A clamping fixture suction negative pressure box body and its deputy clamping fixture

Abstract

The present invention discloses a clamping fixture suction negative pressure box body and its deputy clamping fixture. A negative pressure cavity is arranged inside the box body main body. The lower surface of the box body main body is a plane and is provided with a plurality of adsorption air holes, and all the adsorption air holes are communicated with the negative pressure cavity. Then, an air extraction pipe connection port is arranged and communicated with the negative pressure cavity. The air extraction pipe connection port is connected to an air extraction pipe, and the air in the negative pressure cavity is sucked to form negative pressure. Since all the adsorption air holes are communicated with the negative pressure cavity, the negative pressure suction generated by each adsorption air hole is more balanced. Each adsorption air hole is uniformly docked with an external pipe through the air extraction connection port, making the pipeline wiring more concise; the negative pressure cavity can be divided into a front cavity and a rear cavity. At the same time, the deputy clamping fixture can also be adjusted in position on the fixing frame through a sliding locking device. The combination of the two can be more applicable to circuit boards of different lengths and widths, greatly improving the applicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit board fixture design, and particularly relates to a fixture suction cup negative pressure box body and its deputy fixture. Background Art

[0002] In the field of circuit board detection, a deputy fixture is a fixture suitable for grasping a circuit board. For example, the first auxiliary fixture 7 in patent CN107167690A is a deputy fixture, which is used to cooperate with a manipulator for board flipping. The existing deputy fixtures have the following disadvantages:

[0003] 1. The existing deputy fixture is provided with a suction and exhaust device below, and there are many suction cups on the suction and exhaust device. A suction pipe for sucking air is provided corresponding to each suction cup. The suction pipe sucks gas to create negative pressure, thereby sucking the circuit board. However, in this way, since each suction cup is independently connected to the suction pipe, not only is the structure complex and there are many pipes, but also the suction force of each suction cup is prone to unevenness.

[0004] 2. When the existing deputy fixture is applied to circuit boards of different sizes, its applicability is insufficient and needs to be further improved so that it has stronger applicability to circuit boards of different sizes and specifications. Summary of the Invention

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a fixture suction cup negative pressure box body with a simple structure and more balanced suction force.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] A fixture suction cup negative pressure box body includes a box main body. A negative pressure chamber is provided inside the box main body. The lower surface of the box main body is a plane. A plurality of adsorption air holes communicating with the negative pressure chamber for adsorbing products are provided on the lower surface of the box main body; the box main body is provided with an air pipe connection port for connecting to an external vacuum pumping device; the air pipe connection port communicates with the negative pressure chamber.

[0008] In the above technical solution of a fixture suction cup negative pressure box body, a negative pressure chamber is arranged inside the box main body. The lower surface of the box main body is a plane and is provided with a plurality of adsorption air holes, and the adsorption air holes all communicate with the negative pressure chamber. Then, an air pipe connection port is arranged to communicate with the negative pressure chamber. The air pipe connection port is connected to an air pipe, and the gas in the negative pressure chamber is sucked to form negative pressure. Since all the adsorption air holes communicate with the negative pressure chamber, the negative pressure suction force generated by each adsorption air hole is more balanced. All the adsorption air holes are uniformly docked with an external pipe through the air pipe connection port, making the pipeline wiring more concise.

[0009] In some embodiments, the negative pressure chamber includes a front-end chamber at the front end and a rear-end chamber at the rear end. A connection control device for controlling the connection or disconnection between the front-end chamber and the rear-end chamber is provided between the front-end chamber and the rear-end chamber; the front-end chamber and the rear-end chamber are both provided with a plurality of suction holes penetrating through the lower surface of the box body for adsorbing products; the air extraction pipe connection port communicates with the front-end chamber or the rear-end chamber. By setting the front-end chamber and the rear-end chamber, it can be used corresponding to circuit boards of different sizes, improving practicability.

[0010] In some embodiments, the connection control device includes a cylinder mounting plate, a partition baffle, a movable baffle, and a small telescopic cylinder; the partition baffle is arranged between the front-end chamber and the rear-end chamber to seal and isolate the two chambers; a first connection opening communicating the front-end chamber and the rear-end chamber is provided on the partition baffle; the cylinder mounting plate is fixed to the box body and is provided with a second connection opening; the small telescopic cylinder is fixed to the cylinder mounting plate; the telescopic rod of the small telescopic cylinder passes through the first connection opening of the partition baffle and is connected with the movable baffle; the movable baffle is adapted to the first connection opening to block and seal the first connection opening under the control of the telescopic movement of the telescopic rod or to open the first connection opening under the control of the telescopic movement of the telescopic rod. An implementation manner of the connection control device, other connection control devices can also be set for automatic or manual control, which should all fall within the protection scope of this application.

