Tailstock chuck

Abstract

The utility model belongs to cutting processing equipment technical field, especially point to a tailstock chuck, including tailstock connecting seat, its front surface is equipped with left slide platform, right slide platform, sets up left pressure plate, right pressure plate on the outside of left slide platform, right slide platform and constitutes a pair of guide rail structure, tailstock clamp sliding seat can move up and down along the guide rail structure, lifting drive subassembly, including adjusting screw rod and lifting nut, adjusting screw rod and lifting nut thread cooperation drives tailstock clamp sliding seat to go up and down, caliper assembly, including setting on left pressure plate or / and right pressure plate on the scale and setting on tailstock clamp sliding seat on vernier caliper, limiting component, including setting on guide rail structure on lower stop and setting on tailstock clamp sliding seat on left stop, right stop, left stop, right stop on the threaded connection has the abutting screw rod on the abutment on lower stop, the utility model discloses through lifting drive subassembly realizes the lifting of tailstock clamp sliding seat, sets up caliper assembly and makes operator can directly, accurate reading displacement, realizes visual positioning.

Description

Technical Field

[0001] This utility model belongs to the field of machine tool fixture technology, and specifically refers to a tailstock chuck. Background Technology

[0002] In the field of machining, the tailstock chuck is a key component ensuring workpiece positioning accuracy and machining stability. The CNC crankshaft lathe fixture disclosed in publication number CN 112705747 A, while including a tailstock with a second chuck, a second mandrel, a second indexing plate, and a fourth balance block, can achieve installation and positioning through the cooperation of the second mandrel with the lathe tailstock. It can adapt to the machining of crankshafts with varying cylinder counts using the indexing adjustment of the second indexing plate, and can assist in machining specific crankshaft specifications through counterweight optimization using the fourth balance block. However, it still has significant shortcomings in practical applications, making it difficult to meet diverse and high-precision machining needs: this tailstock structure lacks a dedicated height adjustment mechanism; its overall position depends entirely on the fixed installation relationship between the second mandrel and the lathe tailstock. Once installed, it cannot flexibly adjust the tailstock support height according to the differences in machining datum for different crankshaft models or the different requirements of different processes (such as connecting rod journal machining and crank arm machining). Summary of the Invention

[0003] The purpose of this invention is to provide a tailstock chuck with flexible height adjustment and precise displacement control and reading.

[0004] This utility model is implemented as follows: A tail carriage chuck, comprising: The tailstock connecting seat has parallel left and right slides on its front side, and left and right pressure plates are set on the outside of the left and right slides to form a pair of guide rail structures. A tailstock clamp slide is disposed between a pair of guide rail structures and can move up and down along the guide rail structures. The tailstock clamp slide includes a sliding seat and a tailstock clamp located on the sliding seat. The lifting drive assembly includes an adjusting screw disposed on the tailstock connecting seat and a lifting nut disposed on the tailstock connecting seat. The adjusting screw and the lifting nut are threadedly engaged to drive the tailstock clamp slide to lift. The scale assembly includes a scale set on the left pressure plate and / or the right pressure plate and a vernier scale set on the tailstock clamp slide and cooperating with the scale; The limiting component includes a lower stop block disposed on the guide rail structure and a left stop block and a right stop block disposed on the tailstock clamp slide block, wherein the left stop block and the right stop block are screwed with abutting screws that can abut against the corresponding lower stop block.

[0005] In the aforementioned tailstock chuck, the tailstock clamp includes an upper pressure block and a clamping body. The clamping body is spaced apart from the sliding seat by a connecting arm. An upward-facing notch is provided on the clamping body, and a lower pressure block is provided inside the notch. One end of the upper pressure block is hinged to the clamping body, and the other end is detachably and fixedly connected to the clamping body by a fastener. The upper pressure block and the lower pressure block work together to press the workpiece.

[0006] In the aforementioned tailstock chuck, the fasteners are a tension bolt and a lock nut. The tension bolt has a mounting portion and a screw portion located on the mounting portion. The screw portion extends out of the clamping body. The other end of the upper pressure block is provided with an opening groove for the screw portion to enter. The screw portion enters the opening groove and extends out of the upper pressure block, and is locked by the lock nut.

[0007] In the aforementioned tailstock chuck, the working surface of the lower pressure block is a V-groove, the upper pressure block is a V-shaped pressure block, and a tightening bolt for tightening the workpiece is screwed onto the top of the upper pressure block.

[0008] In the aforementioned tailstock chuck, the left pressure plate and the right pressure plate are each provided with one or more grooves, and the left pressure plate and the right pressure plate are each provided with a slide block, with one end of the slide block passing through the groove and pressing onto the tailstock clamp slide.

