High-precision positioning clamp and positioning equipment

Abstract

The utility model discloses a high-precision positioning clamp and positioning equipment, the high-precision positioning clamp comprises a base body, a positioning assembly and a driving assembly, the base body is provided with at least two air cavities with openings, each air cavity is provided with a connector penetrating through the base body, and the connectors are used for being connected with an air source; the positioning assembly comprises a chuck, a pull rod and a first locking piece, the chuck comprises an assembly hole extending in the first direction, the pull rod is assembled in the assembly hole and comprises a pushing part, and in the second direction, the size of the end, away from the air cavity, of the pushing part is larger than that of the end, close to the air cavity, of the pushing part; a positioning hole is formed in the side wall of the chuck, the first locking piece is assembled in the positioning hole and abuts against the abutting-pushing part, and the driving assembly is connected to the end, close to the air cavity, of the pull rod and used for driving the pull rod to move in the first direction. The multiple positioning assemblies are driven by the air source, the whole structure is simple, the device can be applied to the fields of medical instruments, ophthalmology medical instruments and the like, driving is efficient, and the structure is simple.

Description

Technical Field

[0001] This utility model relates to the technical field of clamps, and in particular to a high-precision positioning clamp and positioning device. Background Technology

[0002] In related technologies, during the product processing, positioning equipment is needed to clamp and position the product. Most high-precision positioning fixtures are driven by hydraulic pressure, which has the technical problem of complex oil circuit structure, resulting in a complex overall fixture structure. Especially in the fields of medical equipment and ophthalmic medical equipment, there is a need for efficient, simple and easy-to-use high-precision positioning fixtures. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a high-precision positioning fixture that can improve the efficiency of the drive and the simplicity of the overall structure.

[0004] A high-precision positioning clamp according to a first aspect embodiment of the present invention is used to fix a product having a first positioning groove, comprising:

[0005] A base having at least two air cavities with openings, each air cavity having an interface penetrating the base for connecting an air source;

[0006] A positioning assembly includes a clamp, a pull rod, and a first locking member. The clamp is connected to the opening of the air chamber and seals the air chamber. The clamp includes a mounting hole extending along a first direction. The pull rod is slidably mounted in the mounting hole. The pull rod includes a rod portion and a pushing portion connected to the end of the rod portion away from the base. In a second direction, the dimension of the pushing portion away from the air chamber is larger than the dimension of the pushing portion near the air chamber. The second direction is relatively perpendicular to the first direction. A positioning hole communicating with the mounting hole is provided on the side wall of the clamp. The first locking member is movably mounted in the positioning hole along the second direction.

[0007] A drive assembly is connected to the end of the rod near the air chamber. Driven by the gas in the air chamber, the drive assembly can move the pull rod between a first position and a second position in a first direction. In the first position, the pushing part abuts against the first locking member, and part of the first locking member is exposed outside the clamp. The exposed first locking member is used to abut against the first positioning groove. In the second position, the pushing part releases its abutment against the first locking member, and the first locking member is driven to move in the second direction.

[0008] The high-precision positioning fixture according to the embodiments of this utility model has at least the following beneficial effects: the drive assembly drives the pull rod to move in the first direction, thereby adjusting the position of the side wall of the push part abutting against the first locking member, thereby adjusting the movement of the first locking member in the chuck, which is exposed or concealed in the chuck, so that the exposed part of the first locking member at the positioning hole abuts against the first positioning groove of the product, thereby clamping and positioning the product. The overall structure is relatively simple. At least two air chambers are connected through the air source, and the air source can be controlled to inject or discharge gas into one or more air chambers, so as to realize the simultaneous driving of multiple positioning components through one air source, resulting in high driving efficiency.

[0009] According to some embodiments of the present invention, the driving assembly includes a piston disposed in the air chamber, the piston being sealed to the chamber wall of the air chamber, and the piston being connected to one end of the rod near the air chamber.

[0010] According to some embodiments of the present invention, the drive assembly further includes an elastic element, one end of which abuts against the piston and the other end of which abuts against the clamp.

