Gasoline chain saw

Abstract

The utility model discloses a gasoline chain saw which comprises a machine body, the machine body is connected with an air filter, an air filter outer cover is arranged on the machine body, and the air filter outer cover covers the air filter. The air filter outer cover is connected with a knob, the knob is provided with a pin shaft, the pin shaft is provided with a stop part, the air filter outer cover is provided with a mounting hole for the stop part to pass through, the air filter is provided with a containing cavity for containing the stop part, and an opening of the containing cavity is matched with the stop part; the pin shaft sequentially penetrates through the mounting hole and the opening to enable the stop part to enter the accommodating cavity, and the knob is rotated to enable the stop part and the opening to be staggered to limit the stop part to freely separate from the accommodating cavity, so that the knob prevents the air filter outer cover from freely separating from the machine body. The air filter outer cover is novel in structure, easy to disassemble and assemble, convenient to overhaul the air filter, capable of replacing a screw fixing mode, free of tools for disassembly and assembly, free of the problem that the air filter outer cover cannot be effectively fixed due to thread slipping, labor-saving and convenient to operate.

Description

Technical Field

[0001] This utility model belongs to the field of chainsaw technology, and in particular relates to a gasoline chainsaw. Background Technology

[0002] The intake system of a gasoline chainsaw includes an air filter and a carburetor. The air filter removes particulate impurities from the intake air, preventing these impurities from causing wear on the cylinders. The air filter needs to be cleaned after prolonged use to prevent clogging.

[0003] Existing gasoline chainsaws use screws to fasten the air filter cover to the machine body, which has problems such as cumbersome assembly, high precision requirements, and labor-intensive inconvenience. Especially in field operations, disassembly and assembly are even more inconvenient, and repeated disassembly and assembly can cause the air filter cover to fail to be effectively fixed due to stripped threads. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned technical problems existing in the prior art and to provide a gasoline chainsaw with a novel structure. The air filter cover is easy to disassemble and assemble, which facilitates the maintenance of the air filter. It replaces the screw fixing method, and does not require tools for disassembly and assembly. It will not have the problem of ineffective fixing due to stripped threads, and the operation is labor-saving and convenient.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A gasoline chainsaw includes: a body, an air filter connected to the body, and an air filter cover on the body, the air filter cover enclosing the air filter; characterized in that: a knob is connected to the air filter cover, the knob has a pin, the pin has a stop part, the air filter cover has a mounting hole for the stop part to pass through, and the air filter has a receiving cavity for accommodating the stop part, the opening of the receiving cavity being adapted to the stop part; the pin passes through the mounting hole and the opening in sequence, allowing the stop part to enter the receiving cavity; rotating the knob causes the stop part to be misaligned with the opening, restricting the stop part from freely detaching from the receiving cavity, thus preventing the air filter cover from freely detaching from the body. This chainsaw has a novel structure, the air filter cover is easy to disassemble and assemble, facilitating air filter maintenance, replacing the screw fixing method, eliminating the need for tools for disassembly and assembly, and avoiding the problem of ineffective fixing due to stripped threads, making operation labor-saving and convenient.

[0007] Furthermore, the mounting hole is a countersunk hole, and the outer peripheral wall of the pin is provided with an elastic part. The elastic part passes through the small diameter hole of the countersunk hole and then enters the large diameter hole of the countersunk hole. The small diameter hole of the countersunk hole prevents the elastic part from moving axially. During the installation of the knob, the elastic part comes into contact with the wall of the small diameter hole of the countersunk hole. The elastic part is compressed and bends inward. When the elastic part passes through the small diameter hole of the countersunk hole, the elastic part returns to its original shape. It is blocked by the small diameter hole of the countersunk hole and cannot move axially, thus preventing the knob from loosening and falling off, resulting in high installation reliability.

[0008] Furthermore, one end of the elastic part is connected to the pin, and the other end of the elastic part is bent outward. The outer peripheral wall of the pin is provided with a relief groove corresponding to the elastic part, and the inner wall of the countersunk hole is provided with a guide part. The side of the guide part is provided with a guide surface corresponding to the elastic part. When the knob is installed, the guide part acts as a radial block against the elastic part, thereby preventing the pin from rotating freely in the axial direction and improving the installation stability of the knob. When disassembling the knob, rotate the knob in the opposite direction. The elastic part comes into contact with the guide surface, causing the bent end of the elastic part to deform inward. When the elastic part comes into contact with the guide part, the knob can be pulled outward, and then the air filter cover can be removed.

