Positioning mechanism

Abstract

The invention relates to the technical field of workpiece positioning, in particular to a positioning mechanism which is used for positioning a workpiece and comprises a bearing part, two first positioning parts, at least two second positioning parts, a movable assembly and a driving assembly, the peripheral side of the bearing part is sleeved with a workpiece, the two first positioning parts are oppositely arranged in the first direction, the at least two second positioning parts are located between the two first positioning parts side by side, and the at least two second positioning parts and the two first positioning parts are arranged at intervals in the second direction perpendicular to the first direction. One end of the movable assembly is movably connected with the at least two second positioning pieces, the driving assembly is located between the two first positioning pieces, and the different sides of the driving assembly abut against the ends, close to each other, of the two first positioning pieces and the ends, away from the second positioning pieces, of the movable assembly respectively. The second positioning piece in the positioning mechanism can move by a corresponding distance in the second direction according to the thickness of the second inner side wall and can abut against workpieces with the inner side walls different in thickness.

Description

Technical Field

[0001] The present application relates to the technical field of workpiece positioning, and in particular to a positioning mechanism. Background Art

[0002] At present, for some processing of box-shaped workpieces, it is necessary to first position them with internal support, and then turn and mill the shape of the box-shaped workpiece. Now, a push block is usually pushed by a cylinder to hold the inner wall of the boxed workpiece. However, this method is only applicable to box-shaped workpieces with uniform inner wall thickness, and cannot be applied to box-shaped workpieces with different inner wall thickness. Summary of the invention

[0003] In view of the above, it is necessary to propose a positioning mechanism to position workpieces with different inner wall thicknesses.

[0004] The embodiment of the present application provides a positioning mechanism for positioning a workpiece, wherein the workpiece has two opposite first inner side walls and a second inner side wall arranged between the two first inner side walls, comprises a bearing member and two first positioning members respectively arranged on the bearing member, at least two second positioning members, a movable component, and a driving component; the peripheral side of the bearing member is sleeved by the workpiece, the two first positioning members are arranged opposite to each other along a first direction, at least two second positioning members are arranged side by side between the two first positioning members, and at least two second positioning members are spaced apart from the two first positioning members along a second direction perpendicular to the first direction, and one end of the movable component is respectively connected to at least two of the first positioning members. The second positioning member is movably connected, and the driving component is located between the two first positioning members, and different sides of the driving component are respectively abutted against one end of the two first positioning members that are close to each other and one end of the movable component that is away from the second positioning member; wherein, the driving component can push the two first positioning members to move away from each other along the first direction so that the two first positioning members respectively abut against the two first inner side walls, and when the first positioning members abut against the first inner side wall, the movable component is pushed to drive at least two second positioning members to move a corresponding distance along the second direction according to the thickness of the second inner side wall, so that at least two second positioning members abut against the second inner side wall.

[0005] In some embodiments, the carrier includes: a supporting portion, a side of which is provided with a receiving groove, wherein the second positioning member and the movable component are both disposed in the receiving groove; and a covering portion, which is disposed on one side of the supporting portion and covers the receiving groove.

[0006] In some embodiments, each of the first positioning members includes: a moving part, which is arranged in the supporting part and slides along the first direction, and a first inclined surface is provided at one end of the moving part close to the driving component, and the first inclined surface abuts against the driving component; an abutting part, one end of which is connected to an end of the moving part away from the driving component, and the other end of the abutting part extends back to the moving part, and corresponding side edges of the supporting part and the covering part are provided with avoidance grooves, and the abutting part is arranged in the avoidance groove and can be moved out of the avoidance groove to abut against the first inner wall.

[0007] In some embodiments, each of the second positioning members includes: a sliding portion, which is disposed in the supporting portion and slides along the second direction, one end of the sliding portion being movably connected to one end of the movable component; and a supporting portion, which is disposed on a side of the sliding portion away from the movable component to abut against the second inner wall.

