stands include a stand body, a lifting mechanism, and a constant force spring. The lifting mechanism is slidably connected to the stand body in a vertical direction and is used to connect the monitor. The free end of the constant force spring is fixedly connected to the stand body, while the coil portion of the constant force spring is connected to the lifting mechanism. During monitor height adjustment, the coil portion extends and retracts relative to the free end to provide upward or downward force to the monitor. Since monitor stands need to withstand 3000 to 3500 height adjustments in actual use, the performance requirements for the constant force springs used in monitor stands are relatively high. If substandard constant force springs that do not meet performance requirements are installed in the monitor stand, after a certain number of height adjustments, the constant force springs may develop problems such as wrinkling, breakage, and delamination, rendering the monitor stand unusable and resulting in significant disassembly and repair costs. By sampling and testing a batch of constant force springs before installation, simulating their actual operation in the monitor stand, and obtaining lifespan data, the possibility of installing a batch of substandard constant force springs into the monitor stand product can be eliminated or reduced. However, in actual production, obtaining the above data is difficult. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a constant force spring testing device, which can effectively simulate the operation of a constant force spring in a monitor stand product and detect its service life.

[0004] A constant force spring testing device according to an embodiment of the present invention includes a bearing positioning component, a pushing mechanism, a counting module, and a control module. The bearing positioning component includes a bearing member for bearing the coil portion of the constant force spring. A positioning part is provided on one side of the bearing member for positioning the free end of the constant force spring. The pushing mechanism is provided on one side of the positioning part and includes a pushing driver and a pushing member. The driving end of the pushing driver is connected to the pushing member, and the pushing member is used to abut against the coil portion and can push the coil portion to reciprocate and extend relative to the free end under the drive of the pushing driver. The counting module is used to count the number of times the pushing member pushes the coil portion. The control module is electrically connected to the pushing mechanism and the counting module.

[0005] The constant force spring testing device according to the embodiments of this utility model has at least the following beneficial effects:

[0006] In this embodiment of the invention, the coil of the constant force spring extends and contracts under the drive of the pusher. The control module and the counting module measure the number of times the pusher drives the constant force spring. On the one hand, the coil rotates during the extension and contraction of the constant force spring and rubs against the pusher, effectively simulating the operation of the constant force spring in the monitor bracket. On the other hand, the counting module measures the number of times the pusher drives the constant force spring, and the spring's service life data can be obtained after the spring is damaged. Therefore, the constant force spring testing device of this embodiment of the invention can effectively simulate the operation of the constant force spring in the monitor bracket and measure its service life.

[0007] According to some embodiments of the constant force spring testing device of the present invention, multiple positioning parts are provided, and the multiple positioning parts are detachably disposed on one side of the bearing member.

[0008] According to some embodiments of the constant force spring testing device of the present invention, a mounting groove is provided on one side of the bearing member, and multiple positioning parts can be detachably installed in the mounting groove.

[0009] According to some embodiments of the constant force spring testing device of the present invention, at least one side wall of the mounting groove is detachable.

[0010] According to some embodiments of the constant force spring testing device of the present invention, the positioning part is provided with a positioning threaded hole, and the positioning threaded hole is used to cooperate with the fastener passing through the free end to fix the free end.

[0011] According to some embodiments of the constant force spring testing device of the present utility model, the pushing mechanism further includes baffles and guide rails. Two baffles are provided, which are opposite to each other and spaced apart on both sides of the positioning part. Two guide rails are provided, which are opposite to each other and spaced apart between the two baffles. The two ends of the two guide rails are respectively connected to the two baffles. The pushing member is slidably connected to the two guide rails.

[0012] According to some embodiments of the constant force spring testing device of the present invention, a baffle near the push driver is provided with a through hole, the push driver is a cylinder, and the piston rod of the cylinder passes through the through hole and is connected to the pusher.

[0013] According to some embodiments of the constant force spring testing device of the present invention, the counting module includes a magnetostrictive displacement sensor. Two magnetostrictive displacement sensors are provided, and the two magnetostrictive displacement sensors are installed on the cylinder body at intervals along the axial direction of the cylinder.

[0014] According to some embodiments of the constant force spring testing device of the present invention, the pushing mechanism further includes a pneumatic pressure regulating switch, which is connected to the cylinder and used to adjust the magnitude of the cylinder driving force.

[0015] The constant force spring testing device according to some embodiments of the present invention further includes a protective cover, which is rotatably connected to the baffle, and can cover the upper side of the carrier by rotating the protective cover. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the overall structure of the constant force spring testing device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the support and positioning component.

