Pressure sensor protection device for splitting clamp

Abstract

The utility model relates to the technical field of clamp devices, in particular to a pressure sensor protection device for a split clamp. Comprising an electric cylinder; the pressure sensor is connected to the bottom of the electric cylinder; the sliding blocks are used for bearing radial force and are arranged on two sides of the pressure sensor; the ejector pin mechanism is slidably connected with the sliding block, the ejector pin mechanism comprises an ejector pin located below the pressure sensor, and the ejector pin is driven by an electric cylinder to do lifting motion in the vertical direction; the module is arranged below the ejector pin mechanism; uncontrollable radial force borne by the pressure sensor in actual work is transmitted to the sliding blocks on the two sides, the pressure sensor only bears axial force, the effects of protection and service life prolonging are achieved, and the situation that the production capacity is affected due to long replacement and debugging time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of clamp devices, in particular to a split clamp pressure sensor protection device. Background Art

[0002] The power module is a module that is encapsulated by combining power electronic devices according to certain functional combinations. It is an advanced hybrid integrated power component with an insulated gate bipolar transistor (IGBT) as the core, and is composed of a high-speed, low-power die, an optimized gate drive circuit, and a fast protection circuit. The assembly of the power module is also one of its very important processes. After the reflow soldering, the module positioning fixture must be removed, the module and the fixture must be separated, and the module must be processed separately for the next step, and the fixture must be reused. The existing technology is an automatic disassembly fixture, which improves the situation that after the reflow soldering process, the module and the fixture will be stuck together with flux and other materials, and the manual disassembly fixture will be unevenly stressed, the module will be disassembled and deformed, the operation efficiency is low, the flatness is poor, and the consistency is poor. Automatic disassembly also needs to consider that the module force cannot exceed a certain value. An electric cylinder automatic disassembly mechanism with a pressure sensor is used. However, during use, the pressure sensor is frequently damaged in a short period of time due to the uncertainty of the bonding force between the fixtures and the unstable force conditions, which seriously affects the production efficiency.

[0003] The existing technology uses an electric cylinder automatic disassembly welding fixture mechanism, and a pressure sensor is installed on the head of the electric cylinder to control the downward pressure of the ejector pin to not exceed the set maximum value. However, the pressure sensor is not protected only by axial force. As a result, during the actual disassembly process, the pressure sensor does not work in the theoretical state (only by the vertical upward axial force), but is also affected by the horizontal component force, which makes the pressure sensor easily damaged and requires replacement and debugging, which takes a long time and affects production capacity. Utility Model Content

[0004] The purpose of the utility model is to provide a split fixture pressure sensor protection device to solve the above technical problems;

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A split fixture pressure sensor protection device, comprising:

[0007] Electric cylinder;

[0008] A pressure sensor connected to the bottom of the electric cylinder;

[0009] Slide blocks for bearing radial force, disposed on both sides of the pressure sensor;

[0010] An ejector mechanism is slidably connected to the slider, the ejector mechanism comprises an ejector located below the pressure sensor, and the ejector moves up and down in a vertical direction based on the electric cylinder;

[0011] The module is arranged below the ejector mechanism.

[0012] Preferably, the ejector mechanism comprises:

[0013] A connecting block slidably connected to the sliding block;

[0014] An ejector seat plate connected to the lower end of the connecting block;

[0015] The ejector pin is connected to the lower surface of the ejector pin seat plate.

[0016] Preferably, the slider is connected to the pressure sensor via a slider seat, and the slider comprises a slide rail vertically arranged on a side of the slider seat and a slide block slidably connected to the slide rail.

[0017] Preferably, it also includes a limit screw, which is arranged between the slider seat and the connecting block.

[0018] Preferably, it also includes a slider limit block, which is arranged at the bottom of the slide rail.

