Rotary loading fixture

Abstract

A rotary loading fixture includes a mounting base, a rotary assembly disposed on the mounting base, and a loading assembly disposed below the rotary assembly. The rotary assembly penetrates one side of the mounting base. The rotary assembly includes a lead screw mounted on the mounting base by a flange nut, a rotary plate fixedly disposed on one end of the lead screw, and a fixed hole disposed on one side of the mounting base where the lead screw is mounted. The lead screw rotates in the mounting base to drive the rotary plate and the loading assembly to rotate, so that the piston is clamped by the positioning pin. The rotary plate is located inside the mounting base, and the rotary hole on the rotary plate is connected to the fastener in the fixed hole by an elastic member. The rotary loading fixture is provided with the rotary assembly to assist in positioning and mounting the piston, and the compression assembly is provided to enable the piston to be tightly mounted on the machine tool after positioning, which is suitable for the automatic loading and unloading process of the piston.

Description

Technical Field

[0001] This utility model relates to the field of cylinder grippers, and in particular to a rotary feeding clamp. Background Technology

[0002] With the continuous development of automation technology, cylinder grippers have been widely used in automated production lines due to their advantages such as simple structure, fast response speed, low cost, and easy maintenance.

[0003] A patent application published on the Chinese patent website (CN222389068U) discloses a three-finger pneumatic gripper for loading and unloading materials. The gripper includes a frame, a drive mechanism fixedly mounted on the inner wall of the frame, a gripping mechanism fixedly mounted at the bottom of the drive mechanism, and a lifting mechanism fixedly mounted at one end inside the drive mechanism. This three-finger pneumatic gripper has flexible movement capabilities and can grip objects of different shapes and sizes.

[0004] However, the three-finger cylinder gripper used for loading and unloading cannot directly engage the bearing hole on the piston with the locating pin on the machine tool spindle when facing a piston that needs to be positioned and machined by the machine tool. Currently, the mainstream processing method is manual rotation loading, which is labor-intensive and inefficient. Utility Model Content

[0005] In view of this, the present invention provides a rotary feeding fixture to meet the function of automated rotary positioning piston, thereby satisfying the piston processing requirements.

[0006] A rotary loading clamp holds a piston with multiple bearing holes. A machine tool spindle has a positioning mold via a chuck, and the positioning mold has a positioning pin. The bearing holes of the piston are positioned and installed with the positioning pin. The clamp includes a mounting base, a rotating assembly mounted on the mounting base, and a loading assembly located below the rotating assembly. The rotating assembly extends through one side of the mounting base. The rotating assembly includes a lead screw mounted on the mounting base, a rotating plate fixed to one end of the lead screw, and multiple fixing holes on the side of the mounting base where the lead screw is mounted. The lead screw rotates and moves axially within the mounting base, synchronously driving the rotating plate and the loading assembly to rotate and move axially together, facilitating the rotational locking of the piston with the positioning pin. The rotating plate is located inside the mounting base. The rotating holes on the rotating plate are connected to fasteners in the fixing holes via elastic elements. The feeding assembly includes a first cylinder gripper located at the end of the rotating assembly away from the mounting base, multiple first clamps located at the output end of the first cylinder gripper, and a clamping assembly located inside the first cylinder gripper. On the side of the first clamps away from the first cylinder gripper, the multiple first clamps are joined together to form a gripping groove for gripping a piston. The multiple first clamps are spaced apart, with the clamping assembly positioned between them. The clamping assembly includes multiple mounting accessories fixedly mounted on the side of the cylinder gripper away from the mounting base, a claw elastically connected to the mounting accessories, and multiple locking screws connecting the mounting accessories and the claw. One end of each locking screw is movably connected to the mounting accessory, and the other end is fixedly connected to the claw. A spring is fitted onto each locking screw, with one end of the spring abutting against the locking screw and the other end abutting against the claw.

[0007] Furthermore, the three surfaces of the mounting base are connected in pairs and arranged perpendicular to each other.

[0008] Furthermore, the rotary loading fixture also includes a unloading assembly disposed on the outside of the mounting base, and the unloading assembly and the robot arm are respectively mounted on two other different surfaces on the outside of the mounting base.

[0009] Furthermore, the torsion angle of the tension spring is consistent with the rotation direction of the lead screw.

