Clamp structure of sanding machine

Abstract

The utility model relates to a clamp structure of a sander, which comprises a clamp seat component, a clamping station is arranged on the top surface of the clamp seat component, and a plurality of bearing clamp components which slide back and forth along the radial direction are arranged on the top surface of the clamp seat component along the periphery of the clamping station. The clamp base assembly is further connected with a clamp lead screw plate and a lifting driving device used for controlling the clamp lead screw plate to lift up and down in the axis direction, a clamp clamping rod is arranged between the clamp lead screw plate and the bearing clamp assembly, and the lower portion of the clamp clamping rod is rotationally hinged to the clamp lead screw plate. The upper portion of the clamp clamping rod is rotationally hinged to the bearing clamp assembly, and the clamp lead screw plate which ascends and descends drives the bearing clamp assembly to slide front and back through the clamp clamping rod so that a workpiece can be loosened or clamped. The sanding machine adopts the clamp structure, and the plurality of bearing clamp assemblies are driven to horizontally slide back and forth through the up-down lifting action of the clamp screw rod plate, so that the clamp structure can be fully compatible with workpieces with various diameter specifications.

Description

Technical Field

[0001] The utility model relates to the field of sanding machines, in particular to a fixture structure of a sanding machine. Background Technique

[0002] A manipulator fixture is used to fix a workpiece during the mechanical manufacturing process, so that the workpiece is fixed in the correct position, and the fixture is a device for accepting construction or detection. Before the parts are processed by a sanding machine, the workpiece must be automatically clamped, and the clamped workpiece needs to have a strict positional relationship with the work station to ensure the processing quality of the workpiece. After the workpiece is processed, the fixture can automatically unload the workpiece.

[0003] The existing sanding machine fixture technology has the following problems: The traditional sanding machine fixture has a complex structure and high assembly difficulty. It mainly realizes grasping or releasing through a pneumatic method, and the fixing effect is poor. When the diameter of the workpiece to be processed is large, it is extremely easy to shake and slide during the processing, so that the processing position changes and the processing quality is reduced. Therefore, a new fixture structure needs to be provided for an automated sanding machine. Summary of the Invention

[0004] The purpose of the utility model is to provide a fixture structure of a sanding machine with a simple and reasonable structure, convenient installation and stable structure.

[0005] A fixture structure of a sanding machine includes a fixture seat assembly. A clamping station is arranged on the top surface of the fixture seat assembly. A plurality of bearing clamp assemblies that slide back and forth in the radial direction are arranged along the outer periphery of the clamping station on the top surface of the fixture seat assembly. A fixture lead screw plate is also connected to the fixture seat assembly, and a lifting drive device for controlling the up and down lifting of the fixture lead screw plate along the axis direction. A fixture clamp rod is arranged between the fixture lead screw plate and the bearing clamp assembly. The lower part of the fixture clamp rod is rotatably hinged to the fixture lead screw plate, and the upper part of the fixture clamp rod is rotatably hinged to the bearing clamp assembly. The up and down lifting fixture lead screw plate drives the bearing clamp assembly to slide back and forth through the fixture clamp rod to realize the loosening or clamping of the workpiece.

[0006] The purpose of the utility model can also be solved by adopting the following technical measures:

[0007] As a more specific solution, the bearing clamp assembly includes a slide rail pair, a fixture sliding lock block and a positioning bearing clamp. The fixture sliding lock block is slidably connected to the top surface of the fixture seat assembly through the slide rail pair. The positioning bearing clamp is rotatably connected above the fixture sliding lock block through a rotating shaft, and the positioning bearing clamp is provided with a V-shaped clamping opening facing the clamping station.

[0008] As a further solution, a pair of locking block hinge arms extend vertically downward from the rear end of the fixture sliding locking block, and the bottom ends of the locking block hinge arms are rotatably hinged to the upper part of the fixture clamping rod; several pairs of hinge seats extend outward corresponding to the number of fixture screw plates on the side of the fixture screw plate, and the hinge seats are rotatably hinged to the lower part of the fixture clamping rod.

