Positioning device

Abstract

The utility model discloses a positioning device. The positioning device comprises a negative pressure assembly, an adsorption assembly and a micro-motion platform. The negative pressure assembly comprises a negative pressure part, a mandrel and an air exhaust nozzle, the mandrel is arranged on the negative pressure part, and the mandrel can rotate around the axis of the mandrel relative to the negative pressure part; the mandrel is provided with a first air channel, and the air exhaust nozzle is communicated with the first air channel. The adsorption assembly is connected with the mandrel; the adsorption assembly communicates with the air exhaust nozzle through the first air channel so as to adsorb materials. The micro-motion platform is connected to the negative pressure part, the micro-motion platform is configured to drive the negative pressure assembly and the adsorption assembly to move in the first direction and / or the second direction after being subjected to the acting force of the negative pressure part, and the first direction and the second direction are both perpendicular to the axis direction of the mandrel. The adsorption assembly is configured to drive the mandrel to rotate under the acting force of materials, and the negative pressure assembly and the adsorption assembly are made to move in the first direction and the second direction. The positioning device can automatically rectify the position of the material, so that the automatic positioning of the material and the jig is realized, and the assembling precision of the material and the jig is improved.

Description

Technical Field

[0001] This application relates to the field of precision machining technology, and in particular to a positioning device. Background Technology

[0002] In precision assembly and CNC machining, to ensure the positional relationships between the dimensions of various parts and the dimensional correlation between the various clamping positions of the CNC machine tool fixture, a unified positioning datum is required during the assembly and machining processes of each clamping position. For example, during the process of automated equipment placing materials into the fixture clamping positions, material positioning is achieved through the interlocking and cooperation of positioning holes on the material with positioning parts on the fixture. However, in precision assembly and CNC machining processes, if the positioning accuracy is too high, automated equipment may struggle to achieve the required precision, or the accuracy of the automated equipment may be insufficient. Utility Model Content

[0003] In view of this, this application provides a positioning device that can drive materials and fixtures to be automatically positioned, thereby improving the accuracy of material and fixture assembly.

[0004] This application provides a positioning device for driving a material positioning hole to engage with a fixture positioning element. The positioning device includes a negative pressure assembly, an adsorption assembly, and a micro-motion platform. The negative pressure assembly includes a negative pressure element, a mandrel, and an air extraction nozzle. The mandrel is disposed on the negative pressure element and is rotatable relative to the negative pressure element around its own axis. The mandrel has a first air passage, and the air extraction nozzle communicates with the first air passage. The adsorption assembly is connected to the mandrel and communicates with the air extraction nozzle through the first air passage to adsorb material. The micro-motion platform is connected to the negative pressure element and configured to, under the force of the negative pressure element, drive the negative pressure assembly and the adsorption assembly to move in a first direction and / or a second direction, both of which are perpendicular to the axis of the mandrel. The adsorption assembly is configured to, under the force of the material, drive the mandrel to rotate and move the negative pressure assembly and the adsorption assembly in the first and second directions.

[0005] The positioning device achieves vacuum adsorption of the adsorption component through the cooperation of the suction nozzle and the first air channel, thereby adsorbing the material. During the placement of the adsorbed material into the fixture, when the material touches the positioning element on the fixture and there is a positional error between the positioning hole and the positioning element, the positioning element gradually inserts into the positioning hole under the guidance of the positioning hole. The material moves under the force of the positioning element, and this force is applied to the positioning device to adapt both the positioning device and the material to the position of the fixture. When the material rotates, the adsorption component rotates under the force of the material, which in turn drives the spindle to rotate, thus automatically correcting the angular error between the positioning hole and the positioning element. When the material moves, the adsorption component and the negative pressure component are subjected to the force of the material, which causes the micro-motion platform to move the negative pressure component and the adsorption component in the first and / or second directions, thereby automatically correcting the displacement error between the positioning hole and the positioning element. The positioning device enables the material to move and automatically corrects its position, thus achieving automatic positioning of the material and the fixture and improving the assembly accuracy of the material and the fixture.

