Quick-change multipurpose clamp

Abstract

The utility model relates to a quick change multi-purpose clamp, including first end cap, second end cap, lead screw, guide screw, slider, connecting rod, clamping jaw and thickening jaw, first end cap and second end cap are fixed through guide screw, lead screw is rotatablely supported in first end cap and second end cap central position, the number of clamping jaw is three, and the thickening jaw is connected with the lead screw. The three clamping jaws are circumferentially distributed outside the lead screw at equal angles, each clamping jaw is hinged to the corresponding sliding block through a connecting rod, the portion, between the first end cover and the second end cover, of the lead screw is sleeved with the center of the sliding block, and detachable thickening jaws are arranged outside the clamping jaws. According to the fixture, external clamping and internal supporting fixed clamping of parts is achieved, the clamping difficulty is lowered, the clamping efficiency is improved, the machining range of the parts is adjusted by replacing different thickening claws, and the application range of the fixture is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tooling fixtures, in particular to a quick-change multi-purpose fixture. Background Art

[0002] A fixture is a device used to fix the workpiece in the mechanical manufacturing process so that it is in the correct position for easy processing or testing. It is also called a clamp. Its main function is to ensure that the workpiece maintains the correct positioning and stable clamping state during the processing, thereby meeting the processing accuracy requirements.

[0003] Most existing fixtures use a single external clamp or internal support to fix and clamp parts. This results in a single clamping method for the fixture, which is not convenient for clamping parts with different requirements. Different fixtures need to be replaced for processing, which increases the clamping difficulty of the fixture and affects the efficiency of clamping parts, thereby affecting the processing efficiency. In addition, the clamping range of the fixture is fixed, which affects the practicality of the fixture. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a quick-change multi-purpose clamp to achieve external clamping and internal support fixed clamping of parts, reduce the clamping difficulty, improve the clamping efficiency, and adjust the processing range of parts by replacing different thickened claws, thereby improving the applicability of the clamp.

[0005] The purpose of this utility model is achieved in this way:

[0006] A quick-change multi-purpose clamp includes a first end cover, a second end cover, a lead screw, a guide screw, a slider, a connecting rod, a clamp and a thickened jaw. The first end cover and the second end cover are fixed by a guide screw. The lead screw is rotatably supported at the center position of the first end cover and the second end cover. Three clamps are provided, and the three clamps are distributed at equal angles outside the lead screw. Each clamp is hinged to the slider through a connecting rod. The center of the slider is sleeved on the lead screw between the first end cover and the second end cover. A detachable thickened jaw is provided on the outside of the clamp.

[0007] Preferably, the second end cover is fixedly connected to the scale sleeve, and the screw is connected to the rotating body after extending out of the scale sleeve. The screw is rotatably supported in the scale sleeve through a bushing. A cursor is provided on the screw in the scale sleeve, and a sliding groove is provided on the circumference of the scale sleeve corresponding to the cursor, and scales are marked along the length direction of the sliding groove.

[0008] Preferably, three guide screws are distributed outside the lead screw at equal angles on the circumference, and guide holes are provided on the edge of the slider corresponding to the guide screws.

[0009] Preferably, each clamping jaw is provided with connecting rods symmetrically on the left and one end of the connecting rod on the left is hinged to the clamping jaw and the other end is hinged to the slider. The connecting rod on the right is hinged to the clamping jaw and the other end is hinged to the second end cover.

[0010] Preferably, a positioning pin is provided between the clamping jaw and the thickening jaw, and the clamping jaw and the thickening jaw are fixed by a conveniently disassembled screw.

[0011] Preferably, the scale sleeve is provided with three sliding grooves in the circumference.

[0012] Preferably, the rotating body is connected to a rotating cover, and a top hole is provided in the center of the rotating cover.

[0013] Preferably, the cross-section of the first end cover is a regular hexagon.

[0014] The beneficial effects of the utility model are:

[0015] The positions of the cursor and the slider are adjusted by rotating the lead screw, so that the cursor displays the reading on the scale sleeve, which makes the diameter of the inner cavity of the clamped part visible. The movement of the slider adjusts the state of the clamping jaws through the connecting rod, which is convenient for external clamping and fixing of the part by the clamping jaws, and the movement of the clamping jaws facilitates the lifting of the thickened jaws to support the part internally, which can realize external clamping and internal support fixation of the part, reduce the difficulty of clamping the part, improve the clamping efficiency, and adjust the processing range of the part by replacing different thickened jaws, thereby improving the application range of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an overall structural diagram of a quick-change multi-purpose clamp of the present utility model.

