A lathe eccentric fixture that is convenient for clamping

Abstract

The present invention relates to the technical field of lathe jigs, and proposes a lathe eccentric jig that is convenient for clamping, including a slide base, a slider slidably installed on the slide base, a flange fixedly installed at the upper end of the slider, and a three-jaw chuck fixedly installed at the upper end of the flange. An adjustable gauge block is arranged in the middle of one end of the slide base and the slider, and a locking screw rod is installed at the other end of the slide base and the slider. A calibration assembly is movably installed in the middle of the slide base, and a measuring rod is installed at the upper end of the calibration assembly. The measuring rod is perpendicular to the calibration assembly, and the measuring rod is installed between any two jaws of the three-jaw chuck. By providing a lathe eccentric jig with a simple structure and convenient clamping, the eccentric jig has the characteristics of quick clamping and disassembly, simplifies the clamping process of eccentric workpieces, enables operators to more easily complete eccentric machining tasks, realizes the adjustment of the eccentricity by the up and down movement of the slider on the slide base, and using the eccentric jig can greatly shorten the clamping time of workpieces.

Description

Technical Field

[0001] The present invention relates to the technical field of lathe fixtures, and particularly relates to a lathe eccentric fixture convenient for clamping. Background Technique

[0002] With the continuous improvement of the position accuracy and shape tolerance requirements of eccentric holes for eccentric sleeve parts and eccentric shaft hole parts, the requirements for workpiece fixtures on lathes are also getting higher and higher. The existing fixtures are too complex in design, with too many fixtures and positioning parts used. The assembly requirements between parts are high and difficult to meet. A large amount of time and manpower are required when replacing the parts to be processed. Moreover, in the field of machining, when using a lathe to perform turning operations on eccentric parts, it is necessary to use a three-jaw chuck or a four-jaw chuck to pre-correct the center of the eccentric parts in advance. This correction operation is rather cumbersome and difficult. For each eccentric part processed, repetitive correction operations must be carried out, resulting in low processing efficiency and being unsuitable for mass production.

[0003] Therefore, we make improvements on this and propose a lathe eccentric fixture convenient for clamping. Summary of the Invention

[0004] The purpose of the present invention is to provide a lathe eccentric fixture convenient for clamping to solve the problems raised in the above background technique.

[0005] To achieve the above-mentioned invention purpose, the present invention provides a lathe eccentric fixture convenient for clamping, which includes a sliding seat, a slider slidably installed on the sliding seat, a flange fixedly installed at the upper end of the slider, and a three-jaw chuck fixedly installed at the upper end of the flange. An adjustable measuring block is arranged in the middle of one end of the sliding seat and the slider; the adjustable measuring block includes a telescopic block, and the telescopic block includes two E-shaped cross blocks. A first flap is hinged to the outer side of one cross block, and a plurality of second needles are slidably connected to the first flap. A second flap is hinged to the outer side of the other cross block, and a plurality of first needles are slidably connected to the second flap; a locking screw rod is installed at the other end of the sliding seat and the slider, a calibration assembly is movably installed in the middle of the sliding seat, a measuring rod is installed at the upper end of the calibration assembly, the measuring rod is perpendicular to the calibration assembly, and the measuring rod is installed between any two jaws of the three-jaw chuck.

[0006] As a further scheme of the present invention, the sliding seat includes a base, a slideway is opened on the upper end surface of the base, a fixing plate is fixedly installed at one end of the slideway, an adjustment hole is opened in the middle of the base, and a positioning hole is centered at the bottom end of the adjustment hole.

[0007] As a further scheme of the present invention, the slider includes a convex platform, an offset hole is opened in the middle of the convex platform, and the offset hole is a waist-shaped hole with the same size as the adjustment hole.

[0008] As a further solution of the present invention, the measuring rod includes a cross bar, a pushing groove is formed in the middle of the cross bar, a pushing plate is slidably installed in the middle of the pushing groove, a first spring is connected to the outer ends of the pushing plate and the cross bar, graduations are arranged on the upper surface of the cross bar, and pointers matching the graduations are arranged on both sides of the pushing plate.