[0006] In some embodiments, the negative pressure component has a sealed cavity, a mandrel is located in the sealed cavity, the mandrel is provided with a connecting hole, the connecting hole connects the sealed cavity and the first air passage, and the suction nozzle is connected to the sealed cavity.

[0007] Compared to the scheme where the suction nozzle is directly connected to the connecting hole, this embodiment connects the first gas channel and the suction nozzle through a sealed cavity. According to Boyle's law, a constant volume V and pressure P, for a given mass of gas at a constant temperature, the pressure is inversely proportional to the volume. In the scheme where the suction nozzle is directly connected to the connecting hole, the volume is V1 and the pressure is P1; in the scheme where the sealed cavity connects the first gas channel and the suction nozzle, the volume is V2 and the pressure is P2, therefore P1V1 = P2V2. In the sealed cavity scheme, the volume and mass of gas required to create a vacuum within the sealed cavity increase, thus increasing the pressure. This means the actual pressure value is greater than the pressure value when the suction nozzle is directly connected to the connecting hole, thereby increasing the adsorption force of the adsorption component. Furthermore, it helps maintain the vacuum adsorption effect and reduces the risk of material falling when a vacuum leak occurs in the subsequent adsorption component.

[0008] In some embodiments, the negative pressure assembly includes a bearing, the inner circumferential surface of which is fixed to the outer circumference of the spindle, and the outer circumferential surface of which contacts the inner wall of the sealing cavity and is rotatable relative to the inner wall of the sealing cavity.

[0009] The bearing configuration reduces the frictional resistance experienced by the spindle during rotation, which helps the spindle correct angular errors through rotation and improves the smoothness and stability of spindle rotation.

[0010] In some embodiments, the negative pressure assembly includes a seal disposed between the outer peripheral wall of the mandrel and the inner peripheral surface of the bearing.

[0011] The installation of seals can improve the stability of material rotation and enhance the sealing performance of the sealing cavity, which is conducive to ensuring the negative pressure effect of the sealing cavity.

[0012] In some embodiments, the positioning device further includes a reset assembly, which includes a first magnetic element and a second magnetic element. The first magnetic element is disposed on the negative pressure element, and the second magnetic element is disposed on the adsorption assembly. The ends of the first magnetic element and the second magnetic element with opposite magnetic properties are disposed opposite to each other along the axial direction of the mandrel, and there is a magnetic attraction gap between the first magnetic element and the second magnetic element. The reset assembly is configured to drive the mandrel to reset through the magnetic attraction of the first magnetic element and the second magnetic element when the mandrel is deflected.

[0013] Utilizing the principle of attraction between opposite magnetic poles, when the adsorption assembly is not under deflection force, the first and second magnetic components are opposite each other along the axis of the mandrel. When the mandrel is deflected by a certain angle under force, the mandrel causes the adsorption assembly to deflect relative to the negative pressure component, that is, the first and second magnetic components deflect relative to each other along the axis of the mandrel; when the mandrel is not under deflection force, the magnetic attraction between the first and second magnetic components causes the mandrel and the adsorption assembly to automatically reset.

[0014] In some embodiments, the magnetic gap is 0.15 mm to 0.25 mm.

[0015] When the magnetic gap is too large, the magnetic attraction between the first and second magnetic components is easily reduced, making it difficult to reset the mandrel and the adsorption assembly. When the magnetic gap is too small, the magnetic attraction between the first and second magnetic components is too large, making it difficult for the mandrel to overcome the magnetic attraction when under force, thus hindering its deflection. Setting the magnetic gap within the range of 0.15mm to 0.25mm allows the mandrel to automatically correct angular errors, enabling the mandrel and the adsorption assembly to automatically reset.

[0016] In some embodiments, the adsorption assembly includes a suction cup and an airway connector, the airway connector connecting the mandrel and the suction cup, one end of the airway connector extending into a first airway; the airway connector has a second airway communicating with the first airway.