[0019] Preferably, it further comprises a conductive force top block, which is arranged between the ejector seat plate and the pressure sensor, wherein the lower surface of the conductive force top block contacts the ejector seat plate, and the upper surface of the conductive force top block contacts the pressure sensor.

[0020] Preferably, the lower surface of the conductive top block is a spherical structure.

[0021] Preferably, a limit frame is further included, the module is detachably connected to the limit frame, the limit frame is provided with a through hole corresponding to the position of the ejector pin, and the module is separated from the limit frame by the ejector pin passing through the through hole and pressing the module downward.

[0022] Preferably, it further comprises a module seat, which is arranged below the limiting frame, and the module is located between the limiting frame and the module seat.

[0023] Preferably, it further comprises a fixture base, wherein the module seat and the limit frame are both located in the fixture base, and the module seat is located between the module and the bottom surface of the fixture base.

[0024] The beneficial effects of the utility model are as follows: due to the adoption of the above technical scheme, the utility model transmits the uncontrollable radial force on the pressure sensor in actual work to the sliders on both sides, and the pressure sensor is only subjected to axial force, which plays a role in protecting and extending the service life and avoiding the impact of long replacement and debugging time on production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure before the module is disassembled in the embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure after the modules are disassembled in the embodiment of the utility model;

[0027] Figure 3 This is a schematic diagram of the overall structure of the split clamp pressure sensor protection device in the embodiment of the utility model;

[0028] Figure 4 It is a front view of the split clamp pressure sensor protection device in the embodiment of the utility model;

[0029] Figure 5 It is a side view of the split clamp pressure sensor protection device in the embodiment of the utility model;

[0030] Figure 6 This is a structural schematic diagram of a slider seat in an embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the slider in the embodiment of the utility model;

[0032] Figure 8 This is a schematic diagram of the structure of the slider limit block in the embodiment of the utility model;

[0033] Fig. 9 This is a structural schematic diagram of a connecting block in an embodiment of the utility model;

[0034] Fig.10 This is a schematic diagram of the structure of the ejector seat plate in the embodiment of the utility model;

[0035] Fig.11 This is a schematic diagram of the structure of the ejector pin in the embodiment of the utility model;

[0036] Fig.12 This is a schematic diagram of the structure of the limit frame in the embodiment of the utility model;

[0037] Fig.13 This is a schematic diagram of the structure of the module seat in the embodiment of the utility model;

[0038] Fig.14 This is a schematic diagram of the structure of the clamp base in the embodiment of the utility model;

[0039] Fig.15 This is a schematic diagram of the structure of the conductive force top block in the embodiment of the utility model;

[0040] Fig.16 This is a schematic diagram of the state before disassembly in the embodiment of the utility model;

[0041] Fig.17 This is a schematic diagram of the state in which the ejector pin contacts the module during the disassembly of the embodiment of the utility model;

[0042] Fig.18 It is a schematic diagram of the disassembled state in the embodiment of the utility model.

[0043] In the attached figure: 1. electric cylinder; 2. slider seat; 3. slider; 4. pressure sensor; 5. slider limit block; 6. connecting block; 7. ejector seat plate; 8. ejector; 9. limit frame; 10. module; 11. module seat; 12. fixture base; 13. conduction force ejector block; 14. limit screw; 15. ejector mechanism. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0047] A split fixture pressure sensor protection device, such as Figures 1 to 18 As shown, including,

[0048] Electric cylinder 1;

[0049] The pressure sensor 4 is connected to the bottom of the electric cylinder 1;

[0050] Slide blocks 3 for bearing radial forces are arranged on both sides of the pressure sensor 4;

[0051] The ejector mechanism 15 is slidably connected to the slider 3. The ejector mechanism 15 includes an ejector 8 located below the pressure sensor 4. The ejector 8 is driven by the electric cylinder 1 to move up and down in the vertical direction.

[0052] The module 10 is disposed below the ejector mechanism 15 .