[0011] According to some embodiments of the present invention, the assembly hole includes a first channel and a second channel connected in sequence, wherein the inner diameter of the second channel is larger than the inner diameter of the first channel; the elastic element abuts against the piston and the inner wall of the second channel away from the piston in the first direction.

[0012] According to some embodiments of the present invention, the positioning component further includes a second locking member disposed on the clamp facing the product side, the second locking member extending along the first direction, the second locking member being adapted to engage with a second positioning groove disposed on the product to restrict the rotation of the product around the pull rod, the second positioning groove being disposed at one end of the product facing the clamp.

[0013] According to some embodiments of the present invention, the clamp includes a plug-in portion and an abutment portion arranged sequentially along a first direction. The product is provided with a plug-in groove, and the first positioning groove is provided on the inner side wall of the plug-in groove. The plug-in portion is adapted to be plugged into the plug-in groove. In a second direction, the size of the abutment portion is larger than the size of the plug-in portion. The abutment portion has a bearing surface for bearing the product on the side facing the product.

[0014] According to some embodiments of the present invention, the second locking member is disposed on the bearing surface.

[0015] According to some embodiments of the present invention, the positioning component includes at least two second locking members, and the at least two second locking members are disposed on the bearing surface.

[0016] According to some embodiments of the present invention, the positioning hole is disposed on the side wall of the insertion part.

[0017] The positioning device according to a second aspect of the present invention includes a high-precision positioning fixture according to a first aspect of the present invention and an air source pipeline. The air source pipeline includes branch pipes and a main pipe. Each of the interfaces connected to the base is connected to the branch pipes. Each of the branch pipes is connected to the main pipe. The main pipe is used to switch the air source on / off of each of the air chambers on the base.

[0018] The positioning device according to the embodiment of the present utility model has at least the following beneficial effects: the positioning device using the high-precision positioning fixture provides driving force through the interface on the base connected by the air source pipeline to drive the high-precision positioning fixture to clamp the product. Since the base is provided with at least two air chambers, and each air chamber is provided with a corresponding positioning component, multiple positioning components can be controlled by one air source, which improves the structural simplicity of the positioning device.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a three-dimensional structural diagram of the high-precision positioning fixture in an embodiment of this utility model;

[0022] Figure 2 This is a top view of the high-precision positioning fixture in another embodiment of the present invention;

[0023] Figure 3 yes Figure 2 A cross-sectional view of the high-precision positioning fixture at point AA.

[0024] Figure 4 This is a schematic diagram of the assembly structure of the pull rod in the first position in the high-precision positioning fixture of this utility model embodiment;

[0025] Figure 5 This is a schematic diagram of the structure of the chuck in the high-precision positioning fixture in this utility model embodiment;

[0026] Figure 6 This is a schematic diagram of the pull rod in the high-precision positioning fixture of this utility model embodiment.

[0027] Reference numerals: Base 100; Air cavity 101; Interface 102; Clamp 110; Assembly hole 111; First channel 112; Second channel 113; First locking element 114; Positioning hole 115; Insertion part 116; Abutment part 117; Bearing surface 118; Pull rod 120; Pushing part 121; Piston 122; Elastic element 123; Rod part 124; Second locking element 130; Product 200; Insertion groove 201; First positioning groove 202; Second positioning groove 203; First direction 300; Second direction 400. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] See Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a high-precision positioning fixture according to a first aspect embodiment of the present invention is used to fix a product 200 having a first positioning groove 202. The high-precision positioning fixture includes a base 100, a positioning component, and a driving component.

[0034] The base 100 is provided with at least two air cavities 101 with openings. Each air cavity 101 is provided with an interface 102 that penetrates the base 100. The interface 102 is used to connect an air source. The air source can be connected through parts with channel-like structures such as delivery pipes and hoses to deliver gas into the air cavity 101 and provide driving force for the high-precision positioning fixture.

[0035] The drive assembly is connected to the end of the pull rod 120 near the air chamber 101. The drive assembly is used to drive the pull rod 120 to move in the first direction 300. The drive force provided by the air source drives the drive assembly to move the pull rod 120 in the mounting hole 111 along the first direction 300.

