A cylinder body for a pneumatic sander

Abstract

This utility model relates to the field of pneumatic sander technology, specifically to a cylinder body for a pneumatic sander. During actual assembly, the cylinder body is positioned by an upper cover positioning pin engaging with the upper cover positioning groove, and simultaneously by an upper cover limiting groove engaging with the upper cover protruding ring structure. Similarly, the cylinder body is positioned by a lower cover positioning pin engaging with the lower cover positioning groove, and simultaneously by a lower cover limiting groove engaging with the lower cover protruding ring structure. This effectively improves the positioning accuracy between the cylinder body and the upper and lower covers, avoiding structural misalignment during assembly and use. It also improves the relative sealing effect of the upper and lower covers, preventing excessive gas leakage and increasing compressed air utilization efficiency. This, in turn, enhances the overall working efficiency and processing quality of the pneumatic sander, while reducing wear and tear.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic sander technology, specifically to a cylinder body for a pneumatic sander. Background Technology

[0002] The cylinder in a pneumatic sander is its core power component, responsible for converting the energy of compressed air into rotational mechanical motion to drive the sandpaper in a rotating sanding operation. The cylinder mainly includes a cylinder body, upper cover, lower cover, rotor shaft, blades, upper bearing, and lower bearing. Typically, the cylinder body and upper cover, as well as the cylinder body and lower cover, are relatively sealed by upper and lower locking springs on the rotor shaft, preventing compressed air from easily leaking between the cylinder body and upper cover, and between the cylinder body and lower cover. However, when the cylinder of an existing pneumatic sander is subjected to external impact or vibration, the joint of the upper and lower covers is prone to displacement, and the relatively sealed structure is not perfect, which easily leads to more gas leakage problems. This not only causes continuous loss of compressed air, but also directly reduces the output power of the cylinder, making it impossible for the pneumatic sander to maintain stable working performance, resulting in decreased processing quality and increased energy consumption. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a cylinder body for a pneumatic sander.

[0004] The purpose of this utility model is achieved through the following technical solution: a cylinder body for a pneumatic sander, including a cylinder body, the cylinder body having an eccentric working chamber, an upper cover positioning pin fixedly provided on the top surface of the cylinder body, a lower cover positioning pin fixedly provided on the bottom surface of the cylinder body, an upper cover limiting groove circumferentially provided on the outer periphery of the top surface of the cylinder body, and a lower cover limiting groove circumferentially provided on the outer periphery of the bottom surface of the cylinder body.

[0005] Preferably, the side wall of the cylinder is provided with an air inlet and an air outlet that are both connected to the eccentric working chamber.

[0006] Preferably, the top surface of the cylinder body is provided with an upper cover air guide hole that communicates with the air intake hole, and the bottom surface of the cylinder body is provided with a lower cover air guide hole that communicates with the air intake hole.

[0007] Preferably, the air outlet is elongated.

[0008] Preferably, the number of air outlet holes is at least two, and adjacent air outlet holes are spaced apart.

[0009] Preferably, the inner wall of the cylinder is provided with an oil groove for the natural outflow of lubricating oil.

[0010] Preferably, the oil tank is elongated.

[0011] The beneficial effects of this utility model are as follows: The cylinder body of the pneumatic sander of this utility model adopts a cylinder body with an eccentric working chamber. An upper cover positioning pin is fixedly installed on the top surface of the cylinder body, and a lower cover positioning pin is fixedly installed on the bottom surface of the cylinder body. An upper cover limiting groove is circumferentially opened on the outer periphery of the top surface of the cylinder body, and a lower cover limiting groove is circumferentially opened on the outer periphery of the bottom surface of the cylinder body. During actual assembly, the upper and lower covers themselves meet the following conditions: the outer periphery of the upper cover has an upper cover convex ring structure that limits and cooperates with the upper cover limiting groove; the upper cover has an upper cover positioning groove that cooperates with the upper cover positioning pin; the outer periphery of the lower cover has a lower cover convex ring structure that limits and cooperates with the lower cover limiting groove; and the lower cover has a lower cover positioning groove that cooperates with the lower cover positioning pin. Based on this, during assembly, the cylinder body is positioned and installed by the upper cover positioning pin engaging with the upper cover positioning groove, and simultaneously by the upper cover limiting groove engaging with the upper cover convex ring structure. The cylinder body is positioned and installed by the lower cover positioning pin engaging with the lower cover positioning groove, and simultaneously by the lower cover limiting groove engaging with the lower cover convex ring structure. This completes the assembly of the cylinder body with the upper and lower covers, effectively improving the positioning accuracy between the cylinder body and the upper and lower covers, avoiding structural offsets during assembly and use, improving the relative sealing effect of the upper and lower covers, avoiding problems such as excessive gas leakage, and improving the utilization efficiency of compressed air. This, in turn, improves the overall working efficiency and processing quality of the pneumatic sander and reduces wear and tear. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a top-view schematic diagram of the present invention; The attached diagram is labeled as follows: 1. Cylinder block; 2. Eccentric working chamber; 3. Upper cover positioning pin; 4. Lower cover positioning pin; 5. Upper cover limiting groove; 6. Lower cover limiting groove; 7. Air inlet hole; 8. Air outlet hole; 9. Upper cover air guide hole; 10. Lower cover air guide hole; 11. Oil groove. Detailed Implementation

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0014] like Figure 1-3As shown, a cylinder body of a pneumatic sander includes a cylinder body 1, an eccentric working chamber 2, an upper cover positioning pin 3 fixedly disposed on the top surface of the cylinder body 1, a lower cover positioning pin 4 fixedly disposed on the bottom surface of the cylinder body 1, an upper cover limiting groove 5 circumferentially disposed on the outer periphery of the top surface of the cylinder body 1, and a lower cover limiting groove 6 circumferentially disposed on the outer periphery of the bottom surface of the cylinder body 1.

