Anti-blocking structure of chain saw oil outlet and chain saw

Abstract

The anti-blocking structure of the chain saw oil outlet comprises a shell and a guide plate used for installing a saw chain, the guide plate is installed on one side of the shell, the shell is provided with the oil outlet, the guide plate is provided with a conveying hole communicated with the oil outlet, and lubricating oil is conveyed to the conveying hole through the oil outlet to lubricate the saw chain. An embedding groove is formed in the side, opposite to the guide plate, of the shell, the oil outlet is formed in the embedding groove, an elastic sealing piece is fixedly inserted into the embedding groove, an oil guide hole is formed in the elastic sealing piece, one end of the oil guide hole is in butt joint with the oil outlet, the other end of the oil guide hole is communicated with the conveying hole, a filter screen is arranged between the oil guide hole and the oil outlet, and the filter screen covers the oil outlet. The filter screen covers the oil outlet, fine wood chips can be prevented from entering the oil outlet, and when the wood chips are accumulated on the filter screen to block the oil outlet, only the elastic sealing piece needs to be taken out of the caulking groove, and the filter screen is cleaned or replaced.

Description

Technical Field

[0001] The utility model relates to a chain saw, in particular to an anti-blocking structure of an oil outlet of a chain saw and the chain saw. Background Art

[0002] A chain saw is a tool that drives the cutting teeth on the saw chain to produce movement to cut trees, stones, etc. When the electric chain saw is in use, an oil pump needs to be used to continuously spray oil on the chain and other parts of the electric chain saw to reduce the working temperature and improve the sawing efficiency.

[0003] For example, Chinese utility model patent CN210999136U discloses a turbine-driven electric chain saw, which includes a machine body, an electric saw fixed on the machine body, a sprocket, a guide plate, and a chain wound around the sprocket and the guide plate, the chain being rotatably mounted between the sprocket and the guide plate, a transmission worm engaged with an output shaft of a motor being provided in the machine body, the transmission worm being passed through the sprocket, an oil pump being provided below the transmission worm, the oil pump including a driving turbine engaged with the transmission worm, an oil inlet, and an oil outlet, an oil cylinder connected to the oil inlet being provided on one side of the oil pump, an oil inlet pipe being provided between the oil cylinder and the oil pump, the lubricant in the oil cylinder being transported to the oil pump through the oil inlet pipe, an oil outlet pipe being installed on the oil outlet, a delivery hole close to the chain being provided on the casing, one end of the oil outlet pipe being connected to the delivery hole, and the lubricant being transported to the chain portion located at the delivery hole through the oil outlet pipe.

[0004] Another example is an oil replenishing structure and a chain saw disclosed in Chinese utility model patent CN217802159U, comprising a housing; a guide plate mounted on the housing, a saw chain arranged circumferentially on the guide plate, and the saw chain can rotate circumferentially around the guide plate; and an oil tank arranged on the housing, the oil tank being provided with an oil replenishing structure, the oil replenishing structure comprising: an oil replenishing pipeline connected between an oil outlet of an oil pump and an oil groove hole of the guide plate, an oil groove being arranged on a side of the housing opposite to the guide plate, an oil port being arranged at the bottom of the oil groove, an oil replenishing pipeline connected to the oil port, a sealing member being inserted in the oil groove, an oil guide groove being arranged on the sealing member, an oil guide hole being arranged at the bottom of the oil guide groove, the oil guide hole being butted against the oil port on the housing, and the oil guide hole being connected to the oil groove hole through the oil guide groove; an oil inlet pipeline connected between the oil inlet of the oil pump and the oil tank, the oil pump is started to deliver lubricating oil, the lubricating oil passes through the oil replenishing pipeline, the oil port, the oil guide hole to the oil groove hole, and finally lubricates the saw chain on the guide plate.

[0005] When the chain saw is working to cut wood, fine wood chips can easily enter the oil outlet on the shell and block the oil outlet, resulting in obstructed oil circuit and blockage. In this case, the wood chips at the oil outlet are not easy to clean. If the oil outlet is blocked and oil is discharged at too high a pressure, the internal oil circuit will be damaged. In addition, obstructed oil circuit can easily lead to insufficient lubrication and cooling of the chain saw chain, greatly reducing the service life of the chain saw. Utility Model Content

[0006] Based on the problem that when a chainsaw is working to cut wood, it is easy for fine wood chips to enter the oil outlet on the housing, blocking the oil outlet, resulting in poor oil flow and blocked roads. The blocked oil outlet is not easy to clean. If the oil is discharged under excessive pressure, it will cause damage to the internal oil circuit. And poor oil flow is likely to cause insufficient lubrication and cooling of the chainsaw chain, greatly reducing the service life of the chainsaw. The present utility model provides an anti-blocking structure for the oil outlet of a chainsaw and a chainsaw.