[0009] As a further solution, the lifting drive device includes a ball screw and a stepping motor or a servo motor. The ball screw is rotatably connected to the upper part of the fixture seat assembly along the central axis direction. The stepping motor or the servo motor is fixed to the lower part of the fixture seat assembly, and its output shaft is in transmission connection with the ball screw. The fixture screw plate is fixed on the nut sleeve of the ball screw.

[0010] As a further solution, the fixture seat assembly includes a jaw cylinder lock plate and a rotary bearing bushing. The jaw cylinder lock plate and the rotary bearing bushing are connected by several optical axes. The fixture screw plate is provided with side holes that form a linear sliding fit with the optical axes.

[0011] As a further solution, a fixture positioning shaft is connected to the center of the top surface of the fixture seat assembly. Several bearing clamp assemblies are evenly arranged along the outer circumference of the fixture positioning shaft. The top end of the fixture positioning shaft is connected with a fixture positioning support plate, and the fixture positioning support plate forms a clamping station.

[0012] As a further solution, a screw support is arranged on the top surface of the jaw cylinder lock plate, and the top end of the ball screw is rotatably connected to the screw support; a screw support seat is arranged on the top of the rotary bearing bushing, and the bottom end of the ball screw is rotatably connected to the screw support seat and extends into the rotary bearing bushing.

[0013] As a further solution, a servo board is further connected to the bottom of the rotary bearing bushing. The stepping motor or the servo motor is fixedly connected to the servo board, and the output shaft of the stepping motor or the servo motor extends into the rotary bearing bushing. A coupling is arranged in the rotary bearing bushing, and the lower end of the ball screw is in transmission connection with the output shaft of the stepping motor or the servo motor through the coupling.

[0014] As a further solution, a workbench is further included. A rotary drive device is installed on the workbench. The rotary drive device is in transmission connection with the fixture seat assembly, and the rotary drive device drives the fixture seat assembly to rotate axially on the workbench.

[0015] As a further solution, the rotary drive device includes a rotary closed-loop motor. A driving wheel is fixed on the output shaft of the rotary closed-loop motor. A driven wheel is fixed on the fixture seat assembly. The rotary closed-loop motor is in transmission connection with the fixture seat assembly through the cooperation of the driving wheel and the driven wheel.

[0016] The beneficial effects of the present utility model are as follows:

[0017] A fixture structure of a sander according to the present utility model. When this sander adopts this fixture structure, the fixture structure can adapt to the assembly line work of the sander. Through the up and down lifting action of the fixture screw plate, several bearing clip assemblies are driven to slide horizontally back and forth, enabling the fixture structure to be fully compatible with workpieces of various diameter specifications. The workpieces are firmly and stably clamped, which can improve the fixing effect, ensure the machining accuracy of the workpieces, quickly complete the loosening or clamping action, and improve the machining efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment in the present utility model.

[0019] Figure 2 It is a schematic cross-sectional structure diagram when the fixture structure of the present utility model loosens the workpiece.

[0020] Figure 3 It is a schematic cross-sectional structure diagram when the fixture structure of the present utility model clamps the workpiece.

[0021] Figure 4 It is a schematic partial exploded structure diagram of the fixture structure in the present utility model.

[0022] Figure 5 It is a schematic cross-sectional structure diagram of the rotary drive device in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present utility model will be further described below with reference to the drawings and embodiments.

