Hugging force testing device

Abstract

The application provides a holding force testing device, which comprises a conical mandrel, a plurality of fan-shaped force component sleeves, a tension sensor, a driving device and a support table. The conical mandrel has a conical head and a connecting portion connected with the conical head. The support table has a support surface for supporting the fan-shaped force component sleeves. The fan-shaped force component sleeves have inner arc surfaces for abutting against the outer arc surface of the conical head. The inner arc surfaces are tangent to the outer arc surface. The outer arc surface of the conical head and the support surface have a preset angle. One end of the tension sensor is connected with the connecting portion, and the other end is connected with the driving device. The driving device is used for driving the conical mandrel to move, so that the conical head pushes the fan-shaped force component sleeves to abut against a to-be-tested piece. The tension sensor is used for acquiring the holding force of the to-be-tested piece. When the driving device of the holding force testing device drives the conical mandrel to move, the conical head of the conical mandrel pushes the fan-shaped force component sleeves to abut against the to-be-tested piece. The holding force of the to-be-tested piece can be acquired through the tension sensor.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment testing technology, and more specifically, relates to a clamping force testing device. Background Technology

[0002] In electrical equipment moving connection elements, three common connection methods are spring contacts, strap contacts, and star-shaped contacts. Regardless of the connection method, the radial pressure of the contacts is a crucial parameter of the connection device. The sum of the radial pressures of all contacts is called the clamping force. When the clamping force is too low, the connection resistance between electrical components increases, reducing the effectiveness and reliability of the contact. Conversely, when the clamping force is too high, the breaking force between the connecting parts increases, affecting the opening and closing of the connection mechanism. Simultaneously, wear between components increases, reducing the equipment's lifespan. Therefore, detecting the contact pressure, i.e., the clamping force, of the contacts is extremely important. Summary of the Invention

[0003] This invention proposes a clamping force testing device to measure the clamping force of electrical connectors such as spring contacts, watch strap contacts, and star-shaped contacts.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a clamping force testing device, including a conical core rod, multiple fan-shaped force-component sleeves, a tension sensor, a driving device, and a support platform;

[0005] The conical mandrel has a conical head and a connecting portion connected to the conical head. The support platform has a support surface for supporting the fan-shaped force-shaping sleeve. The fan-shaped force-shaping sleeve is movably disposed on the support surface and is arranged circumferentially around the conical head. The fan-shaped force-shaping sleeve has an inner arc surface for abutting against the outer arc surface of the conical head. The inner arc surface is tangent to the outer arc surface. The outer arc surface of the conical head has a preset angle with the support surface. The outer side of the fan-shaped force-shaping sleeve is used to place the test piece. The connecting portion passes through the support surface. One end of the tension sensor is connected to the connecting portion, and the other end of the tension sensor is connected to the driving device. The driving device is used to drive the conical mandrel to move so that the conical head pushes the fan-shaped force-shaping sleeve to abut against the test piece. The tension sensor is used to obtain the clamping force of the test piece.

[0006] In one embodiment, the driving device includes a drive motor and a ball screw, wherein the ball screw nut is fixedly connected to the tension sensor.

[0007] In one embodiment, the preset angle is 45 degrees.

[0008] In one embodiment, the number of the sector-shaped force-shaping sleeves is greater than or equal to four.

[0009] In one embodiment, the fan-shaped force-shaping sleeve includes a horizontal portion parallel to the support platform and a vertical portion perpendicular to the support platform. The horizontal portion and the vertical portion are integrally connected, and the radial length of the horizontal portion is greater than the radial length of the vertical portion.

[0010] In one embodiment, a limiting groove is formed on the support surface to restrict the movement direction of the sector-shaped force-shaping sleeve. A ball bearing is provided on the side of the sector-shaped force-shaping sleeve that contacts the support surface, and the ball bearing is at least partially located within the limiting groove.

[0011] In one embodiment, a diameter measuring structure is further included. The diameter measuring structure includes a first synchronous pulley, a synchronous belt, a second synchronous belt, and a potentiometer. The first synchronous pulley is fixed to the lead screw. The synchronous belt is sleeved on the first and second synchronous pulleys. The potentiometer is connected to the second synchronous pulley. The potentiometer is used to acquire the vertical displacement of the lead screw nut. The controller is used to control the drive motor to stop rotating when the vertical displacement of the lead screw nut reaches a preset value.

