Suction tool

Abstract

The utility model provides a suction tool. The suction tool comprises a substrate. An adsorption surface and an adsorption part are arranged on the base plate, the adsorption part comprises an adsorption cavity and a plunger, and the adsorption cavity penetrates through the adsorption surface and is provided with a large air hole communicated with the outer side of the base plate; a negative pressure channel is further formed in the base plate; a sliding section, ventilation sections, a sealing section and a control section are sequentially arranged on the plunger, any ventilation section is communicated with the negative pressure channel, and the end, back on to the ventilation sections, of the sliding section is communicated with the large air hole; when the control section extends out of the adsorption surface, the sealing section and the adsorption cavity are attached and sealed; when the control section is pressed downwards to be flush with the adsorption face or located below the adsorption face under the gravity effect of the workpiece, a gap is reserved between the sealing section and the adsorption cavity so that the adsorption face can adsorb the workpiece through the negative pressure environment provided by the negative pressure channel. According to the suction tool, when the size of the workpiece is smaller than that of the suction face of the suction tool, the suction face can effectively suck the workpiece, the suction effect of the suction tool on the workpiece is improved, and the application range of the suction tool is widened.

Description

Technical Field

[0001] The present application relates to the technical field of negative pressure adsorption, and in particular to a suction device. Background Art

[0002] During the workpiece processing, it is sometimes necessary to fix the workpiece by a gripper to facilitate subsequent processing or grinding of the workpiece. A conventional porous gripper generally has a plurality of adsorption holes on its adsorption surface, and the workpiece is adsorbed by evacuating the plurality of adsorption holes.

[0003] At present, the adsorption surface of conventional porous grippers is a planar structure with a fixed size, but according to actual processing needs, the size of the workpiece to be processed to be adsorbed by the porous gripper is diverse. In the process of realizing the invention, the inventor found that the conventional porous gripper has a good adsorption effect on the workpiece with a size comparable to the adsorption surface, but when the size of the workpiece is smaller than the adsorption surface of the gripper, the adsorption holes on the adsorption surface that are not in contact with the workpiece are in an open state and have air leakage problems, which affects the negative pressure value generated by the adsorption surface, greatly reduces the adsorption force of the gripper on the workpiece, and reduces the scope of application of the gripper. Utility Model Content

[0004] The present application provides a gripper to solve the problems existing in the prior art. When the size of the workpiece is smaller than the adsorption surface of the gripper, the adsorption surface can effectively adsorb the workpiece, thereby improving the adsorption effect of the gripper on the workpiece and increasing the application range of the gripper.

[0005] The present application provides a suction device, comprising: a substrate; a suction surface and at least three suction parts are arranged on the substrate, any of the suction parts comprises a suction cavity and a plunger slidably arranged in the suction cavity, any of the suction cavities passes through the suction surface and is provided with a large air hole connected to the outside of the substrate; a negative pressure channel providing a negative pressure environment is also provided in the substrate; a sliding section, a ventilation section, a sealing section and a control section are arranged in sequence along the sliding direction on the plunger, the sliding section seals and slides in the suction cavity, and any of the ventilation sections maintains connection with the negative pressure channel The end of the sliding section facing away from the ventilation section is connected to the large air hole; when the control section extends out of the adsorption surface, the sealing section is sealed in contact with the adsorption cavity, and maintains a sealed state under the pressure difference between the negative pressure of the ventilation section in the adsorption cavity and the atmospheric pressure on the side of the sliding section facing away from the ventilation section; when the control section is pressed down to be flush with the adsorption surface or below the adsorption surface under the gravity of the workpiece, a gap is left between the sealing section and the adsorption cavity to enable the adsorption surface to adsorb the workpiece through the negative pressure environment provided by the negative pressure channel.

[0006] Optionally, an adsorption groove is provided on the adsorption surface, an opening of the adsorption cavity penetrating the adsorption surface is a adsorption port, the adsorption port is located at the bottom of the adsorption groove, and the size of the groove of the adsorption groove is larger than the size of the adsorption port.

[0007] Optionally, the sealing section is a conical section, and the adsorption chamber includes a conical surface that fits and seals with the sealing section.

[0008] Optionally, the ventilation section is provided with a first step, the adsorption chamber includes a cylindrical surface, the outer diameter of the bottom surface of the conical surface is smaller than the inner diameter of the cylindrical surface to define a second step at the junction of the conical surface and the cylindrical surface; when the sealing section is sealed and fitted on the conical surface, the first step abuts against the second step.

[0009] Optionally, the ventilation section is a cylindrical section, the cylindrical surface is arranged on the outside of the cylindrical section, and an annular gap is left between the cylindrical surface and the cylindrical section.

[0010] Optionally, the suction device further comprises at least three blocking blocks, the at least three blocking blocks are respectively blocked on at least three adsorption chambers, and at least three large air holes are respectively opened on the three blocking blocks.

