Pneumatic pressurizing actuator for sander

Abstract

The utility model relates to the technical field of sanders, in particular to a pneumatic pressurizing actuator for a sander, which comprises an adsorption pressurizing module, a connecting fitting and a fixing part, the adsorption pressurizing module comprises a barrel and a cover, the barrel is inserted into an assembly hole arranged on the connecting fitting, an air cavity and a piston cavity arranged on the periphery of the air cavity are arranged in the barrel, and the cover is arranged in the air cavity. The air cavity is communicated with the cover body, a communicating hole used for communicating the piston cavity with the interior of the cover body is formed between the barrel body and the cover body, a lifting sleeve is arranged in the piston cavity, a pressurizing block is arranged on the lifting sleeve in the radial direction, and the pressurizing block extends to the outside through a window formed in the barrel body in the axial direction. Negative pressure is formed in the piston cavity and the cover body by exhausting air in the piston cavity and the cover body, so that after the lifting sleeve moves downwards, the pressurizing block pressurizes a connecting accessory downwards, and manual pressurizing is changed into pneumatic pressurizing when the sanding machine works.

Description

Technical Field

[0001] The utility model relates to the technical field of sanding machines, in particular to a pneumatic pressurized actuator for sanding machines. Background Art

[0002] A sanding machine is a mechanical device used to complete sanding work. Sanding is a synonym for polishing, which refers to the use of mechanical equipment to process some uneven, unevenly thick or non-conforming materials and objects into standard parts with smooth surfaces, uniform thickness, and meeting various process requirements. Therefore, sanding machines are widely used in many fields such as machinery and home improvement. The sanding machine mainly includes a motor, a transmission assembly, and a base plate assembly, among which the transmission assembly includes an eccentric part. In the working state, the transmission assembly transmits the rotational motion of the motor into the eccentric motion of the base plate. Sandpaper or other polishing parts are installed on the lower surface of the base plate, and the polishing parts move with the base plate to grind and polish the processed surface.

[0003] The existing problem with the existing sanding machine is that after placing sandpaper on the bottom plate assembly of the sanding machine and then placing it on the workpiece, it is necessary to manually apply a force perpendicular to the surface of the workpiece to the sanding machine after turning on the sanding machine, and the manual force applied to the sanding machine will also result in uneven force due to the operator's physical strength. Utility Model Content

[0004] The utility model aims to solve the above defects and provides a pneumatic pressurizing actuator for a sanding machine, so that manual pressurizing in the sanding machine can be changed into pneumatic pressurizing.

[0005] In order to overcome the defects existing in the background technology, the technical solution adopted by the utility model to solve its technical problems is: a pneumatic pressurized actuator for a sanding machine, comprising a fixing part and an adsorption pressurized module arranged on the sanding machine, a plurality of connecting accessories are arranged on the fixing part, the adsorption pressurized module comprises a cylinder and a cover body connected to the lower end of the cylinder, the cylinder is inserted into the assembly hole opened on the connecting accessory, an air cavity with open structures at both ends and a piston cavity with a fully closed structure are axially arranged in the cylinder, and the piston cavity is located at the periphery of the air cavity, and the air cavity is connected with the inside of the cover body, a conducting hole for conducting the piston cavity with the cover body is opened between the cylinder and the cover body, a lifting sleeve for piston movement is arranged in the piston cavity, and a pressurizing block for downward pressurizing the connecting accessory is radially arranged on the lifting sleeve, and the pressurizing block extends to the outside through the window axially opened on the cylinder.

[0006] A further improvement includes radially arranging a plurality of pressure blocks on the lifting sleeve.

[0007] A further improvement includes the air cavity being docked with a docking hole provided on the cover body.

[0008] A further improvement includes providing a return spring in the piston chamber to push the lifting sleeve upward.

[0009] A further improvement includes providing an elastic sealing portion at the open end of the cover body.

[0010] A further improvement includes a gap between the outer wall of the cylinder and the assembly hole.

[0011] The beneficial effect of the utility model is that in the design, air is evacuated in the piston cavity and the cover body to form a negative pressure in the piston cavity and the cover body, so that the lifting sleeve moves downward and then the pressure block pressurizes the connecting accessories downward, thereby realizing the change from manual pressurization to pneumatic pressurization when the sanding machine is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a top view of the utility model;

[0014] Figure 2 It is the front view of the utility model;

[0015] Figure 3 It is a longitudinal cross-sectional view of the adsorption and pressurization module in the utility model;