[0009] Furthermore, the bottom of the machine body is equipped with a wear-resistant base plate, which replaces the wear on the bottom of the machine body to prevent severe wear on the bottom of the machine body during use, thereby extending the service life of the machine body.

[0010] Furthermore, the machine body is fixedly connected to the wear-resistant base plate with screws, ensuring reliable fixation, convenient assembly and disassembly, and easy installation and replacement.

[0011] Furthermore, the wear-resistant base plate is secured to the rear handle base of the machine body through a bend, which improves the installation strength of the wear-resistant base plate, making it less prone to loosening and unable to detach from the machine body, ensuring stable and reliable installation.

[0012] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0013] The air filter cover is easy to install and remove, making it convenient for air filter maintenance. It replaces the screw fixing method, eliminating the need for tools and avoiding the problem of stripped threads preventing effective fixing. It is labor-saving and convenient to operate.

[0014] When installing the knob, first pass the stop through the countersunk hole. Then, the elastic part abuts against the guide part. The elastic part is squeezed by the guide part and bends inward until it retracts into the relief groove. After the stop enters the receiving cavity from the opening, rotate the knob to displace the stop from the opening. The stop cannot freely exit the receiving cavity from the opening and is confined within the receiving cavity. At this time, the elastic part separates from the guide part, and the elastic part returns to its original shape. The elastic part is blocked by the small diameter hole of the countersunk hole and cannot move axially. Furthermore, the elastic part is blocked by the guide part and cannot move axially. The knob's radial movement is blocked, while both axial and radial movements are restricted, thus limiting the free movement of the pin and achieving a fixed position. This ensures high stability and effectively prevents the knob from loosening and falling off, guaranteeing the reliability of the knob's installation. The knob also prevents the air filter cover from detaching freely from the machine body, thereby ensuring the reliability of the air filter cover's installation. When disassembling the knob, rotating it in the opposite direction causes the elastic part to come into contact with the guide surface, deforming the bent end of the elastic part inward. When the elastic part comes into contact with the guide part, the knob can be pulled outward, and then the air filter cover can be removed. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the structure of a gasoline chainsaw according to the present invention;

[0017] Figure 2 This is a schematic diagram of the connection between the body and the wear-resistant base plate in this utility model;

[0018] Figure 3 This is a schematic diagram of the hollow filter and knob connection of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the hollow filter outer cover of this utility model;

[0020] Figure 5 This is a schematic diagram of the countersunk hole structure in this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the lower seat in this utility model;

[0022] Figure 7 This is a schematic diagram of the knob in this utility model.

[0023] In the diagram: 1-body; 2-air filter; 3-air filter cover; 4-wear-resistant base plate; 5-bending part; 6-rear handle base; 7-knob; 8-pin; 9-elastic part; 10-avoiding groove; 11-stop part; 12-countersunk hole; 13-guide part; 14-guide surface; 15-accommodating cavity; 16-lower seat; 17-opening; 18-column head. Detailed Implementation

[0024] like Figures 1 to 7 As shown, this utility model relates to a gasoline chainsaw, which includes: a body 1, an air filter 2 connected to the body 1, and an air filter cover 3 on the body 1, which covers the air filter 2 and provides protection for the air filter 2.

[0025] The bottom of the machine body 1 is connected to a wear-resistant base plate 4 by screws, which is reliable, easy to disassemble and assemble, and easy to replace. The wear-resistant base plate 4 can be made of steel plate, which has reliable strength. The wear-resistant base plate 4 replaces the bottom wear of the machine body 1, preventing severe wear on the bottom of the machine body 1 during use, thereby extending the service life of the machine body 1.

[0026] The wear-resistant base plate 4 is secured to the rear handle base 6 of the body 1 by the bending part 5, which improves the installation strength of the wear-resistant base plate 4, making it less prone to loosening and unable to detach from the body 1, thus ensuring stable and reliable installation.