[0008] In some embodiments, the movable component includes: a pushing member, one end of which abuts against the driving component; at least two pull rods, arranged between the pushing member and the sliding portion, one end of each of the pull rods being rotatably connected to the pushing member, and the other end of each of the pull rods being rotatably connected to the corresponding sliding portion; a first elastic member, arranged between the pushing member and the sliding portion, one end of the first elastic member abuts against the pushing member, and the other end of the first elastic member abuts against the supporting portion, so as to reset the pushing member.

[0009] In some embodiments, the pushing member includes: a pushing portion, which is arranged between the driving assembly and the pulling rod, and a second inclined surface is provided at one end of the pushing portion close to the driving assembly, and the second inclined surface abuts against the driving assembly; a connecting rod, which is arranged between the pushing portion and the pulling rod, and a side of the connecting rod away from the pushing portion is rotatably connected to one end of at least two pulling rods away from the corresponding sliding portion; a movable rod, one end of the movable rod is fixedly connected to the connecting rod, and one end of the movable rod away from the connecting rod is movably connected to the pushing portion.

[0010] In some embodiments, the movable component further includes: two limiting members, which are arranged on opposite sides of the pushing portion and the connecting rod, wherein one of the limiting members is connected to the sealing portion, and the other limiting member is connected to the bottom of the accommodating groove.

[0011] In some embodiments, a movable groove connected to the accommodating groove and a first blowing hole connected to the movable groove are opened in the support portion, and the driving assembly includes: a push member, which is slidably arranged in the movable groove and abuts against the first positioning member and the movable assembly respectively; a sealing member, which is slidably and sealingly arranged in the movable groove, and the sealing member and the push member are arranged opposite to each other and movably connected; a second elastic member, which is arranged between the push member and the sealing member and abuts against the push member and the sealing member respectively; wherein, blowing air into the movable groove through the first blowing hole can cause the sealing member to drive the second elastic member and the push member to move, so that the pushing member pushes the first positioning member and the movable assembly to move in turn.

[0012] In some embodiments, the positioning mechanism also includes: an adsorption component, which is arranged in the supporting part, a first air suction hole is opened in the adsorption component, a second air suction hole is opened in the covering part, one end of the second air suction hole is connected to the first air suction hole, and one end of the second air suction hole away from the first air suction hole passes through the side of the covering part away from the supporting part to adsorb the workpiece.

[0013] In some embodiments, the adsorption member is located in the movable groove and penetrates the sealing member and the pushing member, the supporting member also includes a connecting portion, the connecting portion is arranged on the side of the supporting portion away from the sealing portion and is arranged corresponding to the adsorption member, a third air suction hole and a second air blowing hole are opened in the connecting portion, one end of the third air suction hole is connected to the first air suction hole, and the end of the third air suction hole away from the first air suction hole is connected to the outside world, one end of the second air blowing hole is connected to the first air blowing hole, and the end of the second air blowing hole away from the first air blowing hole is connected to the outside world.

[0014] The above-mentioned positioning mechanism first pushes the two first positioning members to move in opposite directions along the first direction through the driving component, so that the two first positioning members respectively abut against the two first inner walls, and then the driving component pushes the movable component to drive at least two second positioning members to move along the second direction, so that the at least two second positioning members abut against the second inner wall. Since the at least two second positioning members can move a corresponding distance along the second direction according to the thickness of the second inner wall, the at least two second positioning members can abut against workpieces with different inner wall thicknesses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the positioning mechanism provided in the embodiment of the present application.

[0016] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the positioning mechanism shown.

[0017] Figure 3 yes Figure 1 The shown schematic cross-sectional view of the positioning mechanism along the AA direction.

