Electric chuck for positioning disc workpieces

Abstract

The utility model relates to an electric chuck for positioning disc type workpieces, and belongs to the technical field of clamping of disc type workpieces. The electric chuck comprises a chuck body, a fluted disc, a plurality of clamping jaws and a driving mechanism, the clamping jaws are evenly distributed on the chuck body in the circumferential direction, and the electric chuck further comprises a zero return detection switch used for conducting zero return detection on the clamping jaws. The driving mechanism comprises a transmission bevel gear and a servo motor, the transmission bevel gear is rotationally arranged in the disc body, disc teeth meshed with bevel teeth of the transmission bevel gear are arranged on the lower surface of the fluted disc, a sliding way for radial feeding of the clamping jaws is arranged on the chuck, plane threads are arranged on the upper surface of the fluted disc, and the servo motor is arranged on the lower surface of the fluted disc. The clamping jaw is provided with a tooth groove matched with the plane thread. The automatic clamping device is simple in structure and convenient to operate, automatic clamping is driven by the servo motor, the clamping efficiency and clamping reliability of the disc type workpieces are improved, automatic model changing can be achieved, and the automatic clamping device is suitable for clamping and positioning of small-batch and multi-variety disc type workpieces.

Description

Technical Field

[0001] This utility model relates to an electric chuck for positioning disc-type workpieces, belonging to the field of disc-type workpiece clamping technology. Background Technology

[0002] Currently, when drilling disc-shaped workpieces such as brake discs on drilling centers, a drilling chuck is needed to hold and position the workpiece. There are many types of existing chucks, such as manual three-jaw chucks, which require manual adjustment of the jaws to hold and release the workpiece. This results in high labor intensity for workers, low clamping and positioning efficiency, and affects the processing efficiency of disc-shaped workpieces. Another method is hydraulic clamping. Hydraulic clamping devices include jaws, hydraulic cylinders, and an oil circuit system. Hydraulic oil enters the hydraulic cylinder, causing the piston to move forward. The piston drives the jaws to move outward, opening the jaws to... The workpiece is placed in the jaws, and hydraulic oil enters the hydraulic cylinder, causing the piston to move backward. The piston drives the jaws to move inward, clamping the workpiece. Hydraulic clamping uses hydraulic pressure to transmit the clamping force of the jaws to the workpiece, thereby achieving the purpose of clamping the workpiece. Although hydraulic chucks can clamp workpieces, the hydraulic clamping structure is complex, with many oil circuits and other configurations, resulting in high costs. Furthermore, the clamping range of hydraulic chucks is limited by the stroke of the hydraulic cylinder. When changing models, it is necessary to adjust the position of the jaws according to the clamping diameter of the workpiece, making it unsuitable for clamping small batches of disc-shaped workpieces with multiple varieties. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing an electric chuck for positioning disc-type workpieces.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An electric chuck for positioning disc-type workpieces includes a disc body, a toothed disc rotatably disposed in the disc body, a plurality of radially feeding jaws disposed on the disc body, and a driving mechanism for driving the jaws to radially feed on the disc body. The plurality of jaws are evenly distributed on the disc body in the circumferential direction. It also includes a zero-return detection switch for zeroing detection of the jaws.

[0005] The drive mechanism includes a transmission bevel gear and a servo motor for rotating the transmission bevel gear. The transmission bevel gear is rotatably mounted in the disk body. The lower surface of the disk is provided with disk teeth that mesh with the bevel teeth of the transmission bevel gear. The chuck is provided with a slide for radial feeding of the chuck jaws. The upper surface of the disk is provided with a planar thread. The chuck jaws are provided with tooth grooves that are adapted to the planar thread.