[0024] As Figures 1 to 5 shown, a fixture structure of a sander includes a fixture base assembly 31. A clamping station 301 is provided on the top surface of the fixture base assembly 31. Several bearing clip assemblies 32 that slide back and forth in the radial direction are provided along the outer periphery of the clamping station 301 on the top surface of the fixture base assembly 31. A fixture screw plate 33 and a lifting drive device 34 for controlling the up and down lifting of the fixture screw plate 33 along the axial direction are further connected to the fixture base assembly 31. A fixture clamping rod 35 is provided between the fixture screw plate 33 and the bearing clip assemblies 32. The lower part of the fixture clamping rod 35 is rotatably hinged to the fixture screw plate 33, and the upper part of the fixture clamping rod 35 is rotatably hinged to the bearing clip assemblies 32. The up and down lifting fixture screw plate 33 drives the bearing clip assemblies 32 to slide back and forth through the fixture clamping rod 35 to realize the loosening or clamping of the workpiece A.

[0025] This sander adopts this fixture structure, enabling the fixture structure to adapt to the assembly line operation of the sander. Through the up-and-down movement of the fixture screw plate 33, several bearing clamp assemblies 32 are driven to slide horizontally back and forth, enabling the fixture structure to be fully compatible with workpieces A of various diameter specifications. The workpiece A is firmly and stably clamped, which can improve the fixing effect, ensure the machining accuracy of the workpiece A, and can quickly complete the grasping or releasing action, thus improving the machining efficiency.

[0026] In this embodiment, four bearing clamp assemblies 32 are provided, and the four bearing clamp assemblies 32 are distributed in a cross structure.

[0027] The bearing clamp assembly 32 includes a slide rail pair, a fixture sliding lock block 321, and a positioning bearing clamp 322. The fixture sliding lock block 321 is slidably connected to the top surface of the fixture seat assembly 31 through the slide rail pair. The positioning bearing clamp 322 is rotatably connected above the fixture sliding lock block 321 through a rotating shaft, and the positioning bearing clamp 322 is provided with a V-shaped clamping opening 3221 facing the clamping station 301.

[0028] The fixture sliding lock block 321 drives the positioning bearing clamp 322 to slide back and forth to complete the loosening or clamping action of the workpiece A. The positioning bearing clamp 322 is rotatably connected to the fixture sliding lock block 321. After the positioning bearing clamp 322 touches the workpiece A, the V-shaped clamping opening 3221 can automatically align and clamp the workpiece A by using the principle of a flexible fixture.

[0029] A pair of lock block hinge arms 3211 vertically extend downward at the rear end of the fixture sliding lock block 321, and the bottom ends of the lock block hinge arms 3211 are rotatably hinged to the upper part of the fixture clamp rod 35. A plurality of pairs of hinge seats 331 extend outwardly corresponding to the number of fixture screw plates 33 on the side of the fixture screw plate 33, and the hinge seats 331 are rotatably hinged to the lower part of the fixture clamp rod 35. By using the fixture clamp rod 35 to be movably hinged between the fixture sliding lock block 321 and the fixture screw plate 33, the up-and-down movement of the fixture screw plate 33 is converted into the back-and-forth sliding of the fixture sliding lock block 321.

[0030] The lifting drive device 34 includes a ball screw 341 and a stepper motor or a servo motor 342. The ball screw 341 is rotatably connected to the upper part of the fixture seat assembly 31 along the central axis direction. The stepper motor or the servo motor 342 is fixed to the lower part of the fixture seat assembly 31, and its output shaft is in transmission connection with the ball screw 341. The fixture screw plate 33 is fixed to the nut sleeve 343 of the ball screw 341. The up-and-down lifting of the fixture screw plate 33 is realized by using the ball screw 341, converting the rotary motion into a linear motion, which can reduce friction and noise, and can realize high-speed lifting according to the rotation speed of the stepper motor or the servo motor 342, with high motion efficiency.

[0031] The clamp seat assembly 31 includes a clamping jaw cylinder lock plate 311 and a rotating bearing sleeve 312, and the clamping jaw cylinder lock plate 311 and the rotating bearing sleeve 312 are connected by a plurality of optical axes 313. The clamp screw plate 33 is provided with a side hole 332 which forms a linear sliding fit with the optical axis 313. The clamp screw plate 33 cooperates with the optical axis 313 through the side hole 332 and has a certain guiding effect, which helps the clamp screw plate 33 to rise and fall.

