Axle head structure A of electric spark machine tool

Abstract

The utility model discloses an electric spark machine tool A shaft head structure which comprises a support and a chuck rotationally installed on the support, three clamping jaws are movably installed at the head end of the chuck, a fluted disc is rotationally installed in the chuck, spiral teeth meshed with the clamping jaws are arranged on the head end face of the fluted disc, and the clamping jaws are connected with the fluted disc. The outer edge of the tail end of the fluted disc is connected with three gears in a meshed mode, the gears are rotationally connected with a chuck through adjusting shafts, a connecting cylinder is arranged at the tail end of the chuck, a worm wheel disc is fixed outside the connecting cylinder, the lower portion of the worm wheel disc is connected with a worm in a meshed mode, and a main motor for driving the worm to rotate is installed outside the support. The hollow chuck is arranged, the long-rod-shaped workpiece can penetrate through the middle of the interior of the chuck when clamped, the chuck can not only clamp one end of the long-rod-shaped workpiece any more, and the long-rod-shaped workpiece can be clamped and fixed at any position of the long-rod-shaped workpiece, so that the length of the long-rod-shaped workpiece extending out of the head end of the chuck is reduced; and therefore, the problem that the long-rod-shaped workpiece vibrates and shakes during rotation can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lathe machining technical field especially a kind of electric spark machine tool A shaft head structure. BACKGROUND

[0002] Electric spark machine tool is a kind of electro-erosion equipment using electric spark discharge principle to carry out high-precision metal processing, and its basic principle is to use free positive ions and electrons to accumulate in field, quickly form a ionized conductive channel, cause countless collisions between particles, form a plasma zone, and quickly rise to 8000 to 12000 degrees high temperature, so that the surface of two conductors is instantaneously melted some materials. Electric spark machine tool A shaft refers to the workpiece fixing shaft that can rotate along X axis, so as to realize more complex processing angle and shape.

[0003] However, the existing A shaft structure can only clamp and fix one end of workpiece when in use, for long rod-shaped workpiece, only one end is fixed by A shaft, and when another end needs to be processed, A shaft drives such long rod workpiece to rotate, and the end of long rod far away from A shaft is prone to shake and vibrate in the rotating process, thereby causing processing position to deviate and dislocate, and affecting the accuracy of processing.

[0004] Therefore, we propose a kind of electric spark machine tool A shaft head structure to solve the above problems. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a kind of electric spark machine tool A shaft head structure to solve the problems raised in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of electric spark machine tool A shaft head structure, including support and chuck rotationally installed on support, the head end of the chuck movably installs three clamping jaws, and the inside of the chuck rotationally installs gear disc, the head end of the gear disc is equipped with the helical tooth that is mutually engaged with clamping jaw, and the tail end outer edge of the gear disc is engaged with three gears, the gear is rotationally connected with chuck by adjusting shaft, the tail end of the chuck is equipped with connecting cylinder, the connecting cylinder is fixed with worm wheel outside, and the worm wheel is engaged with worm below, the support is installed with main motor of driving worm rotation outside;

[0008] The tail side of the support is fixed with underframe, and vice motor is installed on the side plate of underframe, the support is rotationally connected with screw rod, and the screw rod is externally threaded with sliding seat, the sliding seat is connected with support frame, and the support frame is fixed with bracket, a pair of rollers are rotationally installed on the bracket.

[0009] In further embodiments, the sliding contact surface of the chuck and the clamping jaw is provided with a lubricating coating.

[0010] In further embodiments, the adjusting shaft does not protrude from the outer circumferential sidewall of the chuck, and a hexagonal groove is formed in the adjusting shaft.

[0011] In further embodiments, the connecting cylinder and the support are connected through a bearing, and the outer diameter of the bearing is 2-5mm larger than the outer diameter of the worm wheel disc.

[0012] In further embodiments, an installation cavity is formed in the support, and the worm is rotatably installed in the installation cavity, and the installation cavity penetrates the bottom surface of the installation hole of the support.

