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CN-116060982-B - Positioning mechanism

CN116060982BCN 116060982 BCN116060982 BCN 116060982BCN-116060982-B

Abstract

The invention discloses a positioning mechanism, which belongs to the technical field of positioning assistance and comprises a positioning assembly and a carrier assembly, wherein the positioning assembly comprises a positioning main body and a plurality of first positioning bosses fixedly arranged on the top surface of the positioning main body, a first positioning groove is formed between two adjacent first positioning bosses, the carrier assembly comprises a shell and a plurality of second positioning bosses, the shell is of a hollow structure and is provided with an opening at the bottom end, the second positioning bosses are positioned in the shell and fixedly connected to the top wall of the shell, the shell is used for fixing a product to be positioned, the shell is sleeved outside at least part of the positioning main body, and the second positioning bosses are arranged in the first positioning grooves and are abutted to the first positioning bosses. The positioning mechanism provided by the invention has higher repeated positioning precision, so that the dimensional precision of a processed product can be ensured, and the rejection rate is reduced.

Inventors

  • XIONG LEI
  • JI SHIYAN
  • LI YONG

Assignees

  • 立讯智造科技(常熟)有限公司

Dates

Publication Date
20260508
Application Date
20230130

Claims (13)

  1. 1. Positioning mechanism, its characterized in that includes: The positioning assembly (1) comprises a positioning main body (11) and a plurality of first positioning bosses (12) fixedly arranged on the top surface of the positioning main body (11), wherein a first positioning groove (10) is formed between two adjacent first positioning bosses (12); The carrier assembly (2) comprises a shell (21) and a plurality of second positioning bosses (22), wherein the shell (21) is of a hollow structure and is provided with an opening at the bottom end, the second positioning bosses (22) are positioned in the shell (21) and fixedly connected to the top wall of the shell (21), and the shell (21) is used for fixing a product to be positioned; The shell (21) is sleeved outside at least part of the positioning main body (11), and the second positioning boss (22) is arranged in the first positioning groove (10) and is abutted against the first positioning boss (12); Locking subassembly (3) and elastic component (4), locking subassembly (3) including movable mounting in movable part (31) in locating component (1) and by movable part (31) promote gliding sliding block (32), elastic component (4) are located in locating component (1), just the one end of elastic component (4) with movable part (31) butt, the other end of elastic component (4) with the roof butt of locating component (1), the inside wall of casing (21) is equipped with interior pull ring (215), sliding block (32) are in under the promotion of elastic component (4) elasticity support in interior pull ring (215).
  2. 2. The positioning mechanism according to claim 1, wherein the second positioning boss (22) comprises a boss portion (221) and two elastic portions (222) fixedly connected to two sides of the boss portion (221), the boss portion (221) is fixedly connected to the housing (21), and the elastic portions (222) are abutted against the first positioning boss (12).
  3. 3. The positioning mechanism according to claim 2, wherein the elastic portion (222) has inclined side surfaces (2221) that are opposed and parallel to each other in a thickness direction of the boss portion (221), and the elastic portion (222) has deformation holes (2222), both the elastic portions (222) are located on both sides in a length direction of the boss portion (221), and the deformation holes (2222) penetrate the elastic portion (222) in a width direction of the boss portion (221).
  4. 4. A positioning mechanism according to claim 3, characterized in that the deformation holes (2222) are parallelogram shaped holes and the walls of the deformation holes (2222) are parallel to the oblique side surfaces (2221).
  5. 5. A positioning mechanism according to claim 3, wherein the elastic portion (222) has a first positioning inclined surface (2223) for contacting with the first positioning boss (12), the first positioning boss (12) has a second positioning inclined surface (121) for contacting with the first positioning inclined surface (2223), an included angle between the first positioning inclined surfaces (2223) of the two elastic portions (222) connected with the same boss portion (221) is a first included angle, an included angle between the second positioning inclined surfaces (121) located adjacent to the two first positioning bosses (12) and opposite to each other is a second included angle, and the first included angle is 0.4-0.7 degrees larger than the second included angle.
  6. 6. The positioning mechanism according to any one of claims 2 to 5, wherein the boss portion (221) has a positioning surface (2211), the positioning surface (2211) being planar and in contact with the top surface of the positioning body (11).
  7. 7. The positioning mechanism according to any one of claims 1-5, wherein the carrier assembly (2) further comprises a connection block (23) located within the housing (21) and fixedly connected to a top wall of the housing (21), and the second positioning boss (22) is fixedly connected to the connection block (23).
  8. 8. The positioning mechanism according to claim 7, wherein the carrier assembly (2) further comprises positioning pins (24), the housing (21) and the connection block (23) respectively have positioning holes (25), and the positioning pins (24) are inserted into the positioning holes (25) of the housing (21) and the positioning holes (25) of the connection block (23).
  9. 9. Positioning mechanism according to any of claims 1-5, characterized in that one of the outer side wall of the positioning body (11) and the inner side wall of the housing (21) has a guiding groove (111), the other has a guiding block (211) matching the guiding groove, and the guiding groove (111) extends in the axial direction of the positioning body (11) or the housing (21) and extends to the top surface of the positioning body (11) or the bottom surface of the housing (21), the guiding block (211) being provided in the guiding groove (111).
  10. 10. The positioning mechanism according to any one of claims 1 to 5, wherein the outer side wall of the housing (21) is provided with a second positioning groove (212) and a clamping position (213), the length direction of the second positioning groove (212) is parallel to the axial direction of the housing (21), and the clamping position (213) is an annular groove arranged on the housing (21) along the circumferential direction of the housing (21).
  11. 11. The positioning mechanism according to claim 1, wherein the positioning assembly (1) further comprises a base (13) which is connected to the positioning main body (11) in a sealing manner, the positioning main body (11) and the base (13) are surrounded to form an inner cavity (14), the elastic piece (4) is arranged in the inner cavity (14), an air cavity (5) is formed between the movable piece (31) and the base (13), the base (13) is provided with an air inlet hole (131) communicated with the air cavity (5), and air in the air cavity (5) can push the movable piece (31) to move in the axial direction of the positioning main body (11) so as to overcome the elasticity of the elastic piece (4) to pull the sliding block (32) out of the inner pull ring (215).
  12. 12. The positioning mechanism according to claim 11, wherein the movable member (31) comprises a piston module (311) and a return pin (312) with one end fixedly connected to the piston module (311), one end of the sliding block (32) is provided with a first through hole (321), the return pin (312) is arranged in the first through hole (321) in a penetrating manner, the axis of the return pin (312) is intersected with the axis of the piston module (311), the air cavity (5) is formed between the piston module (311) and the base (13), and the sliding block (32) is driven to move by the piston module (311) through the return pin (312).
  13. 13. The positioning mechanism according to any one of claims 1 to 5, wherein four second positioning bosses (22) are provided, four second positioning bosses (22) are distributed in a cross shape, four first positioning grooves (10) are correspondingly provided, four second positioning bosses (22) are in one-to-one correspondence with the four first positioning grooves (10), and the second positioning bosses (22) are placed in the corresponding first positioning grooves (10).