[0007] The technical solution adopted by the present utility model to solve the above technical problems is as follows: The anti-blocking structure for the oil outlet of a chainsaw includes a housing and a guide plate for installing a saw chain. The guide plate is installed on one side of the housing. An oil outlet is provided on the housing, and a conveying hole communicating with the oil outlet is provided on the guide plate. Lubricating oil is transported through the oil outlet to the conveying hole to lubricate the saw chain. An embedding groove is provided on the side of the housing opposite to the guide plate. The oil outlet is arranged in the embedding groove. An elastic seal is inserted and fixed in the embedding groove. A oil guiding hole is provided on the elastic seal. One end of the oil guiding hole is butted against the oil outlet, and the other end of the oil guiding hole communicates with the conveying hole. A filter screen is provided between the oil guiding hole and the oil outlet, and the filter screen covers the oil outlet.

[0008] A further preferred technical solution of the present utility model is: A convex column protruding towards the guide plate side is provided at the bottom of the embedding groove. The oil outlet is arranged on the end face of the convex column. A groove is provided at the bottom of the elastic seal for the convex column to insert upward and inwards. One end of the oil guiding hole communicates with the upper bottom of the groove. The filter screen is fixed between the end face of the convex column and the upper bottom of the groove.

[0009] A further preferred technical solution of the present utility model is: An oil guiding groove is provided on the side of the elastic seal opposite to the guide plate. A convex platform protruding towards the guide plate side is provided in the oil guiding groove. The oil guiding hole is arranged on the top surface of the convex platform opposite to the guide plate. The guide plate presses on the elastic seal and is in sealing contact with the four peripheral edges of the oil guiding groove. And there is a gap between the guide plate and the top surface of the convex platform. A oil guiding channel communicating the oil guiding hole and the conveying hole is formed between the guide plate and the elastic seal.

[0010] A further preferred technical solution of the present utility model is: The thickness of the elastic seal is greater than the depth of the embedding groove. When the guide plate is installed on one side of the housing, the guide plate is attached to the surface of the housing with the embedding groove, and the guide plate presses on the elastic seal and is in interference fit with the four peripheral edges of the oil guiding groove.

[0011] A further preferred technical solution of the present utility model is: The distance from the bottom of the elastic seal to the top surface of the convex platform is less than the depth of the embedding groove. When the guide plate is installed on one side of the housing, the guide plate is attached to the surface of the housing with the embedding groove, and there is an oil outlet gap between the guide plate and the top surface of the convex platform.

[0012] A further preferred technical solution of the present utility model is that the convex post is a cylinder, the groove is a cylindrical groove that fits the shape of the convex post, and the filter screen is a circular filter screen that fits the shape of the groove.

[0013] A further preferred technical solution of the present utility model is that the oil guide groove is a long groove, a convex platform is provided at one end of the oil guide groove, and the conveying hole is opposite to the other end of the oil guide groove.

[0014] A further preferred technical solution of the present utility model is that the elastic seal is made of silica gel or rubber.

[0015] A further preferred technical solution of the present utility model is that the filter screen is a 200-mesh filter screen.

[0016] Another theme: A chain saw, including an anti-blocking structure for the oil outlet of the chain saw.

[0017] Compared with the prior art, the advantages of the present utility model are that an embedding groove is provided on one side of the housing opposite to the guide plate, an elastic seal is inserted and fixed in the embedding groove, an oil guide hole is provided on the elastic seal, one end of the oil guide hole is butted against the oil outlet, the other end of the oil guide hole is communicated with the conveying hole, a filter screen is provided between the oil guide hole and the oil outlet, the filter screen blocks the oil outlet, which can prevent fine wood chips from entering the oil outlet. When the wood chips accumulate on the filter screen and block the oil outlet, only need to take out the elastic seal from the embedding groove, clean or replace the filter screen, which is convenient for cleaning when the oil outlet is blocked, so that the oil path becomes smooth, can provide sufficient lubricating oil for the saw chain of the chain saw, and ensure its lubrication and cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is a partial schematic view of the chain saw Figure 1 ;

[0020] Figure 2 It is a partial schematic view of the chain saw Figure 2 ;

[0021] Figure 3 It is an exploded view of the housing and the guide plate;

