Safety chuck

Abstract

The utility model discloses a safety chuck which comprises a shaft seat and a chuck body, a transmission shaft is rotatably arranged in the middle of one side wall of an installation seat, the transmission shaft is in transmission connection with a power device through a key, an installation hole is formed in the other side wall of the installation seat, and a connecting shaft is rotatably arranged in the installation hole. Through the elastic clamp mechanism, the material shaft end placed in the clamping groove can be clamped, after the material shaft end is placed in, the movable chuck is pushed to be perpendicular to the material shaft, the locking screw is rotated to enable the top head part to abut against the shaft end of the rotating shaft, the movable chuck is firmly fixed, meanwhile, the adjusting nut is rotated to push the sliding block to slide downwards, and the material shaft end is clamped. By clamping the upper edge, the lower edge, the left edge and the right edge of the material shaft, the material shaft can synchronously rotate along with the clamping head, installation is convenient and rapid, clamping is firm, the material shaft clamping device can be matched with the material shafts of different shapes and sizes, the application range is wide, and the transmission effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of chucks, in particular to a safety chuck. Background Art

[0002] There are many types of existing safety chucks, and their principles are also different. However, the opening or closing of existing safety chucks is controlled by a transmission mechanism, and their safety performance is poor. Safety chucks provide fast, safe, reliable and simple coupling and disengagement operations for frequent actions such as coupling transmission and disengagement. Moreover, the specifications and dimensions of the transmission part of the safety chuck can be designed and manufactured according to the customer's mechanical specifications and characteristics. The overall structure has excellent rigidity, can withstand high torque, and is safe without the worry of loosening during rotation.

[0003] However, due to the fixed size of the existing safety chuck, the chuck head cannot adapt well to the material shaft ends of different shapes and sizes. When the material shaft is replaced, the safety chuck must be replaced accordingly, which increases the cost. Moreover, when the safety chuck is used for a long time and wears out, the material shaft cannot be firmly fixed, and it will shake greatly when rotating, which may easily cause safety hazards.

[0004] Therefore, it is necessary to provide a safety chuck to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a safety chuck to solve the problems raised in the above background technology.

[0006] The chuck is provided with a clamping groove, and a locking hole is provided in the middle position of the bottom of the clamping groove. The front and rear inner walls of the clamping groove are provided with a placement groove, and the bottom of the placement groove is provided with a placement hole. A limited position protrusion is provided on the front of the clamp, and an elastic clamping mechanism is provided in the placement groove. An active chuck is movably provided on the outer side of the clamp, and an installation groove is provided on the side wall of the active chuck. The shape of the installation groove is adapted to the shape of the chuck, and a through hole is provided in the middle of the bottom of the installation groove, a sliding groove is provided on the top of the inner wall of the installation groove, a countersunk hole is provided on the bottom of the sliding groove, and a clamping mechanism is slidably provided in the sliding groove.

[0007] As a preferred technical solution of the utility model, the elastic clamp mechanism includes an elastic sheet, both ends of the elastic sheet are provided with sliding shafts, the other end of the sliding shaft is slidably arranged in the placement hole, and a spring is arranged between one end of the sliding shaft and the bottom of the placement hole.

[0008] As a preferred technical solution of the present utility model, the clamping mechanism includes a slider, the slider is slidably arranged in a chute, a threaded connection hole is formed at the top of the slider, a placement groove is formed at the bottom of the slider, an adjusting nut is rotatably arranged in the counterbore, and an external thread is formed at the lower end of the adjusting nut and is screwed with the threaded connection hole. A rubber block is arranged in the placement groove, and the bottom of the rubber block is arc-shaped.

[0009] As a preferred technical solution of the present utility model, rotation holes are formed on the front and rear inner walls of the installation groove, a rotating shaft is rotatably arranged in the rotation hole, the other end of the rotating shaft is rotatably arranged on the end face of the chuck, and the movable chuck is rotatably arranged outside the chuck through the rotating shaft. Two counterbore threaded holes are formed on the outer circumferential surface of the movable chuck, the counterbore threaded holes are arranged opposite to the rotation holes, and locking screws are arranged in the counterbore threaded holes.

