Clamp device for dynamic test of single-tube power device
By designing a fixture device, the device is automatically transported to the test platform, shortening the power circuit distance, and being compatible with a variety of devices. This solves the problems of large stray inductance and device damage caused by the long pins of traditional aging sockets, and enables efficient and accurate dynamic testing of single-tube power devices.
Patent Information
- Application Number
- CN202423120322.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-17
AI Technical Summary
Traditional aging sockets have long pins, resulting in large stray inductance, which affects test accuracy. They are also incompatible with single-tube power devices of various sizes and are prone to damaging devices, thus lacking applicability and flexibility.
A clamping device was designed, including a support base, a slide, a rodless cylinder, a follower plate, a sliding pin, a connecting rod, and a carrier plate mechanism. It automatically transports devices to the test platform, shortens the power loop distance, is compatible with various device types, and uses friction to fix the devices and avoid damage.
It reduces stray inductance during the testing process, improves testing accuracy, is suitable for full inspection, is easy to operate, highly automated, has good compatibility, and prevents device damage.
Smart Images
Figure CN223756858U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of semiconductor device test auxiliary frock, especially a kind of fixture device for single-tube power device dynamic test. BACKGROUND
[0002] The dynamic parameter test method of power semiconductor device is crucial for evaluating its performance, among which double-pulse test and short-circuit test are two commonly used test methods, which can accurately measure the performance characteristics of power semiconductor device under specific working conditions, and can comprehensively evaluate the key parameters such as switching speed, power consumption, efficiency and stability of the device, providing basis for optimization design.
[0003] In the conventional technology, in order to facilitate the dynamic parameter test of single-tube power device (such as TO247, TO263 and other packaging types), an aging seat directly welded on the test equipment is usually used as a test fixture, and the device to be tested is connected to the corresponding test equipment.
[0004] However, the above conventional technology has the following problems:
[0005] (1) Since the pins of the aging seat are long, they will generate a large stray inductance in the power loop, affecting the accuracy of the test results, and in severe cases, the device under test may even be damaged;
[0006] (2) One aging seat cannot be compatible with single-tube power devices of multiple sizes, limiting the flexibility and application range of the test equipment;
[0007] (3) The device under test is inserted into the aging seat, which may cause damage to the device itself to some extent, and is not suitable for full inspection, and is usually only suitable for laboratory detection verification or sampling detection. INVENTION CONTENTS
[0008] In view of the above-mentioned shortcomings in the existing production technology, the applicant provides a fixture device for dynamic test of single-tube power device, which can effectively reduce the inductance during detection, has good compatibility, high flexibility and is suitable for full inspection of the device.
[0009] The technical solution adopted by the utility model is as follows:
[0010] A fixture device for dynamic test of single-tube power device, comprising a support seat, the support seat is provided with a working end face extending in vertical direction, a sliding slot is formed in the working end face, a rodless cylinder is fixed on the working end face beside the sliding slot;
[0011] The sliding pin is slidably installed in the sliding groove, the output end of the rodless cylinder is connected with a follower plate, a rotating shaft is rotatably installed on the follower plate, the axial direction of the rotating shaft is perpendicular to the working end face, one end of the rotating shaft is fixed with one end of a connecting rod, the other end of the connecting rod is rotatably installed with the sliding pin, and the other end of the rotating shaft is rotatably installed with a carrier disc mechanism used for clamping devices, the rodless cylinder drives the follower plate to move linearly in the vertical direction, and the follower plate drives the sliding pin to slide along the track of the sliding groove through the rotating shaft.
[0012] During the sliding of the sliding pin, the connecting rod compensates the change of the vertical interval distance between the sliding pin and the rodless cylinder, so that the connecting rod rotates, the carrier disc mechanism is driven to rotate by the rotating shaft of the rotating connecting rod, and devices are transported.
[0013] As a further improvement of the above technical scheme:
[0014] The output end of the rodless cylinder is connected with a connecting plate, and the connecting plate is fixed with the follower plate.
[0015] A sliding rail assembly is rotatably installed between the follower plate and the working end face.
[0016] The sliding rail assembly comprises a sliding rail fixed on the working end face and a sliding block fixed on the follower plate.
