Clamping device and shear force testing instrument
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DELI TOOLS CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-08-07
AI Technical Summary
[0004]但是，螺母与钳剪类工具的夹持部位仅通过刚性的平面或简单曲面进行抵靠接触，缺乏能够随受力状态自适应调整的贴合结构，随着剪切动作的进行，钳剪类工具受到的力值逐渐变化，抵靠部位容易因受力不均衡而产生微小的位移或转动，尤其是在剪切力达到峰值的瞬间，钳剪类工具会对螺母产生反向的冲击力，此时仅靠螺母的刚性抵靠难以维持稳定的夹持姿态，极易出现打滑或偏移
[0024]本实用新型提出一种夹持装置，通过将固定件与转动件活动连接，再将锁紧件与固定件连接用于调节固定件与转动件的相对位置，从而使得固定件和转动件能够夹持住钳剪类工具的手柄；同时，转动件转动连接于安装座，使得钳剪类工具在剪切过程中固定件与转动件可随手柄受力状态自适应调整角度，保证钳剪类工具的手柄与固定件和转动件始终紧密贴合，维持稳定的夹持姿态，有效防止打滑或偏移。并且，由于钳剪类工具的手柄在初始安装时张开角度较大，此时可通过旋转转动件调整固定件的角度，使两个夹具能够适应钳剪类工具的手柄张开的大角度，从而也提升了钳剪类工具安装的便捷性。
Smart Images
Figure CN224608867U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of shearing force testing equipment for pliers and shears, and in particular to a clamping device and a shearing force testing instrument. Background Technology
[0002] Pliers and shears are widely used in power construction, building engineering, and machinery maintenance. Their shearing performance directly affects work efficiency and operational safety. Therefore, it is necessary to use specialized shearing force testing instruments to test key indicators such as maximum shearing force and shearing stability of pliers and shears to ensure they meet relevant standards and usage requirements.
[0003] Existing shear force testing instruments consist of a lead screw with oppositely oriented threads on its upper and lower sections. A nut is fitted at each end of the lead screw, and a force sensor connected to a microcomputer control system is mounted on the opposite end face of one of the nutes. Because the threads on the upper and lower sections of the lead screw are oriented in opposite directions, when the motor drives the lead screw to rotate, the two nuts will move closer or further apart relative to each other, thus clamping pliers or shearing tools and simulating opening and closing actions.
[0004] However, the clamping parts of nuts and pliers only make contact with each other through rigid planes or simple curved surfaces, lacking a fitting structure that can adaptively adjust to the force state. As the shearing action proceeds, the force on the pliers gradually changes, and the contact parts are prone to slight displacement or rotation due to uneven force. Especially at the moment when the shearing force reaches its peak, the pliers will generate a reverse impact force on the nut. At this time, the rigid contact of the nut alone is not enough to maintain a stable clamping posture, and slippage or displacement is very likely to occur.
[0005] Therefore, there is an urgent need to propose a clamping device and a shear force testing instrument to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a clamping device and a shearing force testing instrument that can prevent slippage of pliers and shearing tools during the shearing process and improve the accuracy of testing.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] The clamping device includes two symmetrically arranged clamps, and the two clamps are movable toward each other. Each clamp includes:
[0009] Mounting base;
[0010] A rotating component, rotatably connected to the mounting base;
[0011] A fixing component includes a fixing member and a locking member, wherein the fixing member is movably connected to the rotating member, and the locking member is connected to the fixing member, for adjusting the relative position of the fixing member and the rotating member to clamp the handle of a pliers or scissors.
[0012] Preferably, the mounting base includes a connecting plate and two mounting arms, the two mounting arms being spaced apart on the same side of the connecting plate, the rotating member being located between the two mounting arms and rotatably connected to the two mounting arms, and the rotating member having a through hole;
[0013] The fixing member is U-shaped, partially passing through the through hole and threadedly connected to the locking member. The fixing member and the rotating member form a mounting hole, which is used for the handle of the pliers and shears to pass through.
[0014] Preferably, each clamp is provided with at least two sets of fixing components, the opening width of the fixing members in any two sets of fixing components is different, two through holes are a group, the number of through holes is not less than the number of fixing members, and the distance between the two through holes in each group is the same as the opening width of the corresponding fixing member.
[0015] Alternatively, a set of through holes may be provided, wherein the through holes are configured as strip holes to accommodate the fasteners with different opening widths.