[0018] Figure 4 yes Figure 1 The cross-sectional schematic diagram of the positioning mechanism shown is along the BB direction. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0020] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] See also Figure 1 The present application provides a positioning mechanism 100 for positioning a workpiece (not shown). The workpiece is box-shaped and has two opposite first inner side walls, a second inner side wall disposed between the two first inner side walls, and a third inner side wall disposed between the two first inner side walls. The first inner side walls have a uniform thickness, and the thickness of the second inner side wall at different positions may be the same or different. The thickness of the third inner side wall is uniform and is opposite to the second inner side wall. Please refer to Figure 2The positioning mechanism 100 includes a carrier 10, two first positioning members 20, two second positioning members 30, a movable assembly 40 and a driving assembly 50. It can be understood that in other embodiments, the number of the second positioning members 30 can also be three or four, but is not limited thereto.

[0024] Two first positioning members 20, two second positioning members 30, a movable assembly 40 and a driving assembly 50 are respectively arranged on the carrier 10, and the peripheral side of the carrier 10 is sleeved by the workpiece. The two first positioning members 20 are arranged opposite to each other along the first direction; the two second positioning members 30 are arranged side by side between the two first positioning members 20, and the two second positioning members 30 and the two first positioning members 20 are arranged at intervals along the second direction perpendicular to the first direction, wherein the first direction is the X-axis direction and the second direction is the Y-axis direction; one end of the movable assembly 40 is movably connected to the two second positioning members 30; the driving assembly 50 is located between the two first positioning members 20, and different sides of the driving assembly 50 are respectively abutted against the ends of the two first positioning members 20 that are close to each other and the end of the movable assembly 40 that is away from the second positioning member 30. The driving assembly 50 can push the two first positioning members 20 to move in opposite directions along the first direction so that the two first positioning members 20 respectively abut against the two first inner side walls, and when the first positioning members 20 abut against the first inner side walls, the movable assembly 40 can push the two second positioning members 30 to move a corresponding distance along the second direction according to the thickness of the second inner side walls so that the two second positioning members 30 abut against the second inner side walls. It can be understood that the third inner side wall is abutted by the corresponding side surface of the carrier 10.

[0025] The movable component 40 pushes the two second positioning members 30 to move a corresponding distance along the second direction according to the thickness of the second inner wall. It can be understood that the thickness of the positions of the second inner wall corresponding to the two second positioning members 30 are different. When the movable component 40 pushes one of the second positioning members 30 to abut the position of the second inner wall with a thicker thickness, the second positioning member 30 will stop moving, and then the movable component 40 pushes the other second positioning member 30 to move until the other second positioning member 30 abuts the position of the second inner wall with a thinner thickness.

[0026] The carrier 10 includes a support portion 11 and a cover portion 12. The support portion 11 is a T-shaped structure. A receiving groove 111 is provided on one side of the support portion 11, wherein the second positioning member 30 and the movable assembly 40 are both arranged in the receiving groove 111; the cover portion 12 is arranged on one side of the support portion 11 and covers the receiving groove 111. The receiving groove 111 includes two first grooves 111A corresponding to the two second positioning members 30 respectively, and a limiting block 114 is provided on the two opposite side walls of each first groove 111A, and a slideway 114A is formed between the two limiting blocks 114, and each second positioning member 30 is slidably arranged in the corresponding slideway 114A. The receiving groove 111 also includes a second groove 111B respectively connected to the two first grooves 111A, and the movable assembly 40 is arranged in the second groove 111B.

[0027] Please also see Figure 3 and Figure 4 Each first positioning member 20 includes a moving portion 21 and a contact portion 22. The moving portion 21 is in the shape of a strip. The moving portion 21 is arranged in the support portion 11 and slides along the first direction. The end of the moving portion 21 close to the driving assembly 50 is provided with a first inclined surface 211, and the first inclined surface 211 contacts the driving assembly 50. The contact portion 22 is in the shape of a strip. One end of the contact portion 22 is vertically connected to the upper side of the end of the moving portion 21 away from the driving assembly 50, and the other end of the contact portion 22 extends away from the moving portion 21. The corresponding sides of the support portion 11 and the cover portion 12 are provided with a avoidance groove 112. The contact portion 22 is arranged in the avoidance groove 112 and can be moved out of the avoidance groove 112 to contact the first inner side wall. In this way, the driving assembly 50 can push the moving portions 21 of the two first positioning members 20 to move in opposite directions along the first direction, so that the contact portions 22 of the two first positioning members 20 move out of the avoidance groove 112 and contact the two first inner side walls respectively.

