Impact resistance testing device for resistance ceramic

Abstract

The utility model discloses an impact resistance testing device for resistance ceramic, and belongs to the technical field of ceramic resistors. The device comprises a frame body, a clamping assembly and an impact assembly. The clamping assembly comprises a connecting piece fixedly connected with the frame body and a mold, the mold comprises a lower mold fixedly connected with the connecting piece and a movable upper mold, and the upper mold and the lower mold can be spliced to form a hole body for clamping the resistance ceramic; the impact assembly comprises moving arms, driving pieces and an impact unit, the two moving arms are symmetrically arranged on the two sides of the mold and are in sliding clamping connection with the frame body, and the two driving pieces are connected with the two moving arms in a one-to-one correspondence mode so that the two moving arms can be driven to move relative to the mold; the impact unit is connected with the moving arm and arranged opposite to the hole body, and the impact unit can hit the pressing caps located at the two ends of the resistor ceramic at the same time. According to the utility model, the actual use environment of the resistance ceramic can be simulated, and the most real test data can be obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of ceramic resistors, in particular to an impact resistance testing device for resistor ceramics. Background Art

[0002] Resistor ceramics are the core material of ceramic resistors, determining their electrical and physical properties. Resistor ceramics generally consist of a central ceramic base and two resistor caps at each end. The base is typically made of a high-resistivity oxide ceramic material, such as zinc oxide, magnesium oxide, aluminum oxide, or other composite oxides. The resistor caps primarily provide electrical connections and mechanical fixation at both ends of the resistor, ensuring reliable connection to the circuit while protecting the resistor's internal structure.

[0003] Resistor ceramics typically undergo various performance tests before leaving the factory. Impact resistance testing is a key component. However, during use, resistor ceramics are typically subjected to bidirectional impacts from both ends simultaneously. Existing impact testing equipment fails to simulate these conditions, resulting in inaccurate test results. Utility Model Content

[0004] In view of this, it is necessary to provide a resistance ceramic impact test device to solve the problem of inaccurate resistance ceramic impact test in the prior art.

[0005] The utility model provides a resistance ceramic impact test device, comprising:

[0006] frame;

[0007] A clamping assembly, the clamping assembly comprising a connector fixedly connected to the frame and a mold, the mold comprising a lower mold fixedly connected to the connector and a movable upper mold, the upper mold and the lower mold being able to be assembled to form a hole for clamping the resistor ceramic;

[0008] The impact assembly includes a movable arm, a driving member and an impact unit. The two movable arms are symmetrically arranged on both sides of the mold and are respectively slidably engaged with the frame. The two driving members are respectively connected to the two movable arms one by one to drive the two movable arms to move relative to the mold; the impact unit is connected to the movable arm and is arranged relative to the hole body. The impact unit can simultaneously hit the pressure caps located at both ends of the resistor ceramic.

[0009] Furthermore, the hole body includes a first pressing part and two second pressing parts located at both ends of the first pressing part. The inner diameter of the second pressing part is larger than that of the first pressing part. The second pressing part is used to cooperate with the pressure caps at both ends of the resistor ceramic.

[0010] Furthermore, an elastic ring is provided on the first pressing portion, and the elastic ring is arranged along the radial direction of the hole body. A plurality of the elastic rings are equidistantly arranged along the axial direction of the hole body, and the elastic ring can abut against the circumferential surface of the resistor ceramic.

[0011] Furthermore, a groove body is provided on the upper mold and passes through the upper mold. The structure, shape and size of the lower mold are consistent with those of the upper mold. The groove bodies of the upper mold and the lower mold are spliced ​​and combined to form the hole body.

[0012] Furthermore, the clamping assembly also includes a quick clamp, the fixed part of the quick clamp is fixedly connected to the connecting piece, and the movable part of the quick clamp is fixedly connected to the upper mold. The quick clamp can drive the upper mold to rotate relative to the lower mold to achieve clamping and loosening of the resistor ceramic.