[0017] By setting a second airway in the airway connector, it is possible to connect the suction cup to the spindle, allowing the suction cup to deflect with the spindle, and also to achieve gas communication between the first airway and the suction cup, thus realizing the negative pressure adsorption effect of the suction cup.

[0018] In some embodiments, the suction cup has an adsorption surface and an adsorption channel. The adsorption channel is disposed on the adsorption surface and communicates with a second air channel. The adsorption channel is used to cooperate with the material to form a negative pressure to adsorb the material onto the adsorption surface.

[0019] The suction nozzle, first air channel, second air channel, and adsorption channel are sequentially connected, allowing a negative pressure to be formed within the adsorption channel when the material comes into contact with the adsorption surface, thus achieving the adsorption effect on the material. The design of the adsorption surface helps to keep the material on the same plane, making it less prone to displacement and deformation due to uneven force during the adsorption process.

[0020] In some embodiments, the adsorption channel includes multiple branch channels that are interconnected.

[0021] When a leak occurs in one of the branch channels, the air pressure in the other branch channels can balance the air pressure with that of the leaking branch channel, thus making it easier to maintain the adsorption effect on the material and preventing the material from falling off.

[0022] In some embodiments, the micro-motion platform includes a first slide rail, a second slide rail, and a slider. The slider is connected to a negative pressure member. The slider is slidably connected to the second slide rail along a first direction, and the second slide rail is slidably connected to the first slide rail along a second direction.

[0023] When the adsorption component adsorbs material and installs it onto the fixture, the material moves in the first and second directions under the force of the positioning component. The material then applies the force to the negative pressure component through the adsorption component, causing the negative pressure component to slide along the first direction through the cooperation of the sliding component and the second sliding component to adapt to the material's offset in the first direction. The negative pressure component also slides along the second direction through the cooperation of the second sliding component and the first sliding component to adapt to the material's offset in the second direction, thereby achieving automatic correction of the material in the first and second directions. Attached Figure Description

[0024] Figure 1 This is a perspective view of a positioning device in one embodiment of this application.

[0025] Figure 2 This is a perspective view showing the internal structure of the negative pressure component in one embodiment of this application.

[0026] Figure 3 This is a cross-sectional view of the negative pressure attachment and adsorption component in one embodiment of this application.

[0027] Figure 4 This is a perspective view of a mandrel in one embodiment of this application.

[0028] Figure 5 The positioning device in one embodiment of this application is shown in a three-dimensional view of the adsorption component.

[0029] Explanation of main component symbols

[0030] 100. Positioning device; 10. Negative pressure assembly; 11. Negative pressure component; 111. Sealing cavity; 12. Mandrel; 121. First air passage; 122. Connecting hole; 13. Suction nozzle; 14. Bearing; 15. Sealing component; 20. Adsorption assembly; 21. Air passage connector; 211. Second air passage; 22. Suction cup; 221. Adsorption surface; 222. Adsorption flow channel; 2221. Branch flow channel; 23. Mounting component; 30. Micro-motion platform; 31. First slide rail; 32. Second slide rail; 33. Sliding component; 34. Inflation nozzle; 35. Connecting cavity; 40. Reset assembly; 41. First magnetic component; 42. Second magnetic component; 43. Magnetic gap; L. Axis; X. First direction; Y. Second direction; Z. Third direction.

[0031] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In precision assembly and CNC machining, to ensure the positional relationships between the dimensions of various parts and the dimensional correlation between the various clamping positions of the CNC machine tool fixture, a unified positioning datum is required during the assembly and machining processes of each clamping position. For example, during the process of automated equipment placing materials into the fixture clamping positions, material positioning is achieved through the interlocking and cooperation of positioning holes on the material with positioning parts on the fixture. However, in precision assembly and CNC machining processes, if the positioning accuracy is too high, automated equipment may struggle to achieve the required precision, or the accuracy of the automated equipment may be insufficient.

