Locking device for machine tool clamp

Abstract

The utility model belongs to the technical field of machine tool fixtures, and particularly relates to a locking device for a machine tool fixture, which comprises a bottom plate, a locking mechanism is arranged on the top side of the bottom plate, limiting mechanisms are symmetrically arranged at the top end of the bottom plate, a driving mechanism is arranged on the bottom side of the bottom plate, and the locking mechanism comprises a first clamping plate. Mounting bases are symmetrically fixed to the two sides of the first clamping plate, trapezoidal clamping blocks are fixed to the inner sides of the straight rods, connecting bases are fixed to one ends of the inner sides of the straight rods, pistons are fixed to one ends of the round rods, the round rods are slidably sleeved with cylinder barrels, and trapezoidal grooves are symmetrically formed in the two sides of the second clamping plate to clamp and fix a workpiece. The trapezoidal clamping blocks on the inner sides of the straight rods are buckled on the inner sides of the trapezoidal grooves, at the moment, the trapezoidal clamping blocks limit the second clamping plates, it is guaranteed that the distance between the clamping plates cannot be increased, the clamp can clamp workpieces of any size, meanwhile, the locking function can be achieved, and the problems that an existing locking device can only be suitable for workpieces of fixed sizes, and the application range is small are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine tool fixture technical field, specifically a locking device for machine tool fixture. BACKGROUND

[0002] Machine tool fixture, that is, the equipment for clamping workpieces or tools on the machine tool to ensure the position, angle and stability of the workpieces or tools during the machining process, in order to prevent the workpieces from falling off during the machining process, the fixture is usually used in cooperation with the locking device.

[0003] The utility model discloses a locking mechanism for machine tool fixture with the device body as the main body, the device body includes the placement board, the placement board top side is provided with the fixture no. 1, the placement board inboard is provided with the sliding slot, the fixture no. 1 inboard is provided with the mounting hole, the fixture no. 1 outboard is fixed with the extension block, the mounting hole inboard is connected with the hexagon bolt through the thread cooperation, the sliding slot inboard is slidably installed with the sliding block, the sliding block top side is connected with the fixture no. 2, the fixture no. 2 one end is connected with the lead screw, the fixture no. 2 outboard is fixed with the guide plate, the lead screw one end is connected with the motor, the lead screw is sleeved with the ring frame, the extension block is provided with the rotating shaft, the rotating shaft is rotatably installed with the rotating plate, the guide plate and the rotating plate inboard are respectively provided with the positioning hole, the operating table bottom side is fixed with the support leg, through the structure, when the fixture clamps and fixes the workpiece, the function of auxiliary locking can be played, so as to prevent the fixture from loosening during use.

[0004] The above-mentioned locking mechanism for machine tool fixture still has problems. After the locking structure locks the fixture, the distance between the two fixtures is fixed and cannot be adjusted, which makes the fixture only able to clamp workpieces of a fixed size, resulting in a small application range of the fixture. Therefore, a locking device for machine tool fixture is proposed. UTILITY MODEL CONTENTS

[0005] In order to overcome the shortcomings of the prior art, the locking structure on the market fixes the distance between the two fixtures after locking the fixture, and cannot be adjusted, which makes the fixture only able to clamp workpieces of a fixed size, resulting in a small application range of the fixture. Therefore, a locking device for machine tool fixture is proposed.

[0006] The utility model discloses a locking device for machine tool fixture, which comprises a bottom plate, a locking mechanism is arranged on the top side of the bottom plate, limit mechanisms are symmetrically arranged at the top end of the bottom plate, a driving mechanism is arranged on the bottom side of the bottom plate, and a first clamping plate is slidably installed at one end of the top side of the bottom plate.

[0007] Preferably, the locking mechanism comprises a first clamping plate, symmetrically fixed with mounting seats on both sides, a straight rod rotatably installed on the mounting seat, a trapezoidal clamping block fixed inside the straight rod, a connecting seat fixed at one end of the straight rod, a round rod rotatably connected to the connecting seat, a piston fixed at one end of the round rod, a cylinder sleeve slidably sleeved on the round rod, a second clamping plate slidably installed at one end of the top side of the bottom plate, trapezoidal grooves symmetrically formed on both sides of the second clamping plate, the piston slidably installed inside the cylinder sleeve, rubber pads fixed on the clamping surfaces of the first clamping plate and the second clamping plate, and the trapezoidal clamping block buckled inside the trapezoidal groove.