[0032] A jig positioning shaft 36 is connected to the center of the top surface of the jig seat assembly 31, and a plurality of bearing clamp assemblies 32 are evenly distributed along the periphery of the jig positioning shaft 36. A jig positioning support plate 37 is connected to the top end of the jig positioning shaft 36. The jig positioning support plate 37 constitutes a clamping station 301. The jig replacement can be quickly completed by only replacing the jig positioning support plate 37.

[0033] The slide rail pair mainly includes a fixed slide rail 323 and a slider 324 slidably connected to the fixed slide rail 323. The fixed slide rail 323 is radially fixed on the top surface of the clamp cylinder lock plate 311, and the clamp sliding lock block 321 is fixed on the slider 324. In addition, the clamp cylinder lock plate 311 includes a circular main body, and the edge of the circular main body is radially extended with extension plates corresponding to the number of fixed slide rails 323. A part of the fixed slide rail 323 is arranged on the circular main body, and the other part is arranged on the extension plate. The pair of locking block articulated arms 3211 extend along the left and right sides of the fixed slide rail 323 and the extension plate to the bottom of the clamp cylinder lock plate 311 and are hinged to the clamp clamp rod 35.

[0034] A screw support 344 is provided on the top surface of the clamping jaw cylinder lock plate 311, and the top end of the ball screw 341 is rotatably connected to the screw support 344; a screw support seat 345 is provided on the top of the rotating bearing sleeve 312, and the bottom end of the ball screw 341 is rotatably connected to the screw support seat 345 and extends into the rotating bearing sleeve 312; the screw support 344 and the screw support seat 345 ensure the axial rotation of the ball screw 341.

[0035] The bottom of the rotating bearing sleeve 312 is also connected to a servo plate 314, the stepper motor or servo motor 342 is fixedly connected to the servo plate 314, and the output shaft of the stepper motor or servo motor 342 extends into the rotating bearing sleeve 312, and a coupling 346 is provided in the rotating bearing sleeve 312, and the lower end of the ball screw 341 is connected to the output shaft of the stepper motor or servo motor 342 through the coupling 346; the coupling 346 is used to prevent the ball screw 341 from being subjected to excessive load, and plays a role in overload protection. In addition, it has a function of compensating for offset. The coupling 346 can also compensate for the inaccurate manufacturing and installation between the two shafts.

[0036] It further includes a workbench 2, a rotary driving device 21 is installed on the workbench 2, the rotary driving device 21 is in transmission connection with a fixture seat assembly 31, and the rotary driving device 21 drives the fixture seat assembly 31 to rotate axially on the workbench 2; the entire fixture structure rotates axially through the rotary driving device 21.

[0037] A rotary bearing seat 201 is fixed on the workbench 2, and the fixture seat assembly 31 is rotatably connected to the rotary bearing seat 201 through a roller bearing 202.

[0038] The rotary driving device 21 includes a rotary closed-loop motor 211, a driving wheel is fixed on the output shaft of the rotary closed-loop motor 211, a driven wheel is fixed on the fixture seat assembly 31, and the rotary closed-loop motor 211 is in transmission connection with the fixture seat assembly 31 through the cooperation of the driving wheel and the driven wheel; the rotary closed-loop motor 211 can be a stepping motor, a servo motor, or a speed regulating motor.

[0039] The driving wheel is a driving pulley 212, the driven wheel is a driven pulley 213, and the driving pulley 212 is connected to the driven pulley 213 through a transmission belt 214.

