Force measuring device and force measuring method

Abstract

The invention relates to the technical field of safety detection, in particular to a force measuring device and a force measuring method. The force measuring device comprises a base, a fixing assembly, a transmission assembly, a pressure sensor and a driver. The base is used for being embedded in a groove of a bearing column of a portal frame. The fixing assembly is connected with a movable column of the portal frame; the transmission assembly is connected with the fixing assembly; the pressure sensor is located between the transmission assembly and the fixing assembly, one end of the pressure sensor is connected with the fixing assembly, and the other end abuts against the transmission assembly. The output end of the driver acts on the fixing assembly to drive the fixing assembly, the transmission assembly and the pressure sensor to be close to or away from the base, so that the transmission assembly abuts against the base. According to the force measuring device, the detection precision can be improved.

Description

Technical Field

[0001] This invention relates to the field of safety detection technology, and more specifically, to a force measuring device and a force measuring method. Background Technology

[0002] In fields such as engineering structure testing, industrial product quality control, and scientific research experiments, gantry cranes, with their stable load-bearing capacity, have become the core basic equipment for testing the mechanical properties of various components, materials, and special parts. They are widely used in various scenarios such as rubber spring testing, force wheel calibration, and engine thrust testing.

[0003] Traditional gantry loading and force measurement methods mostly rely on manual operation or simple mechanical loading devices, resulting in low accuracy. Summary of the Invention

[0004] The present invention aims to provide a force measuring device and a force measuring method that can improve the accuracy of detection.

[0005] The embodiments of the present invention can be implemented as follows: In a first aspect, the present invention provides a force measuring device, comprising: The base is used to be embedded in the groove of the support column of the gantry frame; Fixed components are used to connect to the movable columns of the gantry frame; Transmission assembly, which connects to the stationary assembly; A pressure sensor is located between the transmission assembly and the stationary assembly, with one end connected to the stationary assembly and the other end abutting against the transmission assembly; and The driver, whose output acts on the fixed component, moves the fixed component, the transmission component, and the pressure sensor closer to or away from the base, causing the transmission component to come into contact with the base.

[0006] In an optional embodiment, the transmission assembly includes a sleeve, a thrust spherical bearing, and a bearing head, wherein the thrust spherical bearing and the thrust spherical bearing are both housed within the sleeve. The thrust joint bearing is connected to the inner wall of the sleeve; one end of the bearing head abuts against the thrust joint bearing, and the other end abuts against the pressure sensor.

[0007] In an optional embodiment, the fixing component includes a connecting plate and a bolt, the stud of the bolt being connected to the connecting plate, and the nut of the bolt being used to abut against the arched bottom of the movable column; the connecting plate is used to connect to the bottom of the movable column.

[0008] In an optional embodiment, the fixing assembly further includes a cylinder, one end of which is connected to the connecting plate and the other end extends into the sleeve, with the outer wall of the cylinder connected to the inner wall of the sleeve; a portion of the pressure sensor is housed in the cylinder, and another portion extends out of the cylinder and is housed in the sleeve.

[0009] In an optional embodiment, the side wall of the sleeve is provided with a first elongated hole and a second elongated hole; The force measuring device also includes a first connector and a second connector. The first connector passes through the first elongated hole and is connected to the cylinder, and the second connector passes through the second elongated hole and is connected to the thrust joint bearing.

[0010] In an optional embodiment, the connecting plate is provided with multiple threaded holes arranged circumferentially around the axis of the cylinder; the force measuring device also includes a cylindrical head screw, which is connected to the pressure sensor and threadedly connected to the multiple threaded holes.

[0011] In an optional embodiment, the fixing assembly further includes a screw, a nut, and an elastic washer; one end of the screw is connected to the connecting plate, and the other end is used to pass through the movable column of the gantry and is threadedly connected to the nut; the elastic washer is disposed between the nut and the movable column.

[0012] In an optional embodiment, the base includes a main body and a support plate, with the main body connected to the middle of the support plate and used to abut against the transmission assembly; both ends of the support plate are equipped with lifting rings.

[0013] In an optional embodiment, the base further includes two first stiffeners and two second stiffeners, which are connected to the side of the load-bearing plate away from the main body; the two first stiffeners are arranged at intervals along a first direction, and the two second stiffeners are arranged at intervals along a second direction. The first direction and the second direction are perpendicular to each other.

