CN220178201U - Three-grab positioning tool - Google Patents

Abstract

The utility model discloses a three-grab positioning tool, which relates to the field of three-grab chucks and comprises a chuck body, wherein a plurality of clamping blocks are connected to the front surface of the chuck body in a sliding manner, a plurality of groups of screw rods which are respectively matched with the clamping blocks are connected to the inside of the chuck body in a rotating manner, a rotating sleeve is connected to the middle of the chuck body in a rotating manner, a second bevel gear is connected to one end, close to the rotating sleeve, of each screw rod, and a first bevel gear meshed with the second bevel gear is connected to the rotating sleeve. According to the chuck, the torsional spring disc, the rotating sleeve and the screw rod are arranged in the middle of the chuck body, the clamping block is in a closed state in a normal state, the workpiece presses the screw rod to drive the rotating sleeve to rotate so that the clamping block is opened, meanwhile, the torsional spring disc stores force, after the workpiece is in contact with the chuck body, the screw rod is not pressed any more, the torsional spring disc drives the rotating sleeve to rotate reversely so that the clamping block pre-clamps the workpiece, part of the gravity of the workpiece is born, and meanwhile, when the workpiece is pressed down, the clamp is used for positioning the workpiece, so that the workpiece is positioned in the middle of the chuck body.

Description

Three-grab positioning tool

Technical Field

The utility model relates to the field of three-grab chucks, in particular to a three-grab positioning tool.

Background

The three-jaw chuck consists of a chuck body, movable jaws and a jaw driving mechanism, threads are meshed with plane threads on the back surface of the bevel disk gear below three jaw guiding parts on the three-jaw chuck, when the bevel disk gear is rotated by a spanner through a square hole, the bevel disk gear rotates, and the plane threads on the back surface drive the three jaws to approach or withdraw from the center at the same time so as to clamp workpieces with different diameters.

The existing three-grabbing chuck positioning device generally comprises clamping jaws and a driving part, the clamping jaws are pushed to move inwards to clamp and position a workpiece through rotation of a screw rod, the clamping jaws are pushed outwards by gravity of the workpiece, and the screw rod is difficult to push by the clamping jaws to rotate due to a thread structure, so that the workpiece is prevented from falling off.

However, when the existing three-grip chuck clamps a workpiece, the workpiece is often not in the center when the workpiece is aligned to the chuck, the workpiece is required to be pushed to the middle of the three-grip chuck through the movement of the clamping jaw, the workpiece is supported by the full force of one hand of a user, and the driving part is screwed and rotated by the other hand to clamp the workpiece, so that the use is inconvenient.

Disclosure of Invention

Based on the above, the utility model aims to provide a three-grab positioning tool, which solves the technical problems that when the existing three-grab chuck clamps a workpiece, the workpiece is often not in the center when the workpiece is aligned to the chuck, the workpiece is required to be pushed to the middle of the three-grab chuck through the movement of a clamping jaw, the workpiece is supported by a user with one hand in full force, and the workpiece is clamped by the driving part by screwing the other hand, so that the use is inconvenient.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a three location frock of grabbing, includes the chuck body, the front sliding connection of chuck body has the polylith clamp splice, and the inside rotation of chuck body is connected with multiunit respectively with clamp splice complex lead screw, the centre rotation of chuck body is connected with changeing the cover, the one end that is close to of lead screw changes the cover all is connected with second bevel gear, and changes to overlap to be connected with second bevel gear engaged first bevel gear, the inside threaded connection who changes the cover has the screw rod, and is connected with the spring post between the tail end of screw rod and the chuck body, the internal connection of chuck body has the torsional spring dish, and the torsional spring dish is connected with changeing the cover.

The utility model is further arranged that the tail end of the chuck body is connected with a mounting column, and the mounting column is provided with a clamping groove for fixing.

The utility model is further arranged that one end of each group of screw rods far away from the second bevel gear is provided with meshed gears which are meshed with each other in a rotating way, and the diameters of the meshed gears are equal.

The chuck is further characterized in that a driving toothed ring matched with one meshing gear in each group of meshing gears is rotatably connected inside the chuck body, and a plurality of driving rotating rods meshed with the driving toothed ring are rotatably connected to the chuck body.

The utility model further provides that a plurality of the driving rotating rods are uniformly arranged.

The utility model is further arranged that the front surface of the screw is rotationally connected with the pressing plate, and damping is arranged between the pressing plate and the screw.

In summary, the utility model has the following advantages:

according to the chuck, the torsional spring disc, the rotating sleeve and the screw rod are arranged in the middle of the chuck body, the clamping block is in a closed state in a normal state, the workpiece presses the screw rod to drive the rotating sleeve to rotate so that the clamping block is opened, meanwhile, the torsional spring disc stores force, after the workpiece is in contact with the chuck body, the screw rod is not pressed any more, the torsional spring disc drives the rotating sleeve to rotate reversely so that the clamping block pre-clamps the workpiece, part of the gravity of the workpiece is born, and meanwhile, when the workpiece is pressed down, the clamp is used for positioning the workpiece, so that the workpiece is positioned in the middle of the chuck body.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

fig. 3 is an enlarged view of fig. 2 a in accordance with the present utility model.

