A clamp device with detection function

Abstract

The utility model provides a clamp device with detection function relates to clamp tool technical field, the utility model discloses a pair of clamping assembly is established in the clamping unit, and sets up the elastic force transmission spare between clamping baseplate and clamping jaw, makes power module assembly in the clamping process can obtain stable clamping pressure, avoids the welding quality decline problem caused by the unbalance of clamping pressure. The pressure detection module of detection unit includes and is equipped with the pressure monitoring spare of arrangement between elastic force transmission spare and clamping jaw, can monitor the stress condition of elastic force transmission spare in real time to obtain corresponding clamping pressure value, realizes the dynamic control of clamping pressure. Through above -mentioned structure, the utility model not only improved the fixed reliability of power module assembly in the welding process, moreover avoided the pressure imbalance caused by the elastic force transmission spare elastic force change, promoted the stability and consistency of welding quality, guaranteed the welding reliability of power module assembly.

Description

Technical Field

[0001] This utility model relates to the field of clamping tool technology, and in particular to a clamping device with detection function. Background Technology

[0002] With the rapid development of the new energy electric vehicle industry, higher requirements have been placed on the reliability, cost, and lightweighting of electric drive systems. As a core component of the three-electric system (battery, motor, and electronic control), the inverter's integration and high reliability are crucial to the overall vehicle functionality. One of the main functions of the inverter is to convert the DC power input from the battery into AC power for driving the motor or generator. The core sub-component enabling this function is the power module assembly. The power module assembly mainly includes the power module and water-cooled plate. To ensure the welding quality of the power module in the vapor phase reflow soldering process, a special fixture is usually required to position and clamp the power module during the welding process. During welding, the pressure of the fixture plays a vital role in the welding quality. Excessive pressure will cause the molten solder to be squeezed out, resulting in solder balls. Insufficient pressure will prevent the molten solder from spreading, forming voids. Existing welding fixtures still have shortcomings in real-time monitoring of clamping pressure and assembly positioning accuracy, making it difficult to meet the high reliability and high consistency requirements of power module vapor phase reflow soldering. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a clamping device with detection function to solve the related problems in the prior art.

[0004] To achieve the above and other related objectives, this utility model provides a clamping device with a detection function, comprising:

[0005] The clamping unit includes a pair of clamping components for clamping the power module assembly. Each clamping component includes a clamping base plate and a jaw. An elastic force transmission element is provided between the clamping base plate and the jaw to transmit the clamping pressure acting on the power module assembly to the jaw.

[0006] The detection unit includes a pressure detection module, which is equipped with a pressure monitoring element. The pressure monitoring element is arranged between the elastic force transmission element and the gripper to monitor the force on the elastic force transmission element and obtain the corresponding clamping pressure value.

[0007] Furthermore, the clamping unit also includes a positioning component for installing and positioning the power module component.

[0008] Furthermore, the positioning component includes a pair of mating positioning posts and positioning pins;

[0009] The positioning post is disposed on one of the clamping base plates, and the positioning pin is disposed on the other clamping base plate. The positioning pin passes through the power module assembly and is inserted into the positioning post to achieve the installation and positioning of the power module assembly.

[0010] Furthermore, the clamping unit also includes a clamping pressure component for applying opposing pressure to the clamping substrates on both sides to compress the elastic force transmission member.

[0011] Furthermore, the clamping and pressure-applying component includes multiple sets of magnetic attraction structures, each set of magnetic attraction structures being evenly disposed on the surface of the clamping substrate, and the clamping substrates on both sides are clamped by the magnetic attraction force of the magnetic attraction structures.

[0012] Furthermore, the clamping base plate is provided with a guide limiting shaft, and the gripper is provided with a guide limiting hole, and the guide limiting shaft and the guide limiting hole are slidably engaged.

[0013] Furthermore, the clamping assembly includes multiple sets of grippers, which are evenly arranged along the length of the clamping substrate to form distributed clamping pressure at multiple locations of the power module assembly.

[0014] Furthermore, the pressure monitoring device is a force sensor, which includes an elastomer and a resistance strain gauge, with the resistance strain gauge attached to the surface of the elastomer.