[0013] Furthermore, the impact unit includes a connection block detachably connected to the movable arm and an impact hammer, and the impact hammer is installed in the connection block and arranged relative to the hole body.

[0014] Furthermore, the connecting block is provided with at least two mounting holes arranged in a one-to-one correspondence with the hole bodies, and the impact hammer is installed in the mounting holes.

[0015] Furthermore, the impact hammer is a copper impact hammer.

[0016] Furthermore, the frame includes a U-shaped frame and a sliding rod, at least two of the sliding rods are arranged in the U-shaped frame, the two ends of the sliding rod are respectively connected to the two sides of the U-shaped frame, the movable arm is slidably engaged with the sliding rod, and the connecting member is fixedly connected to the sliding rod and the U-shaped frame.

[0017] Furthermore, the driving member includes an impact cylinder and a bracket, the fixed portion of the impact cylinder is connected to the side of the U-shaped frame through the bracket, and the movable portion of the impact cylinder is connected to the movable arm.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The utility model provides a device for testing the impact resistance of resistor ceramics, which is provided with a clamping assembly. The clamping assembly includes a connecting piece and a mold. The connecting piece is fixed to the frame and always remains fixed. The mold includes an upper mold and a lower mold. The lower mold is fixedly connected to the connecting piece. The upper mold can move relative to the lower mold to form an open mold state and a closed mold state. In the closed mold state, the upper mold and the lower mold can be combined into a whole. A hole body for clamping the resistor ceramic is formed between the upper mold and the lower mold. The hole body is adapted to the shape of the resistor ceramic and can firmly clamp the resistor ceramic to ensure that the resistor ceramic remains stable during the test process and avoid relative slippage of the resistor ceramic, which interferes with the results of the impact resistance test. In the open mold state, the upper mold is separated from the lower mold, and the resistor ceramic can be freely replaced as needed to perform batch testing and improve the efficiency of the test.

[0020] (2) The utility model provides a resistance ceramic impact test device, which is provided with an impact assembly, which includes a movable arm, a driving member, and an impact unit. The two movable arms are symmetrically arranged on both sides of the mold, and the two movable arms are respectively slidably engaged with the frame, and the movable arms can move relative to the frame. The two driving members are respectively connected to the two movable arms in a one-to-one correspondence, and the driving members can drive the movable arms to move relative to the mold. The impact unit is connected to the movable arm, and the impact unit is arranged relative to the hole body. The movable arm driven by the driving member can drive the impact unit to simultaneously impact the pressure caps located at both ends of the resistance ceramic. The strength and direction of the impact can be adjusted to simulate the actual working conditions where the two ends of the resistance ceramic are subjected to different degrees of impact force, so as to obtain the most realistic impact resistance test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a structural diagram of the clamping assembly in the utility model;

[0024] Figure 3 It is a structural diagram of the mold in the utility model;

[0025] Figure 4 It is a structural diagram of the middle and lower molds of the utility model;

[0026] Figure 5 This is a schematic diagram of the connection structure between the moving arm and the impact unit in the present utility model;

[0027] Figure 6 It is a structural diagram of the frame of the utility model;

[0028] Figure 7 It is a structural diagram of the driving component in the utility model.

[0029] In the figure, 100, frame; 110, U-shaped frame; 120, slide bar;

[0030] 200, clamping assembly; 210, connecting member; 220, mold; 221, upper mold; 222, lower mold; 223, hole body; 223a, first pressing part; 223b, second pressing part; 223c, elastic ring; 224, groove body; 230, quick pressing pliers;

[0031] 300, impact assembly; 310, moving arm; 320, driving member; 321, impact cylinder; 322, bracket; 330, impact unit; 331, connecting block; 332, impact hammer. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0033] In this embodiment, a device for testing the impact resistance of resistor ceramics relates to the field of ceramic resistor technology. A mold 220 is used to effectively clamp a resistor ceramic with a special structure, and an impact hammer 332 is used to simultaneously perform an impact test on the resistor ceramic from both ends of the resistor ceramic, thereby simulating the actual use environment of the resistor ceramic and obtaining the most realistic test data.

