Welding fixing mechanism
Through the design of multi-point limit cylinder and drive cylinder drive compression assembly, the problem of inaccurate positioning of NTC thermistor and PCB board is solved, high-precision and high-stability welding is achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202422450646.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-10-11
AI Technical Summary
The existing NTC thermistor welding method is difficult to ensure the accuracy of the relative position with the PCB board, resulting in insufficient welding accuracy and stability.
The PCB board is accurately positioned by a multi-point limit cylinder, and the NTC thermistor is accurately fixed at a designated position by driving the cylinder drive and compression assembly, combined with sensor detection to ensure accurate positioning.
It improves the accuracy and stability of welding, simplifies the positioning and fixing process, improves production efficiency, and is suitable for large-scale production.
Smart Images
Figure CN223265016U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of welding technology, and in particular to a welding fixing mechanism. Background Art
[0002] Due to their high temperature sensitivity and excellent thermal response characteristics, NTC thermistors are widely used in electronic circuits for applications such as temperature measurement, temperature compensation, and overheat protection. Precisely soldering the NTC thermistor to the PCB is a crucial step in the manufacturing process to ensure its full functionality. However, prior to soldering, accurately securing the NTC thermistor to the designated location on the PCB becomes a key issue in improving product consistency and reliability.
[0003] Existing NTC thermistor soldering methods typically use manual or simple fixtures to secure the NTC to the PCB. These methods typically rely on manual adjustments by the operator, placing the NTC resistor in the approximate position on the PCB and temporarily securing it with a fixture or simple fixture before proceeding with the soldering operation.
[0004] However, manual operation or simple fixing devices cannot guarantee the accuracy of the relative position between the NTC resistor and the PCB board, which may cause the NTC resistor to deviate from the specified position during soldering, thereby affecting the soldering accuracy and stability. Utility Model Content
[0005] In order to ensure the precise positioning of the NTC resistor and thus improve the accuracy and stability of welding, the present application provides a welding fixing mechanism. The present application provides the following technical solutions:
[0006] A welding fixing mechanism, comprising:
[0007] A bottom plate and a fixing plate, wherein the fixing plate is arranged above the bottom plate, and a top surface of the fixing plate is provided with a groove for placing a PCB board;
[0008] A limiting assembly is provided on the top surface of the fixing plate and is located around the groove, and is used to press the PCB board tightly into the groove;
[0009] a first driving cylinder and a cover plate, wherein the first driving cylinder is disposed on the bottom plate, a piston rod of the first driving cylinder is connected to the cover plate, and the cover plate is driven by the first driving cylinder to move above the groove and cover it tightly;
[0010] The second driving cylinder and the pressing assembly are both arranged on the cover plate, the cover plate is provided with a clearance groove, the bottom surface of the clearance groove is provided with a through hole with the same shape as the NTC thermistor, and the second driving cylinder is used to drive the pressing assembly to press the NTC thermistor.
[0011] In a specific possible implementation scheme, the limiting assembly includes a first limiting cylinder and a second limiting cylinder, and the first limiting cylinder and the second limiting cylinder are respectively located on two adjacent sides of the groove; the piston rods of the first limiting cylinder and the second limiting cylinder are both against the PCB board.
[0012] In a specific feasible implementation scheme, the limiting assembly also includes a third limiting cylinder, the piston rod of the third limiting cylinder is against the PCB board, the third limiting cylinder and the second limiting cylinder are both located on one side of the long side of the groove, and the first limiting cylinder is located on one side of the short side of the groove.
[0013] In a specific possible implementation scheme, the clamping assembly includes a fixed seat, a connecting rod and a connecting seat, the connecting seat is connected to the piston rod of the second driving cylinder, the fixed seat is hingedly arranged on the top surface of the cover plate, one end of the connecting rod is hinged to the connecting seat, and the other end of the connecting rod is hinged to the fixed seat; the fixed seat is provided with a pressure plate at one end away from the connecting rod, and the pressure plate extends into the clearance groove under the drive of the second driving cylinder and presses the NTC thermistor.
