A pneumatic polisher

Abstract

The utility model belongs to the pneumatic tool technical field, especially point to a kind of pneumatic polisher;Including shell, the polishing mechanism of setting in the front end of shell and the air inlet of setting in the rear end of shell, outlet, hinge seat is provided in the rear end of shell, the rear end of trigger, the front end of shroud are all hinged with hinge seat, and there is provided on the shroud the avoidance window for trigger to pass;The utility model shroud is closed, and the hand of operator forms support on shroud, reduces the fatigue feeling of long-time operation, improves the comfort of operation.The layout of avoidance window ensures that trigger operation is not disturbed, and the protection and operation flexibility are considered.Shroud is opened, and it is convenient to replace corresponding parts.

Description

Technical fields:

[0001] This utility model belongs to the field of pneumatic tool technology, and specifically refers to a pneumatic polishing machine. Background technology:

[0002] A pneumatic polishing machine is a polishing machine that uses compressed air as a power source to drive the impeller inside the polishing machine to rotate and achieve the purpose of polishing.

[0003] Chinese utility model patent (authorization announcement number CN 222244126U, application date 2024.05.08, announcement date 2024.12.27) discloses a pneumatic polishing machine with an assembled polishing disc structure, including an air valve and a pneumatic rotating shaft sleeve. A filter structure is installed on one side of the air valve, and a pressing plate is flipped and connected to one side of the top of the air valve. A switch button is provided on the other side of the top of the air valve, and a pneumatic rotating shaft sleeve is fixedly connected to the other side of the air valve. A transmission shaft housing is fixedly connected to the bottom end of the pneumatic rotating shaft sleeve. A lower cover is installed below the transmission shaft housing, and an auxiliary structure is installed at the bottom end of the lower cover. The auxiliary structure includes a sandpaper, a support plate, a limiting ring, a plug rod, a limiting groove, a first slot, a transmission gear plate, an adjusting thread, a second plug hole, an adjusting gear plate, a countersunk screw, a guide rail, and a clamping block. The sandpaper is installed below the lower cover.

[0004] The filter structure of the aforementioned pneumatic polishing machine is directly exposed. When workers operate it, their hands come into direct contact with the filter structure, resulting in poor comfort; or, to avoid contact with the filter structure, they need to lift their hands upwards with force, which can easily lead to fatigue during prolonged operation. Summary of the Invention:

[0005] The purpose of this invention is to provide a pneumatic polishing machine that can improve operating comfort and reduce work fatigue.

[0006] This utility model is implemented as follows:

[0007] A pneumatic polishing machine includes a housing, a polishing mechanism disposed at the front end of the housing, and an air inlet and an air outlet disposed at the rear end of the housing. A hinge seat is disposed at the rear end of the housing, and the rear end of the trigger and the front end of the protective cover are both hinged to the hinge seat. An obstacle window for the trigger to pass through is provided on the protective cover.

[0008] In the aforementioned pneumatic polishing machine, the protective cover is hinged to the hinge seat via a hinge, and a positioning seat is provided on the outer shell at the front end of the hinge seat; when the protective cover is opened, the front end of the protective cover abuts against the side wall of the positioning seat adjacent to the protective cover to form a limit, and the edge of the window located below the trigger can abut against the trigger to restrict the trigger from rotating downward.

[0009] In the aforementioned pneumatic polishing machine, the positioning seat includes a left positioning seat and a right positioning seat spaced apart. Guide grooves are provided on adjacent side walls of the left and right positioning seats. A limiting boss is provided at the front end of the protective cover. Protruding posts are provided on the left and right side walls of the limiting boss. When the protective cover is rotated downward to close, the protruding posts enter the guide grooves and move along the guide grooves.

[0010] In the aforementioned pneumatic polishing machine, the top of the left and right positioning seats is provided with an upper limit plate, and when the protective cover is closed, the limiting boss is positioned below the upper limit plate.

[0011] In the aforementioned pneumatic polishing machine, an air inlet connector is provided on the air inlet, and a silencer is provided on the air outlet. The protective cover includes a main cover body and two side plates located on both sides of the main cover body, forming an inverted U-shaped structure. When the protective cover is closed, the air inlet connector and the silencer are surrounded within the space formed by the protective cover.

[0012] In the aforementioned pneumatic polishing machine, the hinge seat includes a left hinge seat and a right hinge seat spaced apart. The hinge end of the trigger is provided with a mounting seat, and the mounting seat is provided with a hinge hole. The mounting seat, the left hinge seat, and the right hinge seat are connected by one or two pins to form a hinge structure.

[0013] In the aforementioned pneumatic polishing machine, the two reinforcing side plates of the mounting base are ribs, and the ribs abut against the edge of the clearance window located below the trigger.