[0027] A knob 7, which may be made of plastic, is connected to the air filter housing 3. The knob 7 has a pin 8, and the outer peripheral wall of the pin 8 has an elastic part 9 and a clearance groove 10. The clearance groove 10 corresponds to the elastic part 9. One end of the elastic part 9 is connected to the pin 8, and the other end of the elastic part 9 is bent outwards. One end of the pin 8 has a column head 18, the cross-sectional diameter of which is smaller than that of the pin 8. The column head 18 has a stop part 11. The cover 3 has a mounting hole for the stop part 11 to pass through. The mounting hole is a countersunk hole 12. A guide part 13 protrudes from the inner wall of the countersunk hole 12. A guide surface 14 corresponding to the elastic part 9 is provided on the side of the guide part 13, which guides the elastic part 9 to deform and abut against the guide part 13. The guide surface 14 is an inclined surface or an arc surface. The lower seat 16 of the air filter 2 is provided with a receiving cavity 15 to accommodate the stop part 11. The opening 17 of the receiving cavity 15 is adapted to the stop part 11.

[0028] The air filter cover 3 is easy to disassemble and assemble, making it convenient to inspect the air filter 2. It replaces the screw fixing method, eliminating the need for tools for disassembly and assembly, and avoiding the problem of ineffective fixing due to stripped threads. The operation is labor-saving and convenient.

[0029] When installing knob 7, first pass the stop part 11 through the countersunk hole 12, then the elastic part 9 abuts against the guide part 13. The elastic part 9 is squeezed by the guide part 13 and bends inward until it retracts into the relief groove 10. After the stop part 11 enters the receiving cavity 15 from the opening 17, rotate knob 7 to displace the stop part 11 from the opening 17. The stop part 11 cannot freely exit the receiving cavity 15 from the opening 17 and is confined within the receiving cavity 15. At this time, the elastic part 9 separates from the guide part 13, and the elastic part 9 returns to its original shape. The elastic part 9 is blocked by the small diameter hole of the countersunk hole 12 and cannot move axially. The elastic part 9 is also affected by... The knob 7 is blocked by the guide part 13 and cannot move radially. Both the axial and radial directions are blocked, thus restricting the free movement of the pin 8 and achieving the limit fixation of the knob 7. It has high stability and effectively prevents the knob 7 from loosening and falling off, ensuring the installation reliability of the knob 7. The knob 7 prevents the air filter cover 3 from freely detaching from the body 1, thereby ensuring the installation reliability of the air filter cover 3. When disassembling the knob 7, the knob 7 is rotated in the opposite direction. The elastic part 9 abuts against the guide surface 14, causing the bent end of the elastic part 9 to deform inward. When the elastic part 9 abuts against the guide part 13, the knob 7 can be pulled outward, and then the air filter cover 3 can be removed.

[0030] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A gasoline chainsaw, comprising: The machine body is connected to an air filter, and an air filter cover is provided on the machine body to cover the air filter. Its features are: A knob is connected to the air filter cover. The knob has a pin, and the pin has a stop. The air filter cover has a mounting hole for the stop to pass through. The air filter has a receiving cavity to accommodate the stop, and the opening of the receiving cavity is adapted to the stop. The pin passes through the mounting hole and the opening in sequence, so that the stop enters the receiving cavity. Rotating the knob causes the stop to be misaligned with the opening, restricting the stop from freely leaving the receiving cavity, so that the knob prevents the air filter cover from freely detaching from the machine body.

2. A gasoline chainsaw according to claim 1, characterized in that: The mounting hole is a countersunk hole, and the outer peripheral wall of the pin is provided with an elastic part. The elastic part passes through the small diameter hole of the countersunk hole and enters the large diameter hole of the countersunk hole. The small diameter hole of the countersunk hole blocks the axial movement of the elastic part.

3. A gasoline chainsaw according to claim 2, characterized in that: One end of the elastic part is connected to the pin, and the other end of the elastic part is bent outward. The outer peripheral wall of the pin is provided with a relief groove corresponding to the elastic part. The inner wall of the countersunk hole is provided with a guide part, and the side of the guide part is provided with a guide surface corresponding to the elastic part.

4. A gasoline chainsaw according to claim 1, characterized in that: The bottom of the machine body is equipped with a wear-resistant base plate.

5. A gasoline chainsaw according to claim 4, characterized in that: The body is fixedly connected to the wear-resistant base plate by screws.

6. A gasoline chainsaw according to claim 4, characterized in that: The wear-resistant base plate is secured to the rear handle base of the machine body via a bend.

Images