[0009] In the aforementioned tailstock chuck, the left slide, the right slide, and the side adjacent to the tailstock clamp slide are provided with slide adjustment pads.

[0010] In the aforementioned tailstock chuck, the adjusting screw has an upper convex edge and a lower convex edge, a support block is embedded in the tailstock clamp slide, a U-shaped groove is provided on the support block, the adjusting screw is inserted into the U-shaped groove, and the upper convex edge and the lower convex edge are respectively located on the upper and lower sides of the support block.

[0011] In the aforementioned tailstock chuck, the lifting nut has a plug-in shaft, a plug-in hole is provided on the tailstock connecting seat, the plug-in shaft is inserted into the plug-in hole, and a step is provided on this side of the tailstock connecting seat, with the lower end of the lifting nut abutting against the step.

[0012] In one of the tailstock chucks described above, a slotted disc is fixedly provided on the back of the tailstock connecting seat.

[0013] The outstanding advantages of this utility model compared to the prior art are: 1. This utility model uses a lifting drive assembly to raise and lower the tailstock clamp slide, and utilizes a double guide rail structure consisting of a slide table and a pressure plate to ensure smooth movement and overall rigidity. The included scale assembly allows the operator to directly and accurately read the displacement using the scale and vernier caliper, achieving visual positioning. After adjustment, the limiting assembly, through the abutment screw and the lower stop block, effectively locks the slide position, preventing displacement during processing.

[0014] 2. This utility model significantly improves the coaxiality and clamping efficiency of workpiece processing, and is especially suitable for precision machining sites that require repeated positioning. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention with the workpiece clamped in place.

[0016] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0017] Figure 3 This is a three-dimensional schematic diagram of the present invention.

[0018] Figure 4 This is the front view of this utility model.

[0019] Figure 5 yes Figure 4 AA sectional view.

[0020] Figure 6 This is a front perspective view of the tailstock clamp slide of this utility model.

[0021] Figure 7 This is a three-dimensional view of the back of the tailstock clamp slide of this utility model.

[0022] Figure 8 This is a schematic diagram of the tailstock connecting seat of this utility model.

[0023] Figure 9 This is a schematic diagram of the adjusting screw of this utility model connected to the support block and the lifting nut.

[0024] In the diagram: 1. Tailstock connecting seat; 2. Tailstock clamp slide; 3. Left slide; 4. Right slide; 5. Left pressure plate; 6. Right pressure plate; 7. Slide seat; 8. Adjusting screw; 9. Lifting nut; 10. Vernier caliper; 11. Lower stop block; 12. Left stop block; 13. Right stop block; 14. Abutment screw; 15. Upper pressure block; 16. Clamp body; 17. Connecting arm; 18. Lower pressure block; 19. Lower adjusting shim; 20. Side adjusting shim; 21. Machining part; 22. Tensioning bolt; 23. Locking nut; 24. Top bolt; 25. Slide seat pressure block; 26. Upper flange; 27. Lower flange; 28. Support block groove; 29. ​​Support block; 30. Insert shaft; 31. Insert hole; 32. Step; 33. Insert hole disc; 34. Lifting ring; 35. Connecting rod; 36. Slide table adjusting shim. Detailed Implementation

[0025] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —9: This utility model provides a tailstock chuck, which includes: a tailstock connecting seat 1, a tailstock clamp slide 2, a lifting drive assembly, a scale assembly, and a limiting assembly. The tailstock connecting seat 1 has parallel left and right slides 3 and 4 on its front side. A left pressure plate 5 and a right pressure plate 6 are arranged on the outer sides of the left and right slides 3 and 4, forming a pair of guide rail structures. The tailstock clamp slide 2 is disposed between the pair of guide rail structures and can move up and down along the guide rail structures. The tailstock clamp slide 2 includes a sliding seat 7 and a tailstock clamp located on the sliding seat 7. The lifting drive assembly includes an adjusting screw 8 disposed on the tailstock connecting seat 1 and a lifting nut 9 disposed on the tailstock connecting seat 1. The adjusting screw 8 and the lifting nut 9 are threadedly engaged to drive the tailstock clamp slide 2 to rise and fall. To enable the operator to directly and accurately read the displacement, this invention also includes a scale assembly. The scale assembly includes a scale on the left pressure plate 5 and / or the right pressure plate 6, and a vernier scale 10 on the tailstock clamp slide 2 that mates with the scale. After adjustment, the corresponding height is limited by a limiting assembly. The limiting assembly includes a lower stop 11 on the guide rail structure and a left stop 12 and a right stop 13 on the tailstock clamp slide 2. The left stop 12 and right stop 13 are screwed with abutment screws 14 that abut against the corresponding lower stop 11.