[0017] A stopper assembly used for limiting the follower plate is rotatably installed on the working end face.
[0018] The sliding groove comprises a first straight line segment, a second straight line segment and a third straight line segment arranged in sequence in the vertical direction, the vertical distance between the first straight line segment and the rodless cylinder is equal to the vertical distance between the third straight line segment and the rodless cylinder, the vertical distance between the second straight line segment and the rodless cylinder is greater than the vertical distance between the first straight line segment and the rodless cylinder, the first straight line segment and the second straight line segment are connected through a first inclined segment, and the second straight line segment and the third straight line segment are connected through a second inclined segment.
[0019] The rotating shaft is rotatably installed on the follower plate through a bearing.
[0020] The carrier disc mechanism comprises a fixed plate, a heat insulation plate, a heating plate group, a carrier plate and a limiting plate installed in sequence, the heating plate group generates heat through electricity, so as to heat the devices on the carrier plate, a plurality of through grooves are formed on the end face of the carrier plate, each through groove is used for placing a device, the limiting plate extends along the arrangement direction of the through grooves and abuts against the devices in the through grooves, so as to limit and fix the devices in the through grooves based on the friction.
[0021] Each through groove comprises a first accommodating groove and a second accommodating groove arranged in sequence, and the depth of the first accommodating groove is greater than that of the second accommodating groove.
[0022] The limiting protrusion is arranged in the single second accommodating groove.
[0023] The utility model discloses the advantages are as follows:
[0024] The utility model discloses compact, reasonable, convenient operation passes through setting support seat, sliding slot, rodless cylinder, follower plate, sliding pin, connecting rod, pivot can automatically transport device to the test work position of test platform, guarantee that the test probe on test platform can directly contact with the pin on device, thereby shortening power loop distance, reducing the stray inductance in detection process, improve detection accuracy, simultaneously, pass through setting the disc mechanism, can compatible multiple types single -tube power device, and through the friction between contact surface to device limiting fixed, can avoid device damage, suitable for full detection working condition.
[0025] The utility model also has the following advantages:
[0026] (1) under the action of rodless cylinder, the disc mechanism can complete 0-180 degree between arbitrary angle hovering, and convenient operation personnel can replace detection device quickly, convenient operation, high degree of automation. Effectively promote detection efficiency.
[0027] (2) through setting pin hole, can improve continuous detection use precision.
[0028] (3) the connection between parts is connected through screw thread, and the interchangeability is high, and the connection performance is stable. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 It is the structural schematic diagram of the utility model.
[0030] Figure 2 It is the explosion drawing of the utility model.
[0031] Figure 3 It is the schematic diagram of the disc mechanism in the utility model in working condition.
[0032] Figure 4 It is the explosion drawing of the disc mechanism in the utility model.
[0033] Figure 5 It is the schematic diagram of the utility model in working condition Figure 1 .
[0034] Figure 6 It is the schematic diagram of the utility model in working condition Figure 2 .
[0035] Figure 7 It is the schematic diagram of the utility model in working condition Figure 3 .
[0036] Figure 8 Schematic diagram of the utility model in working state Figure 4
[0037] Wherein: 1, support seat, 2, working end face, 3, sliding groove, 4, stopper assembly, 5, slide rail assembly, 6, carrier disc mechanism, 7, connecting plate, 8, rodless cylinder, 9, follower plate, 10, boom, 11, sliding pin, 12, connecting rod, 13, rotating shaft, 14, bearing, 15, device;
[0038] 301, first straight line segment, 302, second straight line segment, 303, third straight line segment, 304, first inclined segment, 305, second inclined segment;
[0039] 601, fixed plate, 602, heat insulation plate, 603, heating plate group, 604, limiting plate, 605, carrier plate, 606, limiting bump, 607, pin hole, 608, first accommodating groove, 609, second accommodating groove, 610, sensor, 611, heating rod. DETAILED DESCRIPTION
[0040] The specific implementation of the utility model will be described below in combination with the drawings.