[0053] Specifically, the module 10 to be split in the present invention may be a power module 10 but is not limited to the power module 10. Of course, the module 10 to be split that the present invention can be applied to is not only the above-mentioned one, but also other similar structures.

[0054] Specifically, the pressure sensor 4 is used to receive the actual magnitude of the reaction force exerted by the ejector pin 8 on the module 10, control the magnitude of the force exerted when the ejector pin 8 is disassembled, and protect the module 10. Figure 2 The pressure sensor 4 is a standard part, and can only bear the force in the vertical direction when measuring the force, and cannot bear the force in other directions. If there is force in other directions, the pressure sensor 4 is easily damaged.

[0055] Specifically, the mechanism connected to the ejector pin 8 moves downward under the action of the electric cylinder 1, passes through the through hole of the limit frame 9 and contacts the module 10; the mechanism connected to the ejector pin 8 continues to move downward under the action of the electric cylinder 1 until the module 10 is pushed downward out of the limit frame 9. During this movement, the module 10 will not always be in a theoretical vertical downward position, and may tilt downward due to uneven force on all sides. In this way, the ejector pin 8 will transmit the horizontal component of force, that is, the radial force, upward. Due to the horizontal limitation of the slider 3, most of the radial force is borne by the slider 3, while the vertical component of force, that is, the axial force is transmitted to the axis of the pressure sensor 4. The utility model transmits the uncontrollable radial force on the pressure sensor 4 in actual work to the sliders 3 on both sides, and the pressure sensor 4 is no longer subjected to the radial force, thereby protecting and extending the service life.

[0056] In a preferred embodiment, the ejector mechanism 15 includes:

[0057] A connecting block 6 is slidably connected to the slider 3;

[0058] The ejector seat plate 7 is connected to the lower end of the connecting block 6;

[0059] The ejector pin 8 is connected to the lower surface of the ejector pin seat plate 7 .

[0060] In the present invention, the number of ejector pins 8 is 4, which are respectively located at the left front, left rear, right front and right rear of the lower surface of the ejector pin base plate 7, so that the ejector pins 8 are evenly distributed at four positions of the module 10.

[0061] The connecting block 6 is used to connect the slider 3 and the ejector seat plate 7 , so that the ejector seat plate 7 transmits the force to the slider 3 when the force is applied. The connecting block 6 is symmetrically arranged on both sides of the pressure sensor 4 .

[0062] In a preferred embodiment, the slider 3 is connected to the pressure sensor 4 via the slider seat 2, and the slider 3 includes a slide rail vertically arranged on the side of the slider seat 2 and a slide block slidably connected to the slide rail.

[0063] Specifically, the slider 3 is used to ensure that the ejector seat plate 7 transmits only a vertically upward force to the pressure sensor 4 when the ejector 8 is subjected to a reaction force that is not completely vertically upward. The slider 3 adopts standard parts, including a sliding block and a guide rail.

[0064] In a preferred embodiment, it further includes a limit screw 14 which is disposed between the slider seat 2 and the connecting block 6 .

[0065] Specifically, the limit screw 14 is installed between the slider seat 2 and the connecting block 6 to limit the slider 3 from sliding on its guide rail during the assembly of parts, so as to prevent the slider 3 from sliding out of the guide rail and damaging the slider 3.

[0066] In a preferred embodiment, it further comprises a slider limit block 5, which is arranged at the bottom of the slide rail.

[0067] Specifically, the slider limit block 5 is used to limit the position of the slider 3 sliding downward, and also supports the ejector seat plate 7 to maintain the relative position of the ejector seat plate 7 and the pressure sensor 4. Figure 2 In the position shown, the slider limit blocks 5 are also symmetrically arranged on both sides of the pressure sensor 4.

[0068] In a preferred embodiment, it also includes a conductive force top block 13, which is arranged between the ejector seat plate 7 and the pressure sensor 4, the lower surface of the conductive force top block 13 contacts the ejector seat plate 7, and the upper surface of the conductive force top block 13 contacts the pressure sensor 4.