[0040] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamp structure of a sanding machine, comprising a clamp seat assembly, wherein the top surface of the clamp seat assembly is provided with a clamping station, characterized in that: The top surface of the clamp seat assembly is provided with a plurality of bearing clamp assemblies that slide forward and backward in the radial direction along the outer periphery of the clamping station, and the clamp seat assembly is also connected with a clamp screw plate and a lifting drive device for controlling the clamp screw plate to lift up and down along the axial direction. A clamp clamp rod is provided between the clamp screw plate and the bearing clamp assembly, the lower part of the clamp clamp rod is rotatably hinged with the clamp screw plate, and the upper part of the clamp clamp rod is rotatably hinged with the bearing clamp assembly. The clamp screw plate that lifts up and down drives the bearing clamp assembly to slide forward and backward through the clamp clamp rod to realize the loosening or clamping of the workpiece; The bearing clamp assembly includes a slide rail pair, a fixture sliding lock block and a positioning bearing clamp, the fixture sliding lock block is slidably connected to the top surface of the fixture seat assembly through the slide rail pair, the positioning bearing clamp is rotatably connected to the top of the fixture sliding lock block through a rotating shaft, and the positioning bearing clamp is provided with a V-shaped clamp opening facing the clamping station; A pair of locking block hinged arms extend vertically downward from the rear end of the clamp sliding locking block, and the bottom ends of the locking block hinged arms are rotatably hinged to the upper part of the clamp clamping rod; a number of pairs of hinged seats extend outward from the side of the clamp screw plate corresponding to the number of the clamp screw plates, and the hinged seats are rotatably hinged to the lower part of the clamp clamping rod.

2. A sanding machine fixture structure according to claim 1, characterized in that : The lifting drive device includes a ball screw and a stepper motor or a servo motor. The ball screw is connected to the upper part of the clamp seat assembly and rotates along the central axis direction. The stepper motor or the servo motor is fixed to the lower part of the clamp seat assembly, and its output shaft is connected to the ball screw. The clamp screw plate is fixed on the nut sleeve of the ball screw.

3. A clamp structure for a sanding machine according to claim 2, characterized in that :The clamp seat assembly includes a clamping jaw cylinder locking plate and a rotating bearing sleeve, the clamping jaw cylinder locking plate and the rotating bearing sleeve are connected by several optical axes, and the clamp screw plate is provided with a side hole that forms a linear sliding fit with the optical axis.

4. A clamp structure for a sanding machine according to claim 1, characterized in that : The center of the top surface of the fixture seat assembly is connected to a fixture positioning shaft, and several bearing clamp assemblies are evenly distributed along the outer circumference of the fixture positioning shaft. The top end of the fixture positioning shaft is connected to a fixture positioning support plate, and the fixture positioning support plate constitutes a clamping station.

5. The clamp structure of a sanding machine according to claim 3, characterized in that : A screw support is provided on the top surface of the clamping jaw cylinder lock plate, and the top end of the ball screw is rotatably connected to the screw support; a screw support seat is provided on the top of the rotating bearing sleeve, and the bottom end of the ball screw is rotatably connected to the screw support seat and extends into the rotating bearing sleeve.

6. A clamp structure for a sanding machine according to claim 5, characterized in that : The bottom of the rotating bearing sleeve is also connected to a servo plate, the stepper motor or servo motor is fixedly connected to the servo plate, and the output shaft of the stepper motor or servo motor extends into the rotating bearing sleeve, a coupling is provided in the rotating bearing sleeve, and the lower end of the ball screw is transmission-connected to the output shaft of the stepper motor or servo motor through the coupling.

7. A clamp structure for a sanding machine according to claim 1, characterized in that : It also includes a workbench, on which a rotation driving device is installed. The rotation driving device is transmission-connected to the fixture seat assembly, and the rotation driving device drives the fixture seat assembly to rotate axially on the workbench.

8. A clamp structure for a sanding machine according to claim 7, characterized in that The rotary drive device includes a rotary closed-loop motor, a driving wheel is fixed on the output shaft of the rotary closed-loop motor, a driven wheel is fixed on the clamp seat assembly, and the rotary closed-loop motor is transmission-connected to the clamp seat assembly through the cooperation of the driving wheel and the driven wheel.

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