[0009] As a further solution of the present invention, the calibration component includes a column, an annular groove is formed at the bottom end of the column, a pressing block is sleeved on the annular groove, screws are rotatably connected to both sides of the pressing block, the bottom ends of the screws are threadedly connected to a sliding seat, a clamping sleeve is fixedly installed at the bottom end of the column, fixing pads are sleeved on both sides of the clamping sleeve, the fixing pads are fixedly connected to the sliding seat, and a second spring is fixedly connected between the upper ends of the fixing pads and the clamping sleeve.

[0010] As a further solution of the present invention, a positioning column is centrally installed inside the upper end of the column.

[0011] As a further solution of the present invention, the pressing block has the same height as the offset hole, and slopes are arranged on the shoulders on both sides of the pressing block.

[0012] As a further solution of the present invention, the telescopic block includes a first measuring block and a second measuring block which are cross-connected, bolts are fixedly connected to the middle of the first measuring block and the second measuring block respectively, and a double-headed nut is threadedly connected to both of the bolts at the same time; the first flap includes a semi-circular semi-circular plate, and a sliding groove is formed on the annular surface of the semi-circular plate.

[0013] As a further solution of the present invention, the first clamping pin includes a connecting block, the connecting block is slidably connected in the sliding groove, a sleeve is fixedly connected to the outer end of the connecting block, a screw rod is rotatably connected between the connecting block and the sleeve, a dial block is threadedly connected to the screw rod, a clamping block is installed at the upper end of the dial block, and the clamping block is slidably installed inside the sleeve; the centers of the second flap and the first flap are respectively aligned with the center of the product workpiece and the center of the eccentric hole.

[0014] The beneficial effects of the convenient clamping lathe eccentric fixture provided by the present invention are as follows:

[0015] 1. By providing a lathe eccentric fixture with a simple structure and convenient clamping, which is composed of a sliding seat, a sliding block, a locking lead screw, a flange, a three-jaw chuck, etc., the eccentric fixture has the characteristics of quick clamping and disassembly, simplifies the clamping process of eccentric workpieces, reduces the requirements for the technical level and experience of operators, enables operators to complete eccentric machining tasks more easily, reduces labor intensity, and realizes the adjustment of the eccentric distance by the up and down movement of the sliding block on the sliding seat, improves production efficiency. Compared with the traditional method of determining the eccentric position through multiple alignments and measurements, using the eccentric fixture can greatly shorten the clamping time of workpieces.

[0016] 2. A measuring rod and a calibration component are fixedly installed in the middle of the sliding seat. The bottom end of the calibration component is installed in a telescopic manner through a second spring. When a workpiece to be processed is placed at the upper end of the fixture, the workpiece presses down the measuring rod and the calibration component. The edge of the workpiece squeezes the push plate, and when the slider slides along the sliding seat and drives the workpiece to shift, it simultaneously pushes the push plate to slide on the cross bar. The eccentric distance is visually reflected by the difference in the readings of the graduations. After the workpiece is taken out, the second spring pushes the upright post and the pressing block to reset upward. The pressing block is reinserted into the offset hole, and the offset hole is moved to be vertically aligned with the adjustment hole. At this time, the flange and the three-jaw chuck installed at the upper end of the slider are calibrated, facilitating the processing of new workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of a lathe eccentric fixture convenient for clamping provided by the present application;

[0019] Figure 2 Exploded structural schematic diagram of a lathe eccentric fixture convenient for clamping provided by the present application;

[0020] Figure 3 Structural sectional view of a lathe eccentric fixture convenient for clamping provided by the present application;

[0021] Figure 4 Structural schematic diagram of the sliding seat of a lathe eccentric fixture convenient for clamping provided by the present application;

[0022] Figure 5 Structural schematic diagram of the slider of a lathe eccentric fixture convenient for clamping provided by the present application;

[0023] Figure 6 Structural schematic diagram of the measuring rod of a lathe eccentric fixture convenient for clamping provided by the present application;

[0024] Figure 7 Structural schematic diagram of the calibration component of a lathe eccentric fixture convenient for clamping provided by the present application;

