Double-station five-claw clamp

Abstract

The utility model provides a double-station five-claw clamp, which belongs to the technical field of machine tool clamps and comprises a chuck body, a driving component and a clamp component. The chuck body is of a cavity structure, a constant acceleration disc is rotationally connected into the chuck body and provided with teeth and arc-shaped grooves distributed in the axial direction of the constant acceleration disc, the driving assembly comprises a rack and hydraulic cylinders located at the two ends of the rack, the rack is meshed with the teeth, and the hydraulic cylinders are fixedly connected to the chuck body; sliding grooves corresponding to the arc-shaped grooves and the clamp pieces are formed in the chuck body, one end of the rotating shaft is connected to the clamp pieces, and the other end of the rotating shaft penetrates through the sliding grooves and enters the arc-shaped grooves. The clamp can realize the function of automatically centering and clamping a workpiece by a machining center, can obviously improve the labor efficiency, reduces the physical labor, and completely realizes automation. Installation is convenient, the power source is directly installed on an existing machining center machine tool workbench, and the power source is connected with a machine tool power source through a pipe connector.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool fixtures, in particular to a double-station five-claw fixture. Background Art

[0002] Existing vertical lathes rely on tooling such as pressure plates to hold the workpiece in place, making them incapable of accurately achieving the automatic centering and clamping functions of a machining center. Installing a conventional vertical lathe chuck requires modifying the worktable, drilling a hole in it, digging a trench beneath the machine, and then installing a supporting hydraulic cylinder in the trench. This would then be connected to the vertical lathe chuck via a tie rod, and an oil line would also be required to connect it to the cylinder below. This solution is complex and difficult to implement. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a double-station five-jaw clamp, which aims to improve the problem that the machining center cannot realize automatic centering and automatic clamping of the workpiece.

[0004] The utility model is implemented as follows: the utility model provides a double-station five-jaw clamp, which comprises a chuck body, a drive assembly and a clamp assembly.

[0005] The chuck body is a hollow structure, in which a constant acceleration disk is rotatably connected. The constant acceleration disk has teeth and arc grooves distributed along its axial direction.

[0006] The driving assembly includes a rack and hydraulic cylinders located at both ends of the rack, the rack is engaged with the teeth, and the hydraulic cylinders are fixedly connected to the chuck body.

[0007] The clamp assembly includes a rotating shaft and a clamp member. The chuck body is provided with a slide groove corresponding to the arc groove and the clamp member. One end of the rotating shaft is connected to the clamp member, and the other end passes through the slide groove and enters the arc groove.

[0008] In an embodiment of the present invention, five arc-shaped grooves are provided.

[0009] In one embodiment of the present invention, the clamp member includes a slider, a claw seat and a claw connected in sequence, the slider is fixedly connected to the rotating shaft and can slide along the length direction of the slide groove, and the claw seat is detachable from the slider.

[0010] In one embodiment of the present invention, the slide groove and the bottom end of the claw seat have matching corrugations.

[0011] In one embodiment of the present invention, the sliding block has a T-shaped block, and the claw seat is connected to the T-shaped block via bolts.

[0012] The beneficial effects of the present invention are as follows: the present invention obtains a double-station five-jaw clamp through the above design. When in use, the chuck is pushed by the pistons of the left and right hydraulic cylinders, driving the rack to move left and right, generating a push-pull force, thereby driving the rack to rotate the equal acceleration disk. The equal acceleration disk is provided with five arc-shaped grooves, each inlaid with a rotating shaft, so that the rotating shaft moves along the length of the arc, thereby driving the slider and the clamping claw to move radially at the same time, realizing the self-centering clamping and loosening of the workpiece, and realizing the function of automatic centering and clamping of the workpiece in the machining center, which can significantly improve labor efficiency, reduce physical labor, and fully realize automation. It is easy to install and can be directly installed on the existing machining center machine tool workbench. The power source and the machine tool power source can be connected through a pipe joint.

[0013] The details are as follows:

[0014] 1. Research on key technologies such as self-centering mechanism, precision retention, clamping force characteristics, rack and pinion torque transmission, and oil distribution of high-precision power chucks with good dynamic characteristics.

[0015] 2. Research on materials and fitting accuracy to solve the problem of severe wear of the transmission structure during use and improve the self-centering accuracy and service life of large vertical CNC chucks.

[0016] 3. Through the analysis of common technologies such as combined materials and mechanical properties, the chuck structure, gear transmission and synchronous centering mechanism are optimized to complete the synchronous self-centering clamping function of the chuck.

[0017] 4. Through calculation and analysis of the hydraulic system and torque transmission, the matching dimensions of the hydraulic cylinder, rack, accelerator plate and other parts of the chuck are adjusted to improve the performance of the chuck; the technical conditions such as the materials of the main parts and heat treatment are analyzed to increase the service life of the chuck.

[0018] 5. Computer simulation is used to verify the various technical performance indicators of the chuck. Based on the above research and analysis, a hydraulic power source is used on the chuck, which has a built-in dual hydraulic cylinder. The rack drive drives the accelerator plate to rotate, and the torque is transmitted to move the chuck slider, driving the jaws to clamp and release the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1This is a schematic diagram of the overall structure of a double-station five-jaw clamp provided by an embodiment of the utility model;

[0021] Figure 2 A schematic side cross-sectional structure diagram of a double-station five-jaw fixture provided by an embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the structure of a medium acceleration disk of a double-station five-jaw fixture provided by an embodiment of the utility model;

[0023] In the figure: 100 - chuck body; 110 - equal acceleration plate; 111 - teeth; 112 - arc groove; 120 - slide groove; 121 - corrugation; 200 - drive assembly; 210 - rack; 220 - hydraulic cylinder; 300 - clamp assembly; 310 - rotating shaft; 320 - clamp member; 321 - slider; 3211 - T-block; 322 - claw seat; 323 - claw. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] See also Figure 1 The utility model provides a technical solution: a double-station five-jaw clamp, including a chuck body 100, a drive assembly 200 and a clamp assembly 300.

