A pneumatic gripper device for a flying pin machine

Abstract

The utility model discloses a kind of pneumatic clamp devices for flying needle machine in the technical field of circuit board detection equipment, comprising: clamping assembly;The clamping assembly includes lower clamping plate, upper clamping plate hinged on lower clamping plate and at least two pneumatic components arranged between lower clamping plate and upper clamping plate, and the pneumatic component is located at the two sides of upper clamping plate rotation axis respectively;The steel plate component is adopted to the upper and lower clamping plate in the application, compared with the traditional aluminum material, there is higher elastic modulus, and then the bending stiffness of structure can be improved, when satisfying specific stiffness demand, the thickness of structure is thinned, the space height of structure is reduced, the innovative structural design of multiple hinged shaft series combination rotary support etc. , the stability of air bag clamp system is improved, reliability, stiffness is improved, load capacity is enhanced. Increase the service life of clamp.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing equipment, specifically to a pneumatic clamping device for a flying needle machine. Background Technology

[0002] Traditional airbag clamping devices employ a design with rotating bearing seats on both sides supporting the opening and closing of the upper clamping plate. However, when compatible with the inspection of large-size circuit boards, the large clamping span and increased rotating support span cause the rotating support shaft and the upper clamping plate to easily deform as a whole, resulting in unstable clamping of thin plates. In particular, non-uniform deformation further reduces clamping stability and affects the accuracy of measurement data. The upper clamping plate is mostly made of sheet metal bending, resulting in insufficient overall rigidity. When the clamping opening is wide and small-area plates are frequently clamped, localized stress concentration (such as in the frequently used middle clamping opening) can cause deformation and bulging due to the elasticity of the airbag gas and the fluidity of the pneumatic system. After long-term use, the reliability of thin plate clamping decreases significantly. The double-sided rotating support design requires high strength of the support shaft, resulting in a large structural volume and a high risk of pin collision accidents. The airbag drive exhibits response lag, reducing the opening and closing efficiency of the upper and lower clamping plates and affecting the smoothness of the inspection process. Utility Model Content

[0003] The purpose of this utility model is to provide a pneumatic clamping device for a flying needle machine, which solves the problems caused by the large clamping span and increased rotation support span of existing devices.

[0004] The present invention achieves the above objectives through the following technical solution: a pneumatic clamping device for a flying needle machine, comprising: a clamping assembly;

[0005] The clamping assembly includes a lower clamping plate, an upper clamping plate hinged to the lower clamping plate, and at least two pneumatic components disposed between the lower clamping plate and the upper clamping plate, wherein the pneumatic components are respectively located on both sides of the rotation axis of the upper clamping plate.

[0006] All pneumatic components have an inflation mode and an exhaust mode. The pneumatic components on both sides simultaneously execute different modes to apply pressure to the upper clamping plate, causing the upper clamping plate to rotate and realize the closing or opening of the clamping jaws of the upper clamping assembly.

[0007] Preferably, the pneumatic components are an opening drive airbag and a clamping drive airbag, both of which are strip-shaped and are disposed on the lower clamping plate along the length extension direction of the lower clamping plate and are parallel to each other.

[0008] Preferably, the lower clamping plate is provided with two grooves, and each of the two grooves is provided with a support pad. The opening drive airbag and the clamping drive airbag are respectively provided on the two support pads, and a V-shaped groove is provided above the support pad.

[0009] The upper clamping plate is provided with a pressure plate for limiting the clamping drive airbag.

[0010] Preferably, the upper clamping plate has an opening in the middle of the contact area between the upper clamping plate and the clamping drive airbag, and the upper clamping plate has a decorative cover plate for covering the opening.

[0011] Preferably, the side of the upper clamping plate facing the lower clamping plate is provided with an embedded groove for accommodating the inflatable driving airbag.

