Manual mechanical expansion turning clamp

Abstract

When a nut is rotated, the nut moves rightwards, so that a driving ring synchronously moves rightwards, a first expansion sleeve moves towards the interior of a workpiece, a second bevel edge and a first bevel edge are in contact and extruded, and the first expansion sleeve expands to preliminarily limit the workpiece; when the pressure in the first ventilation cavity is continuously increased, the sealing disc is pushed, gas is led to groove cavities of the second ventilation cavity and the fourth expansion sleeve, and finally the third expansion sleeve and the fourth expansion sleeve are in an expansion state. And then, conveying of the gas by the gas pump is canceled, the corrugated expansion sleeve is reset, and the third expansion sleeve is pulled towards the direction of the second positioning hole. The first spring pushes the sealing disc, so that gas cannot circulate between the first ventilation cavity and the second ventilation cavity. And when the third expansion sleeve moves towards the direction of the second positioning hole, the outer wall of the third expansion sleeve and the fourth expansion sleeve pull the workpiece, so that the workpiece leans against the left, and the purpose of further locking the workpiece is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle expansion clamps, in particular to a manual mechanical vehicle expansion clamp. Background Art

[0002] The machine tool expansion fixture is an indispensable industrial equipment, which directly affects the processing accuracy of the workpiece, labor productivity, manufacturing cost of the product, etc.

[0003] In the mass production of mechanical manufacturing, a stable expansion clamp can ensure the quality of product processing, improve production efficiency, expand the scope of application of machine tools, reduce production costs, and reduce the labor intensity of workers. The existing manual mechanical internal expansion clamp stabilizes the workpiece through an expansion sleeve, and the stabilization method is relatively simple. When processing the workpiece, the expansion sleeve and the workpiece are prone to looseness, causing errors in the workpiece processing size and easily causing damage to the workpiece. Therefore, the workpiece needs to be stably clamped. Utility Model Content

[0004] In order to solve the problem that the workpiece is easily loosened due to the relatively single method of stabilizing the workpiece proposed in the above background technology, the utility model provides the following technical solutions:

[0005] A manual mechanical lathe expansion fixture comprises a fixture body for positioning a workpiece;

[0006] A first expansion sleeve for locking the workpiece is installed at the right end of the clamp body, and a driving ring for limiting the first expansion sleeve is installed on the left side of the first expansion sleeve.

[0007] A nut is installed on the left side of the driving ring to cooperate with the clamp body to control the driving ring to move rightward.

[0008] An expansion component for further stabilizing the workpiece is installed in the middle of the right side of the clamp body.

[0009] The right outer wall of the clamp body is provided with a first bevel, the inner wall of the first expansion sleeve is provided with a second bevel, and the nut cooperates with the driving ring to control the second bevel and the first bevel to be squeezed.

[0010] The expansion assembly includes a second expansion sleeve, a third expansion sleeve and a fourth expansion sleeve for further stabilizing the workpiece.

[0011] Furthermore, a positioning column is provided in the middle of the workpiece, and a positioning hole 1 is opened in the middle of the positioning column.

[0012] Furthermore, a threaded end for guiding the nut is provided in the middle of the clamp body, a positioning hole No. 2 for positioning the workpiece is provided in the middle of the right side of the clamp body, and the positioning column is retracted in the middle of the cavity of the positioning hole No. 2, and a vent hole No. 1 is provided in the middle of the clamp body for facilitating the delivery of gas to the interior of the expansion assembly.

[0013] Furthermore, a limiting ring is installed on the left inner wall of the first expansion sleeve to cooperate with the driving ring to limit the first expansion sleeve, and a limiting groove is opened on the right outer wall of the driving ring to limit the limiting ring.

[0014] Furthermore, a corrugated expansion sleeve is provided at the right end of the second expansion sleeve for controlling the extension and retraction of the third expansion sleeve, and a first ventilation cavity is provided inside the second expansion sleeve, and the first ventilation cavity is in communication with the ventilation hole.

[0015] Furthermore, a second ventilation cavity is provided inside the third expansion sleeve, and the second ventilation cavity is connected to the first ventilation cavity. A plurality of ventilation holes 2 for conveying gas to the interior of the fourth expansion sleeve are provided on the right side of the third expansion sleeve, and one end of the ventilation hole 2 is connected to the second ventilation cavity, and the other end of the ventilation hole 2 is connected to the fourth expansion sleeve.

