Pull-out force testing machine

Abstract

The present invention discloses a pulling force testing machine for performing pulling force testing on an assembled workpiece, wherein the assembled workpiece includes a workpiece body and an assembly assembled on the workpiece body, the pulling force testing machine includes a workbench, a fixing fixture arranged on the workbench for fixing the assembled workpiece, and a pulling force testing mechanism arranged on the workbench for performing pulling force testing on the assembled workpiece on the fixing fixture, and further includes a first track and a first linear drive mechanism arranged on the workbench along a first direction; a portion of the first track is located below the pulling force testing mechanism to form a pulling force testing position, and another portion of the first track outside the pulling force testing position forms a loading position; the fixing fixture is slidably arranged on the first track, and the first linear drive mechanism is used to drive the fixing fixture to move back and forth between the loading position and the pulling force testing position.

Description

Technical Field

[0001] The present invention relates to the field of workpiece pulling force detection, in particular to a pulling force detection machine. Background Art

[0002] In the workpiece assembly process, after the workpiece is assembled, in order to check whether the assembled workpiece meets the relevant requirements, it is often necessary to perform a pull-out force test on the assembled workpiece to ensure the assembly firmness of the workpiece and prevent defects after shipment. Assembled workpieces that require pull-out force testing are, for example, workpieces formed by bonding, workpieces formed by welding, etc., and therefore, some pull-out force testing mechanisms for pull-out force testing have been derived. The traditional pull-out force testing mechanism mainly includes a pull-out force mechanism containing a tensile gauge. The pull-out force mechanism is installed above the workbench, and a lifting mechanism for raising and lowering the pull-out force mechanism is provided on the workbench, and a clamp is provided below the pull-out force mechanism. When performing the pull-out force test, the workpiece is fixed as a whole on the workbench at a position directly below the pull-out force mechanism, so that the clamp clamps the assembly assembled on the workpiece, and the pull-out force mechanism moves upward to tighten the assembly. The tensile gauge is used to determine whether the assembled workpiece meets the relevant firmness requirements, thereby completing the pull-out force test of the assembled workpiece. However, this traditional pulling force detection mechanism has the following defects: since it is necessary to ensure that the pulling force mechanism can clamp the workpiece when it is downward, the fixing mechanism for fixing the workpiece on the workbench must be located directly below the pulling force mechanism, and after fixing the workpiece, the assembly of the workpiece must be located directly below the clamping part to ensure that the clamping part effectively clamps the workpiece when it is downward. As a result, the workpiece must be fixed directly below the pulling force mechanism during installation, which makes installation and disassembly (loading and unloading) extremely inconvenient. Generally, the pulling force mechanism and its related installation components and frames occupy a large space, resulting in less space for loading and unloading the workpiece, which is time-consuming and labor-intensive. If a larger installation space needs to be reserved, the up and down stroke of the pulling force mechanism needs to be increased, so that the pulling force mechanism is placed high above the workbench, which prolongs the up and down time of the pulling force mechanism. In the case of a pulling force mechanism with the same structure, the manufacturing cost and detection time are increased. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a pull-out force testing machine that is convenient for installing the assembled workpiece to be tested and improves the testing efficiency.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: providing a pulling force testing machine for performing pulling force testing on an assembled workpiece, the assembled workpiece including a workpiece body and an assembly assembled on the workpiece body, the pulling force testing machine including a workbench, a fixing fixture arranged on the workbench for fixing the assembled workpiece, and a pulling force testing mechanism arranged on the workbench for performing pulling force testing on the assembled workpiece on the fixing fixture, and also including a first track and a first linear drive mechanism arranged on the workbench along a first direction; a portion of the first track is located below the pulling force testing mechanism to form a pulling force testing position, and another portion of the first track outside the pulling force testing position forms a loading position; the fixing fixture is slidably arranged on the first track, and the first linear drive mechanism is used to drive the fixing fixture to move back and forth between the loading position and the pulling force testing position.

[0005] Furthermore, it also includes a pressing die set arranged on the workbench corresponding to the pulling force detection position, and the pressing die set is used to press the assembled workpiece on the fixed fixture located at the pulling force detection position. The pressing die set includes two lifting mechanisms respectively arranged on both sides of the pulling force detection position and a pressure plate connected to the vertical output shafts of the two lifting mechanisms and located above the fixed fixture, and an avoidance through hole is formed on the pressure plate at the position corresponding to the assembly part.

[0006] Furthermore, the first track, the fixed fixture, the first linear drive mechanism, the pulling force detection mechanism and the pressing die are each two groups, and the two groups of first tracks are arranged side by side on the workbench along a second direction perpendicular to the first direction. The two groups of first linear drive mechanisms are respectively used to drive the two groups of fixed fixtures to move on the corresponding first tracks to switch between the loading position and the pulling force detection position, and the two groups of pulling force detection mechanisms are respectively used to perform pulling force detection on the assembled workpieces located at the two pulling force detection positions.

[0007] Furthermore, the fixing fixture includes a fixing seat slidably arranged on the first track, a first clamping mechanism arranged on the fixing seat to clamp the assembled workpiece from a first direction, and a second clamping mechanism arranged on the fixing seat to clamp the assembled workpiece from a second direction perpendicular to the first direction.

[0008] Furthermore, the first clamping mechanism includes a first reference stop formed on a first side of the fixed seat, a first push block arranged on a second side of the fixed seat in a relative manner, and a first push portion for driving the first push block to move toward and return to the first reference stop; the second clamping mechanism includes a second reference stop formed on a third side of the fixed seat adjacent to the first side, a second push block arranged on a fourth side of the fixed seat in a relative direction, and a second push portion for driving the second push block to move toward and return to the second reference stop.

[0009] Furthermore, the fixing seat is provided with a detection unit for detecting whether there is an assembled workpiece on the fixing seat, and the detection unit is electrically connected to a control unit.