[0025] Figure 8 Connection schematic diagram of the measuring rod and the calibration component of a lathe eccentric fixture convenient for clamping provided by the present application;

[0026] Figure 9Schematic diagram of the adjustable measuring block structure of a lathe eccentric fixture for convenient clamping provided by the present application;

[0027] Figure 10 Schematic diagram of the correspondence between the adjustable measuring block of a lathe eccentric fixture for convenient clamping provided by the present application and the centers of the product and the eccentric hole;

[0028] Figure 11 Schematic diagram of the telescopic block structure of a lathe eccentric fixture for convenient clamping provided by the present application;

[0029] Figure 12 Schematic diagram of the installation structure of the second flap and the first needle of a lathe eccentric fixture for convenient clamping provided by the present application.

[0030] In the figure: 1. Slide base; 11. Base; 12. Slideway; 13. Fixed plate; 14. Adjusting hole; 15. Positioning hole; 2. Slide block; 21. Boss; 22. Offset hole; 3. Flange; 4. Three-jaw chuck; 5. Locking screw rod; 6. Adjustable measuring block; 61. Telescopic block; 611. First measuring block; 612. Second measuring block; 613. Bolt; 614. Double-headed nut; 62. First flap; 63. Second flap; 631. Semi-circular plate; 632. Chute; 64. First needle; 641. Connecting block; 642. Screw rod; 643. Sleeve; 644. Pusher block; 645. Clamping block; 65. Second needle; 7. Measuring rod; 71. Cross bar; 72. Pushing groove; 73. Scale; 74. Pushing plate; 75. First spring; 76. Pointer; 8. Calibration assembly; 81. Column; 82. Positioning column; 83. Annular groove; 84. Casing; 85. Pressing block; 86. Screw; 87. Fixed pad; 88. Second spring. Detailed implementation manners

[0031] The following further describes in detail the specific implementation manners of the present invention in conjunction with the specification drawings and embodiments. The following embodiments are only used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] As Figures 1 - 12 shown, this embodiment provides a lathe eccentric fixture for convenient clamping, including a slide base 1, a slide block 2 slidably installed on the slide base 1, a flange 3 fixedly installed at the upper end of the slide block 2, and a three-jaw chuck 4 fixedly installed at the upper end of the flange 3. An adjustable measuring block 6 is arranged in the middle of one end of the slide base 1 and the slide block 2;

[0033] The adjustable measuring block 6 includes a telescopic block 61. The telescopic block 61 includes two E-shaped cross blocks. One cross block is hinged with a first flap 62 on its outer side, and a plurality of second needles 65 are slidably connected to the first flap 62. The other cross block is hinged with a second flap 63 on its outer side, and a plurality of first needles 64 are slidably connected to the second flap 63;

[0034] The other ends of the sliding seat 1 and the sliding block 2 are installed with a locking screw rod 5. A calibration component 8 is movably installed in the middle of the sliding seat 1. A measuring rod 7 is installed at the upper end of the calibration component 8. The measuring rod 7 is perpendicular to the calibration component 8, and the measuring rod 7 is installed between any two claws of the three-jaw chuck 4.

[0035] The sliding seat 1 includes a base 11. A slideway 12 is opened on the upper end surface of the base 11. A fixing plate 13 is fixedly installed at one end of the slideway 12. An adjusting hole 14 is opened in the middle of the base 11. A positioning hole 15 is opened in the middle at the bottom end of the adjusting hole 14. The hole of the fixing plate 13 is convenient for fixing the adjustable measuring block 6, avoiding the adjustable measuring block 6 being centrifugally thrown out during the machining of the workpiece due to rotation, facilitating the stability of the device. The positioning hole 15 and the adjusting hole 14 are used for installing the calibration component 8, facilitating the calibration component 8 to control the reset and calibration of the sliding block 2, the flange 3 and the three-jaw chuck 4, and facilitating the machining of subsequent other workpiece products.