[0016] Furthermore, a fixing ring is installed at the left end of the cavity body of the second ventilation cavity, a sliding groove is opened on the inner wall of the fixing ring, and the inner wall of the groove of the sliding groove is inclined, an annular spring piece is installed in the middle of the groove of the sliding groove, and a sealing disk for blocking gas is slidably connected in the groove of the sliding groove.

[0017] Furthermore, a connecting tube is installed on the inner wall of the groove cavity of the second ventilation cavity, and a ventilation hole three is opened inside the connecting tube for gas circulation, and the ventilation hole three is connected to the second ventilation cavity, and a spring one is sleeved on the outside of the connecting tube for controlling the sealing disk to move to the left.

[0018] Furthermore, a deflation component for opening and closing the air vent three is installed in the middle of the connecting tube, and the deflation component includes a push rod, a baffle for sealing the air vent three is installed on the left side of the push rod, a sealing gasket for preventing gas leakage is installed on the right side of the baffle, a push block for facilitating pushing the push rod is installed on the right end of the push rod, and a spring two for controlling the push rod to move to the right is installed on the right side of the push rod.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] When the workpiece needs to be clamped, the nut is rotated, and the nut moves to the right, causing the driving ring to move to the right synchronously, so that the first expansion sleeve moves toward the inside of the workpiece, and the second bevel and the first bevel are contacted and squeezed, so that the first expansion sleeve expands to initially limit the workpiece. When the pressure in the first ventilation chamber continues to increase, the sealing disk is pushed, and the gas flows to the second ventilation chamber and the groove cavity of the fourth expansion sleeve, and finally the third expansion sleeve and the fourth expansion sleeve are in an expanded state. Subsequently, the gas delivery by the air pump is canceled, the corrugated expansion sleeve is reset, and the third expansion sleeve is pulled in the direction of the second positioning hole. The first spring pushes the sealing disk to prevent the gas from flowing between the first ventilation chamber and the second ventilation chamber. When the third expansion sleeve moves in the direction of the second positioning hole, the outer wall of the third expansion sleeve and the fourth expansion sleeve pull the workpiece, so that the workpiece is pressed to the left, thereby achieving the purpose of further locking the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the main body of the clamp of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first expansion sleeve of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the driving ring of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the expansion assembly of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the deflation component of the utility model.

[0027] In the accompanying drawings, the names of the components represented by the reference numerals are listed as follows:

[0028] 10-workpiece, 11-positioning column, 12-positioning hole 1;

[0029] 100-clamp body, 110-threaded end, 120-positioning hole 2, 130-vent hole 1, 140-first bevel;

[0030] 200-first expansion sleeve, 210-second bevel, 220-limiting ring;

[0031] 300-driving ring, 310-limiting groove;

[0032] 400-nut;

[0033] 500-expansion assembly, 510-second expansion sleeve, 511-corrugated expansion sleeve, 512-first ventilation chamber, 520-third expansion sleeve, 521-second ventilation chamber, 522-vent hole two, 530-fourth expansion sleeve, 540-fixing ring, 541-slide groove, 542-annular spring piece, 550-sealing disk, 560-spring one, 570-air release assembly, 571-push rod, 572-baffle, 573-sealing pad, 574-push block, 575-spring two, 580-connecting tube, 581-vent hole three. DETAILED DESCRIPTION

[0034] The preferred specific implementation methods for implementing the present utility model are described in detail below, and a clear and complete description is made in conjunction with the accompanying drawings.

[0035] See also Figure 1-Figure 6 The utility model provides a manual mechanical expansion clamp including a clamp body 100, a first expansion sleeve 200, a driving ring 300, a nut 400 and an expansion assembly 500, and the workpiece 10 is locked by the expansion of the first expansion sleeve 200 and the expansion assembly 500.

[0036] A positioning column 11 is fixedly provided in the middle of the workpiece 10 , a positioning hole 12 is opened in the middle of the positioning column 11 , and the expansion assembly 500 is expanded and contracted in the cavity of the positioning hole 12 .