[0011] In some embodiments, guide rails are provided on the partition baffle, and the movable baffle is slidably connected and matched with the guide rails. The small telescopic cylinder controls the movable baffle to slide on the guide rails to open or block the first connection opening. By setting the guide rails, the structure is more stable, the service life is longer, and the sealing performance is better.

[0012] In some embodiments, a cylinder connection head for connecting the small telescopic cylinder to an external pneumatic control device is provided on the wall of the box body. The outer wall of the cylinder connection head is hermetically installed on the wall of the box body. One end of the cylinder connection head located inside the negative pressure chamber is used to connect with the small telescopic cylinder, and the end of the cylinder connection head located outside the negative pressure chamber is used to connect with the external pneumatic control device. Through the cylinder connection head for connection, it is convenient to maintain the airtightness inside the chamber and should not be damaged by connecting pipes.

[0013] In some embodiments, a layer of sponge suction cups is provided on the lower surface of the box body, and the sponge suction cups are provided with through holes corresponding to the suction holes. It can prevent collision with the circuit board and damage the circuit board, playing a buffering role.

[0014] The second object of the present invention is to provide an assistant fixture. By applying the above-mentioned suction cup negative pressure box body, not only the structure is simpler, but also the suction force is more evenly distributed. The distance between the fixture suction cup negative pressure box bodies can be adjusted, so as to be applicable to circuit boards of different specifications and sizes, improving the applicability of the assistant fixture.

[0015] An auxiliary fixture includes a fixed frame plate, a slide rail, a sliding locking device, and at least two of the above-mentioned fixture suction cup negative pressure boxes; the slide rail is arranged on the lower surface of the fixed frame plate, and at least two of the fixture suction cup negative pressure boxes are respectively slidably connected to the slide rail through the sliding locking device; it is possible to lock the position of the fixture suction cup negative pressure box on the slide rail through the sliding locking device after adjusting its position on the slide rail.

[0016] In some embodiments, the sliding locking device includes a slider, a slider mounting plate, a locking frame, a locking pressure block, a rotating handle, and a locking threaded shaft; the fixture suction cup negative pressure chamber is fixedly connected to the lower end of the slider mounting plate; the slider is slidably connected to the slide rail; the lower end of the slider is fixedly connected to the upper end of the slider mounting plate; one end of the locking frame is fixed on the slider mounting plate, and the other end of the locking frame is provided with a threaded through hole at the side of the fixed frame plate, and the locking threaded shaft passes through the threaded through hole; a locking pressure block is provided at one end of the locking threaded shaft close to the fixed frame plate, and a rotating handle is provided at the other end of the locking threaded shaft far from the fixed frame plate; by rotating the rotating handle, the pressure block is abutted against the side of the fixed frame plate, so as to lock the position of the fixture suction cup negative pressure chamber on the slide rail, which is possible.

[0017] In some embodiments, a diffuse reflection sensor for sensing whether there is a board below is provided on the outer side surface of the box body.

[0018] The beneficial effects of the present invention are as follows: The present invention discloses a fixture suction cup negative pressure box and its auxiliary fixture. A negative pressure chamber is arranged in the box body. The lower surface of the box body is a plane and is provided with a plurality of adsorption air holes, and all the adsorption air holes are communicated with the negative pressure chamber. Then, an air extraction pipe connection port is provided and communicated with the negative pressure chamber, and the air extraction pipe connection port is connected to an air extraction pipe to suck the gas in the negative pressure chamber to form a negative pressure. Because all the adsorption air holes are communicated with the negative pressure chamber, the negative pressure suction generated by each adsorption air hole is more balanced. All the adsorption air holes are uniformly docked with an external pipe through the air extraction connection port, making the pipeline wiring more concise; the negative pressure chamber can be divided into a front chamber and a rear chamber. At the same time, the auxiliary fixture can also make the position of the fixture suction cup negative pressure box adjustable on the fixed frame through the sliding locking device. The combination of the two can be more applicable to circuit boards of different lengths and widths, greatly improving the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 It is a schematic upper axonometric three-dimensional structure diagram of an auxiliary fixture described in an embodiment of the present invention;

