Flexible positioning clamp for vertical machine tool

Abstract

The utility model discloses a flexible positioning fixture for a vertical machine tool. The flexible positioning fixture comprises a fixed seat; the bottom of the clamping mechanism is in sliding connection with the inner wall of the fixed seat; the outer wall of the transmission mechanism is in sliding connection with the inner wall of the fixed seat; the outer wall of the connecting pipe is fixedly connected with the outer wall of the transmission mechanism; the clamping mechanism comprises a fixing shell. The utility model relates to the technical field of machine tools. By arranging the clamping mechanism and the transmission mechanism, the workpiece presses the transmission mechanism, so that air in a soft bag is conveyed into an air bag through a connecting pipe, the air bag is expanded, a sliding rod is pushed to slide, a clamping jaw is driven to abut against the surface of the workpiece, and then the workpiece is flexibly clamped; the purpose of the flexible positioning clamp for the vertical machine tool is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a flexible positioning fixture for a vertical machine tool. Background Art

[0002] A fixture is a structure used to fix the processing object in the mechanical manufacturing process. It allows the material to occupy the correct position to accept construction or inspection. The fixture is also called a clamp. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process in the processing technology can be called a fixture, such as welding fixtures, inspection fixtures, equipment fixtures and machine tool fixtures; among them, machine tool fixtures are the most common.

[0003] However, in the prior art, the clamping force of traditional clamps is usually a fixed value. Therefore, during use, it is impossible to clamp workpieces of different weights. When clamping a heavy workpiece, the clamping force is insufficient, which may cause the workpiece to fall. In addition, traditional clamps are tightly designed, so when the jaws need to be replaced, many parts need to be removed to replace the jaws, thereby affecting the work efficiency of the staff. Utility Model Content

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the utility model to solve the technical problems is: a flexible positioning fixture for a vertical machine tool, comprising: a fixed seat; a clamping mechanism, the bottom of the clamping mechanism is slidably connected to the inner wall of the fixed seat, and the clamping mechanism is used to clamp a workpiece; a transmission mechanism, the outer wall of the transmission mechanism is slidably connected to the inner wall of the fixed seat; a connecting tube, the outer wall of the connecting tube is fixedly connected to the outer wall of the transmission mechanism; the connecting tube is made of soft material, the clamping mechanism comprises a fixed shell, the inner wall of the fixed shell is fixedly connected to an airbag, the outer wall of the airbag is fixedly connected to a sliding rod, the end of the sliding rod away from the airbag is fixedly connected to a clamping claw, the outer wall of the clamping claw is fixedly connected to an anti-slip strip, and a linear array along the outer wall of the clamping claw, the bottom of the fixed shell is fixedly connected to a sliding block, and the side of the airbag away from the sliding rod is fixedly connected to a sealing member.

[0005] Preferably, the outer wall of the slider is fixedly connected to a positioning plate, the inner wall of the positioning plate is slidably connected to a positioning pin, the outer wall of the slider is slidably connected to the inner wall of the fixed seat through a slide rail, and the slide rail is opened in the wall of the fixed seat, and the slide rail is arranged in a circular array along the central axis of the fixed seat.

[0006] Preferably, the outer wall of the locating pin is slidably connected to the inner wall of the fixing seat through a locating hole, and the locating hole is opened in the wall of the fixing seat, and the locating holes are arranged in a circular array along the central axis of the fixing seat. A round tube is provided on the side of the airbag away from the sliding rod, and a hoop is provided on the outer wall of the round tube. The outer wall of the round tube is fixedly connected to the outer wall of the connecting tube, and the outer wall of the sliding rod is slidably connected to the inner wall of the fixing shell.

[0007] Preferably, the transmission mechanism includes a pressure plate, and the transmission mechanism is provided with four groups. The inner wall of the fixed seat is fixedly connected with a soft bag, the inner wall of the fixed seat is fixedly connected with a top spring, the end of the top spring away from the fixed seat is fixedly connected with a top plate, the inner wall of the soft bag is fixedly connected with a fixed tube, the outer wall of the fixed tube is fixedly connected to the end of the connecting tube away from the circular tube, and the outer wall of the fixed tube is fixedly connected to the inner wall of the fixed seat.