[0014] The outstanding advantages of this utility model compared to the prior art are:

[0015] 1. When the protective cover is closed, the operator's hands are supported on the cover, reducing fatigue during long-term work and improving operating comfort. The layout that avoids the window ensures that trigger operation is not interfered with, balancing protection and operational flexibility. When the cover is open, it facilitates the replacement of corresponding parts.

[0016] 2. The front end of the protective cover of this utility model abuts against the side wall of the positioning seat adjacent to the protective cover, forming a stable mechanical limit to prevent the protective cover from being opened excessively, ensuring that the best angle is maintained when disassembling and assembling corresponding parts, improving the convenience of operation. In addition, the edge of the avoidance window located below the trigger can abut against the trigger, restricting the trigger from rotating downward, avoiding accidental start of the pneumatic polisher due to accidental contact, eliminating safety hazards, and is especially suitable for non-working states when maintaining or replacing parts. Attached image description:

[0017] Figure 1 This is a three-dimensional schematic diagram of the protective cover of this utility model in the closed state;

[0018] Figure 2This is a top view of the protective cover of this utility model in the closed state;

[0019] Figure 3 yes Figure 2 AA section view;

[0020] Figure 4 yes Figure 3 A magnified view of a portion of the image;

[0021] Figure 5 This is one of the three-dimensional schematic diagrams of the protective cover of this utility model in the open state;

[0022] Figure 6 This is the second three-dimensional schematic diagram of the protective cover of this utility model in the open state;

[0023] Figure 7 This is a top view of the protective cover of this utility model in the open state;

[0024] Figure 8 yes Figure 7 BB cross-sectional view;

[0025] Figure 9 yes Figure 8 A magnified view of a portion of the image;

[0026] Figure 10 This is a schematic diagram of the protective cover and trigger of this utility model without installation;

[0027] Figure 11 This is a schematic diagram of the protective cover of this utility model;

[0028] Figure 12 This is a schematic diagram of the trigger of this utility model.

[0029] In the diagram: 1. Outer shell; 2. Air intake connector; 3. Muffler; 4. Trigger; 5. Protective cover; 6. Clearance window; 7. Hinge; 8. Left positioning seat; 9. Right positioning seat; 10. Guide groove; 11. Limiting boss; 12. Protruding post; 13. Upper limit plate; 14. Main cover; 15. Side plate; 16. Left hinge seat; 17. Right hinge seat; 18. Mounting base; 19. Hinge hole; 20. Rib plate. Detailed implementation method:

[0030] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —12:

[0031] This utility model provides a pneumatic polishing machine, which includes a housing 1, a polishing mechanism disposed at the front end of the housing 1, and an air inlet and an air outlet disposed at the rear end of the housing 1. An air inlet connector 2 is disposed at the air inlet, and a silencer 3 is disposed at the air outlet. A hinge seat is disposed at the rear end of the housing 1. The rear end of the trigger 4 and the front end of the protective cover 5 are both hinged to the hinge seat, and an avoidance window 6 is disposed on the protective cover 5 for the trigger 4 to pass through.

[0032] This invention features a hinged cover 5 on the outer casing 1. When the cover 5 is open, it facilitates the installation and removal of the air intake connector 2 or the muffler 3. When the cover 5 is closed, it provides support for the operator's hands, reducing fatigue during long hours of work and improving operational comfort. The layout of the clearance window 6 ensures that the trigger 4 is not disturbed, balancing protection and operational flexibility.

[0033] To further optimize the structure, the protective cover 5 of this utility model is hinged to the hinge seat via a hinge 7. Specifically, one end of the hinge 7 is hinged to the hinge seat, and the other end is hinged to the protective cover 5. A positioning seat is provided on the outer shell 1 at the front end of the hinge seat. When the protective cover 5 is opened, the front end of the protective cover 5 abuts against the side wall of the positioning seat adjacent to the protective cover 5, forming a stable mechanical limit to prevent the protective cover 5 from being opened excessively. This ensures that the optimal angle is maintained when disassembling or assembling the air inlet connector 2 or the muffler 3, improving operational convenience. Furthermore, the edge of the clearance window 6 located below the trigger 4 can abut against the trigger 4, restricting the downward rotation of the trigger 4 and preventing accidental start-up of the pneumatic polisher due to accidental contact, thus eliminating safety hazards. This is especially suitable for non-working states during maintenance or component replacement.

[0034] Furthermore, the positioning base includes a left positioning base 8 and a right positioning base 9 spaced apart. Guide grooves 10 are provided on adjacent side walls of the left positioning base 8 and the right positioning base 9. A limiting boss 11 is provided at the front end of the protective cover 5. Protruding posts 12 are provided on the left and right side walls of the limiting boss 11. When the protective cover 5 rotates downward to close, the protruding posts 12 enter the guide grooves 10 and move along the guide grooves 10, ensuring the stability of the movement trajectory of the protective cover. It can also prevent the protective cover 5 from detaching from the positioning base during the closing process, thereby improving the structural reliability.

