Drive mechanism for a chuck for positioning a disc-shaped workpiece

Abstract

The utility model provides a kind of chuck's driving mechanism for disc-shaped workpiece positioning, it solves the problem of existing chuck structure loose. In the utility model, chuck includes base and T-shaped support seat, and installation hole is vertically formed in support seat, driving mechanism includes a circle rocker and guide rod vertically slidingly arranged in installation hole, annular drive groove is opened on the outer wall of guide rod, the same number of strip grooves as rocker is penetrated in installation hole side wall, rocker upper end passes through corresponding strip groove and is inserted in drive groove, cover plate is horizontally fixed in installation hole, cover plate is above guide rod and gap exists between them;Guide hole is vertically opened on the top wall of guide rod, and guide hole is blind hole;Straight pipe body is vertically formed on the bottom wall of cover plate, straight pipe body lower end is inserted into guide hole, air pipe is horizontally fixed in gap, air pipe inner end communicates with straight pipe body inner hole, and air pipe outer end extends installation hole;Installation hole is further provided with spring, so that guide rod has upward moving trend. The utility model structure is compact.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a chuck driving mechanism, particularly a driving mechanism for a chuck used for positioning disc-shaped workpieces. Background Technology

[0002] When machining disc-shaped workpieces, a chuck is generally used for positioning, and the chuck usually clamps the edge of the disc-shaped workpiece to position it.

[0003] The structure of the aforementioned chuck is similar to that of an automatic high-efficiency three-jaw chuck based on a tapered shaft disclosed in the Chinese Patent Database (application number: 201821506529.0), comprising a cylinder, a base plate, a tapered shaft, three jaws, and a cylindrical seat. The cylindrical seat is fixed to the upper surface of the base plate, and has a central hole at its center that is sealed at the top and open at the bottom. The upper part of the outer wall of the cylindrical seat has three upward-sloping holes, which are evenly distributed and are blind holes, with the bottom of each hole inclined towards the central hole of the cylindrical seat. The lower part of the outer wall of the cylindrical seat has three downward-sloping holes, which are through holes and are evenly distributed radially along the cylindrical seat. The positions of the three upward-sloping holes correspond one-to-one with the three downward-sloping holes. The cylinder is placed... At the bottom of the base plate, the cylinder's output shaft passes through the base plate and connects to the bottom of the conical shaft. The conical shaft is slidably placed in the central hole of the cylindrical seat. The top of the conical shaft has three evenly distributed inclined surfaces, forming a conical structure. The three inclined surfaces correspond to the positions of the three lower straight holes. The three claws are vertically placed at the corresponding upper inclined holes and lower straight holes, and the middle parts of the three claws are rotatably connected to the middle of the outer side wall of the cylindrical seat. Each lower straight hole is provided with a sliding shaft. One end of the three sliding shafts contacts the three inclined surfaces of the conical shaft, and the other end contacts the lower part of the three claws. Each upper inclined hole is provided with an upper sliding shaft. One end of the three upper sliding shafts contacts the upper part of the three claws, and the other end is provided with a spring between it and the bottom of the corresponding upper inclined hole.

[0004] The power source for the aforementioned chuck is an external cylinder located at the bottom, resulting in a relatively large overall height of the chuck, a loose structure, and a large space occupation. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a compact drive mechanism for a chuck used for positioning disc-shaped workpieces.

[0006] The objective of this utility model can be achieved through the following technical solution: a driving mechanism for a chuck for positioning disc-shaped workpieces. The chuck includes a base and a T-shaped support fixed vertically on the base. A mounting hole is vertically formed inside the support, and the upper end of the mounting hole is open. The driving mechanism includes a rocker arm and a guide rod vertically slidably disposed within the mounting hole. An annular driving groove is formed on the upper outer wall of the guide rod. The middle part of the rocker arm is hinged to the base via a horizontally arranged pivot. The side wall of the mounting hole has the same number of strip grooves as the rocker arm. The upper end of the rocker arm passes through... The guide rod is inserted into the drive groove in a corresponding slot. The feature is that a cover plate is horizontally fixed inside the mounting hole, positioned above the guide rod with a gap between them; a guide hole is vertically formed on the top wall of the guide rod, and the guide hole is a blind hole; a straight tube is vertically formed on the bottom wall of the cover plate, with its lower end inserted into the guide hole, and a seal is formed between the straight tube and the inner wall of the guide hole via a sealing ring; an air pipe is horizontally fixed within the aforementioned gap, with its inner end connected to the inner hole of the straight tube and its outer end extending out of the mounting hole; a spring is also provided inside the mounting hole to give the guide rod an upward tendency to move.