[0034] See also Figures 1 to 7 In this embodiment, a resistance ceramic impact test device includes: a frame 100, a clamping assembly 200 and an impact assembly 300, wherein the frame 100 can provide a support and fixing basis for the clamping assembly 200 and the impact assembly 300, the clamping assembly 200 can clamp the resistance ceramic according to the special shape of the resistance ceramic, and the impact assembly 300 can impact the resistance ceramic from both ends of the resistance ceramic at the same time to complete the test of the resistance ceramic.

[0035] The clamping assembly 200 includes a connecting member 210 and a mold 220 . The connecting member 210 is fixed to the frame 100 and remains stationary.

[0036] Mold 220 includes an upper mold 221 and a lower mold 222. Lower mold 222 is fixedly connected to connector 210. Upper mold 221 can move relative to lower mold 222 to form an open and closed mold state. In the closed mold state, upper mold 221 and lower mold 222 can be assembled into a single unit. A hole 223 for clamping the resistor ceramic is formed between upper mold 221 and lower mold 222. Hole 223 is adapted to the shape of the resistor ceramic and can firmly clamp the resistor ceramic, ensuring the stability of the resistor ceramic during testing and preventing relative slippage of the resistor ceramic that could interfere with the impact resistance test results. In the open mold state, upper mold 221 is separated from lower mold 222, allowing the resistor ceramic to be freely replaced as needed, allowing for batch testing and improving test efficiency.

[0037] The impact assembly 300 includes a movable arm 310, a driving member 320, and an impact unit 330. The two movable arms 310 are symmetrically arranged on either side of the mold 220. The two movable arms 310 are respectively slidably engaged with the frame 100, and the movable arms 310 can move relative to the frame 100. The two driving members 320 are respectively connected to the two movable arms 310 in a one-to-one correspondence. The driving members 320 can drive the movable arms 310 to move relative to the mold 220. The impact unit 330 is connected to the movable arms 310 and is arranged relative to the hole 223. The movable arms 310 driven by the driving member 320 can drive the impact unit 330 to simultaneously impact the pressure caps located at both ends of the resistor ceramic. The strength and direction of the impact can be adjusted to simulate the different degrees of impact force on both ends of the resistor ceramic under actual working conditions, thereby obtaining the most realistic impact resistance test results.

[0038] In some embodiments, see Figures 2 to 4 The hole body 223 includes a first pressing portion 223a and second pressing portions 223b located at both ends of the first pressing portion 223a. The first pressing portion 223a and the second pressing portion 223b are integrally formed and form part of the hole body 223. The inner diameter of the second pressing portion 223b is larger than that of the first pressing portion 223a. The second pressing portion 223b is used to mate with the pressure caps at both ends of the resistor ceramic, while the first pressing portion 223a mates with the resistor ceramic.

[0039] It should be noted that since resistor ceramics typically have resistor caps at both ends, and the diameter of the resistor caps is often larger than the ceramic body, the second pressing portion 223b has a larger inner diameter, which can well accommodate the pressure caps at both ends of the resistor ceramic, ensuring that they are stably embedded therein, thereby providing precise support and fixation. The inner diameter of the first pressing portion 223a matches the size of the resistor ceramic body, ensuring that the resistor ceramic body is also firmly clamped. This not only fixes the ceramic pressure caps, but also stabilizes the entire ceramic body, thereby ensuring its overall stability during impact testing.

[0040] In some embodiments, see Figure 4An elastic ring 223c is provided on the first pressing portion 223a. The elastic ring 223c is made of an elastic material such as rubber, plastic, or soft metal. The elastic ring 223c is capable of undergoing a certain degree of elastic deformation when in contact with the circumferential surface of the resistor ceramic. This elastic deformation allows the elastic ring 223c to apply uniform pressure to the resistor ceramic, effectively clamping it. Compared to a rigid clamping structure, the elastic ring 223c can accommodate minor dimensional errors or deformations on the resistor ceramic surface, preventing it from loosening or slipping during testing, thereby improving the stability and reliability of the clamping.

