Double-conical-surface head clamp

Abstract

The double-conical-surface-head clamp comprises a clamping sleeve, a first fixed sleeve, a fixed cylinder, a piston disc, a first sealing sleeve, a second fixed sleeve, a movable sleeve and a second sealing sleeve, the clamping sleeve is in an original cylinder shape, a plurality of contraction joints are formed in the clamping sleeve, the contraction joints penetrate through the side wall of the clamping sleeve, the contraction joints are parallel to the axis of the clamping sleeve, the two ends of the clamping sleeve are conical surfaces, and the two ends of the clamping sleeve are conical surfaces. The clamping sleeve is sleeved with a first fixing sleeve, a first abutting face is arranged on the inner wall of the first fixing sleeve, the first abutting face abuts against one end of the clamping sleeve, the first fixing sleeve is sleeved with a fixing cylinder, external threads are arranged on the outer wall of the first fixing sleeve, and internal threads matched with the external threads are arranged on the inner wall of the fixing cylinder; the two ends of the clamping sleeve are arranged to be the conical surfaces, so that when the clamping sleeve clamps a workpiece, the workpiece is evenly stressed and is not prone to being damaged, the overall clamping force of the clamping sleeve on the workpiece can be increased, and the workpiece is not prone to slipping.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to the technical field of clamps. Background Art

[0002] The extruder spindle requires lathes and other processing equipment during processing. These equipment fix the workpiece through clamps. The existing clamps exert uneven pressure on the workpiece when clamping it. If the clamping force is too large, it will cause damage to the workpiece. If the clamping force is reduced to avoid the workpiece being clamped, the clamping will not be firm and the workpiece will easily loosen or slip off, which is not conducive to improving product quality. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a double-cone head clamp, which can ensure that the workpiece is evenly stressed after being clamped by the clamp, firmly clamped, and not easily damaged, thereby ensuring the quality of the product.

[0004] To achieve the above-mentioned purpose, the present invention proposes a double-cone head clamp, including a jacket, a first fixed jacket, a fixed cylinder, a piston disc, a first sealing sleeve, a second fixed jacket, a movable sleeve, and a second sealing sleeve. The jacket is in the shape of an original cylinder, and a plurality of shrinkage slits are opened on the jacket. The shrinkage slits penetrate the side wall of the jacket, and the shrinkage slits are parallel to the axis of the jacket. Both ends of the jacket are conical surfaces. A first fixed jacket is sleeved on the outside of the jacket, and a first abutting surface is provided on the inner wall of the first fixed jacket, and the first abutting surface abuts against one end of the jacket. A fixed cylinder is sleeved on the outside of the first fixed jacket, and an external thread is provided on the outer wall of the first fixed jacket, and an internal thread matching the external thread is provided on the inner wall of the fixed cylinder. The first fixed jacket and the fixed cylinder are connected by the external thread and the internal thread. A circle of piston disc is fixed on the outer wall of the fixed cylinder, and the fixed cylinder and the piston disc are an integrated structure. A second fixed jacket is provided on one side of the piston disc, and the second fixed jacket surrounds the fixed cylinder. A first sealing sleeve is sandwiched between the second fixed sleeve and the fixed cylinder, the second fixed sleeve and the first abutting surface are located on the same side of the piston disc, the movable sleeve is provided with a first groove, a second groove, a third groove, a fourth groove, and an auxiliary hole which are connected in sequence along the axial direction of the movable sleeve, the first groove, the second groove, and the third groove are cylindrical groove bodies with successively smaller inner diameters, the first groove is adapted to the piston disc, the piston disc is located in the first groove, a first sealing ring is embedded on the outer wall of the piston disc, the first sealing ring is in close contact with the inner wall of the first groove, a second sealing sleeve is sandwiched between the inner wall of the second groove and the outer wall of the fixed cylinder, there are gaps between the first fixed sleeve and the bottom of the third groove, and between the fixed cylinder and the bottom of the third groove, the fourth groove is a frustoconical groove body, the fourth groove and the first abutting surface are respectively located at two ends of the jacket, the inner wall of the fourth groove and the first abutting surface are respectively adapted to the end face of the corresponding jacket.

[0005] Preferably, the shrinkage seam comprises a first seam and a second seam, the first seam and the second seam are respectively opened at two ends of the jacket, the length of the first seam and the second seam are both 1 / 2-4 / 5 of the length of the jacket, and the first seam and the second seam are spaced apart along the circumferential surface of the jacket.