[0008] Preferably, the limiting mechanism comprises a fixed plate, a limiting plate slidably inserted into the bottom end of the fixed plate, a threaded rod fixed to the bottom end of the limiting plate, the fixed plate symmetrically fixed on both ends of the top side of the bottom plate, the threaded rod slidably inserted into the fixed plate, a nut rotatably connected to one end of the threaded rod through the fixed plate, and the limiting plate buckled inside the straight rod.

[0009] Preferably, the driving mechanism comprises a support plate, lead screws rotatably installed symmetrically on the inside of the support plate, servo motors fixed symmetrically on the side of the support plate, the servo motors fixedly connected to the lead screws through the support plate, the support plate symmetrically fixed on both ends of the bottom side of the bottom plate, a synchronous controller fixed on one end of the bottom side of the bottom plate, the synchronous controller signal-connected to the servo motors, rectangular grooves symmetrically formed on the top side of the bottom plate, rotating seats slidably installed inside the rectangular grooves, the rotating seats fixed on the bottom sides of the first clamping plate and the second clamping plate, the rotating seats rotatably connected to the lead screws, and the threaded directions of the lead screws on both ends being opposite.

[0010] The utility model has the advantages that:

[0011] 1. The utility model discloses a locking device for machine tool fixture, which is structurally designed, and comprises a locking mechanism.

[0012] 2.The utility model discloses a machine tool fixture locking device's structure design is through setting up limiting mechanism, completes the processing to workpiece after, can rotate nut and make it drive screw rod from fixed plate inside stretch out, to drive the limiting plate movement to make it will straight rod prop open, contact the fixation of clamp, at this moment can separate the clamp, take out workpiece, after can reverse nut, make straight rod reset, with the fixed workpiece of clamping again, this structure simple operation and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, below will to the embodiment or prior art description needed to use the drawing of simple introduction, obviously, the drawing in the following description only some embodiments of the utility model, for ordinary skilled person in the art comes, under the premise of not paying the creative labor, can also obtain other drawings according to these drawings.

[0014] Figure 1 It is the whole front view schematic diagram of three-dimensional structure;

[0015] Figure 2 It is the locking mechanism main view schematic diagram of three-dimensional structure;

[0016] Figure 3 It is the limiting mechanism side view schematic diagram of three-dimensional structure;

[0017] Figure 4 It is the driving mechanism bottom view schematic diagram of three-dimensional structure;

[0018] Figure 5 It is the whole plan view schematic diagram of three-dimensional structure.

[0019] In the drawing: 1, bottom plate;2, first clamping plate;3, second clamping plate;4, rubber pad;5, mounting seat;6, straight rod;7, trapezoidal block;8, trapezoidal groove;9, connecting seat;10, round rod;11, piston;12, cylinder;13, fixed plate;14, limiting plate;15, threaded rod;16, nut;17, rectangular groove;18, rotating seat;19, support plate;20, screw;21, servo motor;22, synchronous controller;23, spring. DETAILED DESCRIPTION

[0020] Below will combine the drawing in the embodiment of the utility model, the technical scheme in the embodiment of the utility model is clearly and completely described, obviously, the described embodiment only is a part of the embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the scope of protection of the utility model.

[0021] Please refer to Figures 1-4As shown, a locking device for machine tool clamps, comprising a base plate 1, the top side of the base plate 1 is provided with a locking mechanism, the top end of the base plate 1 is symmetrically provided with a limiting mechanism, the bottom side of the base plate 1 is provided with a driving mechanism, one end of the top side of the base plate 1 is slidably installed with a first clamping plate 2;

[0022] As shown in Figure 2 As shown, the locking mechanism comprises a first clamping plate 2, the two sides of the first clamping plate 2 are symmetrically fixed with mounting seats 5, straight rods 6 are rotatably installed on the mounting seats 5, trapezoidal clamping blocks 7 are fixed on the inner side of the straight rods 6, connecting seats 9 are fixed on one end of the inner side of the straight rods 6, circular rods 10 are rotatably connected on the connecting seats 9, pistons 11 are fixed on one end of the circular rods 10, cylinder barrels 12 are slidably sleeved on the circular rods 10, a second clamping plate 3 is slidably installed on one end of the top side of the base plate 1, trapezoidal grooves 8 are symmetrically formed on the two sides of the second clamping plate 3, the piston 11 is slidably installed on the inner side of the cylinder barrel 12, rubber pads 4 are fixed on the clamping surfaces of the first clamping plate 2 and the second clamping plate 3, and the trapezoidal clamping blocks 7 are buckled on the inner side of the trapezoidal grooves 8. When the existing locking device is used to lock the clamp, the spacing between the clamps is fixed, only the workpieces of fixed size can be used, and the applicable range is small. When the first clamping plate 2 and the second clamping plate 3 move inward at the same time, the trapezoidal clamping blocks 7 on the inner side of the straight rods 6 are buckled on the trapezoidal grooves 8 on the two sides of the second clamping plate 3, and the trapezoidal clamping blocks 7 limit the second clamping plate 3 at this time, preventing the second clamping plate 3 from moving away from the first clamping plate 2, thereby ensuring that the spacing between the clamping plates will not increase, allowing the clamp to clamp workpieces of any size while also serving as a locking function to prevent the workpiece from loosening and falling off during processing.