[0036] The sliding block 2 includes a boss 21. An offset hole 22 is opened in the middle of the boss 21. The offset hole 22 is a waist-shaped hole with the same size as the adjusting hole 14. The boss 21 is slidably installed on the sliding seat 1. The sliding block 2 is slidably limited by the adjustable measuring block 6 to control the eccentric distance of the sliding block 2. The locking screw rod 5 is threadedly connected to the sliding seat 1 and the sliding block 2. By rotating the locking screw rod 5, the sliding block 2 is driven to perform precise sliding fine-tuning. The adjustment of the eccentric distance is realized by the up and down movement of the sliding block 2 on the sliding seat 1, facilitating the operator to more easily complete the eccentric machining task, reducing the labor intensity and improving the production efficiency.

[0037] The measuring rod 7 includes a cross bar 71. A push groove 72 is opened in the middle of the cross bar 71. A push plate 74 is slidably installed in the middle of the push groove 72. A first spring 75 is connected between the push plate 74 and the outer ends of the cross bar 71 on both sides. Scale marks 73 are arranged on the upper surface of the cross bar 71. Pointer 76 matching the scale marks 73 is arranged on both sides of the push plate 74. The cross bar 71 is installed at the upper end of the three-jaw chuck 4. In order to ensure that the measuring rod 7 does not tilt when the workpiece presses the measuring rod 7, the measuring rod 7 can also be arranged in a Y-shaped branch. One branch in the same direction as the sliding direction of the sliding block 2 is provided with a sliding push plate 74 to record the edge position of the workpiece, facilitating the convenient and quick comparison of whether the eccentric distance of the workpiece is accurate.

[0038] The calibration component 8 includes a column 81. An annular groove 83 is formed at the bottom end of the column 81. A pressing block 85 is sleeved and installed on the annular groove 83. Screws 86 are connected to both sides of the pressing block 85 in a rolling manner. The bottom ends of the screws 86 are threadedly connected to the sliding seat 1. A ferrule 84 is fixedly installed at the bottom end of the column 81. Fixing pads 87 are sleeved on both sides of the ferrule 84. The fixing pads 87 are fixedly connected to the sliding seat 1. A second spring 88 is fixedly connected between the upper end of the fixing pad 87 and the ferrule 84. The bottom of the column 81 can cooperate with the second spring 88 to move the pressing block 85 in and out of the offset hole 22 through the tightening and loosening of the threads of the screws 86, thereby calibrating the slider 2 and avoiding the problem that the second spring 88 lacks sufficient elasticity to reset.

[0039] A positioning post 82 is centrally installed inside the upper end of the column 81. The positioning post 82 is centrally installed at the upper end of the sliding seat 1, which is convenient for central positioning.

[0040] The pressing block 85 has the same height as the offset hole 22, and slopes are provided on both shoulders of the pressing block 85. When the pressing block 85 is inside the adjustment hole 14, the slider 2 can slide along the sliding seat 1, so as to adjust the eccentricity of the flange 3, the three-jaw chuck 4 and the product workpiece clamped at the upper end that are fixedly connected to the slider 2. After the workpiece is processed, the pressing block 85 can reset and calibrate the slider 2 under the upward push of the second spring 88.

[0041] The telescopic block 61 includes a first measuring block 611 and a second measuring block 612 that are cross-connected. Bolts 613 are fixedly connected to the middle of the first measuring block 611 and the second measuring block 612 respectively. A double-headed nut 614 is threadedly connected to both bolts 613 at the same time; the first flap 62 includes a semi-circular plate 631. A chute 632 is formed on the circumferential surface of the semi-circular plate 631; the first needle 64 includes a connecting block 641. The connecting block 641 is slidably connected to the chute 632. A sleeve 643 is fixedly connected to the outer end of the connecting block 641. A screw 642 is rotatably connected between the connecting block 641 and the sleeve 643. A dial block 644 is threadedly connected to the screw 642. A clamping block 645 is installed at the upper end of the dial block 644. The clamping block 645 is slidably installed inside the sleeve 643; the centers of the second flap 63 and the first flap 62 are respectively aligned with the center of the product workpiece and the center of the eccentric hole.

