Headstock chuck clamp

Abstract

The utility model belongs to lathe fixture technical field, especially point to a kind of headstock chuck clamp;Including headstock connecting seat, headstock clamp sliding seat, chuck connecting body, headstock chuck, quasi-stop bolt assembly, lifting drive component, scale component and limiting component, headstock connecting seat is provided with left sliding platform, right sliding platform, left pressure plate, right pressure plate are respectively provided with a pair of guide rail structures in the outside of left sliding platform, right sliding platform;Headstock clamp sliding seat is set between a pair of guide rail structures;Scale component includes scale set on left pressure or / and right pressure plate and vernier set on headstock clamp sliding seat and cooperating with scale;Quasi-stop bolt assembly and index slot are inserted to the headstock chuck and are limited in circumference;The utility model cooperates with scale component by lifting drive component, and the fine adjustment function of limiting component realizes the accurate adjustment and intuitive positioning of headstock chuck height, effectively improves the centring efficiency of workpiece.

Description

Technical Field

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

[0002] In the field of machining, especially in turning and grinding processes involving rotating parts such as shafts and discs, the headstock chuck is a key fixture component of the machine tool, and its positioning accuracy and stability directly determine the machining quality of the workpiece. Traditional machine tool headstock chucks are usually fixed in place, and their height and angle positions are difficult to adjust once set.

[0003] In actual production, especially in the machining of crankshaft parts, including main journals, connecting rod journals, and crank arms, traditional fixed headstock chucks struggle to accommodate the differences in center height among different journal sections during crankshaft machining, making precise eccentric alignment impossible. Furthermore, when indexing connecting rod journals or crank arm sides at different phases, the lack of efficient and accurate angular positioning forces operators to rely on tedious scribing for alignment, severely limiting machining efficiency and accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a headstock chuck clamp that is adjustable in height and angle and has precise positioning.

[0005] This utility model is implemented as follows: A headstock chuck clamp, comprising: The head frame connecting seat has parallel left and right slides on its front side, and left and right pressure plates are respectively set on the outer sides of the left and right slides to form a pair of guide rail structures. The headstock clamp slide is positioned between a pair of guide rail structures and can move up and down along the guide rail structures; The chuck connector is rotatably mounted on the headstock clamp slide, and the chuck connector has three or more indexing slots evenly distributed circumferentially. The headstock chuck is fixedly connected to the chuck connector and rotates together with the chuck connector; The stop pin assembly, mounted on the headstock clamp slide, engages with the indexing slot to circumferentially limit the movement of the headstock chuck. The lifting drive assembly includes an adjusting screw disposed on the head frame clamp slide and a lifting nut disposed on the head frame connecting seat. The axis of the adjusting screw is disposed along the sliding direction of the head frame clamp slide, and the adjusting screw and the lifting nut are threadedly engaged to drive the head frame 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 headstock clamp slide and engaging 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 headstock clamp slide. The left stop block and the right stop block are screwed with abutment screws that can abut against the corresponding lower stop block.

[0006] In the aforementioned headstock chuck fixture, a first connecting plate and a second connecting plate are evenly distributed around the outer circumference of the chuck connector. A T-shaped screw is connected to the first connecting plate. An annular groove is provided on the headstock fixture slide. The cross-sectional shape of the annular groove is adapted to the head of the T-shaped screw. The head of the T-shaped screw can rotate within the annular groove and axially limit the chuck connector. The second connecting plate is connected to the headstock chuck by fastening screws.

[0007] In the aforementioned headstock chuck fixture, an indexing block is provided between adjacent first and second connecting plates, and the two ends of the indexing block form indexing slots with the first and second connecting plates respectively.

[0008] In the aforementioned headstock chuck fixture, the center of the chuck connector has a rotating shaft, and the headstock fixture slide is provided with a mounting hole. The rotating shaft is rotatably mounted in the mounting hole on the headstock fixture slide via a bearing.

[0009] In the aforementioned headstock chuck fixture, 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 slide of the headstock fixture.

[0010] In the aforementioned headstock chuck fixture, the left and right slides are provided with slide adjustment pads on the sides adjacent to the headstock fixture slide.

