Floating mechanism for automatic assembly of robot

Abstract

The invention discloses a floating mechanism for automatic assembly of a robot, and belongs to the technical field of automatic assembly. According to the technical scheme, a mounting plate and a bottom plate are vertically arranged, a jacking air cylinder is fixed to the bottom of the bottom plate, the output end of the jacking air cylinder penetrates through the bottom plate and is connected with the mounting plate, a plurality of guide columns are arranged at the bottom of the mounting plate, the bottoms of the guide columns penetrate through the bottom plate and guide sleeves on the bottom plate, and the guide columns are in sliding fit with the guide sleeves; and a steel ball roller and a limiting pin which are used for positioning the assembly jig are arranged on the mounting plate. The device has the beneficial effects that the steel ball rollers are matched with the inner concave cambered surfaces, so that the movement error of the robot is corrected, the assembly precision is improved, friction and collision between workpieces caused by errors are avoided, and the assembly quality is improved.

Description

Technical Field

[0001] The invention relates to a floating mechanism for robot automatic assembly, belonging to the technical field of automatic assembly. Background Art

[0002] In the robot assembly operation, there will be slight differences in the robot's movement trajectory each time. Such slight differences will cause friction and collision between workpieces in high-precision assembly. In mild cases, it will affect the assembly quality. In severe cases, it will cause the workpiece to be scrapped or damage the robot. Therefore, a floating mechanism should be designed to solve the above problems. Summary of the invention

[0003] In order to solve the defects of the prior art, the purpose of the present invention is to provide a floating mechanism for robot automatic assembly which can correct errors and ensure assembly accuracy.

[0004] The technical solution of the present invention is: a floating mechanism for robot automatic assembly, including a mounting plate and a base plate arranged up and down, a lifting cylinder is fixed to the bottom of the base plate, the output end of the lifting cylinder passes through the base plate and is connected to the mounting plate, a plurality of guide columns are arranged at the bottom of the mounting plate, the bottom of the guide columns passes through the base plate and the guide sleeves on the base plate, the guide columns and the guide sleeves are slidably matched, a limit pad is arranged at the bottom of the guide columns, and a steel ball roller and a limit pin for positioning the assembly jig are arranged on the mounting plate.

[0005] A blocking cylinder is fixed on the side of the bottom plate, and a blocking working end on the top of the blocking cylinder can move upward to the upper side of the mounting plate.

[0006] There are four steel ball rollers, which are located at the four corners of the directional mounting plate.

[0007] The output end of the lifting cylinder is connected to the center of the mounting plate.

[0008] There are three guide pillars distributed in an equilateral triangle.

[0009] There are two limit pins, which are located in the middle of both sides of the mounting plate.

[0010] The assembly fixture is located on the floating return plate, and the bottom of the floating return plate is provided with an inner concave arc surface that cooperates with the steel ball roller.

[0011] A limiting hole cooperating with the limiting pin is provided at the bottom of the floating return plate.

[0012] The beneficial effects of the present invention are as follows: the steel ball roller cooperates with the inner concave arc surface to correct the movement error of the robot, improve the assembly accuracy, avoid friction and collision between workpieces caused by the error, and improve the assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A perspective view of the present invention;

[0014] Figure 2 It is a working state diagram of the present invention.

[0015] The reference numerals in the figure are as follows: 1. base plate, 2. guide sleeve, 3. guide column, 4. limit pad, 5. mounting plate, 6. steel ball roller, 7. limit pin, 8. lifting cylinder, 9. assembly fixture, 10. floating return plate, 11. blocking cylinder. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-2 The present invention is further described:

