Three-jaw self-centering pneumatic tool

Abstract

The utility model discloses a three-jaw self-centering pneumatic tool which comprises a three-jaw supporting seat, three movable clamping blocks, a linear guide rail assembly, a lead screw assembly, a bevel gear and a pneumatic motor. The three movable clamping blocks are installed on three jaws of the three-jaw supporting seat in a sliding mode through the linear guide rail assembly. The three lead screw assemblies are arranged below the three sliding movable clamping blocks respectively and control the movable clamping blocks to move, the pneumatic motor is installed below the three-jaw supporting seat, an output shaft of the pneumatic motor extends to the center of the three lead screw assemblies, the bevel gears are installed at the ends of the three lead screw assemblies and the output shaft of the pneumatic motor respectively, and the bevel gears are connected with the three lead screw assemblies. And the bevel gear mounted at the end part of the screw rod component is meshed with the bevel gear on the output shaft of the pneumatic motor. The pneumatic motor has the characteristics of wide application range, reliability and high efficiency.

Description

Technical Field

[0001] The utility model relates to a three-jaw tool, in particular to a three-jaw self-centering pneumatic tool. Background Art

[0002] Many workpieces in tank production are usually round parts with flanges, and these workpieces usually have large differences in size and specifications. In the actual production process, these round parts are usually clamped and positioned with flanges. How to use a set of tooling to achieve clamping and positioning of round parts of different sizes and specifications is often a technical problem faced in industrial production. Therefore, how to solve this problem is of great significance in industrial production. To solve this problem, a tooling with a wide range of clamping applications, reliable clamping and high efficiency is needed. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides a three-jaw self-centering pneumatic tooling, which has the characteristics of wide application range, reliability and high efficiency, and solves the above-mentioned problems.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a three-jaw self-centering pneumatic tooling, comprising: a three-jaw support seat, a movable clamping block, a linear guide assembly, a screw assembly, a bevel gear, and an air motor. The three movable clamping blocks are slidably installed on the three claws of the three-jaw support seat through the linear guide assembly. The three groups of screw assemblies are respectively arranged under the three sliding movable clamping blocks to control the movement of the movable clamping blocks. The air motor is installed under the three-jaw support seat, and its output shaft extends to the center of the three screw assemblies. Multiple bevel gears are respectively installed on the ends of the three screw assemblies and the output shaft of the air motor, so that the bevel gears installed at the ends of the screw assembly are meshed with the bevel gears on the output shaft of the air motor.

[0005] Furthermore, the three-claw support seat includes: a cylindrical support and a supporting claw seat. The three claw seats are evenly distributed around the cylindrical support, and the operating surface on the cylindrical support and the operating surface on the supporting claw seat are set on the same plane. The linear guide rail assembly and the screw rod assembly are installed on the operating surfaces of the cylindrical support and the supporting claw seat.

[0006] Furthermore, the movable clamping block includes: a slide, a support plate, and a clamping block. The slide is connected to the linear guide rail assembly and the screw assembly. The support plate is installed on the slide, and the clamping block is installed on the support plate. The support plate is used to place the workpiece, and the clamping block is used to clamp the workpiece.

[0007] Furthermore, the slide is provided with a plurality of mounting holes for adjusting the mounting position of the support plate.

[0008] Furthermore, the support plate is provided with a plurality of mounting holes for adjusting the mounting position of the clamping block.

[0009] Furthermore, it also includes: a beam switch, in which the receiving end and the transmitting end are located on the same straight line, and are respectively installed on one of the screw rod assemblies and the cylindrical support opposite to the screw rod assembly, for detecting the presence or absence of a workpiece.

[0010] Furthermore, it also includes: an encoder, which is installed on one of the screw rod assemblies and is used to detect the moving distance of the movable clamping block.

[0011] Furthermore, it also includes: a screw rod protective cover, which is a flexible or telescopic protective cover, and the screw rod protective cover is arranged between the slide and the end of the screw rod assembly to protect the screw rod assembly.

[0012] Furthermore, it also includes: a gear protection cover, which is installed above the multiple bevel gears.

[0013] The beneficial effects of the utility model are:

[0014] (1) The three-jaw self-centering pneumatic tooling uses a pneumatic motor as the power source, which drives the trapezoidal screw in the screw assembly through the bevel gear, thereby converting the rotational motion into horizontal linear movement;

[0015] (2) The slide is installed on the slider of the guide rail assembly and is driven by a trapezoidal screw to achieve horizontal movement; (3) The support plate is installed on the slide to support the workpiece, and the clamping block is installed on the slide to clamp the workpiece;

[0016] (4) The screw rod uses a trapezoidal screw rod. When the clamping block is clamping the workpiece, the trapezoidal screw rod can be self-locked to ensure safe use;