[0028] Each second positioning member 30 includes a sliding portion 31 and a supporting portion 32. The sliding portion 31 is block-shaped, disposed in the support portion 11 and sliding along the second direction, and one end of the sliding portion 31 is movably connected to one end of the movable component 40; the supporting portion 32 is sheet-shaped, disposed on a side of the sliding portion 31 away from the movable component 40, and connected to the upper end of the sliding portion 31 to abut against the second inner side wall. In this way, the movable component 40 drives the sliding portions 31 of the two second positioning members 30 to move a corresponding distance along the second direction according to the thickness of the second inner side wall, so that the supporting portions 32 of the two second positioning members 30 abut against the second inner side wall.

[0029] The movable component 40 includes a pushing member 41, two pull rods 42 and a first elastic member 43. One end of the pushing member 41 abuts against the driving component 50; the two pull rods 42 are arranged between the pushing member 41 and the sliding portion 31, one end of each pull rod 42 is rotatably connected to the pushing member 41, and the other end of each pull rod 42 is rotatably connected to the corresponding sliding portion 31; the first elastic member 43 is arranged between the pushing member 41 and the sliding portion 31, one end of the first elastic member 43 abuts against the pushing member 41, and the other end of the first elastic member 43 abuts against the supporting portion 11, so as to reset the pushing member 41.

[0030] Among them, the support part 11 includes a support body 101 and a support block 102 arranged on the support body 101, the second groove 111B is opened on the support body 101, and the two first grooves 111A are opened between the support body 101 and the support block 102. One end of the first elastic member 43 abuts against the pushing member 41, and the other end of the first elastic member 43 abuts against the inside of the support block 102.

[0031] In this way, the pusher 41 pushes the two pull rods 42 to respectively drive the two sliding parts 31 to slide, and since the pull rods 42 are movable, the sliding parts 31 can move a corresponding distance along the second direction according to the thickness of the second inner wall. Specifically, the first elastic member 43 is two springs arranged side by side.

[0032] It can be understood that the number of the pull rods 42 may also be three or four, but is not limited thereto.

[0033] It can be understood that the connection method of the rotational connection can be that the end of the pull rod 42 is a spherical structure, the sliding part 31 is concavely provided with a concave hole, and the spherical structure is rotatably arranged in the concave hole, or the end of the pull rod 42 is rotatably connected to the sliding part 31 through a rotating shaft.

[0034] The pusher 41 includes a pusher portion 411, a connecting rod 412 and a movable rod 413. The pusher portion 411 is disposed between the driving assembly 50 and the pull rod 42. The pusher portion 411 is in the shape of a triangular pyramid. The end of the pusher portion 411 close to the driving assembly 50 is provided with a second inclined surface 411A, and the second inclined surface 411A abuts against the driving assembly 50. The connecting rod 412 is disposed between the pusher portion 411 and the pull rod 42. The side of the connecting rod 412 away from the pusher portion 411 is rotatably connected to the ends of the two pull rods 42 away from the corresponding sliding portions 31. One end of the movable rod 413 is fixedly connected to the middle part of the connecting rod 412, and the end of the movable rod 413 away from the connecting rod 412 is movably connected to the middle part of the pushing portion 411. In this way, by providing the movable rod 413, the connecting rod 412 can be movably connected to the pushing portion 411, which is conducive to the sliding portion 31 moving a corresponding distance along the second direction according to the thickness of the second inner side wall.

[0035] The movable assembly 40 further includes two stoppers 44, each of which is plate-shaped, and the two stoppers 44 are disposed on opposite sides of the push portion 411 and the connecting rod 412, wherein a portion of one stopper 44 is connected to the inside of the cover portion 12, and the other stopper 44 is connected to the bottom of the receiving groove 111. In this way, by providing the stoppers 44, the moving directions of the push portion 411 and the connecting rod 412 can be limited, and the push portion 411 and the connecting rod 412 can be prevented from shaking in the direction perpendicular to the two stoppers 44.