[0041] The structure and function of the utility model are as follows:
[0042] As Figure 1As shown, a kind of fixture device for single-tube power device dynamic test, including support seat 1, support seat 1 is provided with the working end surface 2 extending along vertical direction, sliding slot 3 is opened in working end surface 2, and no-rod pneumatic cylinder 8 is fixed on the working end surface 2 of the side of sliding slot 3;Sliding pin 11 is slidably installed in sliding slot 3, the output end of no-rod pneumatic cylinder 8 is connected with follow-up plate 9, follow-up plate 9 is rotatably installed with rotating shaft 13, the axial direction of rotating shaft 13 is perpendicular to working end surface 2, one end of rotating shaft 13 is fixed with one end of connecting rod 12, the other end of connecting rod 12 is rotatably installed with sliding pin 11, the other end of rotating shaft 13 is cooperatively installed with carrier disc mechanism 6, carrier disc mechanism 6 is used for clamping device 15, no-rod pneumatic cylinder 8 drives follow-up plate 9 to move linearly along vertical direction, and follow-up plate 9 drives sliding pin 11 to slide along the track of sliding slot 3 by rotating shaft 13;During the sliding process of sliding pin 11, the amount of change of the vertical interval distance between sliding pin 11 and no-rod pneumatic cylinder 8 is compensated by connecting rod 12, so that connecting rod 12 rotates, and rotating connecting rod 12 drives carrier disc mechanism 6 to rotate by rotating shaft 13, so that device 15 is transported.By setting support seat 1, sliding slot 3, no-rod pneumatic cylinder 8, follow-up plate 9, sliding pin 11, connecting rod 12 and rotating shaft 13, device 15 can be automatically transported to the test working position of test platform, so that the test probe on the test platform can be directly contacted with the pin on device 15, thereby shortening the power loop distance, reducing the stray inductance in the detection process, and improving the detection accuracy;Meanwhile, by setting carrier disc mechanism 6, multiple types of single-tube power devices can be compatible, and device 15 is limited and fixed by the friction force between contact surfaces, so that device 15 can be prevented from being damaged, and it is suitable for full detection working condition.
[0043] The fixture device of the utility model is installed in test equipment, and the test equipment includes a test platform, which is the main structure of the test equipment, and a test circuit module is installed on the test platform in cooperation, the test circuit module includes test probes, and the test probes are electrically connected with the pins of device 15 to complete the performance test of device 15;In the utility model, the test working position is formed by opening holes in the test platform, the test probes are arranged in the test working position, and device 15 is turned over by carrier disc mechanism 6, so that the test probes can abut against the pins of device 15 when device 15 enters the test working position, thereby realizing electrical connection through direct contact with the pins, and further reducing the stray inductance in the test process. By setting the test working position, device 15 can be sunk in the equipment during the test process, thereby providing omnidirectional wrapping protection for device 15 and preventing device 15 from being damaged during the test process to cause injury events.
[0044] In order to ensure that carrier disc mechanism 6 can be aligned with the test working position, positioning pins are installed on both sides of the test working position, which are used in cooperation with the pin holes 607 on carrier disc mechanism 6, so that carrier disc mechanism 6 can accurately transport device 15 to the test working position.
[0045] The support base 1 is used to support the tray mechanism 6 and its motion drive components. A reinforcing plate is installed on the support base 1 to improve the structural strength of the support base 1. The working end face 2 is arranged in the vertical direction, and a sliding groove 3 is opened on its end face. By setting the sliding groove 3, the movement trajectory of the sliding pin 11 can be guided, and the vertical distance between the sliding pin 11 and the rodless cylinder 8 can be adjusted. The change in the vertical distance is compensated by the connecting rod 12, thereby driving the connecting rod 12 to rotate.
[0046] To ensure that link 12 can perform a 0-180° rotational motion, such as Figure 2 As shown, the slide 3 includes a first straight segment 301, a second straight segment 302, and a third straight segment 303 arranged sequentially in the vertical direction. The vertical distance between the first straight segment 301 and the rodless cylinder 8 is equal to the vertical distance between the third straight segment 303 and the rodless cylinder 8. The vertical distance between the second straight segment 302 and the rodless cylinder 8 is greater than the vertical distance between the first straight segment 301 and the rodless cylinder 8. The first straight segment 301 and the second straight segment 302 are connected by a first inclined segment 304, and the second straight segment 302 and the third straight segment 303 are connected by a second inclined segment 305. The first inclined segment 304 and the second inclined segment 305 are perpendicular to each other.
