Positioning device

Abstract

A positioning device comprises a bearing assembly which comprises a bearing piece used for bearing a workpiece; two of the four clamping assemblies are oppositely arranged on the two sides of the bearing piece in the first direction, the other two clamping assemblies are oppositely arranged on the other two sides of the bearing piece in the second direction, and each clamping assembly comprises a clamping piece rotationally connected with the bearing piece and an elastic piece connected with the clamping piece and the bearing piece; the magnetic assemblies are asymmetrically arranged in the first direction and / or the second direction and each comprise a magnetic piece arranged on the side wall of the bearing piece and a magnetic attraction piece arranged on the clamping piece and corresponding to the magnetic piece; and the four groups of pushing assemblies are movably arranged on the bearing piece in a penetrating manner. When the positioning device receives a workpiece or loosens the workpiece, the four clamping pieces are synchronously opened, interference between the workpiece and the clamping pieces is avoided, the quality of the workpiece is improved, when the workpiece is positioned, the four clamping pieces are sequentially contracted and clamped and positioned to the bearing piece, movable gaps between the clamping pieces and the workpiece are avoided, and the positioning precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, in particular to a positioning device. Background Art

[0002] Nowadays, in order to improve the processing accuracy of workpieces, positioning devices are usually used to position the circumference of the workpiece to facilitate the processing equipment to accurately process the workpiece.

[0003] The positioning device generally has two positioning modes: fixed positioning and movable positioning. When the positioning device fixes the workpiece, the workpiece is placed in the middle of four positioning members fixedly set on the carrier, so that the four positioning members can position the outer periphery of the workpiece. However, there is generally a certain movable gap between the fixed positioning members and the workpiece, which makes it difficult to accurately position the workpiece to the preset position; when the positioning device movably positions the workpiece, four cylinders are used to drive the four positioning members to move close to the circumference of the workpiece, so that the four positioning members clamp and position the outer periphery of the workpiece. However, the clamping force applied to the workpiece by the positioning members is too large, resulting in friction and damage between the circumference of the workpiece and the positioning members when the workpiece is removed from the positioning device, thereby reducing the quality of the workpiece. Utility Model Content

[0004] In view of the above situation, it is necessary to provide a positioning device to improve the positioning accuracy and the quality of the workpiece.

[0005] The present application provides a positioning device for positioning a workpiece, comprising: a bearing assembly, comprising a bearing member, the bearing member being used to bear the workpiece; four groups of clamping assemblies, wherein two groups of the clamping assemblies are relatively arranged on two sides of the bearing member along a first direction, and the other two groups of the clamping assemblies are relatively arranged on the other two sides of the bearing member along a second direction perpendicular to the first direction, each group of the clamping assemblies comprises a clamping member and an elastic member, the clamping member is rotatably connected to the bearing member, and the two ends of the elastic member are respectively connected to the clamping member and the bearing member to make the clamping member face the bearing member. The carrier shrinks and clamps the workpiece; a plurality of groups of magnetic components are asymmetrically distributed along the first direction and / or the second direction and are used to cooperate with the elastic member to make the shrinkage speeds of two groups of clamping components arranged relatively in the same direction different, each group of the magnetic components includes matching magnetic parts and magnetic suction parts, the magnetic parts are arranged on the side walls of the carrier, and the magnetic suction parts are arranged on the clamping parts of the clamping components corresponding to the side walls; four groups of pushing components are respectively arranged in one-to-one correspondence with the four groups of clamping components and are all movably penetrated through the carrier to push the clamping parts to release the workpiece.

[0006] When the positioning device is used, when receiving the workpiece to be positioned or loosening the positioned workpiece, the four clamping members are respectively opened synchronously and the corresponding elastic members are stretched under the push of the corresponding pushing components, so that the workpiece is stably placed on the carrier or the workpiece is stably removed from the carrier, avoiding interference between the workpiece and the clamping members and between the clamping members, thereby improving the quality of the workpiece; when positioning the workpiece, the four groups of pushing components are separated from the four clamping members respectively, and the first driving force exerted on the clamping member provided with a magnetic suction member is the elastic force provided by the elastic member and the magnetic attraction generated between the magnetic suction member and the magnetic member, and the clamping member without a magnetic suction member is not provided. The second driving force exerted on the clamping member is the elastic force provided by the elastic member, thereby utilizing the characteristics of the first driving force and the second driving force and the characteristics of the asymmetric distribution of several groups of magnetic components, so that the contraction speed of the clamping member provided with a magnetic attraction member in the two clamping assemblies arranged relatively in the same direction is greater than the contraction speed of the clamping member without a magnetic attraction member, so that the clamping member provided with a magnetic attraction member and the clamping member without a magnetic attraction member are contracted and clamped and positioned workpieces in turn, thereby realizing the function of stably positioning the workpiece on the carrier, avoiding the generation of an active gap between the clamping member and the side wall of the workpiece, and improving the positioning accuracy.