[0012] In one embodiment, a spring is fitted on the outer side of the fan-shaped force-shaping sleeve, the spring being used to tighten the fan-shaped force-shaping sleeve.

[0013] In one embodiment, an outer housing is also included, in which the tension sensor, driving device, support platform, and diameter measuring structure are all located. The outer housing includes a top plate and side plates around the top plate. The top plate has an opening for the fan-shaped force-shaping sleeve to extend out, and a support plate is provided on the top plate for placing the part to be measured.

[0014] In one embodiment, a display screen is provided on the top plate. The display screen is electrically connected to the tension sensor and the potentiometer. The display screen is used to display the diameter and clamping force of the part to be measured.

[0015] The clamping force testing device provided by this invention includes a conical mandrel, multiple fan-shaped force-shaping sleeves, a tension sensor, a driving device, and a support platform. The conical mandrel has a conical head and a connecting part connected to the conical head. The support platform has a support surface for supporting the fan-shaped force-shaping sleeves. The fan-shaped force-shaping sleeves are movably disposed on the support surface and are arranged circumferentially around the conical head. The fan-shaped force-shaping sleeves have an inner arc surface for abutting against the outer arc surface of the conical head. The inner arc surface is tangent to the outer arc surface. The outer arc surface of the conical head has a preset angle with the support surface. The outer side of the fan-shaped force-shaping sleeves is used to place the test piece. The connecting part passes through the support surface. One end of the tension sensor is connected to the connecting part, and the other end of the tension sensor is connected to the driving device. The driving device is used to drive the conical mandrel to move so that the conical head pushes the fan-shaped force-shaping sleeves to abut against the test piece. The tension sensor is used to obtain the clamping force of the test piece. When the clamping force testing device drives the conical mandrel to move through the drive device, the conical head of the conical mandrel pushes the fan-shaped force component sleeve to abut against the test piece, and the clamping force of the test piece can be obtained through the tension sensor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the gripping force testing device provided in an embodiment of the present invention from one perspective;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of the clamping force testing device provided in an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the clamping force testing principle of the clamping force testing device for the test piece provided in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the clamping force testing principle of the clamping force testing device for the test piece provided in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of a partial explosion of the clamping force testing device provided in an embodiment of the present invention;

[0022] Figure 6 for Figure 5 A structural diagram from one perspective;

[0023] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at point AA;

[0024] Figure 8 This is a schematic diagram illustrating the principle and structure of the clamping force testing device for testing the diameter of the workpiece provided in an embodiment of the present invention.

[0025] Figure 9 This is a top view of the clamping force testing device provided in an embodiment of the present invention.

[0026] The following are the labeling elements in the figure:

[0027] 1-Conical mandrel; 2-Fan-shaped force-shaping sleeve; 3-Tension sensor; 4-Drive device; 5-Support platform; 6-Diameter measuring structure; 7-Support plate; 8-Display screen; 9-Outer housing; 11-Conical head; 12-Connecting part; 21-Horizontal part; 22-Vertical part; 41-Drive motor; 42-Ball screw; 51-Support surface; 61-First synchronous pulley; 62-Synchronous belt; 63-Second synchronous pulley; 64-Polypotentiometer; 91-Top plate; 421-Screw nut; 422-Screw. Detailed Implementation

[0028] 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, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0030] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "connection," "linking," "fixing," "installation," etc., should be interpreted broadly. For example, they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise expressly limited, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present 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. Therefore, they should not be construed as limitations on the present invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. It should be understood that the term "and / or" as used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone.

[0033] The clamping force testing device provided by the present invention will be described in detail below with reference to specific embodiments.