[0016] Preferably, the fastener is a rod with a circular cross-section, and the diameter of the fastener is positively correlated with its opening width; the fastener with a smaller opening width also has a smaller diameter.
[0017] Preferably, the rotating component has a first plane on the side facing the inner arc surface of the fixing component, and the first plane has a first anti-slip tooth pattern.
[0018] Preferably, the rotating member has a second plane on the side facing the opening direction of the fixing member.
[0019] Preferably, the fixing component further includes a pad, on which two connecting holes are spaced apart. The two ends of the fixing member are respectively inserted through the two connecting holes, and the two locking members are respectively screwed to the two ends of the fixing member and abut against the pad.
[0020] Preferably, the fixing member has a second anti-slip serration on the inner arc surface that contacts the handle of the pliers or shears.
[0021] Preferably, the rotating component is provided with a cylindrical rotating shaft, and the mounting base is provided with a corresponding cylindrical shaft hole, and the rotating shaft is inserted into the shaft hole to form a rotational fit.
[0022] A shear force testing instrument includes a frame assembly, a movable frame, a drive assembly, a force sensor, and the aforementioned clamping device. The movable frame is slidably mounted on the frame assembly in a vertical direction. The drive assembly is mounted on the frame assembly to drive the movable frame to move in a vertical direction. One clamp is mounted on the frame assembly, and the other clamp is connected to the movable frame. The force sensor is configured to detect the shear force value of the clamp-like tool.
[0023] The beneficial effects of this utility model are:
[0024] This invention proposes a clamping device. By movably connecting a fixed component and a rotating component, and then connecting a locking component to the fixed component, the relative positions of the fixed and rotating components can be adjusted, allowing the fixed and rotating components to clamp the handle of pliers or shearing tools. Simultaneously, the rotating component is rotatably connected to the mounting base, enabling the fixed and rotating components to adaptively adjust their angles according to the force applied to the handle during the cutting process. This ensures that the handle of the pliers or shearing tools remains tightly fitted with the fixed and rotating components, maintaining a stable clamping posture and effectively preventing slippage or displacement. Furthermore, since the handle of pliers or shearing tools initially opens at a large angle, the angle of the fixed component can be adjusted by rotating the rotating component, allowing the two clamps to adapt to the large opening angle of the handle, thereby improving the ease of installation of pliers or shearing tools.
[0025] This invention proposes a shearing force testing instrument. By employing the aforementioned clamping device, the slippage or displacement of the handle of pliers and shears during the testing process can be effectively prevented, enabling the force sensor to accurately capture the true force value of the pliers and shears during the shearing process, thereby improving the reliability of the shearing force test results of pliers and shears. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the clamping device described in an embodiment of the present invention;
[0027] Figure 2 This is a schematic diagram of the structure of the clamp described in an embodiment of the present utility model;
[0028] Figure 3 This is a schematic diagram of the structure of the mounting base described in an embodiment of this utility model;
[0029] Figure 4 This is a first structural schematic diagram of the rotating component according to an embodiment of the present utility model;
[0030] Figure 5 This is a schematic diagram of the second structure of the rotating component according to an embodiment of the present invention;
[0031] Figure 6This is a schematic diagram of the structure of the fixing component described in an embodiment of the present utility model;
[0032] Figure 7 This is a schematic diagram of the shear force testing instrument described in an embodiment of this utility model.
[0033] In the picture:
[0034] 1. Mounting base; 11. Connecting plate; 12. Mounting arm; 120. Shaft hole;
[0035] 2. Rotating component; 20. Through hole; 21. First anti-slip tooth pattern; 22. Rotating shaft;
[0036] 3. Fixing component; 30. Mounting hole; 31. Fixing element; 32. Locking element;
[0037] 100. Fixtures;
[0038] 200. Rack assembly; 2001. Base; 2002. Column;
[0039] 300. Mobile stand;
[0040] 400. Force sensor. Detailed Implementation
[0041] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0045] like Figures 1-6 As shown, this utility model provides a clamping device, including two symmetrically arranged clamps 100, which can move towards each other. Each clamp 100 includes a mounting base 1, a rotating member 2, and a fixing component 3. The rotating member 2 is rotatably connected to the mounting base 1. The fixing component 3 includes a fixing member 31 and a locking member 32. The fixing member 31 is movably connected to the rotating member 2, and the locking member 32 is connected to the fixing member 31. The fixing member 31 is used to adjust the relative position of the fixing member 31 and the rotating member 2 to clamp the handle of pliers or scissors.