[0007] During installation, the upper end of the rocker arm is connected to a clamping block for positioning the disc-shaped workpiece; the outer end of the air pipe is connected to an air nozzle.

[0008] In use, the disc-shaped workpiece is placed horizontally on the top wall of the support base; high-pressure gas is sent into the air pipe through the air nozzle, and the high-pressure gas enters the guide hole under the transport of the straight pipe body to push the guide rod to move downward against the spring force, thereby driving the rocker arm to swing upward so that the above-mentioned clamping block moves downward to clamp the disc-shaped workpiece; after the disc-shaped workpiece is processed, the high-pressure gas in the guide hole is extracted through the air nozzle. At this time, the guide rod moves upward to reset under the action of the spring, thereby driving the clamping block to reset through the rocker arm and releasing the disc-shaped workpiece.

[0009] This application, with the cooperation of components such as springs, guide holes, cover plates, and air pipes, forms a cylinder structure within the mounting hole for driving the guide rod to rise and fall. This effectively reduces the distance between the various components, making the entire chuck structure more compact and reducing space occupation.

[0010] In the drive mechanism of the aforementioned disc-shaped workpiece positioning chuck, the upper outer wall of the guide rod has an annular limiting seat, and the drive groove is disposed on the outer wall of the limiting seat. This design ensures the strength of the guide rod at the drive groove position and guarantees stable operation of the chuck.

[0011] In the aforementioned drive mechanism of the chuck for positioning disc-shaped workpieces, the spring is sleeved on the guide rod, and the two ends of the spring press against the bottom wall of the limit seat and the bottom wall of the mounting hole, respectively. It has the advantages of simple structure and stable operation.

[0012] In the drive mechanism of the chuck for positioning disc-shaped workpieces described above, a centering rod is vertically fixed on the top cover. The centering rod and the support base are coaxially arranged. The upper end of the centering rod is a conical head with a diameter that gradually increases from top to bottom, and the conical head extends beyond the mounting hole. In actual products, the disc-shaped workpiece is provided with a conical hole that matches the conical head, and the conical head and the conical hole cooperate to correct the position of the disc-shaped workpiece, thereby improving the machining accuracy of the disc-shaped workpiece.

[0013] In the drive mechanism of the chuck for positioning disc-shaped workpieces described above, the centering rod is detachably fixed to the cover plate. This design allows for flexibility in determining whether or not to include the centering rod based on product requirements, thus broadening its applicability.

[0014] In the drive mechanism of the chuck for positioning disc-shaped workpieces described above, the top wall of the cover plate is provided with an insertion hole that matches the lower end of the centering rod, and the lower end of the centering rod is locked in the insertion hole to facilitate the insertion and removal of the centering rod.

[0015] In the drive mechanism of the chuck for positioning disc-shaped workpieces described above, a threaded hole is radially penetrating the side wall of the straight tube, and the inner end of the air tube is screwed into the threaded hole to facilitate the assembly of the two.

[0016] Compared with existing technologies, the drive mechanism of this disc-shaped workpiece positioning chuck, with the cooperation of components such as springs, guide holes, cover plates, and air pipes, forms a cylinder structure within the mounting hole for driving the guide rod to rise and fall. This effectively reduces the distance between the various components, making the entire chuck structure more compact and reducing space occupation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of a chuck used for positioning disc-shaped workpieces.

[0018] Figure 2 This is a cross-sectional schematic diagram of a chuck used for positioning disc-shaped workpieces.

[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0020] In the diagram, 1 is the base; 2 is the support seat; 2a is the mounting hole; 2b is the strip groove; 3 is the rocker arm; 4 is the guide rod; 4a is the drive groove; 4b is the guide hole; 4c is the limit seat; 5 is the rotating shaft; 6 is the cover plate; 6a is the straight tube body; 7 is the sealing ring; 8 is the air pipe; 9 is the spring; 10 is the clamping block; 11 is the centering rod; and 11a is the conical head. Detailed Implementation

[0021] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0022] like Figure 1 and Figure 2 As shown, in the drive mechanism of the chuck for positioning disc-shaped workpieces, the chuck includes a base 1 and a T-shaped support 2 vertically fixed on the base 1. The support 2 has a vertically formed mounting hole 2a, which is coaxially arranged with the support 2 and has an open upper end.

[0023] This drive mechanism includes a ring of rockers 3 and a guide rod 4 vertically sliding within the mounting hole 2a. The ring of rockers 3 is evenly distributed around the circumference of the support base 2. In the actual product, there are three rockers 3. The lower end of the mounting hole 2a is also open, and the base 1 has a clearance hole directly opposite the mounting hole 2a. The lower end of the guide rod 4 passes through the mounting hole 2a and the clearance hole in sequence.