[0023] As shown in Figure 3 As shown, the limiting mechanism comprises a fixed plate 13, a limiting plate 14 is slidably inserted into the inner bottom end of the fixed plate 13, a threaded rod 15 is fixed to the inner bottom end of the limiting plate 14, the fixed plate 13 is symmetrically fixed to the top side of the base plate 1 at both ends, the threaded rod 15 is slidably inserted into the inner side of the fixed plate 13, a nut 16 is rotatably connected to one end of the threaded rod 15 that penetrates the fixed plate 13, and the limiting plate 14 is buckled on the inner side of the straight rod 6. When the existing locking device is used, the operation is relatively complicated. Through the structure of the limiting mechanism, after the workpiece is processed, the nut 16 can be rotated to drive the threaded rod 15 to extend out of the inner side of the fixed plate 13, thereby driving the limiting plate 14 to move and spread the straight rod 6, releasing the fixation of the clamp. At this time, the clamp can be separated and the workpiece can be removed. Then the nut 16 can be reversed to reset the straight rod 6 in order to clamp and fix the workpiece again. This structure is simple to operate and convenient to use.

[0024] As shown in Figure 4As shown, the driving mechanism includes a support plate 19, the inside of the support plate 19 is symmetrically rotatably mounted with a lead screw 20, the side of the support plate 19 is symmetrically fixed with a servo motor 21, the output end of the servo motor 21 is fixedly connected with the lead screw 20 through the support plate 19, the support plate 19 is symmetrically fixed on the bottom side of the bottom plate 1, one end of the bottom side of the bottom plate 1 is fixedly connected with a synchronous controller 22, the synchronous controller 22 is signal connected with the servo motor 21, the top side of the bottom plate 1 is symmetrically provided with a rectangular groove 17, the inside of the rectangular groove 17 is slidably mounted with a rotating seat 18, the rotating seat 18 is fixed on the bottom side of the first clamping plate 2 and the second clamping plate 3, the rotating seat 18 is rotatably connected with the lead screw 20, the thread direction of the two ends of the lead screw 20 is opposite; When the workpiece is clamped and fixed, the problem of easy loosening and falling off under uneven stress, through the structure of the driving mechanism, through the synchronous controller 22, the two side servo motors 21 can be controlled to operate at the same time, so as to drive the two side lead screws 20 to rotate at the same speed and direction, at this time, under the cooperation of the rotating seat 18, the two side clamping plates can be driven to move inward at the same time, clamping and fixing the workpiece, the structure can limit the two ends of the bottom side of the clamping plate, preventing the workpiece from loosening and falling off due to uneven stress after clamping and fixing.

[0025] Please refer to Figure 5 As shown, the cylinder 12 is fixedly connected with a spring 23 between the two ends and the straight rod 6, and the spring 23 is sleeved on the circular rod 10; When the locking structure is easy to appear position deviation under stress, through the structure of the spring 23, the two side straight rods 6 can be pulled to be buckled on the two sides of the clamping plate through the elastic force, so as to play the function of auxiliary limiting of the straight rod 6, ensuring that the position of the clamping plate can be locked during use, so as to facilitate subsequent machining of the workpiece.