[0034] Figure 1 This is a schematic diagram of the gripping force testing device provided in an embodiment of the present invention from one perspective. Figure 2 This is a cross-sectional structural diagram of the clamping force testing device provided in an embodiment of the present invention. Figure 3 For a schematic diagram of the clamping force testing principle of the clamping force testing device provided in this embodiment of the invention, please refer to [the original text]. Figure 1-3 As shown, the clamping force testing device provided in this embodiment of the invention includes a conical core rod 1, multiple fan-shaped force-shaping sleeves 2, a tension sensor 3, a driving device 4, and a support platform 5;

[0035] The conical mandrel 1 has a conical head 11 and a connecting portion 12 connected to the conical head 11. The support platform 5 has a support surface 51 for supporting the sector-shaped force-shaping sleeve 2. The sector-shaped force-shaping sleeve 2 is movably disposed on the support surface 51. The sector-shaped force-shaping sleeve 2 is arranged circumferentially around the conical head 11. The sector-shaped force-shaping sleeve 2 has an inner arc surface for abutting against the outer arc surface of the conical head 11. The inner arc surface is tangent to the outer arc surface. The surface has a preset angle with the support surface 51. The outer side of the fan-shaped force-shaping sleeve 2 is used to place the test piece. The connecting part 12 passes through the support surface 51. One end of the tension sensor 3 is connected to the connecting part 12, and the other end of the tension sensor 3 is connected to the driving device 4. The driving device 4 is used to drive the conical mandrel 1 to move so that the conical head 11 pushes the fan-shaped force-shaping sleeve 2 to abut against the test piece. The tension sensor 3 is used to obtain the clamping force of the test piece.

[0036] The conical mandrel 1 of this embodiment has a conical head 11 and a connecting part 12 connected to the conical head 11. The outer arc surface of the conical head 11 is tangent to the inner arc surface of the fan-shaped force-shaping sleeve 2. The curvature of the conical head 11 of the conical mandrel 1 in this embodiment matches the curvature of the fan-shaped force-shaping sleeve 2. This embodiment does not impose any special limitation on the diameter of the conical mandrel 1. For example, the preset angle between the outer arc surface of the conical head 11 and the support surface 51 in this embodiment is 45 degrees. For example, the diameter of the conical head 11 of the conical mandrel 1 is the same as the diameter of the fan-shaped force-shaping sleeve 2 when it is not separated.

[0037] In this embodiment, there are multiple sector-shaped force-component sleeves 2. The specific number of sector-shaped force-component sleeves 2 is not particularly limited in this embodiment. The outer side of the sector-shaped force-component sleeve 2 is used to place the component under test. The diameter of the sector-shaped force-component sleeve 2 when closed is larger than the diameter of the component under test, so that the component under test is fitted onto the outer side of the sector-shaped force-component sleeve 2 when closed. The component under test in this embodiment can be a spring contact finger, a watch strap contact finger, or a star-shaped contact finger, etc., that requires testing gripping force.

[0038] In this embodiment, the support platform 5 has a support surface 51 for supporting the fan-shaped force-shaping sleeve 2. The fan-shaped force-shaping sleeve 2 moves on the support surface 51. The tension sensor 3 and the driving device 4 are located on the lower side of the support surface 51. An opening is provided on the support surface 51 for the connecting part 12 to pass through. In this embodiment, the driving device 4 is used to drive the conical mandrel 1 to move, so that the conical head 11 pushes the fan-shaped force-shaping sleeve 2 to abut against the test piece. This embodiment does not impose any special restrictions on the specific structure of the driving device 4. For example, the driving device 4 is a structure in which a driving motor 41 and a ball screw 42 cooperate. The screw nut 421 of the ball screw 42 is fixedly connected to the tension sensor 3. When the driving motor 41 drives the threaded screw 422 to rotate, the screw nut 421 moves in the vertical direction. For example, when the screw 422 moves downward in the vertical direction, the screw nut 421 drives the connecting part 12 of the conical mandrel 1 to move downward. The conical head 11 of the conical mandrel 1 moves downward, thereby opening the fan-shaped force-shaping sleeve 2, so that the test piece hugs the fan-shaped force-shaping sleeve 2.

[0039] The tension sensor 3 in this embodiment is a device that converts physical signals into measurable electrical signals. The tension sensor 3 in this embodiment is an S-type tension sensor, which is easy to install and convenient to use. One end of the tension sensor 3 is connected to the connecting part, and the other end of the tension sensor 3 is connected to the driving device. The driving device drives the conical mandrel 1 to move, so that the conical head 11 pushes the fan-shaped force component sleeve 2 to press against the workpiece to be measured.