[0007] In some embodiments, the number of the magnetic components is two groups, the magnetic parts of the two groups of the magnetic components are respectively arranged on two adjacent side walls of the carrier along the first direction and the second direction, and the magnetic suction parts of the two groups of the magnetic components are respectively arranged on the clamping parts of the clamping components corresponding to the side walls.

[0008] In some embodiments, the positioning device further includes a driving source connected to the four groups of the pushing components respectively, and the driving source synchronously drives the four groups of the pushing components to push the corresponding clamping members.

[0009] In some embodiments, the driving source includes four gas passages respectively connected to external gas sources, the four gas passages are arranged on the supporting member and respectively correspond to the four groups of pushing components, each of the gas passages includes a receiving groove, a first air inlet groove and a second air inlet groove, the receiving groove is arranged along the movement direction of the pushing component, the first air inlet groove and the second air inlet groove are respectively connected to the two ends of the receiving groove and are both connected to the external gas source, the external gas source synchronously delivers gas to the corresponding receiving groove through the four first air inlet grooves or the four second air inlet grooves; each group of the pushing components includes a piston member and a pushing member, the piston member is airtightly abutted against the groove of the receiving groove The wall divides the storage groove into a first storage part and a second storage part, the first storage part and the second storage part are respectively connected to the first air inlet groove and the second air inlet groove, one end of the pushing member is connected to the piston member, and the other end of the pushing member is penetrated through the bottom of the storage groove adjacent to the second storage part; wherein, the first air inlet groove transports the gas provided by the external air source into the first storage part, so that the piston member drives the pushing member to extend under the action of the gas in the first storage part, and the second air inlet groove transports the gas provided by the external air source into the second storage part, so that the piston member drives the pushing member to retract under the action of the gas in the second storage part.

[0010] In some embodiments, each of the gas passages further includes a ventilation groove, which is disposed in the middle of the carrier and is respectively connected to the four first air inlet grooves and the external air source, and the ventilation groove is used to simultaneously transport the gas provided by the external air source to the four first air inlet grooves.

[0011] In some embodiments, the supporting member includes: a supporting portion, which is provided with four gas passages and is used to support the workpiece, and the side wall of the supporting portion corresponding to the magnetic attraction member is provided with the magnetic member; a covering portion, which covers the ventilation groove and is detachably connected to the supporting portion; wherein the clamping member is rotatably connected to the supporting portion, and the elastic members are respectively fixedly connected to the supporting portions.

[0012] In some embodiments, the supporting assembly also includes: a first air guide member and four second air guide members, the first air guide member is connected to the supporting member and communicated with the ventilation groove and the external air source, the four second air guide members are arranged at intervals and are respectively connected to the supporting member, the four second air guide members are respectively communicated with the corresponding second air inlet grooves and the external air source, and the first air guide member and the four second air guide members are used to introduce the gas provided by the external air source into the corresponding ventilation grooves and the second air inlet grooves.

[0013] In some embodiments, the supporting assembly also includes: a first sealing member, which is arranged around the ventilation groove and respectively abuts against the cover portion and the supporting portion; and four second sealing members, which are respectively arranged around the corresponding second air inlet grooves and respectively abut against the supporting portion and the second air guide member.

[0014] In some embodiments, the elastic member includes: a first fixing portion and a second fixing portion, which are respectively connected to the clamping member and the supporting member; an elastic portion, both ends of which are respectively connected to the first fixing portion and the second fixing portion, and the elastic portion is used to provide elastic force to drive the clamping member to contract.