[0015] Furthermore, the pressure detection module also includes a signal receiving device, which is electrically connected to the pressure monitoring element and is used to receive and process the electrical signals from the pressure monitoring element.

[0016] Furthermore, the detection unit also includes a contour detection module, which is used to detect the flatness of the gripper surface.

[0017] As described above, the clamping device with detection function of this utility model has at least the following beneficial effects, including but not limited to:

[0018] This invention utilizes paired clamping components within a clamping unit and an elastic force transmission element between the clamping substrate and the grippers to ensure stable clamping pressure for the power module assembly during clamping. The detection unit includes a pressure detection module with a pressure monitoring element positioned between the elastic force transmission element and the grippers. This allows for real-time monitoring of the force on the elastic force transmission element, thereby obtaining the corresponding clamping pressure value and achieving dynamic control of the clamping pressure. When this clamping assembly is applied to vapor phase reflow soldering of power modules, the detection unit can monitor the pressure in real time, preventing excessive or insufficient clamping pressure from affecting the solder composition required for soldering. Furthermore, to address the imbalance of clamping pressure caused by material creep in the elastic force transmission element due to temperature changes or frequent use, real-time monitoring of the elastic force transmission element allows for corresponding maintenance or replacement, ensuring the soldering reliability of the power module assembly and improving the stability and consistency of soldering quality. Attached Figure Description

[0019] Figure 1 The diagram shown is one of the overall structural schematic diagrams of the clamping device according to an embodiment of this application;

[0020] Figure 2 As shown in the embodiments of this application Figure 1 Explosion-proof diagram of the structure;

[0021] Figure 3 The diagram shown is one of the structural schematic diagrams of the clamping substrate in the embodiments of this application;

[0022] Figure 4 The second schematic diagram of the structure of the clamping substrate in the embodiment of this application is shown.

[0023] Figure 5 This is one of the schematic diagrams showing the cooperation between the gripper and the pressure detection module in an embodiment of this application;

[0024] Figure 6 This is shown as the second schematic diagram of the cooperation between the gripper and the pressure detection module in an embodiment of this application;

[0025] Figure 7 The second schematic diagram shows the overall structure of the clamping device according to an embodiment of this application.

[0026] Figure 8 As shown in the embodiments of this application Figure 7 A schematic diagram of the structure exploded.

[0027] Icons: 0. Power module assembly, 1. Clamping assembly, 2. Clamping substrate, 3. Gripper, 4. Elastic force transmission component, 5. Pressure monitoring component, 6. Positioning post, 7. Positioning pin, 8. Magnetic structure, 9. Guide limiting shaft, 10. Guide limiting hole, 11. Signal receiving device, 12. Transmission harness, 13. Surface contour detection device. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] Please refer to Figures 1-6 This application discloses a clamping device with a detection function, including a clamping unit and a detection unit. The clamping unit includes a pair of clamping components 1 for clamping a power module component 0. Each clamping component 1 includes a clamping base plate 2 and a jaw 3. An elastic force transmission element 4 is provided between the clamping base plate 2 and the jaw 3 for transmitting the clamping pressure acting on the power module component 0 to the jaw 3. The detection unit includes a pressure detection module, which is provided with a pressure monitoring element 5. The pressure monitoring element 5 is arranged between the elastic force transmission element 4 and the jaw 3 for monitoring the force on the elastic force transmission element 4 and obtaining the corresponding clamping pressure value.

[0031] It should be noted that the elastic force transmission component 4 can be a helical compression spring, wave spring, rubber elastomer, or other compressible elastic element; no further restrictions are imposed here. It is used to deform under driving pressure and transmit the force to the gripper 3. In practical applications, the gripper 3 directly contacts and clamps the power module assembly 0. This structure can apply stable pressure to the power module assembly 0 during welding and detect the pressure in real time, solving the problem of uncontrollable clamping force in existing technologies and improving the consistency of welding quality.