[0036] The support portion 11 is provided with an active groove 113 connected to the accommodating groove 111 and a first blowing hole 115 connected to the active groove 113. The first blowing hole 115 is arranged on the side of the support portion 11 away from the sealing portion 12. The driving assembly 50 includes a push member 51, a sealing member 52 and a second elastic member 53. The push member 51 is slidably arranged in the active groove 113 and abuts against the first positioning member 20 and the movable assembly 40 respectively; the sealing member 52 is slidably and is sealed in the active groove 113 through a sealing ring, and the sealing member 52 is arranged opposite to the push member 51 and is movably connected; the second elastic member 53 is arranged between the push member 51 and the sealing member 52, and abuts against the push member 51 and the sealing member 52 respectively; wherein, blowing air into the active groove 113 through the first blowing hole 115 can make the sealing member 52 drive the second elastic member 53 and the push member 51 to move, so that the pushing member 41 pushes the first positioning member 20 and the movable assembly 40 to move in turn.

[0037] The third inclined surface 511 abutting against and matching the first inclined surface 211, and the fourth inclined surface 512 abutting against and matching the second inclined surface 411A are respectively provided on different sides of the push member 51. The seal 52 and the push member 51 can be connected by a movable pin, so that the seal 52 and the push member 51 can be abutted, or there can be a gap between the seal 52 and the push member 51; the two ends of the second elastic member 53 can be located at the push member 51 and the seal 52 respectively, so that when the seal 52 and the push member 51 abut, the second elastic member 53 is compressed and located in the push member 51 and the seal 52 respectively. Specifically, the second elastic member 53 is a spring.

[0038] In this way, by blowing air into the movable groove 113 through the first blowing hole 115, the sealing member 52 can drive the second elastic member 53 and the push member 51 to move, so that the pushing member 41 pushes the two first positioning members 20 to move oppositely along the first direction through the third inclined surface 511 so that the two first positioning members 20 respectively abut the two first inner walls, and then the push member 51 remains stationary, and the second elastic member 53 is compressed until the sealing member 52 abuts against the push member 51, and then the sealing member 52 and the push member 51 move upward, and the pushing member 41 pushes the movable component 40 through the fourth inclined surface 512, so that the movable component 40 drives the two second positioning members 30 to move a corresponding distance along the second direction according to the thickness of the second inner wall, so that the two second positioning members 30 abut against the second inner wall.

[0039] The positioning mechanism 100 further includes an adsorbent 60, which is a T-shaped columnar structure. The adsorbent 60 is disposed in the support portion 11. A first air suction hole 61 is provided in the adsorbent 60, and a second air suction hole 121 is provided in the cover portion 12. One end of the second air suction hole 121 is connected to the first air suction hole 61, and one end of the second air suction hole 121 away from the first air suction hole 61 passes through the side of the cover portion 12 away from the support portion 11 to adsorb the workpiece. In this way, by evacuating the first air suction hole 61, the second air suction hole 121 connected to the first air suction hole 61 can generate negative pressure and adsorb the bottom surface of the workpiece.

[0040] The adsorption member 60 is located in the movable groove 113 and penetrates the sealing member 52 and the thrust member 51. The supporting member 10 also includes a connecting portion 13. The connecting portion 13 is arranged on the side of the supporting portion 11 away from the sealing portion 12 and is arranged corresponding to the adsorption member 60. A third air suction hole 131 and a second air blowing hole 132 are opened in the connecting portion 13. One end of the third air suction hole 131 is connected to the first air suction hole 61, and the end of the third air suction hole 131 away from the first air suction hole 61 is connected to the outside world, and one end of the second air blowing hole 132 is connected to the first air blowing hole 115, and the end of the second air blowing hole 132 away from the first air blowing hole 115 is connected to the outside world.