[0036] This application provides a positioning device for driving a material positioning hole to engage with a fixture positioning element. The positioning device includes a negative pressure assembly, an adsorption assembly, and a micro-motion platform. The negative pressure assembly includes a negative pressure element, a mandrel, and an air extraction nozzle. The mandrel is disposed on the negative pressure element and is rotatable relative to the negative pressure element around its own axis. The mandrel has a first air passage, and the air extraction nozzle communicates with the first air passage. The adsorption assembly is connected to the mandrel and communicates with the air extraction nozzle through the first air passage to adsorb material. The micro-motion platform is connected to the negative pressure element and configured to, under the force of the negative pressure element, drive the negative pressure assembly and the adsorption assembly to move in a first direction and / or a second direction, both of which are perpendicular to the axis of the mandrel. The adsorption assembly is configured to, under the force of the material, drive the mandrel to rotate and move the negative pressure assembly and the adsorption assembly in the first and second directions.

[0037] The positioning device achieves vacuum adsorption of the adsorption component through the cooperation of the suction nozzle and the first air channel, thereby adsorbing the material. During the placement of the adsorbed material into the fixture, when the material touches the positioning element on the fixture and there is a positional error between the positioning hole and the positioning element, the positioning element gradually inserts into the positioning hole under the guidance of the positioning hole. The material moves under the force of the positioning element, and this force is applied to the positioning device, allowing the positioning device and the material to adapt to the position of the fixture. When the material rotates, the adsorption component rotates under the force of the material, which in turn drives the spindle to rotate, thus automatically correcting the angular error between the positioning hole and the positioning element. When the material moves, the adsorption component and the negative pressure component are subjected to the force of the material, enabling the micro-motion platform to move the negative pressure component and the adsorption component in the first and / or second directions, thereby automatically correcting the displacement error between the positioning hole and the positioning element. The positioning device enables material movement and automatic correction of material position, thus achieving automatic positioning of the material and the fixture and improving the assembly accuracy of the material and the fixture.

[0038] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, an embodiment of this application provides a positioning device 100. The fixture is provided with a positioning element, and the material is provided with a positioning hole. The positioning device 100 is used to drive the positioning hole of the material (not shown) to engage with the positioning element of the fixture (not shown). By inserting the positioning element into the positioning hole, the material is positioned and installed on the fixture.

[0040] In some embodiments, the positioning element is a positioning pin, and the end of the positioning pin is provided with a chamfer, which can guide the positioning pin into the positioning hole. When the chamfer of the positioning pin contacts the positioning hole and there is an error in the position of the positioning hole, the positioning device 100 uses its adaptive capability to find the center of the positioning hole and complete the automated assembly operation of the material.

[0041] Please see Figure 1 , Figure 2 and Figure 3 In some embodiments, the positioning device 100 includes a negative pressure component 10, an adsorption component 20, and a micro-motion platform 30. The negative pressure component 10 includes a negative pressure element 11, a spindle 12, and an air extraction nozzle 13. The spindle 12 is disposed on the negative pressure element 11 and is rotatable relative to the negative pressure element 11 about its own axis L. The spindle 12 has a first air passage 121, and the air extraction nozzle 13 communicates with the first air passage 121. The adsorption component 20 is connected to the spindle 12. The adsorption component 20 communicates with the air extraction nozzle 13 through the first air passage 121 to adsorb material. The micro-motion platform 30 is connected to the negative pressure element 11 and is configured such that, when subjected to the force of the negative pressure element 11, the micro-motion platform 30 drives the negative pressure component 10 and the adsorption component 20 to move in a first direction X and / or a second direction Y. Both the first direction X and the second direction Y are perpendicular to the axis L of the spindle 12. The axis L of the spindle 12 is a third direction Z. The adsorption component 20 is configured to rotate the spindle 12 under the force of the material, and to move the negative pressure component 10 and the adsorption component 20 in the first direction X and the second direction Y.

