Screw raceway three-coordinate measuring and positioning device

Abstract

The utility model relates to a screw rollaway nest three-coordinate measuring and positioning device which comprises a base, a guide part, two moving parts, a driving part and two clamping parts, the guide part is fixed to the inner front side of the base, the two moving parts are located on the same vertical plane and are arranged on the guide part in a sliding mode through driving of the driving part, and the two clamping parts are fixed to the guide part. The front side of each moving part is detachably and fixedly provided with a clamping part, and the front ends of the two clamping parts penetrate out of the base. Through cooperative arrangement of the guide part, the two moving parts, the driving part and the two clamping parts, the screw rod can be clamped and fixed from the end faces of the two ends of the screw rod when the screw rod is fixed, and then the situation that when the device fixes the screw rod, the outer wall of a shaft body at the end of the screw rod is blocked is avoided; moreover, the influence on the measurement of a three-coordinate measuring instrument marble caused by the too small gap between the clamping part of the device and the end part of the screw raceway is avoided, and the comprehensiveness of three-coordinate detection after the screw is fixed can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of positioning devices, and in particular to a screw raceway three-coordinate measurement positioning device. Background Art

[0002] A three-dimensional coordinate measuring machine is an instrument that can measure geometric shapes, lengths, circumferences, and graduations within the space of a hexahedron. When a contact-type three-dimensional coordinate measuring machine is used, its probe can be used to contact the object being measured and collect data points in a specific area on the surface of the object being measured. This measurement method is commonly used for measuring machined products, pressed products, metal films, etc.

[0003] A three-coordinate measuring machine usually uses a three-jaw chuck to fix the object to be measured. However, when measuring objects such as screws1, the clamping of the three-jaw chuck will affect the detection of the lower end of the thread raceway. For this reason, in the relevant technology, a Chinese utility model patent with publication number CN220708344U proposes a three-coordinate measurement and positioning device for a screw raceway, which installs a fixed seat on the claws of the three-jaw chuck of a four-axis linkage turntable, and clamps the screw through the clamping mechanism on the fixed seat, leaving a gap under the screw, so that the probe of the three-coordinate measuring machine can enter the lower end of the screw to detect the chamfer data of the lower end of the screw.

[0004] The above-mentioned related technologies have the following defects: when fixing the screw, the above-mentioned screw raceway three-coordinate measurement and positioning device still needs to be clamped with the optical axis part of the screw end, which still causes the problem of affecting the contact between the probe of the three-coordinate measuring machine and the screw end (for example, when it is necessary to detect the diameter of the optical axis part of the screw end). Utility Model Content

[0005] In order to improve the problem in the prior art that the screw raceway three-coordinate measurement and positioning device needs to clamp the optical axis part of the screw end when fixing the screw, which will affect the contact detection between the probe of the three-coordinate measuring instrument and the screw end, the present application provides a screw raceway three-coordinate measurement and positioning device.

[0006] The present application provides a screw raceway three-coordinate measurement and positioning device that adopts the following technical solution:

[0007] A screw raceway three-coordinate measurement and positioning device comprises a base, a guide part, two moving parts, a driving part and two clamping parts, wherein the guide part is fixed to the inner front side of the base, the two moving parts are located on the same vertical plane and are slidingly arranged on the guide part driven by the driving part, a clamping part is detachably mounted and fixed on the front side of each moving part, and the front ends of the two clamping parts are both extended to the outside of the base, the driving part comprises two groups of symmetrical drive connection components, the drive connection components comprise a first connecting frame, a swing arm and a positioning shaft, one end of the first connecting frame is rotationally connected to the adjacent moving part, the other end of the first connecting frame is rotationally connected to the front end of the swing arm, the positioning shaft is inserted in the middle of the swing arm, and the two ends of the positioning shaft are respectively fixedly connected to the two side walls opposite to the base.

[0008] Furthermore, the driving part also includes two second connecting frames, a sliding sleeve and a base shaft, and the facing sides of the swing arms in the two groups of the driving connection components are formed with a first extension frame, the adjacent ends of the two first extension frames are each rotatably connected to a second connecting frame, and the front ends of the two second connecting frames are rotatably connected to the sliding sleeves, the sliding sleeves are slidably sleeved on the outside of the base shaft, and the front end of the base shaft is fixedly connected to the back side of the guide part. The driving part also includes two movable buttons and a driving source, the rear ends of the swing arms in the two groups of the driving connection components are formed with a second extension frame, the adjacent ends of the two second extension frames are each rotatably connected to a movable button, the driving source is arranged between the two movable buttons, and the top of the driving source and its output end are respectively connected and fixed to the facing surfaces of the two movable buttons, and the driving source is arranged as a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0009] Furthermore, a guide groove is formed on the front side of the guide portion, and the guide groove passes through the top and the bottom of the guide portion respectively, and the first connecting frame movably passes through the guide groove.

