A self-centering, rapid clamping gear clamp

Abstract

This utility model provides a self-centering quick-clamping gear clamp, including a middle clamp with a central cavity, an upper clamp coaxially mounted on the middle clamp, a centering hole coaxially mounted at the center of the upper clamp, multiple guide pin holes on the top surface of the upper clamp, a rotating slide pin slidably mounted on the guide pin holes, a plug on the top surface of the rotating slide pin, a locking hole on the side wall of the plug, a pressure claw on the top of the rotating slide pin, a insertion hole for insertion into the plug, a guide groove and a guide rod hole sequentially formed on the wall of the insertion hole, a locking buckle slidably mounted in the guide groove for insertion into the locking hole, and a screw penetrating the guide rod hole on the end face of the locking buckle facing the guide rod hole. This self-centering quick-clamping gear clamp has the advantage of easy replacement of the pressure claw.

Description

Technical Field

[0001] This utility model relates to the technical field of gear clamps, and in particular to a self-centering, fast-clamping gear clamp. Background Technology

[0002] Gear chucks are devices used to position and clamp gear workpieces during gear turning. They can ensure that the workpiece is in the correct position during gear turning, so that the cutting tool can cut the gear according to the design requirements, thus ensuring the final machining accuracy.

[0003] The existing Chinese patent with authorization announcement number CN215880198U discloses a gear clamping fixture for thin-walled parts, including a worktable and a chuck. A fixing hole is provided on the worktable, and an expansion sleeve is provided in the fixing hole. The expansion sleeve is used to radially clamp the parts. The expansion sleeve is provided with a fixing groove for clamping the parts. A shim is provided in the fixing hole. The tension of the expansion sleeve is adjusted by adjusting the thickness of a single shim or by adjusting the number of shims.

[0004] The chuck is used for axial positioning of parts. The chuck is connected to the worktable via a tie rod. The chuck and tie rod are threaded together. The worktable has a positioning hole for connecting the tie rod. The distance between the chuck and the worktable is adjusted by adjusting the length of the tie rod in the positioning hole. The tie rod is threaded together with the worktable and the chuck.

[0005] The existing technical solutions described above have the following drawbacks: In the aforementioned gear-turning fixture, one end of the pull rod is threaded to the worktable via a positioning hole, while the other end is threaded to the chuck. When the chuck needs to be replaced due to damage or excessive wear, the operation process is significantly inconvenient: the worker must first fix the pull rod to prevent it from rotating with the chuck, and then remove it from the pull rod by rotating the chuck multiple times; when installing a new chuck, the same procedure applies—the pull rod must be stabilized first, and then the assembly is completed through multiple rotations. This operating method makes the chuck disassembly and replacement process cumbersome and inefficient. Utility Model Content

[0006] The problem this utility model aims to solve is to provide a self-centering quick clamping gear clamp that addresses the aforementioned shortcomings in the prior art, thereby solving the problem of cumbersome chuck disassembly and replacement in the prior art.

[0007] The above-mentioned utility model objective is achieved through the following technical solution: a self-centering quick-clamping gear clamp, comprising a middle clamping seat with a seat cavity in the middle, an upper clamping seat coaxial with the middle clamping seat, a centering hole coaxial with the upper clamping seat at the center of the upper clamping seat, a plurality of guide post holes on the top surface of the upper clamping seat, a rotating slide post slidably disposed on the guide post holes, a plug disposed on the top surface of the rotating slide post, a locking hole disposed on the side wall of the plug, a pressure claw disposed on the top of the rotating slide post, the pressure claw having an insertion hole for insertion into the plug, a guide buckle groove and a guide rod hole sequentially disposed outward on the hole wall of the insertion hole, a locking buckle slidably disposed in the guide buckle groove for insertion into the locking hole, and a screw penetrating the guide rod hole disposed on the end face of the locking buckle facing the guide rod hole.

[0008] The present invention is further configured such that: a push spring is sleeved on the screw, one end of the push spring abuts against the locking buckle, and the other end abuts against the groove wall of the guide buckle groove, and the push spring pushes the locking buckle to insert into the locking hole.

[0009] The present invention is further configured such that a nut is threadedly connected to the end of the screw that passes through the guide rod hole.