[0014] In a specific possible implementation scheme, there are two pressing plates, both of which are sheet-like structures, and the two pressing plates are symmetrically arranged with a gap between them.
[0015] In a specific possible implementation manner, the piston rod of the first driving cylinder is connected to a slider, and the top surface of the slider is connected to the cover plate.
[0016] In a specific implementation scheme, a first sensor for detecting the PCB board is provided in the groove below the PCB board, and the first sensor is a photoelectric sensor, a capacitive proximity sensor or a laser sensor.
[0017] In a specific implementation scheme, a second sensor for detecting the NTC thermistor is provided in the through hole, and the second sensor is a photoelectric sensor, a capacitive proximity sensor or a laser sensor.
[0018] In summary, the beneficial effects of this application include at least:
[0019] 1) Cylinder limiters on both the long and short sides of the groove enable precise positioning of the PCB. Simultaneously, recessed slots and through-holes in the cover allow for precise placement of the NTC thermistor. This dual positioning design effectively ensures the NTC thermistor's accurate position during soldering, avoiding positioning errors caused by manual operation or simple fixtures.
[0020] 2) By using a clamping assembly to hold the NTC thermistor in place, the stability of the NTC thermistor during soldering is ensured while providing ample space for soldering. This design avoids poor soldering quality due to component movement or misalignment, thereby improving product consistency and reliability.
[0021] 3) Through automated cylinder drive and precise positioning design, the positioning and fixing process of the NTC thermistor and PCB board is simplified. Compared with traditional manual adjustment, automated operation significantly reduces operation time and labor input, improving overall production efficiency, making it particularly suitable for applications in large-scale production environments.
[0022] First, through the cooperation of the base plate and the fixed plate, the fixed plate is arranged above the base plate, and a groove for placing the PCB board is opened on its top surface to ensure the initial positioning of the PCB board before welding. Secondly, the limiting assembly is arranged on the top surface of the fixed plate and is located on the peripheral side of the groove. The PCB board is accurately pressed into the groove by the limiting assembly, further ensuring the fixation and positioning of the PCB board. Then, the first driving cylinder is installed on the base plate, and its piston rod drives the cover plate to move to the top of the groove and performs the covering operation, so that the PCB board is stable during the welding process. Finally, by setting a clearance groove and a through hole with the same shape as the NTC thermistor on the cover plate, the second driving cylinder drives the clamping assembly to accurately press the NTC thermistor in the specified position, thereby ensuring the relative position of the NTC thermistor and the PCB board is accurate, avoiding positioning deviation caused by manual operation, and significantly improving the accuracy and stability of welding.
[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application and to implement it in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a schematic diagram of the overall structure of the welding fixing mechanism in this embodiment. Figure 1 .
[0025] Figure 2 This is a schematic diagram of the overall structure of the welding fixing mechanism in this embodiment. Figure 2 .
[0026] Figure 3 yes Figure 2 Enlarged view of part A.
[0027] Figure 4 2 is a schematic structural diagram of the cover when closed in this embodiment.
[0028] Figure numerals: 1. Base plate; 11. Support column; 2. Fixed plate; 21. Groove; 22. First limiting cylinder; 23. Second limiting cylinder; 24. Third limiting cylinder; 3. First driving cylinder; 4. Second driving cylinder; 5. Cover plate; 51. Gap groove; 52. Slider; 53. Through hole; 6. Clamping assembly; 61. Connecting seat; 62. Connecting rod; 63. Fixed seat; 64. Pressing plate; 7. PCB board; 8. First sensor; 9. Second sensor. DETAILED DESCRIPTION
[0029] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0031] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.
[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0033] The embodiment of the present application discloses a welding fixing mechanism.