[0046] This invention uses a movable connection between the fixing member 31 and the rotating member 2, and a locking member 32 connected to the fixing member 31 to adjust the relative position of the fixing member 31 and the rotating member 2. This allows the fixing member 31 and the rotating member 2 to clamp the handle of the pliers / scissors. Simultaneously, the rotating member 2 is rotatably connected to the mounting base 1, allowing the fixing member 31 and the rotating member 2 to adaptively adjust their angles according to the force applied to the handle during the cutting process. This ensures that the handle of the pliers / scissors is always tightly fitted to the fixing member 31 and the rotating member 2, maintaining a stable clamping posture and effectively preventing slippage or displacement. Furthermore, since the handle of the pliers / scissors opens at a large angle during initial installation, the angle of the fixing member 31 can be adjusted by rotating the rotating member 2, allowing the two clamps 100 to adapt to the large opening angle of the handle, thus improving the ease of installation of the pliers / scissors.
[0047] Specifically, such as Figure 2As shown, the mounting base 1 includes a connecting plate 11 and two mounting arms 12. The two mounting arms 12 are spaced apart on the same side of the connecting plate 11. A rotating member 2 is located between the two mounting arms 12 and rotatably connected to them. The rotating member 2 has a through hole 20. The fixing member 31 is U-shaped, partially passing through the through hole 20 and threadedly connected to the locking member 32. The fixing member 31 and the rotating member 2 form a mounting hole 30, which is used for the handle of pliers or shearing tools to pass through. The clamping force can be adjusted by tightening the locking member 32, so that the handle is stable and does not wobble in the mounting hole 30, making operation convenient and the fixing effect reliable. At the same time, the support structure of the double mounting arms 12 provides a stable rotation fulcrum for the rotating member 2, preventing it from shifting or wobbling under force.
[0048] In this embodiment, the locking element 32 is a nut.
[0049] In other embodiments, the locking member 32 may also be a square, disc, or irregularly shaped block with a threaded hole, as long as the locking function can be achieved through threaded engagement.
[0050] Specifically, the rotating component 2 is provided with a cylindrical rotating shaft 22, and the mounting base 1 has a corresponding cylindrical shaft hole 120. The rotating shaft 22 is inserted into the shaft hole 120 to form a rotational fit. The fit between the cylindrical rotating shaft 22 and the cylindrical shaft hole 120 ensures coaxiality during rotation and avoids jamming or wear caused by axial misalignment. Secondly, both the rotating shaft 22 and the shaft hole 120 are cylindrical, resulting in a simple structure and low machining difficulty.
[0051] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, cylindrical rotating shafts 22 are provided at both ends of the rotating component 2, and cylindrical shaft holes 120 are opened on the two mounting arms 12 respectively. The two rotating shafts 22 are inserted into the two shaft holes 120 in a one-to-one correspondence to form a rotating fit.
[0052] Specifically, such as Figure 2 and Figure 4 As shown, the rotating component 2 has a first flat surface on the side facing the inner arc surface of the fixed component 31, and the first flat surface has a first anti-slip tooth pattern 21. The first flat surface allows the rotating component 2 to form a surface contact with the handle of the pliers and shears. The first anti-slip tooth pattern 21 forms an alternating concave and convex physical structure on the flat surface. When the handle is clamped, the surface contact of the first flat surface ensures sufficient contact, while the concave and convex structure of the first anti-slip tooth pattern 21 further amplifies the friction effect, making it less likely for the handle of the pliers and shears to slip during the cutting process.
[0053] Specifically, the rotating part 2 has a second flat surface on the side facing the opening of the fixed part 31. When the locking part 32 is tightened, the locking part 32 will directly abut against the second flat surface of the rotating part 2. The flat contact allows the pressure of the locking part 32 to be transmitted to the rotating part 2 more evenly, thereby making the rotating part 2 and the fixed part 31 more reliably clamp the handle of the pliers and shears, preventing the handle from slipping during operation.