[0015] In some embodiments, the clamping member includes: a connecting portion, both ends of which are respectively rotatably connected to the supporting member, and the magnetic member is provided on the side of the connecting portion facing the supporting member and connected to the elastic member; two clamping portions, which are arranged in parallel and protrude from the upper surface of the connecting portion, and the two clamping portions are used to abut against the side wall of the workpiece under the drive of the connecting portion to position the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of a positioning device and a workpiece adapted thereto provided in an embodiment of the present application.

[0017] Figure 2 for Figure 1 The shown schematic cross-sectional view of the positioning device and the workpiece along the II-II direction.

[0018] Figure 3 for Figure 1 The schematic diagram of the structural decomposition of the bearing assembly and the magnetic part is shown.

[0019] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the elastic member shown.

[0020] Main component symbols

[0021] Positioning device 100

[0022] Carrying assembly 10

[0023] Carrier 11

[0024] Gas passage 111

[0025] Storage slot 1111

[0026] The first air inlet groove 1112

[0027] Second air inlet groove 1113

[0028] First storage section 1114

[0029] Second storage section 1115

[0030] Ventilation slot 1116

[0031] Carrying portion 112

[0032] Covering part 113

[0033] Mounting slot 114

[0034] The first air guide 12

[0035] The second air guide 13

[0036] First seal 14

[0037] Second sealing member 15

[0038] Clamping assembly 20

[0039] Clamping piece 21

[0040] Connection part 211

[0041] Clamping portion 212

[0042] Curved surface 2121

[0043] Elastic member 22

[0044] The first fixing portion 221

[0045] The second fixing portion 222

[0046] Elastic portion 223

[0047] Magnetic assembly 30

[0048] Magnetic parts 31

[0049] Magnetic parts 32

[0050] Push assembly 40

[0051] Piston 41

[0052] Pusher 42

[0053] Workpiece 200 DETAILED DESCRIPTION

[0054] In order to more clearly understand the purpose, features and advantages of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the embodiments described are only a part of the embodiments of the present application, rather than all of the embodiments.

[0055] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0056] See also Figure 1 The present application provides a positioning device 100, which includes a bearing assembly 10, four groups of clamping assemblies 20, several groups of magnetic assemblies 30 and a pushing assembly 40. The positioning device 100 is used to position a workpiece 200. The workpiece 200 may be a mobile phone mid-plate, a mobile phone back plate, etc. It can be understood that Figure 1 A Cartesian three-dimensional coordinate system is established in the first direction. Figure 1 The X-axis direction shown is the direction in which one group of clamping assemblies 20 having the following magnetic attraction member 32 points to the direction of the clamping assembly 20 opposite thereto, and the second direction is Figure 1 The Y-axis direction is the direction in which another group of clamping components 20 having the magnetic attraction member 32 described below points to the clamping component 20 opposite thereto.

[0057] See also Figure 1 The bearing assembly 10 includes a bearing member 11, and the bearing member 11 is used to bear a workpiece 200. Two groups of clamping assemblies 20 are relatively arranged on both sides of the bearing member 11 along a first direction, and the other two groups of clamping assemblies 20 are relatively arranged on the other two sides of the bearing member 11 along a second direction. Each group of clamping assemblies 20 includes a clamping member 21 and an elastic member 22. The clamping member 21 is rotatably connected to the bearing member 11, and the two ends of the elastic member 22 are respectively connected to the clamping member 21 and the bearing member 11. The elastic member 22 is used to make the clamping member 21 contract toward the bearing member 11 and clamp the workpiece 200. Several groups of magnetic components 30 are asymmetrically distributed along the first direction and / or the second direction for cooperating with the elastic member 22 to make the contraction speeds of two groups of clamping components 20 arranged opposite to each other in the same direction different. Each group of magnetic components 30 includes a matching magnetic member 31 and a magnetic attraction member 32. The magnetic member 31 is arranged on the side wall of the carrier 11, and the magnetic attraction member 32 is arranged on the clamping member 21 of the clamping component 20 corresponding to the side wall. Four groups of pushing components 40 are respectively arranged in one-to-one correspondence with the four groups of clamping components 20 and are all movably penetrated in the carrier 11 for pushing the clamping member 21 to release the workpiece 200. In this embodiment, the magnetic member 31 and the magnetic attraction member 32 can be magnet sheets.