[0014] Secondly, the present invention provides a force measurement method, which uses the aforementioned force measurement device for testing, and the force measurement method includes: Embed the base into the groove of the support column of the gantry frame; Install the fixing components at the bottom of the movable column of the gantry; The transmission components are mounted on the fixed components; Start the driver to move the transmission assembly toward the base until the transmission assembly contacts the base. Continue applying pressure until the force detected by the pressure sensor exceeds a preset threshold; The control transmission assembly separates from the base and resets.

[0015] The beneficial effects of the force measuring device and force measuring method provided in the embodiments of the present invention include: The force measuring device includes a base, a fixing component, a transmission component, a pressure sensor, and a driver. The base is used to be embedded in the groove of the load-bearing column of the gantry frame; the fixing component is used to connect with the movable column of the gantry frame; the transmission component is connected to the fixing component; the pressure sensor is located between the transmission component and the fixing component, with one end of the pressure sensor connected to the fixing component and the other end abutting against the transmission component; the output end of the driver acts on the fixing component to drive the fixing component, the transmission component, and the pressure sensor to move closer to or away from the base, so that the transmission component abuts against the base.

[0016] This force-measuring device uses a fixing component to secure a pressure sensor and a transmission component to the movable column of a gantry. An actuator drives the pressure sensor and transmission component closer to the base, causing them to come into contact and continuously apply force. The pressure sensor detects the clamping force between the transmission component and the base. By detecting this actual clamping force, the device determines the gantry's suitability and ability to stably hold materials. The transmission component prevents direct contact between the pressure sensor and the base, avoiding potential off-center loading errors, nonlinear responses, and mechanical damage, thus improving detection accuracy and extending the lifespan of the pressure sensor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the force measuring device provided in this embodiment; Figure 2 This is a cross-sectional schematic diagram of the force measuring device provided in this embodiment; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a schematic diagram of the connecting plate in the force measuring device provided in this embodiment; Figure 5 This is a schematic diagram of the base in the force measuring device provided in this embodiment.

[0019] Icons: 100-Force measuring device; 110-Base; 111-Main body; 112-Bearing plate; 113-First stiffener; 114-Second stiffener; 120-Fixing component; 121-Connecting plate; 1211-Threaded hole; 122-Bolt; 123-Cylinder; 124-Screw; 125-Nut; 126-Elastic washer; 130-Transmission component; 131-Sleeve; 132-Thrust joint bearing; 133-Bearing head; 140-Pressure sensor; 150-First connector; 160-Second connector; 210-Moving column; 220-Bearing column. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention 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, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0025] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0026] The gantry crane comprises, from top to bottom, a fixed column, a movable column 210, and a support column 220. The fixed column serves as the top crossbeam structure and is used to mount the hydraulic cylinder. The piston rod (movable end) of the hydraulic cylinder is connected to the movable column 210, driving it to reciprocate vertically. The support column 220 is the bottom support component, with a groove on its top surface for positioning and supporting the material to be clamped. In operation, the hydraulic cylinder pushes the movable column 210 downwards, causing it and the support column 220 to work together to apply a clamping force to the material placed in the groove.

[0027] To test whether the loading force of the gantry crane can reach the preset value and ensure that the gantry crane can stably fix the materials, please refer to... Figure 1 and Figure 2 The present invention provides a force measuring device 100, which includes a base 110, a fixing component 120, a transmission component 130, a pressure sensor 140, and a driver. The base 110 is used to be embedded in the groove of the support column 220 of the gantry frame; the fixing component 120 is used to be connected to the movable column 210 of the gantry frame; the transmission component 130 is connected to the fixing component 120; the pressure sensor 140 is located between the transmission component 130 and the fixing component 120, one end of the pressure sensor 140 is connected to the fixing component 120, and the other end abuts against the transmission component 130; the output end of the driver acts on the fixing component 120 to drive the fixing component 120, the transmission component 130, and the pressure sensor 140 to move closer to or away from the base 110, so that the transmission component 130 abuts against the base 110.