[0006] Preferably, a second abutting surface is provided on the inner wall of the second fixing sleeve, and an abutted surface is provided on the outer wall of the first sealing sleeve, and the second abutting surface abuts against the first sealing sleeve.

[0007] Preferably, the bottom of the second groove abuts against the second sealing sleeve.

[0008] Preferably, second sealing rings are embedded on the outer walls of the first sealing sleeve and the second sealing sleeve, and C-shaped sealing rings are embedded on the inner walls of the first sealing sleeve and the second sealing sleeve.

[0009] Preferably, the outer diameter of the first fixing sleeve is adapted to the inner diameter of the fixing tube, the internal thread protrudes on the inner wall of the fixing tube, the external thread is recessed on the outer wall of the first fixing sleeve, the internal thread is located at the end of the fixing tube close to the fourth groove, and the external thread is located at the end of the first fixing sleeve close to the fourth groove.

[0010] Preferably, the minimum inner diameter of the first fixed sleeve is larger than the inner diameter of the jacket, and the minimum inner diameter of the movable sleeve is larger than the inner diameter of the jacket.

[0011] Preferably, positioning pins are provided on both sides of the piston disc, and slots adapted to the positioning pins are provided at the end of the second fixing sleeve and the bottom of the first groove, and the positioning pins are inserted into the slots.

[0012] Preferably, the locating pins on both sides of the piston disc correspond to each other one by one, and the corresponding locating pins are part of a main pin, and the main pin penetrates the piston disc.

[0013] Preferably, the inner wall of the first groove, the inner wall of the second groove, the outer wall of the fixing tube, and the inner wall of the first fixing tube are all provided with a copper layer.

[0014] Beneficial effects of the present invention: By setting the two ends of the sleeve to conical surfaces, the workpiece is evenly stressed when the sleeve clamps the workpiece, the workpiece is not easily damaged, the overall clamping force of the sleeve on the workpiece is increased, and the workpiece is not easy to slip; the setting of the locating pin can effectively avoid the situation where the sleeve becomes loose due to the rotation of the piston disc.

[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the double-cone head fixture of the present invention; Figure 2 It is a partial cross-sectional view of the double-cone head fixture of the present invention.

[0017] In the figure: 1-jacket, 2-first fixed sleeve, 3-fixed cylinder, 4-second fixed sleeve, 5-movable sleeve, 10-contraction joint, 20-external thread, 30-internal thread, 31-first sealing sleeve, 32-second sealing sleeve, 33-second sealing ring, 34-C-shaped sealing ring, 35-piston disc, 36-first sealing ring, 37-locating pin, 40-slot, 51-first groove, 52-second groove, 53-third groove, 54-fourth groove, 55-auxiliary hole. DETAILED DESCRIPTION

[0018] Embodiment 1: See also Figure 1 , Figure 2 The double-cone head fixture of the present invention comprises a jacket 1, a first fixed sleeve 2, a fixed cylinder 3, a piston disc 35, a first sealing sleeve 31, a second fixed sleeve 4, a movable sleeve 5, and a second sealing sleeve 32. The jacket 1 is in the shape of a cylinder. A plurality of shrinkage seams 10 are provided on the jacket 1. The shrinkage seams 10 penetrate the side wall of the jacket 1. The shrinkage seams 10 are parallel to the axis of the jacket 1. Both ends of the jacket 1 are conical surfaces. A first fixed sleeve 2 is provided on the outside of the jacket 1. A first abutting surface is provided on the inner wall of the first fixed sleeve 2. The first abutting surface abuts against the jacket 1, a fixing sleeve 3 is sleeved on the outer side of the first fixing sleeve 2, an outer wall of the first fixing sleeve 2 is provided with an outer thread 20, an inner wall of the fixing sleeve 3 is provided with an inner thread 30 matched with the outer thread 20, the first fixing sleeve 2 and the fixing sleeve 3 are connected through the outer thread 20 and the inner thread 30, a circle of piston disc 35 is fixed on the outer wall of the fixing sleeve 3, the fixing sleeve 3 and the piston disc 35 are an integrated structure, a second fixing sleeve 4 is provided on one side of the piston disc 35, the second fixing sleeve 4 surrounds the fixing sleeve 3, the second fixing sleeve 4 and the fixing sleeve 3 are connected to the fixing sleeve 3. A first sealing sleeve 31 is sandwiched between the fixed sleeve 3, the second fixed sleeve 4 and the first abutting surface are located on the same side of the piston disc 35, and the movable sleeve 5 is provided with a first groove 51, a second groove 52, a third groove 53, a fourth groove 54, and an auxiliary hole 55 which are sequentially connected along the axial direction of the movable sleeve 5. The first groove 51, the second groove 52, and the third groove 53 are cylindrical grooves with successively smaller inner diameters. The first groove 51 is adapted to the piston disc 35, and the piston disc 35 is located inside the first groove 51. A first sealing ring 36 is embedded on the outer wall, and the first sealing ring 36 is in close contact with the inner wall of the first groove 51. A second sealing sleeve 32 is sandwiched between the inner wall of the second groove 52 and the outer wall of the fixed tube 3. There are gaps between the first fixed sleeve 2 and the bottom of the third groove 53, and between the fixed tube 3 and the bottom of the third groove 53. The fourth groove 54 is a frustoconical groove body. The fourth groove 54 and the first abutting surface are respectively located at both ends of the jacket 1, and the inner wall of the fourth groove 54 and the first abutting surface are respectively adapted to the corresponding end surface of the jacket 1.