[0058] When the positioning device 100 is used, when receiving the workpiece 200 to be positioned or loosening the positioned workpiece 200, the four clamping members 21 are respectively opened synchronously and the corresponding elastic members 22 are stretched under the push of the corresponding pushing components 40, so that the workpiece 200 is stably placed on the carrier 11 or the workpiece 200 is stably removed from the carrier 11, avoiding interference between the workpiece 200 and the clamping members 21 and the clamping members 21, thereby improving the quality of the workpiece 200; when positioning the workpiece 200, the four groups of pushing components 40 are separated from the four clamping members 21 respectively, and the first driving force exerted on the clamping member 21 provided with the magnetic suction member 32 is the elastic force provided by the elastic member 22 and the magnetic suction force generated between the magnetic suction member 32 and the magnetic member 31. The second driving force exerted on the clamping member 21 without the magnetic member 32 is the elastic force provided by the elastic member 22. By utilizing the characteristics of the first driving force and the second driving force and the asymmetric distribution characteristics of the plurality of groups of magnetic components 30, the contraction speed of the clamping member 21 with the magnetic member 32 in the two clamping components 20 arranged opposite to each other in the same direction is greater than the contraction speed of the clamping member 21 without the magnetic member 32. As a result, the clamping member 21 with the magnetic member 32 and the clamping member 21 without the magnetic member 32 are contracted and clamped to position the workpiece 200 in sequence, thereby realizing the function of stably positioning the workpiece 200 on the carrier 11, avoiding the generation of an active gap between the clamping member 21 and the side wall of the workpiece 200, and improving the positioning accuracy.

[0059] It can be understood that the above-mentioned asymmetric distribution means that the clamping members 21 in the two groups of clamping members 20 arranged opposite to each other in the same direction are not provided with magnetic suction members 32 at the same time, that is, the contraction speeds of the two groups of clamping members 20 arranged opposite to each other in the same direction are different.

[0060] In this embodiment, there are two groups of magnetic components 30, and the magnetic components 31 of the two groups of magnetic components 30 are respectively arranged on two adjacent side walls of the carrier 11 along the first direction and the second direction, and the magnetic suction components 32 of the two groups of magnetic components 30 are respectively arranged on the clamping components 21 of the clamping components 20 corresponding to the side walls. In this way, the two groups of magnetic components 30 can be distributed asymmetrically, so that the contraction speeds of the two clamping components 21 arranged opposite to each other in the same direction are different, so that the two clamping components 21 can be contracted successively and stably clamp the workpiece 200.

[0061] In some embodiments, the positioning device 100 further includes a driving source (not shown) connected to the four groups of pushing components 40 respectively, and the driving source synchronously drives the four groups of pushing components 40 to push the corresponding clamping members 21 .

[0062] In this way, by setting the driving sources to be connected to the four groups of pushing components 40, the driving source can be used as a single driving source to drive the four groups of pushing components 40 to synchronously push the four clamping members 21 to open to release the workpiece 200, thereby preventing the four groups of driving sources from driving the four groups of pushing components 40 to move respectively and generating driving forces with a sequence deviation so as to make the opening speeds of the four clamping members 21 different. In this way, the clamped workpiece 200 is prevented from being pushed by the clamping members 21 that are released later and moving on the carrier 11 and being damaged, which is beneficial to ensuring the quality of the workpiece 200 and improving the positioning stability of the positioning device 100.

[0063] See also Figure 2 In some embodiments, the driving source includes four gas passages 111 respectively connected to external gas sources. The four gas passages 111 are arranged on the carrier 11 and respectively correspond to the four groups of pushing components 40. Each gas passage 111 includes a storage groove 1111, a first air inlet groove 1112 and a second air inlet groove 1113. The storage groove 1111 is arranged along the movement direction of the pushing component 40. The first air inlet groove 1112 and the second air inlet groove 1113 are respectively connected to both ends of the storage groove 1111 and are both connected to the external gas source. The external gas source synchronously delivers gas to the corresponding storage groove 1111 through the four first air inlet grooves 1112 or the four second air inlet grooves 1113. Each group of pushing components 40 includes a piston member 41 and a pushing member 42. The piston member 41 is airtightly abutted against the groove wall of the receiving groove 1111 and divides the receiving groove 1111 into a first receiving portion 1114 and a second receiving portion 1115. The first receiving portion 1114 and the second receiving portion 1115 are respectively connected to the first air inlet groove 1112 and the second air inlet groove 1113. One end of the pushing member 42 is connected to the piston member 41, and the other end of the pushing member 42 is penetrated through the groove bottom of the receiving groove 1111 adjacent to the second receiving portion 1115. The first air inlet groove 1112 delivers gas provided by an external gas source into the first receiving portion 1114, so that the piston member 41 drives the pushing member 42 to extend under the action of the gas in the first receiving portion 1114, and the second air inlet groove 1113 delivers gas into the second receiving portion 1115, so that the piston member 41 drives the pushing member 42 to retract under the action of the gas in the second receiving portion 1115.