[0022] Figure 4 It is an exploded view of the housing, the guide plate, the elastic seal and the filter screen;

[0023] Figure 5For Figure 4 Partial enlarged view of location A of

[0024] Figure 6 Schematic structure of the elastic seal Figure 1 ;

[0025] Figure 7 Schematic structure of the elastic seal Figure 2 ;

[0026] Figure 8 Schematic structure diagram of the housing;

[0027] Figure 9 Partial sectional view of the chain saw;

[0028] Figure 10 For Figure 9 Partial enlarged view of location B of

[0029] In the figure: 1. Housing; 2. Guide plate; 3. Delivery hole; 4. Worm; 5. Worm gear; 6. Oil pump; 7. Inlet joint; 8. Outlet joint; 9. Hose; 10. Outlet pipeline; 11. Elastic seal; 12. Embedded groove; 13. Oil guide groove; 14. Boss; 15. Oil guide hole; 16. Convex column; 17. Filter screen; 18. Outlet; 19. Groove; 20. Upper bottom; 21. Top surface; 22. Oil guide channel. Detailed implementation manners

[0030] The preferred embodiments of the present utility model will be described in detail below with reference to the drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present utility model.

[0031] It should be noted that: Similar reference numerals denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0032] Figures 1 - 10 As shown, the chain saw includes a housing 1, a motor, a sprocket, a guide plate 2 fixedly arranged on the housing 1, and a saw chain wound around the sprocket and the guide plate 2. The saw chain is rotatably installed between the sprocket and the guide plate 2. The sprocket is connected to the output shaft of the motor and is driven by the output shaft to rotate. When the sprocket rotates, the saw chain moves around the sprocket and the guide plate 2 to perform a cutting operation.

[0033] Figure 2 As shown, a worm 4 is connected to the output shaft, and an oil pump 6 is installed in the housing 1. The oil pump 6 includes a worm gear 5 meshed with the worm 4, an inlet joint 7 and an outlet joint 8. A fuel tank is provided on the housing 1, and the fuel tank is connected to the inlet joint 7 through a hose 9. The worm 4 drives the worm gear 5 on the oil pump 6 to rotate, so that the oil pump 6 pumps out the oil in the fuel tank and conveys it outwards.

[0034] An oil outlet 18 is provided on the housing 1. Specifically, an oil outlet pipe 10 is provided on the housing 1. The oil outlet joint 8 is connected to the pipe opening of the oil outlet pipe 10 inside the housing 1 through a hose 9, and the oil outlet 18 is the pipe opening of the oil outlet pipe 10 outside the housing 1.

[0035] Figure 1 、 Figure 3 As shown, the above-mentioned guide plate 2 is detachably installed on one side outside the housing 1. A conveying hole 3 communicating with the oil outlet 18 is provided on the guide plate 2. The lubricating oil transported outward by the oil pump 6 enters the oil outlet pipe 10 and is then transported from the oil outlet 18 to the conveying hole 3 to lubricate the saw chain, so as to achieve effects such as reducing the working temperature and improving the sawing efficiency.

[0036] The structures of the above-mentioned chain saws are the same as those of the existing chain saws and will not be elaborated too much. The main difference of this patent lies in the anti-blocking structure of the oil saw lubrication system, and the specific content is as follows:

[0037] Figures 3 - 5 As shown, an embedding groove 12 is provided on the side of the housing 1 opposite to the guide plate 2. The oil outlet 18 is arranged in the embedding groove 12. An elastic seal 11 is inserted and fixed in the embedding groove 12. An oil guiding hole 15 is provided on the elastic seal 11. One end of the oil guiding hole 15 is butted against the oil outlet 18, and the other end of the oil guiding hole 15 communicates with the conveying hole 3, so that the lubricating oil flowing out of the oil outlet 18 is transported to the conveying hole 3 after passing through the oil guiding hole 15. A filter screen 17 is provided between the oil guiding hole 15 and the oil outlet 18, and the filter screen 17 covers the oil outlet 18.

[0038] The elastic seal 11 is inserted in the embedding groove 12 and can be closely fitted or interference-fitted with the inner wall of the embedding groove 12, so that the sealing performance between the elastic seal 11 and the inner wall of the embedding groove 12 is better. Preferably, the elastic seal 11 is made of silica gel or rubber.