[0010] Furthermore, the fixing seat has an internal cavity, and a first opening is formed on the upper side of the fixing seat for connecting the internal cavity with the outside world. A vacuum adsorption component for adsorbing the assembled workpiece is provided at the first opening. A pipe is provided in the internal cavity, one end of which is connected to the vacuum adsorption component and the other end is connected to the vacuum generating device. The vacuum generating device is electrically connected to the control unit, and the control unit is also electrically connected to the first clamping mechanism, the second clamping mechanism, the first linear drive mechanism and the pulling force detection mechanism.

[0011] Furthermore, the assembly member is a first adhesive member adhered to the upper side of the workpiece body, the first adhesive member comprises a first adhesive block adhered to the upper side of the workpiece body and a first elongated convex strip formed on the upper side of the first adhesive block; when the assembled workpiece is placed on the fixing fixture, the length direction of the first elongated convex strip is consistent with the length direction of the first track, and the cross-section of the first elongated convex strip is waist-shaped with a middle width smaller than the widths of the upper and lower ends;

[0012] The pulling force detection mechanism is arranged at a position on the workbench corresponding to the pulling force detection position, and the pulling force detection mechanism, the pulling force detection position and the loading position are arranged in sequence along the first direction. The pulling force detection mechanism includes a mounting platform arranged on the workbench, a second track arranged on the mounting platform along the first direction, a first vertical lifting mechanism slidably arranged on the second track and the number of which corresponds to the first adhesive members, a first pulling force detection assembly arranged at the lower end of the first vertical lifting mechanism, and a second linear drive mechanism for driving the first vertical lifting mechanism to move to the pulling force detection position and return to the position along the first direction. The first pulling force detection assembly includes a first tensile gauge arranged at the lower end of the first vertical lifting mechanism and a first clamping member connected to the first tensile gauge. The first clamping member has a first clamping arm and a second clamping arm. A first clamping space is defined between the first clamping arm and the second clamping arm, and the first clamping space is defined between the first clamping arm and the second clamping arm, and the first clamping gap is defined between the lower ends of the first clamping arm and the second clamping arm, and the width of ...

[0013] Furthermore, the assembly also includes a second adhesive member adhered to the workpiece body, the second adhesive member includes a second adhesive block adhered to the upper side of the workpiece body, a second elongated convex strip formed on the upper side of the second adhesive block, and a U-shaped clamping member, the cross-section of the second elongated convex strip is a waist shape with a middle width smaller than the widths of the upper and lower ends, the U-shaped clamping member is clamped to the waist with smaller middle width along the length direction of the second elongated convex strip, and when the assembled workpiece is placed on the fixing fixture, the U-shaped clamping member has a portion extending beyond the second elongated convex strip in the direction of the pulling force detection mechanism;

[0014] The pulling force detection mechanism also includes a second vertical lifting mechanism slidably arranged on the second track and the number of which corresponds to the second adhesive members, and a second pulling force detection assembly arranged at the lower end of the second vertical lifting mechanism. The second pulling force detection assembly includes a second force gauge arranged at the lower end of the second vertical lifting mechanism and a second clamping member connected to the second force gauge. The second clamping member has a third clamping arm and a fourth clamping arm. A second clamping space is provided between the third clamping arm and the fourth clamping arm for the portion of the U-shaped clip extending beyond the second elongated protrusion to be placed therein. A second clamping gap is provided between the lower ends of the third clamping arm and the fourth clamping arm, the width of which is smaller than the width of the U-shaped clip.

[0015] Furthermore, the first clamping member and the second clamping member each include a floating mounting seat, the floating mounting seat including a fixed mounting seat fixedly connected to the corresponding tensile gauge and a floating seat provided at the lower end of the fixed mounting seat, the fixed mounting seat being provided with a slide groove along the second direction and passing through the fixed mounting seat downward, the two ends of the slide groove being blocked by blocking blocks, the inner sides of the two blocking blocks being provided with elastic members, the floating seat having a floating portion arranged in the slide groove and a clamping arm mounting portion extending downward from the floating portion out of the slide groove, the two ends of the floating portion being connected to the corresponding elastic members, the two clamping arms of the first clamping member and the second clamping member being respectively arranged on both sides of the lower end of the corresponding clamping arm mounting portion; the U-shaped clip is made of a metal material with magnetic properties, and a mounting cavity is formed at the lower end of the clamping arm mounting portion corresponding to the second adhesive member, the mounting cavity is located above the second clamping space, and a second opening communicating with the second clamping space is formed at the bottom of the mounting cavity, and a magnetic member for generating magnetism for the U-shaped clip is provided in the mounting cavity.

[0016] The pull-out force testing machine of the present invention has the following beneficial effects: First, the loading position and the pull-out force testing position are separately set, and the loading position and the pull-out force testing mechanism are offset in the horizontal direction. Through the designed first track and first linear drive mechanism, the fixed fixture is located at the loading position during loading and moves to the pull-out force testing position during testing. There is no obstruction above the loading position during loading, which facilitates loading and unloading of workpieces and improves loading and unloading efficiency. Second, through the electrical connection of the detection unit, the control unit, the first clamping mechanism, the second clamping mechanism, the first linear drive mechanism, the second linear drive mechanism, the first vertical lifting mechanism, and the second vertical lifting mechanism, the linkage from loading to testing to returning is realized, thereby improving the degree of automation of the pull-out force testing mechanism, reducing the frequency of manual operation, and saving manpower. Third, the dual-station design with dual loading positions and dual pull-out force testing positions exponentially improves the efficiency of pull-out force testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a structural diagram of an electronic device casing.

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the first adhesive member.

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the second adhesive member.

[0021] Figure 4It is a structural schematic diagram of an embodiment of a pull-out force testing machine of the present invention.

[0022] Figure 5 yes Figure 4 Schematic diagram of the structure of the pull-out force detection device.