[0064] In this way, the four first air inlet grooves 1112 and the four second air inlet grooves 1113 are connected to the external air source, so that the external air source can synchronously deliver gas to the storage groove 1111 through the four first air inlet grooves 1112 or the four second air inlet grooves 1113, so that the four-way gas passage 111 connected to the external air source constitutes a single driving source driven by gas, so that the external air source drives the four groups of pushing components 40 to move synchronously through the four-way gas passage 111, thereby improving the clamping positioning accuracy, avoiding occupying too large an installation space, and simplifying the structure of the positioning device 100. In addition, by setting the specific structure of the above-mentioned gas passage 111 and the pushing component 40, the piston member 41 can separate the receiving groove 1111 into a first receiving portion 1114 and a second receiving portion 1115. When the positioning device 100 receives the workpiece 200 to be positioned or loosens the positioned workpiece 200, the first air inlet groove 1112 transports gas to the first receiving portion 1114, so that the piston member 41 drives the pushing member 42 to extend and push the corresponding clamping member 21 to open under the action of the gas in the first receiving portion 1114, thereby realizing the function of the pushing component 40 to push the clamping member 21 to open; when the positioning device 100 positions the workpiece 200, the second air inlet groove 1113 transports gas to the second receiving portion 1115, so that the piston member 41 drives the pushing member 42 to retract and disengage from the corresponding clamping member 21 under the action of the gas in the second receiving portion 1115, thereby avoiding interference between the clamping member 21 and the pushing component 40 when it shrinks.

[0065] Please continue reading Figure 2 In some embodiments, each gas passage 111 also includes a ventilation groove 1116, which is disposed in the middle of the carrier 11 and is respectively connected to the four first air inlet grooves 1112 and an external air source, and the ventilation groove 1116 is used to simultaneously transport the gas provided by the external air source to the four first air inlet grooves 1112.

[0066] In this way, by setting the above-mentioned ventilation groove 1116, the ventilation groove 1116 can simultaneously transport the gas provided by the external gas source to the four first air inlet grooves 1112, without setting too many air inlet channels in the carrier 11, thereby simplifying the structure of the carrier 11 and improving the air intake efficiency of the carrier 11.

[0067] See also Figure 3 In some embodiments, the carrier 11 includes a carrier portion 112 and a cover portion 113. The carrier portion 112 is provided with four gas passages 111 and is used to carry the workpiece 200, and a magnetic member 31 is provided on the side wall of the carrier portion 112 corresponding to the magnetic member 32. The cover portion 113 covers the venting groove 1116 and is detachably connected to the carrier portion 112. The clamping member 21 is rotatably connected to the carrier portion 112, and the elastic member 22 is fixedly connected to the carrier portion 112.

[0068] In this way, by setting the specific structure of the above-mentioned supporting member 11, a split structure can be formed between the supporting part 112 and the covering part 113, which is convenient for the disassembly and assembly and maintenance operations between the supporting component 10 and the pushing component 40. At the same time, the covering part 113 can also maintain the sealed environment of the ventilation groove 1116 to avoid gas leakage when the gas flows through the ventilation groove 1116.

[0069] In some embodiments, the supporting assembly 10 also includes a first air guide member 12 and four second air guide members 13. The first air guide member 12 is connected to the supporting member 11 and communicates with the ventilation groove 1116 and an external air source. The four second air guide members 13 are arranged at intervals and are respectively connected to the supporting member 11. The four second air guide members 13 are respectively communicated with the corresponding second air inlet grooves 1113 and the external air source. The first air guide member 12 and the four second air guide members 13 are used to introduce the gas provided by the external air source into the corresponding ventilation grooves 1116 and the second air inlet grooves 1113.