[0032] It is worth noting that this invention, by setting a pair of clamping components 1 in the clamping unit and setting an elastic force transmission element 4 between the clamping base plate 2 and the gripper 3, enables the power module component 0 to obtain stable clamping pressure during the clamping process, avoiding the problem of reduced welding quality caused by unbalanced clamping pressure. The detection unit includes a pressure detection module with a pressure monitoring element 5 arranged between the elastic force transmission element 4 and the gripper 3, which can monitor the force on the elastic force transmission element 4 in real time, thereby obtaining the corresponding clamping pressure value and realizing dynamic control of the clamping pressure. Through the above structure, this invention not only improves the fixation reliability of the power module component 0 during the welding process, but also avoids pressure imbalance caused by changes in the elastic force of the elastic force transmission element 4, improves the stability and consistency of welding quality, and ensures the welding reliability of the power module component 0.

[0033] In some embodiments, the clamping unit further includes a positioning component for mounting and positioning the power module component 0.

[0034] Specifically, the positioning component is used to fix the power module assembly 0 in a preset position, and its form can be a positioning post 6, a positioning pin 7, a limiting block, or a guide pin, etc. The positioning component can cooperate with the mounting holes or limiting grooves provided on the power module assembly 0, so that the power module assembly 0 can be quickly and accurately positioned during assembly, avoiding misalignment between the gripper 3 and the module due to displacement. This structure can effectively improve the installation accuracy and reduce weld defects caused by module position displacement during welding.

[0035] In this embodiment, please refer to Figures 1-4 The positioning component includes a pair of positioning posts 6 and positioning pins 7; the positioning posts 6 are disposed on one of the clamping base plates 2, and the positioning pins 7 are disposed on the other clamping base plate 2. The positioning pins 7 pass through the power module assembly 0 and are inserted into the positioning posts 6 to achieve the installation and positioning of the power module assembly 0.

[0036] Specifically, the positioning pin 6 is fixed to one of the clamping base plates 2, and has a hole for insertion of the positioning pin 7, which is fixed to the other clamping base plate 2. The power module assembly 0 also has mounting holes. The positioning pin 7 passes through these mounting holes and is inserted into the hole of the positioning pin 6, thus forming a stable insertion and positioning. The positioning pin 7 and the positioning pin 6 can be cylindrical pins engaging with the insertion holes, or tapered pins engaging with tapered holes, ensuring stability after installation. This structure allows for automatic alignment of the power module assembly 0 during clamp closing, ensuring accurate and reliable assembly positioning between the two clamping base plates 2 and the power module assembly 0, avoiding manual alignment errors, and improving welding consistency.

[0037] In some embodiments, the clamping unit further includes a clamping pressure component for applying opposing pressure to the two clamping substrates 2 on both sides to compress the elastic force transmission member 4.

[0038] Specifically, the clamping and pressing assembly is disposed between the clamping substrates 2 to apply opposing forces, compressing the elastic force transmission element 4, thereby applying force to the power module assembly 0 through the gripper 3. This pressing assembly can take different forms such as a magnetic suction structure 8, a bolt locking mechanism, or a lever-type clamping element, or the pressing operation can be achieved through an external driving device. By providing opposing forces, this structure ensures that the gripper 3 stably clamps the power module assembly 0, meeting its welding clamping requirements.

[0039] In this embodiment, please refer to Figure 3 and Figure 4 The clamping and pressure-applying assembly includes multiple sets of magnetic attraction structures 8, each set of magnetic attraction structures 8 being evenly disposed on the surface of the clamping substrate 2, and the clamping substrate 2 on both sides is clamped by the magnetic attraction force of the magnetic attraction structures 8.

[0040] Specifically, the clamping and pressure-applying assembly includes multiple sets of magnetic attraction structures 8, each set of magnetic attraction structures 8 being evenly arranged on the surface of the clamping substrate 2. The magnetic attraction structures 8 can employ permanent magnets in conjunction with ferromagnetic components, or permanent magnets can be arranged on both sides. Through magnetic attraction, opposing clamping forces are formed between the two clamping substrates 2. This arrangement allows for automatic adsorption and positioning when the clamp closes, reducing complex fixing operations such as screws or clamps, improving assembly efficiency, and ensuring uniform distribution of clamping pressure. Applying pressure through the magnetic attraction structures 8 enables rapid assembly and uniform force application of the clamp, reducing the complexity of manual operation.