[0010] The present invention is further configured such that: a driving mechanism for driving the rotating slide column to slide axially is provided in the seat cavity, the driving mechanism includes a pull plate and a pull rod, the pull plate is slidably disposed in the seat cavity, the pull plate is connected to the bottom of the rotating slide column, and the pull rod is coaxially connected to the pull plate.

[0011] The present invention is further configured such that: the bottom of the rotating slide column is rotatably connected to the pull plate; a spiral groove is provided on the surface of the rotating slide column; a threaded hole is provided on the side wall of the upper clamp; a limit screw is threadedly connected to the threaded hole; the spiral groove at the end of the limit screw is slidably engaged; when the rotating slide column slides axially, the spiral groove and the limit screw cooperate to drive the rotating slide column to produce angular rotation.

[0012] The present invention is further configured such that the rotation angle of the spiral groove is 90°.

[0013] The present invention is further configured such that: a through-shaft hole is provided on the pull plate, the bottom of the rotating slide column passes through the through-shaft hole, and a nut is threadedly connected to the bottom of the rotating slide column, the nut being used to axially limit the rotating slide column.

[0014] The present invention is further configured such that: an upper bearing is provided above the pull plate, the upper bearing is sleeved on the rotating shaft, and the rotating slide column presses the upper bearing tightly onto the pull plate.

[0015] The present invention is further configured such that: a lower bearing is provided below the pull plate, the lower bearing is sleeved on the rotating shaft, and the nut presses the lower bearing tightly onto the pull plate.

[0016] The present invention is further configured such that: a central hole is provided through the center of the pull plate, the pull rod passes through the central hole coaxial with it, and a connecting plate connected to the top surface of the pull plate is provided at the upper end of the pull rod.

[0017] In summary, the beneficial technical effects of this utility model are as follows:

[0018] (1) The worker pulls the screw and locking buckle with the nut, so that the locking buckle is pulled out of the locking hole and slides into the guide groove. At this time, the pressure claw is removed. Then the worker pulls the screw and locking buckle with the nut, so that the locking buckle is kept in the state of being retracted into the guide groove. At this time, the push spring is in the compressed state. Then the worker installs the pressure claw on the plug through the insertion hole. Then the worker rotates the pressure claw until the locking hole is aligned with the guide groove. The push spring pushes the locking buckle to insert into the locking hole. At this time, the pressure claw is fixedly installed on the top of the rotating slide column. This self-centering quick clamping gear clamp has the advantage of simple pressure claw replacement.

[0019] (2) This self-centering quick clamping gear clamp drives the rotating slide column to slide axially through the drive mechanism. When the rotating slide column slides axially, the limit screw and the spiral groove cooperate to make the rotating slide column rotate 90°. Then the rotating slide column drives the pressure claw to spiral down inward or spiral up outward, thereby quickly clamping or quickly loosening the flange. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the internal gear ring in this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the self-centering rapid clamping gear clamp in this utility model;

[0022] Figure 3 This is a cross-sectional view of the self-centering rapid clamping gear clamp of this utility model;

[0023] Figure 4 This is a schematic diagram of the rotating sliding column and pressure claw in this utility model;

[0024] Figure 5 This is a partial cross-sectional view of the rotating slide and pressure claw in this utility model.

[0025] In the above attached figures: 1. Gear ring body; 2. Flange; 3. Lower clamp; 4. Middle clamp; 5. Upper clamp; 6. Centering hole; 7. Seat cavity; 8. Side hole; 9. Through rod hole; 10. Guide post hole; 11. Rotating slide column; 12. Plug; 13. Locking hole; 14. Pressure claw; 15. Insertion hole; 16. Guide groove; 17. Guide rod hole; 18. Locking buckle; 19. Screw; 20. Nut; 21. Push spring; 22. Pull plate; 23. Center hole; 24. Through shaft hole; 25. Rotating shaft; 26. Upper bearing; 27. Lower bearing; 28. Nut; 29. ​​Pull rod; 30. Connecting plate; 31. Spiral groove; 311. Upper groove; 312. Spiral transition groove; 313. Lower groove; 32. Threaded hole; 33. Limiting screw. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this utility model clearer and easier to understand, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1 As shown, an internal gear ring includes a gear ring body 1 and a flange 2 fixed to the outer circular surface of the gear ring body 1.