[0041] Elastic ring 223c is positioned radially along hole 223, protruding from the inner side of hole 223. Multiple elastic rings 223c are equidistantly spaced along the axial direction of hole 223, allowing them to simultaneously abut the circumferential surface of the resistor ceramic. Each elastic ring 223c simultaneously contacts the circumferential surface of the resistor ceramic, evenly distributing the clamping force across the surface of the resistor ceramic. This design avoids the concentration of clamping force in a single area, effectively reducing stress concentration and preventing damage to the resistor ceramic caused by excessive localized stress.

[0042] In some embodiments, see Figure 3 and Figure 4 Upper mold 221 is provided with a slot 224 extending through it. The inner cavities of slots 224 in both upper and lower molds 221 and 222 are designed to be semicircular, with dimensions matching the shape of the resistor ceramic. When assembled, these two molds form a complete circular hole 223 that precisely encloses the circumference of the resistor ceramic. This structure ensures that the resistor ceramic is stably clamped within mold 220, preventing displacement or loosening during testing. This maintains the ceramic's position and improves test accuracy.

[0043] Furthermore, the semicircular groove 224 provides uniform support around the circumference of the resistor ceramic, preventing the clamping force from being concentrated in a single area. Compared to designs with irregular or localized support, the semicircular groove 224 disperses the applied force, preventing damage to the resistor ceramic due to excessive localized force. This helps protect the structural integrity of the resistor ceramic, particularly during impact testing.

[0044] In some embodiments, see Figure 2 The clamping assembly 200 also includes a quick pressing clamp 230. The fixed part of the quick pressing clamp 230 is fixedly connected to the connecting member 210, and the movable part of the quick pressing clamp 230 is fixedly connected to the upper mold 221. Pulling the quick pressing clamp 230 can drive the upper mold 221 to rotate relative to the lower mold 222, so that the upper mold 221 and the lower mold 222 can switch between the open mold state and the closed mold state, thereby achieving clamping and loosening of the resistor ceramic.

[0045] The quick-action clamp 230 allows the user to rotate the upper die 221 relative to the lower die 222 with a simple flick of the clamp, quickly clamping or releasing the resistor ceramic. This greatly simplifies traditional manual clamping, shortening the time required to install and remove the resistor ceramic and improving overall operational efficiency. This can significantly speed up the process, especially when frequent testing or sample replacement is required.

[0046] The movable portion of the quick-action clamp 230 connects to the upper mold 221, allowing the clamp to apply uniform, controllable clamping force to the upper mold 221. Compared to manual tightening or other clamping methods, the quick-action clamp 230 provides a constant, precise clamping force, ensuring that the resistor ceramic remains firmly in place during testing. This prevents sample movement or damage due to insufficient or excessive clamping force, thereby improving test accuracy and reliability.

[0047] In some embodiments, see Figure 5 The impact unit 330 includes a connecting block 331 and an impact hammer 332 that are detachably connected to the movable arm 310. A mounting slot is provided on the movable arm 310, and the connecting block 331 is embedded in the mounting slot. Bolts pass through the movable arm 310 and connect to the connecting block 331 to complete the fixation of the connecting block 331. By designing the connecting block 331 to be detachable and fixing it with bolts, the impact unit 330 can be easily replaced or disassembled according to test requirements. The impact test device can adapt to resistance ceramics of different specifications or impact tests of different intensities. Users only need to replace the appropriate impact hammer 332 or connecting block 331 to complete the adjustment, avoiding the disassembly or replacement of the entire device, which greatly improves the adaptability and flexibility of the equipment.