[0011] Optionally, the control section is a columnar section, and the inner diameter of the adsorption port is larger than the outer diameter of the control section.

[0012] Optionally, at least three of the adsorption parts define at least one adsorption group, and any of the adsorption groups includes at least two adsorption parts arranged in sequence.

[0013] Optionally, the negative pressure channel is connected to all the adsorption chambers in one adsorption group in sequence.

[0014] Optionally, the number of the adsorption groups is at least two, the at least two adsorption groups are arranged in sequence, and the arrangement direction of the at least two adsorption groups is perpendicular to the arrangement direction of at least two adsorption cavities in any one of the adsorption groups.

[0015] In the suction device provided by the embodiment of the present application, when a workpiece smaller than the size of the suction surface is placed on the suction surface, the workpiece presses the control section of the suction part below it down to be retracted and flush with the suction surface or below the suction surface, and a gap is left between the sealing section of the plunger and the suction chamber, so that the negative pressure channel is connected to the workpiece through the gap between the ventilation section, the sealing section and the suction chamber, and the workpiece is in a negative pressure environment and is stably adsorbed on the suction surface. At this time, in the suction part on the suction surface located outside the workpiece, the control section overcomes its own gravity and extends out of the suction surface under the pressure difference between the negative pressure environment of the ventilation section and the atmospheric environment on the side of the sliding section facing away from the ventilation section, and at this time, the sealing section and the suction chamber are sealed in contact, and the control section is in a state of extending out of the suction surface under the joint action of the negative pressure environment of the ventilation section and the atmospheric environment on the side of the sliding section facing away from the ventilation section, so as to seal the suction part on the suction surface located outside the workpiece, avoid the problem of air leakage, ensure the adsorption force of the suction part below the workpiece, improve the suction effect of the suction device on the workpiece, and increase the scope of application of the suction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present application, wherein:

[0017] Figure 1 A schematic structural diagram of the control sections of the four adsorption parts in the substrate provided in an optional embodiment of the present application retracting to below the adsorption surface.

[0018] Figure 2 for Figure 1 A partial enlarged view of middle A.

[0019] Figure 3 A schematic diagram of the structure of placing a workpiece on the adsorption surface of a substrate provided in an optional embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100-substrate;

[0022] 1-adsorption surface, 10-adsorption slot;

[0023] 2-adsorption part, 20-adsorption chamber, 200-large air hole, 201-adsorption port, 202-conical surface, 203-cylindrical surface, 204-second step; 21-plunger, 210-sliding section, 211-ventilation section, 212-sealing section, 213-control section, 214-first step;

[0024] 3- Negative pressure channel;

[0025] 4-blocking block;

[0026] 5- Workpiece. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the respective drawings. The words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. They are relative concepts, and therefore may change accordingly according to their different locations and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0028] The present application provides a gripper, comprising: a substrate 100 .

[0029] Please refer to Figure 1 The substrate 100 is provided with an adsorption surface 1 and at least three adsorption parts 2, each of the adsorption parts 2 includes an adsorption cavity 20 and a plunger 21 slidably disposed in the adsorption cavity 20, and each of the adsorption cavities 20 passes through the adsorption surface 1 and has an air hole 200. The air hole 200 can be connected to the atmosphere outside the substrate 100, so that the atmosphere is connected between the side of the adsorption cavity 20 where the air hole 200 is opened and the plunger 21.

[0030] The substrate 100 is also provided with a negative pressure channel 3 connected to at least three adsorption chambers 20. The negative pressure channel 3 is used to provide a negative pressure environment, and the negative pressure channel 3 can be connected to a vacuum pump to maintain the negative pressure environment in the negative pressure channel 3.

[0031] The plunger 21 is provided with a sliding section 210, a venting section 211, a sealing section 212 and a control section 213 arranged in sequence along the sliding direction. The sliding section 210 is sealed and slidable in the adsorption chamber 20, and the venting section 211 is connected to the negative pressure channel 3. The end of the sliding section 210 facing away from the venting section 211 is connected to the air hole 200.

[0032] When the control section 213 extends out of the adsorption surface 1, the sealing section 212 is in close contact with the adsorption chamber 20 and is sealed therewith, and is maintained in a close contact and sealed state under the pressure difference between the normal pressure in the adsorption chamber 20 and the negative pressure of the ventilation section 211; when the control section 213 is pressed down to be flush with the adsorption surface 1 or is located under the adsorption surface 1 under the gravity of the workpiece 5, a gap is left between the sealing section 212 and the adsorption chamber 20 so that the adsorption chamber 20 can adsorb the workpiece 5 through the negative pressure environment provided by the negative pressure channel 3.