[0017] (5) By using the encoder, it can stop at any position, thus achieving stepless adjustment, high precision, safety and reliability;

[0018] (6) By setting a beam switch to detect the presence of a workpiece, automatic clamping can be achieved;

[0019] (7) The utility model has the characteristics of wide application range, reliability and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the top structure of the utility model;

[0022] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the middle BB;

[0023] Figure 4This is a schematic diagram of the bottom-up structure of the present invention;

[0024] Figure 5 It is a three-dimensional structural diagram of the three-claw support base;

[0025] In the figure: 1. Three-claw support seat; 101. Cylindrical support; 102. Support claw seat; 2. Slide; 3. Support plate; 4. Clamp; 5. Pneumatic motor; 6. Screw assembly; 7. Screw protection cover; 8. Guide rail assembly; 9. Encoder; 10. Bevel gear; 11. Gear protection cover. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0028] like Figure 1-5 As shown, a three-jaw self-centering pneumatic tooling comprises: a three-jaw support seat 1, a movable clamping block, a linear guide assembly 8, a screw assembly 6, a bevel gear 10, and an air motor 5. The three movable clamping blocks are slidably mounted on the three jaws of the three-jaw support seat 1 through the linear guide assembly 8. The three groups of screw assemblies 6 are respectively arranged under the three sliding movable clamping blocks to control the movement of the movable clamping blocks. The air motor 5 is installed under the three-jaw support seat 1, and its output shaft extends to the center of the three screw assemblies 6. A plurality of bevel gears 10 are respectively mounted on the ends of the three screw assemblies 6 and the output shaft of the air motor 5, so that the bevel gear 10 mounted on the end of the screw assembly 6 is meshed with the bevel gear 10 on the output shaft of the air motor 5.

[0029] Each movable clamping block is mounted on the three-claw support seat 1 through two parallel guide rail assemblies 8 , and the screw assembly 6 is arranged between the two parallel guide rail assemblies 8 .

[0030] The guide rail assembly 8 includes: a guide rail and a slider arranged on the guide rail. The guide rail is installed on the three-claw support base 1 through bolts, and the slider is connected to the movable clamping block.

[0031] The screw assembly 6 includes: a bearing seat, a trapezoidal screw, and a screw nut. The two bearing seats are installed on both sides of the movable range of the movable clamping block. The trapezoidal screw is inserted into the two bearing seats. The screw nut is installed on the trapezoidal screw and connected to the movable clamping block by bolts.

[0032] like Figure 5 As shown, the three-claw support seat 1 includes: a cylindrical support 101, a supporting claw seat 102, and the three manufactured claw seats are evenly distributed around the cylindrical support 101, and the operating surface on the cylindrical support 101 and the operating surface on the supporting claw seat 102 are set on the same plane, and the linear guide rail assembly 8 and the screw assembly 6 are installed on the operating surfaces of the cylindrical support 101 and the supporting claw seat 102.

[0033] like Figure 1-2 As shown, the movable clamping block includes: a slide 2, a support plate 3, and a clamping block 4. The slide 2 is connected to the linear guide rail assembly 8 and the screw assembly 6. The support plate 3 is installed on the slide 2, and the clamping block 4 is installed on the support plate 3. The support plate 3 is used to place the workpiece, and the clamping block 4 is used to clamp the workpiece.

[0034] The slide 2 is provided with a plurality of mounting holes for adjusting the mounting position of the support plate 3 .

[0035] The support plate 3 is provided with a plurality of mounting holes for adjusting the mounting position of the clamping block 4 .

[0036] like Figure 1-2 As shown, the three-jaw self-centering pneumatic tooling also includes: a shooting switch, the receiving end and the transmitting end of the shooting switch are located on the same straight line, respectively installed on one of the screw rod assemblies 6 and the cylindrical support 101 opposite to the screw rod assembly 6, for detecting the presence or absence of a workpiece. After being connected to the control system, when a workpiece is detected, the pneumatic motor 5 can be automatically controlled to work to achieve automatic clamping.

[0037] In order to facilitate the installation of the receiving end and the transmitting end of the through-beam switch, a mounting plate can be added to ensure that the through-beam switch can effectively detect the workpiece without affecting the work.

[0038] like Figure 1 、 2 As shown in , 4, the three-jaw self-centering pneumatic tooling also includes: an encoder 9, which is installed on one of the screw assemblies 6 and is used to detect the moving distance of the mobile clamping block, that is, the encoder 9 is installed at the tail end of the trapezoidal screw in one of the screw assemblies 6. After the encoder 9 is connected to the control system, it can provide real-time feedback on the moving distance of the mobile clamping block and can achieve stopping at any position.

[0039] The encoder 9 is an absolute value encoder 9 .