[0070] In this way, by providing the above-mentioned first air guide member 12 and four second air guide members 13, the first air guide member 12 and the four second air guide members 13 can respectively guide the gas provided by the external gas source into the corresponding ventilation groove 1116 and the second air inlet groove 1113, so that the gas is stably transported to the corresponding first storage portion 1114 or the second storage portion 1115, thereby improving the gas transportation stability.

[0071] See also Figure 2 and Figure 3 In some embodiments, the bearing assembly 10 further includes a first seal 14 and a second seal 15. The first seal 14 is disposed around the vent groove 1116 and abuts against the cover portion 113 and the bearing portion 112 respectively. The four second seals 15 are disposed around the corresponding second air inlet grooves 1113 and abut against the bearing portion 112 and the second air guide 13 respectively. In this embodiment, the first seal 14 and the second seal 15 may be sealing rings.

[0072] In this way, by setting the above-mentioned first seal 14 and second seal 15, the sealed environment of the ventilation groove 1116 and the second air inlet groove 1113 can be maintained respectively, avoiding the gas from overflowing from the connection between the corresponding air guide member and the supporting member 11 during the process of gas being transported to the ventilation groove 1116 and the second air inlet groove 1113, thereby further improving the gas transportation stability.

[0073] See also Figure 1 and Figure 4In some embodiments, the elastic member 22 includes a first fixing portion 221, a second fixing portion 222 and an elastic portion 223. The first fixing portion 221 and the second fixing portion 222 are connected to the clamping member 21 and the carrier 11, respectively. Both ends of the elastic portion 223 are connected to the first fixing portion 221 and the second fixing portion 222, respectively, and the elastic portion 223 is used to provide elastic force to drive the clamping member 21 to contract. In this embodiment, the elastic portion 223 can be a tension spring.

[0074] Thus, by setting the specific structure of the elastic member 22, the first fixing portion 221 and the second fixing portion 222 can fix the opposite ends of the elastic portion 223 to the clamping member 21 and the supporting member 11 respectively, so that the elastic portion 223 can stably provide elastic force.

[0075] See also Figure 1 In some embodiments, the carrier 11 is provided with a mounting groove 114, which is arranged along the extension direction of the elastic portion 223 and the bottom of the mounting groove 114 is connected to the second fixing portion 222, and the mounting groove 114 is used to receive and limit the elastic portion 223. It can be understood that the number of the mounting grooves 114 is four, and the four mounting grooves 114 receive four elastic portions 223 respectively.

[0076] Since the elastic portion 223 may bend during the stretching or resetting process, by providing a mounting groove 114 to accommodate and limit the elastic portion 223, the elastic portion 223 can always be stretched or reset along the extension direction of the mounting groove 114, preventing the elastic portion 223 from loosening from the first fixing portion 221 and the second fixing portion 222 when being bent and deformed, thereby improving the stability of the elastic force provided by the elastic portion 223.

[0077] Please continue reading Figure 1 In some embodiments, the clamping member 21 includes a connecting portion 211 and two clamping portions 212. Both ends of the connecting portion 211 are rotatably connected to the supporting member 11, and a magnetic member 32 is provided on the side of the connecting portion 211 facing the supporting member 11 and connected to the elastic member 22. The two clamping portions 212 are arranged in parallel and protrude from the upper surface of the connecting portion 211, and the two clamping portions 212 are used to abut against the side wall of the workpiece 200 driven by the connecting portion 211 to position the workpiece 200.

[0078] Thus, by setting the specific structure of the clamping member 21, the two clamping parts 212 can be driven by the connecting part 211 to abut against different positions of the side wall of the workpiece 200, thereby increasing the contact area between the clamping member 21 and the workpiece 200, and further enabling the clamping member 21 to stably position the workpiece 200.

[0079] In some embodiments, a side of the clamping portion 212 facing the carrier 11 is provided with an arc-shaped surface 2121 .

[0080] Thus, by providing the arc surface 2121 , the clamping portion 212 can contact the side wall of the workpiece 200 through the arc surface 2121 , thereby reducing the friction between the clamping portion 212 and the workpiece 200 when positioning the workpiece 200 , thereby reducing damage to the workpiece 200 and improving the quality of the workpiece 200 .