[0034] Reference Figure 1 The welding fixing mechanism includes a horizontal bottom plate 1 and a fixing plate 2. The four corners of the top surface of the bottom plate 1 are fixed with vertical support columns 11. The fixing plate 2 is installed above the bottom plate 1 through the support columns 11. Figure 2 and Figure 3 The top surface of the fixing plate 2 defines a recess 21 for accommodating the PCB 7. A limiting assembly is provided on the top surface of the fixing plate 2, surrounding the recess 21. The limiting assembly comprises a first limiting cylinder 22, a second limiting cylinder 23, and a third limiting cylinder 24. These limiting cylinders are all fixedly mounted on the top surface of the fixing plate 2. When the PCB 7 is placed in the recess 21, the piston rods of the first limiting cylinder 22, the second limiting cylinder 23, and the third limiting cylinder 24 abut against the edge of the PCB 7. The first limiting cylinder 22 is located on one side of the short side of the recess 21, while the third limiting cylinder 24 and the second limiting cylinder 23 are both located on one side of the long side of the recess 21. A first sensor 8 is provided below the PCB 7 in the recess 21 to detect the presence of the PCB 7. The first sensor 8 is a photoelectric sensor, a capacitive proximity sensor, or a laser sensor. During implementation, the PCB board 7 is placed in the groove 21. After the first sensor 8 detects that the PCB board 7 is in place, the first limiting cylinder 22, the second limiting cylinder 23, and the third limiting cylinder 24 are activated to press the PCB board 7 into the groove 21 from adjacent sides. By setting cylinders on the short and long sides of the PCB board 7 for limiting, the PCB board 7 can be fixed in multiple directions simultaneously, ensuring the position stability of the PCB board 7 in the groove 21 and preventing any movement during the welding process. Because the piston rods of the cylinders directly contact the edges of the PCB board 7, the PCB board 7 can be accurately positioned when placed. Compared to the single-direction limiting method, this multi-point positioning method can more accurately fix the PCB board 7 and reduce the deviation that may occur during the welding process.
[0035] Reference Figure 1 and Figure 3 The top surface of the bottom plate 1 is installed with a horizontally arranged first driving cylinder 3, the piston rod of the first driving cylinder 3 is connected to a slider 52, and the top of the slider 52 is fixedly connected to a horizontally arranged cover plate 5, combined with Figure 4 , start the first driving cylinder 3, and the piston rod of the first driving cylinder 3 drives the cover plate 5 to move in the horizontal direction through the slider 52, thereby moving the cover plate 5 to the top of the groove 21 and closing it tightly.
[0036] Reference Figure 1 and Figure 3The top surface of the cover plate 5 is equipped with a second driving cylinder 4 and a pressing assembly 6. A clearance groove 51 is provided on the cover plate 5. The pressing assembly 6 is located on one side of the clearance groove 51. A through hole 53 with the same shape as the NTC thermistor is provided on the bottom surface of the clearance groove 51. A second sensor 9 for detecting whether the NTC thermistor exists is provided in the through hole 53. The second sensor 9 is a photoelectric sensor, a capacitive proximity sensor or a laser sensor. Figure 4 After the cover 5 is closed, the NTC thermistor is placed in the through hole 53, and the second driving cylinder 4 drives the pressing assembly 6 to press the NTC thermistor, thereby completing the precise positioning of the NTC thermistor.
[0037] Reference Figure 1 and Figure 3 The clamping assembly 6 includes a fixing seat 63, a connecting rod 62 and a connecting seat 61. The connecting seat 61 is fixedly connected to the piston rod of the second driving cylinder 4. The fixing seat 63 is hinged on the top surface of the cover plate 5 and is located in the clearance groove 51. One end of the connecting rod 62 is hinged to the connecting seat 61, and the other end of the connecting rod 62 is hinged to the fixing seat 63. The fixing seat 63 is fixedly connected to the end away from the connecting rod 62 with a pressure plate 64. There are two pressure plates 64 and both are sheet-like structures. The two pressure plates 64 are symmetrically arranged and leave a gap between each other. In practice, after the NTC thermistor is placed in the through hole 53, if the second sensor 9 detects the presence of the NTC thermistor, the second driving cylinder 4 is started, and the piston rod of the second driving cylinder 4 drives the pressure plate 64 to extend into the clearance groove 51 and press the NTC thermistor. Combined Figure 4 , at this time, the operation of fixing the NTC thermistor to the PCB board 7 before welding is completed. The two pressure plates 64 of the clamping assembly 6 adopt a sheet structure and are symmetrically arranged, leaving a certain gap when clamping. This design ensures that during the welding operation, the welding tool can enter from the gap without being hindered by the pressure plate 64, thereby avoiding interference of the clamping assembly 6 with the welding operation. In addition, the piston rod is controlled by the second driving cylinder 4 to drive the pressure plate 64 into the clearance groove 51, and the NTC thermistor is accurately pressed on the PCB board 7. The hinged design of the fixing seat 63, the connecting rod 62 and the connecting seat 61 ensures that the pressure plate 64 can apply pressure stably and evenly, ensuring that the NTC thermistor is in a stable state before welding and will not affect the welding quality due to position offset.