[0010] As a preferred technical solution of the present utility model, the locking screw includes a top head part and a threaded part, the threaded part is screwed with the counterbore threaded hole, and the diameter of the top head part is smaller than that of the threaded part.

[0011] As a preferred technical solution of the present utility model, the elastic piece structure is U-shaped, and its two ends protrude outward in an arc shape.

[0012] As a preferred technical solution of the present utility model, the chute structure is a square groove.

[0013] As a preferred technical solution of the present utility model, the shaft seat includes a base and a mounting seat, the mounting seat is fixedly connected to the base, and two connection holes are formed in the base.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] For a safety chuck of the present utility model, when in use, the safety chuck is fixed to a suitable position by bolts passing through the connection holes. An elastic clamping mechanism is arranged in the placement groove, which can clamp the shaft end of the material placed in the card slot to prevent large shaking during its operation. After the shaft end of the material is placed, the movable chuck is pushed so that the front of the movable chuck abuts against the back of the limit protrusion. At this time, the movable chuck is perpendicular to the material shaft. The locking screw is rotated so that the top head part tightly presses the shaft end of the rotating shaft to firmly fix the movable chuck. At the same time, by rotating the adjusting nut, the slider is pushed to slide down until the arc-shaped bottom surface of the rubber block abuts against and presses the outer edge of the material shaft. By clamping the upper, lower, left, and right outer edges of the material shaft, the material shaft can be made to rotate synchronously with the chuck. The installation is convenient and fast, the clamping is firm. Even when the chuck is worn after long-term use, it can be adjusted to prevent shaking when the material shaft rotates. Moreover, it can cooperate with material shafts of different shapes and sizes, has a wide application range, and good transmission effect. Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a three-dimensional exploded schematic diagram of the overall structure of the present utility model;

[0019] Figure 3 is a three-dimensional schematic diagram of the movable chuck structure of the present utility model;

[0020] Figure 4 is an axonometric drawing of the movable chuck structure of the present utility model;

[0021] Figure 5 is a three-dimensional schematic diagram of the clamping mechanism structure of the present utility model;

[0022] Figure 6 is a three-dimensional schematic diagram of the elastic clip mechanism structure of the present utility model.

[0023] In the figure: 1, shaft seat; 101, base; 1011, connection hole; 102, mounting seat; 1021, mounting hole; 2, transmission shaft; 3, chuck; 31, card slot; 32, locking hole; 33, placement groove; 34, placement hole; 35, limit protrusion; 4, movable chuck; 41, mounting groove; 42, through hole; 43, rotating hole; 44, countersunk threaded hole; 45, sliding groove; 46, countersunk hole; 5, clamping mechanism; 51, slider; 511, threaded connection hole; 512, placement groove; 52, adjusting nut; 53, rubber block; 6, locking screw; 61, top head; 62, threaded part; 7, elastic clip mechanism; 71, elastic piece; 72, sliding shaft; 73, spring; 8, connecting shaft. Specific embodiments

[0024] The embodiments of the present utility model will be described below with reference to the accompanying drawings. During this process, to ensure the clarity and convenience of the description, we may exaggerate the width of the lines or the size of the components in the drawings.

[0025] In addition, the terms used below are defined based on the functions in the present utility model and may vary according to the intentions or conventions of users and operators. Therefore, these terms are defined based on the entire content of this specification.