[0047] A limiter assembly 4 for limiting the movement of the follower plate 9 is installed on the working end face 2. The movement distance of the follower plate 9 is limited by the limiter 4. The end of the limiter 4 is made of polyurethane material as a buffer to prevent the follower plate 9 from colliding with other metal parts during movement, which would cause the device to vibrate or make abnormal noise.
[0048] The output end of the rodless cylinder 8 is connected to the connecting plate 7, and the connecting plate 7 is fixed to the follower plate 9. The rodless cylinder 8 provides power for the flipping motion of the tray mechanism 8. Through the connecting plate 7, it drives the follower plate 9 to move linearly along the slide rail, thereby driving the sliding pin 11 to move in translational motion along the track of the slide groove 3, which in turn drives the connecting rod 12 to rotate. The connecting rod 12 drives the rotating shaft 13 to rotate, and the rotating shaft 13 drives the tray mechanism 6 to rotate through the lifting arm 13. The lifting arm 13 is L-shaped and is used to realize the connection between the rotating shaft 13 and the tray mechanism 6.
[0049] A slide rail assembly 5 is installed between the follower plate 9 and the working end face 2. The slide rail assembly 5 includes a slide rail fixed on the working end face 2 and a slider fixed on the follower plate 9. The slider and the slide rail cooperate with each other to improve the motion stability of the follower plate 9.
[0050] The rotating shaft 13 is rotatably mounted to the follower plate 9 via the bearing 14. A through hole is provided on the end face of the follower plate 9, and the bearing 14 is fitted into the through hole. The follower plate 9 is rotatably mounted to the rotating shaft 13 via the bearing 14.
[0051] The two ends of the rotating shaft 13 are fixed with the connecting rod 12 and the boom 13 respectively, and the connecting rod 12 is in rotational cooperation with the sliding pin 11, so that the connecting rod 12 can rotate relative to the sliding pin 11 when the movement track of the sliding pin 11 is changed.
[0052] As shown in Figures 3-4 The structure of the carrier plate mechanism 6 is shown in the figure, which comprises a fixed plate 601, a heat insulation plate 602, a heating plate set 603, a carrier plate 605 and a limiting plate 604 which are sequentially attached, the heating plate set 603 is powered to generate heat, thereby heating the devices 15 on the carrier plate 605, a plurality of through grooves are formed on the end face of the carrier plate 605, a single through groove is used to place a device 15, the limiting plate 604 extends along the arrangement direction of the through grooves and is attached to the devices 15 in the through grooves, thereby limiting and fixing the devices 15 in the through grooves based on the friction force. The fixed plate 601 is used to be fixed with the boom 13; the heat insulation plate 602 is used to avoid the influence of the heating temperature of the heating plate set on the fixed plate 601, and is conducted to the follow-up plate 9 and the rodless cylinder 8 through the fixed plate 601, thereby affecting the working performance of the device; the heating plate set 603 is used to heat the carrier plate 605, thereby increasing the ambient temperature of the devices 15 based on heat conduction, and further providing a temperature-adjustable test environment for the devices 15; the limiting plate 604 is used to press the devices 15 in the through grooves, and the devices 15 are fixed in the corresponding through grooves through the friction force between the end face of the limiting plate 604 and the injection molded shell of the devices 15.
[0053] A single through groove comprises a first accommodating groove 608 and a second accommodating groove 609 which are arranged in series, the depth of the first accommodating groove 608 is greater than that of the second accommodating groove 609, the first accommodating groove 908 can accommodate the injection molded shell part of the device 15, and the second accommodating groove 609 can accommodate the pin part of the device 15.
[0054] In order to improve the fixing effect of the carrier plate 605 on the devices 15, a limiting protrusion 606 is arranged in a single second accommodating groove 609, the limiting protrusion 606 is clamped into two pins of the corresponding device 15, thereby effectively preventing the device 15 from falling out of the corresponding through groove.