[0008] Preferably, the top of the top plate contacts the bottom of the pressure plate, the outer wall of the pressure plate is slidably connected to the inner wall of the fixed seat through a slide groove, and the slide groove is opened in the wall of the fixed seat, the slide groove is arranged in a circular array along the central axis of the fixed seat, and the bottom of the top plate is fixedly connected to the top of the soft bag.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model sets a clamping mechanism and a transmission mechanism, and uses the workpiece to compress the transmission mechanism, so that the air in the soft bag is transmitted to the air bag through the connecting tube, so that the air bag expands, and then pushes the slide bar to slide, and drives the clamping claw to rest on the surface of the workpiece, and then flexibly clamps the workpiece, thereby achieving the purpose of flexible clamping and clamping workpieces of different weights, and solving the problem that the clamping force of traditional equipment cannot be adjusted.

[0011] 2. The utility model sets a clamping mechanism and uses a hoop to tightly clamp the round tube on the airbag, thereby connecting the connecting tube to the airbag, and then inserts the positioning pin through the positioning plate into the positioning hole to limit the position of the slider. The clamping mechanism can be replaced by simply releasing the lock of the hoop and pulling out the positioning pin, thereby achieving the purpose of facilitating the replacement of the clamping mechanism and solving the problem of inconvenience in replacing the clamping claws in traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model;

[0013] Figure 2 It is a cross-sectional view of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the connecting pipe of the utility model;

[0015] Figure 4It is an exploded view of the clamping mechanism of the utility model;

[0016] Figure 5 It is an exploded view of the transmission mechanism of the utility model.

[0017] In the figure: 1. fixed seat; 2. clamping mechanism; 21. fixed shell; 22. slider; 23. positioning pin; 24. clamping claw; 25. slide rod; 26. airbag; 27. sealing member; 28. round tube; 29. ​​hoop; 210. positioning plate; 3. slide groove; 4. slide rail; 5. positioning hole; 6. transmission mechanism; 61. pressure plate; 62. top plate; 63. top spring; 64. soft bag; 65. fixed tube; 7. connecting tube. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0019] Example:

[0020] See also Figure 1 - Figure 5 The utility model provides a technical solution: a flexible positioning fixture for a vertical machine tool, comprising: a fixed seat 1; a clamping mechanism 2, the bottom of the clamping mechanism 2 is slidably connected to the inner wall of the fixed seat 1; a transmission mechanism 6, the outer wall of the transmission mechanism 6 is slidably connected to the inner wall of the fixed seat 1; a connecting pipe 7, the outer wall of the connecting pipe 7 is fixedly connected to the outer wall of the transmission mechanism 6; the clamping mechanism 2 comprises a fixed shell 21, the inner wall of the fixed shell 21 is fixedly connected to an air bag 26, and a side of the air bag 26 away from the slide bar 25 is fixedly connected to an air pipe, and the air bag 26 is fixedly connected to the air pipe. The outer wall of the bag 26 is fixedly connected with a slide bar 25, and the end of the slide bar 25 away from the air bag 26 is fixedly connected with a clamping claw 24, and the material of the clamping claw 24 is a soft material. The bottom of the fixed shell 21 is fixedly connected with a slider 22, and the side of the air bag 26 away from the slide bar 25 is fixedly connected with a seal 27. The outer wall of the slider 22 is fixedly connected with a positioning plate 210, and the inner wall of the positioning plate 210 is slidably connected with a positioning pin 23. The outer wall of the slider 22 is slidably connected to the inner wall of the fixed seat 1 through a slide rail 4, and the slide rail 4 is opened in the wall of the fixed seat 1.

[0021] The outer wall of the positioning pin 23 is slidably connected to the inner wall of the fixing seat 1 through the positioning hole 5, and the positioning hole 5 is opened in the wall of the fixing seat 1. The positioning pin 23 slides into the positioning hole 5 to limit the position of the positioning plate 210. A round tube 28 is sleeved on the side of the airbag 26 away from the slide rod 25, and a hoop 29 is sleeved on the outer wall of the round tube 28. The outer wall of the round tube 28 is fixedly connected to the outer wall of the connecting tube 7, and the outer wall of the slide rod 25 is slidably connected to the inner wall of the fixing shell 21.