Description

Positioning mechanism Technical Field The invention relates to the technical field of positioning assistance, in particular to a positioning mechanism. Background In the process of processing the product on the numerical control machine tool, the product needs to be positioned by a positioning device so as to ensure the processing precision of the product. Among the prior art, positioning mechanism includes the base and can dismantle the carrier of connecting in the base, the top surface of base has first constant head tank, the carrier orientation has the location lug that mutually supports with first constant head tank towards the surface of base, when needs are fixed a position the product, fix the product on the carrier, then control the carrier and be close to the base and remove to make location lug and first constant head tank counterpoint, later with location lug card in first constant head tank, realized the location to the product. Because the first positioning groove is directly exposed outside, and after the base and the carrier are assembled, a gap exists between the base and the carrier, cutting fluid, impurities and the like generated in the machining process of the numerical control machine tool can enter the first positioning groove through the gap between the base and the carrier and stay in the first positioning groove, when the base is used for positioning a product again, the positioning accuracy is reduced, even the situation of positioning failure occurs, the dimensional accuracy of the machined product is reduced, the rejection rate is improved, that is, the positioning mechanism in the prior art cannot realize repeated positioning. Disclosure of Invention The invention aims to provide a positioning mechanism which can repeatedly position, has higher positioning precision, further can ensure the dimensional precision of processed products and reduces the rejection rate. The technical scheme adopted by the invention is as follows: positioning mechanism includes: the positioning assembly comprises a positioning main body and a plurality of first positioning bosses fixedly arranged on the top surface of the positioning main body, and a first positioning groove is formed between two adjacent first positioning bosses; The carrier assembly comprises a shell and a plurality of second positioning bosses, wherein the shell is of a hollow structure and is provided with an opening at the bottom end, the second positioning bosses are positioned in the shell and fixedly connected to the top wall of the shell, and the shell is used for fixing a product to be positioned; The shell is sleeved outside at least part of the positioning main body, and the second positioning boss is arranged in the first positioning groove and is abutted to the first positioning boss. Optionally, the second positioning boss includes a boss portion and two elastic portions respectively fixed to two sides of the boss portion, the boss portion is fixed to the housing, and the elastic portions are abutted to the first positioning boss. Optionally, the elastic portion has inclined side surfaces that are opposite and parallel to each other in the thickness direction of the boss portion, and the elastic portion has a deformation hole, two of the elastic portions are located on both sides in the length direction of the boss portion, and the deformation hole penetrates the elastic portion in the width direction of the boss portion. Optionally, the deformation hole is a parallelogram hole, and a hole wall of the deformation hole is parallel to the inclined side surface. Optionally, the elastic portion has a first positioning inclined plane used for contacting with the first positioning boss, the first positioning boss has a second positioning inclined plane used for contacting with the first positioning inclined plane, an included angle between the first positioning inclined planes of the two elastic portions connected with the same boss portion is a first included angle, an included angle between the second positioning inclined planes which are located between the adjacent two first positioning bosses and are opposite to each other is a second included angle, and the first included angle is 0.4-0.7 degree larger than the second included angle. Optionally, the boss portion has a positioning surface that is planar and contacts the top surface of the positioning body. Optionally, the carrier assembly further includes a connection block located in the housing and fixedly connected to a top wall of the housing, and the second positioning boss is fixedly connected to the connection block. Optionally, the carrier assembly further includes a positioning pin, the housing and the connection block have positioning holes respectively, and the positioning pin is disposed through the positioning holes of the housing and the positioning holes of the connection block. Optionally, one of the outer side wall of the positioning main body and the in