[0033] In the suction device provided in the embodiment of the present application, when a workpiece 5 smaller than the size of the suction surface 1 is placed on the suction surface 1, the workpiece 5 presses the control section 213 of the suction portion 2 below it down to be retracted to be flush with the suction surface 1 or below the suction surface 1, and a gap is left between the sealing section 212 of the plunger 21 and the suction chamber 20, so that the negative pressure channel 3 is connected to the workpiece 5 through the gap between the ventilation section 211, the sealing section 212 and the suction chamber 20, and the workpiece 5 is in a negative pressure environment and is stably adsorbed on the suction surface 1. At this time, in the adsorption part 2 on the adsorption surface 1 located on the outside of the workpiece 5, the control section 213 overcomes its own gravity and extends out of the adsorption surface 1 under the pressure difference between the negative pressure environment of the ventilation section 211 and the atmospheric environment on the side of the sliding section 210 facing away from the ventilation section 211. At this time, the sealing section 212 is in close contact with the adsorption cavity 20 and sealed. Under the combined action of the negative pressure environment of the ventilation section 211 and the atmospheric environment on the side of the sliding section 210 facing away from the ventilation section 211, the control section 213 is in a state of extending out of the adsorption surface 1, so as to seal the adsorption part 2 on the adsorption surface 1 located on the outside of the workpiece 5, avoid air leakage, ensure the adsorption force of the adsorption part 2 under the workpiece 5, improve the adsorption effect of the suction device on the workpiece 5, and increase the application range of the suction device.

[0034] As an optional embodiment, the adsorption surface 1 is provided with an adsorption groove 10, the adsorption cavity 20 penetrating the adsorption surface 1 is an opening of the adsorption port 201, the adsorption port 201 is located at the bottom of the adsorption groove 10, and the size of the groove of the adsorption groove 10 is larger than the size of the adsorption port 201. Figure 2 As shown, the notch of the adsorption groove 10 is set larger, which can provide a larger adsorption action surface for the workpiece 5 adsorbed on the adsorption surface 1, thereby increasing the stability of the workpiece 5 adsorbed on the adsorption surface 1.

[0035] As an optional embodiment, the sealing section 212 is a conical section, and the adsorption chamber 20 includes a conical surface 202 that is in close contact with the sealing section 212. Figures 1 to 3 The conical surface 202 and the conical section are designed to cooperate so that when the workpiece 5 is not arranged above the adsorption portion 2, the conical surface 202 and the conical section are in close contact and sealed with each other, thereby maintaining the sealing of the adsorption portion 2; and when the workpiece 5 is arranged above the adsorption portion 2, the sealing section 212 is pressed downward to leave a channel connected to the negative pressure channel 3 between the conical section and the conical surface 202, so that the workpiece 5 is adsorbed by the negative pressure environment in the adsorption groove 10 below.

[0036] As an optional embodiment, the ventilation section 211 is provided with a first step 214, the adsorption chamber 20 includes a cylindrical surface 203, the outer diameter of the bottom surface of the conical surface 202 is smaller than the inner diameter of the cylindrical surface 203 to define a second step 204 at the junction of the conical surface 202 and the cylindrical surface 203; when the sealing section 212 is sealed against the conical surface 202, the first step 214 is sealed against the second step 204. Figure 1 and Figure 3 As shown, the second step 204 has a limiting effect on the first step 214. At the same time, through the bonding effect of the first step 214 and the second step 204 when they are in contact with each other, the sealing effect of the sealing section 212 of the adsorption part 2 between the adsorption surface 1 and the negative pressure channel 3 is further increased when no workpiece is set.

[0037] As an optional embodiment, the ventilation section 211 is a cylindrical section, the cylindrical surface 203 is arranged on the outside of the cylindrical section, and an annular gap is left between the cylindrical surface 203 and the cylindrical section. The ventilation section 211 in the embodiment of the present application can be a cylindrical section or a polygonal section, the cylindrical surface 203 is a cylindrical surface or a polygonal surface adapted thereto, and an annular gap is left between the outer side surface of the ventilation section 211 and the cylindrical surface 203, so that the space between the ventilation section 211 and the adsorption chamber 20 is fully connected with the negative pressure channel 3.

[0038] As an optional embodiment, the suction device further comprises at least three blocking blocks 4, the at least three blocking blocks 4 are respectively blocked on at least three adsorption chambers 20, and at least three air holes 200 are respectively opened on the three blocking blocks 4. Figures 1 to 3 After processing, each adsorption chamber 20 is sealed by a sealing block 4. The sealing block 4 limits the plunger 21 in the adsorption chamber 20. At the same time, the large air hole 200 located on the sealing block 4 enables the part of the adsorption chamber 20 located on the side of the sliding section 210 facing away from the sealing section 212 to be connected with the external atmosphere.