[0028] Understandably, in this embodiment, the transmission assembly 130 and the pressure sensor 140 are fixed to the movable column 210 of the gantry using the fixing assembly 120. Then, under the action of the driver, i.e., the hydraulic cylinder, the transmission assembly 130 and the pressure sensor 140 are brought close to the base 110 and finally come into contact with the base 110. Subsequently, the driver continuously applies pressure to the transmission assembly 130. The interaction force between the transmission assembly 130 and the base 110 when they come into contact is transmitted to the pressure sensor 140 through the transmission assembly 130. This allows the pressure sensor 140 to monitor the loading force between the transmission assembly 130 and the base 110 in real time, thereby monitoring the loading force between the movable column 210 and the fixed column of the gantry. If the monitored loading force is greater than or equal to a preset value, it indicates that the gantry is qualified and can stably fix the material.

[0029] The fixing assembly 120 fixes the transmission assembly 130 and the pressure sensor 140 to the bottom of the movable column 210 of the gantry frame, forming a force-measuring subunit that can move synchronously with the movable column 210. The driver (i.e., the hydraulic cylinder inherent in the gantry frame) acts directly on the movable column 210 through its piston rod, driving the entire force-measuring subunit to move vertically toward the base 110 until the transmission assembly 130 abuts against the base 110. Thereafter, the hydraulic cylinder continues to apply thrust, causing the base 110 to generate a reaction force on the transmission assembly 130; this force is transmitted through the transmission assembly 130 to the force-bearing surface of the pressure sensor 140, and the pressure sensor 140 outputs a corresponding electrical signal in real time to the display screen electrically connected to it, thereby realizing dynamic monitoring of the actual clamping force between the movable column 210 and the bearing column 220. When the value of the monitored actual clamping force reaches or exceeds the preset qualified threshold, it indicates that the gantry frame has the loading capacity and structural rigidity required by the working conditions, and can be judged as qualified, and can reliably and stably clamp materials.

[0030] Therefore, the force measuring device 100 can detect the actual loading force between the movable column 210 and the bearing column 220 under normal working conditions without modifying the original structure of the gantry, thereby accurately determining whether the gantry meets the preset clamping performance requirements. At the same time, by setting the transmission component 130, the device avoids the potential for off-center loading errors, nonlinear response and mechanical damage caused by direct contact between the pressure sensor 140 and the base 110, thereby improving the accuracy of detection and the service life of the pressure sensor 140.

[0031] According to the above, in this embodiment, the transmission assembly 130 includes a sleeve 131, a thrust joint bearing 132, and a bearing pressure head 133. The thrust joint bearing 132 and the thrust joint bearing 133 are both housed within the sleeve 131. The thrust joint bearing 132 is connected to the inner wall of the sleeve 131. One end of the bearing pressure head 133 abuts against the thrust joint bearing 132, and the other end abuts against the pressure sensor 140.

[0032] It should be noted that during actual installation, slight assembly misalignment may exist between the fixed component 120 and the movable column 210, and between the base 110 and the groove of the bearing column 220. Furthermore, the movable column 210 itself may experience slight bending deformation due to manufacturing tolerances or long-term use. To address these multiple sources of misalignment, this embodiment includes a sleeve 131, a thrust spherical bearing 132, and a bearing pressure head 133. The outer ring of the thrust spherical bearing 132 abuts against the inner ring of the sleeve 131, and the inner ring of the thrust spherical bearing 132 fits against the spherical surface of the bearing pressure head 133. This allows loads from other directions to be corrected to the axial direction of the pressure sensor 140, preventing forces from other directions from being transmitted to the pressure sensor 140 and improving detection accuracy.

[0033] The bottom end face of the sleeve 131 abuts against the thrust spherical bearing 132, and the thrust spherical bearing 132 is sequentially provided with a bearing pressure head 133 and a pressure sensor 140. When the driver applies axial pressure, the sleeve 131 and the pressure sensor 140 together form an axial support structure for the thrust spherical bearing 132 and the bearing pressure head 133, so as to ensure the stability of the thrust spherical bearing 132 and the bearing pressure head 133, avoid gaps or relative sliding between them, and improve the accuracy of detection. In addition, the sleeve 131 can also provide external protection for the thrust spherical bearing 132 and the bearing pressure head 133 to prevent damage to the thrust spherical bearing 132 and the bearing pressure head 133.