[0012] Preferably, the tail ends of the opening drive airbag and the clamping drive airbag are fixed to the lower clamping plate by tail end tightening blocks, the head ends of the opening drive airbag and the clamping drive airbag are provided with air inlet connectors, and the head ends of the opening drive airbag and the clamping drive airbag are fixed to the lower clamping plate by inlet fixing members.

[0013] The opening drive airbag and the clamping drive airbag are provided with guides at their leading ends.

[0014] Preferably, the lower clamping plate has a groove near the end face, two fixing seats are provided in the groove, a rotating support shaft is provided between the two fixing seats, four rotating connecting sleeves are provided on the rotating support shaft, the lower clamping plate has a slot for the rotating connecting sleeves to pass through, and the upper clamping plate is provided on the four rotating connecting sleeves.

[0015] The side of the rotating support shaft facing the groove is a flat surface.

[0016] Preferably, both the lower clamping plate and the upper clamping plate are steel plates, and both the lower clamping plate and the upper clamping plate are provided with protective pads at the clamping positions.

[0017] Preferably, the pneumatic clamping device further includes a frame, and there are two sets of clamping components. The two sets of clamping components are slidably mounted on the frame, and the frame is provided with a drive component for driving the two sets of clamping components to move closer or further apart from each other.

[0018] Preferably, the drive assembly is located at one end of the clamping assembly, the other end of the clamping assembly is provided with a movable bracket, the frame is provided with a stationary bracket, and a drag chain is provided between the movable bracket and the stationary bracket. The drag chain is used to protect the air pipe connected to the air inlet connector.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. The steel plates used for the upper and lower clamping plates have a higher elastic modulus than traditional aluminum materials, which improves the bending stiffness of the structure. While meeting specific stiffness requirements, the thickness of the structure is reduced, the spatial height of the structure is decreased, the risk of impact is reduced, and the rotating support structure is hidden. While improving stiffness, the overall structural height is compressed, reducing the risk of impact during the operation of the flying needle machine. The innovative structural design of multi-hinged shaft series combination rotating support improves the stability and reliability of the airbag clamp system, increases stiffness, enhances load-bearing capacity, and increases the service life of the clamp.

[0021] 2. The design of the V-groove and pressure plate on the support pad improves the response speed and driving efficiency of the pneumatic system, thereby improving the efficiency of loading and unloading.

[0022] 3. The upper clamping plate retracts backward when it opens, which facilitates vertical loading and unloading. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the pneumatic clamping device of this utility model;

[0024] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the connection structure between the lower clamping plate and the upper clamping plate of this utility model;

[0026] Figure 4 This utility model Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0027] Figure 5 This is a schematic diagram of the connection structure between the lower clamping plate and the rotating support shaft of this utility model;

[0028] Figure 6 This utility model Figure 5 Enlarged schematic diagram of the structure at point B;

[0029] Figure 7 This is a schematic diagram of the clamping assembly of this utility model in its open state;

[0030] Figure 8 This is a schematic diagram of the clamping state of the clamping component of this utility model.

[0031] In the diagram: 1. Frame; 2. Clamping assembly; 201. Lower clamping plate; 202. Upper clamping plate; 203. Opening; 204. Decorative cover plate; 205. Deploying drive airbag; 206. Clamping drive airbag; 207. Tail end tightening block; 208. Air inlet connector; 209. Inlet fixing component; 210. Guide component; 211. Fixing base; 212. Rotary support shaft; 213. Rotary connecting sleeve; 214. Groove; 215. Trench; 216. Support pad; 217. Embedded groove; 218. Pressure plate; 219. Protective pad; 3. Drive assembly; 4. Moving bracket; 5. Static bracket; 6. Cable chain. Detailed Implementation