[0026] Working principle: machine tool fixture, namely the machine tool for clamping workpiece or tool, so as to ensure that the position, angle and stability of workpiece or tool during machining, in order to prevent the workpiece from falling off during machining, the fixture is usually used with locking device, the existing locking structure locks the fixture, the spacing between the two clamps is fixed and cannot be adjusted, so that the clamp can only clamp the workpiece of fixed size, resulting in small application range of the clamp, in order to solve this problem, by setting the locking mechanism and the limiting mechanism, the workpiece to be clamped is placed on the top side of the bottom plate 1, the synchronous controller 22 can control the two sides of the servo motor 21 to run at the same time, so as to drive the two sides of the lead screw 20 to rotate at the same speed and direction, at this time, under the cooperation of the rotating seat 18, the first clamp plate 2 and the second clamp plate 3 can be driven to move inward at the same time, at this time, the second clamp plate 3 pushes the trapezoidal block 7 out of the trapezoidal groove 8, so that the two straight rods 6 are separated, after the workpiece is clamped and fixed, the cylinder 12 has low internal pressure, so that the piston 11 inside the cylinder 12 drives the two circular rods 10 to retract into the cylinder 12, so as to drive the straight rod 6 to tightly contact the two sides of the second clamp plate 3 under the cooperation of the connecting seat 9, at this time, the trapezoidal block 7 inside the straight rod 6 is buckled in the trapezoidal groove 8 on the two sides of the second clamp plate 3, at this time, the trapezoidal block 7 limits the second clamp plate 3 from moving away from the first clamp plate 2, so as to ensure that the spacing between the two clamp plates will not increase, so that the clamp can clamp workpieces of any size while achieving the locking function, after the workpiece is machined, the nut 16 can be rotated to drive the threaded rod 15 to extend out of the fixed plate 13, so as to drive the limiting plate 14 to move, so as to separate the straight rod 6, at this time, the servo motor 21 can be controlled to separate the two clamp plates, so as to take out the workpiece, then the nut 16 can be reversed to reset the straight rod 6, so as to clamp and fix the workpiece again, solving the problem that the existing locking device can only be used for workpieces of fixed size and has small application range.

[0027] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A locking device for a machine tool fixture, characterized by: Including the bottom plate (1), the bottom plate (1) top side is provided with locking mechanism, the bottom plate (1) top end is provided with limiting mechanism symmetrically, the bottom plate (1) bottom side is provided with drive mechanism, the bottom plate (1) top side one end is slidably installed with first clamping plate (2); The locking mechanism includes first clamping plate (2), the first clamping plate (2) both sides are fixed with mounting seat (5) symmetrically, the mounting seat (5) is rotatably installed with straight rod (6) on, the straight rod (6) inner side is fixed with trapezoidal block (7), the straight rod (6) inner side one end is fixed with connecting seat (9), the connecting seat (9) is rotatably connected with round bar (10) on, the round bar (10) one end is fixed with piston (11), the round bar (10) is slidably sleeved with cylinder (12) on, the bottom plate (1) top side one end is slidably installed with second clamping plate (3), the second clamping plate (3) both sides are symmetrically provided with trapezoidal groove (8).

2. A locking device for a machine tool fixture according to claim 1, characterized in that: The piston (11) is slidably installed in the cylinder (12) inner side, the first clamping plate (2) and the second clamping plate (3) clamping surface are fixed with rubber pad (4), the trapezoidal block (7) is buckled in the trapezoidal groove (8) inner side.

3. A locking device for a machine tool fixture according to claim 1, characterized in that: The limiting mechanism includes fixed plate (13), the fixed plate (13) inner side bottom end is slidably inserted with limiting plate (14), the limiting plate (14) inner side bottom end is fixed with threaded rod (15), the fixed plate (13) is symmetrically fixed on the bottom plate (1) top side both ends.

4. A locking device for a machine tool fixture according to claim 3, characterised in that: The threaded rod (15) is slidably inserted in the fixed plate (13) inner side, the threaded rod (15) one end is rotatably connected with nut (16) through the fixed plate (13), the limiting plate (14) is buckled in the straight rod (6) inner side.

5. A locking device for a machine tool fixture according to claim 1, characterized in that: The drive mechanism includes support plate (19), the support plate (19) inner side is rotatably installed with lead screw (20) symmetrically, the support plate (19) side is fixed with servo motor (21) symmetrically, the servo motor (21) output end is fixedly connected with lead screw (20) through support plate (19), the support plate (19) is symmetrically fixed on the bottom plate (1) bottom side both ends.

6. A locking device for a machine tool fixture according to claim 5, characterised in that: The bottom plate (1) bottom side one end is fixed with synchronous controller (22), the synchronous controller (22) is signal connected with servo motor (21), the bottom plate (1) top side is symmetrically provided with rectangular groove (17), the rectangular groove (17) inner side is slidably installed with rotating seat (18), the rotating seat (18) is fixed on the first clamping plate (2) and the second clamping plate (3) bottom side, the rotating seat (18) is rotatably connected with lead screw (20), the lead screw (20) both ends are opposite in screw direction.

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