[0006] The beneficial effects of this utility model are as follows: Based on the clamping diameter of the disc-shaped workpiece to be processed, the servo motor operates, the transmission bevel gear rotates, the gear disc rotates, and the jaws can move radially outward along the slide of the disc body, placing the disc-shaped workpiece into the jaws. The servo motor then rotates in the opposite direction, achieving automatic clamping of the disc-shaped workpiece. The servo motor drives the jaw movement, and clamping is achieved through the servo torque of the servo motor, ensuring stable and reliable clamping. Using a servo motor to drive the jaws to clamp the workpiece enables long-stroke clamping. The zero-return detection switch can detect when the jaws return to zero. Disc-shaped workpieces have diverse specifications, especially for the clamping and positioning of small batches and multiple varieties of disc-shaped workpieces. The clamping diameter required by the chuck will vary. Under the action of the drive mechanism, the jaws can automatically clamp. When changing the shape of a disc-shaped workpiece, the clamping diameter of the workpiece to be changed is provided. The servo motor will first execute the jaw zeroing, and then run to the clamping diameter position of the disc-shaped workpiece to be clamped for automatic clamping, achieving unmanned automatic shape changing and ensuring that the jaws can accurately clamp the workpiece after shape change. This invention features a simple structure and convenient operation. The servo motor drives automatic clamping, which improves the clamping efficiency and reliability of disc-shaped workpieces. It can achieve automatic form changing and is suitable for clamping and positioning disc-shaped workpieces in small batches and of various varieties.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the disk body is provided with a disk hole, and the zero-return detection switch is located in the disk hole.

[0009] The beneficial effect of adopting the above-mentioned further solution is that the zero-return detection switch can be installed in the disc hole through the switch bracket, so that the zero-return detection switch can accurately detect whether the chuck has performed a zero-return operation, thus preparing for accurate clamping and positioning of disc-type workpieces and workpieces after shape change.

[0010] Furthermore, it also includes multiple detection sensors for preventing disc-shaped workpieces from being misaligned, and the detection sensors are correspondingly disposed on the jaws.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the detection sensor can be a contact sensor. A detection sensor is installed on the chuck jaws. When a disc-shaped workpiece is placed on the chuck jaws, the detection sensor can detect the distance between itself and the lower surface of the workpiece, determining whether the disc-shaped workpiece is not leveled or properly clamped, thus avoiding situations such as hole misalignment and collisions during subsequent processing of the disc-shaped workpiece, such as drilling.

[0012] Furthermore, the claw is provided with a sensor mounting hole for mounting the detection sensor.

[0013] The advantage of adopting the above-mentioned further solution is that the detection sensor can be installed in the sensor mounting hole, making the installation of the detection sensor convenient.

[0014] Furthermore, it also includes a lubrication mechanism for automatically lubricating the chuck.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the existing chuck lubrication is achieved by manually providing lubricating oil to the chuck periodically. Manual lubrication increases the maintenance time of the chuck, affects the working efficiency of the chuck, and if lubrication is not timely, it will also affect the service life of the chuck.

[0016] Furthermore, the lubrication mechanism includes a lubrication pipeline, and the disc body is provided with a lubrication hole. The lubrication pipeline passes through the disc hole of the disc body, with one end connected to the lubrication hole and the other end connected to lubricating oil.

[0017] The beneficial effect of adopting the above-mentioned further solution is that automatic lubrication can be achieved by directly connecting the lubrication line to the lubrication hole of the chuck. The chuck is used in a drilling center machine tool, and the other end of the lubrication line can be directly connected to the lubrication line of the machine tool to automatically supply lubricating oil to the chuck. This eliminates the need for regular manual maintenance and extends the service life of the chuck.

[0018] Furthermore, it also includes a dustproof mechanism for protecting the chuck.

[0019] The beneficial effect of adopting the above-mentioned further solution is that when the electric chuck is used, such as in a drilling center, dust and other particles may fall into the chuck due to the drilling environment, affecting the use of the chuck. Therefore, by adding a dustproof mechanism, the chuck can be protected from dust and other particles, preventing them from entering the chuck and affecting its service life, thus extending the chuck's maintenance cycle and service life.

[0020] Furthermore, the dustproof mechanism includes a dustproof cover, the claw includes a bearing panel disposed inside the claw body, and the cover of the dustproof cover is supported on the bearing panel.