[0026] Such as Figures 1 to 6As shown in the figure, a safety chuck includes a shaft seat 1 and a chuck 3. The shaft seat 1 includes a base 101 and a mounting seat 102. The mounting seat 102 is fixedly connected to the base 101. Two connecting holes 1011 are provided on the base 101. The safety chuck is fixed in place by screwing two bolts through the connecting holes 1011 and into a fixing member. An installation hole 1021 is provided on the side wall of the mounting seat 102. A transmission shaft 2 is rotatably arranged in the middle of the other side wall of the mounting seat 102. The transmission shaft 2 is in transmission connection with a power device through a key to drive the transmission shaft 2 to rotate. A connecting shaft 8 is rotatably arranged in the installation hole 1021. One end of the connecting shaft 8 rotates synchronously with the transmission shaft 2. The chuck 3 is arranged at the other end of the connecting shaft 8. A clamping groove 31 is provided on the side wall of the chuck 3. A locking hole 32 is provided in the middle of the bottom of the clamping groove 31. The chuck 3 is locked to the end of the connecting shaft 8 by screwing a screw through the locking hole 32 and into the end of the connecting shaft 8. Placing grooves 33 are provided on the front and rear inner walls of the clamping groove 31. A placing hole 34 is provided at the bottom of the placing groove 33. A limiting protrusion 35 is provided on the front surface of the chuck 3. An elastic clamping mechanism 7 is arranged in the placing groove 33. The elastic clamping mechanism 7 includes an elastic piece 71. The structure of the elastic piece 71 is U-shaped, and its two ends protrude outward in an arc shape to facilitate clamping of a circular shaft end. Sliding shafts 72 are provided at both ends of the elastic piece 71. The other ends of the sliding shafts 72 are slidably arranged in the placing holes 34. A spring 73 is arranged between one end of each sliding shaft 72 and the bottom of the placing hole 34. The spring 73 is provided to facilitate pushing the sliding shafts 72 to slide outward from the placing holes 34, thereby automatically clamping the end of a material shaft.

[0027] An active chuck 4 is movably arranged outside the chuck 3. An installation groove 41 is provided on the side wall of the active chuck 4. The outer shape of the installation groove 41 is adapted to the outer shape of the chuck 3 to facilitate the clamping connection between the active chuck 4 and the chuck 3. A through hole 42 is provided in the middle of the bottom of the installation groove 41 to facilitate the passing of the connecting shaft 8. Rotating holes 43 are provided on the front and rear inner walls of the installation groove 41. A rotating shaft 9 is rotatably arranged in each rotating hole 43. The other end of the rotating shaft 9 is rotatably arranged on the end face of the chuck 3. The active chuck 4 is rotatably arranged outside the chuck 3 through the rotating shaft 9. Two counterbore threaded holes 44 are provided on the outer circumferential surface of the active chuck 4. The counterbore threaded holes 44 are arranged opposite to the rotating holes 43. Locking screws 6 are arranged in the counterbore threaded holes 44. The locking screws 6 include a head part 61 and a threaded part 62. The threaded part 62 is screwed into the counterbore threaded holes 44. The diameter of the head part 61 is smaller than that of the threaded part 62 to facilitate passing through the bottom of the counterbore threaded holes 44 and pressing against the end of the rotating shaft 9, thereby adjusting the angle of the active chuck 4 and fixing it. A sliding groove 45 is provided at the top of the inner wall of the installation groove 41. The structure of the sliding groove 45 is a square groove. A counterbore 46 is provided at the bottom of the sliding groove 45. A clamping mechanism 5 is slidably arranged in the sliding groove 45.

[0028] The clamping mechanism 5 includes a slider 51, which is slidably arranged in the slide groove 45. A threaded connection hole 511 is provided at the top of the slider 51, and a placement groove 512 is provided at the bottom of the slider 51. An adjusting nut 52 is rotatably arranged in the countersunk hole 46. An external thread is provided at the lower end of the adjusting nut 52 and is screwed into the threaded connection hole 511. The slider 51 can be pushed to slide up and down by rotating the adjusting nut 52. A rubber block 53 is provided in the placement groove 512, and the bottom of the rubber block 53 is arc-shaped. When the slider 51 slides down, the rubber block 53 contacts the end face of the material shaft to clamp it, so that the clamping is reliable and the transmission is stable.