[0032] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0033] Example 1

[0034] Please see Figure 2 , Figure 3 , Figure 7 and Figure 8 A pneumatic clamping device for a flying needle machine includes: a clamping assembly 2; the clamping assembly 2 includes a lower clamping plate 201, an upper clamping plate 202 hinged to the lower clamping plate 201, and at least two pneumatic components disposed between the lower clamping plate 201 and the upper clamping plate 202, the pneumatic components being located on both sides of the rotation axis of the upper clamping plate 202 (with the clamping opening of the clamping assembly 2 as the front side and the side away from the clamping opening as the rear side, the pneumatic components are located on the front and rear sides of the hinge area between the upper clamping plate 202 and the lower clamping plate 201 respectively); each pneumatic component has an inflation mode and an exhaust mode, and the inlet of the pneumatic component is connected to a two-position five-way solenoid valve.

[0035] It should be noted that when the clamping assembly 2 clamps, air is injected into the rear pneumatic component while the air inside the front pneumatic component is discharged. This causes the rear pneumatic component to exert an upward force on the rear end of the upper clamping plate 202, causing the front end of the upper clamping plate 202 to rotate and move closer to the lower clamping plate 201, thus closing the clamping jaws of the clamping assembly 2. When the clamping assembly 2 opens, air is injected into the front pneumatic component while the air inside the rear pneumatic component is discharged. This causes the front pneumatic component to exert an upward force on the front end of the upper clamping plate 202, causing the front end of the upper clamping plate 202 to rotate away from the lower clamping plate 201, thus opening the clamping jaws of the clamping assembly 2.

[0036] It should also be noted that the pneumatic component can be an air bag, or it can be a sleeve and a sliding rod inserted inside the sleeve. By injecting air into the sleeve, the sliding rod can move upward. When the air inside the sleeve is discharged, the sliding rod loses the air pressure and moves downward.

[0037] Example 2

[0038] The following is a detailed explanation using a pneumatic component as an airbag as an example:

[0039] Please see Figure 3 , Figure 7 and Figure 8 The two pneumatic components are an opening drive airbag 205 and a clamping drive airbag 206. Both the opening drive airbag 205 and the clamping drive airbag 206 are strip-shaped and parallel to each other. Both the opening drive airbag 205 and the clamping drive airbag 206 are located on the lower clamping plate 201 along the length extension direction of the lower clamping plate 201 and are in contact with the side wall of the upper clamping plate 202 facing the lower clamping plate 201.

[0040] Please see Figure 3 and Figure 4 The tail ends of the deploying drive airbag 205 and the clamping drive airbag 206 are fixed to the lower clamping plate 201 by the tail end tightening block 207. The inlet of the deploying drive airbag 205 and the clamping drive airbag 206 is equipped with an internal thread interface, and an air inlet connector 208 is provided at the internal thread interface. The inlet of the deploying drive airbag 205 and the clamping drive airbag 206 is fixed to the lower clamping plate 201 by an inlet fixing member 209. The inlet fixing member 209 provides a sealing and reinforcement treatment at the connection between the airbag and the air inlet connector 208. The inlet of the deploying drive airbag 205 and the clamping drive airbag 206 is provided with a guide member 210 to guide the position of the airbag inlet, so that the inlet of the airbag is stuck at the position of the support pad 216 and will not move due to the deformation of the airbag.

[0041] It should be noted that when the pressure port of the solenoid valve is connected to the air inlet pressure port of the clamping drive airbag 206, the air inlet of the opening drive airbag 205 is connected to the exhaust port of the solenoid valve for free exhaust. In this way, the clamping drive airbag 206 expands and pushes the upper clamping plate 202 to rotate. At the same time, the gas in the opening drive airbag 205 is compressed and discharged into the air, thereby closing the clamping jaws of the clamping assembly 2. When the pressure port of the solenoid valve is connected to the air inlet pressure port of the opening drive airbag 205, the air inlet of the clamping drive airbag 206 is connected to the exhaust port of the solenoid valve for free exhaust. In this way, the opening drive airbag 205 expands and pushes the upper clamping plate 202 to rotate. At the same time, the gas in the clamping drive airbag 206 is compressed and discharged into the air, thereby opening the clamping jaws of the clamping assembly 2.