[0021] Figure 2 It is a schematic lower axonometric three-dimensional structure diagram of an auxiliary fixture described in an embodiment of the present invention;

[0022] Figure 3 is a schematic cross-sectional structure diagram of a sliding locking device of an assistant fixture described in an embodiment of the present invention;

[0023] Figure 4 is a schematic top view structure diagram of the top plate of the box body of a clamping fixture suction negative pressure box body in a perspective view described in an embodiment of the present invention;

[0024] Figure 5 is a schematic structure diagram of an internal communication control device of a clamping fixture suction negative pressure box body described in an embodiment of the present invention. Detailed implementation manners

[0025] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0026] In the description of the present application, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] As Figures 1-5 A clamping fixture suction negative pressure box body 10 as shown includes a box body 1. A negative pressure chamber 2 is provided inside the box body 1. The lower surface of the box body 1 is a plane. A plurality of suction holes 11 for adsorbing products and communicating with the negative pressure chamber are provided on the lower surface of the box body 1; the box body 1 is provided with an air suction pipe connection port 3 for connecting to an external vacuum pumping device; the air suction pipe connection port 3 is communicated with the negative pressure chamber 2.

[0029] As Figure 1Schematic structural diagram of the deputy fixture shown; in this embodiment, the deputy fixture includes two fixture suction cup negative pressure boxes 10, Figure 1 The left fixture suction cup negative pressure box 10 in the figure is a complete structure and is not connected to pipelines such as pneumatic pipelines; for the convenience of seeing the internal negative pressure cavity of the right fixture suction cup negative pressure box 10, the upper top plate of the fixture suction cup negative pressure box 10 is shown in a perspective manner.

[0030] For a fixture suction cup negative pressure box 10 in the above technical solution, a negative pressure cavity 2 is arranged in the box main body 1. The lower surface of the box main body 1 is a plane and is provided with a plurality of adsorption air holes 11, and all the adsorption air holes 11 are communicated with the negative pressure cavity 2. Then, an air extraction pipe connection port 3 is arranged and communicated with the negative pressure cavity 2 (as Figure 1 shown, the position of the air extraction pipe connection port 3 can be arranged on the top plate of the box main body 1; in other embodiments, it can also be arranged on the side plate of the box main body). The air extraction pipe connection port 3 is connected to an external air extraction pipe (the air extraction pipe of an external vacuum machine, not shown in the figure. It can be branched into two sub-pipes by a tee and respectively connected to Figure 1 the two negative pressure cavities in the figure to achieve the effect of unified control; each negative pressure cavity can also be controlled separately, but the same intelligent system issues a unified suction instruction to keep the negative pressure of multiple negative pressure cavities 2 balanced). The gas in the negative pressure cavity 2 is sucked to form a negative pressure. Since all the adsorption air holes 11 are communicated with the negative pressure cavity 2, the negative pressure suction generated by each adsorption air hole 11 is more balanced. All the adsorption air holes 11 are uniformly docked with the external pipeline through the air extraction connection port 3, making the pipeline wiring more concise.

[0031] As Figures 3-5 shown, in some embodiments, the negative pressure cavity 2 includes a front end chamber 21 at the front end and a rear end chamber 22 at the rear end. A communication control device 4 for controlling the communication or non-communication between the front end chamber 21 and the rear end chamber 22 is arranged between the front end chamber 21 and the rear end chamber 22; a plurality of adsorption air holes 11 for adsorbing products and penetrating the lower surface of the box main body are arranged in both the front end chamber 21 and the rear end chamber 22; the air extraction pipe connection port 3 is communicated with the front end chamber 21 or the rear end chamber 22. By arranging the front end chamber 21 and the rear end chamber 22, when the communication control device 4 is closed and the two chambers are not communicated, only the front end chamber 21 or the rear end chamber 22 connected to the air extraction pipe connection port 3 has suction force, which can be used for circuit boards of different sizes, thereby improving the applicability.