[0028] like Figure 2 As shown, this utility model proposes a self-centering rapid clamping gear clamp, including a lower clamp 3, a middle clamp 4, an upper clamp 5, and a driving mechanism. The lower clamp 3, the middle clamp 4, and the upper clamp 5 are coaxial, and the central axis of the lower clamp 3, the middle clamp 4, and the upper clamp 5 is the positioning center of this self-centering rapid clamping gear clamp.

[0029] like Figure 2 and 3 As shown, the upper clamp 5 is disc-shaped and screwed to the top surface of the middle clamp 4. A centering hole 6 is provided at the center of the top surface of the upper clamp 5. The centering hole 6 is circular and coaxial with the upper clamp 5. The center of the centering hole 6 is aligned with the positioning center of this gear-turning fixture. The centering hole 6 is inserted into the bottom of the gear ring body 1, and is used for radial positioning of the gear ring body 1. During operation, the worker inserts the bottom of the gear ring body 1 into the centering hole 6, and the center of the internal gear ring automatically and precisely aligns with the positioning center of the gear-turning fixture. This demonstrates the workpiece self-centering function of this self-centering, quick-clamping gear-turning fixture.

[0030] like Figure 2 and 3As shown, the cross-section of the middle clamp 4 is annular, and the hollow part of the middle clamp 4 is the seat cavity 7. Four side holes 8 are provided at the bottom of the outer wall of the middle clamp 4, and these four side holes 8 are equidistantly distributed in a circle, communicating with the seat cavity 7. The lower clamp 3 is disc-shaped and is screwed to the bottom surface of the middle clamp 4. A rod-through hole 9, which is circular, is provided through the center of the lower clamp 3.

[0031] like Figure 2 and 3 As shown, four guide pin holes 10 are equidistantly arranged on the top surface of the upper clamping seat 5. The guide pin holes 10 are connected to the seat cavity 7 and are circular holes. A rotating slide pin 11 is slidably arranged in each guide pin hole 10. A cylindrical plug 12 is coaxially arranged on the top of the rotating slide pin 11. A locking hole 13 is opened on the side wall of the plug 12 and is circular.

[0032] like Figure 4 and 5 As shown, a pressure claw 14 is provided on the top of the rotating slide column 11. The pressure claw 14 achieves axial positioning of the internal gear ring by pressing the flange 2 of the internal gear ring. A through hole 15 is provided on the pressure claw 14 along the thickness direction. The through hole 15 is inserted into the plug 12. A guide groove 16 and a guide rod hole 17 are provided outwardly on the hole wall of the through hole 15. The guide groove 16 is a circular groove and the guide rod hole 17 is a circular hole.

[0033] like Figure 4 and 5 As shown, a locking buckle 18 is slidably disposed within the guide groove 16. The locking buckle 18 is a hemispherical cylinder that can be inserted into the locking hole 13. A screw 19 is fixedly connected to the end face of the locking buckle 18 facing the guide rod hole 17. The screw 19 passes through the guide rod hole 17, and a nut 20 is threadedly connected to the end of the screw 19 that passes through the guide rod hole 17. The nut 20 provides a force point for the worker to pull the screw 19 and the locking buckle 18. A push spring 21 is sleeved on the screw 19. One end of the push spring 21 abuts against the locking buckle 18, and the other end abuts against the groove wall of the guide groove 16. The push spring 21 is used to push the locking buckle 18 into the locking hole 13.

[0034] In this embodiment, the detailed disassembly and assembly process of the pressure claw 14 is as follows: The worker pulls the screw 19 and the locking buckle 18 through the nut 20, causing the locking buckle 18 to be pulled out of the locking hole 13 and slide into the guide groove 16. At this time, the pressure claw 14 is removed. Then, the worker pulls the screw 19 and the locking buckle 18 through the nut 20, keeping the locking buckle 18 in the retracted state of the guide groove 16. At this time, the push spring 21 is in a compressed state. Then, the worker installs the pressure claw 14 onto the plug 12 through the insertion hole 15. Then, the worker rotates the pressure claw 14 until the locking hole 13 is aligned with the guide groove 16. The push spring 21 pushes the locking buckle 18 into the locking hole 13. At this time, the pressure claw 14 is fixedly installed on the top of the rotating slide column 11. This self-centering quick-clamping gear clamp has the advantage of simple replacement of the pressure claw 14.