[0027] Among them, see Figure 1 The chuck body 100 serves as a carrier of the fixture and can be fixedly connected and installed with the machine tool. The drive assembly 200 serves as a power source to regulate the tightening or loosening of the workpiece by the fixture assembly 300. The fixture assembly 300 is used to operate the workpiece so that it can automatically complete the self-centering clamping function of the chuck.

[0028] See also Figure 1 and Figure 3 The chuck body 100 is a hollow structure, in which an equal acceleration disk 110 is rotatably connected. The equal acceleration disk 110 has teeth 111 and arc grooves 112 distributed along its own axial direction. Specifically, there are five arc grooves 112, which can clamp and center the workpiece in all directions from five different directions.

[0029] See also Figure 1 and Figure 2 The drive assembly 200 includes a rack 210 and hydraulic cylinders 220 located at both ends of the rack 210. The rack 210 meshes with the teeth 111, and the hydraulic cylinders 220 are fixedly connected to the chuck body 100. The piston rods of the hydraulic cylinders 220 on both sides move in the forward direction, one pushing and the other retreating, and can assist each other to better drive the rack 210 to move. At the same time, the accelerator plate 110 is transmitted through the rack 210 to better transmit a large torque. Moreover, the chuck body 100 has its own left and right hydraulic cylinders 220, which solves the problem of the vertical machine tool work surface being unable to install a power source.

[0030] See also Figure 1 、 Figure 2 and Figure 3 The clamp assembly 300 includes a rotating shaft 310 and a clamp part 320. The chuck body 100 is provided with a slide groove 120 corresponding to the arc groove 112 and the clamp part 320. One end of the rotating shaft 310 is connected to the clamp part 320, and the other end passes through the slide groove 120 and enters the arc groove 112. Specifically, the clamp part 320 includes a slider 321, a claw seat 322 and a claw 323 connected in sequence. The slider 321 is fixedly connected to the rotating shaft 310 and can slide along the length direction of the slide groove 120. The claw seat 322 is detachable from the slider 321. When the arc groove 112 rotates, it will push the rotating shaft 310 to move along the slide groove 120, and then drive the slider 321 to move. At the same time, the claw 323 on the claw seat 322 can realize the centering clamping function of the workpiece. Specifically, the chute 120 and the bottom of the claw seat 322 have matching corrugations 121. These corrugations 121 increase the friction between the claw seat 322 and the chute 120, preventing the claw 323 from loosening its grip on the workpiece under external forces. The slider 321 has a T-shaped block 3211, and the claw seat 322 is connected to the T-shaped block 3211 via bolts, allowing for quick assembly and disassembly. In the event of severe wear, parts can be replaced promptly.

[0031] Specifically, the working principle of the double-station five-jaw clamp is as follows: the chuck body 100 is pushed by the pistons of the left and right hydraulic cylinders 220, driving the rack 210 to move left and right, generating a push-pull force, so that the rack 210 drives the acceleration disk 110 to rotate in the chuck body 100. Since there are five arc grooves 112 in the acceleration disk 110, and there are slide grooves 120 corresponding to the arc grooves 112 on the chuck body 100, the two cooperate to make the acceleration disk 110 rotate and drive the rotating shaft 310 to move along the length of the arc. At the same time, under the action of the slide groove 120, the rotating shaft 310 will move along the slide groove 120, thereby driving the slider 321 and the claw 323 to produce radial movement at the same time, realizing self-centering clamping and loosening of the workpiece.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A double-station five-jaw clamp, characterized in that: include A chuck body (100) is a hollow structure, wherein an equal acceleration disk (110) is rotatably connected therein, wherein the equal acceleration disk (110) has teeth (111) and arc-shaped grooves (112) distributed along its own axial direction. A driving assembly (200), the driving assembly (200) comprising a rack (210) and hydraulic cylinders (220) located at both ends of the rack (210), the rack (210) being engaged with the teeth (111), and the hydraulic cylinders (220) being fixedly connected to the chuck body (100); A clamp assembly (300), the clamp assembly (300) includes a rotating shaft (310) and a clamp member (320), the chuck body (100) is provided with a slide groove (120) corresponding to the arc groove (112) and the clamp member (320), one end of the rotating shaft (310) is connected to the clamp member (320), and the other end passes through the slide groove (120) and enters the arc groove (112).

2. A double-station five-jaw clamp according to claim 1, characterized in that: There are five arc-shaped grooves (112).

3. A double-station five-jaw clamp according to claim 1, characterized in that: The clamping member (320) includes a slider (321), a claw seat (322) and a claw (323) connected in sequence. The slider (321) is fixedly connected to the rotating shaft (310) and can slide along the length direction of the sliding groove (120). The claw seat (322) is detachable from the slider (321).

4. A double-station five-jaw clamp according to claim 3, characterized in that: The sliding groove (120) and the bottom end of the claw seat (322) have matching corrugations (121).

5. A double-station five-jaw clamp according to claim 3, characterized in that: The sliding block (321) has a T-shaped block (3211), and the claw seat (322) is connected to the T-shaped block (3211) via bolts.

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