[0019] Figure 3 for Figure 2 The schematic diagram of the mounting slot structure shown is shown below;

[0020] Figure 4 for Figure 2 Schematic diagram of the positioning part shown;

[0021] Figure 5 for Figure 1 The diagram shows the actuation mechanism.

[0022] Figure 6 for Figure 1 The diagram shows the control module.

[0023] Figure 7 for Figure 1 A schematic diagram of the constant force spring shown;

[0024] Figure 8 for Figure 1 The top view of the overall structure of the constant force spring testing device shown.

[0025] Explanation of reference numerals in the attached figures:

[0026] The following components are included: a bearing and positioning assembly 10; a mounting groove 10a; a positioning part 10b; a base plate 110; a bearing component 120; a pad 130; a limit block 140; a positioning block 150; a positioning threaded hole 160; a pushing mechanism 20; a baffle 210; a guide rail 220; a pushing component 230; a pushing driver 240; a piston rod 241; a control module 30; a digital display screen 310; a button 320; a counting module 410; a constant force spring 50; a free end 510; a coil part 520; a protective cover 610; and a pneumatic pressure regulating switch 710. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] The following is for reference Figures 1 to 8 This describes a constant force spring testing device according to an embodiment of the present invention.

[0032] Reference Figure 1 and Figure 2 , Figure 5 and Figure 7 According to some embodiments of the present invention, the constant force spring testing device includes a bearing positioning component 10, a pushing mechanism 20, a counting module 410, and a control module 30. The bearing positioning component 10 includes a bearing member 120, which is used to support the coil portion 520 of the constant force spring 50 and ensure that the coil portion 520 moves along the extension and retraction direction of the constant force spring 50. A positioning part 10b is provided on one side of the bearing member 120, which is used to position the free end 510 of the constant force spring 50. Positioning; the pushing mechanism 20 is disposed on one side of the positioning part 10b and includes a pushing driver 240 and a pushing member 230. The driving end of the pushing driver 240 is connected to the pushing member 230. The pushing member 230 is used to abut against the coil part 520 and can push the coil part 520 to reciprocate and extend relative to the free end 510 under the drive of the pushing driver 240; the counting module 410 is used to count the number of times the pushing member 230 pushes the coil part 520; the control module 30 is electrically connected to the pushing mechanism 20 and the counting module 410.

[0033] In this embodiment of the invention, the constant force spring 50 extends and contracts under the drive of the pusher 230. The control module 30 and the counting module 410 measure the number of times the pusher 230 drives the constant force spring 50. On the one hand, the coil part 520 rotates during the extension and retraction of the constant force spring 50, rubbing against the pusher 230, effectively simulating the operation of the constant force spring 50 in the monitor bracket. On the other hand, the counting module 410 and the control module 30 work together to measure the number of times the pusher 230 pushes the constant force spring 50. After the constant force spring 50 is damaged, its service life data can be obtained accordingly. Therefore, the constant force spring testing device of this embodiment of the invention can effectively simulate the operation of the constant force spring 50 in the monitor bracket and measure its service life.

[0034] It is understood that in some embodiments, considering that the constant force springs 50 used in different types of display brackets are of different sizes, multiple positioning parts 10b are detachably provided on one side of the support member 120 to accommodate free ends 510 of different sizes, thereby allowing the positioning parts 10b to be replaced to accommodate free ends 510 of different sizes.

[0035] In one embodiment, combined with Figure 1 and Figure 2 Multiple positioning parts 10b are detachably mounted on one side of the carrier 120 to facilitate simultaneous testing of multiple constant force springs 50.

[0036] It is understood that in some embodiments, in order to enable the positioning part 10b to be detachable, a mounting groove 10a is provided on one side of the carrier 120, and the positioning part 10b is detachably installed in the mounting groove 10a.

[0037] In one embodiment, combined with Figure 1 and Figure 2 Multiple positioning parts 10b are installed in a straight line in the mounting groove 10a. The upper surfaces of the multiple positioning parts 10b are flush. The sidewall of the mounting groove 10a can restrict the movement of the positioning parts 10b and thus fix the positioning parts 10b.

[0038] It is understood that in some embodiments, considering that the mounting groove 10a has at least one side wall that is detachable in order to further facilitate the installation and removal of the positioning part 10b, the mounting groove 10a is opened laterally by removing the side wall, which makes the process of inserting and removing the positioning part 10b simpler, and thus makes the positioning part 10b easier to remove and replace.