[0022] The transmission mechanism 6 includes a pressing plate 61, a soft bag 64 is fixedly connected to the inner wall of the fixed seat 1, a top spring 63 is fixedly connected to the inner wall of the fixed seat 1, and the top spring 63 is fixedly connected to the top plate 62 at one end away from the fixed seat 1, and the inner wall of the soft bag 64 is fixedly connected to a fixing tube 65, and the outer wall of the fixing tube 65 is fixedly connected to the end of the connecting tube 7 away from the circular tube 28, and the outer wall of the fixing tube 65 is fixedly connected to the inner wall of the fixed seat 1, and the top of the top plate 62 contacts the bottom of the pressing plate 61, and the outer wall of the pressing plate 61 is slidably connected to the inner wall of the fixed seat 1 through the slide groove 3. , and the slide groove 3 is opened in the wall of the fixed seat 1, the bottom of the top plate 62 is fixedly connected to the top of the soft bag 64, and the workpiece is used to press the soft bag 64, so that the air in the soft bag 64 is transmitted to the clamping mechanism 2. When the jaws 24 are against the workpiece, the position of the jaws 24 remains stationary, and the airbag 26 continues to expand, so that the jaws 24 are firmly against the workpiece, and because of the elasticity of the airbag 26, the four groups of jaws 24 are flexibly clamped on the surface of the workpiece, and the anti-slip strips on the jaws 24 are used to increase the friction between the jaws 24 and the workpiece.

[0023] Working principle:

[0024] When in use, first place the fixing seat 1 in the machine tool, and fix the fixing seat 1 on the workbench of the machine tool, and then the workpiece can be clamped. It should be noted that before clamping the workpiece on the fixture, it is necessary to measure the size of the workpiece, and then adjust the position of the clamping mechanism 2 so that the diameter formed by the four groups of clamping mechanisms 2 is larger than the diameter of the workpiece. Then the workpiece can be placed in the clamping mechanism 2. Under the action of the gravity of the workpiece, the workpiece presses the transmission mechanism 6, so that the air in the transmission mechanism 6 is transmitted to the clamping mechanism 2 through the connecting pipe 7, and then the clamping mechanism 2 is clamped on the surface of the workpiece. It should be noted that in the process of placing the workpiece, the hands of the staff cannot be placed in the movement direction of the clamping mechanism 2 to prevent the clamping mechanism 2 from clamping the hands of the staff. The workpiece can be hoisted by a gantry truck and placed in the clamping mechanism 2.

[0025] Before using the clamping mechanism 2 to clamp the workpiece, it is necessary to adjust the position of the four groups of clamping mechanisms 2 so that the workpiece can be placed between the clamping mechanisms 2. Simply slide the positioning pin 23 on the positioning plate 210 upward. After the positioning pin 23 slides out of the positioning hole 5, adjust the position of the slider 22 to change the position of the entire clamping mechanism 2. After the clamping mechanism 2 slides to the desired position, simply slide the positioning pin 23 back into the positioning hole 5.

[0026] During the process of clamping the workpiece, the weight of the workpiece itself presses on the pressure plate 61, thereby driving the pressure plate 61 to slide downward along the slide groove 3. During the sliding process, the pressure plate 61 synchronously compresses the top spring 63 and the soft bag 64. After the top spring 63 is compressed, the top spring 63 accumulates elastic potential energy, and after the soft bag 64 is compressed, the air in the soft bag 64 is transmitted to the connecting tube 7 through the fixed tube 65. The air entering the connecting tube 7 enters the circular tube 28 under the continuous push of subsequent air.

[0027] Because the round tube 28 is tightly fitted on the trachea on the soft bag 64 through the hoop 29, and the trachea is provided with a seal 27 to prevent leakage at the interface between the trachea and the round tube 28, the air in the round tube 28 continues to enter the airbag 26 through the trachea, thereby causing the airbag 26 to expand, thereby pushing the slide bar 25 to slide toward the workpiece. As the slide bar 25 continues to slide, the clamp 24 is pressed against the workpiece to clamp the workpiece in place.