[0034] Further, please refer to Figure 1 and Figure 2 The fixing component 120 includes a connecting plate 121 and a bolt 122. The stud of the bolt 122 is connected to the connecting plate 121, and the nut of the bolt 122 is used to abut against the arched bottom of the movable column 210. The connecting plate 121 is used to connect to the bottom of the column of the movable column 210.

[0035] In this embodiment, the gantry frame is used to clamp and fix a cylindrical workpiece (hereinafter referred to as "shaft"). To adapt to the outer contour of the shaft, the movable column 210 has an arc-shaped groove on the side facing the bearing column 220 that matches the outer diameter of the shaft. To improve the installation stability of the force measuring device 100 on the movable column 210, the connecting plate 121 in the fixing assembly 120 is installed at the bottom of the movable column 210; at the same time, the fixing assembly 120 includes at least one bolt 122, the bearing surface of the nut of the bolt 122 is machined into a spherical or arc surface, and the radius of curvature tends to be consistent with the curvature of the inner surface of the arc-shaped groove on the movable column 210; in the installed state, the bearing surface of the nut is in close contact with the inner surface of the arc-shaped groove, thereby improving the structural stability of the force measuring device 100.

[0036] It should be noted that the fixing assembly 120 also includes a cylindrical body 123. One end of the cylindrical body 123 is connected to the connecting plate 121, and the other end extends into the sleeve 131. The outer wall of the cylindrical body 123 is connected to the inner wall of the sleeve 131. A portion of the pressure sensor 140 is housed within the cylindrical body 123, and another portion extends out of the cylindrical body 123 and is housed within the sleeve 131. In other words, the sleeve 131 is coaxially fitted around the outer periphery of the cylindrical body 123. The force-bearing end of the pressure sensor 140 extends axially out of the cylindrical body 123 and into the inner cavity of the sleeve 131, directly abutting against the end face of the bearing head 133 located inside the sleeve 131. This ensures that the axial clamping force output from the bearing head 133 can be quickly transmitted to the pressure sensor 140 without passing through intermediate components, thereby improving the accuracy of detection.

[0037] In this embodiment, the sleeve 131 has a first elongated hole and a second elongated hole on its side wall; the force measuring device 100 also includes a first connector 150 and a second connector 160, the first connector 150 passes through the first elongated hole and is connected to the cylinder 123, and the second connector 160 passes through the second elongated hole and is connected to the thrust joint bearing 132.

[0038] It can be deduced that the extension directions of the first elongated hole and the second elongated hole are both parallel to the axis of the sleeve 131, and the first elongated hole is located above the second elongated hole. During assembly, the operator can observe the depth of the cylinder 123 into the inner cavity of the sleeve 131 through the first elongated hole: when the upper end face of the cylinder 123 just covers the first elongated hole, while the second elongated hole is still visible, it indicates that the cylinder 123 has reached the preset installation position; at this time, the first connecting piece 150 (to fasten the cylinder 123 and the sleeve 131) and the second connecting piece 160 (to fasten the outer ring of the thrust spherical bearing 132 and the sleeve 131) can be inserted respectively to complete the positioning and installation of the transmission assembly 130.

[0039] The first and second elongated holes can also provide a certain amount of movement space for the sleeve 131 to prevent the thrust joint bearing 132 from jamming due to a sudden increase in preload, thus ensuring its self-aligning function remains effective.

[0040] Based on the above, please refer to... Figures 1-4 The connecting plate 121 is provided with multiple threaded holes 1211, which are arranged circumferentially around the axis of the cylinder 123. The force measuring device 100 also includes a cylindrical head screw, which is connected to the pressure sensor 140 and threadedly connected to the multiple threaded holes 1211. The distribution center of the multiple threaded holes 1211 coincides with the axis of the cylinder 123. Thus, this embodiment improves the installation stability of the pressure sensor 140 through the threaded connection of the cylindrical head screw and the threaded holes 1211, and avoids the pressure sensor 140 from loosening and affecting the detection accuracy during the drive of its movement. Since the bottom of the movable column 210 is provided with a pulley or other structure, the connecting plate 121 still has a through hole to avoid the pulley below the movable column 210.

[0041] Further, please refer to Figures 1-4 The fixing assembly 120 also includes a screw 124, a nut 125 and an elastic washer 126; one end of the screw 124 is connected to the connecting plate 121, and the other end is used to pass through the movable column 210 of the gantry frame and is threadedly connected to the nut 125; the elastic washer 126 is disposed between the nut 125 and the movable column 210.