[0042] In this embodiment, as a further optimization, please refer to... Figure 7 and Figure 8Two grooves 215 are formed on the side wall of the lower clamping plate 201 facing the upper clamping plate 202. Support pads 216 (plastic structural parts) are adhered to both grooves 215. The inflating drive airbag 205 and the clamping drive airbag 206 are respectively mounted on the two support pads 216. A V-shaped groove is formed above the support pads 216 for protecting the airbags (the airbags refer to the inflating drive airbag 205 and the clamping drive airbag 206). Because the airbags experience creeping friction during use, the protection provided by the plastic parts improves the durability of the airbags. Simultaneously, the V-shaped groove design stabilizes the force application point of the airbags when they inflate, preventing them from deforming and shifting arbitrarily, thus improving the pneumatic response speed and overall performance. The upper clamping plate 202 improves operational efficiency and avoids sluggishness in the pneumatic system. Two pressure plates 218 are provided on the side wall of the upper clamping plate 202 facing the lower clamping plate 201. These pressure plates 218 are located to the right of the clamping drive airbag 206 and are used to restrict its movement. When the clamping drive airbag 206 expands, the upper and lower clamping plates rotate back and forth around the rotating support shaft 212, resulting in a certain angle between them. The pressure plates 218 limit the deformation range of the clamping drive airbag 206 during expansion, preventing it from protruding outwards due to the inclined surface of the upper clamping plate 202 and the expansion force. This avoids affecting the operational efficiency of the upper clamping plate 202 and causing sluggishness in the pneumatic system.

[0043] In this embodiment, as a further optimization, please refer to... Figure 2 and Figure 3 An opening 203 is provided in the middle of the contact area between the upper clamping plate 202 and the clamping drive airbag 206. A decorative cover plate 204 (black transparent material) is provided above the upper clamping plate 202 to cover the opening 203. Generally, small PCB boards are clamped in the middle. Through the opening 203, the expansion of the clamping drive airbag 206 can only exert force on both ends of the upper clamping plate 202, avoiding direct force in the middle that would cause the clamping drive airbag 206 to expand to both ends, thus avoiding deformation of the clamping ends. At the same time, the opening 203 in the middle buffers the air pressure fluctuations, reducing the impact of pressure fluctuations on the deformation of the clamping system.

[0044] In this embodiment, as a further optimization, please refer to... Figure 7 and Figure 8An embedded groove 217 is provided on the side of the upper clamping plate 202 facing the lower clamping plate 201. The embedded groove 217 is used to accommodate the opening drive airbag 205. When the clamping assembly 2 clamps and the opening drive airbag 205 deflates and contracts, the embedded groove 217 accommodates the opening drive airbag 205, which is used to hide the volume of the opening drive airbag 205 and ensure that the upper clamping plate 202 and the lower clamping plate 201 are firmly attached together. This ensures that plates of different thicknesses can be clamped, improving the adaptability of the clamping range.