[0081] The working process of the positioning device 100 is roughly as follows:

[0082] First, the first air guide 12 guides the gas provided by the external gas source into the ventilation groove 1116, and the gas is synchronously transported to the corresponding first receiving portion 1114 through the ventilation groove 1116 and the four first air inlet grooves 1112 in sequence, so that the four piston members 41 synchronously drive the corresponding push members 42 to extend under the action of the gas in the corresponding first receiving portion 1114, so that the four push members 42 respectively push the corresponding clamping members 21, and the four clamping members 21 are synchronously opened and stretch the corresponding elastic members 22 respectively, so as to avoid interference between the workpiece 200 and the clamping member 21 during the placement process, thereby improving the quality of the workpiece 200, and then the workpiece 200 is placed on the carrier 11, and the carrier 11 receives and carries the workpiece 200;

[0083] Then, the four second air guides 13 synchronously guide the gas provided by the external air source into the corresponding second air inlet grooves 1113, and the gas is transported to the corresponding second receiving parts 1115 through the four second air inlet grooves 1113, so that the four piston members 41 drive the corresponding pushing members 42 to retract synchronously under the action of the gas in the corresponding second receiving parts 1115, so that the four pushing members 42 loosen the corresponding clamping members 21, and the first driving force exerted on the clamping member 21 provided with the magnetic suction member 32 is the elastic force provided by the elastic member 22 and the magnetic suction force generated between the magnetic suction member 32 and the magnetic member 31, and the second driving force exerted on the clamping member 21 without the magnetic suction member 32 is the elastic force provided by the elastic member 22 and the magnetic suction force generated between the magnetic suction member 32 and the magnetic member 31. The elastic force provided by the elastic member 22 utilizes the characteristics of the first driving force and the second driving force and the characteristics of the asymmetric distribution of the plurality of groups of magnetic components 30, so that the contraction speed of the clamping member 21 provided with the magnetic member 32 in the two clamping components 20 arranged opposite to each other in the same direction is greater than the contraction speed of the clamping member 21 not provided with the magnetic member 32, so that the clamping member 21 provided with the magnetic member 32 and the clamping member 21 not provided with the magnetic member 32 are successively contracted and clamped and positioned the workpiece 200, so as to realize the function of stably positioning the workpiece 200 on the carrier 11, avoid the generation of an active gap between the clamping member 21 and the side wall of the workpiece 200, and improve the positioning accuracy;

[0084] Finally, the first air guide member 12 guides the gas provided by the external air source into the ventilation groove 1116, and the gas is synchronously transported to the corresponding first storage portion 1114 through the ventilation groove 1116 and the four first air inlet grooves 1112 in turn, so that the four piston members 41 drive the corresponding pushing members 42 to extend under the action of the gas in the corresponding first storage portion 1114, so that the four pushing members 42 respectively push the corresponding clamping members 21, and the four clamping members 21 open synchronously and stretch the corresponding elastic members 22 respectively, which makes it convenient for the robot arm or the operator to remove the workpiece 200 from the carrier 11, avoids interference between the workpiece 200 and the clamping member 21 during the removal process, and further improves the quality of the workpiece 200.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A positioning device for positioning a workpiece, characterized in that: include: A bearing assembly, comprising a bearing member, wherein the bearing member is used to bear the workpiece; Four groups of clamping assemblies, wherein two groups of the clamping assemblies are relatively arranged on two sides of the carrier along a first direction, and the other two groups of the clamping assemblies are relatively arranged on the other two sides of the carrier along a second direction perpendicular to the first direction, each group of the clamping assemblies comprises a clamping member and an elastic member, the clamping member is rotatably connected to the carrier, and two ends of the elastic member are respectively connected to the clamping member and the carrier to make the clamping member contract toward the carrier and clamp the workpiece; A plurality of groups of magnetic components are asymmetrically distributed along the first direction and / or the second direction and are used to cooperate with the elastic member to make the contraction speeds of two groups of the clamping components arranged opposite to each other in the same direction different. Each group of the magnetic components includes a matching magnetic member and a magnetic attraction member. The magnetic member is arranged on the side wall of the bearing member, and the magnetic attraction member is arranged on the clamping member of the clamping assembly corresponding to the side wall. Four groups of pushing components are respectively arranged in one-to-one correspondence with the four groups of clamping components and are movably penetrated through the bearing member to push the clamping member to release the workpiece.