[0040] Figure 4 For a schematic diagram of the clamping force testing principle of the clamping force testing device provided in this embodiment of the invention, please refer to [link / reference]. Figure 3 and Figure 4The principle of the clamping force testing device in this embodiment for obtaining the clamping force of the test piece is as follows: After the test piece is fitted onto the outer periphery of the fan-shaped force-shaping sleeve 2, the driving device 4 drives the tension sensor 3 to move downward. The connecting part 12 fixed on the tension sensor 3 drives the conical head 11 to move downward, thereby expanding the fan-shaped force-shaping sleeve 2. The opening direction of the fan-shaped force-shaping sleeve 2 is shown in the figure. In the figure, F0 is the downward driving force when the driving device 4 drives the conical mandrel 1 to move, which is also the tension value measured by the tension sensor 3. F01 and F02 are the reaction forces of the fan-shaped force-shaping sleeve 2 on the conical head 11 when the conical head 11 of the conical mandrel 1 abuts against the fan-shaped force-shaping sleeve 2. Among them, F11 is the horizontal component of F01. F01 is the vertical component of force, F22 is the horizontal component of force, and F22' is the vertical component of force. In this embodiment, the preset angle between the outer arc surface of the conical head 11 and the support surface 51 is 45 degrees, that is, the direction where F01 and F02 are located is 45 degrees with the horizontal direction. F11 = F11' and F22 = F22'. Since F0' = F11' + F22' and F0' = F0, F11 + F22 = F0. That is, the tension value measured by the tension sensor 3 is the clamping force of the test piece. In this embodiment, the contact surface between the conical head 11 of the conical core rod 1 and the fan-shaped force component sleeve 2 is a smooth surface, and the friction between the conical head 11 and the fan-shaped force component sleeve 2 is negligible.

[0041] The clamping force testing device provided by this invention includes a conical mandrel, multiple fan-shaped force-shaping sleeves, a tension sensor, a driving device, and a support platform. The conical mandrel has a conical head and a connecting portion connected to the conical head. The support platform has a support surface for supporting the fan-shaped force-shaping sleeves. The fan-shaped force-shaping sleeves are movably disposed on the support surface and are arranged circumferentially around the conical head. Each fan-shaped force-shaping sleeve has an inner arc surface for abutting against the outer arc surface of the conical head. The inner arc surface is tangent to the outer arc surface. The outer arc surface of the conical head has a preset angle with the support surface. The outer side of the fan-shaped force-shaping sleeve is used to place the test piece. The connecting part passes through the support surface. One end of the tension sensor is connected to the connecting part, and the other end of the tension sensor is connected to the driving device. The driving device is used to drive the conical mandrel to move so that the conical head pushes the fan-shaped force-shaping sleeve to abut against the test piece. The tension sensor is used to obtain the clamping force of the test piece. When the clamping force testing device drives the conical mandrel to move through the driving device, the conical head of the conical mandrel pushes the fan-shaped force-shaping sleeve to abut against the test piece. The clamping force of the test piece can be obtained through the tension sensor.

[0042] In the above embodiment, the angle between the outer arc surface of the conical head 11 and the supporting surface 51 is 45 degrees. This is because the fan-shaped force-shaping sleeve 2 has an inner arc surface for contacting the outer arc surface of the conical head 11. The inner arc surface is tangent to the outer arc surface, meaning that the angle between the inner arc surface of the fan-shaped force-shaping sleeve 2 and the supporting surface is also 45 degrees. Of course, in other embodiments, the angle between the outer arc surface of the conical head 11 and the supporting surface 51 can be other angles, such as 30 degrees or 60 degrees.

[0043] Optionally, the number of the fan-shaped force-shaping sleeves 2 is greater than or equal to four. In this embodiment, the number of fan-shaped force-shaping sleeves 2 can be determined according to the structure of the test piece. For example, when the test piece is a plum blossom finger, the number of fan-shaped force-shaping sleeves 2 can be matched with the number of contact pieces of the plum blossom finger. For example, if the number of contact pieces of the plum blossom finger is eight, the number of fan-shaped force-shaping sleeves 2 will also be eight.