[0069] Specifically, the force-transmitting ejector block 13 transmits the vertical upward force exerted on the ejector seat plate 7 to the pressure sensor 4 during the process of disassembling the limiting frame 9 .

[0070] In a preferred embodiment, the lower surface of the conductive top block 13 is a spherical structure.

[0071] Specifically, the top of the force-conducting ejector block 13 is a spherical surface and is in point contact with the ejector seat plate 7, thereby ensuring that the axial force is only transmitted to the axis of the pressure sensor 4, thereby playing a protective role.

[0072] In a preferred embodiment, a limit frame 9 is further included, and the module 10 is detachably connected to the limit frame 9. The limit frame 9 is provided with a through hole corresponding to the position of the ejector pin 8. The ejector pin 8 passes through the through hole to press the module 10 downward to separate the module 10 from the limit frame 9.

[0073] Specifically, the ejector pin 8 is used to be inserted into a specific through hole of the limiting frame 9 to press the module 10 downwards, so that the module 10 is separated from the limiting frame 9, so as to facilitate the removal of the limiting frame 9 in the subsequent process.

[0074] The limiting frame 9 is used to keep the positions of the components in the module 10 stable during the reflow soldering of the module 10 product.

[0075] In a preferred embodiment, it further includes a module seat 11 disposed below the limiting frame 9 , and the module 10 is located between the limiting frame 9 and the module seat 11 .

[0076] In a preferred embodiment, the fixture base 12 is also included. The module base 11 and the limit frame 9 are both located in the fixture base 12. The module base 11 is located between the module 10 and the bottom surface of the fixture base 12, and plays a role in conveying and protecting the module 10.

[0077] Specifically, the module seat 11 plays a role in supporting and conveying the module 10 during the process of disassembling the limiting frame 9 .

[0078] Specifically, the utility model mainly includes an electric cylinder 1, a slider seat 2, a slider 3, a pressure sensor 4, a slider limit block 5, a connecting block 6, an ejector seat plate 7, an ejector 8, a limit frame 9, a module 10, a module seat 11, a fixture base 12, a conductive force ejector block 13, and a limit screw 14.

[0079] Specifically, if Figure 1 , Figure 2 As shown before and after the splitting, the limit frame 9, the module 10, the module seat 11, and the fixture base 12 overlap in the vertical direction and are in a stable static state before the splitting.

[0080] Split step 1, such as Fig.16 As shown, the ejector pin 8 is connected to the upper part, and the module 10 is connected to the lower part, and they are separated from each other;

[0081] Split step 2, such as Fig.17 As shown, the ejector pin 8 is connected to the mechanism and moves downward under the action of the electric cylinder 1, passes through the through hole of the limit frame 9 and contacts the module 10;

[0082] Split step 3, such as Fig.18 As shown, the mechanism connected to the ejector pin 8 continues to move downward under the action of the electric cylinder 1 until the module 10 and the module seat 11 are pushed down to a step below the fixture base 12. During this movement, the module 10 and the module seat 11 will not always be in a theoretical vertical downward position, but may be tilted downward due to uneven force on all sides. In this way, the ejector pin 8 will conduct the horizontal force component, i.e., the radial force, upward. Under the horizontal limitation of the slider 3, most of the radial force is borne by the slider 3, while the vertical force component, i.e., the axial force, is conducted to the conductive force ejector block 13. The top of the conductive force ejector block 13 is a spherical surface and is only in point contact with the ejector seat plate 7. This ensures that the axial force is only conducted to the axis of the pressure sensor 4, which plays a protective role. Finally, the limit frame 9 is stopped at a step above the fixture base 12, so that the limit frame 9 is separated from the module 10, achieving the splitting effect.

[0083] Next, the electric cylinder 11 retracts and waits for other mechanisms to take away the module 10 .