[0042] The positioning device 100 achieves vacuum adsorption of the adsorption component 20 through the cooperation of the suction nozzle 13 and the first air channel 121, thereby achieving the adsorption of materials. During the process of placing the adsorbed material into the fixture, when the material touches the positioning element on the fixture and there is an error between the center position of the positioning hole and the positioning element, the positioning element gradually inserts into the positioning hole under the guidance of the positioning hole. During this process, the material moves under the force of the positioning element and applies the force to the positioning device 100, so that the positioning device 100 and the material can adapt to the position of the fixture.

[0043] When the material rotates, the adsorption component 20 rotates under the force of the material, which in turn drives the spindle 12 to rotate, thereby automatically correcting the angular error between the positioning hole and the positioning element. When the material moves, the adsorption component 20 and the negative pressure component 10 are subjected to the force of the material, which enables the micro-motion platform 30 to move the negative pressure component 10 and the adsorption component 20 in the first direction X and / or the second direction Y, thereby automatically correcting the displacement error between the positioning hole and the positioning element. The positioning device 100 enables the material to move and achieves automatic correction of the material's position, thereby achieving automatic positioning of the material and the fixture and improving the assembly accuracy of the material and the fixture.

[0044] In some embodiments, the axis L of the mandrel 12 is aligned with the direction of gravity, the first direction X and the second direction Y are perpendicular to each other, and the plane containing the first direction X and the second direction Y is a horizontal plane. By adjusting the micro-motion platform 30, the material and fixture can automatically correct errors in the horizontal direction; by rotating the mandrel 12, the material and fixture can automatically correct angular errors, thereby improving the assembly accuracy of the material and fixture.

[0045] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the negative pressure component 11 has a sealing cavity 111. The mandrel 12 is located in the sealing cavity 111 and is provided with a connecting hole 122, which connects the sealing cavity 111 and the first air passage 121. The suction nozzle 13 is connected to the sealing cavity 111.

[0046] Compared to the scheme where the suction nozzle 13 is directly connected to the connecting hole 122, this embodiment connects the first gas channel 121 and the suction nozzle 13 through the sealing cavity 111. According to Boyle's Law, for a given volume V and pressure P, PV = constant, the pressure of a gas of a certain mass is inversely proportional to its volume when the temperature remains constant. In the scheme where the suction nozzle 13 is directly connected to the connecting hole 122, the volume is V1 and the pressure is P1; in the scheme where the sealing cavity 111 connects the first gas channel 121 and the suction nozzle 13, the volume is V2 and the pressure is P2, therefore P1V1 = P2V2. In the scheme with the sealing cavity 111, the volume and mass of the gas that needs to be extracted to form a vacuum in the sealing cavity 111 increase, thus increasing the pressure. That is, the actual pressure value formed is greater than the pressure value when the suction nozzle 13 is directly connected to the connecting hole 122, thereby increasing the adsorption force of the adsorption component 20. In addition, when a vacuum leak occurs in the subsequent adsorption component 20, it is also beneficial to maintain the vacuum adsorption effect and reduce the risk of material falling.

[0047] Please see Figure 3 and Figure 4 In some embodiments, the negative pressure assembly 10 includes a bearing 14, the inner peripheral surface of which is fixed to the outer peripheral surface of the spindle 12, and the outer peripheral surface of the bearing 14 is in contact with the inner wall of the sealing cavity 111 and can rotate relative to the inner wall of the sealing cavity 111.

[0048] The bearing 14 reduces the frictional resistance experienced by the spindle 12 during rotation, which helps the spindle 12 correct angular errors through rotation and improves the smoothness and stability of the spindle 12's rotation.

[0049] Please see Figure 3 and Figure 4In some embodiments, two bearings 14 are provided, and the two bearings 14 are spaced apart along the axial direction of the spindle 12. By providing two bearings 14 between the spindle 12 and the inner wall of the sealing cavity 111, the smoothness and stability of the rotation of the spindle 12 are further improved.

[0050] Please see Figure 3 and Figure 4 In some embodiments, the negative pressure assembly 10 includes a seal 15 disposed between the outer peripheral wall of the spindle 12 and the inner peripheral surface of the bearing 14. For example, the seal 15 is a sealing ring.