[0037] The middle part of the clamp body 100 is provided with a threaded end 110 for guiding the nut 400. By setting the threaded end 110, when the nut 400 rotates, the nut 400 is controlled to move away from or close to the workpiece 10. The middle part of the right side of the clamp body 100 is provided with a positioning hole 120 for positioning the workpiece 10, and the positioning column 11 is extended and retracted in the middle of the cavity of the positioning hole 120. The middle part of the clamp body 100 is provided with a vent hole 130 for facilitating the delivery of gas to the inside of the expansion assembly 500. The left end of the vent hole 130 can be connected to the air pump, and the right end of the vent hole 130 is connected to the first ventilation cavity 512.

[0038] A first bevel 140 is provided on the right outer wall of the clamp body 100, and the nut 400 cooperates with the driving ring 300 to control the extrusion of the second bevel 210 and the first bevel 140, so that the clamp body 100 and the first expansion sleeve 200 are extruded to drive the first expansion sleeve 200 to expand, and the expanded first expansion sleeve 200 performs preliminary positioning of the workpiece 10.

[0039] The right end of the fixture body 100 is equipped with a first expansion sleeve 200 for locking the workpiece 10. The inner wall of the first expansion sleeve 200 is provided with a second bevel 210, so that when the second bevel 210 and the first bevel 140 are squeezed, the first expansion sleeve 200 is driven to expand and limit the workpiece 10. The first expansion sleeve 200 is located on the right side of the workpiece 10, and a limiting ring 220 is fixedly installed on the left inner wall of the first expansion sleeve 200 to cooperate with the driving ring 300 to limit the first expansion sleeve 200.

[0040] A driving ring 300 for limiting the first expansion sleeve 200 is installed on the left side of the first expansion sleeve 200, and a limiting groove 310 for limiting the limiting ring 220 is opened on the right end outer wall of the driving ring 300. A nut 400 for cooperating with the fixture body 100 to control the driving ring 300 to move to the right is installed on the left side of the driving ring 300. When the workpiece 10 needs to be clamped, the nut 400 is rotated, and the nut 400 moves to the right, so that the driving ring 300 moves to the right synchronously, so that the first expansion sleeve 200 moves toward the inside of the workpiece 10, and the second bevel 210 and the first bevel 140 are contacted and squeezed, so that the first expansion sleeve 200 expands to initially limit the workpiece 10.

[0041] An expansion assembly 500 is installed in the middle of the right side of the fixture body 100 for further stabilizing the workpiece 10. The expansion assembly 500 is fixedly installed on the left inner wall of the groove cavity of the second positioning hole 120. The expansion assembly 500 includes a second expansion sleeve 510, a third expansion sleeve 520 and a fourth expansion sleeve 530 for further stabilizing the workpiece 10.

[0042] The right end of the second expansion sleeve 510 is provided with a corrugated expansion sleeve 511 for controlling the extension and retraction of the third expansion sleeve 520. The interior of the second expansion sleeve 510 is provided with a first ventilation cavity 512, and the first ventilation cavity 512 is communicated with the ventilation hole 130. After the first expansion sleeve 200 performs preliminary positioning on the workpiece 10, the air pump controls the gas to move to the inner cavity of the first ventilation cavity 512 through the ventilation hole 130. When the gas is delivered to the groove cavity of the first ventilation cavity 512, since the right side of the first ventilation cavity 512 is blocked by the sealing disk 550, the continuously delivered gas drives the corrugated expansion sleeve 511 to deform, so that the angle between adjacent corrugated expansion sleeves 511 becomes larger, and the corrugated expansion sleeve 511 drives the third expansion sleeve 520 to move to the right side of the groove cavity of the positioning hole 12. Finally, the fourth expansion sleeve 530 passes through the cavity of the positioning hole 12 and is located on the right side of the workpiece 10.

[0043] A second ventilation cavity 521 is provided inside the third expansion sleeve 520, and the second ventilation cavity 521 is connected to the first ventilation cavity 512. A plurality of ventilation holes 522 for conveying gas to the interior of the fourth expansion sleeve 530 are provided on the right side of the third expansion sleeve 520, and one end of the ventilation hole 522 is connected to the second ventilation cavity 521, and the other end of the ventilation hole 522 is connected to the fourth expansion sleeve 530.