[0045] In this embodiment, as a further optimization, please refer to... Figure 2 , Figure 3 , Figure 5 and Figure 6 The lower clamping plate 201 has a groove near its end face (i.e., the back of the lower clamping plate 201 has a groove). Two fixing seats 211 are located within the groove, and a rotating support shaft 212 is positioned between the two fixing seats 211. Four rotating connecting sleeves 213 are mounted on the rotating support shaft 212, located at both ends and the middle of the rotating support shaft 212. Four slots 214 are formed on the lower clamping plate 201, allowing the rotating connecting sleeves 213 to pass through. The upper clamping plate 202 is connected to the four rotating connecting sleeves 213 by screws. The side of the rotating support shaft 212 facing the groove is flat. The rotating connection structure of the upper and lower clamping plates uses a multi-set series hinge shaft connection method. Compared to the traditional form with rotating support seats at both ends, the middle rotating shaft deforms due to its large span. This structural design addresses this by modifying the upper clamping plate 202... 02 is connected to four rotating connecting sleeves 213 (the four rotating connecting sleeves 213 are located at the left, middle, middle and right ends of the rotating support shaft 212), connecting the upper clamping plate 202 and the rotating support shaft 212 from beginning to end into a rotating whole, preventing deformation caused by local stress concentration, reducing the probability of deformation in the middle of the upper clamping plate 202 due to stress concentration, and improving the durability of the fixture; the fixing method of the rotating support shaft 212 is also tightly fitted with the lower clamping plate 201, unlike the traditional method of fixing through left and right rotating support seats with the middle suspended, which has low bending strength of the shaft, and the fixture will deform with the upper clamping plate 202 after a short period of use, affecting the use of the fixture and causing thin plates to be unable to be clamped. The tight fit between the rotating support shaft 212 and the lower clamping plate 201 is equivalent to the mutual coupling of the two stiffnesses, which improves the stiffness of each other and improves the load resistance.

[0046] It should be noted that since the upper clamping plate 202 is connected and fixed to the mounting surface of the rotating connecting sleeve 213, and moves together with the rotating supporting shaft 212 through the rotating connecting sleeve 213, this structure is equivalent to increasing the rotation radius of the upper clamping plate 202. When the upper clamping plate 202 opens, the upper clamping plate 202 has a slight backward retraction action, exposing the lower clamping plate 201, which facilitates the vertical loading and unloading of materials by the clamping device.

[0047] In this embodiment, as a further optimization, please refer to... Figure 2 , Figure 3 , Figure 7 and Figure 8 Both the lower clamping plate 201 and the upper clamping plate 202 are made of steel plates, which have a higher modulus of elasticity than traditional aluminum materials. This improves the bending stiffness of the structure and allows for a reduction in the thickness and height of the structure when specific stiffness requirements are met, thus reducing the risk of impact pins. Both the lower clamping plate 201 and the upper clamping plate 202 have protective pads 219 at their clamping points. These protective pads are made of elastic rubber and provide soft protection when clamping the PCB board to prevent damage to the PCB board caused by pressure fluctuations.

[0048] Example 3

[0049] As a further optimization of Example 2, please refer to Figure 1 The pneumatic clamping device also includes a frame 1, and two sets of clamping components 2, which are slidably mounted on the frame 1. The frame 1 is equipped with a drive component 3, which includes a lead screw, a servo motor, two screw nuts sleeved on the outer wall of the lead screw, and mounting seats nested on the screw nuts. Two bearing seats are mounted on the frame 1, and the lead screw is rotatably mounted between the two bearing seats. The servo motor is mounted on the frame 1, and the output shaft of the servo motor is connected to the lead screw. The two mounting seats are respectively connected to the slider mounting plates at one end of the two lower clamping plates 201. When the servo motor works, it drives the lead screw to rotate, causing the two screw nuts, along with the two mounting seats and the two lower clamping plates 201, to move closer or further apart, changing the distance between the two clamping components 2, so that the electric clamping device can adapt to the clamping of PCB boards of different widths.

[0050] In this embodiment, as a further optimization, please refer to... Figure 1 The sliding block mounting plates at the other end of the two lower clamping plates 201 are equipped with moving brackets 4, and the frame 1 is equipped with a stationary bracket 5. A drag chain 6 is provided between the moving bracket 4 and the stationary bracket 5. The drag chain 6 is a protective air pipe for supplying air to the airbag. Driven by the variable pitch drive system, it moves with the clamping system to adapt to the clamping of PCB boards of different sizes and widths.