[0023] Figure 6 yes Figure 5 Schematic diagram of the structure of the fixed fixture.

[0024] Figure 7 yes Figure 5 Schematic diagram of the structure of the medium-voltage module assembly.

[0025] Figure 8 yes Figure 5 Schematic diagram of the structure of the pull-out force detection mechanism.

[0026] Figure 9 yes Figure 5 Assembly drawing of the first vertical lifting mechanism and the first pulling force detection component.

[0027] Figure 10 yes Figure 9 Cross-sectional view of CC.

[0028] Figure 11 yes Figure 10 Enlarged view of the part B1 in the middle.

[0029] Figure 12 yes Figure 10 Enlarged view of the part B2 in the middle.

[0030] Figure 13 yes Figure 5 The second vertical lifting mechanism and the second pulling force detection component are assembled.

[0031] Figure 14 yes Figure 13 Enlarged view of the part B3 in the middle.

[0032] Electronic device housing A; housing body A1; first adhesive member A2; first adhesive block A21; first elongated ridge A22; second adhesive member A3; second adhesive block A31; second elongated ridge A32; U-shaped clip A33;

[0033] Rack-100; Control box-110; Workbench-101; Control box door-102; Protective baffle-120; Safety light curtain-130;

[0034] Pull-out force detection device 200a, 200b; first track 210; pull-out force detection mechanism 220; mounting platform 221; first side frame 221a; second side frame 221b; platform 221c; second track 222; first vertical lift mechanism 223; side plate 2231; linear module 2232; drive motor 2233; third track 2234; sliding block 2235; first pull-out force detection assembly 224; first dynamometer -2241; first floating mounting seat -2242; first fixed mounting seat -2242a; first blocking block -2242b; first elastic member -2242c; first floating portion -2242d; first clamping arm mounting portion -2242e; first clamping member -2243; first clamping arm -2243a; second clamping arm -2243b; first clamping space -2243c; first clamping gap -2243d; second vertical lifting mechanism -225; second pulling force detection Assembly 226; second linear drive mechanism 227; sliding base 228; mounting plate 229; second dynamometer 2261; second floating mounting seat 2262; second clamping member 2263; third clamping arm 2263a; fourth clamping arm 2263b; second clamping space 2263c; second clamping gap 2263d; fixing fixture 230; fixing seat 231; groove 231a; first clamping mechanism 232; first reference stop Part-232a; first push block-232b; second clamping mechanism-233; second reference stop-233a; second push block-233b; vacuum adsorption assembly-234; detection unit-235; first linear drive mechanism-240; pressing module-250; lifting mechanism-251; pressing plate-252; avoidance through hole-252a; large chamfer-252b; mounting plate-253; vertical guide rod-254; linear bearing-255; height limit plate-256. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] The pull-out force testing machine of the present invention is described in detail by taking the assembled workpieces bonded together as an example. It should be understood that the pull-out force testing machine of the present invention is not limited to testing the pull-out force of assembled workpieces bonded together, but is also applicable to other assembled workpieces. Figures 1 to 3 In this specific embodiment, the assembly workpiece is specifically described by taking an electronic device housing A bonded together as an example. The electronic device housing A includes a housing body A1 (i.e., the workpiece body) having a rectangular plate-like structure, two first adhesive members A2 bonded to the upper side of the housing body A1, and two second adhesive members A3 bonded to the upper side of the housing body A1. It should be noted that the upper side of the housing body A1 here refers to the side facing upward when the electronic device housing A is undergoing a pull-out force test. The first adhesive member A2 includes a first adhesive block A21 bonded to the upper side of the housing body A1 and a first elongated ridge A22 formed on the upper side of the first adhesive block A21. The cross-section of the first elongated ridge A22 is waist-shaped, with the middle width being smaller than the widths at the upper and lower ends. The second adhesive component A3 includes a second adhesive block A31 adhered to the upper side of the shell body A1, a second elongated ridge A32 formed on the upper side of the second adhesive block A31, and a U-shaped clip A33. The cross-section of the second elongated ridge A32 is waist-shaped with a smaller width in the middle than at the upper and lower ends. The U-shaped clip A33 is made of a magnetic metal material. The U-shaped clip A33 is clamped to the waist with a smaller width in the middle along the length direction of the second elongated ridge A32. The U-shaped clip A33 has a portion that extends beyond one end of the second elongated ridge A32. It should be understood that the above-mentioned example structure exists only to more clearly illustrate the pull-out force testing machine of this specific embodiment. The shape and structure of the assembled workpiece are not limited to the structure described above. In different embodiments, different assembled workpieces correspond to different workpiece bodies and assembly parts.

[0039] See also Figure 4 and Figure 5In this embodiment, the pull-out force testing machine performs pull-out force testing on an electronic device housing A. The pull-out force testing machine is a double-station pull-out force testing machine, comprising a workbench 101 and two pull-out force testing devices 200a and 200b arranged in parallel along a second direction. The two pull-out force testing devices 200a and 200b each comprise a first track 210 arranged on the workbench 101 along a first direction perpendicular to the second direction, a pull-out force testing mechanism 220 arranged at one end (e.g., the rear end) of the first track 210, a fixing fixture 230 slidably mounted on the first track 210, a first linear drive mechanism 240 for driving the fixing fixture 230 to move on the first track 210, and a pressing die set 250. A portion of the first track 210 (near the rear end of the pull-out force detection mechanism 220) is located below the pull-out force detection mechanism 220 to form a pull-out force detection position. Another portion of the first track 210 located outside the pull-out force detection position (away from the front end of the pull-out force detection mechanism 220) forms a loading position. The first linear drive mechanism 240 is used to drive the fixed fixture 230 to move back and forth between the loading position and the pull-out force detection position so that the fixed fixture 230 can switch between the loading position and the pull-out force detection position, thereby allowing the fixed fixture 230 to be located at the loading position and the pull-out force detection position. The pressing module 250 is mounted above the pull-out force detection position to press the electronic device housing A (i.e., the assembled workpiece) against the fixed fixture 230 located at the pull-out force detection position. The pull-out force detection mechanism 220 is used to perform pull-out force testing on the assembled workpiece located at the pull-out force detection position.