[0017] A floating mechanism for automatic assembly of a robot comprises a mounting plate 5 and a base plate 1 arranged up and down, a lifting cylinder 8 being fixed at the bottom of the base plate 1, an output end of the lifting cylinder 8 penetrating the base plate 1 and connected to the bottom center of the mounting plate 5, three guide posts 3 distributed in an equilateral triangle are arranged at the bottom of the mounting plate 5, the bottom of the guide posts 3 penetrating the base plate 1 and the guide sleeve 2 on the base plate 1, the guide posts 3 and the guide sleeve 2 are slidably matched to accurately guide the up and down movement of the mounting plate 5, a limiting pad 4 is arranged at the bottom of the guide post 3, the limiting pad 4 is used to limit the maximum stroke of the guide post 3, so that the height of the mounting plate 5 is consistent each time, and four steel ball rollers 6 and two limiting pins 7 for positioning the assembly jig 9 are arranged on the mounting plate 5, the four steel ball rollers 6 are located at the four corners of the mounting plate 5 in the direction, and the two limiting pins 7 are located in the middle of both sides of the mounting plate 5. A blocking cylinder 11 is fixed to the side of the base plate 1 , and the blocking working end at the top of the blocking cylinder 11 can move upward to the upper side of the mounting plate 5 . When the assembly jig 9 is transferred to the top of the floating mechanism, it will be blocked by the blocking cylinder 11 .

[0018] The assembly jig 9 is located on the floating return plate 10. The bottom of the floating return plate 10 is provided with an inner concave arc surface that cooperates with the steel ball roller 6. The steel ball roller 6 can roll in any direction. After the assembly is completed, the steel ball roller 6 will roll to the top of the arc of the inner concave arc surface of the floating return plate 10, thereby realizing the precise positioning of the floating return plate 10. The bottom of the floating return plate 10 is provided with a limiting hole that cooperates with the limiting pin 7 to position the floating return plate 10 and prevent the floating return plate 10 from moving after positioning.

[0019] When the assembly jig 9 is transferred to the top of the mounting plate 5, it will be blocked by the blocking cylinder 11, and then the lifting cylinder 8 will lift the mounting plate 5, and the assembly jig 9 will be lifted by the floating return plate 10. When the robot assembles on the assembly jig 9, the assembly jig 9 moves in all directions with the robot assembly. After each assembly is completed, the assembly jig must be put back on the floating mechanism. When putting it back, the steel ball roller 6 will move to the inner arc top of the concave arc surface of the floating return plate 10, so that the assembly jig 9 is accurately returned to the initial state, waiting for the next step of assembly.

[0020] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A floating mechanism for robot automatic assembly, characterized in that: The utility model comprises a mounting plate (5) and a bottom plate (1) arranged above and below, a lifting cylinder (8) is fixed at the bottom of the bottom plate (1), the output end of the lifting cylinder (8) passes through the bottom plate (1) and is connected to the mounting plate (5), a plurality of guide pillars (3) are arranged at the bottom of the mounting plate (5), the bottom of the guide pillars (3) passes through the bottom plate (1) and the guide sleeve (2) on the bottom plate (1), the guide pillars (3) and the guide sleeve (2) are slidably matched, a limiting pad (4) is arranged at the bottom of the guide pillars (3), and a steel ball roller (6) and a limiting pin (7) for positioning the assembly fixture (9) are arranged on the mounting plate (5).

2. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: A blocking cylinder (11) is fixed to the side of the bottom plate (1), and a blocking working end at the top of the blocking cylinder (11) can move upward to the upper side of the mounting plate (5).

3. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: There are four steel ball rollers (6) located at the four corners of the direction mounting plate (5).

4. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: The output end of the lifting cylinder (8) is connected to the center of the mounting plate (5).

5. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: There are three guide pillars (3) distributed in an equilateral triangle.

6. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: There are two limit pins (7), which are located in the middle of both sides of the mounting plate (5).

7. The floating mechanism for robot automatic assembly according to claim 1, characterized in that: The assembly jig (9) is located on a floating return plate (10), and the bottom of the floating return plate (10) is provided with an inner concave arc surface that cooperates with the steel ball roller (6).

8. The floating mechanism for robot automatic assembly according to claim 7, characterized in that: The bottom of the floating return plate (10) is provided with a limiting hole which cooperates with the limiting pin (7).

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