[0032] In some embodiments, the connection control device 4 includes a cylinder mounting plate 41, a partition baffle 42, a movable baffle 43, and a small telescopic cylinder 44; the partition baffle 42 is disposed between the front chamber 21 and the rear chamber 22 to seal and isolate the two chambers; the partition baffle 42 is provided with a first communication opening 421 for communicating the front chamber 21 and the rear chamber 22; the cylinder mounting plate 41 is fixed to the box body 1 and is provided with a second communication opening 411 (without blocking the first communication opening 421, so that the first communication opening 421 can communicate the front chamber 21 and the rear chamber 22); the small telescopic cylinder 44 is fixed to the cylinder mounting plate 41; the telescopic rod of the small telescopic cylinder 44 passes through the first communication opening 421 of the partition baffle 42 and is connected with a movable baffle 45; the movable baffle 45 is adapted to the first communication opening 421 to block and seal the first communication opening 421 under the control of the telescopic rod or to open the first communication opening 421 under the control of the telescopic rod. For an implementation manner of the connection control device, other connection control devices may also be provided for automatic or manual control, which should all fall within the protection scope of the present application.

[0033] In some embodiments, the partition baffle 42 is provided with a guide rail 422, the movable baffle 43 is slidably connected and cooperated with the guide rail 422, and the small telescopic cylinder 44 controls the movable baffle 43 to slide on the guide rail 422 to open or block the first communication opening 421. The setting of the guide rail 422 makes the structure more stable, has a longer service life, and better sealing performance.

[0034] In some embodiments, a cylinder connector 5 for connecting the small telescopic cylinder to an external pneumatic control device is provided on the wall of the box body 1. The outer wall of the cylinder connector 5 is hermetically installed on the wall of the box body 1. One end of the cylinder connector 5 located inside the negative pressure chamber 2 is used to connect with the small telescopic cylinder 44, and one end of the cylinder connector 5 located outside the negative pressure chamber 2 is used to connect with the external pneumatic control device. Through the cylinder connector 5 for connection, it is convenient to maintain the airtightness inside the negative pressure chamber.

[0035] In some embodiments, a layer of sponge suction cups 6 is provided on the lower surface of the box body 1, and the sponge suction cups 6 are provided with through holes corresponding to the adsorption air holes 11. It can prevent collision with the circuit board and damage the circuit board, playing a buffering role.

[0036] The second object of the present invention is to provide an assistant fixture 100. Compared with the existing assistant fixtures, the assistant fixture 100 of the present application applies the above-mentioned fixture suction cup negative pressure chamber 10, which is not only simpler in structure, but also more uniform in suction force. The distance between the fixture suction cup negative pressure boxes 10 can be adjusted, so as to be applicable to circuit boards of different specifications and sizes, and improve the applicability of the assistant fixture.

[0037] Such as Figure 1 AndFigure 2 As shown, a deputy fixture 100 includes a fixed frame plate 9, a slide rail 7, a sliding locking device 8, and at least two of the above-mentioned fixture suction cup negative pressure boxes 10; the slide rail 7 is arranged on the lower surface of the fixed frame plate 9, and at least two of the fixture suction cup negative pressure boxes 10 are respectively slidably connected to the slide rail 7 through the sliding locking device 8; it is possible to lock the position of the fixture suction cup negative pressure box 10 on the slide rail 7 after adjusting its position on the slide rail 7 through the sliding locking device 8.

[0038] In some embodiments, the sliding locking device 8 includes a slider 81, a slider mounting plate 82, a locking frame 83, a locking pressure block 84, a rotating handle 85, and a locking threaded shaft 86; the fixture suction cup negative pressure chamber 10 is fixedly connected to the lower end of the slider mounting plate 82; the slider 81 is slidably connected to the slide rail 7; the lower end of the slider 81 is fixedly connected to the upper end of the slider mounting plate 82; one end of the locking frame 83 is fixed on the slider mounting plate 82, and the other end of the locking frame 83 is provided with a threaded through hole at the side of the fixed frame plate 9, and the locking threaded shaft 86 passes through the threaded through hole; a locking pressure block 84 is provided at one end of the locking threaded shaft 86 close to the fixed frame plate 9, and a rotating handle 85 is provided at the other end of the locking threaded shaft 86 far from the fixed frame plate 9; by rotating the rotating handle 85, the locking pressure block 84 is abutted against the side of the fixed frame plate 9, so as to lock the position of the fixture suction cup negative pressure chamber 10 on the slide rail 7, which is possible.

[0039] The fixture suction cup negative pressure box 10 of the present application has a simple structure and balanced suction force. It can not only be used as a deputy fixture for sucking circuit boards, but also can be applied to other fixtures that need to suck circuit boards or products of the same type.

[0040] In some embodiments, a diffuse reflection sensor 12 for sensing whether there is a board below is provided on the outer side surface of the box body 10.