[0040] In this embodiment, the pull-out force testing machine comprises two sets of first rails 210, a pull-out force testing mechanism 220, a fixture 230, a first linear drive mechanism 240, and a pressing die 250. The two sets of first rails 210 are arranged side by side on the workbench 101 along a second direction perpendicular to the first direction. The two sets of first linear drive mechanisms 240 are respectively used to drive the two sets of fixtures 230 to move along their corresponding first rails 210, switching between the loading position and the pull-out force testing position. The two sets of pull-out force testing mechanisms 220 are respectively used to perform pull-out force testing on electronic device housings A located at the two pull-out force testing positions. This allows for simultaneous pull-out force testing of two electronic device housings A, exponentially improving testing efficiency. It should be understood that in other embodiments, the pull-out force testing machine may be designed with only a single station or multiple stations. When a single station is used, one pull-out force testing device is provided on the workbench 101. When a multi-station system is used, a corresponding number of pull-out force testing devices are employed. It should also be understood that the positional relationship between the pull-out force detection mechanism 220 and the first rail 210 is not limited to the positional relationship described above (i.e., it is not limited to the pull-out force detection mechanism 220 being located at the rear end of the first rail 210). For example, in some embodiments, the pull-out force detection mechanism 220 can also be swapped with the first rail 210 so that the pull-out force detection mechanism 220 is located at the front end of the first rail 210. For another example, in some embodiments, the pull-out force detection mechanism 220 is located in the middle section of the first rail 210. It should also be understood that the pressing module 250 is not a necessary technical component. The pressing module 250 is mainly used to cooperate with the pull-out force detection mechanism 220 to generate opposing forces. That is, the pressing module 250 generates downward pressure, and the pull-out force detection mechanism 220 generates upward pulling force, effectively ensuring that the assembled workpiece does not separate from the fixing fixture 230 due to the pulling force of the pull-out force detection mechanism 220. In some embodiments, if the required tensile force to be tested is not significant or if the fixture 230 securely secures the assembled workpiece, the pressing module 250 can be omitted. The first and second directions described above are both perpendicular to each other on a horizontal plane. In this embodiment, the first direction is the front-to-back direction (also referred to as the Y direction or longitudinal direction), and the second direction is the left-to-right direction (also referred to as the X direction or transverse direction). In other embodiments, the first and second directions can be opposite to each other or any two perpendicular directions on a horizontal plane.

[0041] The pulling force testing machine in this embodiment is configured by arranging a first rail 210 and a first linear drive mechanism 240 on the workbench 101, so that the rear end of the first rail 210 is located directly below the pulling force testing mechanism 220 and the front end is located in front of the pulling force testing mechanism 220, so that the fixed fixture 230 is slidably arranged on the first rail 210 so as to be able to switch between the pulling force testing position and the loading position. When loading is required, the fixing jig 230 is moved to the loading position so that the electronic device housing A can be placed on the fixing jig 230. After loading is completed, the fixing jig 230 can be moved to the pull-out force detection position. After moving to the pull-out force detection position, the pressing module 250 presses the housing body A1 downward to expose the adhesive. After the pressing is completed, the pull-out force detection mechanism 220 moves downward to clamp the adhesive and then moves upward. During this process, the tensile force gauge of the pull-out force detection mechanism 220 displays the tensile force value. According to the tensile force value, it is determined whether the bonding strength of the assembly meets the requirements. If it meets the requirements, it is regarded as effective bonding and the assembled workpiece is a good product. By adopting such a design structure, the traditional fixing fixture 230 is fixedly arranged directly below the pulling force detection mechanism 220, and the loading position is staggered with the pulling force detection mechanism 220 in the horizontal projection, that is, the loading position is not located directly below the pulling force detection mechanism 220. This solves the problems of inconvenient loading and unloading, time-consuming and labor-intensive loading and unloading in traditional technologies, improves the loading and unloading efficiency, and further improves the detection efficiency of the pulling force detection machine.

[0042] The pull-out force testing machine also includes a frame 100, with a control box 110 disposed at the bottom of the frame 100. The control box 110 houses a control unit or device that controls the operation of the pull-out force testing machine. A control box door 102 is provided on the front side of the control box 110 to facilitate inspection of the units or devices within the control box 110. The top surface of the control box 110 forms the workbench 101, and the two pull-out force testing devices 200a and 200b are spaced apart along the second direction on the workbench 101 formed on the top surface of the control box 110. The front side of the workbench 101 serves as the operating side, and all sides of the workbench 101, except the operating side, are surrounded by protective shields 120. Control buttons are provided on the top side of the protective shields 120 for controlling the operation of corresponding components (e.g., a start / stop button, a control button for moving the fixture 230, etc.). A safety light curtain 130 is provided on the protective shield 120 located on the operating side.

[0043] The first track 210 is a double track arranged on the workbench 101 along the first direction, the fixed fixture 230 is connected to the slider on the double track, and the first linear drive mechanism 240 is arranged on the workbench 101 and is located between the double tracks. The first linear drive mechanism 240 can be a cylinder, a push rod motor, or a motor and screw rod matching structure (linear module). The first linear drive mechanism 240 is electrically connected to a control unit (not shown) and can push the fixed fixture 230 to move along the first direction under the control of the control unit.