[0035] like Figure 3 As shown, the drive mechanism is used to drive the rotating slide column 11 to slide axially. The drive mechanism includes a pull plate 22 and a pull rod 29.

[0036] like Figure 3 As shown, the pull plate 22 is slidably disposed in the seat cavity 7 of the middle clamp 4. A central hole 23 is provided through the center of the pull plate 22. The central hole 23 is a circular hole. Four through holes 24 are provided at equal intervals around the outer side of the pull plate 22. The four through holes 24 are circular holes. The four through holes 24 are respectively aligned with four rotating slide columns 11. The bottom of the rotating slide column 11 is rotatably connected to the pull plate 22. A rotating shaft 25 is coaxially fixed to the bottom surface of the rotating slide column 11. The rotating shaft 25 passes through the through holes 24. The bottom of the outer wall of the rotating shaft 25 has external threads.

[0037] like Figure 3 As shown, an upper bearing 26 is provided above the pull plate 22, and the upper bearing 26 is sleeved on the rotating shaft 25. The rotating slide column 11 presses the upper bearing 26 tightly onto the pull plate 22. A lower bearing 27 is provided below the pull plate 22, and the lower bearing 27 is sleeved on the rotating shaft 25. The bottom of the rotating shaft 25 is connected to a nut 28 through an external thread. The nut 28 presses the lower bearing 27 tightly onto the pull plate 22. The nut 28 is used to axially limit the rotation of the slide column 11.

[0038] like Figure 3 As shown, the pull rod 29 passes through the through hole 9 and the center hole 23 sequentially from bottom to top. The pull plate 22 is coaxial with the lower clamping seat 3. The upper end of the pull rod 29 is fixedly connected to the connecting plate 30, which is screwed to the top surface of the pull plate 22. When this self-centering quick-clamping gear turning fixture is installed on a gear turning machine, the pull rod 29 is connected to the hydraulic cylinder on the gear turning machine. Driven by the hydraulic cylinder, the pull rod 29 makes a reciprocating linear motion up and down, which in turn drives the rotating slide column 11 to slide axially through the pull plate 22.

[0039] like Figure 3 and 4As shown, a spiral groove 31 is formed on the cylindrical surface of the rotating slide column 11. The spiral groove 31 includes an upper groove 311, a spiral transition groove 312, and a lower groove 313. The rotation angle of the spiral groove 31 is 90°. Four threaded holes 32 are equidistantly formed on the outer side wall of the upper clamp 5. Limiting screws 33 are threadedly connected to the threaded holes 32. The end of the limiting screw 33 near the rotating slide column 11 extends into the spiral groove 31, and the limiting screw 33 slides in engagement with the spiral groove 31. In the clamped state, the end of the limiting screw 33 is located in the upper groove 311; in the loosened state, the end of the limiting screw 33 is located in the lower groove 313.

[0040] In this embodiment, when the self-centering rapid clamping gear chuck is working: the worker inserts the bottom of the gear ring body 1 into the centering hole 6, and the center of the internal gear ring automatically and precisely aligns with the positioning center of the gear chuck. Then, the hydraulic cylinder of the gear turning machine pulls down the pull rod 29, and the pull rod 29 pulls the rotating slide column 11 downward axially through the pull plate 22. The spiral slide groove 31 and the limit screw 33 cooperate to drive the rotating slide column 11 to produce a 90° angular rotation. During this process, the rotating slide column 11 will drive the pressure claw 14 to spirally descend inward. The pressure claw 14 quickly clamps the flange 2 of the internal gear ring, realizing the axial positioning of the internal gear ring. Conversely, when the hydraulic cylinder of the gear turning machine pushes up, the rotating slide column 11 will drive the pressure claw 14 to spirally rise outward, and the pressure claw 14 quickly releases the axial positioning of the internal gear ring.