[0084] The utility model provides a splitting fixture pressure sensor protection device. After the module 10 product to be split is reflow soldered, the module 10 positioning fixture must be removed, the module 10 and the fixture must be separated, and the module 10 is processed separately for the next step, and the fixture needs to be reused. The prior art is to automatically split the welding fixture mechanism with an electric cylinder 1, and install a pressure sensor 4 on the head of the electric cylinder 1 to control the downward pressure of the ejector pin 8 not to exceed the set maximum value, but the pressure sensor 4 is not protected only by the axial force, resulting in the pressure sensor 4 not working in the theoretical state (only by the vertical upward axial force) during the actual splitting process. The utility model provides a splitting fixture pressure sensor protection device, which transmits the uncontrollable radial force on the pressure sensor 4 in actual work to the sliders 3 on both sides, and the pressure sensor 4 is no longer subjected to the axial force, which plays a role in protection and extending the service life. Since the pressure sensor 4 is costly and the replacement and debugging time is long, it affects the production capacity, which indirectly saves costs and improves production capacity, and has a better economic effect.

[0085] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A split fixture pressure sensor protection device, characterized in that: include, Electric cylinder (1); A pressure sensor (4) connected to the bottom of the electric cylinder (1); Slide blocks (3) for bearing radial forces, arranged on both sides of the pressure sensor (4); An ejector mechanism (15) is slidably connected to the slider (3), the ejector mechanism (15) comprising an ejector (8) located below the pressure sensor (4), the ejector (8) being driven by the electric cylinder (1) to move up and down in a vertical direction; The module (10) is arranged below the ejector mechanism (15).

2. The split fixture pressure sensor protection device according to claim 1, characterized in that: The ejector mechanism (15) comprises: A connecting block (6) slidably connected to the sliding block (3); An ejector seat plate (7) connected to the lower end of the connecting block (6); The ejector pin (8) is connected to the lower surface of the ejector pin seat plate (7).

3. The split fixture pressure sensor protection device according to claim 2, characterized in that: The slider (3) is connected to the pressure sensor (4) via a slider seat (2), and the slider (3) comprises a slide rail vertically arranged on the side of the slider seat (2) and a slide block slidably connected to the slide rail.

4. The split fixture pressure sensor protection device according to claim 3, characterized in that: It also includes a limiting screw (14) which is arranged between the slider seat (2) and the connecting block (6).

5. The split fixture pressure sensor protection device according to claim 3, characterized in that: It also comprises a slide block limiting block (5) which is arranged at the bottom of the slide rail.

6. The split fixture pressure sensor protection device according to claim 2, characterized in that: It also includes a conductive force top block (13) which is arranged between the ejector seat plate (7) and the pressure sensor (4), wherein the lower surface of the conductive force top block (13) is in contact with the ejector seat plate (7), and the upper surface of the conductive force top block (13) is in contact with the pressure sensor (4).

7. The split fixture pressure sensor protection device according to claim 6, characterized in that: The lower surface of the conductive top block (13) is a spherical structure.

8. The split fixture pressure sensor protection device according to claim 1, characterized in that: It also includes a limiting frame (9), the module (10) is detachably connected to the limiting frame (9), the limiting frame (9) is provided with a through hole corresponding to the position of the ejector pin (8), and the module (10) is separated from the limiting frame (9) by the ejector pin (8) passing through the through hole and pressing the module (10) downward.

9. The split fixture pressure sensor protection device according to claim 8, characterized in that: It also comprises a module seat (11) which is arranged below the limiting frame (9), and the module (10) is located between the limiting frame (9) and the module seat (11).

10. The split fixture pressure sensor protection device according to claim 9, characterized in that: It also comprises a fixture base (12), the module base (11) and the limit frame (9) are both located in the fixture base (12), and the module base (11) is located between the module (10) and the bottom surface of the fixture base (12).

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