[0044] See also Figure 6 The fixing fixture 230 includes a fixing seat 231 slidably mounted on the first rail 210, a first clamping mechanism 232 mounted on the fixing seat 231 to clamp the assembly workpiece from a first direction, and a second clamping mechanism 233 mounted on the fixing seat 231 to clamp the assembly workpiece from a second direction perpendicular to the first direction. The fixing seat 231 is a cubic structure having an internal cavity. A first opening is formed on the upper side of the fixing seat 231 for connecting the internal cavity with the outside world. A vacuum adsorption component 234 for adsorbing the assembly workpiece is provided at the first opening. A pipe (not shown) is provided in the internal cavity, one end of which is connected to the vacuum adsorption component 234 and the other end is connected to a vacuum generating device. The vacuum adsorption component 234 can be a vacuum suction cup. The upper side of the fixing seat 231 is also provided with a number of support blocks made of non-metallic materials with a predetermined hardness to prevent the electronic device housing A from being damaged (i.e., scratched, crushed, or bumped). The upper side of the fixing seat 231 is further formed with a groove 231a, in which a detection unit 235 is provided for detecting whether there is an assembled workpiece on the fixing seat 231. The detection end of the detection unit 235 faces upward. The detection unit 235 can be a photoelectric detection unit, an infrared detection unit, etc.

[0045] The first clamping mechanism 232 includes a first reference stop 232a formed on a first side of the fixed seat 231, a first push block 232b disposed oppositely on a second side of the fixed seat 231, and a first pusher (not shown) for driving the first pusher 232b to move toward and return to the first reference stop 232a. The second clamping mechanism 233 includes a second reference stop 233a formed on a third side of the fixed seat 231 adjacent to the first side, a second push block 233b disposed oppositely on a fourth side of the fixed seat 231, and a second pusher (not shown) for driving the second pusher 233b to move toward and return to the second reference stop 233a. The first reference stop 232a and the second reference stop 233a are both stoppers protruding from the upper side of the fixed seat 231 and located at the edge of the fixed seat 231. The first pushing part and the second pushing part can both be a cylinder, a hydraulic cylinder, an electric push rod, etc. The first pushing part and the second pushing part can both be arranged in the internal cavity of the fixed seat 231, and their pushing rods (such as piston rods or push rods) can move toward the direction of the corresponding push block and pass through the fixed seat 231 to connect with the corresponding push block.

[0046] The detection unit 235, the vacuum generating device, the first clamping mechanism 232, the second clamping mechanism 233, the first linear drive mechanism 240, and the pull-out force detection mechanism 220 are all electrically connected to the control unit, thereby enabling the following automated control: when the electronic device housing A is placed on the fixing seat 231, the detection unit 235 sends a signal to the control unit. The control unit can control the first and second pushing portions of the first and second clamping mechanisms 232, 233 to move toward each other to clamp the electronic device housing A based on the signal, and then cause the first linear drive mechanism 240 to pull the fixing seat 231 backward to the pull-out force detection position. A signal indicating that the fixing seat 231 has moved to the pull-out force detection position is obtained based on a preset travel distance or based on a travel switch / proximity switch / sensor provided at the pull-out force detection position. When the fixing seat 231 is moved into position, the first linear drive mechanism 240 stops operating, and the control unit causes the pull-out force detection mechanism 220 to move downward to clamp the adhesive member and lift it upward, thereby performing a pull-out force test on the adhesive member. It should be understood that the above automatic control process is intended to improve control automation, reduce manual operation, and make control more precise. In some embodiments, control can also be achieved by designing various start / stop buttons (such as an up / down button for the pulling force detection mechanism 220 or a main switch button to start / stop the pulling force detection mechanism 220).

[0047] See also Figure 7The pressing module 250 is used to press the assembled workpiece onto the fixed fixture 230 located at the pulling force detection position. The pressing module 250 includes two lifting mechanisms 251 respectively arranged on both sides of the pulling force detection position and a pressure plate 252 connected to the vertical output shafts of the two lifting mechanisms 251 and located above the fixed fixture 230. The pressure plate 252 is formed with an avoidance through hole 252a at the position corresponding to the assembly. The lifting mechanism 251 can be a lifting cylinder, a push rod motor, a hydraulic cylinder, etc. A mounting plate 253 for mounting the lifting mechanism 251 is provided on the workbench 101. Vertical guide rods 254 are provided at both ends of the mounting plate 253. The lifting mechanism 251 is installed on the mounting plate 253 at a position between the two vertical guide rods 254. A linear bearing 255 is provided on the pressure plate 252 at a position corresponding to the vertical guide rod 254. The vertical guide rod 254 is inserted into the linear bearing 255 and connected to a height limit plate 256 at its upper end. The height limit plate 256 is used to limit the height of the pressure plate 252. The shape, position, and number of the avoidance holes 252a correspond one-to-one with the adhesive members (first adhesive member A2 and second adhesive member A3). A chamfer 252b is formed between the upper edge of the avoidance holes 252a and the upper side of the pressure plate 252, which facilitates the inspection of the clamping assembly of the pull-out force detection mechanism 220 during debugging. A contoured protective member (e.g., contoured rubber) is attached to the lower side of the pressure plate 252 at a position corresponding to the avoidance holes 252a. This member is used to protect the electronic device housing A from being crushed when the pressure plate 252 presses the electronic device housing A against the fixing fixture 230.