[0041] For the deputy fixture 100 of the present application, connecting the fixed frame plate 9 to an external moving module (not shown in the figure, and the external moving module can be set with reference to Patent CN107167690A) can complete the movement control; it can not only be connected to a conventional moving module to complete the movement, but also be connected to a manipulator to complete the movement; it can also be applied to other automated process that need to suck circuit boards or products of the same type, and will not be repeated one by one.

[0042] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A clamping fixture suction negative pressure box body, characterized in that: It includes a box body with a negative pressure chamber inside. The lower surface of the box body is a flat surface, and several suction holes for adsorbing products and communicating with the negative pressure chamber are provided on the lower surface of the box body; the box body is provided with an air suction pipe connection port for connecting to an external vacuum device; the air suction pipe connection port communicates with the negative pressure chamber. The negative pressure chamber includes a front chamber at the front end and a rear chamber at the rear end. A connection control device for controlling the connection or disconnection between the front chamber and the rear chamber is provided between the front chamber and the rear chamber; several suction holes for adsorbing products and penetrating the lower surface of the box body are provided in both the front chamber and the rear chamber; the air suction pipe connection port communicates with either the front chamber or the rear chamber. The connection control device includes a cylinder mounting plate, an isolation baffle, a movable baffle, and a small telescopic cylinder; the isolation baffle is arranged between the front chamber and the rear chamber to seal and isolate the two chambers; a first communication opening for communicating the front chamber and the rear chamber is provided on the isolation baffle; the cylinder mounting plate is fixed to the box body and is provided with a second communication opening; the small telescopic cylinder is fixed to the cylinder mounting plate; the telescopic rod of the small telescopic cylinder passes through the first communication opening of the isolation baffle and is connected with a movable baffle; the movable baffle is adapted to the first communication opening to block and seal the first communication opening under the control of the telescopic movement of the telescopic rod or to open the first communication opening under the control of the telescopic movement of the telescopic rod.

2. The negative pressure box body of a fixture suction cup according to claim 1, characterized in that: A guide rail is provided on the isolation baffle, and the movable baffle is slidably connected and matched with the guide rail. The small telescopic cylinder controls the movable baffle to slide on the guide rail to open or block the first communication opening.

3. A negative pressure box of a fixture suction cup according to claim 1, characterized in that: An air cylinder connection head for connecting the small telescopic cylinder to an external pneumatic control device is provided on the wall of the box body. The outer side wall of the air cylinder connection head is hermetically installed on the wall of the box body. One end of the air cylinder connection head located inside the negative pressure chamber is used to connect with the small telescopic cylinder, and the end of the air cylinder connection head located outside the negative pressure chamber is used to connect with the external pneumatic control device.

4. A negative pressure box of a fixture suction cup according to claim 1, characterized in that: A layer of sponge suction cups is provided on the lower surface of the box body, and the sponge suction cups are provided with through holes corresponding to the suction holes.

5. A deputy clamp, characterized in that: It includes a fixed frame plate, a slide rail, a sliding locking device, and at least two jig suction cup negative pressure boxes as described in any one of claims 1-4; the slide rail is arranged on the lower surface of the fixed frame plate, and at least two of the jig suction cup negative pressure boxes are respectively slidably connected to the slide rail through the sliding locking device; it is possible to lock the position of the jig suction cup negative pressure box on the slide rail after adjusting its position through the sliding locking device.

6. The deputy clamp according to claim 5, wherein: The sliding locking device includes a slider, a slider mounting plate, a locking frame, a locking pressure block, a rotating handle, and a locking threaded shaft; the clamping suction cup negative pressure box body is fixedly connected to the lower end of the slider mounting plate; the slider is slidably connected to the slide rail; the lower end of the slider is fixedly connected to the upper end of the slider mounting plate; one end of the locking frame is fixed on the slider mounting plate, and the other end of the locking frame is provided with a threaded through hole at the side of the fixed frame plate, and the locking threaded shaft passes through the threaded through hole; a locking pressure block is provided at one end of the locking threaded shaft close to the fixed frame plate, and a rotating handle is provided at the other end of the locking threaded shaft away from the fixed frame plate; by rotating the rotating handle, the pressure block is abutted against the side of the fixed frame plate, so as to lock the position of the clamping suction cup negative pressure box body on the slide rail.

7. The deputy fixture according to claim 5, characterized in that: A diffuse reflection sensor for sensing whether there is a plate below is provided on the outer side surface of the box body.

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