[0055] The heating plate set 603 comprises a first heating plate and a second heating plate which cooperate with each other, at least one heating rod 611 is arranged between the first heating plate and the second heating plate, a single heating rod 611 is electrically connected with an external power supply, the heating rod 611 is powered to generate heat, thereby causing the first heating plate and the second heating plate to generate heat. The carrier plate 605 is uniformly heated by the first heating plate, thereby ensuring that the devices 15 are uniformly heated; at least one temperature sensor 610 is further arranged between the first heating plate and the second heating plate. The temperature sensor 610 transmits real-time temperature signals to a temperature controller, thereby controlling the temperature of the heating rod 611 through the temperature controller, and ensuring that the heating plate set can realize rapid compensation between room temperature and 200℃.
[0056] In addition, mounting slots for mounting the heating rod 611 and the temperature sensor 610 are provided on the end faces where the first heating plate and the second heating plate meet.
[0057] Several pin holes 607 are formed on the end face of the first heating plate. The pin holes 607 correspond to the positioning pins. When the positioning pin is inserted into the corresponding pin hole 607, it indicates that the carrier plate mechanism 6 has moved into place. At this time, the device 15 on the carrier plate mechanism 6 sinks into the test working position and abuts against the corresponding test probe to achieve electrical connection.
[0058] The working process of this utility model is as follows:
[0059] First, the rodless cylinder 8 is in its initial position, such as... Figure 5 As shown, at this time, the through slot on the carrier plate 605 of the carrier plate mechanism 6 faces upward. The operator puts the device 15 into the through slot, ensuring that the limiting plate 604 is in close contact with the injection molded shell of the device 15. At the same time, it ensures that two of the pins of the device 15 are in close contact with the outer wall of the limiting protrusion 606.
[0060] Subsequently, the rodless cylinder 8 descends vertically, as... Figures 6-8 As shown, under the driving action of the rodless cylinder 8, the connecting plate 11 drives the follower plate 9 to make a downward linear motion in the vertical direction. At the same time, the follower plate 9 drives the sliding pin 11 to make a translational motion along the third straight segment 303, the second inclined segment 305, the second straight segment 302, the first inclined segment 304, and the first straight segment 301 of the slide groove 3.
[0061] like Figure 6 As shown, when the sliding pin 11 slides past the second inclined section 305, the connecting rod 12 begins to rotate clockwise, thereby driving the carrier mechanism 6 to rotate via the rotating shaft 13; as Figure 7 As shown, when the sliding pin 11 moves to the second straight segment 302, the vertical distance between the sliding pin 11 and the rodless cylinder 8 is the greatest, the connecting rod 12 rotates to a horizontal state, and the carrier plate mechanism 6 rotates to 90°; as Figure 8 As shown, when the sliding pin 11 slides past the first inclined section 304, the connecting rod 12 continues to rotate clockwise, thereby driving the tray mechanism 6 to rotate through the rotating shaft 13; until the sliding pin 11 slides into the first straight section 301, the tray mechanism 6 completes a 180° rotation, so that the through groove on the tray 605 of the tray mechanism 6 faces downward.
[0062] Next, the sliding pin 11 continues to slide along the first straight segment 301, driving the carrier mechanism 6 to make a downward linear motion in the vertical direction until the pin hole 607 and the positioning pin 2 are connected. At this time, the device 15 on the carrier mechanism 6 sinks into the test working position and abuts against the corresponding test probe to achieve electrical connection.
[0063] The test platform is powered on to start testing the device 15, and during the testing, when high-temperature related performance testing is required, the heating rod 611 can be powered on to generate heat, thereby realizing testing of the device 15 under high temperature.
[0064] The above description is an explanation of the utility model, not a limitation of the utility model, the range defined by the utility model is referred to the claim, and any form of modification can be made within the protection scope of the utility model.