[0048] See also Figure 8 、 Figure 9 and Figure 13The pull-out force detection mechanism 220 is disposed on the workbench 101 at a position corresponding to the pull-out force detection position. The pull-out force detection mechanism 220 is located at the rear end of the first track 210. The pull-out force detection mechanism 220, the pull-out force detection position, and the loading position are sequentially arranged along the first direction (arranged from back to front). Since the first adhesive member A2 and the second adhesive member A3 in this specific embodiment are both elongated convex strips with a waist-shaped structure that is narrow in the middle and wide at the upper and lower ends, in order to facilitate the pull-out force detection mechanism 220 to quickly pull the first adhesive member A2 and the second adhesive member A3, the pull-out force detection mechanism 220 is capable of moving back and forth along the corresponding elongated convex strips to facilitate rapid clamping of the elongated convex strips. Specifically, the pulling force detection mechanism 220 includes a mounting platform 221 arranged on the workbench 101, a second track 222 arranged on the mounting platform 221 along a first direction, a first vertical lifting mechanism 223 slidably arranged on the second track 222 and the number of which corresponds to the first adhesive parts A2, a first pulling force detection component 224 arranged at the lower end of the first vertical lifting mechanism 223, a second vertical lifting mechanism 225 slidably arranged on the second track 222 and the number of which corresponds to the second adhesive parts A3, a second pulling force detection component 226 arranged at the lower end of the second vertical lifting mechanism, and a second linear drive mechanism 227 for driving the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 to move forward to the pulling force detection position and return to the position.

[0049] The mounting platform 221 is positioned on the workbench 101, behind the first track 210. The mounting platform 221 comprises a first side frame 221a and a second side frame 221b spaced apart along the second direction, and a platform 221c mounted on the first and second side frames 221a, 221b. The first linear drive mechanism 240 is positioned below the platform 221c, its front end connected to the fixture 230 and its rear end fixed to the workbench 101. The second track 222 comprises a pair of parallel tracks spaced apart along the second direction. A sliding base plate 228 slidably engages the dual tracks. A mounting plate 229, for mounting the first and second vertical lift mechanisms 223, 225, is positioned at its front edge. The first and second vertical lift mechanisms 223, 225 are spaced apart along the second direction on the front side of the mounting plate 229. The second linear drive mechanism 227 can also be driven by a pneumatic cylinder, a hydraulic cylinder, or a motor. In this specific embodiment, the second linear drive mechanism 227 includes a drive motor arranged at the rear end of the table 221c and a screw rod arranged between the double rails along the first direction and connected to the output shaft of the drive motor, and the sliding base plate 228 is connected to the slider and screw nut of the double slide rails.

[0050] See also Figures 9 to 12 The first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 have the same or similar structure or function, and both include a side plate 2231 disposed on the front side of the mounting plate 229, a linear module 2232 disposed vertically on the side plate 2231, a drive motor 2233 disposed above the linear module 2232 and used to drive the linear module 2232 to perform linear motion, a third rail 2234 disposed on the front side of the side plate 2231 and parallel to the linear module 2232, and a sliding block 2235 slidably connected to the linear module 2232 and the third rail 2234. The first pulling force detection assembly 224 and the second pulling force detection assembly 226 are respectively disposed on the sliding blocks 2235 of the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225.

[0051] The first pulling force detection assembly 224 includes a first force gauge 2241 disposed at the lower end of the first vertical lifting mechanism 223, a first floating mounting base 2242 disposed at the lower end of the first force gauge 2241, and a first clamping member 2243 connected to the first force gauge 2241 via the first floating mounting base 2242. The upper end of the first force gauge 2241 is connected to the lower end of the sliding block 2235 of the first vertical lifting mechanism 223, and the lower end is connected to the first floating mounting base 2242. The first floating mounting seat 2242 includes a first fixed mounting seat 2242a fixedly connected to the first tension gauge 2241 and a first floating seat arranged at the lower end of the first fixed mounting seat 2242a. The first fixed mounting seat 2242a is provided with a first sliding groove along the second direction and downwardly passing through the first fixed mounting seat 2242a. The two ends of the first sliding groove are respectively blocked by first blocking blocks 2242b. The inner sides of the two first blocking blocks 2242b are respectively provided with first elastic members 2242c (the first elastic members 2242c can be coil springs). The first floating seat has a first floating portion arranged in the first sliding groove and a first clamping arm mounting portion 2242e extending downward from the first floating portion 2242d. The two ends of the first floating portion 2242d are connected to the corresponding first elastic members 2242c. The first clamping member 2243 includes a first clamping arm 2243a and a second clamping arm 2243b. The first clamping arm 2243a and the second clamping arm 2243b are spaced apart along the second direction on either side of the lower end of the first clamping arm mounting portion 2242e. A first clamping space 2243c is defined between the first clamping arm 2243a and the second clamping arm 2243b, the width of which matches the upper end width of the first elongated protrusion A22. A first clamping gap 2243d is defined between the lower ends of the first clamping arm 2243a and the second clamping arm 2243b, the width of which matches the middle width of the first elongated protrusion A22.

[0052] See also Figure 13 and Figure 14The second pull-out force detection assembly 226 includes a second force gauge 2261 disposed at the lower end of the second vertical lifting mechanism 225, a second floating mounting base 2262 disposed at the lower end of the second force gauge 2261, and a second clamping member 2263 connected to the second force gauge 2261 via the second floating mounting base 2262. The upper end of the second force gauge 2261 is connected to the lower end of the sliding block 2235 of the second vertical lifting mechanism 225, and the lower end is connected to the second floating mounting base 2262. The second floating mount 2262 includes a second fixed mount fixedly connected to the second force gauge 2261 and a second floating mount located at the lower end of the second fixed mount. The second fixed mount is provided with a second slot extending downwardly along a second direction through the second fixed mount. The second slot is blocked by a second blocking block at each end. The inner surfaces of the two second blocking blocks are each provided with a second elastic member (the first elastic member 2242c may be a coil spring). The second floating mount has a second floating portion located within the second slot and a second clamping arm mounting portion extending downwardly from the second floating portion. The second floating portion is connected to the corresponding second elastic member at each end. The structures and functions of the second force gauge 2261, the second floating mount 2262, and the second clamping member 2263 are the same or similar to those of the first force gauge, the first floating mount, and the first clamping member 2243.

