Multi-specification grabbing mechanism suitable for commercial vehicle crankshafts

Abstract

The multi-specification grabbing mechanism comprises two sets of clamping mechanisms, each clamping mechanism comprises a two-finger air cylinder, a pneumatic clamping jaw is installed at the movable end of each two-finger air cylinder, a transferring platform is arranged at the bottom of each two-finger air cylinder and connected to a two-way lead screw in a threaded mode, and a clamping jaw is installed on the transferring platform. The end of the two-way lead screw is connected with a driving mechanism, the transfer platform is slidably connected to the mounting base in a clamped mode, and the end of the transfer platform is connected with the movable end of the drag chain. The manipulator is scientific and reasonable in structural design, the servo motor, the two-way screw rod, the two-finger cylinder, the transfer platform, the pneumatic clamping jaw and other structures are matched for use, the requirements for grabbing and detecting workpieces of various sizes are met at the same time, labor force is liberated, operation is easy, the labor intensity and the labor cost are greatly reduced, station production accidents are reduced, and the production efficiency is improved. Positioning is accurate, and remodeling is rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of grabbing fixture equipment, in particular to a multi-specification grabbing mechanism suitable for commercial vehicle crankshafts. Background Art

[0002] In order to cooperate with the advancement of automation equipment, considering the characteristics of commercial vehicle crankshafts, such as multiple specifications (14 types), large size (length 1.2 meters), and heavy weight (245 kilograms), it is necessary to change the existing manual lifting method to robot grabbing to achieve automatic operation. The current grabbing mechanism has complex structure and inconvenience in use, which reduces work efficiency. To this end, we propose a multi-specification grabbing mechanism suitable for commercial vehicle crankshafts. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-specification grabbing mechanism suitable for commercial vehicle crankshafts to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-specification grasping mechanism suitable for commercial vehicle crankshafts, comprising two groups of clamping mechanisms, the clamping mechanism comprising a two-finger cylinder, the movable ends of the two-finger cylinders are equipped with pneumatic clamps, a transfer platform is provided at the bottom of the two-finger cylinders, the transfer platform is screwed on a bidirectional screw rod, the end of the bidirectional screw rod is connected to a driving mechanism, the transfer platform can be slidably clamped on a mounting seat, the end of the transfer platform is connected to the movable end of the drag chain, and a laser displacement sensor is installed on the side of the shell of the two-finger cylinder.

[0005] In the above solution, the bidirectional screw rod is provided with two left and right threaded portions in opposite directions.

[0006] In the above solution, the bidirectional screw is movably mounted on the screw bearing seat.

[0007] In the above solution, the driving mechanism includes a servo motor, and the output end of the servo motor is transmission-connected to the end of the bidirectional lead screw through a coupling.

[0008] In the above solution, a linear guide rail is arranged above the mounting seat, and the linear guide rail is clamped in the guide groove at the bottom of the transfer platform.

[0009] In the above solution, the drag chain is installed on a bracket.

[0010] The above solution also includes a PLC, and the PLC is electrically connected to the laser displacement sensor.

[0011] Compared with the prior art, the beneficial effects of the utility model are: this multi-specification grasping mechanism suitable for commercial vehicle crankshafts has a simple and reasonable structural design and strong practicality. It is used in conjunction with structures such as a servo motor, a bidirectional screw rod, a two-finger cylinder, a transfer platform, and a pneumatic clamp to meet the needs of grasping and detecting various workpiece sizes, liberate labor, and is simple to operate. It greatly reduces manual labor intensity and labor costs, reduces the occurrence of production accidents at workstations, has accurate positioning, and fast changeover. It can cope with all types of machines, has a fast changeover speed, and is highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a partial structural schematic diagram of the utility model.

[0014] Figure 3 It is a side structural schematic diagram of the utility model.

[0015] In the figure: 1, servo motor 2, coupling 3, screw bearing seat 4, bidirectional screw 5, linear guide 6, two-finger cylinder 7, laser displacement sensor 8, transfer platform 9, pneumatic clamp 10, drag chain 11, bracket 12, mounting base. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-3 The utility model provides a technical solution: a multi-specification grasping mechanism suitable for commercial vehicle crankshafts, including two groups of clamping mechanisms, the clamping mechanism includes a two-finger cylinder 6, the movable end of the two-finger cylinder 6 is equipped with a pneumatic clamp 9, the bottom of the two-finger cylinder 6 is provided with a transfer platform 8, the transfer platform 8 is screwed on the bidirectional screw rod 4, the end of the bidirectional screw rod 4 is connected to a driving mechanism, the transfer platform 8 can be slidably clamped on the mounting seat 12, the end of the transfer platform 8 is connected to the movable end of the drag chain 10, and the shell side of the two-finger cylinder 6 is equipped with a laser displacement sensor 7.