[0048] Hammer 332 is precisely mounted on movable arm 310 at a fixed position via connecting block 331 and positioned relative to hole 223. This placement ensures that hammer 332 strikes both ends of the resistor ceramic accurately, preventing inaccurate test results caused by misaligned impact positions. Furthermore, the stable mounting of hammer 332 helps maintain even distribution of impact force, improving the repeatability and reliability of the testing process.

[0049] In some embodiments, please refer to Figure 5 At least two mounting holes are provided on the connecting block 331, and the mounting holes are arranged in a one-to-one correspondence with the hole body 223. The impact hammer 332 is installed in the mounting hole. The impact hammer 332 can impact multiple resistor ceramics at a time to test the impact resistance of the resistor ceramics.

[0050] The impact hammer 332 can simultaneously perform impact tests on multiple ceramic resistors, eliminating the tedious process of testing each one individually and significantly improving testing efficiency. The impact resistance of multiple ceramic resistors can be evaluated simultaneously in the same test setup, making it ideal for batch testing and saving time and labor costs, especially in large-scale production.

[0051] When multiple resistor ceramics are simultaneously placed in the same test environment and subjected to the same impact force, it is possible to ensure that each resistor ceramic is under the same test conditions, thereby improving the repeatability and consistency of the test results, avoiding result differences caused by changes in test conditions (such as equipment errors and environmental changes), and ensuring that the impact resistance of each sample is fairly and objectively evaluated.

[0052] In a specific implementation, the impact hammer 332 is made of copper. It can also be made of a plastic composite material, aluminum alloy, or mild steel. These materials provide excellent toughness and impact resistance, making them less susceptible to damage during repeated impacts with the resistor ceramic and maintaining their shape and function. These materials also help reduce wear on the impact hammer 332 during extended use, extending the life of the device.

[0053] Furthermore, the impact hammer 332 made of the aforementioned material is relatively soft, with a lower hardness than many ceramic materials. Compared to hard materials like steel, the impact hammer 332 effectively reduces surface damage to the resistive ceramic sample when striking it, preventing excessive structural damage and minimizing undesirable breakage or wear of the sample.

[0054] In some embodiments, see Figure 1 and Figure 6 The frame 100 includes a U-shaped frame 110 and a sliding rod 120. At least two sliding rods 120 are arranged in the U-shaped frame 110, and the two ends of the sliding rod 120 are respectively connected to the two side parts of the U-shaped frame 110. The vertical support surfaces on both sides of the U-shaped frame 110 can effectively withstand and disperse the stress generated during the impact test, avoiding distortion of the test data due to structural deformation or loosening. The U-shaped frame 110 is also beneficial to the rigidity of the overall device, ensuring that it is not easy to deform during the test and maintaining the test accuracy. The movable arm 310 is slidably engaged with the sliding rod 120, and the connecting member 210 is fixedly connected to the sliding rod 120 and the U-shaped frame 110. The cross-section of the sliding rod 120 is square or circular, and the setting of the sliding rod 120 provides a smooth sliding path for the movable arm 310, ensuring that the impact unit 330 can move accurately and apply impact force during the test. The sliding engagement between the slide bar 120 and the movable arm 310 enables the movable arm 310 to move in a predetermined direction, thereby avoiding unnecessary swinging or deflection and ensuring the symmetry and uniformity of the impact force.

[0055] In some embodiments, see Figure 1 and Figure 7 The driving member 320 includes an impact cylinder 321 and a bracket 322. The fixed part of the impact cylinder 321 is connected to the side of the U-shaped frame 110 through the bracket 322, and the movable part of the impact cylinder 321 is connected to the movable arm 310. As the driving member 320, the impact cylinder 321 can provide a strong and stable driving force, and push the movable arm 310 to move smoothly through its movable part. The driving force of the cylinder is relatively large and controllable, and can accurately control the movement speed and strength of the impact unit 330, ensuring that a uniform and stable impact force is applied to the pressure caps at both ends of the resistor ceramic. The cylinder is driven by compressed gas, and its movement process is smooth and the speed is easy to adjust. The impact force can be accurately controlled by adjusting the air pressure and stroke of the cylinder.