[0044] A fixing ring 540 is fixedly installed at the left end of the second ventilation cavity 521. The fixing ring 540 is a fixed ring and cannot be deformed. A slide groove 541 is provided on the inner wall of the fixing ring 540, and the inner wall of the groove cavity of the slide groove 541 is inclined. The left diameter of the groove cavity of the slide groove 541 is smaller than the right diameter of the groove cavity of the slide groove 541. When the spring 1 560 pushes the sealing disk 550 to the left side of the groove cavity of the slide groove 541, the gas is isolated and cannot reach the cavity of the second ventilation cavity 521.

[0045] An annular spring piece 542 is installed in the middle of the groove cavity of the slide groove 541, and a sealing disk 550 for blocking gas is slidably connected in the groove cavity of the slide groove 541. When the pressure in the first ventilation cavity 512 continues to increase, the sealing disk 550 is pushed, so that the sealing disk 550 squeezes the annular spring piece 542 to drive the annular spring piece 542 to deform, and finally the sealing disk 550 moves to the right side of the groove cavity of the slide groove 541, and the gas simultaneously moves into the groove cavity of the second ventilation cavity 521 through the gap between the sealing disk 550 and the slide groove 541, and the gas moves into the groove cavity of the fourth expansion sleeve 530 through the second ventilation cavity 521 and the second vent hole 522, and finally the third expansion sleeve 520 and the fourth expansion sleeve 530 are in an expanded state. Subsequently, the gas delivery by the air pump is canceled, and the gas in the first ventilation cavity 512 is dispersed through the ventilation hole 130, and the corrugated expansion sleeve 511 is reset, and the third expansion sleeve 520 is pulled in the direction of the positioning hole 2 120. When the pressure in the first ventilation cavity 512 is lower than the pressure in the second ventilation cavity 521, the spring 1 560 pushes the sealing disk 550, so that the sealing disk 550 isolates the first ventilation cavity 512 and the second ventilation cavity 521, so that the gas cannot flow between the first ventilation cavity 512 and the second ventilation cavity 521. When the third expansion sleeve 520 moves in the direction of the positioning hole 2 120, the outer wall of the third expansion sleeve 520 and the fourth expansion sleeve 530 pull the workpiece 10, so that the workpiece 10 is pressed to the left, thereby achieving the purpose of further locking the workpiece 10, making the workpiece more stable during processing.

[0046] A connecting tube 580 is fixedly mounted on the inner wall of the right side of the groove of the second ventilation cavity 521. A vent hole 3 581 is provided inside the connecting tube 580 for gas circulation. The vent hole 3 581 is connected to the second ventilation cavity 521. The right side of the vent hole 3 581 is connected to the outside of the third expansion sleeve 520 for easy exhaust. A spring 1 560 is provided on the outside of the connecting tube 580 for controlling the sealing disk 550 to move to the left.

[0047] A venting assembly 570 for opening and closing the air hole three 581 is installed in the middle of the connecting tube 580, and the venting assembly 570 includes a push rod 571, a baffle 572 for sealing the air hole three 581 is fixedly installed on the left side of the push rod 571, a sealing gasket 573 for preventing gas leakage is fixedly installed on the right side of the baffle 572, a push block 574 for pushing the push rod 571 is fixedly installed on the right end of the push rod 571, and a spring 2 575 for controlling the push rod 571 to move to the right is sleeved on the right side, and the spring 2 575 is located outside the third expansion sleeve 520.

[0048] When the workpiece 10 needs to be unlocked after processing, the push block 574 is pressed to make the baffle 572 drive the sealing gasket 573 away from the left side of the connecting tube 580, and the gas in the second ventilation cavity 521 and the fourth expansion sleeve 530 is exhausted through the ventilation hole three 581, and then the third expansion sleeve 520 and the fourth expansion sleeve 530 are reset to facilitate passing through the cavity of the positioning hole 12 and then rotating the nut 400 to make the nut 400 away from the driving ring 300. The reset of the first expansion sleeve 200 requires squeezing the inner wall of the workpiece 10 to release the lock on the workpiece 10, and then the workpiece 10 can be disassembled.

[0049] Based on the above content and the accompanying drawings, those skilled in the art can understand and implement the utility model. In addition, any non-creative modifications made to the utility model by those skilled in the art without making creative work still fall within the scope of protection of the utility model.