[0011] In the headstock chuck fixture described above, the adjusting screw has an upper protruding edge and a lower protruding edge, and a support block groove is provided on the back of the headstock fixture slide. The support block is embedded in the support block groove and fixed to the headstock fixture slide by screws. The adjusting screw is inserted into the support block, and the upper and lower protruding edges are located on the upper and lower sides of the support block, respectively.

[0012] In the aforementioned headstock chuck fixture, the lifting nut has a plug-in shaft, a plug-in hole is provided on the headstock connecting seat, the plug-in shaft is inserted into the plug-in hole, and a step is provided on this side of the headstock connecting seat, with the lower end of the lifting nut abutting against the step.

[0013] In the aforementioned headstock chuck fixture, the quasi-stop pin assembly includes a pin seat mounted on the headstock fixture slide. A stepped hole with a first stepped surface is provided in the pin seat. The quasi-stop pin is a stepped shaft with a second stepped surface. The quasi-stop pin passes through the stepped hole, with one end extending out of the pin seat for insertion into the indexing slot and the other end provided with a handle. The other end of the quasi-stop pin is also provided with a limiting element. A spring is fitted on the quasi-stop pin between the first and second stepped surfaces, so that one end of the quasi-stop pin always has a tendency to extend outward.

[0014] In the head frame chuck clamp described above, a socket plate is fixedly provided on the back of the head frame connecting seat.

[0015] The outstanding advantages of this utility model compared to the prior art are: This invention utilizes a lifting drive assembly and a scale assembly to achieve precise adjustment and intuitive positioning of the headstock chuck height, effectively improving workpiece centering efficiency. The stop pin assembly, in conjunction with circumferentially distributed indexing slots, provides reliable angular indexing and circumferential locking functions for the headstock chuck, ensuring accuracy in multi-station machining. Furthermore, the guide rail structure and limit assembly ensure stability and accuracy during the adjustment process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 This is the front view of this utility model.

[0018] Figure 3 yes Figure 2 AA sectional view.

[0019] Figure 4 yes Figure 2 BB cross-sectional view.

[0020] Figure 5 yes Figure 2 CC section view.

[0021] Figure 6 This is a schematic diagram of the head frame connector of this utility model.

[0022] Figure 7 This is a front view of the head frame clamp slide of this utility model.

[0023] Figure 8 This is a schematic diagram of the back of the head frame clamp slide of this utility model.

[0024] Figure 9 This is a front view of the chuck connector of this utility model.

[0025] Figure 10This is a schematic diagram of the back of the chuck connector of this utility model.

[0026] Figure 11 This is a schematic diagram showing the adjusting screw of this utility model being mounted on the support block and screwed to the lifting nut.

[0027] In the diagram: 1. Headstock connecting seat; 2. Headstock clamp slide; 3. Chuck connector; 4. Headstock chuck; 5. Stop pin assembly; 6. Left slide; 7. Right slide; 8. Left pressure plate; 9. Right pressure plate; 10. Indexing slot; 11. Adjusting screw; 12. Lifting nut; 13. Vernier caliper; 14. Lower stop; 15. Left stop; 16. Right stop; 17. Abutment screw; 18. First connecting plate; 19. Second connecting plate 20. T-shaped screw; 21. Ring groove; 22. Fastening screw; 23. Rotating shaft; 24. Bearing; 25. Indexing block; 26. Slide block pressure block; 27. Slide adjusting pad; 28. Upper raised edge; 29. ​​Lower raised edge; 30. Support block groove; 31. Support block; 32. Insert shaft; 33. Insert hole; 34. Step; 35. Pin seat; 36. Pre-stop pin; 37. Handle; 38. Limiting element; 39. Insertion hole pattern plate. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —11: This utility model provides a head frame chuck clamp, which includes: a head frame connecting seat 1, a head frame clamp slide 2, a chuck connecting body 3, a head frame chuck 4, a stop pin assembly 5, a lifting drive assembly, a scale assembly, and a limit assembly.