[0021] The beneficial effect of adopting the above-mentioned further solution is that the dustproof mechanism can be a dust cover. A dust cover can be installed in the middle of the chuck according to the maximum and minimum clamping stroke. The bearing panel of the chuck jaws can support the dust cover. The dust cover can protect the chuck and prevent dust, iron filings and other particles from entering the chuck, which would affect the service life of the chuck and increase the maintenance cost of the chuck.

[0022] Furthermore, the bottom of the disc body is also provided with a base plate, and the base plate is provided with plate holes that are adapted to the disc holes of the disc body.

[0023] The advantage of adopting the above-mentioned further solution is that the disc body can be installed on the base plate, and when the chuck is installed in the drilling center, the electric chuck can be positioned and installed through the connection with the base plate.

[0024] Furthermore, the servo motor is mounted on the disk body or the base plate via a mounting bracket.

[0025] The advantage of adopting the above-mentioned further solution is that the servo motor can be mounted on the disk body via a mounting bracket, or it can be mounted on the base plate, thus achieving the positioning and installation of the servo motor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a structural schematic diagram of the workpiece clamping state of this utility model;

[0028] In the diagram, 1. Disc body; 2. Gear disc; 3. Clamping jaw; 4. Servo motor; 5. Transmission bevel gear; 6. Coupling; 7. Zero return detection switch; 8. Switch bracket; 9. Detection sensor; 10. Gear groove; 11. Lubrication pipeline; 12. Lubrication hole; 13. Dust cover; 14. Bearing panel; 15. Mounting base; 16. Base plate; 17. Workpiece. Detailed Implementation

[0029] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0030] like Figure 1 and Figure 2 As shown, an electric chuck for positioning disc-type workpieces includes a disc body 1, a toothed disc 2 rotatably disposed in the disc body 1, a plurality of radially feeding jaws 3 disposed on the disc body 1, and a drive mechanism for driving the jaws 3 to radially feed on the disc body 1. The plurality of jaws 3 are evenly distributed on the disc body 1 in the circumferential direction. It also includes a zero-return detection switch 7 for zero-return detection of the jaws 3.

[0031] The drive mechanism includes a transmission bevel gear 5 and a servo motor 4 for rotating the transmission bevel gear 5. The transmission bevel gear 5 is rotatably disposed inside the disk body 1. The output shaft of the servo motor 4 is connected to the transmission bevel gear 5. The lower surface of the gear disk 2 is provided with disk teeth that mesh with the bevel teeth of the transmission bevel gear 5. The chuck is provided with a slide for radial feeding of the chuck jaw 3. The upper surface of the gear disk 2 is provided with a planar thread. The chuck jaw 3 is provided with a tooth groove 10 that matches the planar thread.

[0032] The disc body 1 has a disc hole, and the zero-return detection switch 7 is mounted in the disc hole via a switch bracket 8. Disc-type workpieces 17 come in various specifications, especially for the clamping and positioning of small batches and multiple varieties of disc-type workpieces 17. The clamping diameter required by the chuck will vary. Under the action of the drive mechanism, the jaws 3 can automatically clamp the workpiece. When changing the type of disc-type workpiece 17, the control system is provided with the clamping diameter of the changed workpiece 17. The servo motor 4 will first execute the zeroing of the jaws 3. Figure 1 The demonstration shows the chuck 3 returning to its zero-position state, and then automatically clamping the disc-shaped workpiece 17 to be changed and held, achieving unmanned automatic form changing and ensuring that the chuck 3 can accurately clamp the workpiece 17 after the form change. The zero-return detection switch 7 can be installed in the disc hole through the switch bracket 8 so that the zero-return detection switch 7 can accurately detect whether the chuck 3 has performed a zero-return operation, preparing for accurate clamping and positioning of the disc-shaped workpiece 17 and the workpiece 17 after the form change.