[0019] In order to make the workpiece more evenly stressed, the shrinkage seam 10 includes a first seam and a second seam, which are respectively opened at two ends of the jacket 1. The lengths of the first seam and the second seam are both 1 / 2-4 / 5 of the length of the jacket 1, and the first seam and the second seam are spaced apart along the circumferential surface of the jacket 1.

[0020] A second abutting surface is disposed on the inner wall of the second fixing sleeve 4 , and an abutted surface is disposed on the outer wall of the first sealing sleeve 31 . The second abutting surface abuts against the first sealing sleeve 31 .

[0021] The bottom of the second groove 52 abuts against the second sealing sleeve 32 .

[0022] In order to ensure the sealing performance, second sealing rings 33 are embedded on the outer walls of the first sealing sleeve 31 and the second sealing sleeve 32 , and C-shaped sealing rings 34 are embedded on the inner walls of the first sealing sleeve 31 and the second sealing sleeve 32 .

[0023] The outer diameter of the first fixed sleeve 2 is adapted to the inner diameter of the fixed cylinder 3, the internal thread 30 is raised on the inner wall of the fixed cylinder 3, the external thread 20 is recessed on the outer wall of the first fixed sleeve 2, the internal thread 30 is located at the end of the fixed cylinder 3 close to the fourth groove 54, and the external thread 20 is located at the end of the first fixed sleeve 2 close to the fourth groove 54.

[0024] The minimum inner diameter of the first fixed sleeve 2 is larger than the inner diameter of the jacket 1 , and the minimum inner diameter of the movable sleeve 5 is larger than the inner diameter of the jacket 1 .

[0025] In order to prevent the seal from being worn, the inner wall of the first groove 51 , the inner wall of the second groove 52 , the outer wall of the fixing cylinder 3 , and the inner wall of the first fixing cylinder 3 are all provided with a copper layer.

[0026] Embodiment 2: In order to prevent the piston disc 35 from rotating and causing the jacket 1 to loosen, positioning pins 37 are provided on both sides of the piston disc 35, and slots 40 adapted to the positioning pins 37 are provided at the end of the second fixing sleeve 4 and the bottom of the first groove 51, and the positioning pins 37 are inserted into the slots 40.

[0027] The locating pins 37 on both sides of the piston plate 35 correspond to each other one by one, and the corresponding locating pins 37 are part of a main pin, and the main pin penetrates the piston plate 35 .

[0028] Working process of the present invention: During operation of the double-cone head clamp of the present invention, the workpiece is inserted into the sleeve 1, the movable sleeve 5 is moved toward the first fixed sleeve 2, the movable sleeve 5 contacts the end of the sleeve 1 and continues to move, and the sleeve 1 contracts inwardly under the pressure of the movable sleeve 1 and the first fixed sleeve 2 to clamp the workpiece.