[0029] Specifically, the head frame connecting seat 1 has parallel left slide 6 and right slide 7 on its front side, and left pressure plate 8 and right pressure plate 9 are respectively arranged on the outer side of the left slide 6 and right slide 7 to form a pair of guide rail structures. The head frame clamp slide 2 is arranged between the pair of guide rail structures and can move up and down along the guide rail structures.

[0030] Based on this, the chuck connector 3 is rotatably mounted on the headstock clamp slide 2, and the chuck connector 3 has three or more indexing slots 10 evenly distributed circumferentially. The headstock chuck 4 is fixedly connected to the chuck connector 3 and rotates together with the chuck connector 3. The quasi-stop pin assembly 5 is mounted on the headstock clamp slide 2 and is inserted into the indexing slots 10 to circumferentially limit the movement of the headstock chuck 3.

[0031] To achieve precise height control, the lifting drive assembly includes an adjusting screw 11 mounted on the headstock clamp slide 2 and a lifting nut 12 mounted on the headstock connecting seat 1. The axis of the adjusting screw 11 is arranged along the sliding direction of the headstock clamp slide 2. The adjusting screw 11 and the lifting nut 12 are threadedly engaged to drive the headstock clamp slide 2 to rise and fall. Simultaneously, to visually display the adjustment amount, the scale assembly includes graduations mounted on the left pressure plate 8 and / or the right pressure plate 9, and a vernier scale 13 mounted on the headstock clamp slide 2 that engages with the graduations. Furthermore, to ensure stability and prevent the headstock clamp slide 2 from sliding downwards during processing, the limiting assembly includes a lower stop block 14 mounted on the guide rail structure and a left stop block 15 and a right stop block 16 mounted on the headstock clamp slide 2. Abutment screws 17, which abut against the corresponding lower stop block 14, are screwed onto the left stop block 15 and the right stop block 16.

[0032] This invention achieves precise height adjustment and intuitive positioning of the headstock chuck 4 through the cooperation of a lifting drive assembly and a scale assembly, as well as the fine-tuning function of a limit assembly, effectively improving workpiece centering efficiency. The stop pin assembly 5, in conjunction with the circumferentially distributed indexing slots 10, provides reliable angular indexing and circumferential locking functions for the headstock chuck 4, ensuring the accuracy of multi-station machining. Furthermore, the guide rail structure and limit assembly ensure stability and accuracy during the adjustment process.

[0033] Furthermore, the outer circumference of the chuck connector 3 is evenly distributed with a first connecting plate 18 and a second connecting plate 19. A T-shaped screw 20 is connected to the first connecting plate 18. An annular groove 21 is provided on the headstock clamp slide 2. The cross-sectional shape of the annular groove 21 is adapted to the head of the T-shaped screw 20. The head of the T-shaped screw 20 can rotate in the annular groove 21 and axially limit the chuck connector 3. The second connecting plate 19 is connected to the headstock chuck 4 by fastening screws 22.

[0034] This invention, through the cooperation of the T-shaped screw 20 and the annular groove 21, allows the chuck connector 3 to rotate smoothly to achieve the indexing function while providing reliable axial limiting, effectively preventing axial movement during processing and ensuring the rotational accuracy and operational stability of the system. Furthermore, the second connecting plate 19, secured by screws 22, further achieves a rigid connection and power transmission between the chuck connector 3 and the headstock chuck 4, ensuring that the entire fixture maintains structural rigidity and connection reliability while possessing flexible indexing capabilities.

[0035] In this utility model, the center of the chuck connecting body 3 has a rotating shaft 23, and the head frame clamp slide 2 is provided with a mounting hole. The rotating shaft 23 is rotatably disposed in the mounting hole on the head frame clamp slide 2 through a bearing 24.

[0036] In this embodiment, twelve indexing slots 10 are provided, and indexing blocks 25 are provided between adjacent first connecting plates 18 and second connecting plates 19. The two ends of the indexing blocks 25 form indexing slots 10 with the first connecting plates 18 and second connecting plates 19 respectively.

[0037] In order to eliminate the gap between the left pressure plate 8, the right pressure plate 9 and the head frame clamp slide 2, the present invention provides one or more grooves on the left pressure plate 8 and the right pressure plate 9 respectively, and provides slide block 26 on the left pressure plate 8 and the right pressure plate 9 respectively, with one end of the slide block 26 passing through the groove and pressing on the head frame clamp slide 2.