[0035] Furthermore, this invention also provides an upper limit plate 13 at the top of the left positioning seat 8 and the right positioning seat 9. When the protective cover 5 is closed, the limiting boss 11 forms a rigid stop below the upper limit plate 13, completely preventing the front end of the protective cover 5 from tilting upwards, thus avoiding hand pressure (such as gripping, pressing down, etc.) during operation that could cause the protective cover to loosen or open accidentally. In high-intensity polishing operations, equipment vibration or external impact can easily cause ordinary hinged structures to loosen, while this design ensures that the protective cover is always tightly closed, improving structural reliability.

[0036] In this embodiment, the protective cover 5 includes a main cover body 14 and two side plates 15 located on both sides of the main cover body 14, forming an inverted U-shaped structure. When the protective cover 5 is closed, the air intake connector 2 and the muffler 3 are surrounded within the space formed by the protective cover 5. Hiding the air intake connector 2 and the muffler 3 enhances the overall aesthetics and industrial design quality of the polishing machine. Simultaneously, the semi-enclosed structure of the protective cover 5 effectively prevents dust and metal debris splashed during polishing from entering the air intake connector and the muffler, reducing the risk of blockage or corrosion.

[0037] It should be noted that the hinge seat includes a left hinge seat 16 and a right hinge seat 17 spaced apart. The rear end of the trigger 4 is provided with a mounting seat 18. The mounting seat 18 is provided with a hinge hole 19 and is located between the left hinge seat 16 and the right hinge seat 17. The mounting seat 18, the left hinge seat 16, and the right hinge seat 17 are connected by one or two pins to form a hinge structure.

[0038] Generally, to facilitate the reset of trigger 4, a torsion spring can be fitted onto the pin.

[0039] The mounting base 18 of this invention has two reinforcing plates on both sides, which are ribs 20. The ribs 20 abut against the edge of the clearance window 6 located below the trigger 4. As a reinforcing structure of the mounting base 18, the ribs 20 can not only improve the overall rigidity of the trigger 4, but also change the limiting angle between the trigger 4 and the guard 5.

[0040] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A pneumatic polishing machine, comprising a housing (1), a polishing mechanism disposed at the front end of the housing (1), and an air inlet and an air outlet disposed at the rear end of the housing (1), characterized in that: A hinge seat is provided at the rear end of the outer shell (1). The rear end of the trigger (4) and the front end of the cover (5) are both hinged to the hinge seat. A clearance window (6) is provided on the cover (5) for the trigger (4) to pass through.

2. The pneumatic polishing machine according to claim 1, characterized in that: The protective cover (5) is hinged to the hinge seat via a hinge (7), and a positioning seat is provided on the outer shell (1) at the front end of the hinge seat; when the protective cover (5) is opened, the front end of the protective cover (5) abuts against the side wall of the positioning seat adjacent to the protective cover (5) to form a limit, and the edge of the window located below the trigger (4) can abut against the trigger (4) to restrict the trigger (4) from rotating downward.

3. A pneumatic polishing machine according to claim 2, characterized in that: The positioning seats include a left positioning seat (8) and a right positioning seat (9) spaced apart. Guide grooves (10) are provided on adjacent side walls of the left positioning seat (8) and the right positioning seat (9). A limiting boss (11) is provided at the front end of the protective cover (5). Protruding posts (12) are provided on the left and right side walls of the limiting boss (11). When the protective cover (5) is rotated downward to close, the protruding posts (12) enter the guide groove (10) and move along the guide groove (10).

4. A pneumatic polishing machine according to claim 3, characterized in that: The top of the left positioning seat (8) and the right positioning seat (9) are provided with an upper limit plate (13). When the cover (5) is closed, the limiting boss (11) is limited below the upper limit plate (13).

5. A pneumatic polishing machine according to claim 1 or 2, characterized in that: An air inlet connector (2) is provided on the air inlet, and a silencer (3) is provided on the air outlet. The protective cover (5) includes a main cover body (14) and two side plates (15) located on both sides of the main cover body (14) forming an inverted U-shaped structure. When the protective cover (5) is closed, the air inlet connector (2) and the silencer (3) are surrounded in the space formed by the protective cover (5).

6. A pneumatic polishing machine according to claim 1 or 2, characterized in that: The hinge base includes a left hinge base (16) and a right hinge base (17) spaced apart. The hinge end of the trigger (4) is provided with a mounting base (18). The mounting base (18) is provided with a hinge hole (19). The mounting base (18), the left hinge base (16), and the right hinge base (17) form a hinge structure through one or two pins.

7. A pneumatic polishing machine according to claim 6, characterized in that: The two reinforcing side plates of the mounting base (18) are ribs (20), and the ribs (20) abut against the edge of the clearance window (6) located below the trigger (4).

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