[0010] Furthermore, two lugs are formed on one end of the movable part facing the driving connection assembly, a hanging shaft fixed thereto is inserted between the two lugs, the first connecting frame is sleeved on the hanging shaft and rotatably connected thereto, and a plurality of connecting holes cooperating with the clamping part are also formed on the movable part, and the connecting holes are set as threaded holes.

[0011] Furthermore, the clamping part includes a connecting block, a limiting block and a number of clamping part fixing holes equal to the number of connecting holes, the limiting block is formed on the front side of the connecting block, and several clamping part fixing holes are formed on the front side of the limiting block and penetrate the limiting block and the connecting block.

[0012] Furthermore, a movable groove communicating with the inner cavity of the base is formed on the front side, the connecting block is slidably arranged in the movable groove, and the limit block is located at the front side of the movable groove. An outer edge extension portion is also formed on the outer edge of the base, and a plurality of base fixing holes are formed on the outer edge extension portion.

[0013] The beneficial technical effect of the present application is: through the coordinated arrangement of the guide part, the two moving parts, the drive part and the two clamping parts, the screw can be clamped and fixed from the end faces at both ends when being fixed, thereby avoiding the device blocking the outer wall of the end shaft when fixing the screw, and avoiding the small gap between the clamping part of the device and the end of the screw raceway affecting the measurement of the pinball of the three-coordinate measuring instrument, which can improve the comprehensiveness of the three-coordinate detection after the screw is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the structure of the cutaway three-coordinate measurement and positioning device for a screw raceway according to an embodiment of the present application;

[0015] Figure 2 yes Figure 1 Schematic diagram of the overall structure of the three-coordinate measurement and positioning device for the middle screw raceway;

[0016] Figure 3 It is a structural schematic diagram of the guide part in the embodiment of the present application;

[0017] Figure 4 It is a structural schematic diagram of the moving part in the embodiment of the present application;

[0018] Figure 5 is a schematic diagram of the structure of the driving unit in an embodiment of the present application;

[0019] Figure 6 It is a schematic diagram of the structure of the clamping part in the embodiment of the present application.

[0020] Figure numerals: 10, base; 11, movable groove; 12, outer edge extension; 13, base fixing hole; 20, guide portion; 21, guide groove; 30, moving portion; 31, lug; 32, hanging shaft; 33, connecting hole; 40, driving portion; 41, first connecting frame; 42, swing arm; 421, first extension frame; 422, second extension frame; 43, positioning shaft; 44, second connecting frame; 45, movable button; 46, sliding sleeve; 47, base shaft; 48, driving source; 50, clamping portion; 51, connecting block; 52, limit block; 53, clamping portion fixing hole. DETAILED DESCRIPTION

[0021] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0022] The present application embodiment discloses a three-coordinate measurement and positioning device for a screw raceway. Figure 1 and Figure 2 The screw raceway three-coordinate measurement and positioning device comprises a base 10, a guide part 20, two moving parts 30, a driving part 40 and two clamping parts 50. The guide part 20 is fixed to the inner front side of the base 10; the two moving parts 30 are located on the same vertical plane and are slidingly arranged on the guide part 20 driven by the driving part 40; the front side of each moving part 30 can be fixed with a detachable clamping part 50 by bolts, and the front ends of the two clamping parts 50 are both extended to the outside of the base 10, so that after the screw is placed between the two clamping parts 50, the distance between the two clamping parts 50 can be adjusted, and the screw can be clamped and fixed at both end faces without blocking the outer wall of the optical axis part of the screw end.

[0023] See also Figure 2 The front of the base 10 is formed with a movable groove 11 communicating with the inner cavity thereof, and the two clamping parts 50 can move longitudinally along the movable groove 11. An outer edge extension part 12 is also formed on the outer edge of the base 10, and a plurality of base fixing holes 13 are formed on the outer edge extension part 12. Bolts can be passed through the base fixing holes 13 to fix the base 10 on the placement table of the three-dimensional coordinate measuring machine.