[0053] The second clamping member 2263 includes a third clamping arm 2263a and a fourth clamping arm 2263b, which are spaced apart along the second direction on either side of the second clamping arm mounting portion. A second clamping space 2263c is defined between the third clamping arm 2263a and the fourth clamping arm 2263b, allowing the portion of the U-shaped clamping member A33 extending beyond the second elongated protrusion A32 to be positioned therein. A second clamping gap 2263d, whose width is smaller than that of the U-shaped clamping member A33, is defined between the lower ends of the third clamping arm 2263a and the fourth clamping arm 2263b. In this embodiment, in order to prevent the U-shaped clamp A33 from shifting, an installation cavity 2264 is further formed at the lower end of the second clamping arm installation portion, and the installation cavity 2264 is located above the second clamping space 2263c, and a second opening connected to the second clamping space 2263c is formed at the bottom of the installation cavity 2264, and a magnetic part (not shown in the figure) for generating magnetism for the U-shaped clamp A33 is provided in the installation cavity 2264.

[0054] The structures of the first clamping member 2243 and the second clamping member 2263 are primarily designed based on the specific structures of the first adhesive member A2 and the second adhesive member A3 in this embodiment. This design facilitates their efficient and quick clamping of the corresponding adhesive members. It should be understood that the clamping member structures can be adapted to accommodate the different assembly structures in different embodiments. Furthermore, the forward and backward movement of the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 is also designed to accommodate the elongated ridges in this embodiment. This forward and backward movement eliminates the need for each clamping arm to be designed as a mechanical arm capable of opening and closing, allowing the clamping arms to be fixed. This forward and backward movement allows the clamping arms to passively move the elongated ridges into their corresponding clamping spaces. Furthermore, the clamping gap between the lower ends of the clamping arms is smaller than the width of the elongated ridges and the U-shaped clamping member A33. This effectively prevents the clamped member (elongated ridges and U-shaped clamping member A33) from detaching due to excessive tension.

[0055] The working principle of the pull-out force testing machine of the present invention is as follows: first, the electronic device housing A is placed on the fixed fixture 230 at the front loading position, so that the first clamping mechanism 232 and the second clamping mechanism 233 respectively clamp the electronic device housing A. At this time, the length direction of the long ridge on the electronic device housing A is consistent with the first direction, and the U-shaped clamp A33 extends beyond the second long ridge A32 in the direction of the pull-out force testing mechanism 220 (rear); secondly, the first linear drive mechanism 240 pulls the fixed fixture 230 backward to the pull-out force testing position; thirdly, the second linear drive mechanism 227 drives the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 to move forward, so that the first The clamping arm 2243a and the second clamping arm 2243b move from back to front to the positions on both sides of the waist of the first elongated ridge A22, and at the same time, the third clamping arm 2263a and the fourth clamping arm 2263b move from back to front to both sides of the U-shaped clamp A33; then, the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 pull the first elongated ridge A22 and the U-shaped clamp A33 upward until the pulling force test is completed; finally, the first vertical lifting mechanism 223 and the second vertical lifting mechanism 225 move downward to their positions and then move backward, thereby disengaging from the first elongated ridge A22 and the U-shaped clamp A33, and returning the fixing fixture 230 to the loading position, unloading the electronic device housing A, and completing this round of pulling force test.

[0056] The pull-out force testing machine of the present invention has the following beneficial effects: First, the loading position and the pull-out force testing position are separately set, and the loading position and the pull-out force testing mechanism are offset in the horizontal direction. Through the designed first track and first linear drive mechanism, the fixed fixture is located at the loading position during loading and moves to the pull-out force testing position during testing. There is no obstruction above the loading position during loading, which facilitates loading and unloading of workpieces and improves loading and unloading efficiency. Second, through the electrical connection of the detection unit, the control unit, the first clamping mechanism, the second clamping mechanism, the first linear drive mechanism, the second linear drive mechanism, the first vertical lifting mechanism, and the second vertical lifting mechanism, the linkage from loading to testing to returning is realized, thereby improving the degree of automation of the pull-out force testing mechanism, reducing the frequency of manual operation, and saving manpower. Third, the dual-station design with dual loading positions and dual pull-out force testing positions exponentially improves the efficiency of pull-out force testing.

[0057] The above embodiments merely represent preferred embodiments of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A pull-out force testing machine for testing the pull-out force of an assembled workpiece, wherein the assembled workpiece includes a workpiece body and an assembly assembled on the workpiece body. The pull-out force testing machine comprises a workbench, a fixture disposed on the workbench for fixing the assembled workpiece, and a pull-out force testing mechanism disposed on the workbench for testing the pull-out force of the assembled workpiece on the fixture, wherein: The device further comprises a first track and a first linear drive mechanism provided on the workbench along a first direction; a portion of the first track is located below the pulling force detection mechanism to form a pulling force detection position, and another portion of the first track outside the pulling force detection position forms a loading position; the fixed fixture is slidably provided on the first track, and the first linear drive mechanism is used to drive the fixed fixture to reciprocate between the loading position and the pulling force detection position; The assembly member is a first adhesive member adhered to the upper side of the workpiece body, the first adhesive member having a first adhesive block adhered to the upper side of the workpiece body and a first elongated convex strip formed on the upper side of the first adhesive block. When the assembled workpiece is placed on the fixing fixture, the length direction of the first elongated convex strip is consistent with the length direction of the first track. The cross-section of the first elongated convex strip is waist-shaped with a middle width smaller than the widths of the upper and lower ends. The pulling force detection mechanism is arranged at a position on the workbench corresponding to the pulling force detection position, and the pulling force detection mechanism, the pulling force detection position and the loading position are arranged in sequence along the first direction. The pulling force detection mechanism includes a mounting platform arranged on the workbench, a second track arranged on the mounting platform along the first direction, a first vertical lifting mechanism slidably arranged on the second track and the number of which corresponds to the first adhesive members, a first pulling force detection assembly arranged at the lower end of the first vertical lifting mechanism, and a second linear drive mechanism for driving the first vertical lifting mechanism to move to the pulling force detection position and return to the position along the first direction. The first pulling force detection assembly includes a first tensile gauge arranged at the lower end of the first vertical lifting mechanism and a first clamping member connected to the first tensile gauge. The first clamping member has a first clamping arm and a second clamping arm. A first clamping space is defined between the first clamping arm and the second clamping arm, and the first clamping space is defined between the first clamping arm and the second clamping arm, and the first clamping gap is defined between the lower ends of the first clamping arm and the second clamping arm, and the width of ...