[0042] Understandably, the movable column 210 has a through hole running vertically through it; one end of the screw 124 passes through this through hole and is threadedly connected to the nut 125 located above the movable column 210, thereby forming a clamping structure between the nut 125 and the connecting plate 121 on both sides of the movable column 210, applying a stable axial preload and improving installation stability. The elastic washer 126 can absorb the impact of the hydraulic cylinder using its own elasticity, improving the service life of the nut 125; furthermore, in this embodiment, an elastic washer 126 is also provided between the connecting plate 121 and the lower surface of the movable column 210.

[0043] Further, please refer to Figures 1-5 The base 110 includes a main body 111 and a support plate 112. The main body 111 is connected to the middle of the support plate 112 and is used to abut against the transmission assembly 130. Both ends of the support plate 112 are equipped with lifting rings. Thus, workers can use lifting equipment and the lifting rings to transfer the base 110 to the groove of the support column 220 and embed it into the groove.

[0044] The base 110 also includes two first stiffeners 113 and two second stiffeners 114, which are connected to the side of the load-bearing plate 112 away from the main body 111. The two first stiffeners 113 are arranged at intervals along a first direction, and the two second stiffeners 114 are arranged at intervals along a second direction. The first direction and the second direction are perpendicular to each other.

[0045] Specifically, the two first stiffeners 113 and the two second stiffeners 114 are arranged in a "well" shape; the two first stiffeners 113 respectively abut against the opposite sides of the groove in the first direction; the two second stiffeners 114 respectively abut against the opposite sides of the support column 220 in the second direction; restricting the movement of the base 110 in multiple directions, preventing the base 110 from shifting, which would affect the accuracy of the detection, and improving the installation stability between the base 110 and the support column 220.

[0046] The present invention also provides a force measurement method, which uses the aforementioned force measuring device 100 for testing. The steps of the force measurement method are as follows: S1: Insert the base 110 into the groove of the support column 220 of the gantry frame.

[0047] S2: Install the fixing component 120 at the bottom of the movable column 210 of the gantry.

[0048] S3: Mount the transmission assembly 130 onto the fixed assembly 120.

[0049] S4: Start the driver to drive the transmission assembly 130 to move toward the base 110 until the transmission assembly 130 comes into contact with the base 110.

[0050] S5: Continue applying pressure until the force value detected by the pressure sensor 140 is greater than the preset threshold.

[0051] S6: Control the transmission assembly 130 to separate from the base 110 and reset.

[0052] S7: Repeat steps S4 to S6.

[0053] Specifically, before formal testing, the base 110 can be hoisted into the groove of the support column 220 using hoisting equipment; then, the bearing surface of the nut of the bolt 122 is tightly fitted with the inner surface of the arc-shaped groove, and the connecting plate 121 and the nut 125 are respectively connected to the two ends of the screw 124 that passes through the movable column 210; next, the pressure sensor 140 and the sleeve 131 that houses the thrust joint bearing 132 and the bearing pressure head 133 are installed and fastened using connectors.

[0054] After the device is installed, the drive unit (i.e., hydraulic cylinder) is used to move the transmission component 130 close to the base 110, so that the two come into contact. After contact, force is continuously applied until the actual bearing force displayed on the monitor, which is electrically connected to the pressure sensor 140, reaches or exceeds the preset value. This is repeated multiple times to ensure that the loading force of the gantry can reach the preset value, thereby ensuring that the gantry can stably fix the material.

[0055] In summary, this embodiment uses a fixing component 120 to fix the pressure sensor 140 and the transmission component 130 to the movable column 210 of the gantry frame. The driver moves the pressure sensor 140 and the transmission component 130 closer to the base 110, causing the transmission component 130 to abut against the base 110 and continuously applying force. This allows the pressure sensor 140 to detect the clamping force between the transmission component 130 and the base 110. By detecting the actual clamping force between the transmission component 130 and the base 110, the gantry frame's qualification and its ability to stably fix materials can be determined. This embodiment, by using the transmission component 130, avoids direct contact between the pressure sensor 140 and the base 110, which could cause off-center loading errors, nonlinear responses, and mechanical damage, thereby improving detection accuracy and extending the lifespan of the pressure sensor 140.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A force measuring device, characterized in that, include: A base (110) is used to be embedded in the groove of the support column (220) of the gantry frame; A fixing component (120) is used to connect to the movable column (210) of the gantry frame; A transmission assembly (130) is connected to the fixed assembly (120); A pressure sensor (140) is located between the transmission assembly (130) and the fixed assembly (120). One end of the pressure sensor (140) is connected to the fixed assembly (120), and the other end abuts against the transmission assembly (130). as well as The driver, whose output acts on the fixed component (120), drives the fixed component (120), the transmission component (130) and the pressure sensor (140) to move closer to or away from the base (110), so that the transmission component (130) abuts against the base (110).