[0036] The positioning assembly includes a chuck 110, a pull rod 120, and a first locking member 114. The chuck 110 is connected to the opening of the air chamber 101 to seal the air chamber 101. The chuck 110 includes a mounting hole 111 extending along a first direction 300. The pull rod 120 is slidably mounted in the mounting hole 111. The pull rod 120 can move along the first direction 300 in the mounting hole 111. At least a portion of the pull rod 120 is located in the mounting hole 111, and another portion of the pull rod 120 is located in the air chamber 101 communicating with the through hole.

[0037] See Figure 3 , Figure 6As shown, the pull rod 120 includes a rod portion 124 and a pushing portion 121 connected to the end of the rod portion 124 away from the base 100. In the second direction 400, the dimension D1 of the pushing portion 121 away from the air chamber 101 is larger than the dimension D2 of the pushing portion 121 near the air chamber 101. The second direction 400 is relatively perpendicular to the first direction 300. The side wall of the chuck 110 is provided with a positioning hole 115 communicating with the assembly hole 111. The first locking member 114 is movably assembled in the positioning hole 115 along the second direction. The pull rod 120 is driven by the air source to move in the assembly hole 111 along the first direction 300. When the pull rod 120 moves, it pushes against the air chamber 100. The contact position between the push part 121 and the first locking member 114 changes, causing the first locking member 114 to move relative to the side wall of the push part 121. The drive assembly, driven by the gas in the air chamber, can drive the pull rod 120 to move along the first direction 300 between the first position and the second position. In the first position, the push part 121 abuts against the first locking member 114, and part of the first locking member 114 is exposed outside the chuck 110. The exposed first locking member 114 is used to abut against the first positioning groove 202. In the second position, the push part 121 releases its abutment against the first locking member 114, and the first locking member 114 is driven to move in the second direction.

[0038] In some examples, the drive assembly includes a piston 122 disposed within the air chamber 101 and sealed to the wall of the air chamber 101. The piston 122 is connected to the end of the rod 124 near the air chamber 101. A sealing ring may be fitted on the side wall of the piston 122 in the second direction 400 to increase the sealing effect of the piston 122 on the air chamber 101. Alternatively, an annular structure integrally formed with the piston 122 may be fitted on the side wall of the piston 122 in the second direction 400. Multiple sealing rings or annular structures may be provided to improve the sealing effect on the air chamber 101, thereby maintaining the stability of the air source driving the piston 122 to drive the rod 120.

[0039] Correspondingly, the drive assembly also includes an elastic element 123, one end of which abuts against the piston 122, and the other end against the chuck 110. Due to the elastic element 123, when gas is supplied to the air chamber 101 from the air source, the piston 122 drives the pull rod 120 to move away from the air chamber 101. At this time, the elastic element 123 is in a compressed state, and the first locking member 114 abuts against the side of the pushing part 121 near the air chamber 101. The first locking member 114, under force, can retract into the chuck 110 to unlock the product 200 held in the chuck 110. When gas is discharged from the air chamber 101 through the interface 102, the piston 122 is subjected to… As the gas pressure decreases, the elastic element 123 releases its elasticity, pushing the piston 122 towards the gas chamber 101. This causes the pull rod 120 to move towards the gas chamber 101. The first locking element 114 is abutted by the end of the push portion 121 away from the gas chamber 101. The first locking element 114 is engaged in the positioning hole 115, with a portion of the first locking element 114 exposed outside the chuck 110. The exposed portion of the first locking element 114 is engaged in the first positioning groove 202 of the product 200 to clamp the product 200. The elastic element 123 can be a spring or other device with an elastic structure.

[0040] In a specific example, the mounting hole 111 includes a first channel 112 and a second channel 113 connected in sequence. The inner diameter of the second channel 113 is larger than that of the first channel 112. The elastic element 123 abuts against the piston 122 and the inner wall of the second channel 113 away from the piston 122 in the first direction 300. By setting the second channel 113, the required length of the elastic element 123 in the first direction 300 is reduced, thereby improving the efficiency and rebound effect of the elastic element 123 during rebound.