[0042] The first measuring block 611 and the second measuring block 612 are cross-connected. Open and flatten the first flap 62 and the second flap 63 on both sides of the first measuring block 611 and the second measuring block 612. Adjust the lengths of the three first pins 64 according to the radius length of the workpiece. The two first pins 64 at both ends and the first pin 64 in the middle of the second flap 63 are simultaneously clamped on the outer circumferential contour of the product workpiece. Therefore, the middle part of the outer edge of the second flap 63 is positioned at the center of the product. Similarly, use the multiple second pins 65 connected to the first flap 62 to position the center of the inner circumference of the eccentric hole on the product workpiece, and position the middle part of the outer edge of the first flap 62 on the eccentric hole of the product workpiece. At this time, the overall thickness of the telescopic block 6, the first flap 62, and the second flap 63 is consistent with the eccentricity of the eccentric hole on the product workpiece. Tighten the two bolts 613 of the first measuring block 611 and the second measuring block 612 through the double-headed nut 614 to fix the adjustable measuring block 6. Then, turn the first flap 62 and the second flap 63 to both sides of the telescopic block 6 and place the whole between the fixed plate 13 and the slider 2 to quickly position the slider 2. Use the up and down movement of the slider 2 on the slide base 1 to adjust the eccentricity, improving the production efficiency. Compared with the traditional method of determining the eccentric position through multiple alignments and measurements, using the eccentric fixture can greatly shorten the clamping time of the workpiece.

[0043] The thickness of the adjustable measuring block 6 is customized according to the size of the eccentricity of the eccentric hole on the product workpiece. By precisely customizing the thickness of the adjustable measuring block 6 and using the up and down movement of the slider 2 on the slide base 1 to adjust the eccentricity, the production efficiency is improved, enabling the three-jaw chuck 4 to more easily complete the eccentric machining task after clamping the product, reducing the requirements for the technical level and experience of the operator, and reducing the labor intensity.

[0044] The pressing block 85 has the same height as the offset hole 22, and slopes are provided on both shoulders of the pressing block 85. When the pressing block 85 is inside the adjusting hole 14, the slider 2 can slide along the slide base 1, enabling the flange 3, the three-jaw chuck 4, and the product workpiece clamped at the upper end connected and fixed to the slider 2 to adjust the eccentricity. After the workpiece machining is completed, the pressing block 85 can reset and correct the slider 2 under the upward push of the second spring 88.

[0045] Specifically, when the conveniently clampable lathe eccentric fixture is in use: By setting up a lathe eccentric fixture with a simple structure for convenient clamping, which consists of a slide base 1, a slider 2, a locking screw rod 5, a flange 3, a three-jaw chuck 4, etc., the eccentric fixture has the characteristics of quick clamping and disassembly, simplifies the clamping process of eccentric workpieces, reduces the requirements for the technical level and experience of operators, enables operators to complete eccentric machining tasks more easily, reduces labor intensity, and uses the up and down movement of the slider 2 on the slide base 1 to adjust the eccentricity, improving production efficiency. Compared with the traditional method of determining the eccentric position through multiple alignments and measurements, using an eccentric fixture can greatly shorten the clamping time of workpieces; By fixedly installing a measuring rod 7 and a calibration assembly 8 in the middle of the slide base 1, the bottom end of the calibration assembly 8 is telescopically installed through a second spring 88. When a workpiece to be processed is placed at the upper end of the fixture, the workpiece presses down the measuring rod 7 and the calibration assembly 8. The edge of the workpiece squeezes the push plate 74, and as the slider 2 slides along the slide base 1 driving the workpiece to offset, it simultaneously pushes the push plate 74 to slide on the cross bar 71, and the eccentric distance is visually reflected by the reading difference of the scale 73. When the workpiece is removed, the second spring 88 pushes the upright column 81 and the pressing block 85 to reset upward. The pressing block 85 is reinserted into the offset hole 22, moving the offset hole 22 to be vertically aligned with the adjustment hole 14. At this time, the flange 3 and the three-jaw chuck 4 installed at the upper end of the slider 2 are calibrated, facilitating the processing of new workpieces. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0046] The above embodiments are only used to illustrate the present invention and not to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should all be covered within the scope of the claims of the present invention.