[0041] This self-centering quick-clamping gear clamp uses a drive mechanism to drive the rotating slide column 11 to slide axially. When the rotating slide column 11 slides axially, the limit screw 33 cooperates with the spiral groove 31 to make the rotating slide column 11 rotate 90°. Then the rotating slide column 11 drives the pressure claw 14 to spiral down inward or spiral up outward, thereby quickly clamping or quickly loosening the flange 2.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A self-centering, rapid clamping gear clamp, characterized in that, The system includes a middle clamp (4) with a central cavity (7), an upper clamp (5) coaxial with the middle clamp (4), a centering hole (6) coaxial with the upper clamp (5) at the center, multiple guide pin holes (10) on the top surface of the upper clamp (5), a rotating slide pin (11) slidably mounted on the guide pin holes (10), a plug (12) on the top surface of the rotating slide pin (11), and a locking hole (13) on the side wall of the plug (12). The top of the rotating slide column (11) is provided with a pressure claw (14), and the pressure claw (14) is provided with a plug hole (15) for insertion into the plug (12). The wall of the plug hole (15) is provided with a guide groove (16) and a guide rod hole (17) in sequence. A locking buckle (18) for insertion into the locking hole (13) is slidably provided in the guide groove (16). A screw (19) that passes through the guide rod hole (17) is provided on the end face of the locking buckle (18) facing the guide rod hole (17).

2. The self-centering quick-pressing gear fixture according to claim 1, wherein: A push spring (21) is fitted on the screw (19). One end of the push spring (21) abuts against the locking buckle (18), and the other end abuts against the groove wall of the guide groove (16). The push spring (21) pushes the locking buckle (18) to insert into the locking hole (13).

3. The self-centering quick-pressing gear fixture according to claim 1, wherein: The end of the screw (19) that passes through the guide rod hole (17) is threaded with a nut (20).

4. The self-centering quick-pressing gear hobbling fixture according to claim 1, wherein: The seat cavity (7) is provided with a driving mechanism for driving the rotating slide column (11) to slide axially. The driving mechanism includes a pull plate (22) and a pull rod (29). The pull plate (22) is slidably disposed in the seat cavity (7) and is connected to the bottom of the rotating slide column (11). The pull rod (29) is coaxially connected to the pull plate (22).

5. The self-centering quick-pressing gear hobbling fixture according to claim 4, wherein: The bottom of the rotating slide column (11) is rotatably connected to the pull plate (22). A spiral groove (31) is provided on the cylindrical surface of the rotating slide column (11). A threaded hole (32) is provided on the side wall of the upper clamp (5). A limit screw (33) is threadedly connected to the threaded hole (32). The spiral groove (31) at the end of the limit screw (33) is slidably engaged. When the rotating slide column (11) slides axially, the spiral groove (31) and the limit screw (33) cooperate to drive the rotating slide column (11) to rotate angularly.

6. A self-centering quick-pressing gear-clamp according to claim 5, characterized in that: The rotation angle of the spiral groove (31) is 90°.

7. The self-centering quick-pressing gear hobbling fixture according to claim 5, wherein: The pull plate (22) has a through hole (24), the bottom of the rotating slide column (11) passes through the through hole (24), and the bottom of the rotating slide column (11) is threaded with a nut (28), which is used to axially limit the rotating slide column (11).

8. The self-centering quick-pressing gear-clamp according to claim 7, wherein: An upper bearing (26) is provided above the pull plate (22), and the upper bearing (26) is sleeved on the rotating shaft (25). The rotating slide (11) presses the upper bearing (26) onto the pull plate (22).

9. The self-centering quick-pressing gear hobbling fixture according to claim 7, characterized in that: A lower bearing (27) is provided below the pull plate (22), and the lower bearing (27) is sleeved on the rotating shaft (25). The nut (28) presses the lower bearing (27) onto the pull plate (22).

10. The self-centering quick-pressing gear hobbling fixture according to claim 4, characterized in that: A center hole (23) is formed through the center of the pull plate (22), and the pull rod (29) passes through the center hole (23) coaxially. An upper end of the pull rod (29) is provided with a connecting plate (30) connected to a top surface of the pull plate (22).

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