A flexible cleaning fixture

Abstract

The present invention discloses an unfolded flexible cleaning fixture, including a robot connecting plate, one end of the robot connecting plate is connected to the arm flange of a special cleaning robot, and the other end is connected to a clamp mounting plate, the end of the clamp mounting plate away from the robot connecting plate is fixedly connected to two air claws, the side of the air claw is provided with an upper pneumatic motor-controlled valve and a lower pneumatic motor-controlled valve, the end of the air claw away from the clamp mounting plate is provided with a clamp and a mounting plate, the clamp is connected to the air claw by bolts, a dial plate is provided on the side of the clamp, the mounting plate is connected to two positioning shafts through a flange, three sections of air bags are arranged at intervals on the positioning shaft, and an inflation joint for inflating the air bags is arranged near the flange of the positioning shaft. The present application can complete the four processes of separation, upper cover cleaning, cylinder head cleaning, and assembly with only one set of fixtures, without the need to add a code reading and writing device and a conveying tray, eliminating the subsequent assembly link, ensuring process reliability, and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of cleaning fixtures, and in particular to an unfoldable flexible cleaning fixture. Background Art

[0002] After finishing, the bore surface of the engine cylinder head needs to be thoroughly cleaned to meet the cleanliness requirements of the assembly process. For special cylinder heads that are processed after the upper cover and cylinder head are assembled (as shown below), the cleaning difficulty is relatively increased. Since the upper cover is a semi-closed structure, it is easy to hide dirt, so it must be disassembled for cleaning. The upper cover and cylinder head after disassembly must ensure unique correspondence during the cleaning process. If they are installed incorrectly, it will directly affect the assembly quality of the whole machine, resulting in problems such as camshaft locking or abnormal wear.

[0003] There are two existing cleaning solutions: the first is to disassemble the upper cover and cylinder head, clean them separately, and then assemble them according to the QR code information on the two bodies; the second is to disassemble the upper cover and cylinder head, transport the cylinder head and upper cover at the same time through a pallet for cleaning, and then output them for assembly after cleaning. The first solution uses code reading information for assembly, which requires the addition of a code reading and writing device, which increases the cost investment, and the matching process is relatively time-consuming and may result in misjudgment; the second solution uses pallet transportation, which requires the addition of a pallet round-trip roller in the feeding and unloading area, which requires additional investment, and after cleaning, it is necessary to add a secondary assembly link of the upper cover and cylinder head, and the overall efficiency is not high. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an expandable flexible cleaning fixture. First, the assembly bolts of the upper cover and the cylinder head are manually loosened and removed (without separation). Then, the cylinder head and the upper cover are automatically expanded and separated by the cleaning fixture. Then, they are cleaned separately. After the cleaning is completed, the matching assembly is completed. Moreover, the four processes of separation, upper cover cleaning, cylinder head cleaning, and assembly are all completed by a pair of fixtures. There is no need to add a code reading and writing device and a conveying tray, and the subsequent assembly link is omitted, which not only ensures the process reliability, but also improves the production efficiency.

[0005] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] A deployable flexible cleaning fixture comprises a robot connecting plate, one end of the robot connecting plate is connected to the arm flange of a special cleaning robot, and the other end is connected to a clamping claw mounting plate by bolts, the end of the clamping claw mounting plate away from the robot connecting plate is fixedly connected to two air claws by bolts, the side of the air claw is provided with an upper pneumatic motor-controlled valve and a lower pneumatic motor-controlled valve for detecting the clamping state of the air claw, the end of the air claw away from the clamping claw mounting plate is respectively provided with a clamping claw and a mounting plate, the clamping claw is connected to the air claw by bolts, a paddle is provided on the side of the clamping claw, the mounting plate is connected to two positioning shafts by a flange, three sections of air bags are arranged at intervals on the positioning shaft, and an inflation joint for inflating the air bag is provided near the flange of the positioning shaft.

[0007] Preferably, a long air hole is provided at the center of the positioning shaft, and intersecting air holes are provided at each airbag installation position, and the compressed air at the inflation port enters into the airbag through the long air hole and the intersecting air holes, thereby causing the airbag to expand and deform.

[0008] Preferably, the clamping jaw is driven to move by the air clamping jaw, and the paddle can move together with the clamping jaw.

[0009] Preferably, the clamp is provided with a plurality of cylinder head clamping points and a plurality of upper cover clamping points, the cylinder head clamping points are in contact with the bottom surface of the cylinder head, the upper cover clamping points are in contact with the top surface of the upper cover, and both are guided and positioned by the positioning shaft and the camshaft hole of the cylinder head or the upper cover.