[0054] Specifically, such as Figure 2 and Figure 5 As shown, each clamp 100 is provided with at least two sets of fixing components 3. The opening width of the fixing members 31 in any two sets of fixing components 3 is different. Two through holes 20 form a group, and the number of groups of through holes 20 is not less than the number of fixing members 31. The distance between the two through holes 20 in each group is the same as the opening width of the corresponding fixing member 31. Alternatively, a group of through holes 20 is provided, and the through holes 20 are set as strip holes to accommodate fixing members 31 with different opening widths. By providing at least two sets of fixing components 3 with different opening widths and corresponding through holes 20 on the rotating member 2, the clamping device can be adapted to the handles of pliers and shears of different diameters. When dealing with handles of different thicknesses, it is not necessary to replace the entire clamp 100; only the fixing component 3 with the corresponding opening width needs to be replaced. This improves the versatility and applicability of the clamping device, reduces the adaptation cost for different sizes of pliers and shears, and provides flexible and convenient operation, better meeting diverse operational needs.
[0055] In this embodiment, each clamp 100 is provided with two sets of fixing components 3. In one set of fixing components 3, the opening width of the fixing member 31 is 45mm, and in the other set of fixing components 3, the opening width of the fixing member 31 is 20mm.
[0056] In other embodiments, each clamp 100 may also be provided with three sets of fixing components 3. The specific number of fixing components 3 and the opening width of each fixing component 31 are not specifically limited here.
[0057] In this embodiment, as Figure 4 As shown, the rotating part 2 has four through holes 20. Two through holes 20 form a group, and the spacing between the two through holes 20 in each group is different, so as to accommodate two fixing parts 31 with different opening widths.
[0058] In other embodiments, such as Figure 5 As shown, the rotating part 2 has two through holes 20, and the through holes 20 are strip-shaped holes. The distance between the two far ends of the two through holes 20 is not less than the diameter of the fixing part 31 with the largest opening, and the distance between the two near ends of the two through holes 20 is less than the width of the locking part 32 with the smallest opening, so as to adapt to fixing parts 31 of different sizes.
[0059] More specifically, the fixing component 3 also includes a pad with two connecting holes spaced apart. The number of connecting holes corresponds to the number of fixing components 31 and their dimensions are similar. Each end of the fixing component 31 passes through one of the two connecting holes, and two locking components 32 are screwed onto each end of the fixing component 31 and abut against the pad. The pad effectively separates the locking components 32 from the rotating component 2, preventing the locking components 32 from causing indentations or scratches on the surface of the rotating component 2 when tightened.
[0060] Specifically, such as Figure 6 As shown, the fixing member 31 is a rod with a circular cross-section. The diameter of the fixing member 31 is positively correlated with its opening width; the fixing member 31 with a smaller opening width also has a smaller diameter. The fixing member 31 with a smaller opening width has a smaller diameter, which allows it to fit more snugly around the handle of thin-gauge pliers and scissors, avoiding excessive gaps between the rod and the handle due to excessive thickness, thus ensuring clamping stability. On the other hand, the fixing member 31 with a larger opening width uses a larger diameter, which provides stronger structural rigidity when clamping thicker handles, preventing deformation under stress.
[0061] Specifically, the inner arc surface of the fixing member 31, which contacts the handle of the pliers or shears, is provided with a second anti-slip tooth pattern. The second anti-slip tooth pattern on the inner arc surface of the fixing member 31 can cooperate with the first anti-slip tooth pattern 21 of the rotating member 2 to form a bidirectional interlocking friction structure on the outer periphery of the handle, further improving the reliability of the handle clamping.
[0062] like Figure 7 As shown, this utility model also provides a shear force testing instrument, including a frame assembly 200, a movable frame 300, a drive assembly, a force sensor 400, and the aforementioned clamping device. The movable frame 300 is slidably disposed on the frame assembly 200 in the vertical direction. The drive assembly is disposed on the frame assembly 200 for driving the movable frame 300 to move in the vertical direction. One clamp 100 is disposed on the frame assembly 200, and the other clamp 100 is connected to the movable frame 300. The force sensor 400 is configured to detect the shear force value of pliers and shears.
[0063] By using the above-mentioned clamping device, the handle of the pliers and shears can be effectively prevented from slipping or shifting during the test, so that the force sensor 400 can accurately capture the real force value of the pliers and shears during the shearing process, thereby improving the reliability of the shearing force test results of the pliers and shears.
[0064] Working principle: By fixing the two handles of pliers and other cutting tools to the clamps 100 on the base 2001 and the clamps 100 below the moving frame 300 respectively, the locking component 3 ensures that the handles of the pliers and cutting tools are firmly clamped; when the driving component drives the moving frame 300 to move down, the two clamps 100 cause the handles of the pliers and cutting tools to close relative to each other, simulating the actual cutting action; at this time, the upper clamp 100 is connected to the moving frame 300 through the force sensor 400, and the force value generated during the cutting process is detected and recorded in real time by the force sensor 400, thereby completing the accurate test of the cutting force of the pliers and cutting tools.