[0029] The specific implementation method is as follows: when in use, the safety clamp is fixed to a suitable position by passing the bolt through the connecting hole 1011, and an elastic clamping mechanism 7 is arranged in the placement groove 33, which can clamp the shaft end of the material placed in the clamping groove 31 to prevent it from shaking greatly during work. After the shaft end of the material is placed, the movable chuck 4 is pushed so that the front of the movable chuck 4 abuts against the rear of the limiting protrusion 35. At this time, the movable chuck 4 is perpendicular to the material axis, and the locking screw 6 is rotated to make the top head 61 press against the shaft end of the rotating shaft 9 to fix the movable chuck 4 firmly. At the same time, the slider 51 is pushed down by rotating the adjusting nut 52 until the arc-shaped bottom surface of the rubber block 53 abuts and presses against the outer edge of the material axis, and the upper, lower, left and right outer edges of the material axis are clamped, so that the material axis rotates synchronously with the chuck 3. The installation is convenient and fast, and the clamping is firm. Even if the chuck is worn out after long-term use, the material shaft end can be adjusted in time to clamp the material shaft end to prevent the material shaft from shaking when rotating. Moreover, it can cooperate with material shafts of different shapes and sizes, with a wide range of applications and good transmission effect.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safety chuck, comprising an axle seat (1) and a chuck (3), wherein the axle seat (1) comprises a base (101) and a mounting seat (102), wherein the mounting seat (102) is fixedly connected to the base (101), wherein the base (101) is provided with two connecting holes (1011), wherein a transmission shaft (2) is rotatably arranged in the middle of one side wall of the mounting seat (102), wherein the transmission shaft (2) is transmission-connected to a power device via a key, and wherein: The other side wall of the mounting seat (102) is provided with a mounting hole (1021), a connecting shaft (8) is rotatably arranged in the mounting hole (1021), one end of the connecting shaft (8) rotates synchronously with the transmission shaft (2), the chuck (3) is arranged at the other end of the connecting shaft (8), a clamping groove (31) is provided on the side wall of the chuck (3), a locking hole (32) is provided at the middle position of the bottom of the clamping groove (31), a placement groove (33) is provided on the front and rear inner walls of the clamping groove (31), a placement hole (34) is provided at the bottom of the placement groove (33), and the chuck (3) A limiting protrusion (35) is arranged on the front side, an elastic clamping mechanism (7) is arranged in the placement groove (33), an active chuck (4) is movably arranged on the outer side of the chuck (3), a mounting groove (41) is arranged on the side wall of the active chuck (4), the shape of the mounting groove (41) is adapted to the shape of the chuck (3), a through hole (42) is arranged in the middle of the bottom of the mounting groove (41), a sliding groove (45) is arranged on the top of the inner wall of the mounting groove (41), a countersunk hole (46) is arranged at the bottom of the sliding groove (45), and a clamping mechanism (5) is slidably arranged in the sliding groove (45).

2. A safety chuck according to claim 1, characterized in that: The elastic clamp mechanism (7) comprises an elastic sheet (71), both ends of the elastic sheet (71) are provided with sliding shafts (72), the other end of the sliding shaft (72) is slidably arranged in the placement hole (34), and a spring (73) is arranged between one end of the sliding shaft (72) and the bottom of the placement hole (34).

3. A safety chuck according to claim 1, characterized in that: The clamping mechanism (5) comprises a slider (51), the slider (51) is slidably arranged in a slide groove (45), a threaded connection hole (511) is provided at the top of the slider (51), a placement groove (512) is provided at the bottom of the slider (51), an adjusting nut (52) is rotatably arranged in the countersunk hole (46), an external thread is provided at the lower end of the adjusting nut (52) and is screwed with the threaded connection hole (511), a rubber block (53) is arranged in the placement groove (512), and the bottom of the rubber block (53) is arc-shaped.

4. A safety chuck according to claim 1, characterized in that: The front and rear inner walls of the mounting groove (41) are both provided with rotating holes (43), a rotating shaft (9) is rotatably arranged in the rotating hole (43), the other end of the rotating shaft (9) is rotatably arranged on the end surface of the chuck (3), the movable chuck (4) is rotatably arranged on the outside of the chuck (3) through the rotating shaft (9), and two countersunk threaded holes (44) are provided on the outer circumferential surface of the movable chuck (4), the countersunk threaded holes (44) are arranged opposite to the rotating hole (43), and a locking screw (6) is arranged in the countersunk threaded hole (44).

5. A safety chuck according to claim 4, characterized in that: The locking screw (6) comprises a top portion (61) and a threaded portion (62), wherein the threaded portion (62) is screwed into the countersunk threaded hole (44), and the diameter of the top portion (61) is smaller than the diameter of the threaded portion (62).

6. A safety chuck according to claim 2, characterized in that: The elastic sheet (71) has a U-shaped structure, and both ends thereof bulge outwards in an arc shape.

7. A safety chuck according to claim 1, characterized in that: The sliding groove (45) is a square groove.

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