[0010] Preferably, the paddle plate, the upper pneumatically controlled valve and the lower pneumatically controlled valve are located on the same side, and the paddle plate is used to compress the lever rollers of the upper pneumatically controlled valve and the lower pneumatically controlled valve.

[0011] Preferably, when the air gripper drives the clamping jaw to move and clamp the cylinder head, the shift plate is used to compress the lever roller of the upper pneumatic motor-controlled valve, the air outlet of the motor-controlled valve is connected, the single-acting cylinder connected to the upper pneumatic motor-controlled valve is extended, and the corresponding proximity switch sensing signal is triggered, and the air gripper is in a cylinder head clamping state.

[0012] Preferably, when the air gripper drives the clamping jaw to move and clamp the upper cover, the paddle plate is used to compress the lever rollers of the upper pneumatic motor-controlled valve and the lower pneumatic motor-controlled valve respectively, the two motor-controlled valve air outlets are connected, the two single-acting cylinders are extended for ventilation, and the two corresponding proximity switch sensing signals are triggered at the same time, and the air gripper is in the upper cover clamping state.

[0013] Preferably, the two air grippers are arranged symmetrically.

[0014] Preferably, the airbag is divided into three sections, which are respectively arranged at the front, middle and rear positions of the positioning axis.

[0015] The above technical solution of the present invention has the following beneficial effects:

[0016] The present invention provides an expandable flexible cleaning fixture, which can not only meet the cleaning requirements of the upper cover and the cylinder head, but also can separate and assemble the upper cover and the cylinder head online through an airbag expandable structure, eliminating the need for a code reader and a conveying tray, thereby reducing costs; and the upper cover and the cylinder head always remain unique during the cleaning process, which can effectively avoid the risk of assembly errors; and a pneumatically controlled valve is used on the cleaning fixture to confirm the clamping state, which can reduce the safety risk caused by electrical detection failure in water immersion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0018] Figure 1 It is an axonometric view of the unfolded flexible cleaning fixture of the present invention;

[0019] Figure 2 A cross-sectional view of the unfolded separation mechanism;

[0020] Figure 3 is the axonometric view of the gripper;

[0021] Figure 4 A schematic diagram of the cleaning fixture holding the upper cover;

[0022] Figure 5 Schematic diagram of the cleaning fixture holding the cylinder head;

[0023] Figure 6 This is the schematic diagram of the cleaning fixture clamping detection principle, where A is the loosened state, B is the cylinder head clamping state, and C is the upper cover clamping state.

[0024] In the figure: 1-robot connecting plate, 2-air claw mounting plate, 3-upper pneumatic motor-controlled valve, 4-push plate, 5-air claw, 6-gripper, 7-positioning shaft, 8-air bag, 9-positioning shaft mounting plate, 10-inflating joint, 11-lower pneumatic motor-controlled valve, 12-single-acting cylinder, 13-proximity switch, 14-upper cover, 15-cylinder head. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0026] Figure 1 FIG. 2 is an axonometric view of the unfolded flexible cleaning fixture of the present invention. Figure 1As shown, the robot mounting plate 1 is connected to the arm flange of the cleaning robot. The gripper mounting plate 2 is connected to the robot mounting plate 1 by bolts. The air gripper 5 is arranged in two places and is symmetrical on the left and right, and is fixed to the end of the gripper mounting plate 2 away from the robot mounting plate 1 by bolts. The upper pneumatic motor-controlled valve 3 and the lower pneumatic motor-controlled valve 11 are installed on the side of the air gripper 5 to detect the clamping state of the air gripper 5. The gripper 6 is connected to the claw head of the air gripper 5 by bolts to clamp the workpiece. The paddle plate 4 is installed on one side of the gripper 6 close to the air gripper 5 and can move with the gripper 6. The positioning shaft 7 (2 places on the left and right) is connected to the positioning shaft mounting plate 9 through a flange structure, and three sections of air bags 8 (2 places on the left and right) are arranged at the front, middle and rear positions of the positioning shaft 7 respectively. An inflation joint 10 (2 places on the left and right) is installed near the flange of the positioning shaft 7 to inflate the air bag 8.

[0027] Figure 2 is a cross-sectional view of the unfolded separation mechanism. Figure 2 As shown, a deep and long air hole is processed at the center of the positioning shaft 7, and intersecting air holes are processed at each airbag installation position. The compressed air at the inflation port can enter the airbag 8 through the central air hole and the intersecting air holes, causing it to expand and deform.