[0038] In summary, the design of a sophisticated mechanical structure and automated control system addresses the difficulty of ensuring the relative position accuracy between the NTC thermistor and the PCB, a problem faced by traditional manual operation or simple fixtures. Specifically, the solution employs a multi-point limit cylinder to precisely position the PCB, ensuring that it does not move during the welding process. Simultaneously, a second drive cylinder 4 drives the clamping assembly 6 to precisely secure the NTC thermistor to the PCB, avoiding potential resistor position shifts during manual operation and ensuring welding accuracy and stability. This design not only improves welding quality but also increases production efficiency, meeting the high-precision and high-reliability requirements of modern production.
[0039] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A welding fixing mechanism, characterized in that: include: A bottom plate and a fixing plate, wherein the fixing plate is arranged above the bottom plate, and a top surface of the fixing plate is provided with a groove for placing a PCB board; A limiting assembly is provided on the top surface of the fixing plate and is located around the groove, and is used to press the PCB board tightly into the groove; a first driving cylinder and a cover plate, wherein the first driving cylinder is disposed on the bottom plate, a piston rod of the first driving cylinder is connected to the cover plate, and the cover plate is driven by the first driving cylinder to move above the groove and cover it tightly; The second driving cylinder and the pressing assembly are both arranged on the cover plate, the cover plate is provided with a clearance groove, the bottom surface of the clearance groove is provided with a through hole with the same shape as the NTC thermistor, and the second driving cylinder is used to drive the pressing assembly to press the NTC thermistor.
2. The welding fixing mechanism according to claim 1, characterized in that: The limiting assembly includes a first limiting cylinder and a second limiting cylinder, and the first limiting cylinder and the second limiting cylinder are respectively located on two adjacent sides of the groove; the piston rods of the first limiting cylinder and the second limiting cylinder are both against the PCB board.
3. The welding fixing mechanism according to claim 2, characterized in that: The limiting assembly also includes a third limiting cylinder, the piston rod of the third limiting cylinder is against the PCB board, the third limiting cylinder and the second limiting cylinder are both located on one side of the long side of the groove, and the first limiting cylinder is located on one side of the short side of the groove.
4. The welding fixing mechanism according to claim 1, characterized in that: The clamping assembly includes a fixed seat, a connecting rod and a connecting seat. The connecting seat is connected to the piston rod of the second driving cylinder. The fixed seat is hinged on the top surface of the cover plate. One end of the connecting rod is hinged to the connecting seat, and the other end of the connecting rod is hinged to the fixed seat. A pressure plate is provided at the end of the fixed seat away from the connecting rod. When driven by the second driving cylinder, the pressure plate extends into the clearance groove and presses the NTC thermistor.
5. The welding fixing mechanism according to claim 4, characterized in that: There are two pressing plates, both of which are sheet-like structures. The two pressing plates are symmetrically arranged with a gap between them.
6. The welding fixing mechanism according to claim 1, characterized in that: The piston rod of the first driving cylinder is connected with a slider, and the top surface of the slider is connected to the cover plate.
7. The welding fixing mechanism according to claim 1, characterized in that: A first sensor for detecting the PCB board is provided in the groove below the PCB board. The first sensor is a photoelectric sensor, a capacitive proximity sensor or a laser sensor.
8. The welding fixing mechanism according to claim 1, characterized in that: A second sensor for detecting the NTC thermistor is provided in the through hole, and the second sensor is one of a photoelectric sensor, a capacitive proximity sensor or a laser sensor.