[0041] In this way, by exhausting air from the third air suction hole 131, negative pressure can be generated in the first air suction hole 61 and the second air suction hole 121 connected to the third air suction hole 131, and the second air suction hole 121 can adsorb the bottom surface of the workpiece. By blowing air from the second air blowing hole 132, the first air blowing hole 115 connected to the second air blowing hole 132 can blow air into the movable groove 113, so that the sealing member 52 drives the second elastic member 53 and the push member 51 to move.

[0042] The implementation process of the positioning mechanism 100 provided in the embodiment of the present application is as follows: By blowing air into the second blowing hole 132, the first blowing hole 115 connected with the second blowing hole 132 blows air into the movable groove 113, so that the sealing member 52 drives the second elastic member 53 and the push member 51 to move, and the push member 41 pushes the moving parts 21 of the two first positioning members 20 to move in opposite directions along the first direction through the third inclined surface 511, so that parts of the abutting parts 22 of the two first positioning members 20 extend out of the avoidance groove 112 and respectively abut against the two first inner side walls of the workpiece; Continue to blow air into the second blowing hole 132, the sealing member 52 continues to move upward, the push member 51 does not move, and the second elastic member 53 is compressed until the second elastic member 53 is compressed to the point where the sealing member 52 abuts against the push member 51; Continue to blow air to the second blowing hole 132, the sealing member 52 and the abutting member 51 move upward, the pushing member 41 pushes the pushing portion 411 through the fourth inclined surface 512, the pushing portion 411 drives the connecting rod 412 to move through the movable rod 413, the connecting rod 412 drives the two pull rods 42 and the sliding portion 31 connected to the pull rod 42 to slide, the sliding portion 31 moves a corresponding distance along the second direction according to the thickness of the second inner side wall, so that the abutting portions 32 of the two second positioning members 30 abut against the second inner side wall; By evacuating the third suction hole 131 , negative pressure can be generated in the first suction hole 61 and the second suction hole 121 connected with the third suction hole 131 , and the second suction hole 121 can adsorb the bottom surface of the workpiece, thereby achieving positioning of the workpiece.

[0043] The above-mentioned positioning mechanism 100 first pushes the two first positioning members 20 to move in opposite directions along the first direction through the driving component 50, so that the two first positioning members 20 respectively abut against the two first inner walls, and then the driving component 50 pushes the movable component 40 to drive at least two second positioning members 30 to move along the second direction, so that at least two second positioning members 30 abut against the second inner wall. Since at least two second positioning members 30 can move a corresponding distance along the second direction according to the thickness of the second inner wall, at least two second positioning members 30 can abut against workpieces with different inner wall thicknesses.

[0044] 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 mechanism for positioning a workpiece, the workpiece having two opposite first inner side walls and a second inner side wall disposed between the two first inner side walls, characterized in that: It comprises a bearing member, two first positioning members respectively arranged on the bearing member, at least two second positioning members, a movable component, and a driving component; The peripheral side of the carrier is sleeved by the workpiece, the two first positioning members are arranged opposite to each other along a first direction, at least two second positioning members are arranged side by side between the two first positioning members, and at least two second positioning members are arranged spaced apart from the two first positioning members along a second direction perpendicular to the first direction, one end of the movable component is movably connected with at least two second positioning members, the driving component is located between the two first positioning members, and different sides of the driving component are respectively abutted with one end of the two first positioning members close to each other and one end of the movable component away from the second positioning member; In which, the driving component can push the two first positioning members to move opposite to each other along the first direction so that the two first positioning members respectively abut against the two first inner walls, and when the first positioning members abut against the first inner wall, the movable component is pushed to drive at least two second positioning members to move a corresponding distance along the second direction according to the thickness of the second inner wall, so that at least two second positioning members abut against the second inner wall.

2. The positioning mechanism according to claim 1, characterized in that: The bearing member comprises: A support portion, wherein a receiving groove is formed on one side of the support portion, wherein the second positioning member and the movable component are both disposed in the receiving groove; The covering portion is disposed on one side of the supporting portion and covers the containing groove.