[0033] It also includes multiple detection sensors 9 for preventing the disc-shaped workpiece 17 from being clamped off-center, and the detection sensors 9 are correspondingly disposed on the jaws 3. The detection sensors 9 can be contact sensors. With the detection sensors 9 installed on the jaws 3, the disc-shaped workpiece 17 is placed on the jaws 3, and the detection sensors 9 can detect the distance between themselves and the lower surface of the workpiece 17 to determine whether the disc-shaped workpiece 17 is not placed flat and is clamped off-center, thus avoiding hole deviation and collision during subsequent processing of the disc-shaped workpiece 17, such as drilling.

[0034] The gripper 3 is provided with a sensor mounting hole for installing the detection sensor 9. The detection sensor 9 can be installed in the sensor mounting hole, making installation convenient.

[0035] It also includes a lubrication mechanism for automatic lubrication of the chuck. Currently, chuck lubrication relies on manual, periodic application of lubricating oil. Manual lubrication increases chuck maintenance time, affects chuck efficiency, and can even shorten chuck lifespan if lubrication is not timely.

[0036] The lubrication mechanism includes a lubrication pipe 11, and a lubrication hole 12 is provided on the disc body 1. One end of the lubrication pipe 11 is connected to the lubrication hole 12 through the disc hole of the disc body 1, and the other end is connected to lubricating oil. Automatic lubrication can be achieved by directly connecting the lubrication pipe 11 to the lubrication hole 12 of the chuck. The chuck is used in drilling centers. The other end of the lubrication pipe 11 can be directly connected to the lubrication pipe of the machine tool to automatically supply lubricating oil to the chuck. This eliminates the need for regular manual maintenance and extends the service life of the chuck.

[0037] It also includes a dustproof mechanism to protect the chuck. When using an electric chuck, such as in a drilling center, the drilling environment can cause dust and other contaminants to fall into the chuck, affecting its operation. Therefore, a dustproof mechanism is added to protect the chuck, preventing dust and other contaminants from entering and affecting its service life, thus extending the chuck's maintenance cycle and overall lifespan.

[0038] The dustproof mechanism includes a dust cover 13, and the chuck 3 includes a bearing panel 14 disposed inside the chuck body. The dust cover 13 is supported on the bearing panel 14. The dustproof mechanism can be a dust cover 13, which can be installed at the middle position of the chuck according to the maximum and minimum clamping stroke. The bearing panel 14 of the chuck 3 can support the dust cover 13. The dust cover 13 can protect the chuck and prevent dust, iron filings, etc. from entering the chuck, affecting the service life of the chuck and increasing the maintenance cost of the chuck.

[0039] The bottom of the disc body 1 is also provided with a base plate 16, and the base plate 16 has plate holes that are adapted to the disc holes of the disc body 1. The disc body 1 can be installed on the base plate 16. When the chuck is installed in the drilling center, the electric chuck can be positioned and installed by connecting with the base plate 16.

[0040] The servo motor 4 is mounted on the disk body 1 or the base plate 16 via the mounting base 15. The servo motor 4 can be mounted on the disk body 1 via the mounting base 15, or it can be mounted on the base plate 16, thus achieving the positioning and installation of the servo motor 4.

[0041] The output shaft of the servo motor 4 is connected to the transmission bevel gear 5 via a coupling 6. The coupling 6 enables the connection between the transmission bevel gear 5 and the servo motor 4.