In the figure: 1. a chuck body; 2. clamping blocks; 3. a screw rod; 4. a meshing gear; 5. driving the toothed ring; 6. driving the rotating rod; 7. a torsion spring disc; 8. a rotating sleeve; 9. a first bevel gear; 10. a second bevel gear; 11. a screw; 12. a pressing plate; 13. a mounting column; 14. and a spring column.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance;

in the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.

1-3, including chuck body 1, chuck body 1's centre rotates and is connected with the change cover 8, change cover 8's inside threaded connection has screw rod 11, screw rod 11's front rotates and is connected with clamp plate 12, and be provided with the damping between clamp plate 12 and the screw rod 11, and be connected with spring post 14 between the tail end of screw rod 11 and chuck body 1, chuck body 1's internal connection has torsional spring dish 7, and torsional spring dish 7 is connected with change cover 8, during the use, use work piece extrusion clamp plate 12, drive screw rod 11 to chuck body 1 inside movement, because of the damping between screw rod 11 and the clamp plate 12 prevents screw rod 11 rotation, screw rod 11 moves to chuck body 1 and drives change cover 8 rotation, make torsional spring dish 7 energy storage, chuck body 1's front sliding connection has polylith clamp piece 2, and chuck body 1 inside rotates and is connected with multiunit lead screw 3 with each clamp piece 2 respectively, the one end that is close to change cover 8 of lead screw rod 3 all is connected with second bevel gear 10, and be connected with on the change cover 8 with the first bevel gear 9 with second bevel gear 10 meshing simultaneously, when work piece extrusion bevel gear 8 rotates through first bevel gear 9 between clamp plate 2 makes work piece 2 rotate, make the work piece 2 rotate and rotate clamp piece 10 and rotate through the bevel gear 10 and rotate, the clamp piece is held in contact with the bevel gear 10 and the work piece is opened, when the work piece is held in the work piece is rotated and the clamp piece is rotated and the work piece is made and the work piece is rotated;

one end of the clamping block 2 is provided with an inclined plane, when the workpiece presses the pressing plate 12, the workpiece contacts with the inclined plane of the clamping block 2, and the inclined plane of the clamping block 2 can also guide the workpiece, so that the workpiece is always positioned in the middle of the chuck body 1;

the inside rotation of chuck body 1 is connected with the drive ring gear 5 with the cooperation of one meshing gear 4 in every meshing gear 4, and the last rotation of chuck body 1 is connected with many drive bull stick 6 with the meshing of drive ring gear 5, and rethread twists and rotates drive bull stick 6 and drive meshing gear 4 rotation through drive ring gear 5 for clamp splice 2 is with the work piece clamp tightly.

The driving rotating rods 6 are uniformly arranged, so that the balance weight of the device is balanced as much as possible, the centrifugal force generated during rotation of the chuck is reduced, the diameters of the meshing gears 4 are equal, the screw rods 3 synchronously rotate, and the clamping blocks 2 move more synchronously and stably.

Based on the above structure, in this embodiment, the tail end of the chuck body 1 is connected with a mounting post 13, and the mounting post 13 is provided with a clamping groove for fixing, so as to mount the device on an apparatus such as a milling machine.

Although embodiments of the utility model have been shown and described, the detailed description is to be construed as exemplary only and is not limiting of the utility model as the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples, and modifications, substitutions, variations, etc. may be made in the embodiments as desired by those skilled in the art without departing from the principles and spirit of the utility model, provided that such modifications are within the scope of the appended claims.

Claims (6)

1. The utility model provides a three location frock of grabbing, includes chuck body (1), its characterized in that: the chuck is characterized in that the front of the chuck body (1) is slidably connected with a plurality of clamping blocks (2), a plurality of groups of screw rods (3) which are matched with the clamping blocks (2) are rotationally connected inside the chuck body (1), a rotating sleeve (8) is rotationally connected in the middle of the chuck body (1), one end, close to the rotating sleeve (8), of the screw rods (3) is connected with a second bevel gear (10), the rotating sleeve (8) is connected with a first bevel gear (9) meshed with the second bevel gear (10), the inner threads of the rotating sleeve (8) are connected with a screw rod (11), a spring column (14) is connected between the tail end of the screw rod (11) and the chuck body (1), a torsion spring disc (7) is connected inside the chuck body (1), and the torsion spring disc (7) is connected with the rotating sleeve (8).

2. The three-grab positioning tool according to claim 1, wherein: the tail end of the chuck body (1) is connected with a mounting column (13), and a clamping groove for fixing is formed in the mounting column (13).

3. The three-grab positioning tool according to claim 1, wherein: one end of each group of screw rods (3) far away from the second bevel gear (10) is provided with meshed gears (4) which are meshed with each other in a rotating mode, and the diameters of the meshed gears (4) are equal.

4. The three-grab positioning tool according to claim 1, wherein: the chuck is characterized in that a driving toothed ring (5) matched with one meshing gear (4) in each group of meshing gears (4) is rotationally connected inside the chuck body (1), and a plurality of driving rotating rods (6) meshed with the driving toothed ring (5) are rotationally connected to the chuck body (1).

5. The three-grab positioning tool according to claim 4, wherein: the plurality of driving rotating rods (6) are uniformly arranged.

6. The three-grab positioning tool according to claim 1, wherein: the front of the screw rod (11) is rotationally connected with a pressing plate (12), and damping is arranged between the pressing plate (12) and the screw rod (11).