[0038] In addition, the present invention also provides slide adjustment pads 27 on the sides of the left slide 6, right slide 7 and head frame clamp slide 2 adjacent to each other.

[0039] To enable the chuck connector 3 and the adjusting screw 11 to move up and down synchronously, the adjusting screw 11 has an upper protrusion 28 and a lower protrusion 29. The back of the head frame clamp slide 2 is provided with a support block groove 30. The support block 31 is embedded in the support block groove 30 and fixed to the head frame clamp slide with screws. The adjusting screw 11 is inserted into the support block 31 and the upper protrusion 28 and the lower protrusion 29 are located on the upper and lower sides of the support block 31, respectively.

[0040] Specifically, the lifting nut 12 of this utility model has a plug-in shaft 32, and a plug-in hole 33 is provided on the head frame connecting seat 1. The plug-in shaft 32 is inserted into the plug-in hole 33, and a step 34 is provided on this side of the head frame connecting seat 1. The lower end of the lifting nut 12 abuts against the step 34, and the step 34 can provide a certain support for the lifting nut 12.

[0041] In addition, the quasi-stop pin assembly 5 includes a pin seat 35 mounted on the headstock clamp slide 2. A stepped hole with a first stepped surface is provided in the pin seat 35. The quasi-stop pin 36 is a stepped shaft with a second stepped surface. The quasi-stop pin 36 passes through the stepped hole, and one end of it extends out of the pin seat 35 for insertion into the indexing slot 10. The other end is provided with a handle 37. The other end of the quasi-stop pin 37 is also provided with a limiting member 38. A spring is fitted on the quasi-stop pin 36 between the first stepped surface and the second stepped surface so that one end of the quasi-stop pin 36 always has a tendency to extend outward.

[0042] When adjusting the angle, pull the handle 37 to separate the stop pin 36 from the indexing slot 10, rotate the headstock chuck 4 to the desired position, and then insert the stop pin 36 into the corresponding indexing slot 10.

[0043] The headstock connecting seat 1 of this utility model has a socket plate 39 fixedly provided on its back. The socket plate 39 is a standardized interface that can be directly and quickly locked to the end of the machine tool spindle (or transition plate) with bolts.

[0044] Taking crankshaft machining as an example, the working principle of this utility model is as follows: When grinding crankshaft connecting rod journals, the operator first rotates the adjusting screw 11 and makes fine adjustments by using the abutment screw 17. The height of the headstock chuck 4 is precisely adjusted according to the scale and vernier caliper 13 to make the center of the crankshaft connecting rod journal coincide with the rotation center of the headstock spindle. Subsequently, when grinding other connecting rod journals, the operator pulls the handle 37 of the stop pin assembly 5 to separate the stop pin 36 from the indexing slot 10. Then, the operator rotates the headstock chuck 4 (driving the crankshaft) to a predetermined angle (for example, from connecting rod journal No. 1 to connecting rod journal No. 2). At this time, the stop pin 36 will automatically spring into the new indexing slot 10 under the action of spring force, precisely locking the crankshaft circumferentially and ensuring the accuracy of the indexing angle between each connecting rod journal.

[0045] 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 headstock chuck clamp, characterized in that: include: The head frame connecting seat (1) has a parallel left slide (6) and right slide (7) on its front side. A left pressure plate (8) and a right pressure plate (9) are respectively provided on the outside of the left slide (6) and right slide (7) to form a pair of guide rail structures. The head frame clamp slide (2) is located between a pair of guide rail structures and can move up and down along the guide rail structures; The chuck connector (3) is rotatably mounted on the headstock clamp slide (2), and the chuck connector (3) has three or more indexing slots (10) evenly distributed around its circumference. The head frame chuck (4) is fixedly connected to the chuck connector (3) and rotates together with the chuck connector (3); The stop pin assembly (5) is mounted on the headstock clamp slide (2) and is inserted into the indexing slot (10) to circumferentially limit the headstock chuck (4). The lifting drive assembly includes an adjusting screw (11) disposed on the head frame clamp slide (2) and a lifting nut (12) disposed on the head frame connecting seat (1). The axis of the adjusting screw (11) is disposed along the sliding direction of the head frame clamp slide (2). The adjusting screw (11) and the lifting nut (12) are threadedly engaged to drive the head frame clamp slide (2) to lift. The scale assembly includes a scale set on the left pressure plate (8) and / or the right pressure plate (9) and a vernier scale (13) set on the head frame clamp slide (2) and cooperating with the scale. The limiting component includes a lower stop (14) disposed on the guide rail structure and a left stop (15) and a right stop (16) disposed on the head frame clamp slide (2). The left stop (15) and the right stop (16) are screwed with abutting screws (17) that can abut against the corresponding lower stop (14).