[0028] Figure 3 Axonometric view of the gripper. Figure 4 Schematic diagram of the cleaning fixture holding the upper cover. Figure 5 This is a schematic diagram of the cleaning fixture holding the cylinder head. Figure 3-Figure 5 As shown, the clamping jaw 6 is provided with cylinder head clamping points 601 (4 locations) and upper cover clamping points 602 (4 locations), and the air claw 5 drives the clamping jaw 6 to move. The cylinder head clamping point 601 contacts the bottom surface of the cylinder head, and the upper cover clamping point 602 contacts the top surface of the upper cover. Both are guided and positioned through the positioning shaft 7 and the camshaft hole of the cylinder head or the upper cover.

[0029] At present, the common clamping detection method of the air gripper 5 is a magnetic switch or a proximity switch. Since the cleaning fixture is in a water-immersed environment for a long time, the electrical detection method is prone to water ingress and failure, resulting in misjudgment of the clamping state, causing safety accidents such as the fall of the workpiece due to loose clamping. Therefore, this application also provides a method for pneumatically detecting the clamping state. Please refer to the attached Figure 6 , Figure 6 In the figure, A is the loosened state, B is the cylinder head clamped state, and C is the upper cover clamped state. Figure 6 In the released state, the lever rollers of the upper pneumatic motor-controlled valve 3 and the lower pneumatic motor-controlled valve 11 are in the pop-up state, the air outlet of the motor-controlled valve is not connected, and the single-acting cylinder 12 (2 locations) is arranged in a waterless environment other than cleaning. Initially, they are all in their original positions (not extended). At this time, the proximity switch 13 (2 locations) has no sensing signal, and the surface air claw 5 is in the released state; combined with Figure 5When the air claw 5 drives the clamping claw 6 to move and clamp the cylinder head, the paddle plate 4 compresses the lever roller of the upper pneumatic motor-controlled valve 3. At this time, the air outlet of the motor-controlled valve is connected, the single-acting cylinder 12 (right side) is ventilated and extended, and the proximity switch 13 (right side) is triggered by the induction signal, indicating that the air claw 5 is in the cylinder head clamping state; combined with Figure 4 When the air gripper 5 drives the clamping jaw 6 to move and clamp the upper cover, the paddle 4 compresses the lever rollers of the upper pneumatic motor-controlled valve 3 and the lower pneumatic motor-controlled valve 11 respectively. At this time, the air outlets of the two motor-controlled valves are connected, the single-acting cylinder 12 (2 places) is extended for ventilation, and the proximity switch 13 (2 places) senses the signal and triggers it at the same time, indicating that the air gripper 5 is in the upper cover clamping state. In the above manner, the clamping detection of the air gripper 5 can be freed from the electrical signal detection, avoiding the signal failure caused by the water environment, and greatly improving the detection reliability.

[0030] The expandable flexible cleaning fixture of the present application is used during:

[0031] Please refer to Figure 2 and Figure 4 After the bolts are removed, the upper cover and cylinder head enter the cleaning station in assembled state. After the workpiece is positioned, the robot cleaning fixture is used to Figure 4 After the airbag 8 is inflated, the airbag 8 expands and bulges, generating a radial thrust on the combination hole to separate it. Since the airbag 8 is a drum-type mechanism with thick ends and a thin middle, the deformation at both ends is small after inflation, and the airbag 8 can fit tightly with the shoulder of the positioning shaft 7 to ensure that the gas does not leak. Inflation in the thinner area in the middle will produce a large deformation, which separates the upper cover from the cylinder head positioning pin, and then the air claw 5 moves to clamp the upper cover for cleaning. After cleaning, it is placed in the temporary storage area. At this time, the airbag 8 is deflated and restored to its original state; see Figure 4 After the upper cover is cleaned, the robot arm rotates the cleaning fixture 180 degrees, clamps and grabs the cylinder head for cleaning, and puts it to the discharge port after cleaning. At the same time, it grabs the upper cover in the temporary storage area for assembly. After the upper cover and cylinder head are assembled, they enter the subsequent workstation.

[0032] The expandable flexible cleaning fixture of the present application has the following advantages:

[0033] (1) The four processes of separating the upper cover and the cylinder head, cleaning the upper cover, cleaning the cylinder head, and assembling the upper cover and the cylinder head are all completed by a pair of cleaning fixtures. There is no need to add a code reading and writing device and a conveying tray, which reduces costs and eliminates the subsequent assembly process, streamlining the process and improving production efficiency.