[0026] This invention utilizes a lifting drive assembly to raise and lower the tailstock fixture slide 2. A double-guide rail structure consisting of a slide table and a pressure plate ensures smooth movement and overall rigidity. A scale assembly allows the operator to directly and accurately read displacement values ​​using the scale and vernier caliper 10, enabling visual positioning. After adjustment, the limiting assembly abuts against the lower stop 11 via the abutment screw 14, effectively locking the slide position and preventing displacement during machining. The abutment screw 14 allows for fine-tuning of the height of the tailstock fixture slide 2. This invention significantly improves the coaxiality and clamping efficiency of workpiece machining, making it particularly suitable for precision machining applications requiring repeated positioning.

[0027] Furthermore, the tailstock clamp includes an upper pressure block 15 and a clamping body 16. The clamping body 16 is spaced apart from the sliding seat 7 via a connecting arm 17. An upward-facing notch is provided on the clamping body 16, and a lower pressure block 18 is provided inside the notch. A lower adjusting pad 19 is provided between the lower pressure block 18 and the bottom surface of the notch, and a side adjusting pad 20 is provided between the lower pressure block 18 and the two side walls of the notch. One end of the upper pressure block 15 is hinged to the clamping body 16, and the other end is detachably fixed to the clamping body 16 via fasteners. The upper pressure block 15 and the lower pressure block 18 cooperate to press down the workpiece 21.

[0028] The tailstock clamp achieves rapid clamping and stable holding of the workpiece 21 by engaging the hinged upper pressure block 15 with the lower pressure block 18 located within the notch of the clamp body 16. The lower adjustment shim 19 allows for precise control of the center height of the workpiece 21, while the side adjustment shim 20 allows for fine adjustment of the lateral position of the lower pressure block 18, eliminating clearances and adapting to the production needs of workpieces of different specifications.

[0029] In this embodiment, the hinge connection between one end of the upper pressure block 15 and the clamping body 16 adopts the following structure: a groove is provided on the clamping body 16, one end of the connecting rod 35 is provided in the groove and is hinged to the clamping body through the first hinge shaft, and the other end of the connecting rod is hinged to one end of the upper pressure block 15 through the second hinge shaft.

[0030] Specifically, the fasteners are a tension bolt 22 and a lock nut 23. The tension bolt 22 has a mounting portion and a threaded portion located on the mounting portion. The threaded portion extends out of the clamping body 16. The other end of the upper pressure block 15 is provided with an opening groove for the threaded portion to enter. The threaded portion enters the opening groove and extends out of the upper pressure block 15, and is locked by the lock nut 23. This configuration eliminates the need to completely detach the lock nut 23 from the tension bolt 22, improving the efficiency of disassembly and assembly.

[0031] It should be noted that the working surface of the lower pressure block 18 is a V-groove, and the upper pressure block 15 is a V-shaped pressure block. A tightening bolt 24 for tightening the workpiece is screwed onto the top of the upper pressure block 15. The two V-shaped structures cooperate to naturally position the axis of the cylindrical workpiece to a specific position, ensuring the consistency of the rotation center. The tightening bolt 24 applies a huge downward pressure directly from the top, which is equivalent to adding a "braking" force to the workpiece 21. Together with the friction force provided by the V-groove, it completely locks the workpiece 21.

[0032] In order to eliminate the gap between the sliding seat 7 and the left pressure plate 5 and the right pressure plate 6, one or more grooves are provided on the left pressure plate 5 and the right pressure plate 6 respectively. Slide seat pressure blocks 25 are provided on the left pressure plate 5 and the right pressure plate 6 respectively, and one end of the slide seat pressure block 25 passes through the groove and presses onto the sliding seat 7 of the tailstock clamp slide seat 2.

[0033] In order to reduce the gap between the sliding seat 7 and the left slide 3 and right slide 4, the left slide 3 and right slide 4 of this utility model are provided with slide adjustment pads 36 on the side adjacent to the sliding seat 7 of the tailstock clamp slide 2.

[0034] The adjusting screw 8 of this utility model has an upper protruding edge 26 and a lower protruding edge 27. The tailstock clamp slide 2 is provided with a support block groove 28, and a support block 29 is embedded in the support block groove 28. The support block 29 is provided with a U-shaped groove, and the adjusting screw 8 is inserted into the U-shaped groove. The upper protruding edge 26 and the lower protruding edge 27 are located on the upper and lower sides of the support block 29, respectively. The lifting nut 9 has a plug-in shaft 30. The tailstock connecting seat 1 is provided with a plug-in hole 31, and the plug-in shaft 30 is inserted into the plug-in hole 31. A step 32 is provided on this side of the tailstock connecting seat 1, and the lower end of the lifting nut 9 abuts against the step 31.