[0041] In some examples, the positioning assembly further includes a second locking member 130 disposed on the chuck 110 facing the product 200. The second locking member 130 extends along a first direction 300 and is adapted to engage with a second positioning groove 203 disposed on the product 200 to restrict the rotation of the product 200 around the pull rod 120. The second positioning groove 203 is disposed at the end of the product 200 facing the chuck 110. When the chuck 110 clamps the product 200, the first locking member 114 engages in the first positioning groove 202, securing the product 200 in the first direction 300 and preventing the product 200 from detaching from the chuck 110 along the first direction 300. When the chuck 110 clamps the product 200, the second locking member 130 engages in the second positioning groove 203, restricting the rotation of the product 200 around the pull rod 120, thereby improving the accuracy and stability of clamping the product 200.

[0042] See Figure 3 , Figure 5As shown in the illustration, as a specific example, the clamp 110 includes a plug-in portion 116 and an abutment portion 117 arranged sequentially along the first direction 300. The product 200 is provided with a plug-in groove 201, and a first positioning groove 202 is provided on the inner side wall of the plug-in groove 201. The plug-in portion 116 is adapted to be plugged into the plug-in groove 201. The positioning hole 115 can be provided on the side wall of the plug-in portion 116. When the product 200 is plugged into the plug-in portion 116, the positioning hole 115 can be exposed or hidden in the clamp 110 by adjusting the position of the pull rod 120, so as to adjust the first locking member 114 to be engaged in the first positioning groove 202 or to be able to be withdrawn from the first positioning groove 202, thereby clamping or unlocking the product 200.

[0043] In the second direction 400, the size of the abutment portion 117 is larger than the size of the insertion portion 116; the abutment portion 117 has a bearing surface 118 for bearing the product 200 on the side facing the product 200. The bearing surface 118 is used to bear the product 200 clamped on the chuck 110 to improve the stability when clamping the product 200.

[0044] The second locking member 130 can be provided on the bearing surface 118 to improve the simplicity of the positioning component structure. The product 200 is supported on the bearing surface 118, and the product 200 is restricted from rotating around the pull rod 120 by the second locking member 130 on the bearing surface 118.

[0045] The positioning assembly may also be provided with at least two second locking elements 130, specifically, three, four or more second locking elements 130, to improve the restriction effect on the rotation of the product 200 around the pull rod 120.

[0046] In summary, in a specific example, the specific operation process includes: the gas source inputs gas into the gas chamber 101; the piston 122 drives the pull rod 120 to move away from the gas chamber 101 along the first direction 300, so that the end of the pushing part 121 near the gas chamber 101 abuts against the first locking member 114; the first locking member 114 can be forcefully retracted into the chuck 110 to prepare for placing the product 200 on the chuck 110; the insertion slot 201 of the product 200 is placed on the insertion part 116 of the chuck 110 and engaged with the insertion part 116; the second... The locking member 130 is inserted into the second positioning groove 203 of the product 200 to restrict the product 200 from rotating around the pull rod 120. Then, the air chamber 101 discharges gas outward, causing the cylinder to drive the pull rod 120 to move towards the air chamber 101. The end of the pushing part 121 away from the air chamber 101 abuts against the first locking member 114, causing the first locking member 114 to engage in the positioning hole 115. A portion of the first locking member 114 protrudes from the chuck 110 at the positioning hole 115, and the exposed portion engages in the first positioning groove 202. Thus, the clamping and positioning of the product 200 is completed. Conversely, gas is injected into the air chamber 101 again through the air source to unlock the product 200, allowing the product 200 to detach from the chuck 110 along the first direction 300.

[0047] In practical applications, this high-precision positioning fixture can be used in ophthalmic equipment, medical devices, and precision machining technologies.

[0048] According to a second aspect of the present invention, the positioning device includes a high-precision positioning fixture according to a first aspect of the present invention and an air source pipeline. The air source pipeline includes branch pipes and a main pipe. Each interface 102 connected to the base 100 is connected to a branch pipe. Each branch pipe is connected to the main pipe. The main pipe is used to switch the air source on / off of each air chamber on the base 100. A single air source provides driving force for multiple positioning components, resulting in high driving efficiency and a simple overall structure.