[0017] Figure 2 This is a sectional view of the overall structure of a quick-change multi-purpose clamp of the present utility model.

[0018] Figure 3 for Figure 2 Cross-sectional view at AA and BB in the middle.

[0019] Figure 4 for Figure 2 C-direction view.

[0020] Among them: 1. First end cover; 2. Screw sleeve; 3. Screw; 4. Rotating cover; 5. Rotating body; 6. Bushing; 7. Scale sleeve; 8. Vernier; 9. Second end cover; 10. Clamping jaw; 11. Connecting rod; 12. Slider; 13. Easy-to-remove screw; 14. Thickened claw; 15. Guide screw; 16. Limiting sleeve; 17. Center hole; 18. Positioning pin. DETAILED DESCRIPTION

[0021] See also Figure 1-4The utility model relates to a quick-change multi-purpose clamp, including a first end cover 1, a second end cover 9, a lead screw 3, a guide screw 15, a slider 12, a connecting rod 11, a clamping jaw 10 and a thickened jaw 14. A lead screw 3 and a plurality of guide screws 15 are provided between the first end cover 1 and the second end cover 9. The lead screw 3 is rotatably supported at the center of the first end cover 1 and the second end cover 9. The clamping jaw 10 is provided with three, and the three clamping jaws 10 are distributed at equal angles outside the lead screw 3. Each clamping jaw 10 is hinged to the slider 12 through the connecting rod 11. The core sleeve is arranged on the screw 3 between the first end cover 1 and the second end cover 9. The guide screw 15 passes through the second end cover 9 and is threadedly fixed to the first end cover 1, so as to facilitate the fixed connection between the first end cover 1 and the second end cover 9. The three guide screws 15 are distributed at equal angles around the outside of the screw 3. The screw 3 drives the slider 12 to move. In order to make the slider 12 move smoothly, the edge of the slider 12 is provided with a guide hole corresponding to the guide screw 15, which facilitates the guide screw 15 to guide the moving direction of the slider 12. The clamp 10 is provided with a detachable thickened claw 14 on the outside.

[0022] Each clamping jaw 10 is symmetrically provided with a connecting rod 11. One end of the connecting rod 11 on the left is hinged to the clamping jaw 10, and the other end is hinged to the slider 12. One end of the connecting rod 11 on the right is hinged to the clamping jaw 10, and the other end is hinged to the second end cover 9. The two connecting rods improve the supporting capacity and clamping capacity of the clamping jaw.

[0023] A positioning pin 18 is provided between the clamping jaw 10 and the thickening jaw 14 to facilitate the installation and positioning of the thickening jaw 14 . The clamping jaw 10 and the thickening jaw 14 are fixed by a conveniently disassembled screw 13 .

[0024] The second end cover 9 is fixedly connected to the scale sleeve 7. The screw 3 extends out of the scale sleeve 7 and is connected to the rotating body 5. The screw 3 is rotatably supported in the scale sleeve 7 by the bushing 6. A cursor 8 is sleeved on the screw 3 in the scale sleeve 7. The scale sleeve 7 is provided with a slide groove corresponding to the cursor 8 in the circumferential direction. A scale is marked along the length direction of the slide groove. The screw 3 drives the cursor 8 to move horizontally along the slide groove. The cursor 8 displays the scale value in real time. The scale sleeve 7 is provided with three slide grooves in the circumference, which is convenient for fast and accurate readings at different angles. At the same time, it is also for the purpose of quickly rotating to the required diameter according to the size of the inner cavity wall of the part.

[0025] The rotating body 5 is connected to the rotating cover 4 , and a top hole 17 is provided in the center of the rotating cover 4 .

[0026] The cross section of the first end cover 1 is a regular hexagon, which is convenient for clamping by a chuck of a lathe.

[0027] A screw sleeve 2 is provided between the first end cover 1 and the screw 3 . The screw sleeve 2 is fixedly provided inside the first end cover 1 , and the screw 3 is rotatably connected inside the screw sleeve 2 .