[0035] During adjustment, rotating the adjusting screw 8 causes the tailstock clamp slide 2 to rise and fall synchronously with the adjusting screw 8 under the action of the support block 29, the upper convex edge 26, and the lower convex edge 27.

[0036] In addition, a socket plate 33 is fixedly provided on the back of the tailstock connecting seat 1. The socket plate 33 is a standardized interface that can be directly and quickly locked to the end of the machine tool spindle (or transition plate) with bolts.

[0037] To facilitate hoisting, this utility model provides a lifting ring 34 on the insert flower plate 33.

[0038] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A tail carriage chuck, characterized in that: include: The tail frame connecting seat (1) has a parallel left slide (3) and right slide (4) on its front side. A left pressure plate (5) and a right pressure plate (6) are set on the outside of the left slide (3) and right slide (4) to form a pair of guide rail structures. Tailstock clamp slide (2), which is disposed between a pair of guide rail structures and can move up and down along the guide rail structures, the tailstock clamp slide (2) includes a sliding seat (7) and a tailstock clamp located on the sliding seat (7); The lifting drive assembly includes an adjusting screw (8) disposed on the tailstock connecting seat (1) and a lifting nut (9) disposed on the tailstock connecting seat (1). The adjusting screw (8) and the lifting nut (9) are threadedly engaged to drive the tailstock clamp slide (2) to lift. The scale assembly includes a scale set on the left pressure plate (5) and / or the right pressure plate (6) and a vernier scale (10) set on the tailstock clamp slide (2) and cooperating with the scale. The limiting component includes a lower stop (11) disposed on the guide rail structure and a left stop (12) and a right stop (13) disposed on the tailstock clamp slide (2). The left stop (12) and the right stop (13) are screwed with abutting screws (14) that can abut against the corresponding lower stop (11).

2. The tail carriage chuck according to claim 1, characterized in that: The tailstock clamp includes an upper pressure block (15) and a clamp body (16). The clamp body (16) is spaced apart from the sliding seat (7) by a connecting arm (17). An upward-facing notch is provided on the clamp body (16), and a lower pressure block (18) is provided in the notch. One end of the upper pressure block (15) is hinged to the clamp body (16), and the other end is detachably fixed to the clamp body (16) by a fastener. The upper pressure block (15) and the lower pressure block (18) work together to press the workpiece (21).

3. A tail carriage chuck according to claim 2, characterized in that: The fasteners are a tension bolt (22) and a lock nut (23). The tension bolt (22) has a mounting part and a screw part located on the mounting part. The screw part extends out of the clamping body (16). The other end of the upper pressure block (15) is provided with an opening groove for the screw part to enter. The screw part enters the opening groove and extends out of the upper pressure block (15), and is locked by the lock nut (23).

4. A tail carriage chuck according to claim 2, characterized in that: The working surface of the lower pressure block (18) is a V-shaped groove, and the upper pressure block (15) is a V-shaped pressure block. A tightening bolt (24) for tightening the workpiece is screwed onto the top of the upper pressure block (15).

5. A tail carriage chuck according to claim 1, characterized in that: The left pressure plate (5) and the right pressure plate (6) are respectively provided with one or more grooves. The left pressure plate (5) and the right pressure plate (6) are respectively provided with slide block (25), and one end of the slide block (25) passes through the groove and presses onto the tailstock clamp slide (2).

6. A tail carriage chuck according to claim 1, characterized in that: The left slide (3), right slide (4) and tailstock clamp slide (2) are provided with slide adjustment pads (36) on their adjacent sides.

7. A tail carriage chuck according to claim 1, characterized in that: The adjusting screw (8) has an upper convex edge (26) and a lower convex edge (27). A support block (29) is embedded in the tailstock clamp slide (2). A U-shaped groove is provided on the support block (29). The adjusting screw (8) is inserted into the U-shaped groove, and the upper convex edge (26) and the lower convex edge (27) are located on the upper and lower sides of the support block (29), respectively.

8. A tail carriage chuck according to claim 1, characterized in that: The lifting nut (9) has a plug shaft (30), and a plug hole (31) is provided on the tail frame connecting seat (1). The plug shaft (30) is inserted into the plug hole (31), and a step (32) is provided on the side of the tail frame connecting seat (1) where the lifting nut (9) is installed. The lower end of the lifting nut (9) abuts against the step (32).

9. A tail carriage chuck according to claim 1, characterized in that: The tail frame connector (1) is fixed with a grommets (33) on its back.

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