[0040] The three-jaw self-centering pneumatic tooling can also be equipped with an independent control system, such as a PLC control system. The shooting switch and the encoder 9 are connected to the PLC control system. The PLC control system controls the operation of the pneumatic motor 5 by controlling the solenoid valve connected to the air source. The pneumatic motor 5 is connected to the air source through the solenoid valve and the pipeline.

[0041] like Figure 1-2 As shown, the three-jaw self-centering pneumatic tooling also includes: a screw protection cover 7, which is a flexible or telescopic protection cover. The screw protection cover 7 is arranged between the slide 2 and the end of the screw assembly 6, and is used to protect the screw assembly 6, that is, the two ends of the screw protection cover 7 are respectively connected to the slide 2 and the bearing seat, and the movement of the slide 2 drives the screw protection cover 7 to deform, thereby realizing protection of the screw.

[0042] like Figure 1-2 As shown, the three-jaw self-centering pneumatic tooling also includes: a gear protection cover 11, which is installed above the multiple bevel gears 10 to protect the safety of the operator, prevent foreign objects from falling, and increase the service life of the multiple bevel gears 10.

[0043] When in use, the three-jaw self-centering pneumatic tooling is installed on the required equipment, such as the workbench of a machine tool, the workbench of a machining center, or the workbench of an automatic welding device. This embodiment takes the workbench of an automatic welding device as an example. After connecting the pneumatic motor 5, the encoder 9, and the beam switch to the control system of the automatic welding device, the operation is carried out as follows:

[0044] Step 1: The handling robot transports the workpiece to the pneumatic tooling loading position through the gripper;

[0045] Step 2: The beam detection switch detects whether there is a workpiece at the loading position. If there is a workpiece, it will be clamped and automatically clamped into place according to the workpiece's dimensions.

[0046] Step 3: After the workpiece clamping action is completed, the automatic welding station starts welding the workpiece;

[0047] Step 4: After welding is completed at the welding station, the clamp 4 automatically opens to the HOME position and waits for the handling robot to grab the workpiece and move it to the next station, such as the manual repair welding station or the blanking plate chain;

[0048] Step 5. Repeat steps 1 to 4.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-jaw self-centering pneumatic tooling, characterized in that: include: A three-claw support seat, a movable clamping block, a linear guide assembly, a screw assembly, a bevel gear, and an air motor. The three movable clamping blocks are slidably installed on the three claws of the three-claw support seat through the linear guide assembly. The three groups of screw assemblies are respectively arranged under the three sliding movable clamping blocks to control the movement of the movable clamping block. The air motor is installed under the three-claw support seat, and its output shaft extends to the center of the three screw assemblies. Multiple bevel gears are respectively installed on the ends of the three screw assemblies and the output shaft of the air motor, so that the bevel gears installed at the ends of the screw assembly are meshed with the bevel gears on the output shaft of the air motor.

2. A three-jaw self-centering pneumatic tooling according to claim 1, characterized in that: The three-claw support seat includes: a cylindrical support and a supporting claw seat. The three claw seats are evenly distributed around the cylindrical support, and the operating surface on the cylindrical support and the operating surface on the supporting claw seat are set on the same plane. The linear guide rail assembly and the screw rod assembly are installed on the operating surfaces of the cylindrical support and the supporting claw seat.

3. The three-jaw self-centering pneumatic tooling according to claim 1, characterized in that: The movable clamping block includes: a slide, a supporting plate, and a clamping block. The slide is connected to the linear guide rail assembly and the screw assembly. The supporting plate is installed on the slide, and the clamping block is installed on the supporting plate. The supporting plate is used to place the workpiece, and the clamping block is used to clamp the workpiece.

4. A three-jaw self-centering pneumatic tooling according to claim 3, characterized in that: The slide is provided with a plurality of mounting holes for adjusting the mounting position of the support plate.

5. The three-jaw self-centering pneumatic tooling according to claim 3, characterized in that: The support plate is provided with a plurality of mounting holes for adjusting the mounting position of the clamping block.

6. The three-jaw self-centering pneumatic tooling according to claim 2, characterized in that: It also includes: a beam switch, in which the receiving end and the transmitting end are located on the same straight line and are respectively installed on one of the screw rod assemblies and the cylindrical support opposite to the screw rod assembly, for detecting the presence of a workpiece.

7. The three-jaw self-centering pneumatic tooling according to claim 2, characterized in that: Also includes: An encoder is mounted on one of the lead screw assemblies and is used to detect the moving distance of the moving clamping block.

8. The three-jaw self-centering pneumatic tooling according to claim 3, characterized in that: Also includes: The screw rod protective cover is a flexible or telescopic protective cover, which is arranged between the slide and the end of the screw rod assembly to protect the screw rod assembly.

9. The three-jaw self-centering pneumatic tooling according to claim 2, characterized in that: Also includes: The gear protection cover is mounted above the plurality of bevel gears.

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