[0024] See also Figure 3 The front of the guide part 20 is formed with a guide groove 21, which respectively passes through the top and bottom of the guide part 20. The two moving parts 30 slide in the guide groove 21 in a manner matching the cross-sectional shape of the guide groove 21, so that the guide groove 21 can guide the moving part 30 so that it can only move in the longitudinal direction.

[0025] See also Figure 4 The moving part 30 has two lugs 31 formed on one end facing the driving connection assembly, and a hanging shaft 32 fixed thereto is inserted between the two lugs 31. The first connecting frame 41 in the driving part 40 is sleeved on the hanging shaft 32 and is rotatably connected thereto, so that when the driving part 40 applies force to the hanging shaft 32, the moving part 30 can be driven to slide in the guide groove 21. The moving part 30 also has a plurality of connecting holes 33 that can be matched with the clamping part 50. The connecting holes 33 can be preset as threaded holes so that the moving part 30 and the clamping part 50 can be connected and fixed by bolts.

[0026] See also Figure 1 and Figure 5 The driving part 40 includes two groups of symmetrical driving connection components, two second connecting frames 44, two movable buttons 45, a sliding sleeve 46, a base shaft 47 and a driving source 48; the driving connection components include a first connecting frame 41, a swing arm 42 and a positioning shaft 43. One end of the first connecting frame 41 is rotatably connected to the hanging shaft 32 in the adjacent moving part 30, and the other end of the first connecting frame 41 is rotatably connected to the front end of the swing arm 42; the positioning shaft 43 is inserted in the middle of the swing arm 42, and the two ends of the positioning shaft 43 are respectively fixedly connected to the two opposite side walls of the base 10. When the swing arm 42 deflects with the positioning shaft 43 as the rotation center axis, the first connecting frame 41 can be used to be driven by the swing arm 42 to move, so that the moving part 30 is driven to slide by the first connecting frame 41. The first connecting frame 41 can move through the guide groove 21. The first extension frame 421 is formed on the facing sides of the swing arms 42 in the two sets of drive connection components, and the second extension frame 422 is formed at the rear ends of the swing arms 42 in the two sets of drive connection components. The adjacent ends of the two first extension frames 421 are rotatably connected to a second connection frame 44, and the front ends of the two second connection frames 44 are rotatably connected to the sliding sleeve 46. The sliding sleeve 46 is slidably sleeved on the outer side of the base shaft 47, and the front end of the base shaft 47 is fixedly connected to the back side of the guide part 20, so that when the two sets of drive connection components can slide along the base shaft 47 using the sliding sleeve 46, the two second connection frames 44 can symmetrically deflect and move, so that the two swing arms 42 can symmetrically deflect. Under the symmetrical deflection action of the two swing arms 42, the two moving parts 30 can simultaneously move longitudinally toward or away from each other. The adjacent ends of the two second extension frames 422 are rotatably connected to a movable button 45, and the driving source 48 is disposed between the two movable buttons 45, and the top of the driving source 48 and its output end are respectively connected and fixed to the facing surfaces of the two movable buttons 45, and the driving source 48 can be a power source such as a hydraulic cylinder, a pneumatic cylinder or an electric push rod, which has an output end that can be extended and moved along the axial direction of the cylinder body. When the output end of the driving source 48 extends outward along the axial direction of the cylinder body, the two moving parts 30 can move toward each other; when the output end of the driving source 48 retracts inward along the axial direction of the cylinder body, the two moving parts 30 can move away from each other.

[0027] See also Figure 6The clamping part 50 includes a connecting block 51, a limiting block 52, and a number of clamping part fixing holes 53 equal to the number of connecting holes 33. The limiting block 52 is formed on the front side of the connecting block 51, and a plurality of clamping part fixing holes 53 are formed on the front side of the limiting block 52 and penetrate the limiting block 52 and the connecting block 51. When installing the clamping part 50, the clamping part fixing holes 53 can be aligned with the connecting holes 33, and then the bolts are passed through the clamping part fixing holes 53 and tightened with the connecting holes 33 to complete the fixation. The connecting block 51 is slidably set in the movable groove 11, the limiting block 52 is located on the front side of the movable groove 11, and the limiting block 52 can be of a size that matches the diameter of the end of the screw to clamp and fix it.