[0039] For example, in one embodiment, reference Figures 1 to 2The bearing positioning assembly 10 also includes a base plate 110, on which the bearing member 120, the pushing mechanism 20, and the control module 30 are all mounted. The bearing positioning assembly 10 also includes two limiting blocks 140 and two positioning blocks 150. The two limiting blocks 140 are positioned opposite each other and spaced apart on one side of the bearing member 120, and the two positioning blocks 150 are positioned opposite each other and spaced apart between the two limiting blocks 140. The two limiting blocks 140 and the two positioning blocks 150 together form a safety barrier. The mounting groove 10a, that is, each limiting block 140 and positioning block 150 constitutes the side wall of the mounting groove 10a. The two limiting blocks 140 and the two positioning blocks 150 are bolted to the base plate 110. By releasing the bolt connection between any one of the limiting blocks 140 or positioning blocks 150 and the base plate 110, the side wall of the mounting groove 10a corresponding to the limiting block 140 or positioning block 150 can be removed to form an opening, so that multiple positioning parts 10b can be pushed out from the opening.

[0040] It should be understood that, in some other embodiments, some of the limiting blocks 140 and / or some of the positioning blocks 150 may be configured to be detachable.

[0041] It is understandable that, in addition to being formed by the positioning block 150 and the limiting block 140, the mounting groove 10a can also be formed on one side edge of the support member 120.

[0042] It is understood that in some embodiments, the positioning part 10b is provided with a positioning threaded hole 160, and the free end 510 is provided with a fixing hole. The free end 510 is fixed to the positioning part 10b by fasteners such as bolts that pass through the fixing hole and cooperate with the positioning threaded hole 160.

[0043] For example, in one embodiment, combined with Figures 1 to 2 , Figure 4 and Figure 7 Specifically, two positioning threaded holes 160 are provided on the upper surface of the positioning part 10b, and the two positioning threaded holes 160 are opposite to each other and spaced apart. The distance between the two positioning threaded holes 160 corresponds to the distance between the two fixing holes on the free end 510.

[0044] It should be understood that, in some other embodiments, a switchable magnetic base can be selected as the positioning part 10b. The switchable magnetic base is connected to the base plate 110, and the free end 510 is fixed to the switchable magnetic base by magnetic attraction. The free end 510 can be disassembled and installed by switching the switchable magnetic base. Alternatively, in some other embodiments, the positioning part 10b can also be provided with a snap-fit ​​structure or a clamping structure to snap or clamp the free end 510.

[0045] It is understood that, in some of these embodiments, the combination Figure 1 and Figure 5 The pushing mechanism 20 also includes baffles 210 and guide rails 220. Two baffles 210 are provided, which are opposite to each other and spaced apart on both sides of the positioning part 10b. The two baffles 210 serve to fix the guide rails 220. Two guide rails 220 are provided, which are opposite to each other and spaced apart between the two baffles 210. The two ends of the two guide rails 220 are respectively connected to the two baffles 210. The pushing member 230 is slidably connected to the two guide rails 220 to ensure that the pushing member 230 moves along the extension and retraction direction of the constant force spring 50.

[0046] It is understood that in some embodiments, the drive driver 240 is a cylinder, and the baffle 210 adjacent to the drive driver 240 is provided with a through hole. The piston rod 241 of the cylinder passes through the through hole and is connected to the pusher 230 to drive the pusher 230 to push the coil part 520 to reciprocate, thereby causing the constant force spring 50 to extend and retract. The coil part 520 rotates and rubs against the pusher 230 during the extension and retraction of the constant force spring 50, effectively simulating the operation mode of the constant force spring 50 in the display bracket.

[0047] In one embodiment, combined with Figures 1 to 2 , Figure 5 Specifically, the bearing positioning assembly 10 also includes a pad 130, the cylinder body is mounted on the pad 130, the pad 130 is used to adjust the height of the piston rod 241 axis relative to the positioning part 10b, the pad 130 is located on the side of one baffle 210 facing away from the other baffle 210, the baffle 210 adjacent to the cylinder is provided with a through hole, the piston rod 241 passes through the through hole and is bolted to the pusher 230.

[0048] It should be understood that, in some other embodiments, a ball screw motor may also be selected as the drive driver 240.

[0049] It is understood that in some embodiments, the counting module 410 includes two magnetostrictive displacement sensors, which are mounted on the cylinder at intervals along the cylinder's axial direction. A piston is disposed at one end of the piston rod 241 and engages with the cylinder, and the piston is provided with a magnetic element. The magnetostrictive displacement sensors detect the position of the magnetic element, thereby detecting the movement position of the piston rod 241 through the cylinder body. The magnetostrictive displacement sensors are electrically connected to the control module 30, thereby enabling them to work with the control module 30 to measure the number of times the pusher 230 pushes the coil section 520.