[0024] in,

[0025] A ring-shaped drive groove 4a is formed on the upper outer wall of the guide rod 4. The drive groove 4a and the guide rod 4 are coaxially arranged, and the vertical cross-section of the drive groove 4a is U-shaped. The middle part of the rocker arm 3 is hinged to the base 1 through a horizontally arranged pivot 5. A strip-shaped groove 2b is passed through the side wall of the mounting hole 2a, and the strip-shaped groove 2b is vertically arranged. The number of strip-shaped grooves 2b and the position of the rocker arm 3 are the same. The upper end of the rocker arm 3 passes through the corresponding strip-shaped groove 2b and is inserted into the drive groove 4a. At this time, the upper and lower side walls of the drive groove 4a are pressed against the upper end of the rocker arm 3.

[0026] like Figure 2 and Figure 3 As shown, a cover plate 6 is horizontally fixed inside the mounting hole 2a, with the cover plate 6 positioned above the guide rod 4 and a gap between them. A guide hole 4b is vertically formed on the top wall of the guide rod 4, and the guide hole 4b is a blind hole. A straight tube 6a is vertically formed on the bottom wall of the cover plate 6, with its lower end inserted into the guide hole 4b, and the straight tube 6a forms a seal with the inner wall of the guide hole 4b through a sealing ring 7. Preferably, the guide hole 4b, the guide rod 4, the straight tube 6a, and the mounting hole 2a are coaxially arranged, and the shape and size of the outer wall of the straight tube 6a match the guide hole 4b. An air pipe 8 is horizontally fixed inside the gap, with its inner end connected to the inner hole of the straight tube 6a and its outer end extending out of the mounting hole 2a; a spring 9 is also provided inside the mounting hole 2a to give the guide rod 4 an upward tendency.

[0027] During installation, the upper end of the rocker arm 3 is connected to the clamping block 10 for positioning the disc-shaped workpiece; the outer end of the air pipe 8 is connected to the air nozzle.

[0028] In use, the disc-shaped workpiece is placed horizontally on the top wall of the support base 2; high-pressure gas is sent into the air pipe 8 through the air nozzle, and the high-pressure gas enters the guide hole 4b under the transport of the straight pipe body 6a to push the guide rod 4 to move downward against the elastic force of the spring 9, thereby driving the rocker arm 3 to swing upward so that the clamping block 10 moves downward to clamp the disc-shaped workpiece; after the disc-shaped workpiece is processed, the high-pressure gas in the guide hole 4b is extracted through the air nozzle. At this time, the guide rod 4 moves upward to reset under the action of the spring 9, thereby driving the clamping block 10 to reset through the rocker arm 3, and releasing the disc-shaped workpiece.

[0029] In this application, with the cooperation of components such as spring 9, guide hole 4b, cover plate 6, and air pipe 8, a cylinder structure for driving the guide rod 4 to rise and fall is formed in the mounting hole 2a. This can effectively reduce the distance between the components, making the structure of the entire chuck more compact and reducing space occupation.

[0030] In this embodiment,

[0031] The drive groove 4a is positioned as follows: A ring-shaped limiting seat 4c is located on the upper outer wall of the guide rod 4. The limiting seat 4c and the guide rod 4 are coaxially arranged, and the drive groove 4a is located on the outer wall of the limiting seat 4c. The limiting seat 4c effectively thickens the guide rod 4 at the drive groove 4a location, ensuring the strength of the guide rod 4 at this location and ensuring stable operation of the chuck.

[0032] The spring 9 is installed as follows: the spring 9 is sleeved on the guide rod 4, and the two ends of the spring 9 press against the bottom wall of the limit seat 4c and the bottom wall of the mounting hole 2a respectively. It has the advantages of simple structure and stable operation.

[0033] The installation method of cover plate 6 is as follows: the mounting hole 2a is located on the inner wall of the upper port and has a step that matches cover plate 6. Cover plate 6 is inserted into the step and pressed on the bottom surface of the step. Cover plate 6 is fixed to support base 2 by a ring of screws.

[0034] The sealing ring 7 is an oil seal, and its installation method is as follows: an annular groove is formed on the outer wall of the straight pipe body 6a, and the annular groove and the straight pipe body 6a are coaxially arranged. The sealing ring 7 is located in the annular groove, and the outer wall of the sealing ring 7 contacts and seals the inner wall of the guide hole 4b.