[0051] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A pneumatic gripper device for a flying probe machine, characterized in that, include: Clamping component (2); The clamping assembly (2) includes a lower clamping plate (201), an upper clamping plate (202) hinged to the lower clamping plate (201), and at least two pneumatic components disposed between the lower clamping plate (201) and the upper clamping plate (202), wherein the pneumatic components are respectively located on both sides of the rotation axis of the upper clamping plate (202); All pneumatic components have an inflation mode and an exhaust mode. The pneumatic components on both sides simultaneously execute different modes to apply pressure to the upper clamping plate (202), causing the upper clamping plate (202) to rotate, thereby achieving the closing or opening of the clamping jaws of the upper clamping assembly (2).

2. An aerodynamic clamp apparatus for a flying probe machine as claimed in claim 1, wherein, The pneumatic components are an opening drive airbag (205) and a clamping drive airbag (206). Both the opening drive airbag (205) and the clamping drive airbag (206) are strip-shaped. Both the opening drive airbag (205) and the clamping drive airbag (206) are arranged on the lower clamping plate (201) along the length extension direction of the lower clamping plate (201) and are parallel to each other.

3. An aerodynamic clamp apparatus for a flying probe machine as claimed in claim 2, wherein, The lower clamping plate (201) is provided with two grooves (215), and each of the two grooves (215) is provided with a support pad (216). The opening drive airbag (205) and the clamping drive airbag (206) are respectively provided on the two support pads (216). A V-shaped groove is provided above the support pad (216). The upper clamping plate (202) is provided with a pressure plate (218) for restricting the clamping drive airbag (206).

4. The device of claim 2, wherein, An opening (203) is provided in the middle of the contact area between the upper clamping plate (202) and the clamping drive airbag (206), and a decorative cover plate (204) is provided on the upper clamping plate (202) to cover the opening (203).

5. The device of claim 2, wherein, The upper clamping plate (202) has an embedded groove (217) on the side facing the lower clamping plate (201) for accommodating the inflatable driving airbag (205).

6. An aerodynamic clamp apparatus for a flying probe machine as claimed in claim 3, wherein, The tail ends of the opening drive airbag (205) and the clamping drive airbag (206) are fixed to the lower clamping plate (201) by the tail end tightening block (207). The front ends of the opening drive airbag (205) and the clamping drive airbag (206) are provided with air inlet connectors (208). The front ends of the opening drive airbag (205) and the clamping drive airbag (206) are fixed to the lower clamping plate (201) by the inlet fixing member (209). The opening drive airbag (205) and the clamping drive airbag (206) are provided with guides (210) at their heads.

7. The device of claim 1, wherein, The lower clamping plate (201) has a groove near its end face, and two fixing seats (211) are provided in the groove. A rotating support shaft (212) is provided between the two fixing seats (211). Four rotating connecting sleeves (213) are provided on the rotating support shaft (212). The lower clamping plate (201) has a slot (214) for the rotating connecting sleeves (213) to pass through. The upper clamping plate (202) is provided on the four rotating connecting sleeves (213). The side of the rotating support shaft (212) facing the groove is a flat surface.

8. The device of claim 1, wherein, Both the lower clamping plate (201) and the upper clamping plate (202) are steel plates, and both the lower clamping plate (201) and the upper clamping plate (202) are provided with protective pads (219) at the clamping positions.

9. An aerodynamic clamp apparatus for a flying probe machine as defined in claim 6, wherein, The pneumatic clamping device also includes a frame (1), and there are two sets of clamping components (2). The two sets of clamping components (2) are slidably mounted on the frame (1). The frame (1) is provided with a drive component (3) for driving the two sets of clamping components (2) to move closer or further apart from each other.

10. An aerodynamic clamp apparatus for a flying probe machine as claimed in claim 9, wherein, The drive assembly (3) is located at one end of the clamping assembly (2), and a moving bracket (4) is provided on the other end of the clamping assembly (2). A stationary bracket (5) is provided on the frame (1). A drag chain (6) is provided between the moving bracket (4) and the stationary bracket (5). The drag chain (6) is used to protect the air pipe connected to the air inlet connector (208).

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