[0050] It should be understood that, in some other embodiments, the counting module 410 may also employ a photoelectric sensor.

[0051] Understandably, in combination Figure 6 In some embodiments, the control module 30 is provided with a digital display screen 310 and several buttons 320. The buttons 320 can be used to control the start and stop of the cylinder or set the number of times the cylinder is pushed. The digital display screen 310 can be used to display the number of times the pusher 230 pushes the coil part 520.

[0052] It is understood that in some embodiments, considering the need to adjust the cylinder driving force, the push mechanism 20 also includes a pressure regulating switch 710, which is connected to the cylinder and makes the cylinder driving force adjustable, thereby meeting the need for different cylinder driving forces under different conditions.

[0053] In one embodiment, combined with Figure 8 The air pressure regulating switch 710 is mounted on one side of the cylinder and located on the base plate 110. It is understood that the air pressure regulating switch 710 can also be mounted in other locations that do not affect the operation of the constant force spring testing device.

[0054] It is understood that in some embodiments, in order to prevent the constant force spring 50 from flying out and injuring people during the test, the constant force spring testing device is provided with a protective cover 610. The protective cover 610 is rotatably connected to the baffle 210. By rotating the protective cover 610, the protective cover 610 can cover the upper side of the support member 120, which facilitates the disassembly and installation of the constant force spring 50 while providing protection.

[0055] In one embodiment, combined with Figure 1 and Figure 8 Specifically, the protective cover 610 is mounted on the baffle 210 adjacent to the cylinder, and the protective cover 610 and the baffle 210 are rotatably connected by a hinge. It can be understood that the protective cover 610 can also be optionally mounted on the baffle 210 on the other side.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A constant force spring testing device, characterized in that, include: The bearing positioning assembly (10) includes a bearing member (120) for bearing the coil portion (520) of the constant force spring (50). A positioning part (10b) is provided on one side of the bearing member (120) for positioning the free end (510) of the constant force spring (50). The pushing mechanism (20) is disposed on one side of the positioning part (10b) and includes a pushing driver (240) and a pushing member (230). The driving end of the pushing driver (240) is connected to the pushing member (230). The pushing member (230) is used to abut against the coil part (520) and can push the coil part (520) to reciprocate and extend relative to the free end (510) under the drive of the pushing driver (240). A counting module (410) is used to count the number of times the pusher (230) pushes the coil (520); The control module (30) is electrically connected to the pushing mechanism (20) and the counting module (410).

2. The constant force spring testing device according to claim 1, characterized in that, Multiple positioning parts (10b) are provided, and multiple positioning parts (10b) are detachably provided on one side of the carrier (120).

3. The constant force spring testing device according to claim 2, characterized in that, The support member (120) has a mounting groove (10a) on one side, and the plurality of positioning parts (10b) can be detachably installed in the mounting groove (10a).

4. The constant force spring testing device according to claim 3, characterized in that, The mounting slot (10a) has at least one side wall that is removable.

5. A constant force spring testing device according to any one of claims 1 to 4, characterized in that, The positioning part (10b) is provided with a positioning threaded hole (160), and the positioning threaded hole (160) is used to cooperate with a fastener passing through the free end (510) to fix the free end (510).

6. A constant force spring testing device according to any one of claims 1 to 4, characterized in that, The pushing mechanism (20) further includes baffles (210) and guide rails (220). There are two baffles (210), which are opposite to each other and spaced apart on both sides of the positioning part (10b). There are two guide rails (220), which are opposite to each other and spaced apart between the two baffles (210). The two ends of the two guide rails (220) are respectively connected to the two baffles (210). The pushing member (230) is slidably connected to the two guide rails (220).

7. A constant force spring testing device according to claim 6, characterized in that, The baffle (210) adjacent to the push driver (240) is provided with a through hole. The push driver (240) is a cylinder. The piston rod (241) of the cylinder passes through the through hole and is connected to the push member (230).

8. A constant force spring testing device according to claim 7, characterized in that, The counting module (410) includes a magnetostrictive displacement sensor. Two magnetostrictive displacement sensors are provided and are installed on the cylinder body of the cylinder at intervals along the axial direction of the cylinder.

9. A constant force spring testing device according to claim 7, characterized in that, The pushing mechanism (20) also includes a pressure regulating switch (710), which is connected to the cylinder and is used to adjust the driving force of the cylinder.

10. A constant force spring testing device according to claim 6, characterized in that, The constant force spring (50) testing device also includes a protective cover (610), which is rotatably connected to the baffle (210), and can cover the upper side of the support member (120) by rotating the protective cover (610).

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