[0041] In some embodiments, please refer to Figures 1-4 The clamping base plate 2 is provided with a guide limiting shaft 9, and the gripper 3 is provided with a guide limiting hole 10. The guide limiting shaft 9 and the guide limiting hole 10 are slidably engaged.

[0042] Specifically, the clamping base plate 2 is provided with a guide limiting shaft 9, and the gripper 3 is provided with a guide limiting hole 10 that mates with it. The guide limiting shaft 9 and the guide limiting hole 10 can be clearance-fitted. After the two slide together, the horizontal movement of the gripper 3 can be restricted during its up-and-down movement. This structure ensures the stability of the elastic force transmission component 4 and the gripper 3 in the direction of force, avoids uneven force on the power module component 0 caused by the tilting of the gripper 3, and thus improves the welding reliability.

[0043] In some embodiments, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6The clamping assembly 1 includes multiple sets of clamps 3, which are evenly arranged along the length of the clamping substrate 2 to form distributed clamping pressure at multiple locations of the power module assembly 0.

[0044] Specifically, the clamping assembly 1 includes multiple sets of grippers 3, which are uniformly arranged along the length of the clamping substrate 2. The grippers 3 can be of the same size and shape and are connected to the clamping substrate 2 via their respective elastic force transmission elements 4. When the clamps close, each gripper 3 simultaneously applies force to the power module assembly 0, thereby forming distributed clamping pressure. This structure avoids excessive local stress caused by concentrated force from a single gripper 3, improving the uniformity of force on the module and the quality of the weld joints during the welding process.

[0045] In some embodiments, the pressure monitoring element 5 is a force sensor, which includes an elastomer and a resistance strain gauge, with the resistance strain gauge attached to the surface of the elastomer.

[0046] Specifically, the pressure monitoring component 5 is a force sensor, which includes an elastic body and a resistance strain gauge. The elastic body can be made of materials such as a metal sheet or a steel ring, and the resistance strain gauge is attached to its surface. An adhesive is used to fix the resistance strain gauge to the elastic body, enabling it to transmit strain, and sealant is used to protect the electronic circuitry. When subjected to the downward force of a spring, the resistance strain gauge attached to the elastic body deforms, causing a change in resistance. This change in resistance causes the Wheatstone bridge circuit to become unbalanced and output an electrical signal. In this way, accurate detection of the force on the elastic force transmission component 4 can be achieved, avoiding the problem of uncontrollable clamping pressure caused by human estimation.

[0047] In some embodiments, please refer to Figure 5 and Figure 6 The pressure detection module further includes a signal receiving device 11, which is electrically connected to the pressure monitoring element 5 and is used to receive and process the electrical signals of the pressure monitoring element 5.

[0048] Specifically, the pressure detection module also includes a signal receiving device 11, which is electrically connected to the pressure monitoring component 5 via a transmission harness 12. The signal receiving device 11 can be an industrial computer, data acquisition module, or microcontroller unit, etc., as long as it meets the corresponding usage requirements. It is used to receive and process the electrical signal output from the force sensor. After conversion, the electrical signal can be directly displayed as a numerical value or transmitted to a monitoring system to achieve real-time monitoring of the clamping pressure. This structure improves the intelligence level of the clamp, enabling real-time monitoring of the elastic force transmission component 4's elasticity, facilitating pressure adjustment to optimize welding quality; it also facilitates the identification of the elastic force transmission component 4's elasticity attenuation value, allowing for timely replacement of the elastic force transmission component 4 to reduce the risk of welding failure.

[0049] In some embodiments, please refer to Figure 7 and Figure 8 The detection unit further includes a contour detection module, which is used to detect the flatness of the surface of the gripper 3.