[0010] Furthermore, the torsion angle of the elastic element is consistent with the rotation direction of the lead screw.

[0011] Furthermore, the first cylinder gripper includes a cylinder connected to one end of the lead screw via a cylinder seat, and a plurality of grippers movably disposed at the output end of the cylinder. On the side of the first clamp facing the first cylinder gripper, a single first clamp is engaged with a single gripper and fixed by fasteners.

[0012] Furthermore, the unloading assembly includes a second gripper cylinder and a second clamp disposed below the second gripper cylinder.

[0013] Furthermore, when the feeding assembly clamps the piston, the piston abuts against the clamping assembly, and the clamping assembly is squeezed and moves toward the mounting fitting, thus compressing the spring.

[0014] Compared with the prior art, the rotary feeding fixture provided by this utility model is configured such that the bearing hole of the driving piston of the rotary assembly rotates towards the positioning pin for positioning and locking. The rotation direction of the elastic element is set to be consistent with the rotation direction of the lead screw, increasing the reset torque of the elastic element so that the rotary assembly can reset after the piston is loaded. A clamping assembly is provided, which uses its anti-deformation force to push the piston, so that the bearing hole and the positioning pin can be pressed tightly together after locking. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a rotary feeding fixture provided by this utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the lead screw and rotating blade of the rotary feeding fixture.

[0017] Figure 3 This is a schematic diagram of the structure of the first clamp of the rotary feeding fixture.

[0018] Figure 4 This is a structural schematic diagram of the first clamp of the rotary feeding fixture from another perspective.

[0019] Figure 5 This is a schematic diagram of the clamping assembly of the rotary feeding fixture.

[0020] Figure 6 This is a schematic diagram of the structure of the piston gripped by the rotary feeding fixture.

[0021] Figure 7 A cross-sectional view of the locating pin on the positioning mold of the machine tool used to assemble the piston. Detailed Implementation

[0022] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0023] The terminology used herein is intended to explain the embodiments and is not intended to limit and / or restrict the present invention. It should be understood that the terms "front," "rear," "left," "right," "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0024] Please see Figures 1 to 7 This is a structural schematic diagram of a rotary loading clamp provided by this utility model. The rotary loading clamp includes a mounting base 10, a rotating component 20 disposed on the mounting base 10, a loading component 30 fixedly disposed below the rotating component 20, and a unloading component 40 disposed outside the mounting base 10. It is conceivable that the rotary loading clamp also includes other functional modules, such as sealing rings, which are technologies known to those skilled in the art and will not be described in detail here.

[0025] like Figure 6 , Figure 7 As shown, the rotary loading fixture is used to clamp the piston 500 for loading and unloading. The piston 500 is provided with multiple bearing holes 501, and the spindle of the processing machine tool is provided with a positioning mold 600 via a chuck. The positioning mold 600 is provided with positioning pins 601. The bearing holes 501 of the piston 500 are positioned and installed with the positioning pins 601.

[0026] like Figure 1 As shown, the three surfaces of the mounting base 10 are connected in pairs and arranged perpendicularly to each other. The rotating assembly 20 passes through one side of the mounting base 10, and the unloading assembly 40 and the robot arm are respectively mounted on two other different surfaces on the outside of the mounting base 10. The mounting base 10 is controlled by the robot arm and moves between the piston 500 to be processed and the machine tool.

[0027] like Figure 1 , 2As shown, the rotating assembly 20 includes a lead screw 21 mounted on the mounting base 10 via a flange nut, a rotating plate 22 fixedly disposed at one end of the lead screw 21, and a plurality of fixing holes 23 disposed on the side of the mounting base 10 where the lead screw 21 is mounted. The lead screw 21 rotates and moves axially within the mounting base 10, thereby synchronously driving the rotating plate 22 and the feeding assembly 30 to rotate and move axially together, so that the piston 500 and the positioning pin 601 can be rotated and locked. The rotating plate 22 is located inside the mounting base 10, and the rotating hole 221 on the rotating plate 22 is connected to the fastener in the fixing hole 23 by an elastic element such as a tension spring. The torsion angle of the elastic element is consistent with the rotation direction of the lead screw 21 to increase the reset torque of the elastic element, so that the lead screw 21 can be reset after rotation.