Claims
1. A fixture device for dynamic testing of single-tube power devices, characterized in that: Including support seat (1), be provided with along vertical direction extension work end face (2) on support seat (1), work end face (2) on set up slide groove (3), the slide groove (3) one side work end face (2) on fixed rodless cylinder (8); The slide groove (3) is slidably installed with a slide pin (11), the output end of the rodless cylinder (8) is connected with a follower plate (9), the follower plate (9) is rotatably installed with a rotating shaft (13), the axial direction of the rotating shaft (13) is perpendicular to the work end face (2), one end of the rotating shaft (13) is fixed with one end of a connecting rod (12), the other end of the connecting rod (12) is rotatably installed with the slide pin (11), the other end of the rotating shaft (13) is cooperatively installed with a carrier disc mechanism (6), the carrier disc mechanism (6) is used for clamping a device (15), the rodless cylinder (8) drives the follower plate (9) to move linearly in the vertical direction, the follower plate (9) drives the slide pin (11) to slide along the track of the slide groove (3) through the rotating shaft (13). During the sliding process of the slide pin (11), the connecting rod (12) compensates the change amount of the vertical spacing distance between the slide pin (11) and the rodless cylinder (8), so that the connecting rod (12) rotates, and the carrier disc mechanism (6) is driven to rotate by the rotating shaft (13), so that the device (15) is transported.
2. A fixture apparatus for dynamic testing of a single-die power device as recited in claim 1, wherein: The output end of the rodless cylinder (8) is connected with a connecting plate (7), and the connecting plate (7) is fixed with the follower plate (9).
3. The fixture device for dynamic testing of a single-tube power device as described in claim 1, characterized in that: The follower plate (9) and the work end face (2) are cooperatively installed with a slide rail assembly (5).
4. The fixture apparatus for dynamic testing of a single-die power device of claim 3, wherein: The slide rail assembly (5) includes a slide rail fixed on the work end face (2) and a slide block fixed on the follower plate (9).
5. The fixture apparatus for dynamic testing of a single transistor power device of claim 1, wherein: the plurality of pins are arranged in a circular pattern; and the plurality of pins are arranged in a circular pattern with the plurality of pins being equally spaced apart from each other. 5 The work end face (2) is cooperatively installed with a limiter assembly (4) for limiting the follower plate (9).
6. The fixture apparatus for dynamic testing of a single transistor power device of claim 1, wherein: The slide groove (3) includes a first straight line segment (301), a second straight line segment (302) and a third straight line segment (303) arranged in sequence in the vertical direction, the vertical distance between the first straight line segment (301) and the rodless cylinder (8) is equal to the vertical distance between the third straight line segment (303) and the rodless cylinder (8), the vertical distance between the second straight line segment (302) and the rodless cylinder (8) is greater than the vertical distance between the first straight line segment (301) and the rodless cylinder (8), the first straight line segment (301) and the second straight line segment (302) are connected through a first inclined segment (304), and the second straight line segment (302) and the third straight line segment (303) are connected through a second inclined segment (305).
7. The fixture apparatus for dynamic testing of a single transistor power device of claim 1, wherein: the plurality of pins are arranged in a circular pattern; and the plurality of pins are arranged in a circular pattern with the plurality of pins being equally spaced apart from each other. The rotating shaft (13) is rotatably installed with the follower plate (9) through a bearing (14).
8. A fixture device for dynamic testing of a single-tube power device as described in claim 1, characterized in that: The structure of the carrier disc mechanism (6) comprises a fixing plate (601), a heat insulation plate (602), a heating plate set (603), a carrier plate (605) and a limiting plate (604) which are sequentially attached, the heating plate set (603) is electrified to generate heat, thereby heating the device (15) on the carrier plate (605), a plurality of through grooves are formed on the end face of the carrier plate (605), a single through groove is used for placing the device (15), the limiting plate (604) extends along the arrangement direction of the through grooves and is attached to the device (15) in the through grooves, thereby limiting and fixing the device (15) in the through grooves based on the friction.
9. A fixture apparatus for dynamic testing of a single-die power device as recited in claim 8, wherein: A single through groove comprises a first accommodating groove (608) and a second accommodating groove (609) which are arranged in series, the depth of the first accommodating groove (608) is greater than that of the second accommodating groove (609).
10. The fixture apparatus for dynamic testing of a single-die power device of claim 8, wherein: A limiting protrusion (606) is arranged in a single second accommodating groove (609).