[0016] In the figure, 1-connecting accessories, 2-fixing parts, 3-adsorption and pressurizing module, 4-elastic sealing part, 5-conducting hole, 6-pressurizing block, 7-moving groove, 8-air cavity, 9-piston cavity, 10-lifting sleeve, 11-assembly hole, 12-reset spring, 13-cover body, 14-cylinder body, 15-docking hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The embodiments in the basic utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] according to Figure 1 , Figure 2 and Figure 3As shown, a pneumatic pressurizing actuator for a sanding machine comprises a fixing part 2 and an adsorption pressurizing module 3 arranged on the sanding machine, a plurality of connecting accessories 1 are arranged on the fixing part 2, the adsorption pressurizing module 3 comprises a cylinder 14 and a cover 13 connected to the lower end of the cylinder 14, the cylinder 14 is inserted into an assembly hole 11 opened on the connecting accessory 1, an air cavity 8 with open structures at both ends and a piston cavity 9 with a fully enclosed structure are axially arranged in the cylinder 14, and the piston cavity 9 is located at the periphery of the air cavity 8, and the air cavity 8 is communicated with the inside of the cover 13, and a hole for making the cylinder 14 and the cover 13 open is provided between the cylinder 14 and the cover 13. The piston cavity 9 is connected to a conducting hole 5 in the cover body 13, and a lifting sleeve 10 for piston movement is provided in the piston cavity 9, and a pressure block 6 for pressurizing the connecting accessory 1 downward is radially arranged on the lifting sleeve 10, and the pressure block 6 extends to the outside through a window 7 axially opened on the cylinder 14, so that when the lifting sleeve 10 performs piston movement, the pressure block 6 moves up and down in the window 7, and then presses the connecting accessory 1 downward through the pressure block 6, so that the sanding machine can be pressurized downward as a whole. Through this design, the sanding machine can be changed from manual pressurization to pneumatic pressurization during sanding, which saves the operator's physical strength and improves the sanding effect.

[0019] In order to improve the uniformity of pressurizing the connection fitting 1 , a plurality of pressurizing blocks 6 are radially arranged on the lifting sleeve 10 .

[0020] The air cavity 8 is butted against a butting hole 15 provided on the cover body 13 so that the air cavity 8 is in conduction with the inside of the cover body 13 .

[0021] A return spring 12 is provided in the piston chamber 9 to push the lifting sleeve 10 upward. When the piston chamber 9 is in a normal pressure state, the lifting sleeve 10 is lifted upward under the elastic force of the return spring 12 .

[0022] An elastic sealing portion 4 is provided at the open end of the cover body 13. When the sanding machine is working, the cover body 13 is attached to the surface of the workpiece, and a negative pressure is formed in the cover body 13 through an air pump to adsorb the workpiece. The elastic sealing portion 4 can effectively ensure the adsorption effect of the cover body 13 on the workpiece, and ensure that sufficient negative pressure is formed in the cover body 13 and the piston chamber 9 to press the pressure block 6 downward.

[0023] There is a gap between the outer wall of the cylinder 14 and the assembly hole 11 to prevent the sanding machine from driving the adsorption and pressurization module 3 to resonate when working, thereby ensuring the stability of the adsorption and pressurization module 3 when adsorbing the workpiece. The gap is between 1-2 mm.

[0024] Working principle: first fix the fixing part 2 on the outside of the output end of the sander, place the sander and the sander bottom plate on the workpiece to be polished, and at the same time, the cover body 13 is also attached to the workpiece, turn on the air pump, and the air pump is connected to the air cavity 8 of the cylinder 14 through a pipeline and evacuates the inside thereof, and a negative pressure is formed in the cover body 13 so that the cover body 13 is adsorbed on the workpiece. Due to the existence of the conducting hole 5, a negative pressure is also formed in the piston cavity 9, and the lifting sleeve 10 will move downward to compress the reset spring 12, and the lifting sleeve 10 drives the pressure block 6 to move downward together, so that the pressure block 6 presses the connecting accessory 1 downward, and the sander presses it downward while sanding. When the air pump inflates the cover body 13, the piston cavity 9 and the cover body 13 return to normal pressure, and the sander can be lifted to polish other areas of the workpiece. Repeat the above steps to continuously polish the workpiece.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pneumatic pressurized actuator for a sanding machine, characterized in that: The invention comprises a fixing part (2) and an adsorption and pressurizing module (3) arranged on a sanding machine, wherein a plurality of connecting accessories (1) are arranged on the fixing part (2), and the adsorption and pressurizing module (3) comprises a cylinder (14) and a cover (13) connected to the lower end of the cylinder (14), wherein the cylinder (14) is inserted into an assembly hole (11) provided on the connecting accessory (1), and an air cavity (8) with open structures at both ends and a piston cavity (9) with a fully enclosed structure are axially arranged in the cylinder (14), and the piston cavity (9) is located in the air cavity. The outer periphery of the cylinder (14) and the air cavity (8) is communicated with the interior of the cover (13); a conducting hole (5) is provided between the cylinder (14) and the cover (13) for conducting the piston cavity (9) with the interior of the cover (13); a lifting sleeve (10) for piston movement is provided in the piston cavity (9); a pressure block (6) for pressurizing the connecting accessory (1) downward is radially provided on the lifting sleeve (10); and the pressure block (6) extends to the outside through a window (7) axially provided on the cylinder (14).

2. A pneumatic pressurized actuator for a sanding machine as claimed in claim 1, characterized in that: A plurality of pressure blocks (6) are radially arranged on the lifting sleeve (10).

3. A pneumatic pressurized actuator for a sanding machine as claimed in claim 1, characterized in that: The air cavity (8) is butt-jointed with a butt-jointed hole (15) provided on the cover body (13).

4. A pneumatic pressurized actuator for a sanding machine as claimed in claim 1, characterized in that: A return spring (12) is provided in the piston chamber (9) for pushing the lifting sleeve (10) upwards.

5. A pneumatic pressurized actuator for a sanding machine as claimed in claim 1, characterized in that: An elastic sealing portion (4) is provided at the opening end of the cover body (13).

6. A pneumatic pressurized actuator for a sanding machine as claimed in claim 1, characterized in that: There is a gap between the outer wall of the cylinder (14) and the assembly hole (11).

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