[0035] The connection between the trachea 8 and the straight tube 6a is as follows: a threaded hole is radially penetrated on the side wall of the straight tube 6a, and the inner end of the trachea 8 is screwed into the threaded hole to facilitate assembly. Preferably, an O-ring is provided between the trachea 8 and the threaded hole to seal the connection between them.

[0036] like Figures 1 to 3As shown, a centering rod 11 is vertically fixed on the top cover, and the centering rod 11 and the support base 2 are coaxially arranged. The upper end of the centering rod 11 is a conical head 11a with a diameter that gradually increases from top to bottom, and the conical head 11a extends beyond the mounting hole 2a. In the actual product, the disc-shaped workpiece is provided with a conical hole that matches the conical head 11a, and the conical head 11a and the conical hole cooperate to correct the position of the disc-shaped workpiece, thereby improving the machining accuracy of the disc-shaped workpiece.

[0037] To further clarify, the centering rod 11 is detachably fixed to the cover plate 6. This design allows for flexibility in product requirements regarding the placement of the centering rod 11, thus broadening its practicality. Specifically, the top wall of the cover plate 6 has a matching insertion hole for the lower end of the centering rod 11, and the lower end of the centering rod 11 is engaged in the insertion hole for easy insertion and removal. Alternatively, the lower end of the centering rod 11 can also be fixed to the cover plate 6 via threads.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A driving mechanism for a chuck for positioning a disc-shaped workpiece, the chuck comprising a base (1) and a T-shaped support seat (2) vertically fixed on the base (1), the support seat (2) having a vertically formed mounting hole (2a) with the upper end of the mounting hole (2a) open, the driving mechanism comprising a rocker arm (3) and a guide rod (4) vertically slidably disposed in the mounting hole (2a), the guide rod (4) having an annular driving groove (4a) on the outer wall of the upper end, the rocker arm (3) being hinged to the base (1) by a horizontally disposed pivot (5), the mounting hole (2a) having a number of strip grooves (2b) the same as the rocker arm (3) passing through the side wall, the upper end of the rocker arm (3) passing through the corresponding strip groove (2b) and inserted into the driving groove (4a), characterized in that, A cover plate (6) is horizontally fixed inside the mounting hole (2a). The cover plate (6) is above the guide rod (4) and there is a gap between them. A guide hole (4b) is vertically opened on the top wall of the guide rod (4), and the guide hole (4b) is a blind hole. A straight tube (6a) is vertically formed on the bottom wall of the cover plate (6). The lower end of the straight tube (6a) is inserted into the guide hole (4b), and the straight tube (6a) forms a seal with the inner wall of the guide hole (4b) through the sealing ring (7). An air pipe (8) is horizontally fixed inside the gap. The inner end of the air pipe (8) is connected to the inner hole of the straight tube (6a), and the outer end of the air pipe (8) extends out of the mounting hole (2a). A spring (9) is also provided inside the mounting hole (2a) to make the guide rod (4) have an upward movement tendency.

2. The driving mechanism of the chuck for positioning a disc-shaped workpiece according to claim 1, characterized in that, The guide rod (4) has an annular limiting seat (4c) on its upper outer wall, and the drive groove (4a) is provided on the outer wall of the limiting seat (4c).

3. The driving mechanism of the chuck for positioning a disc-shaped workpiece according to claim 2, characterized in that, The spring (9) is sleeved on the guide rod (4), and the two ends of the spring (9) press against the bottom wall of the limit seat (4c) and the bottom wall of the mounting hole (2a) respectively.

4. The driving mechanism of the chuck for positioning a disc-shaped workpiece according to claim 1, characterized in that, A centering rod (11) is vertically fixed on the top cover. The centering rod (11) and the support base (2) are coaxially arranged. The upper end of the centering rod (11) is a cone head (11a) with a diameter that gradually increases from top to bottom, and the cone head (11a) extends out of the mounting hole (2a).

5. The driving mechanism for the chuck used for positioning a disc-shaped workpiece according to claim 4, characterized in that, The centering rod (11) and the cover plate (6) are detachably fixed together.

6. The driving mechanism for the chuck used for positioning a disc-shaped workpiece according to claim 5, characterized in that, The top wall of the cover plate (6) is provided with a socket that matches the lower end of the centering rod (11), and the lower end of the centering rod (11) is locked in the socket.

7. The driving mechanism for the chuck used for positioning a disc-shaped workpiece according to claim 1, characterized in that, The straight tube (6a) has a threaded hole that runs radially through its sidewall, and the inner end of the air tube (8) is screwed into the threaded hole.

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