[0065] In this embodiment, the frame assembly 200 includes a base 2001 and two uprights 2002 symmetrically and vertically arranged on the base 2001. The movable frame 300 is slidably arranged between the two uprights 2001 in the vertical direction. One clamp 100 is installed on the base 2001, and the other clamp 100, force sensor 400 and movable frame 300 are connected in sequence.
[0066] In this embodiment, the drive assembly includes a servo motor and a ball screw transmission mechanism. The output shaft of the servo motor is connected to one end of the ball screw via a coupling, and the nut of the ball screw is fixedly connected to the movable frame 300. When the servo motor starts, its rotational motion is transmitted to the ball screw via the coupling, causing the nut to drive the movable frame 300 to move precisely vertically along the column 2002.
[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A clamping device, characterized in that, The device includes two symmetrically arranged clamps (100), and the two clamps (100) are capable of moving towards each other. Each clamp (100) includes: Mounting base (1); Rotating component (2) is rotatably connected to the mounting base (1); The fixing component (3) includes a fixing member (31) and a locking member (32). The fixing member (31) is movably connected to the rotating member (2), and the locking member (32) is connected to the fixing member (31). It is used to adjust the relative position of the fixing member (31) and the rotating member (2) to clamp the handle of the pliers or shears.
2. The clamping device according to claim 1, characterized in that, The mounting base (1) includes a connecting plate (11) and two mounting arms (12). The two mounting arms (12) are spaced apart on the same side of the connecting plate (11). The rotating member (2) is located between the two mounting arms (12) and is rotatably connected to the two mounting arms (12). The rotating member (2) has a through hole (20). The fixing member (31) is U-shaped, partially passing through the through hole (20) and threadedly connected to the locking member (32). The fixing member (31) and the rotating member (2) form a mounting hole (30), which is used for the handle of pliers and shears to pass through.
3. The clamping device according to claim 2, characterized in that, Each clamp (100) is provided with at least two sets of fixing components (3), and the opening width of the fixing member (31) in any two sets of fixing components (3) is different. Two through holes (20) are a group, and the number of groups of through holes (20) is not less than the number of fixing members (31). The distance between the two through holes (20) in each group is the same as the opening width of the corresponding fixing member (31). Alternatively, a set of through holes (20) may be provided, wherein the through holes (20) are configured as strip holes to accommodate the fasteners (31) with different opening widths.
4. The clamping device according to claim 3, characterized in that, The fixing member (31) is a rod with a circular cross-section. The diameter of the fixing member (31) is positively correlated with its opening width. The fixing member (31) with a smaller opening width also has a smaller diameter.
5. The clamping device according to claim 1, characterized in that, The rotating member (2) has a first plane on the side facing the inner arc surface of the fixing member (31), and the first plane has a first anti-slip tooth pattern (21).
6. The clamping device according to claim 1, characterized in that, The rotating member (2) has a second plane on the side facing the opening direction of the fixing member (31).
7. The clamping device according to claim 6, characterized in that, The fixing component (3) also includes a pad, on which two connecting holes are spaced apart. The two ends of the fixing member (31) are respectively inserted through the two connecting holes, and the two locking members (32) are respectively screwed to the two ends of the fixing member (31) and abut against the pad.
8. The clamping device according to any one of claims 1-7, characterized in that, The fixing member (31) has a second anti-slip tooth pattern on its inner arc surface that contacts the handle of pliers or shears.
9. The clamping device according to any one of claims 1-7, characterized in that, The rotating component (2) is provided with a cylindrical rotating shaft (22), and the mounting base (1) is provided with a corresponding cylindrical shaft hole (120). The rotating shaft (22) is inserted into the shaft hole (120) to form a rotational fit.
10. A shear force testing instrument, characterized in that, The device includes a frame assembly (200), a movable frame (300), a drive assembly, a force sensor (400), and a clamping device according to any one of claims 1-9. The movable frame (300) is slidably disposed on the frame assembly (200) in a vertical direction. The drive assembly is disposed on the frame assembly (200) for driving the movable frame (300) to move in a vertical direction. One clamp (100) is disposed on the frame assembly (200), and the other clamp (100) is connected to the movable frame (300). The force sensor (400) is configured to detect the shearing force value of the pliers / scissors.