[0039] The above-mentioned filter screen 17 covers the oil outlet 18, which can prevent fine wood chips from entering the oil outlet 18. When the wood chips accumulate on the filter screen 17 and block the oil outlet 18, only need to remove the guide plate 2 from the housing 1, take out the elastic seal 11 from the embedding groove 12, and clean or replace the filter screen 17, which is convenient for cleaning when the oil outlet 18 is blocked, so that the oil path becomes smooth, can provide sufficient lubricating oil for the saw chain of the chain saw, and ensure its lubrication and cooling.

[0040] Figure 7 、 Figure 8As shown, a convex column 16 protruding from one side of the guide plate 2 is provided at the bottom of the slot 12. The oil outlet 18 is arranged on the end face of the convex column 16. A groove 19 is provided at the bottom of the elastic seal 11 and recessed upward for the convex column 16 to insert. One end of the oil guiding hole 15 is communicated with the upper bottom 20 of the groove 19. The filter screen 17 is fixed between the end face of the convex column 16 and the upper bottom 20 of the groove 19.

[0041] During installation, only need to put the filter screen 17 into the groove 19, and then plug the elastic seal 11 into the slot 12, so that the groove 19 is sleeved on the convex column 16. At this time, the convex column 16 is inserted into the groove 19 to tightly press the filter screen 17 on the upper bottom 20 of the groove 19 for fixation, completing the installation of the filter screen 17.

[0042] Preferably, the convex column 16 is a cylinder, the groove 19 is a cylindrical groove matching the shape of the convex column 16, the filter screen 17 is a circular filter screen 17 matching the shape of the groove 19. When the convex column 16 is inserted into the groove 19, the inner wall of the convex column 16 is in close contact or interference fit with the inner wall of the groove 19, ensuring the sealing between the convex column 16 and the groove 19, so that the lubricating oil can only enter the oil guiding hole 15 through the filter screen 17 from the oil outlet 18.

[0043] Figures 6 - 10 As shown, an oil guiding groove 13 is provided on the side of the elastic seal 11 opposite to the guide plate 2. A convex platform 14 protruding from one side of the guide plate 2 is arranged in the oil guiding groove 13. The oil guiding hole 15 is arranged on the top surface 21 opposite to the guide plate 2 of the convex platform 14. The guide plate 2 is pressed on the elastic seal 11 and is in sealing contact with the four peripheral edges of the oil guiding groove 13. And there is a gap between the guide plate 2 and the top surface 21 of the convex platform 14. A oil guiding channel 22 communicating the oil guiding hole 15 and the conveying hole 3 is formed between the guide plate 2 and the elastic seal 11.

[0044] Specifically, the thickness of the elastic seal 11 is greater than the depth of the slot 12. When the elastic seal 11 is plugged into the slot 12, a part of the elastic seal 11 protrudes from the notch of the slot 12. Then the guide plate 2 is installed on one side of the housing 1, and the guide plate 2 is attached to the surface of the housing 1 with the slot 12. At this time, the guide plate 2 presses the elastic seal 11 to make the elastic seal 11 elastically deformed. The guide plate 2 is pressed on the elastic seal 11 and is in interference fit with the four peripheral edges of the oil guiding groove 13, so that the guide plate 2 is in sealing contact with the four peripheral edges of the oil guiding groove 13.

[0045] The distance from the bottom of the elastic seal 11 to the top surface 21 of the convex platform 14 is less than the depth of the slot 12. When the elastic seal 11 is plugged into the slot 12, the top surface 21 of the convex platform 14 is lower than the notch of the slot 12. When the guide plate 2 is installed on one side of the housing 1, the guide plate 2 is attached to the surface of the housing 1 with the slot 12. At this time, there is a gap between the guide plate 2 and the convex platform 14 for the oil guiding hole 15 to discharge oil into the oil guiding groove 13.

[0046] The oil guiding channel 22 is composed of a gap and an oil guiding groove 13.

[0047] Through the structure of the convex post 16, the height of the oil outlet 18 is raised, and then through the structure of the convex platform 14, the gap between the oil outlet 18 and the guide plate 2 is reduced. When the chainsaw works to cut wood, only a thin layer of fine wood chips can accumulate above the oil outlet 18. When the oil outlet 18 is blocked by the accumulated wood chips above, due to the thinness of the accumulated wood chips, the large-flow oil pump 6 will form a pulsed flow impact when delivering lubricating oil outward to flush it open, so that the oil outlet 18 is not easily blocked.

[0048] Preferably, the filter screen 17 is a 200-mesh filter screen 17. While preventing wood chips, the wood chips accumulated on the surface can contribute to the formation of a pulsed flow.