[0015] When the cylinder body is actually assembled, the upper cover and the lower cover themselves meet the following conditions: the outer periphery of the upper cover has an upper cover convex ring structure that is limited and matched with the upper cover limiting groove 5, and the upper cover has an upper cover positioning groove that is positioned and matched with the upper cover positioning pin 3; the outer periphery of the lower cover has a lower cover convex ring structure that is limited and matched with the lower cover limiting groove 6, and the lower cover has a lower cover positioning groove that is positioned and matched with the lower cover positioning pin 4. Based on this, during assembly, the cylinder body 1 is positioned and installed by the upper cover positioning pin 3 engaging with the upper cover positioning groove, and simultaneously by the upper cover limiting groove 5 engaging with the upper cover convex ring structure. The cylinder body 1 is positioned and installed by the lower cover positioning pin 4 engaging with the lower cover positioning groove, and simultaneously by the lower cover limiting groove 6 engaging with the lower cover convex ring structure. This completes the assembly of the cylinder body with the upper and lower covers, effectively improving the positioning accuracy between the cylinder body and the upper and lower covers, avoiding structural offsets during assembly and use, improving the relative sealing effect of the upper and lower covers, avoiding excessive gas leakage, and improving the efficiency of compressed air utilization. This, in turn, improves the overall working efficiency and processing quality of the pneumatic sander and reduces wear and tear.

[0016] Furthermore, the side wall of the cylinder 1 is provided with an air inlet 7 and an air outlet 8 that are both connected to the eccentric working chamber 2.

[0017] Furthermore, the top surface of the cylinder body 1 is provided with an upper cover air guide hole 9 that connects to the air intake hole 7, and the bottom surface of the cylinder body 1 is provided with a lower cover air guide hole 10 that connects to the air intake hole 7. During actual assembly, the upper and lower covers of the cylinder body also meet the following conditions: the bottom surface of the upper cover has an upper cover guide groove that connects to the upper cover air guide hole 9, and the top surface of the lower cover has a lower cover guide groove that connects to the lower cover air guide hole 10. Both the upper and lower cover guide grooves are used to assist in guiding air so that the gas can drive the blades inside the cylinder to rotate the rotor. The air intake hole 7 connects the upper cover air guide hole 9 and the lower cover air guide hole 10 vertically, which is beneficial for promoting the rotation of the blades and the rotor.

[0018] Furthermore, the air outlet 8 is elongated in shape, which is more conducive to the discharge of compressed air.

[0019] Furthermore, the number of air outlet holes 8 is at least two, and adjacent air outlet holes 8 are spaced apart, which is more conducive to the discharge of compressed air.

[0020] Furthermore, the inner wall of the cylinder 1 is provided with an oil groove 11 for the natural outflow of lubricating oil. When the pneumatic sander is in use, the cylinder 1 is lubricated by lubricating oil to prevent easy wear of the cylinder 1 and the rotor. When it is necessary to add lubricating oil, the cylinder 1 is disassembled, lubricating oil is dripped into the oil groove 11, and the lubricating oil is allowed to flow out naturally from the inner wall of the cylinder 1. After reassembly and operation, the rotation of the rotor can disperse the lubricating oil in the cylinder 1 to prevent easy wear of the cylinder 1 and the rotor.

[0021] Furthermore, the oil groove 11 is elongated in shape so that when the lubricating oil flows out naturally from the inner wall of the cylinder 1, it covers more of the inner wall area.

[0022] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A pneumatic cylinder body of a pneumatic sanding machine, comprising a cylinder body, the cylinder body being provided with an eccentric working cavity, characterized in that: The top surface of the cylinder is fixedly provided with an upper cover positioning pin, the bottom surface of the cylinder is fixedly provided with a lower cover positioning pin, the outer periphery of the top surface of the cylinder is provided with an upper cover limiting groove, and the outer periphery of the bottom surface of the cylinder is provided with a lower cover limiting groove.

2. A pneumatic cylinder body for a pneumatic sander as defined in claim 1, characterized in that The side wall of the cylinder is provided with an air inlet and an air outlet that are both connected to the eccentric working chamber.

3. A pneumatic cylinder body for a pneumatic sander as defined in claim 2, characterized in that: The top surface of the cylinder body is provided with an upper cover air guide hole that connects to the air intake hole, and the bottom surface of the cylinder body is provided with a lower cover air guide hole that connects to the air intake hole.

4. The pneumatic cylinder body of claim 2, wherein: The air outlet is elongated in shape.

5. The pneumatic cylinder body of claim 2, wherein: The number of air outlet holes is at least two, and adjacent air outlet holes are spaced apart.

6. The pneumatic cylinder body of claim 1, wherein: The inner wall of the cylinder is provided with an oil groove for the natural flow of lubricating oil.

7. A pneumatic cylinder body for a pneumatic sander as defined in claim 6, characterized in that The oil tank is elongated in shape.

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