[0050] Specifically, the detection unit further includes a contour detection module, comprising two surface contour detection devices 13, respectively disposed on the upper and lower sides of the power module assembly 0, with their detection direction aligned with the surface of the gripper 3 on the corresponding side. The surface contour detection device 13 can employ a laser displacement detection device, an optical scanning device, or a mechanical stylus, etc., to scan the flatness of the assembled gripper 3 surface. Such contour detection module devices are existing technologies and will not be described in detail here. The detection results can be used to determine whether the gripper 3 is fully fitted with the power module, solving the problem of welding failure caused by uneven assembly of the gripper 3. This structure can detect potential assembly problems before welding, reducing welding defects such as incomplete soldering and warping, lowering the post-weld defect rate, and thus reducing manufacturing costs.

[0051] In summary, this invention, by incorporating paired clamping components within the clamping unit and an elastic force transmission element between the clamping substrate and the grippers, ensures stable clamping pressure for the power module assembly during clamping, preventing welding quality degradation caused by unbalanced clamping pressure. The detection unit includes a pressure detection module with a pressure monitoring element positioned between the elastic force transmission element and the grippers, enabling real-time monitoring of the force on the elastic force transmission element to obtain the corresponding clamping pressure value, thus achieving dynamic control and monitoring of the clamping pressure. Through this structure, this invention not only improves the fixation reliability of the power module assembly during welding but also avoids pressure imbalance caused by changes in the elastic force transmission element, enhancing the stability and consistency of welding quality and ensuring the welding reliability of the power module assembly.

[0052] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0053] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of this application. However, those skilled in the art will recognize that embodiments of this invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of this application.

[0054] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments described herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0055] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0056] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0057] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0058] The above description of the embodiments shown in this utility model (including the content in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of this application, and such modifications will be within the spirit and scope of the utility model.

[0059] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of the embodiments of this application. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring various aspects of the embodiments of this application.

Claims

1. A clamping device with a detection function, characterized in that, include: The clamping unit includes a pair of clamping components for clamping the power module assembly. Each clamping component includes a clamping base plate and a jaw. An elastic force transmission element is provided between the clamping base plate and the jaw to transmit the clamping pressure acting on the power module assembly to the jaw. The detection unit includes a pressure detection module, which is equipped with a pressure monitoring element. The pressure monitoring element is arranged between the elastic force transmission element and the gripper to monitor the force on the elastic force transmission element and obtain the corresponding clamping pressure value.

2. The clamping device with detection function according to claim 1, characterized in that, The clamping unit also includes a positioning component for installing and positioning the power module component.

3. A clamping device with detection function according to claim 2, characterized in that, The positioning component includes a pair of mating positioning posts and positioning pins; The positioning post is disposed on one of the clamping base plates, and the positioning pin is disposed on the other clamping base plate. The positioning pin passes through the power module assembly and is inserted into the positioning post to achieve the installation and positioning of the power module assembly.

4. A clamping device with detection function according to claim 1, characterized in that, The clamping unit further includes a clamping and pressure-applying component for applying opposing pressure to the clamping substrates on both sides to compress the elastic force transmission member.

5. A clamping device with detection function according to claim 4, characterized in that, The clamping and pressure-applying assembly includes multiple sets of magnetic attraction structures, each set of magnetic attraction structures being evenly disposed on the surface of the clamping substrate. The clamping substrates on both sides are clamped together by the magnetic attraction force of the magnetic attraction structures.

6. A clamping device with detection function according to claim 1, characterized in that, The clamping base plate is provided with a guide limiting shaft, and the gripper is provided with a guide limiting hole. The guide limiting shaft and the guide limiting hole are slidably engaged.

7. A clamping device with detection function according to claim 1, characterized in that, The clamping assembly includes multiple sets of grippers, which are evenly arranged along the length of the clamping substrate to form distributed clamping pressure at multiple locations of the power module assembly.

8. A clamping device with detection function according to claim 1, characterized in that, The pressure monitoring device is a force sensor, which includes an elastomer and a resistance strain gauge, with the resistance strain gauge attached to the surface of the elastomer.

9. A clamping device with detection function according to claim 1, characterized in that, The pressure detection module also includes a signal receiving device, which is electrically connected to the pressure monitoring element and is used to receive and process the electrical signals from the pressure monitoring element.

10. A clamping device with detection function according to any one of claims 1-9, characterized in that, The detection unit also includes a contour detection module, which is used to detect the flatness of the gripper surface.

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