[0049] The orifice of the conveying hole 3 is relatively small, generally a few millimeters, so it is also easily blocked by wood chips. The oil guiding groove 13 is arranged as a long groove, and the convex platform 14 is arranged at one end of the oil guiding groove 13. The conveying hole 3 is opposite to the other end of the oil guiding groove 13, so that a section of oil guiding channel 22 is formed between the conveying hole 3 and the oil guiding hole 15. Also, because the guide plate 2 presses on the elastic seal 11 and is in sealing contact with the four peripheries of the oil guiding groove 13, when the conveying hole 3 is blocked by wood chips, a sealed environment will be formed in the oil guiding groove 13. When the large-flow oil pump 6 delivers lubricating oil outward, the lubricating oil will form a pulsed flow impact when entering the oil guiding channel 22 to flush the wood chips blocked in the conveying hole 3 outward, so that the conveying hole 3 is not easily blocked.

[0050] The anti-blocking structure of the oil outlet of the chainsaw and the chainsaw provided by the present utility model are introduced above. Specific examples are used in this article to elaborate the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the present utility model and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. Anti-blocking structure for the oil outlet of a chain saw, comprising a housing, a guide plate for installing a saw chain, the guide plate is installed on one side of the housing, an oil outlet is provided on the housing, a conveying hole communicating with the oil outlet is provided on the guide plate, and lubricating oil is conveyed to the conveying hole through the oil outlet to lubricate the saw chain, characterized in that, On one side of the housing opposite to the guide plate, there is an embedding groove, the oil outlet is arranged in the embedding groove, an elastic seal is inserted and fixed in the embedding groove, an oil guiding hole is arranged on the elastic seal, one end of the oil guiding hole is butted against the oil outlet, the other end of the oil guiding hole is communicated with the conveying hole, a filter screen is arranged between the oil guiding hole and the oil outlet, and the filter screen shields the oil outlet.

2. The anti-blocking structure of the oil outlet of the chainsaw according to claim 1, characterized in that, At the bottom of the embedding groove, there is a convex column protruding towards the guide plate side, the oil outlet is arranged on the end face of the convex column, at the bottom of the elastic seal, there is a groove recessed upwards for the convex column to insert, one end of the oil guiding hole is communicated with the upper bottom of the groove, and the filter screen is fixed between the end face of the convex column and the upper bottom of the groove.

3. The anti-blocking structure of the oil outlet of the chain saw according to claim 2, characterized in that, On one side of the elastic seal opposite to the guide plate, there is an oil guiding groove, a convex platform protruding towards the guide plate side is arranged in the oil guiding groove, the oil guiding hole is arranged on the top surface opposite to the guide plate of the convex platform, the guide plate is pressed on the elastic seal and is in sealing contact with the four peripheral edges of the oil guiding groove, and there is a gap between the guide plate and the top surface of the convex platform, and an oil guiding channel communicating the oil guiding hole and the conveying hole is formed between the guide plate and the elastic seal.

4. The anti-blocking structure of the oil outlet of the chainsaw according to claim 3, characterized in that, The thickness of the elastic seal is greater than the depth of the embedding groove. When the guide plate is installed on one side of the housing, the guide plate fits the surface of the housing with the embedding groove, and the guide plate presses on the elastic seal and is in interference fit with the four peripheral edges of the oil guiding groove.

5. The anti-clogging structure of the oil outlet of the chainsaw according to claim 3, characterized in that, The distance from the bottom of the elastic seal to the top surface of the convex platform is less than the depth of the embedding groove. When the guide plate is installed on one side of the housing, the guide plate fits the surface of the housing with the embedding groove, and there is an oil outlet gap between the guide plate and the top surface of the convex platform.

6. The anti-blocking structure of the oil outlet of the chainsaw according to claim 2, characterized in that, The convex column is a cylinder, the groove is a cylindrical groove matching the shape of the convex column, and the filter screen is a circular filter screen matching the shape of the groove.

7. The anti-clogging structure of the oil outlet of the chain saw according to claim 3, characterized in that, The oil guiding groove is a long groove, the convex platform is arranged at one end of the oil guiding groove, and the conveying hole is opposite to the other end of the oil guiding groove.

8. The anti-blocking structure of the oil outlet of the chainsaw according to claim 1, characterized in that The elastic seal is made of silicone or rubber material.

9. The anti-blocking structure of the oil outlet of the chain saw according to claim 1, wherein, The filter screen is a 200-mesh filter screen.

10. A chain saw, characterized in that, It includes the anti-blocking structure of the chain saw oil outlet according to any one of claims 1-9.

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