[0049] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A high-precision positioning fixture for fixing a product (200) having a first positioning groove (202), characterized in that, include: A base (100) is provided with at least two air cavities (101) with openings, and each air cavity (101) is provided with an interface (102) that penetrates the base (100) and the interface (102) is used to connect an air source; The positioning assembly includes a clamp (110), a pull rod (120), and a first locking member (114). The clamp (110) is connected to the opening of the air chamber (101) and seals the air chamber (101). The clamp (110) includes a mounting hole (111) extending along a first direction (300). The pull rod (120) is slidably mounted in the mounting hole (111). The pull rod (120) includes a rod portion (124) and a pusher connected to the end of the rod portion (124) facing away from the base (100). In the second direction (400), the dimension of the end of the pushing part (121) away from the air cavity (101) is larger than the dimension of the end of the pushing part (121) near the air cavity (101); the second direction (400) is relatively perpendicular to the first direction (300); the side wall of the chuck (110) is provided with a positioning hole (115) communicating with the assembly hole (111), and the first locking member (114) is movably assembled in the positioning hole (115) along the second direction (400); A drive assembly is connected to one end of the rod (124) near the air chamber (101). Driven by the gas in the air chamber (101), the drive assembly can drive the pull rod (120) to move between a first position and a second position along a first direction (300). In the first position, the push part (121) abuts against the first locking member (114), and the first locking member (114) is partially exposed outside the clamp (110). The exposed first locking member (114) is used to abut against the first positioning groove (202). In the second position, the push part (121) releases the abutment against the first locking member (114), and the first locking member (114) is driven to move in the second direction (400).

2. The high-precision positioning fixture according to claim 1, characterized in that, The drive assembly includes a piston (122) disposed in the air chamber (101), the piston (122) being sealed to the wall of the air chamber (101), and the piston (122) also being connected to the rod (124) near one end of the air chamber (101).

3. The high-precision positioning fixture according to claim 2, characterized in that, The drive assembly also includes an elastic element (123), one end of which abuts against the piston (122) and the other end of which abuts against the chuck (110).

4. The high-precision positioning fixture according to claim 3, characterized in that, The assembly hole (111) includes a first channel (112) and a second channel (113) connected in sequence, wherein the inner diameter of the second channel (113) is larger than the inner diameter of the first channel (112); The elastic element (123) abuts against the piston (122) and the inner wall of the second channel (113) in the first direction (300) away from the piston (122).

5. The high-precision positioning fixture according to claim 1, characterized in that, The positioning assembly further includes a second locking member (130) disposed on the clamp (110) facing the product (200). The second locking member (130) extends along the first direction (300) and is adapted to engage with a second positioning groove (203) disposed on the product (200) to restrict the rotation of the product (200) around the pull rod (120). The second positioning groove (203) is disposed at one end of the product (200) facing the clamp (110).

6. The high-precision positioning fixture according to claim 5, characterized in that, The clamp (110) includes a plug-in portion (116) and an abutment portion (117) arranged sequentially along a first direction (300). The product (200) is provided with a plug-in groove (201). The first positioning groove (202) is provided on the inner sidewall of the plug-in groove (201). The plug-in portion (116) is suitable for plugging into the plug-in groove (201). In the second direction (400), the size of the abutment portion (117) is larger than the size of the plug-in portion (116). The abutment portion (117) has a bearing surface (118) for bearing the product (200) on the side facing the product (200).

7. The high-precision positioning fixture according to claim 6, characterized in that, The second locking member (130) is disposed on the bearing surface (118).

8. The high-precision positioning fixture according to claim 6, characterized in that, The positioning component includes at least two second locking members (130), which are disposed on the bearing surface (118).

9. The high-precision positioning fixture according to claim 6, characterized in that, The positioning hole (115) is provided on the side wall of the plug part (116).

10. A positioning device, characterized in that, include: High-precision positioning fixture according to any one of claims 1 to 9; The gas supply pipeline includes branch pipes and a main pipe. Each of the interfaces (102) connected to the base (100) is connected to the branch pipes. Each branch pipe is connected to the main pipe. The main pipe is used to switch the gas supply on / off of each of the gas chambers (101) on the base (100).

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