Claims

1. A lathe eccentric fixture that is convenient for clamping, comprising a slide base (1), a slider (2) slidably mounted on the slide base (1), a flange (3) fixedly mounted on the upper end of the slider (2), and a three-jaw chuck (4) fixedly mounted on the upper end of the flange (3), characterized in that: An adjustable gauge block (6) is arranged in the middle of one end of the sliding seat (1) and the sliding block (2); The adjustable gauge block (6) includes a telescopic block (61). One side of the telescopic block (61) is hinged with a first flap (62). A plurality of second pins (65) are slidably connected to the first flap (62). The other side of the telescopic block (61) is hinged with a second flap (63). A plurality of first pins (64) are slidably connected to the second flap (63); A locking screw rod (5) is installed at the other end of the sliding seat (1) and the sliding block (2). A calibration assembly (8) is movably installed in the middle of the sliding seat (1). A measuring rod (7) is installed at the upper end of the calibration assembly (8). The measuring rod (7) is perpendicular to the calibration assembly (8), and the measuring rod (7) is installed between any two claws of the three-jaw chuck (4); The measuring rod (7) includes a cross bar (71). A push groove (72) is opened in the middle of the cross bar (71). A push plate (74) is slidably installed in the middle of the push groove (72). A first spring (75) is connected to the outer ends of the push plate (74) and the cross bar (71). Scale marks (73) are arranged on the upper surface of the cross bar (71). Pointers (76) matching the scale marks (73) are arranged on both sides of the push plate (74); The calibration assembly (8) includes a column (81). An annular groove (83) is opened at the bottom end of the column (81). A pressing block (85) is sleeved on the annular groove (83). Screws (86) are rotatably connected to both sides of the pressing block (85). The bottom ends of the screws (86) are threadedly connected to the sliding seat (1). A bushing (84) is fixedly installed at the bottom end of the column (81). Fixing pads (87) are sleeved on both sides of the bushing (84). The fixing pads (87) are fixedly connected to the sliding seat (1). A second spring (88) is connected between the upper end of the fixing pad (87) and the bushing (84); The first pin (64) includes a connecting block (641). The connecting block (641) is slidably connected in a chute (632). The outer end of the connecting block (641) is fixedly connected with a sleeve (643). A screw (642) is rotatably connected between the connecting block (641) and the sleeve (643). A dial block (644) is threadedly connected to the screw (642). A clamping block (645) is installed at the upper end of the dial block (644). The clamping block (645) is slidably installed inside the sleeve (643); The centers of the second flap (63) and the first flap (62) are respectively aligned with the center of the product workpiece and the center of the eccentric hole.

2. The convenient clamping lathe eccentric fixture according to claim 1, characterized in that: The sliding seat (1) includes a base (11). A slideway (12) is opened on the upper end surface of the base (11). A fixing plate (13) is fixedly installed at one end of the slideway (12). An adjusting hole (14) is opened in the middle of the base (11). A positioning hole (15) is centered at the bottom end of the adjusting hole (14).

3. The eccentric fixture for lathe that is convenient for clamping according to claim 1, wherein: The slider (2) includes a boss (21), and an offset hole (22) is formed in the middle of the boss (21). The offset hole (22) is an oblong hole having the same size as the adjustment hole (14).

4. A lathe eccentric fixture that is convenient for clamping according to claim 1, characterized in that: A positioning post (82) is centrally installed inside the upper end of the upright post (81).

5. A lathe eccentric fixture convenient for clamping according to claim 1, characterized in that: The pressing block (85) has the same height as the offset hole (22), and slopes are provided on both shoulders of the pressing block (85).

6. The convenient clamping lathe eccentric fixture according to claim 1, characterized in that: The telescopic block (61) includes a first measuring block (611) and a second measuring block (612) which are cross-connected. Bolts (613) are fixedly connected to the middles of the first measuring block (611) and the second measuring block (612) respectively. A double-headed nut (614) is screwed onto both of the bolts (613) simultaneously. The first flap (62) includes a semi-circular plate (631), and a sliding groove (632) is formed in the circumferential surface of the semi-circular plate (631).

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