[0028] When the workpiece is processed, it only needs to be taken out vertically to release the clamping mechanism 2 from the workpiece. When the transmission mechanism 6 lacks the pressure of the workpiece, the top spring 63 releases the elastic potential energy, thereby pushing up the pressure plate 61 through the top plate 62 and driving the soft bag 64 to reset. During the resetting process, the soft bag 64 reversely draws the air in the fixed tube 65 back into the soft bag 64, thereby resetting the air bag 26, and then driving the slide rod 25 to reset, so that the clamping of the workpiece is released.

[0029] When the clamping mechanism 2 needs to be replaced, it is only necessary to turn the screw on the hoop 29 to increase the diameter of the hoop 29, thereby releasing the lock on the round tube 28, and then the round tube 28 can be pulled out from the trachea, and then the positioning pin 23 is pulled out, and then the fixing shell 21 is slid away from the clamping claw 24 to slide the clamping mechanism 2 out of the fixing seat 1 along the slide rail 4. When installing a new clamping mechanism 2, it is only necessary to reverse the operation.

[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.

Claims

1. A flexible positioning fixture for a vertical machine tool, characterized in that: include: Fixed seat (1); A clamping mechanism (2), wherein the bottom of the clamping mechanism (2) is slidably connected to the inner wall of the fixing seat (1); A transmission mechanism (6), wherein the outer wall of the transmission mechanism (6) is slidably connected to the inner wall of the fixing seat (1); A connecting pipe (7), the outer wall of which is fixedly connected to the outer wall of the transmission mechanism (6); The clamping mechanism (2) comprises a fixed shell (21), the inner wall of the fixed shell (21) is fixedly connected to an air bag (26), the outer wall of the air bag (26) is fixedly connected to a slide bar (25), the end of the slide bar (25) away from the air bag (26) is fixedly connected to a clamping claw (24), the bottom of the fixed shell (21) is fixedly connected to a slider (22), and the side of the air bag (26) away from the slide bar (25) is fixedly connected to a sealing member (27).

2. The flexible positioning fixture for a vertical machine tool according to claim 1, characterized in that: The outer wall of the slider (22) is fixedly connected to a positioning plate (210), the inner wall of the positioning plate (210) is slidably connected to a positioning pin (23), the outer wall of the slider (22) is slidably connected to the inner wall of the fixed seat (1) via a slide rail (4), and the slide rail (4) is opened in the wall of the fixed seat (1).

3. The flexible positioning fixture for a vertical machine tool according to claim 2, characterized in that: The outer wall of the positioning pin (23) is slidably connected to the inner wall of the fixing seat (1) through a positioning hole (5), and the positioning hole (5) is opened in the wall of the fixing seat (1). A round tube (28) is sleeved on the side of the airbag (26) away from the slide rod (25), and a hoop (29) is sleeved on the outer wall of the round tube (28).

4. The flexible positioning fixture for a vertical machine tool according to claim 3, characterized in that: The outer wall of the circular tube (28) is fixedly connected to the outer wall of the connecting tube (7), and the outer wall of the sliding rod (25) is slidably connected to the inner wall of the fixed shell (21).

5. The flexible positioning fixture for a vertical machine tool according to claim 1, characterized in that: The transmission mechanism (6) comprises a pressure plate (61), a soft bag (64) is fixedly connected to the inner wall of the fixed seat (1), a top spring (63) is fixedly connected to the inner wall of the fixed seat (1), an end of the top spring (63) away from the fixed seat (1) is fixedly connected to the top plate (62), the inner wall of the soft bag (64) is fixedly connected to a fixed tube (65), the outer wall of the fixed tube (65) is fixedly connected to the end of the connecting tube (7) away from the circular tube (28), and the outer wall of the fixed tube (65) is fixedly connected to the inner wall of the fixed seat (1).

6. The flexible positioning fixture for a vertical machine tool according to claim 5, characterized in that: The top of the top plate (62) contacts the bottom of the pressure plate (61), the outer wall of the pressure plate (61) is slidably connected to the inner wall of the fixed seat (1) through a slide groove (3), and the slide groove (3) is opened in the wall of the fixed seat (1), and the bottom of the top plate (62) is fixedly connected to the top of the soft bag (64).

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