[0028] like Figure 1 As shown, the feeding assembly 30 includes a first cylinder gripper 31 disposed at one end of the rotating assembly 20 away from the mounting base 10, a plurality of first clamps 32 disposed on the output end of the first cylinder gripper 31, and a clamping assembly 33 disposed inside the first cylinder gripper 31.

[0029] The first cylinder gripper 31 includes a cylinder 311 connected to one end of the lead screw 21 via a cylinder seat, and a plurality of grippers 312 movably disposed at the output end of the cylinder 311. Under the control of the cylinder 311, the plurality of grippers 312 move closer to or further away from each other, causing the first clamp 32 to move away from or closer to the center. The first cylinder gripper 31 is a common technology and will not be described in detail here.

[0030] like Figure 3 , 4 As shown, on the side of the first clamp 32 facing the first cylinder jaw 31, a single first clamp 32 is engaged with a single jaw 312 and secured by fasteners. On the side away from the first cylinder jaw 31, multiple first clamps 32 are joined together to form a clamping groove 321 for clamping the piston 500. When multiple first clamps 32 are tightly joined, their outer contours are circular, and the clamping grooves 321 are fan-shaped and facing each other, so that multiple clamping grooves 321 can be joined to form a circular groove with the same center as multiple first clamps 32. The first clamp 32 is driven by the first cylinder jaw 31 to change the diameter of the clamping groove 321, so that the clamping groove 321 can clamp the piston 500. Multiple first clamps 32 are spaced apart, and clamping components 33 are provided between them.

[0031] like Figure 5As shown, the clamping assembly 33 includes multiple mounting accessories 331 fixedly disposed on the side of the first cylinder jaw 31 facing the clamping assembly 33, a jaw member 332 elastically connected to the mounting accessories 331, and multiple locking screws 333 connecting the mounting accessories 331 and the jaw member 332. It is conceivable that the number of mounting accessories 331 is determined by the number of jaws 312. The mounting accessories 331 and jaws 312 are spaced apart. One end of the locking screw 333 is movably connected to the mounting accessory 331, and the other end is fixedly connected to the jaw member 332. A spring is fitted onto the locking screw 333, with one end abutting against the locking screw 333 and the other end abutting against the jaw member 332. The spring's own elasticity causes the jaw member 332 to move away from 331, so that the jaw member 332 applies a thrust to the piston 500 when resetting. When the feeding assembly 30 clamps the piston 500, the piston 500 abuts against the clamping assembly 33. The clamping assembly 33 is compressed and moves towards the mounting accessory 331, compressing the spring. The first clamp 32 is driven by the first cylinder jaw 31 to clamp the piston 500. After the bearing hole 501 of the piston 500 is engaged with the positioning pin 601, the first clamp 32 releases its grip on the piston 500, causing the clamping assembly 33 to reset and push the piston 500, thereby achieving the clamping installation of the piston 500 on the positioning pin 601.

[0032] like Figure 1 As shown, the unloading assembly 40 includes a second gripper cylinder 41 and a second clamp 42 disposed below the second gripper cylinder 41. The second gripper cylinder 41 and the second clamp 42 have the same structure as the first cylinder gripper 31 and the first clamp 32, and will not be described again here. Under the control of the robot arm, the unloading assembly 40 clamps the processed piston 500 and removes the piston 500 from the machine, so that the piston 500 to be processed can continue to be loaded for processing.

[0033] The specific steps are as follows: 1. The clamping assembly 33 abuts against the piston 500 and is deformed by compression. The feeding cylinder 31 drives multiple first clamps 32 to hold the piston 500. 2. The mounting base 10, controlled by a robot, moves the piston 500 to the positioning mold 600 of the machine tool. The robot applies pressure to the rotating assembly 20, causing the piston 500 to press tightly against one end of the positioning pin 601. At this time, the lead screw 21 drives the piston 500 to rotate and retract. Since the robot continuously applies pressure to the rotating assembly 20, even during the rotation and retraction movement, the piston 500 can still be kept close to one end of the positioning pin 601. The bearing hole 501 is positioned aligned with the positioning pin 601 by the rotation of the piston 500. When the bearing hole 501 on the piston 500 rotates to be positioned with the positioning pin 601, under the pressure of the robot, the bearing hole 501 on the piston 500 engages with the positioning pin 601. 3. After the positioning and clamping are completed, the cylinder gripper 31 releases its grip on the piston 500, and the anti-deformation force generated by the resetting clamping assembly 33 pushes the piston 500, so that the piston 500 is pressed and installed with the positioning pin 601. 4. After the loading is completed, the robot returns to its original position, and the elastic element retracts to pull the lead screw 21 to reset. 5. The loading cylinder 31 clamps the new piston 500, and the unloading assembly 40 unloads the original piston 500. This cycle is repeated to achieve automated loading and unloading of the piston 500.