[0028] A limiting sleeve 16 is provided between the second end cover 9 and the lead screw 3 . The limiting sleeve 16 is fixedly provided inside the second end cover 9 , and the lead screw 3 is rotatably connected inside the limiting sleeve 16 .

[0029] Working principle:

[0030] When the parts are fixed with internal support, the thin-walled parts are put on the thickened claws 14, and the rotating cover 4 is rotated to drive the rotating body 5 to rotate, thereby driving the screw 3 to rotate. The rotation of the screw 3 drives the cursor 8 and the slider 12 to move synchronously. The cursor 8 moves horizontally in the three slots of the scale sleeve 7, which can quickly and easily read accurate readings at different angles. At the same time, it can be quickly rotated to the required diameter according to the size of the inner wall of the part. The movement of the slider 12 drives the connecting rod 11 on the left to rotate and support the clamping jaw 10 outward. The support of the clamping jaw 10 drives the connecting rod 11 on the right to rotate. The two connecting rods 11 support the clamping jaw 10 to improve the supporting capacity of the clamping jaw 10. The guide screw 15 can To guide the moving direction of the slider 12, the screw sleeve 2, the limit sleeve 16 and the bushing 6 can prevent the thread of the screw 3 from contacting the first end cover 1, the second end cover 9 and the inner surface of the scale sleeve 7, and also play a role in reducing friction, fixing the relative position and facilitating installation. The locating pin 18 can position the thickening claw 14 when installing the thickening claw 14, so that the thickening claw 14 can be fixed by the easy-to-remove screw 13. The thickening claw 14 can be designed according to different needs to cope with different types and meet different processing needs. A top hole 17 is provided on the right side of the rotating cover 4, and the top on the tailstock of the lathe can be used to improve the stability during clamping and processing.

[0031] When fixing a part with an external clamp, first prop up the clamping jaw 10, then put the part inside the clamping jaw 10, rotate the rotating cover 4 to move the slider 12 to the right to drive the clamping jaw 10 to contract and fix the part.

[0032] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A quick-change multi-purpose clamp, characterized by: It includes a first end cover, a second end cover, a lead screw, a guide screw, a slider, a connecting rod, a clamp and a thickened claw. The first end cover and the second end cover are fixed by a guide screw. The lead screw is rotatably supported at the center position of the first end cover and the second end cover. There are three clamps, and the three clamps are distributed at equal angles outside the lead screw. Each clamp is hinged to the slider through a connecting rod. The center of the slider is sleeved on the lead screw between the first end cover and the second end cover. A detachable thickened claw is provided on the outside of the clamp.

2. The quick-change multi-purpose clamp according to claim 1, characterized in that: The second end cover is fixedly connected to the scale sleeve, and the lead screw is connected to the rotating body after extending out of the scale sleeve. The lead screw is rotatably supported in the scale sleeve through a bushing. A cursor is sleeved on the lead screw in the scale sleeve, and a sliding groove is provided on the scale sleeve corresponding to the cursor in the circumference, and scales are marked along the length direction of the sliding groove.

3. The quick-change multi-purpose clamp according to claim 1, characterized in that: Three guide screws are distributed outside the lead screw at equal angles on the circumference, and guide holes are provided on the edge of the slider corresponding to the guide screws.

4. The quick-change multi-purpose clamp according to claim 1, characterized in that: Each clamping jaw is symmetrically provided with connecting rods. One end of the connecting rod on the left is hinged to the clamping jaw, and the other end is hinged to the slider. One end of the connecting rod on the right is hinged to the clamping jaw, and the other end is hinged to the second end cover.

5. The quick-change multi-purpose clamp according to claim 1, characterized in that: A positioning pin is provided between the clamping jaw and the thickening jaw, and the clamping jaw and the thickening jaw are fixed by easily disassembled screws.

6. The quick-change multi-purpose clamp according to claim 2, characterized in that: The scale sleeve is provided with three sliding grooves in the circumference.

7. The quick-change multi-purpose clamp according to claim 2, characterized in that: The rotating body is connected to the rotating cover, and a top hole is provided in the center of the rotating cover.

8. The quick-change multi-purpose clamp according to claim 1, characterized in that: The first end cover has a cross section in the shape of a regular hexagon.

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