Claims

1. A manual mechanical expansion clamp, comprising a clamp body (100) for positioning a workpiece (10), Features: A first expansion sleeve (200) for locking the workpiece (10) is installed at the right end of the clamp body (100), and a driving ring (300) for limiting the position of the first expansion sleeve (200) is installed on the left side of the first expansion sleeve (200); A nut (400) is installed on the left side of the driving ring (300) for cooperating with the clamp body (100) to control the driving ring (300) to move rightward; An expansion assembly (500) for further stabilizing the workpiece (10) is installed in the middle of the right side of the clamp body (100); The right outer wall of the clamp body (100) is provided with a first bevel (140), the inner wall of the first expansion sleeve (200) is provided with a second bevel (210), and the nut (400) cooperates with the driving ring (300) to control the second bevel (210) and the first bevel (140) to be pressed against each other; The expansion assembly (500) comprises a second expansion sleeve (510), a third expansion sleeve (520) and a fourth expansion sleeve (530) for further stabilizing the workpiece (10).

2. A manual mechanical expansion clamp according to claim 1, Features: A positioning column (11) is provided in the middle of the workpiece (10), and a positioning hole (12) is opened in the middle of the positioning column (11).

3. A manual mechanical expansion clamp according to claim 2, Features: A threaded end (110) for guiding the nut (400) is provided in the middle of the clamp body (100), a second positioning hole (120) for positioning the workpiece (10) is provided in the middle of the right side of the clamp body (100), and the positioning column (11) is extended and retracted in the middle of the cavity of the second positioning hole (120), and a ventilation hole (130) is provided in the middle of the clamp body (100) for facilitating the delivery of gas to the interior of the expansion assembly (500).

4. A manual mechanical expansion clamp according to claim 1, Features: A limiting ring (220) is installed on the left inner wall of the first expansion sleeve (200) to cooperate with the driving ring (300) to limit the first expansion sleeve (200), and a limiting groove (310) is opened on the right outer wall of the driving ring (300) to limit the limiting ring (220).

5. A manual mechanical expansion clamp according to claim 3, Features: The right end of the second expansion sleeve (510) is provided with a corrugated expansion sleeve (511) for controlling the expansion and contraction of the third expansion sleeve (520), and the interior of the second expansion sleeve (510) is provided with a first ventilation cavity (512), and the first ventilation cavity (512) is communicated with the ventilation hole 1 (130).

6. A manual mechanical expansion clamp according to claim 5, Features: The third expansion sleeve (520) is provided with a second ventilation cavity (521) inside, and the second ventilation cavity (521) is connected to the first ventilation cavity (512). The right side of the third expansion sleeve (520) is provided with a plurality of ventilation holes (522) for conveying gas to the inside of the fourth expansion sleeve (530), and one end of the ventilation hole (522) is connected to the second ventilation cavity (521), and the other end of the ventilation hole (522) is connected to the fourth expansion sleeve (530).

7. A manual mechanical expansion clamp according to claim 6, Features: A fixing ring (540) is installed at the left end of the cavity of the second ventilation cavity (521), a sliding groove (541) is provided on the inner wall of the fixing ring (540), and the inner wall of the groove of the sliding groove (541) is inclined, an annular spring piece (542) is installed in the middle of the groove of the sliding groove (541), and a sealing disk (550) for blocking gas is slidably connected in the groove of the sliding groove (541).

8. A manual mechanical expansion clamp according to claim 7, Features: A connecting tube (580) is installed on the inner wall of the groove cavity of the second ventilation cavity (521), and a ventilation hole three (581) for gas circulation is opened inside the connecting tube (580), and the ventilation hole three (581) is connected to the second ventilation cavity (521), and a spring one (560) for controlling the sealing disk (550) to move to the left is sleeved on the outside of the connecting tube (580).

9. A manual mechanical expansion clamp according to claim 8, Features: A venting assembly (570) for opening and closing the third vent hole (581) is installed in the middle of the connecting tube (580), and the venting assembly (570) includes a push rod (571), a baffle (572) for sealing the third vent hole (581) is installed on the left side of the push rod (571), a sealing gasket (573) for preventing gas leakage is installed on the right side of the baffle (572), a push block (574) for facilitating pushing the push rod (571) is installed on the right end of the push rod (571), and a spring two (575) for controlling the push rod (571) to move to the right is installed on the right side of the push rod (571).

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