[0051] The sealing element 15 can improve the stability of material rotation and enhance the sealing performance of the sealing cavity 111, which is conducive to ensuring the negative pressure effect of the sealing cavity 111.

[0052] Please see Figure 1 and Figure 2 In some embodiments, the positioning device 100 further includes a reset assembly 40, which includes a first magnetic element 41 and a second magnetic element 42. The first magnetic element 41 is disposed on the negative pressure element 11, and the second magnetic element 42 is disposed on the adsorption assembly 20. The ends of the first magnetic element 41 and the second magnetic element 42 with opposite magnetic properties are disposed opposite to each other along the axis L of the mandrel 12, and a magnetic attraction gap 43 is provided between the first magnetic element 41 and the second magnetic element 42. The reset assembly 40 is configured to drive the mandrel 12 to reset through the magnetic attraction of the first magnetic element 41 and the second magnetic element 42 when the mandrel 12 is deflected.

[0053] Utilizing the principle of attraction between opposite magnetic poles, when the adsorption assembly 20 is not under deflection force, the first and second magnetic components are opposite each other along the axis L of the spindle 12. When the spindle 12 is deflected by a certain angle under force, the spindle 12 causes the adsorption assembly 20 to deflect relative to the negative pressure component 11, that is, the first and second magnetic components deflect relative to each other along the axis L of the spindle 12; when the spindle 12 is not under deflection force, the magnetic attraction between the first magnetic component 41 and the second magnetic component 42 causes the spindle 12 and the adsorption assembly 20 to automatically reset.

[0054] In some embodiments, both the first magnetic element 41 and the second magnetic element 42 are permanent magnets, with a portion of the permanent magnet exposed. For example, the exposed portion of the first magnetic element 41 is the S pole, and the other portion of the first magnetic element 41 is embedded in the negative pressure element 11; the exposed portion of the second magnetic element 42 is the N pole, and the other portion of the second magnetic element 42 is embedded in the adsorption assembly 20. Utilizing the principle of like poles repelling and unlike poles attracting, when the adsorption assembly 20 is tilted at a certain angle relative to the negative pressure element 11, the magnetic attraction between the N pole and the S pole automatically resets the mandrel 12 and the adsorption assembly 20.

[0055] In some embodiments, the magnetic gap 43 is 0.15 mm to 0.25 mm. For example, the magnetic gap 43 is 0.15 mm, 0.18 mm, 0.2 mm, 0.22 mm or 0.25 mm.

[0056] When the magnetic gap 43 is too large, it easily reduces the magnetic attraction between the first magnetic element 41 and the second magnetic element 42, making it difficult to reset the mandrel 12 and the adsorption assembly 20. When the magnetic gap 43 is too small, the magnetic attraction between the first magnetic element 41 and the second magnetic element 42 is too large, making it difficult for the mandrel 12 to overcome the magnetic attraction when subjected to force, and making it difficult to deflect. The magnetic gap 43 is set in the range of 0.15mm to 0.25mm, which allows the mandrel 12 to automatically reset with the adsorption assembly 20 while the mandrel 12 can automatically correct the angle error.

[0057] Please see Figure 1 and Figure 2 In some embodiments, multiple first magnetic elements 41 and second magnetic elements 42 are provided, with each first magnetic element 41 corresponding to one second magnetic element 42. The adsorption force between the multiple first magnetic elements 41 and second magnetic elements 42 enables the adsorption assembly 20 and the mandrel 12 to automatically reset relative to the negative pressure element 11. For example, five first magnetic elements 41 and five second magnetic elements 42 are provided, and they are distributed at intervals around the axis L of the mandrel 12.

[0058] Please see Figure 3 In some embodiments, the adsorption assembly 20 includes an airway connector 21, a suction cup 22, and a mounting member 23, with a second magnetic element 42 disposed on the mounting member 23. The suction cup 22 is disposed on the side of the mounting member 23 facing away from the second magnetic element 42. The airway connector 21 connects the mandrel 12 and the suction cup 22, with one end of the airway connector 21 extending into a first airway 121. The airway connector 21 has a second airway 211, which communicates with the first airway 121.