2. The force measuring device according to claim 1, characterized in that, The transmission assembly (130) includes a sleeve (131), a thrust spherical bearing (132), and a bearing head (133), wherein the thrust spherical bearing (132) and the bearing head (133) are both housed within the sleeve (131); The thrust joint bearing (132) is connected to the inner wall of the sleeve (131); one end of the bearing head (133) abuts against the thrust joint bearing (132), and the other end abuts against the pressure sensor (140).

3. The force measuring device according to claim 2, characterized in that, The fixing component (120) includes a connecting plate (121) and a bolt (122), the stud of the bolt (122) being connected to the connecting plate (121), and the nut of the bolt (122) being used to abut against the arched bottom of the movable column (210); the connecting plate (121) being used to connect to the bottom of the column of the movable column (210).

4. The force measuring device according to claim 3, characterized in that, The fixing assembly (120) also includes a cylinder (123), one end of which is connected to the connecting plate (121) and the other end extends into the sleeve (131). The outer wall of the cylinder (123) is connected to the inner wall of the sleeve (131). A portion of the pressure sensor (140) is housed in the cylinder (123) and another portion extends out of the cylinder (123) and is housed in the sleeve (131).

5. The force measuring device according to claim 4, characterized in that, The sleeve (131) has a first elongated hole and a second elongated hole on its side wall; The force measuring device (100) further includes a first connector (150) and a second connector (160). The first connector (150) passes through the first elongated hole and is connected to the cylinder (123). The second connector (160) passes through the second elongated hole and is connected to the thrust joint bearing (132).

6. The force measuring device according to claim 4, characterized in that, The connecting plate (121) is provided with a plurality of threaded holes (1211), which are arranged circumferentially around the axis of the cylinder (123); the force measuring device (100) also includes a cylindrical head screw, which is connected to the pressure sensor (140) and threadedly connected to the plurality of threaded holes (1211).

7. The force measuring device according to claim 3, characterized in that, The fixing component (120) also includes a screw (124), a nut (125), and an elastic washer (126); one end of the screw (124) is connected to the connecting plate (121), and the other end is used to pass through the movable column (210) of the gantry frame and is threadedly connected to the nut (125); the elastic washer (126) is disposed between the nut (125) and the movable column (210).

8. The force measuring device according to claim 1, characterized in that, The base (110) includes a main body (111) and a support plate (112). The main body (111) is connected to the middle of the support plate (112) and is used to abut against the transmission assembly (130). Both ends of the support plate (112) are equipped with lifting rings.

9. The force measuring device according to claim 8, characterized in that, The base (110) further includes two first stiffening plates (113) and two second stiffening plates (114), the two first stiffening plates (113) and the two second stiffening plates (114) being connected to the side of the load-bearing plate (112) away from the main body (111); the two first stiffening plates (113) are arranged at intervals along a first direction, and the two second stiffening plates (114) are arranged at intervals along a second direction; Wherein, the first direction and the second direction are perpendicular to each other.

10. A method for measuring force, characterized in that, The force measuring device (100) according to any one of claims 1-9 is used for testing, and the force measuring method includes: The base (110) is embedded into the groove of the support column (220) of the gantry frame; Install the fixing component (120) at the bottom of the movable column (210) of the gantry frame; The transmission assembly (130) is mounted on the fixed assembly (120); Start the driver to drive the transmission assembly (130) to move toward the base (110) until the transmission assembly (130) abuts against the base (110); Continue applying pressure until the force value detected by the pressure sensor (140) is greater than a preset threshold; Control the transmission assembly (130) to separate from the base (110) and reset.

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