[0029] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. Double cone head fixture, characterized by: The invention comprises a jacket (1), a first fixed jacket (2), a fixed cylinder (3), a piston disc (35), a first sealing jacket (31), a second fixed jacket (4), a movable jacket (5), and a second sealing jacket (32). The jacket (1) is in the shape of a cylinder. A plurality of shrinkage slits (10) are provided on the jacket (1). The shrinkage slits (10) penetrate the side wall of the jacket (1). The shrinkage slits (10) are parallel to the axis of the jacket (1). Both ends of the jacket (1) are conical surfaces. A first fixed jacket (2) is provided on the outside of the jacket (1). A first abutting surface is provided on the inner wall of the first fixed jacket (2). The first abutting surface abuts against one end of the jacket (1). A fixing sleeve (3) is sleeved on the outer side of the first fixing sleeve (2); an outer wall of the first fixing sleeve (2) is provided with an external thread (20); an inner wall of the fixing sleeve (3) is provided with an internal thread (30) matching the external thread (20); the first fixing sleeve (2) and the fixing sleeve (3) are connected via the external thread (20) and the internal thread (30); a circle of piston disc (35) is fixed on the outer wall of the fixing sleeve (3); the fixing sleeve (3) and the piston disc (35) are an integrated structure; a second fixing sleeve (4) is provided on one side of the piston disc (35); the second fixing sleeve (4) surrounds the fixing sleeve (3); the second fixing sleeve (4) and the fixing sleeve (3) are connected to each other; A first sealing sleeve (31) is sandwiched between the fixed sleeve (3), the second fixed sleeve (4) and the first abutting surface are located on the same side of the piston disc (35), the movable sleeve (5) is provided with a first groove (51), a second groove (52), a third groove (53), a fourth groove (54), and an auxiliary hole (55) which are connected in sequence along the axial direction of the movable sleeve (5), the first groove (51), the second groove (52), and the third groove (53) are cylindrical groove bodies with inner diameters decreasing in sequence, the first groove (51) is adapted to the piston disc (35), the piston disc (35) is located in the first groove (51), and the piston disc (35) A first sealing ring (36) is embedded on the outer wall of the jacket (35), the first sealing ring (36) is in close contact with the inner wall of the first groove (51), a second sealing sleeve (32) is sandwiched between the inner wall of the second groove (52) and the outer wall of the fixed cylinder (3), there are gaps between the first fixed sleeve (2) and the bottom of the third groove (53), and between the fixed cylinder (3) and the bottom of the third groove (53), the fourth groove (54) is a truncated cone-shaped groove body, the fourth groove (54) and the first abutting surface are respectively located at two ends of the jacket (1), and the inner wall and the first abutting surface of the fourth groove (54) are respectively adapted to the end surface of the corresponding jacket (1).

2. The double-cone head fixture according to claim 1, characterized in that: The shrinkage seam (10) comprises a first seam and a second seam, the first seam and the second seam are open at two ends of the jacket (1) respectively, the length of the first seam and the second seam are both 1 / 2-4 / 5 of the length of the jacket (1), and the first seam and the second seam are spaced apart along the circumferential surface of the jacket (1).

3. The double-cone head fixture according to claim 1, characterized in that: A second abutting surface is provided on the inner wall of the second fixing sleeve (4), an abutted surface is provided on the outer wall of the first sealing sleeve (31), and the second abutting surface abuts against the first sealing sleeve (31).

4. The double-cone head fixture according to claim 1, characterized in that: The bottom of the second groove (52) abuts against the second sealing sleeve (32).

5. The double-cone head fixture according to claim 1, characterized in that: Second sealing rings (33) are embedded on the outer walls of the first sealing sleeve (31) and the second sealing sleeve (32), and C-shaped sealing rings (34) are embedded on the inner walls of the first sealing sleeve (31) and the second sealing sleeve (32).

6. The double-cone head fixture according to claim 1, characterized in that: The outer diameter of the first fixing sleeve (2) is adapted to the inner diameter of the fixing cylinder (3); the internal thread (30) is protruding on the inner wall of the fixing cylinder (3); the external thread (20) is recessed on the outer wall of the first fixing sleeve (2); the internal thread (30) is located at an end of the fixing cylinder (3) close to the fourth groove (54); and the external thread (20) is located at an end of the first fixing sleeve (2) close to the fourth groove (54).

7. The double-cone head fixture according to claim 1, characterized in that: The minimum inner diameter of the first fixed sleeve (2) is greater than the inner diameter of the jacket (1), and the minimum inner diameter of the movable sleeve (5) is greater than the inner diameter of the jacket (1).

8. The double-cone head fixture according to any one of claims 1 to 7, characterized in that: Positioning pins (37) are provided on both sides of the piston disc (35), and slots (40) adapted to the positioning pins (37) are provided at the end of the second fixing sleeve (4) and the bottom of the first groove (51), and the positioning pins (37) are inserted into the slots (40).

9. The double-cone head fixture according to claim 8, characterized in that: The positioning pins (37) on both sides of the piston disc (35) correspond to each other one by one, and the corresponding positioning pins (37) are part of a main pin, and the main pin penetrates the piston disc (35).

10. The double-cone head fixture according to any one of claims 1 to 9, characterized in that: The inner wall of the first groove (51), the inner wall of the second groove (52), the outer wall of the fixing cylinder (3), and the inner wall of the first fixing cylinder (3) are all provided with a copper layer.

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