[0039] As an optional embodiment, the control section 213 is a columnar section, and the inner diameter of the suction port 201 is larger than the outer diameter of the control section 213. The control section 213 is a columnar section so that its outer diameter value along the axial direction is kept consistent, so that the control section 213 can slide smoothly along the suction port 201, ensuring that the control section 213 is normally extended or retracted.

[0040] As an optional embodiment, at least three adsorption parts 2 define at least one adsorption group, and any adsorption group includes at least two adsorption parts 2 arranged in sequence. Figure 1 and Figure 3Six adsorption parts 2 can be arranged in one adsorption group. When a workpiece 5 whose size is smaller than the adsorption surface 1 is arranged on the adsorption surface 1, it is covered above four adsorption cavities 20 and adsorbed on the adsorption surface 1 through the four adsorption cavities 20, which is stable and reliable.

[0041] As an optional embodiment, the negative pressure channel 3 is connected to all the adsorption chambers 20 in one adsorption group in sequence. Figure 1 and Figure 3 All the adsorption cavities 20 in the adsorption group are connected through the negative pressure channel 3, which improves the efficiency of the negative pressure channel 3 in providing negative pressure and reduces the path of the negative pressure channel 3 in the substrate 100.

[0042] As an optional embodiment, the number of the adsorption groups is at least two, and the at least two adsorption groups are arranged in sequence, and the arrangement direction of the at least two adsorption groups is perpendicular to the arrangement direction of at least two adsorption cavities 20 in any adsorption group. In this embodiment of the application, multiple workpieces 5 can be placed on the adsorption surface 1 at the same time, thereby improving the working efficiency of the adsorption surface 1.

[0043] The present invention is intended to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A suction device, characterized in that: include: substrate; The substrate is provided with an adsorption surface and at least three adsorption parts, each of the adsorption parts comprises an adsorption cavity and a plunger slidably arranged in the adsorption cavity, and each of the adsorption cavities passes through the adsorption surface and is provided with a large air hole communicating with the outside of the substrate; A negative pressure channel for providing a negative pressure environment is also provided in the substrate; The plunger is provided with a sliding section, a ventilation section, a sealing section and a control section arranged in sequence along the sliding direction, the sliding section slides in the adsorption chamber in a sealed manner, any of the ventilation sections is connected to the negative pressure channel, and one end of the sliding section facing away from the ventilation section is connected to the large air hole; When the control section extends out of the adsorption surface, the sealing section is in close contact with the adsorption chamber and sealed, and maintains a close contact and sealing state under the pressure difference between the negative pressure of the ventilation section in the adsorption chamber and the atmospheric pressure on the side of the sliding section facing away from the ventilation section; when the control section is pressed down to be flush with the adsorption surface or below the adsorption surface under the gravity of the workpiece, a gap is left between the sealing section and the adsorption chamber to enable the adsorption surface to adsorb the workpiece through the negative pressure environment provided by the negative pressure channel.

2. The suction device according to claim 1, characterized in that: The adsorption surface is provided with an adsorption groove, the opening of the adsorption cavity penetrating the adsorption surface is the adsorption port, the adsorption port is located at the bottom of the adsorption groove, and the size of the groove of the adsorption groove is larger than the size of the adsorption port.

3. The suction device according to claim 1, characterized in that: The sealing section is a conical section, and the adsorption chamber comprises a conical surface which is in close contact and sealed with the sealing section.

4. The suction device according to claim 3, characterized in that: The ventilation section is provided with a first step, the adsorption chamber includes a cylindrical surface, the outer diameter of the bottom surface of the conical surface is smaller than the inner diameter of the cylindrical surface to define a second step at the junction of the conical surface and the cylindrical surface; When the sealing section is sealingly attached to the conical surface, the first step abuts against the second step.

5. The suction device according to claim 4, characterized in that: The ventilation section is a cylindrical section, the cylindrical surface is arranged on the outer side of the cylindrical section, and an annular gap is left between the cylindrical surface and the cylindrical section.

6. The suction device according to any one of claims 1 to 5, characterized in that: The suction device further comprises at least three blocking blocks, wherein the at least three blocking blocks are respectively blocked on at least three adsorption chambers, and at least three large air holes are respectively opened on the three blocking blocks.

7. The suction device according to claim 2, characterized in that: The control section is a columnar section, and the inner diameter of the adsorption port is larger than the outer diameter of the control section.

8. The suction device according to claim 7, characterized in that: At least three of the adsorption parts define at least one adsorption group, and any of the adsorption groups includes at least two adsorption parts arranged in sequence.

9. The suction device according to claim 8, characterized in that: The negative pressure channel is connected to all the adsorption chambers in one adsorption group in sequence.

10. The suction device according to claim 8, characterized in that: The number of the adsorption groups is at least two, and the at least two adsorption groups are arranged in sequence, and the arrangement direction of the at least two adsorption groups is perpendicular to the arrangement direction of the at least two adsorption cavities in any one of the adsorption groups.

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