3. The positioning mechanism according to claim 2, characterized in that: Each of the first positioning members comprises: A moving part, disposed in the supporting part and sliding along the first direction, wherein one end of the moving part close to the driving component is provided with a first inclined surface, and the first inclined surface abuts against the driving component; An abutment portion, one end of which is connected to an end of the movable portion away from the driving assembly, and the other end of the abutment portion extends away from the movable portion, and corresponding side edges of the support portion and the covering portion are provided with avoidance grooves, and the abutment portion is arranged in the avoidance groove and can be moved out of the avoidance groove to abut against the first inner wall.

4. The positioning mechanism according to claim 2, characterized in that: Each of the second positioning members comprises: a sliding portion, disposed in the supporting portion and sliding along the second direction, one end of the sliding portion being movably connected to one end of the movable component; The abutting portion is arranged on a side of the sliding portion away from the movable component to abut against the second inner wall.

5. The positioning mechanism according to claim 4, characterized in that: The activity components include: A pushing member, one end of which is in contact with the driving assembly; At least two pull rods are provided between the pushing member and the sliding portion, one end of each pull rod is rotatably connected to the pushing member, and the other end of each pull rod is rotatably connected to the corresponding sliding portion; The first elastic member is disposed between the pushing member and the sliding portion, one end of the first elastic member abuts against the pushing member, and the other end of the first elastic member abuts against the supporting portion, so as to reset the pushing member.

6. The positioning mechanism according to claim 5, characterized in that: The pusher comprises: A pushing portion, disposed between the driving assembly and the pull rod, wherein one end of the pushing portion close to the driving assembly is provided with a second inclined surface, and the second inclined surface abuts against the driving assembly; A connecting rod is provided between the pushing portion and the pulling rod, wherein a side of the connecting rod away from the pushing portion is rotatably connected to an end of at least two pulling rods away from the corresponding sliding portion; A movable rod, one end of which is fixedly connected to the connecting rod, and one end of which is away from the connecting rod and movably connected to the pushing part.

7. The positioning mechanism according to claim 6, characterized in that: The activity components also include: Two limiting members are arranged on opposite sides of the pushing portion and the connecting rod, wherein one of the limiting members is connected to the sealing portion, and the other limiting member is connected to the bottom of the accommodating groove.

8. The positioning mechanism according to claim 2, characterized in that: The support portion is provided with a movable groove communicating with the receiving groove and a first blowing hole communicating with the movable groove, and the driving assembly includes: A push member, slidably disposed in the movable groove, and respectively abutting against the first positioning member and the movable component; A sealing member is slidably and sealingly disposed in the movable groove, and the sealing member is disposed opposite to the push member and is movably connected to the push member; A second elastic member is disposed between the push member and the sealing member, and abuts against the push member and the sealing member respectively; Blowing air into the movable groove through the first blowing hole can cause the sealing member to drive the second elastic member and the resisting member to move, so that the pushing member can push the first positioning member and the movable component to move in turn.

9. The positioning mechanism according to claim 8, characterized in that: The positioning mechanism also includes: An adsorption member is arranged in the supporting part, a first air suction hole is opened in the adsorption member, a second air suction hole is opened in the covering part, one end of the second air suction hole is connected with the first air suction hole, and one end of the second air suction hole away from the first air suction hole passes through the side of the covering part away from the supporting part to adsorb the workpiece.

10. The positioning mechanism according to claim 9, characterized in that: The adsorption member is located in the movable groove and penetrates the sealing member and the pushing member, the bearing member also includes a connecting portion, the connecting portion is arranged on the side of the supporting portion away from the sealing portion and is arranged corresponding to the adsorption member, a third air suction hole and a second air blowing hole are opened in the connecting portion, one end of the third air suction hole is connected with the first air suction hole, and one end of the third air suction hole away from the first air suction hole is connected with the outside world, one end of the second air blowing hole is connected with the first air blowing hole, and one end of the second air blowing hole away from the first air blowing hole is connected with the outside world.

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