[0028] The system of the present invention may further include a control system for controlling the operation of the driving source to automatically fix the screw rod. It should be understood that the control system has no particular limitation and can be implemented by the control technology under the prior art, which will not be described in detail here.

[0029] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A screw raceway three-coordinate measurement and positioning device, comprising a base (10), characterized in that: The invention also comprises a guide portion (20), two moving portions (30), a driving portion (40) and two clamping portions (50), wherein the guide portion (20) is fixed to the inner front side of the base (10), the two moving portions (30) are located on the same vertical plane and are slidably arranged on the guide portion (20) driven by the driving portion (40), a clamping portion (50) is detachably mounted and fixed on the front side of each moving portion (30), and the front ends of the two clamping portions (50) are both extended to the outside of the base (10), The driving portion (40) comprises two groups of symmetrical driving connection components, the driving connection components comprising a first connecting frame (41), a swing arm (42) and a positioning shaft (43), one end of the first connecting frame (41) is rotatably connected to an adjacent moving portion (30), the other end of the first connecting frame (41) is rotatably connected to a front end of the swing arm (42), the positioning shaft (43) is inserted in the middle of the swing arm (42), and the two ends of the positioning shaft (43) are respectively fixedly connected to opposite side walls of the base (10).

2. The screw raceway three-coordinate measurement and positioning device according to claim 1, characterized in that: The driving portion (40) further comprises two second connecting frames (44), a sliding sleeve (46) and a base shaft (47); first extension frames (421) are formed on opposite sides of the swing arms (42) in the two sets of the driving connection components; adjacent ends of the two first extension frames (421) are respectively rotatably connected to a second connecting frame (44); front ends of the two second connecting frames (44) are rotatably connected to the sliding sleeve (46); the sliding sleeve (46) is slidably mounted on the outside of the base shaft (47); and the front end of the base shaft (47) is fixedly connected to the back side of the guide portion (20).

3. The screw raceway three-coordinate measurement and positioning device according to claim 2, characterized in that: The driving portion (40) further comprises two movable buttons (45) and a driving source (48); the rear ends of the swing arms (42) in the two sets of the driving connection assemblies are each formed with a second extension frame (422); the adjacent ends of the two second extension frames (422) are each rotatably connected to a movable button (45); the driving source (48) is arranged between the two movable buttons (45); and the top of the driving source (48) and its output end are respectively connected and fixed to the facing surfaces of the two movable buttons (45).

4. The screw raceway three-coordinate measurement and positioning device according to claim 3, characterized in that: The driving source (48) is configured as a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

5. The screw raceway three-coordinate measurement and positioning device according to claim 3 or 4, characterized in that: A guide groove (21) is formed on the front surface of the guide portion (20), the guide groove (21) respectively passes through the top and bottom of the guide portion (20), and the first connecting frame (41) movably passes through the guide groove (21).

6. The screw raceway three-coordinate measurement and positioning device according to claim 5, characterized in that: Two lugs (31) are formed on one end of the movable portion (30) facing the driving connection assembly, a hanging shaft (32) fixed thereto is inserted between the two lugs (31), and the first connecting frame (41) is sleeved on the hanging shaft (32) and rotatably connected thereto.

7. The screw raceway three-coordinate measurement and positioning device according to claim 6, characterized in that: The movable portion (30) is formed with a plurality of connection holes (33) that match the clamping portion (50), and the connection holes (33) are configured as threaded holes.

8. The screw raceway three-coordinate measurement and positioning device according to claim 7, characterized in that: The clamping portion (50) comprises a connecting block (51), a limiting block (52), and a number of clamping portion fixing holes (53) equal to the number of connecting holes (33); the limiting block (52) is formed on the front side of the connecting block (51); and a plurality of clamping portion fixing holes (53) are formed on the front side of the limiting block (52) and penetrate the limiting block (52) and the connecting block (51).

9. The screw raceway three-coordinate measurement and positioning device according to claim 8, characterized in that: The front side of the base (10) is formed with a movable groove (11) communicating with the inner cavity thereof, the connecting block (51) is slidably arranged in the movable groove (11), and the limiting block (52) is located at the front side of the movable groove (11). An outer edge extension portion (12) is also formed on the outer edge of the base (10), and a plurality of base fixing holes (13) are formed on the outer edge extension portion (12).

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