[0013] In further embodiments, a guide rod parallel to the screw rod is further installed on the base frame, and the guide rod slidably penetrates the inside of the sliding seat.

[0014] In further embodiments, the support frame is an electric push rod.

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The hollow chuck is provided in the utility model, so that the long rod-shaped workpiece can penetrate in the middle of the chuck when being clamped, the chuck can clamp and fix the long rod-shaped workpiece at any position instead of clamping only one end of the long rod-shaped workpiece, thereby reducing the length of the long rod-shaped workpiece extending from the head end of the chuck, and further reducing the problem of shaking and trembling of the long rod-shaped workpiece when rotating, and the roller moving along the axial direction of the chuck can assist in supporting the part of the long rod-shaped workpiece extending from the tail end of the chuck, and further improving the stability of the long rod-shaped workpiece when rotating. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a right side view of the utility model;

[0018] Figure 2 It is a left side view of the utility model;

[0019] Figure 3 It is a tail end structure diagram of the chuck of the utility model;

[0020] Figure 4 It is an internal structure diagram of the chuck of the utility model;

[0021] Figure 5 It is a support structure diagram of the utility model.

[0022] In the figure: 1, support; 2, chuck; 3, chuck jaw; 4, toothed disc; 5, gear; 6, adjusting shaft; 7, connecting cylinder; 8, worm disc; 9, worm; 10, main motor; 11, underframe; 12, auxiliary motor; 13, screw rod; 14, sliding seat; 15, support frame; 16, bracket; 17, roller; 18, guide rod; 19, bearing; 20, mounting cavity. DETAILED DESCRIPTION

[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0024] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting" and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] Please refer to Figures 1-5The utility model provides an electric spark machine tool A axle head structure, including support 1 and chuck 2 of rotation installation on support 1, the head end of chuck 2 movably installs three clamping jaws 3, three clamping jaws 3 are symmetrically distributed, and clamping jaw 3 can slide along the radial direction of chuck 2, the inside rotation of chuck 2 is installed gear 4, and the axial line of gear 4 coincides with the axial line of chuck 2, and the head end surface of gear 4 is provided with the helical tooth that is engaged with clamping jaw 3, so that when gear 4 rotates, clamping jaw 3 can be moved along the radial direction of chuck 2 under the action of helical tooth and the limiting action of the shell of chuck 2, realize shrinkage or open, specifically, the sliding contact surface of chuck 2 and clamping jaw 3 is all provided with lubricating coating, to further improve the smoothness when clamping jaw 3 slides, and the tail end outer edge of gear 4 is provided with a circle of meshing teeth, and the meshing teeth are engaged with three symmetrical gears 5, and the axial direction of gear 5 is perpendicular to the axial direction of gear 4, and gear 5 is rotationally connected with chuck 2 through adjusting shaft 6, and the axial direction of adjusting shaft 6 is consistent with the radial direction of chuck 2.

[0027] Further, adjusting shaft 6 does not protrude from the outer circumferential side wall of chuck 2, and a hexagonal groove is formed in adjusting shaft 6, so that an auxiliary tool can be inserted into the hexagonal groove to control the rotation of adjusting shaft 6, preventing the protruding adjusting shaft 6 from being easily touched by mistake.

[0028] The tail end of chuck 2 is provided with a connecting cylinder 7, the connecting cylinder 7 is externally fixed with a worm wheel disc 8, and the worm wheel disc 8 is engaged with a worm 9 below, specifically, an installation cavity 20 is formed in the inside of support 1, the worm 9 is rotationally installed in the installation cavity 20, and the installation cavity 20 penetrates the bottom surface of the mounting hole of the support 1, so as to facilitate the engagement of the worm wheel disc 8 and the worm 9, a main motor 10 is installed outside the support 1 to drive the rotation of the worm 9, the output shaft of the main motor 10 is coaxially connected with the worm 9, so as to drive the rotation of the worm 9, and the rotation of the worm 9 drives the rotation of the worm wheel disc 8, so as to rotate the chuck 2 relative to the support 1.