[0044] Figure 5 This is a partial exploded structural diagram of the clamping force testing device provided in an embodiment of the present invention. Figure 6 for Figure 5 A structural diagram from one perspective. Figure 7 for Figure 6 Please refer to the cross-sectional structural diagram at point AA. Figures 5-7 In one specific embodiment, the fan-shaped force-shaping sleeve 2 includes a horizontal portion 21 parallel to the support surface 51 and a vertical portion 22 perpendicular to the support surface 51. The horizontal portion 21 and the vertical portion 22 are integrally connected, and the radial length of the horizontal portion 21 is greater than the radial length of the vertical portion 22. In this embodiment, the radial length of the horizontal portion 21 of the fan-shaped force-shaping sleeve 2 is greater than the radial length of the vertical portion 22, resulting in strong stability of the fan-shaped force-shaping sleeve 2 when moving horizontally on the support surface 51. In this embodiment, the outer ring of the vertical portion 22 is provided with a support plate 7 for supporting the workpiece under test.

[0045] Further, please refer to Figures 5-7 A limiting groove 52 is formed on the supporting surface 51. The limiting groove 52 is used to restrict the movement direction of the sector-shaped force-shaping sleeve 2. A ball bearing 53 is provided on the side of the sector-shaped force-shaping sleeve 2 that contacts the supporting surface 51. The ball bearing 53 is at least partially located within the limiting groove 52. In this embodiment, the limiting groove 52 is along the radial direction of the sector-shaped force-shaping sleeve 2. By setting the limiting groove 52, the sector-shaped force-shaping sleeve 2 can be ensured to move radially. The ball bearing 53 is provided on the side of the sector-shaped force-shaping sleeve 2 that contacts the supporting surface 51. The friction between the sector-shaped force-shaping sleeve 2 and the supporting surface 51 is rolling friction, which is small and negligible.

[0046] Figure 8 This is a schematic diagram illustrating the principle and structure of the clamping force testing device for testing the diameter of the workpiece provided in an embodiment of the present invention. In a specific embodiment, please refer to... Figure 2 , Figure 8 The clamping force testing device also includes a diameter measuring structure 6 and a controller. The diameter measuring structure includes a first synchronous pulley 61, a synchronous belt 62, a second synchronous pulley 63, and a potentiometer 64. The first synchronous pulley 61 is fixed on the lead screw 422. The synchronous belt 62 is sleeved on the first synchronous pulley 61 and the second synchronous pulley 63. The potentiometer 64 is connected to the second synchronous pulley 63. The potentiometer 64 is used to obtain the vertical displacement of the lead screw nut 421. The controller is used to control the drive motor 41 to stop rotating when the vertical displacement of the lead screw nut 421 reaches a preset value.

[0047] In the clamping force testing device of this embodiment, the preset angle is 45 degrees. A first synchronous pulley 61 is provided on the ball screw 422. The first synchronous pulley 61 transmits the rotation of the ball screw 422 to a second synchronous pulley 63. The second synchronous pulley 63 drives the potentiometer 64 to rotate. In this embodiment, the vertical displacement of the ball screw 422 is obtained by the number of rotations of the ball screw 422. The potentiometer 64 converts the vertical displacement of the ball screw 422 into a resistance value, which can then be used to obtain the vertical displacement of the ball screw 422. Please refer to [link to previous document]. Figure 2 and Figure 8 For example, in the initial position, the outer arc surface of the conical head 11 of the conical mandrel 1 is in contact with the inner arc surface of the fan-shaped force-shaping sleeve 2. During the test, because the preset angle is 45 degrees, when the conical mandrel moves Lmm, the fan-shaped force-shaping sleeve moves Lmm accordingly, and the diameter of the test piece increases by 2Lmm. The vertical displacement of the lead screw 422 is equal to the horizontal displacement of the fan-shaped force-shaping sleeve 2. In this embodiment, the diameter of the test piece can be obtained from the vertical displacement of the lead screw 422 and the diameter of the fan-shaped force-shaping sleeve 2. In this embodiment, there is a corresponding relationship between the resistance value of the potentiometer 64 and the number of rotations of the lead screw 422, and a corresponding relationship between the vertical displacement of the lead screw 422 and the number of rotations of the lead screw 422. That is, in this embodiment, the vertical displacement of the lead screw 422 can be obtained through the resistance value of the potentiometer 64, thereby obtaining the diameter of the test piece.