[0018] By setting up the servo motor 1, bidirectional screw rod 4, two-finger cylinder 6, transfer platform 8, pneumatic clamp 9 and other structures for use, it can meet the requirements of grabbing and testing various workpiece sizes, liberate labor, and is simple to operate, greatly reducing the labor intensity and labor costs, and reducing the occurrence of production accidents at workstations. It has accurate positioning and fast changeover, and can cope with all types of machines, with fast changeover speed and high efficiency. The crankshaft of a commercial vehicle is clamped by the cooperation of two pneumatic clamps 9.

[0019] In the above solution, the bidirectional screw rod 4 is provided with two left and right sections of threaded parts in opposite directions. The two transfer platforms 8 are correspondingly screwed on the two sections of threaded parts.

[0020] In the above solution, the bidirectional screw 4 is movably mounted on the screw bearing seat 3.

[0021] In the above solution, the driving mechanism includes a servo motor 1 , and the output end of the servo motor 1 is transmission-connected to the end of a bidirectional screw rod 4 through a coupling 2 .

[0022] In the above scheme, a linear guide rail 5 is arranged above the mounting seat 12, and the linear guide rail 5 is clamped in the guide groove at the bottom of the transfer platform 8. The servo motor 1 drives the bidirectional screw 4 to rotate, thereby driving the transfer platform 8 to move along the lateral direction of the bidirectional screw 4. At this time, under the action of the linear guide rail 5, the stability of the transfer platform 8 during movement is improved.

[0023] In the above solution, the drag chain 10 is installed on the bracket 11. The coordination of the drag chain 10 further improves the stability of the transfer platform 8 during movement.

[0024] The above solution further includes a PLC, and the PLC is electrically connected to the laser displacement sensor 7. The laser displacement sensor 7 can detect objects passing by the side.

[0025] Working principle:

[0026] This kind of multi-specification gripping mechanism suitable for commercial vehicle crankshafts has different gripping shaft diameters and relative position sizes due to the large variety of commercial vehicle crankshaft workpieces. Considering the maximum workpiece weight of 245KG and the rapidity of changeover, the gripping mechanism is designed to be more compatible with the production line. The mechanism consists of Siemens servo motor, coupling 2, screw bearing seat 3, bidirectional screw 4, linear guide 5, SCHUNK two-finger cylinder 6, laser displacement sensor 7 and other components. The workpiece completed in the previous process is manually placed on the conveyor roller and transported to the 3D visual photography area. After the visual photography, the gripping coordinates and machine model information are fed back to the PLC. The PLC controls the robot to adjust the size between the grippers, and the two pneumatic grippers 9 cooperate to grab the workpiece through the two-finger cylinder 6. After the gripping is completed, the laser displacement sensor 7 on the side detects the stroke of the clamping block, and feeds the value back to the PLC. The gripping shaft diameter is confirmed by calculating the stroke.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-specification gripping mechanism suitable for commercial vehicle crankshafts, comprising two sets of clamping mechanisms, characterized in that: The clamping mechanism comprises a two-finger cylinder (6), a pneumatic clamp (9) is installed at the movable end of the two-finger cylinder (6), a transfer platform (8) is arranged at the bottom of the two-finger cylinder (6), the transfer platform (8) is screwed on the bidirectional screw rod (4), the end of the bidirectional screw rod (4) is connected to a driving mechanism, the transfer platform (8) can be slidably clamped on the mounting seat (12), the end of the transfer platform (8) is connected to the movable end of the drag chain (10), and a laser displacement sensor (7) is installed on the side of the shell of the two-finger cylinder (6).

2. A multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: The bidirectional screw rod (4) is provided with two left and right sections of threaded parts in opposite directions.

3. The multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: The bidirectional screw rod (4) is movably mounted on the screw rod bearing seat (3).

4. The multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: The driving mechanism comprises a servo motor (1), and the output end of the servo motor (1) is transmission-connected to the end of a bidirectional screw rod (4) via a coupling (2).

5. The multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: A linear guide rail (5) is arranged above the mounting seat (12), and the linear guide rail (5) is clamped in a guide groove at the bottom of the transfer platform (8).

6. The multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: The drag chain (10) is installed on a bracket (11).

7. The multi-specification grabbing mechanism for commercial vehicle crankshafts according to claim 1, characterized in that: A PLC is also included, and the PLC is electrically connected to the laser displacement sensor (7).

Images