2. The positioning device according to claim 1, characterized in that There are two groups of magnetic components, and the magnetic parts of the two groups of magnetic components are respectively arranged on two adjacent side walls of the carrier along the first direction and the second direction, and the magnetic suction parts of the two groups of magnetic components are respectively arranged on the clamping parts of the clamping components corresponding to the side walls.

3. The positioning device according to claim 1, characterized in that: The positioning device further comprises a driving source connected to the four groups of the pushing components respectively, and the driving source synchronously drives the four groups of the pushing components to push the corresponding clamping members.

4. The positioning device according to claim 3, characterized in that: The driving source includes four gas passages respectively connected to the external gas source, the four gas passages are arranged on the bearing member and respectively correspond to the four groups of the pushing components, each of the gas passages includes a receiving groove, a first air inlet groove and a second air inlet groove, the receiving groove is arranged along the movement direction of the pushing component, the first air inlet groove and the second air inlet groove are respectively connected to the two ends of the receiving groove and are both connected to the external gas source, and the external gas source synchronously delivers gas to the corresponding receiving groove through the four first air inlet grooves or the four second air inlet grooves; Each group of the pushing components includes a piston member and a pushing member, wherein the piston member is in airtight contact with the groove wall of the receiving groove and divides the receiving groove into a first receiving portion and a second receiving portion, wherein the first receiving portion and the second receiving portion are respectively connected to the first air inlet groove and the second air inlet groove, one end of the pushing member is connected to the piston member, and the other end of the pushing member is inserted through the groove bottom of the receiving groove adjacent to the second receiving portion; Among them, the first air inlet groove transports the gas provided by the external air source into the first storage part, so that the piston member drives the pushing member to extend under the action of the gas in the first storage part, and the second air inlet groove transports the gas provided by the external air source into the second storage part, so that the piston member drives the pushing member to retract under the action of the gas in the second storage part.

5. The positioning device according to claim 4, characterized in that: Each of the gas passages also includes a ventilation groove, which is arranged in the middle of the carrier and is respectively connected to the four first air inlet grooves and the external air source, and the ventilation groove is used to simultaneously transport the gas provided by the external air source to the four first air inlet grooves.

6. The positioning device according to claim 5, characterized in that: The bearing member comprises: A bearing part, provided with four gas passages and used for bearing the workpiece, and the side wall of the bearing part corresponding to the magnetic attraction part is provided with the magnetic part; A covering portion, covering the venting groove and detachably connected to the bearing portion; Wherein, the clamping member is rotatably connected to the bearing portion, and the elastic members are respectively fixedly connected to the bearing portions.

7. The positioning device according to claim 6, characterized in that: The bearing assembly further comprises: A first air guide member and four second air guide members, the first air guide member is connected to the supporting member and communicated with the ventilation groove and the external air source, four second air guide members are arranged at intervals and are respectively connected to the supporting member, the four second air guide members are respectively communicated with the corresponding second air inlet grooves and the external air source, the first air guide member and the four second air guide members are used to introduce the gas provided by the external air source into the corresponding ventilation grooves and the second air inlet grooves.

8. The positioning device according to claim 7, characterized in that: The bearing assembly further comprises: A first sealing member, arranged around the vent groove and respectively abutting against the cover portion and the bearing portion; Four second sealing members are respectively arranged around the corresponding second air inlet grooves and respectively abut against the bearing portion and the second air guide member.

9. The positioning device according to claim 1, characterized in that: The elastic member comprises: A first fixing portion and a second fixing portion are connected to the clamping member and the bearing member respectively; An elastic part, two ends of which are respectively connected to the first fixing part and the second fixing part, and the elastic part is used to provide elastic force to drive the clamping member to contract.

10. The positioning device according to claim 1, characterized in that: The clamping member comprises: A connecting part, both ends of which are rotatably connected to the supporting member, and a side of the connecting part facing the supporting member is provided with the magnetic attraction member and connected to the elastic member; Two clamping parts are arranged in parallel and protrude from the upper surface of the connecting part. The two clamping parts are used to abut against the side wall of the workpiece under the drive of the connecting part to position the workpiece.

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