2. The headstock chuck clamp according to claim 1, characterized in that: The outer circumference of the chuck connector (3) is evenly distributed with a first connecting plate (18) and a second connecting plate (19). A T-shaped screw (20) is connected to the first connecting plate (18). An annular groove (21) is provided on the headstock clamp slide (2). The cross-sectional shape of the annular groove (21) is adapted to the head of the T-shaped screw (20). The head of the T-shaped screw (20) can rotate in the annular groove (21) and axially limit the chuck connector (3). The second connecting plate (19) is connected to the headstock chuck (4) by fastening screws (22).

3. The headstock chuck clamp according to claim 2, characterized in that: An indexing block (25) is provided between adjacent first connecting plate (18) and second connecting plate (19), and the two ends of the indexing block (25) form indexing slots (10) with the first connecting plate (18) and the second connecting plate (19) respectively.

4. The headstock chuck clamp according to claim 2, characterized in that: The chuck connector (3) has a rotating shaft (23) at its center. The head frame clamp slide (2) is provided with a mounting hole. The rotating shaft (23) is rotatably mounted in the mounting hole on the head frame clamp slide (2) via a bearing (24).

5. A headstock chuck clamp according to any one of claims 1-4, characterized in that: The left pressure plate (8) and the right pressure plate (9) are respectively provided with one or more grooves, and the left pressure plate (8) and the right pressure plate (9) are respectively provided with slide block (26), and one end of the slide block (26) passes through the groove and presses onto the head frame clamp slide (2).

6. A headstock chuck clamp according to any one of claims 1-4, characterized in that: The left slide (6), right slide (7) and head frame clamp slide (2) are provided with slide adjustment pads (27) on their sides.

7. A headstock chuck clamp according to claim 1, characterized in that: The adjusting screw (11) has an upper protrusion (28) and a lower protrusion (29). The back of the head frame clamp slide (2) is provided with a support block groove (30). The support block (31) is embedded in the support block groove (30) and fixed to the head frame clamp slide (2) by screws. The adjusting screw (11) is inserted into the support block (31) and the upper protrusion (28) and lower protrusion (29) are located on the upper and lower sides of the support block (31) respectively.

8. A headstock chuck clamp according to claim 1 or 7, characterized in that: The lifting nut (12) has a plug shaft (32), and a plug hole (33) is provided on the head frame connecting seat (1). The plug shaft (32) is inserted into the plug hole (33), and a step (34) is provided on the side of the head frame connecting seat (1) where the lifting nut (12) is installed. The lower end of the lifting nut (12) abuts against the step (34).

9. A headstock chuck clamp according to claim 1, characterized in that: The quasi-stop pin assembly (5) includes a pin seat (35) mounted on the headstock clamp slide (2). A stepped hole with a first stepped surface is provided in the pin seat (35). The quasi-stop pin (36) is a stepped shaft with a second stepped surface. The quasi-stop pin (36) passes through the stepped hole, and one end of it extends out of the pin seat (35) to be inserted into the indexing slot (10). The other end is provided with a handle (37). The other end of the quasi-stop pin (36) is also provided with a limiting member (38). A spring is fitted on the quasi-stop pin (36) between the first stepped surface and the second stepped surface so that one end of the quasi-stop pin (36) always has a tendency to extend outward.

10. A headstock chuck clamp according to claim 1, characterized in that: The back of the head frame connector (1) is fixed with a grommets (39).

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