2. The pull-out force testing machine according to claim 1, wherein: It also includes a pressing die set arranged on the workbench corresponding to the pulling force detection position, the pressing die set is used to press the assembled workpiece on the fixed fixture located at the pulling force detection position, the pressing die set includes two lifting mechanisms respectively arranged on both sides of the pulling force detection position and a pressure plate connected to the vertical output shafts of the two lifting mechanisms and located above the fixed fixture, and an avoidance through hole is formed on the pressure plate at the position corresponding to the assembly part.

3. The pull-out force testing machine according to claim 2, wherein: The first track, the fixed fixture, the first linear drive mechanism, the pulling force detection mechanism and the pressing die are each two groups, and the two groups of first tracks are arranged side by side on the workbench along a second direction perpendicular to the first direction. The two groups of first linear drive mechanisms are respectively used to drive the two groups of fixed fixtures to move on the corresponding first tracks to switch between the loading position and the pulling force detection position, and the two groups of pulling force detection mechanisms are respectively used to perform pulling force detection on the assembled workpieces located at the two pulling force detection positions.

4. The pull-out force testing machine according to claim 1, wherein: The fixing fixture includes a fixing seat slidably arranged on the first track, a first clamping mechanism arranged on the fixing seat to clamp the assembly workpiece from a first direction, and a second clamping mechanism arranged on the fixing seat to clamp the assembly workpiece from a second direction perpendicular to the first direction.

5. The pull-out force testing machine according to claim 4, characterized in that: The first clamping mechanism includes a first reference stop formed on a first side of the fixed seat, a first push block arranged on a second side of the fixed seat in an opposite manner, and a first push portion for driving the first push block to move toward and return to the first reference stop; the second clamping mechanism includes a second reference stop formed on a third side of the fixed seat adjacent to the first side, a second push block arranged on a fourth side of the fixed seat in an opposite direction, and a second push portion for driving the second push block to move toward and return to the second reference stop.

6. The pull-out force testing machine according to claim 4, characterized in that: The fixing seat is provided with a detection unit for detecting whether there is an assembled workpiece on the fixing seat, and the detection unit is electrically connected to a control unit.

7. The pull-out force testing machine according to claim 6, wherein: The fixing seat has an internal cavity, and a first opening is formed on the upper side of the fixing seat for connecting the internal cavity with the outside world. A vacuum adsorption component for adsorbing the assembled workpiece is provided at the first opening. A pipe is provided in the internal cavity, one end of which is connected to the vacuum adsorption component and the other end is connected to the vacuum generating device. The vacuum generating device is electrically connected to the control unit, and the control unit is also electrically connected to the first clamping mechanism, the second clamping mechanism, the first linear drive mechanism and the pulling force detection mechanism.

8. The pull-out force testing machine according to claim 1, wherein: The assembly also includes a second adhesive member adhered to the workpiece body, the second adhesive member having a second adhesive block adhered to the upper side of the workpiece body, a second elongated convex strip formed on the upper side of the second adhesive block, and a U-shaped clamping member, the cross-section of the second elongated convex strip being in a waist shape with a middle width smaller than the widths of the upper and lower ends, the U-shaped clamping member being clamped to the waist with smaller middle width along the length direction of the second elongated convex strip, and when the assembled workpiece is placed on the fixing fixture, the U-shaped clamping member has a portion extending beyond the second elongated convex strip in the direction of the pulling force detection mechanism; The pulling force detection mechanism also includes a second vertical lifting mechanism slidably arranged on the second track and the number of which corresponds to the second adhesive members, and a second pulling force detection assembly arranged at the lower end of the second vertical lifting mechanism. The second pulling force detection assembly includes a second force gauge arranged at the lower end of the second vertical lifting mechanism and a second clamping member connected to the second force gauge. The second clamping member has a third clamping arm and a fourth clamping arm. A second clamping space is provided between the third clamping arm and the fourth clamping arm for the portion of the U-shaped clip extending beyond the second elongated protrusion to be placed therein. A second clamping gap is provided between the lower ends of the third clamping arm and the fourth clamping arm, the width of which is smaller than the width of the U-shaped clip.

9. The pull-out force testing machine according to claim 8, wherein: The first clamping member and the second clamping member also each include a floating mounting seat, the floating mounting seat including a fixed mounting seat fixedly connected to the corresponding tensile gauge and a floating seat provided at the lower end of the fixed mounting seat, the fixed mounting seat being provided with a sliding groove along the second direction and downwardly passing through the fixed mounting seat, the two ends of the sliding groove being blocked by blocking blocks, the inner sides of the two blocking blocks being provided with elastic members, the floating seat having a floating portion arranged in the sliding groove and a clamping arm mounting portion extending downwardly from the floating portion out of the sliding groove, the two ends of the floating portion being connected to the corresponding elastic members, the two clamping arms of the first clamping member and the second clamping member being respectively arranged on both sides of the lower end of the corresponding clamping arm mounting portion; the U-shaped clip is made of a metal material with magnetic properties, and a mounting cavity is formed at the lower end of the clamping arm mounting portion corresponding to the second adhesive member, the mounting cavity is located above the second clamping space, and a second opening communicating with the second clamping space is formed at the bottom of the mounting cavity, and a magnetic member for generating magnetism for the U-shaped clip is provided in the mounting cavity.

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