[0048] Preferably, a spring is fitted on the outer side of the sector-shaped force-shaping sleeve 2, and the spring is used to tighten the sector-shaped force-shaping sleeve 2. In this embodiment, by setting a spring on the outer side of the sector-shaped force-shaping sleeve 2, after the conical mandrel 1 is reset, the spring will bring each sector-shaped force-shaping sleeve 2 together and return it to its original position. The tightening force of the spring in this embodiment is small, and the influence of the clamping force on the test piece can be ignored.

[0049] Figure 9 Please refer to the top view of the clamping force testing device provided in the embodiment of the present invention. Figure 1 , 2 and Figure 9 Furthermore, the clamping force testing device in this embodiment also includes an outer housing 9. The tension sensor 3, driving device 4, support platform 5, and diameter measuring structure 6 are all located inside the outer housing 9. The outer housing 9 includes a top plate 91 and side plates around the top plate 91. The top plate 91 has an opening for the fan-shaped force-shaping sleeve 2 to extend out, and a support plate 7 is provided on the top plate 91 for placing the part to be tested. In this embodiment, by setting the outer housing 9, the tension sensor 3, driving device 4, support platform 5, and diameter measuring structure 6 are placed inside the outer housing 9, and the outer housing 9 protects the tension sensor 3, driving device 4, support platform 5, and diameter measuring structure 6. The top plate 91 and the support plate 7 have openings for the fan-shaped force-shaping sleeve 2 to extend out. The area of ​​the openings is larger than the diameter of the fan-shaped force-shaping sleeve 2 and the diameter of the part to be tested. In this embodiment, the support plate 7 is used to place the part to be tested.

[0050] Furthermore, a display screen 8 is provided on the top plate 91. The display screen 8 is electrically connected to the tension sensor 3 and the potentiometer 64. The display screen 8 is used to display the diameter and clamping force of the part to be tested. In this embodiment, there can be one or two display screens 8. When there are two display screens 8, one display screen 8 is used to display the diameter, and the other display screen 8 is used to display the clamping force. The clamping force testing device in this embodiment is also provided with start and stop buttons, which are electrically connected to the drive motor 41. For example, when the lead screw 422 rotates one revolution, the conical mandrel 1 moves downward by Lmm. The synchronous belt 62 drives the potentiometer 64 to change simultaneously. By changing the value of the potentiometer 64, the distance that the conical mandrel 1 moves can be obtained, thereby obtaining the distance that the fan-shaped force component sleeve 2 moves in the horizontal direction, and thus obtaining the diameter of the part to be tested. The diameter value is displayed on the display screen 8.

[0051] For example, the diameter displayed on the initial position display screen 8 is the diameter of the fan-shaped force-shaping sleeve 2. The driving device drives the conical mandrel 1 to move downward and push the fan-shaped force-shaping sleeve 2 to abut against the workpiece under test. During the rotation of the lead screw 422, the controller obtains the vertical displacement of the lead screw 422 through the resistance value of the potentiometer 64, thereby obtaining the diameter of the workpiece under test.

[0052] The usage process of the clamping force testing device in this embodiment is as follows: Turn on the power, and the diameter of the fan-shaped force-shaping sleeve 2 is displayed on the display screen 8, and the clamping force display value is zero; place the test piece on the periphery of the fan-shaped force-shaping sleeve 2; press the start button, and when the diameter on the display screen 8 reaches the preset value (the diameter of the test piece), record the clamping force value on the display screen 8; press the stop button, and the drive motor 41 drives the conical mandrel 1 to return to the initial position.