[0059] By setting a second airway 211 in the airway connector 21, the suction cup 22 can be connected to the spindle 12, allowing the suction cup 22 to deflect with the spindle 12, and the first airway 121 can be connected to the suction cup 22, thus achieving the negative pressure adsorption effect of the suction cup 22.

[0060] Please see Figure 3 In some embodiments, the airway connector 21 is a hollow bolt, and the second airway 211 is arranged along the axial direction of the hollow bolt, so that the airflow of the suction cup 22 is drawn to a vacuum state through the second airway 211, thereby realizing the negative pressure adsorption capability of the suction cup 22.

[0061] Please see Figure 5In some embodiments, the suction cup 22 has an adsorption surface 221 and an adsorption channel 222. The adsorption channel 222 is disposed on the adsorption surface 221 and communicates with the second air channel 211. The adsorption channel 222 is used to cooperate with the material to form a negative pressure to adsorb the material onto the adsorption surface 221.

[0062] The suction nozzle 13, the first air passage 121, the second air passage 211, and the adsorption channel 222 are sequentially connected, so that when the material comes into contact with the adsorption surface 221, the side of the adsorption channel 222 facing the material is sealed by the material, and a negative pressure is formed inside the adsorption channel 222, thereby achieving the adsorption effect on the material. The setting of the adsorption surface 221 helps to control the material on the same plane, so that the material is not prone to displacement and deformation due to uneven force during the adsorption process.

[0063] Please see Figure 5 In some embodiments, the adsorption channel 222 includes a plurality of branch channels 2221, which are interconnected.

[0064] When a leak occurs in a branch channel 2221, the air pressure in other branch channels 2221 can balance the air pressure with that of the leaking branch channel 2221, thus making it easier to maintain the adsorption effect on the material and preventing the material from falling off.

[0065] In some embodiments, the suction cup 22 is made of urethane rubber, which has properties such as cushioning and wear resistance, effectively improving the adsorption effect of the suction cup 22 on the material and reducing the wear on the material during the adsorption process.

[0066] Please see Figure 1 In some embodiments, the micro-motion platform 30 includes a first slide rail 31, a second slide rail 32 and a slider 33. The slider 33 is connected to the negative pressure member 11. The slider 33 is slidably connected to the second slide rail 32 along the first direction X, and the second slide rail 32 is slidably connected to the first slide rail 31 along the second direction Y.

[0067] When the adsorption component 20 adsorbs material and installs it onto the fixture, the material moves in the first direction X and the second direction Y under the force of the positioning component. The material applies the force to the negative pressure component 10 through the adsorption component 20, so that the negative pressure component 11 slides along the first direction X through the cooperation of the sliding component 33 and the second sliding component 33 to adapt to the offset of the material in the first direction X. The negative pressure component 11 slides along the second direction Y through the cooperation of the second sliding component 33 and the first sliding component 33 to adapt to the offset of the material in the second direction Y, thereby realizing the automatic correction of the material in the first direction X and the second direction Y.

[0068] Please see Figure 1In some embodiments, the micro-motion platform 30 has an air inlet 34 and a connecting cavity 35. The connecting cavity 35 is formed between the first slide rail 31, the second slide rail 32, and the sliding member 33. The air inlet 34 communicates with the connecting cavity 35, and a reset core (not shown) is provided inside the connecting cavity 35. The axial direction of the reset core is the same as the axial direction of the spindle 12. The reset core has an initial position, which is located at the center of the connecting cavity 35. When the air inlet 34 inflates the connecting cavity 35, the gas drives the reset core back to the initial position and restricts the relative movement of the first slide rail 31, the second slide rail 32, and the sliding member 33 in the first direction X and the second direction Y. After the air inlet 34 stops inflating the connecting cavity 35, the reset core releases the restriction on the first slide rail 31, the second slide rail 32, and the sliding member 33, so that the sliding member 33 has a certain displacement relative to the first slide rail 31 in the first direction X, and the first slide rail 31 has a certain displacement relative to the second slide rail 32 in the second direction Y.