[0042] During operation, the control system, such as the PLC control system, receives the signal indicating the clamping diameter of the disc-shaped workpiece 17 to be clamped. It reserves a certain space based on the clamping diameter of the workpiece 17, such as the release position of the chuck 3 being ±10mm of the clamping diameter of the workpiece 17. The system then sends the movement data to the servo motor 4. The servo motor 4 activates, causing the transmission bevel gear 5 to rotate and transmit power to the gear disc 2. As the gear disc 2 rotates, the chuck 3 moves radially outward along the slide rail on the disc body 1 because the tooth groove 10 of the chuck 3 engages with the planar thread on the gear disc 2. The chuck 3 then releases, waiting to clamp the workpiece 17. The workpiece 17 is placed between the chuck 3, and the servo motor... The servo motor 4 reverses its movement, causing the chuck 3 to move radially inward along the slide rail, clamping the workpiece 17. Once the workpiece 17 is clamped in place, drilling can be performed. After machining, the servo motor 4 activates, and the chuck 3 releases, allowing the machined workpiece 17 to be removed and ready for the next workpiece 17 to be positioned and clamped. For disc-shaped workpieces 17 undergoing a changeover, the servo motor 4 first performs a zero-return operation. That is, the servo motor 4 activates, controlling the chuck 3 to reset to the zero position. The zero-return detection switch 7 detects the chuck 3 and determines that it has returned to zero. The servo motor 4 then runs to the clamping position of the disc-shaped workpiece 17 after the changeover, enabling unmanned automatic changeover without human intervention. Furthermore, when placing the disc-shaped workpiece 17, the detection sensor 9 on the chuck 3 can also detect the contact distance on the lower surface of the workpiece 17 to determine whether the workpiece 17 is placed flat, ensuring that the product clamped by the chuck 3 is aligned correctly. This prevents subsequent drilling deviation and collisions of the workpiece 17, ensuring the drilling quality of the clamped workpiece 17.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric chuck for positioning disc-type workpieces, characterized in that, It includes a disc body (1), a toothed disc (2) rotatably disposed in the disc body (1), a plurality of pawls (3) radially fed on the disc body (1), and a drive mechanism for driving the pawls (3) radially fed on the disc body (1). The plurality of pawls (3) are evenly distributed on the disc body (1) in the circumferential direction. It also includes a zero-return detection switch (7) for zeroing detection of the pawls (3). The drive mechanism includes a transmission bevel gear (5) and a servo motor (4) for rotating the transmission bevel gear (5). The transmission bevel gear (5) is rotatably disposed in the disc body (1). The lower surface of the gear disc (2) is provided with disc teeth that mesh with the bevel teeth of the transmission bevel gear (5). The chuck is provided with a slide for radial feeding of the chuck jaw (3). The upper surface of the gear disc (2) is provided with a planar thread. The chuck jaw (3) is provided with a tooth groove (10) that matches the planar thread.

2. The electric chuck for positioning disc-type workpieces according to claim 1, characterized in that, The disk body (1) is provided with a disk hole, and the zero return detection switch (7) is located in the disk hole.

3. The electric chuck for positioning disc-type workpieces according to claim 1, characterized in that, It also includes multiple detection sensors (9) for preventing the disc-shaped workpiece (17) from being misaligned, and the detection sensors (9) are correspondingly disposed on the jaws (3).

4. The electric chuck for positioning disc-type workpieces according to claim 3, characterized in that, The claw (3) is provided with a sensor mounting hole for mounting the detection sensor (9).

5. The electric chuck for positioning disc-type workpieces according to any one of claims 1-4, characterized in that, It also includes a lubrication mechanism for automatically lubricating the chuck.

6. The electric chuck for positioning disc-type workpieces according to claim 5, characterized in that, The lubrication mechanism includes a lubrication pipeline (11), and the disc body (1) is provided with a lubrication hole (12). The lubrication pipeline (11) passes through the disc hole of the disc body (1), with one end connected to the lubrication hole (12) and the other end connected to lubricating oil.

7. The electric chuck for positioning disc-type workpieces according to any one of claims 1-4, characterized in that, It also includes a dustproof mechanism for protecting the chuck.

8. The electric chuck for positioning disc-type workpieces according to claim 7, characterized in that, The dustproof mechanism includes a dust cover (13), and the claw (3) includes a bearing panel (14) disposed inside the claw body. The cover of the dust cover (13) is supported on the bearing panel (14).

9. The electric chuck for positioning disc-type workpieces according to any one of claims 1-4, characterized in that, The bottom of the disc body (1) is also provided with a base plate (16), and the base plate (16) is provided with plate holes that are adapted to the disc holes of the disc body (1).

10. The electric chuck for positioning disc-type workpieces according to claim 9, characterized in that, The servo motor (4) is mounted on the disk body (1) or the base plate (16) via a mounting bracket (15).

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