[0053] The clamping force testing device provided in this embodiment of the invention includes a conical mandrel, multiple fan-shaped force-shaping sleeves, a tension sensor, a driving device, and a support platform. The conical mandrel has a conical head and a connecting portion connected to the conical head. The support platform has a support surface for supporting the fan-shaped force-shaping sleeves. The fan-shaped force-shaping sleeves are movably disposed on the support surface and are arranged circumferentially around the conical head. Each fan-shaped force-shaping sleeve has an inner arc surface for abutting against the outer arc surface of the conical head. The inner arc surface is tangent to the outer arc surface. The outer arc surface of the conical head has a preset angle with the support surface. The outer side of the fan-shaped force-shaping sleeve is used to place the test piece. The connecting part passes through the support surface. One end of the tension sensor is connected to the connecting part, and the other end of the tension sensor is connected to the driving device. The driving device is used to drive the conical mandrel to move so that the conical head pushes the fan-shaped force-shaping sleeve to abut against the test piece. The tension sensor is used to obtain the clamping force of the test piece. When the clamping force testing device drives the conical mandrel to move through the driving device, the conical head of the conical mandrel pushes the fan-shaped force-shaping sleeve to abut against the test piece. The clamping force of the test piece can be obtained through the tension sensor.

[0054] In the above description, the terms "an embodiment," "some embodiments," "example," "specific example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clamping force testing device, characterized in that: It includes a conical mandrel, multiple sector-shaped force-shaping sleeves, a tension sensor, a drive device, and a support platform; The conical mandrel has a conical head and a connecting portion connected to the conical head. The support platform has a support surface for supporting the fan-shaped force-shaping sleeve. The fan-shaped force-shaping sleeve is movably disposed on the support surface and is arranged circumferentially around the conical head. The fan-shaped force-shaping sleeve has an inner arc surface for abutting against the outer arc surface of the conical head. The inner arc surface is tangent to the outer arc surface. The outer arc surface of the conical head has a preset angle with the support surface. The outer side of the fan-shaped force-shaping sleeve is used to place the test piece. The connecting portion passes through the support surface. One end of the tension sensor is connected to the connecting portion, and the other end of the tension sensor is connected to the driving device. The driving device is used to drive the conical mandrel to move so that the conical head pushes the fan-shaped force-shaping sleeve to abut against the test piece. The tension sensor is used to obtain the clamping force of the test piece.

2. The clamping force testing device according to claim 1, characterized in that: The driving device includes a drive motor and a ball screw, and the ball screw nut is fixedly connected to the tension sensor.

3. The clamping force testing device according to claim 1, characterized in that: The preset angle is 45 degrees.

4. The clamping force testing device according to claim 1, characterized in that: The number of the sector-shaped force-shaping sleeves is greater than or equal to four.

5. The clamping force testing device according to claim 4, characterized in that: The fan-shaped force-shaping sleeve includes a horizontal portion parallel to the support surface and a vertical portion perpendicular to the support surface. The horizontal portion and the vertical portion are integrally connected, and the radial length of the horizontal portion is greater than the radial length of the vertical portion.

6. The clamping force testing device according to claim 5, characterized in that: A limiting groove is formed on the support surface to restrict the movement direction of the sector-shaped force-shaping sleeve. A ball bearing is provided on the side of the sector-shaped force-shaping sleeve that contacts the support surface, and the ball bearing is at least partially located in the limiting groove.

7. The clamping force testing device according to claim 2, characterized in that: It also includes a diameter measuring structure and a controller. The diameter measuring structure includes a first synchronous pulley, a synchronous belt, a second synchronous belt, and a potentiometer. The first synchronous pulley is fixed to the lead screw of the ball screw. The synchronous belt is sleeved on the first synchronous pulley and the second synchronous pulley. The potentiometer is connected to the second synchronous pulley and is used to obtain the vertical displacement of the lead screw nut. The controller is used to control the drive motor to stop rotating when the vertical displacement of the lead screw nut reaches a preset value.

8. The clamping force testing device according to claim 7, characterized in that: A spring is fitted on the outer side of the fan-shaped force-shaping sleeve, and the spring is used to tighten the fan-shaped force-shaping sleeve.

9. The clamping force testing device according to claim 8, characterized in that: It also includes an outer casing, in which the tension sensor, drive device, support platform and diameter measuring structure are all located. The outer casing includes a top plate and side plates around the top plate. The top plate has an opening for the fan-shaped force-shaping sleeve to extend out. A support plate is provided on the top plate for placing the part to be measured.

10. The clamping force testing device according to claim 9, characterized in that: The top plate is equipped with a display screen, which is electrically connected to the tension sensor and potentiometer. The display screen is used to display the diameter and clamping force of the part to be measured.

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