[0034] Compared with the prior art, the rotary feeding fixture provided by this utility model is configured such that the rotary assembly 20 drives the piston 500 to rotate and retract, and the piston 500 is positioned and engaged with the positioning pin 601 under the pressure of the manipulator. The rotation direction of the elastic element is set to be consistent with the rotation direction of the lead screw 21, increasing the reset torque of the elastic element so that the rotary assembly 20 can reset after the piston 500 is loaded. The clamping assembly 33 is provided, and the anti-deformation force of the clamping assembly 33 pushes the piston 500 so that the bearing hole 501 and the positioning pin 601 can be pressed together after engagement.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications, equivalent substitutions or improvements within the spirit of the present utility model are covered within the scope of the claims of the present utility model.

Claims

1. A rotary feeding fixture, wherein the rotary feeding fixture clamps a piston, the piston having a plurality of bearing holes, a positioning mold is mounted on the spindle of a machine tool via a chuck, the positioning mold having a positioning pin, and the bearing holes of the piston being positioned and installed with the positioning pin, characterized in that: The rotary loading fixture includes a mounting base, a rotating assembly mounted on the mounting base, and a loading assembly located below the rotating assembly. The rotating assembly extends through one side of the mounting base and includes a lead screw mounted on the mounting base, a rotating plate fixedly mounted at one end of the lead screw, and multiple fixing holes on the side of the mounting base where the lead screw is mounted. The lead screw rotates and moves axially within the mounting base, thereby synchronously driving the rotating plate and the loading assembly to rotate and move axially together, so as to facilitate the rotational engagement of the piston and the positioning pin. The rotating plate is located inside the mounting base, and the rotating holes on the rotating plate are connected to the fasteners in the fixing holes by elastic elements. The loading assembly includes a component located away from the rotating assembly. On the output end of the first cylinder gripper at one end of the mounting base, there are multiple first clamps disposed below the first cylinder gripper, and a clamping assembly disposed inside the first cylinder gripper. On the side of the first clamps away from the first cylinder gripper, the multiple first clamps are spliced ​​together to form a gripping groove for gripping a piston. The multiple first clamps are spaced apart, and the clamping assembly is disposed between them. The clamping assembly includes multiple mounting accessories fixedly disposed on the side of the cylinder gripper away from the mounting base, a claw elastically connected to the mounting accessories, and multiple locking screws connecting the mounting accessories and the claw. One end of the locking screw is movably connected to the mounting accessories, and the other end is fixedly connected to the claw. A spring is sleeved on the locking screw, and one end of the spring abuts against the locking screw, and the other end abuts against the claw.

2. The rotary feeding fixture as described in claim 1, characterized in that: The three sides of the mounting base are connected in pairs and arranged perpendicularly to each other.

3. The rotary feeding fixture as described in claim 1, characterized in that: The rotary loading fixture also includes a unloading assembly disposed on the outside of the mounting base. The unloading assembly and the robot are respectively mounted on two other different surfaces on the outside of the mounting base.

4. The rotary feeding fixture as described in claim 1, characterized in that: The torsion angle of the elastic element is consistent with the rotation direction of the lead screw.

5. The rotary feeding fixture as described in claim 1, characterized in that: The first cylinder gripper includes a cylinder connected to one end of the lead screw via a cylinder seat, and a plurality of grippers movably disposed at the output end of the cylinder. On the side of the first clamp facing the first cylinder gripper, a single first clamp is engaged with a single gripper and fixed by fasteners.

6. The rotary feeding fixture as described in claim 3, characterized in that: The unloading assembly includes a second gripper cylinder and a second clamp disposed below the second gripper cylinder.

7. The rotary feeding fixture as described in claim 1, characterized in that: When the feeding assembly clamps the piston, the piston abuts against the clamping assembly, and the clamping assembly is squeezed and moves toward the mounting accessory, thus compressing the spring.

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