[0034] (2) The positioning shaft and dual airbag deployment structure can realize the online separation of the upper cover and the cylinder head, and at the same time have the positioning function of the cleaning fixture.

[0035] (3) By staggering the clamping points of the clamping jaws, the clamping and cleaning functions of the upper cover and the cylinder head can be met at the same time.

[0036] (4) Replacing the electrical switch detection method with a pneumatically controlled valve + single-acting cylinder + proximity switch can effectively avoid the adverse effects of the water immersion environment on the detection switch and ensure the reliability of the detection.

[0037] (5) The positioning shaft, airbag, clamping plate positioning point, and detection machine control valve position can be adjusted or replaced according to different machine models, which can meet the flexible needs of co-production of multiple machine models.

[0038] Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various choices and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is limited by the claims and their equivalents.

Claims

1. An expandable flexible cleaning fixture, characterized in that: The invention comprises a robot connecting plate (1), one end of which is connected to the arm flange of the cleaning robot, and the other end is connected to a clamping claw mounting plate (2) via bolts; the end of the clamping claw mounting plate (2) away from the robot connecting plate (1) is fixedly connected to two air claws (5) via bolts; the side of the air claw (5) is provided with an upper pneumatic control valve (3) and a lower pneumatic control valve (11) for detecting the clamping state of the air claw (5); the air claw ( 5) A clamping jaw (6) and a mounting plate (9) are arranged at one end away from the clamping jaw mounting plate (2); the clamping jaw (6) is connected to the air gripper (5) by bolts; a shifting plate (4) is arranged on the side of the clamping jaw (6); the mounting plate (9) is connected to two positioning shafts (7) by a flange; three sections of air bags (8) are arranged at intervals on the positioning shaft (7); and an inflation joint (10) for inflating the air bag (8) is arranged near the flange on the positioning shaft (7).

2. The expandable flexible cleaning fixture according to claim 1, characterized in that: A long air hole is arranged at the center of the positioning shaft (7), and intersecting air holes are arranged at each airbag installation position. Compressed air at the inflation port enters the interior of the airbag (8) through the long air hole and the intersecting air holes, thereby causing the airbag (8) to expand and deform.

3. The expandable flexible cleaning fixture according to claim 1, characterized in that: The clamping jaw (6) is driven to move by the air gripper (5), and the shifting plate (4) can move along with the clamping jaw (6).

4. The expandable flexible cleaning fixture according to claim 1, characterized in that: The clamping jaws (6) are provided with a plurality of cylinder head clamping points (601) and a plurality of upper cover clamping points (602); the cylinder head clamping points (601) are in contact with the bottom surface of the cylinder head, and the upper cover clamping points (602) are in contact with the top surface of the upper cover, and both are guided and positioned by the positioning shaft (7) and the camshaft hole of the cylinder head or the upper cover.

5. The expandable flexible cleaning fixture according to claim 1, characterized in that: The shift plate (4), the upper pneumatic control valve (3) and the lower pneumatic control valve (11) are located on the same side, and the shift plate (4) is used to compress the lever rollers of the upper pneumatic control valve (3) and the lower pneumatic control valve (11).

6. The expandable flexible cleaning fixture according to claim 1, characterized in that: When the air gripper (5) drives the clamping jaw (6) to move and clamp the cylinder head, the shift plate (4) is used to compress the lever roller of the upper pneumatic motor-controlled valve (3), the air outlet of the motor-controlled valve is connected, the single-acting cylinder (12) connected to the upper pneumatic motor-controlled valve (3) is ventilated and extended, and the corresponding proximity switch (13) is triggered by a sensing signal, and the air gripper (5) is in a cylinder head clamping state.

7. The expandable flexible cleaning fixture according to claim 1, characterized in that: When the air gripper (5) drives the clamping jaw (6) to move and clamp the upper cover, the shift plate (4) is used to compress the lever rollers of the upper pneumatic motor-controlled valve (3) and the lower pneumatic motor-controlled valve (11) respectively, the air outlets of the two motor-controlled valves are connected, the two single-acting cylinders (12) are extended for ventilation, and the corresponding two proximity switches (13) sensing signals are triggered simultaneously, and the air gripper (5) is in a clamping state for the upper cover.

8. The expandable flexible cleaning fixture according to claim 1, characterized in that: The two air grippers (5) are symmetrically arranged.

9. The expandable flexible cleaning fixture according to claim 1, characterized in that: The airbag (8) is divided into three sections, which are respectively arranged at the front, middle and rear positions of the positioning shaft (7).

Images