[0029] Specifically, the connecting cylinder 7 and the support 1 are connected through a bearing 19, so as to ensure the stability of the rotation of the connecting cylinder 7, and the outer diameter of the bearing 19 is 2-5mm larger than the outer diameter of the worm wheel disc 8, so that after the installation of the bearing 19, there is a certain gap between the worm wheel disc 8 and the mounting shaft hole of the support 1, facilitating the rotation of the worm wheel disc 8.

[0030] The tail side of the support 1 is fixed with a chassis 11, and a side plate of the chassis 11 is installed with a sub-motor 12, the support 1 is rotationally connected with a screw rod 13, one end of the screw rod 13 is connected with an output shaft of the sub-motor 12, and the screw rod 13 is externally threaded with a sliding seat 14, the sliding seat 14 is connected with a support frame 15, and the support frame 15 is fixed with a bracket 16, the bracket 16 is rotationally installed with a pair of rollers 17, the front and rear center longitudinal surfaces of the pair of rollers 17 are consistent with the center longitudinal surface of the chuck 2, so as to hold the tail section of the long rod by the two rollers 17, and the rotation is more stable, and since the sliding seat 14 can move along the screw rod 13, the supporting position can also be adjusted, so as to meet the needs of workpieces of different lengths.

[0031] Further, the chassis 11 is also installed with a guide rod 18 parallel to the screw rod 13, and the guide rod 18 slides through the inside of the sliding seat 14, so as to limit the sliding seat 14, so that the sliding seat 14 is not easy to deviate and dislocate, and the stability during movement is ensured.

[0032] At the same time, considering that in order to match long rod-shaped workpieces of different diameters, the support frame 15 is provided with an electric push rod, so as to adjust the supporting height of the roller 17.

[0033] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0034] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A spindle head structure for an electrical discharge machine tool, comprising a support (1) and a chuck (2) rotatably mounted on the support (1), characterized in that: The chuck (2) has three pawls (3) movably mounted at its head end, and a gear plate (4) is rotatably mounted inside the chuck (2). The head end face of the gear plate (4) is provided with helical teeth that mesh with the pawls (3), and three gears (5) are meshed and connected to the outer edge of the tail end of the gear plate (4). The gears (5) are rotatably connected to the chuck (2) through an adjusting shaft (6). The tail end of the chuck (2) is provided with a connecting cylinder (7), and a worm gear (8) is fixed outside the connecting cylinder (7). The worm gear (8) is meshed and connected to a worm (9) below. A main motor (10) that drives the worm (9) to rotate is installed outside the support (1). A base frame (11) is fixed to the tail side of the support (1), and an auxiliary motor (12) is installed on the side plate of the base frame (11). A screw (13) is rotatably connected to the support (1), and a slide (14) is screwed onto the external thread of the screw (13). A support frame (15) is connected to the slide (14), and a bracket (16) is fixed on the support frame (15). A pair of rollers (17) are rotatably installed on the bracket (16).

2. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The sliding contact surfaces of the chuck (2) and the jaws (3) are both provided with a lubricating coating.

3. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The adjusting shaft (6) does not protrude from the outer circumferential sidewall of the chuck (2), and a hexagonal groove is provided inside the adjusting shaft (6).

4. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The connecting cylinder (7) and the support (1) are connected by a bearing (19), and the outer ring diameter of the bearing (19) is 2-5 mm larger than the outer ring diameter of the worm gear disc (8).

5. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The support (1) has an installation cavity (20) inside, and the worm (9) is rotatably installed in the installation cavity (20), and the installation cavity (20) passes through the bottom surface of the installation hole of the support (1).

6. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The base frame (11) is also equipped with a guide rod (18) that is parallel to the screw (13), and the guide rod (18) slides through the interior of the slide block (14).

7. The structure of the A-axis head of an EDM machine tool according to claim 1, characterized in that: The support frame (15) uses an electric push rod.

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