[0069] For example, after the inflation nozzle 34 stops inflating the connecting cavity 35, the sliding member 33 has a displacement of 0.8 mm relative to the first slide rail 31 in the first direction X, and the first slide rail 31 has a displacement of 0.8 mm relative to the second slide rail 32 in the second direction Y. This allows the first slide rail 31 and the sliding member 33 to provide a correction displacement after the inflation nozzle 34 stops inflating, which helps improve the accuracy of material and fixture assembly.

[0070] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A positioning device for driving a positioning hole of a material to engage with a positioning element of a fixture, characterized in that, The positioning device comprises: a negative pressure assembly comprising a negative pressure element, a mandrel and a suction nozzle, the mandrel being arranged on the negative pressure element and being rotatable relative to the negative pressure element about an axis of the mandrel; the mandrel having a first air passage, the suction nozzle being in communication with the first air passage; an adsorption assembly connected to the mandrel; the adsorption assembly being in communication with the suction nozzle through the first air passage to adsorb the material; a micro-motion platform connected to the negative pressure element, the micro-motion platform being configured to move the negative pressure assembly and the adsorption assembly in a first direction and / or a second direction under the action of the negative pressure element, the first direction and the second direction being perpendicular to the axis of the mandrel; the adsorption assembly being configured to rotate the mandrel under the action of the material and move the negative pressure assembly and the adsorption assembly in the first direction and the second direction.

2. The positioning device of claim 1, wherein, the negative pressure element has a sealed cavity, the mandrel being located in the sealed cavity, the mandrel being provided with a communication hole, the communication hole being in communication with the sealed cavity and the first air passage, and the suction nozzle being in communication with the sealed cavity.

3. The positioning device of claim 2, wherein, the negative pressure assembly comprises a bearing, an inner periphery of the bearing being fixed to an outer periphery of the mandrel, and an outer periphery of the bearing being in contact with an inner wall of the sealed cavity and being rotatable relative to the inner wall of the sealed cavity.

4. The positioning device of claim 3, wherein, the negative pressure assembly comprises a sealing element arranged between an outer peripheral wall of the mandrel and an inner periphery of the bearing.

5. The positioning device of claim 1, wherein, the positioning device further comprises a reset assembly, the reset assembly comprising a first magnetic element and a second magnetic element, the first magnetic element being arranged on the negative pressure element, and the second magnetic element being arranged on the adsorption assembly; one end of the first magnetic element and the second magnetic element being arranged opposite along the axis of the mandrel, and the first magnetic element and the second magnetic element having a magnetic attraction gap therebetween; the reset assembly being configured to drive the mandrel to reset through the magnetic attraction between the first magnetic element and the second magnetic element when the mandrel is deflected.

6. The positioning device of claim 5, wherein, the magnetic attraction gap is 0.15mm to 0.25mm.

7. The positioning device of claim 1, wherein, the adsorption assembly comprises a suction disc and an air passage connector, the air passage connector connecting the mandrel and the suction disc, one end of the air passage connector extending into the first air passage; the air passage connector having a second air passage, the second air passage being in communication with the first air passage.

8. The positioning device of claim 7, wherein, the suction disc has an adsorption surface and an adsorption flow passage, the adsorption flow passage being arranged on the adsorption surface and being in communication with the second air passage, the adsorption flow passage being used to form a negative pressure adsorption to adsorb the material on the adsorption surface.

9. The positioning device of claim 8, wherein, the adsorption flow passage comprises a plurality of branch flow passages, the plurality of branch flow passages being in communication with each other.

10. The positioning device of claim 1, wherein, the micro-motion platform comprises a first sliding rail, a second sliding rail and a sliding element, the sliding element being connected to the negative pressure element, the sliding element being slidably connected to the second sliding rail in the first direction, and the second sliding rail being slidably connected to the first sliding rail in the second direction.

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