[0056] Workflow: First, the quick-action clamp 230 is actuated to open the upper and lower molds 221 and 222, allowing the resistor ceramic to be tested to be inserted into the slot 224. Next, the quick-action clamp 230 is actuated to close the upper and lower molds 221 and 222, securing the resistor ceramic. Next, the impact cylinder 321 is activated, driving the two movable arms 310 relative to the mold 220. The movable arms 310 drive the impact hammer 332 to strike the ends of the resistor ceramic, completing the impact test. Finally, the resistor ceramic is removed for damage testing to obtain the most realistic test data.

[0057] The above description is only a preferred specific implementation of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A resistance ceramic impact test device, characterized in that: include: frame; A clamping assembly, the clamping assembly comprising a connector fixedly connected to the frame and a mold, the mold comprising a lower mold fixedly connected to the connector and a movable upper mold, the upper mold and the lower mold being able to be assembled to form a hole for clamping the resistor ceramic; The impact assembly includes a movable arm, a driving member and an impact unit. The two movable arms are symmetrically arranged on both sides of the mold and are respectively slidably engaged with the frame. The two driving members are respectively connected to the two movable arms one by one to drive the two movable arms to move relative to the mold; the impact unit is connected to the movable arm and is arranged relative to the hole body. The impact unit can simultaneously hit the pressure caps located at both ends of the resistor ceramic.

2. The impact resistance testing device for resistor ceramics according to claim 1, characterized in that: The hole body includes a first pressing part and two second pressing parts located at both ends of the first pressing part. The inner diameter of the second pressing part is larger than that of the first pressing part. The second pressing part is used to cooperate with the pressure caps at both ends of the resistance ceramic.

3. The impact resistance testing device for resistor ceramics according to claim 2, characterized in that: An elastic ring is provided on the first pressing portion. The elastic ring is arranged along the radial direction of the hole body. A plurality of the elastic rings are equidistantly arranged along the axial direction of the hole body. The elastic ring can abut against the circumferential surface of the resistance ceramic.

4. The impact resistance testing device for resistor ceramics according to claim 3, characterized in that: The upper die is provided with a groove body which passes through the upper die. The lower die has the same structure, shape and size as the upper die. The groove bodies of the upper die and the lower die are spliced ​​and combined to form the hole body.

5. The impact resistance testing device for resistor ceramics according to claim 1, characterized in that: The clamping assembly also includes a quick pressing clamp, the fixed part of the quick pressing clamp is fixedly connected to the connecting piece, and the movable part of the quick pressing clamp is fixedly connected to the upper mold. The quick pressing clamp can drive the upper mold to rotate relative to the lower mold to achieve clamping and loosening of the resistance ceramic.

6. The impact resistance testing device for resistor ceramics according to claim 1, characterized in that: The impact unit includes a connection block detachably connected to the movable arm and an impact hammer, wherein the impact hammer is installed in the connection block and is arranged relative to the hole body.

7. The impact resistance testing device for resistor ceramics according to claim 6, characterized in that: The connecting block is provided with at least two mounting holes which are arranged in a one-to-one correspondence with the hole bodies, and the impact hammer is installed in the mounting holes.

8. The impact resistance testing device for resistor ceramics according to claim 7, characterized in that: The impact hammer is a copper impact hammer.

9. The impact resistance testing device for resistor ceramics according to claim 1, characterized in that: The frame includes a U-shaped frame and a sliding rod, at least two of the sliding rods are arranged in the U-shaped frame, the two ends of the sliding rod are respectively connected to the two sides of the U-shaped frame, the movable arm is slidably engaged with the sliding rod, and the connecting piece is fixedly connected to the sliding rod and the U-shaped frame.

10. The impact resistance testing device for resistor ceramics according to claim 9, characterized in that: The driving member includes an impact cylinder and a bracket, the fixed portion of the impact cylinder is connected to the side of the U-shaped frame through the bracket, and the movable portion of the impact cylinder is connected to the moving arm.

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