Saw chain tensioning and locking mechanism of chain saw

Abstract

The utility model relates to the technical field of chain saws, and particularly discloses a saw chain tensioning and locking mechanism of a chain saw, which comprises an adjusting box and an arc-shaped support, a spring rod piece used for supporting the arc-shaped support in a floating manner is arranged at the upper end of the adjusting box, a pressure adjusting device used for adjusting the supporting height of the spring rod piece is arranged at the lower end of the adjusting box, and a movable frame is arranged on the side edge of the adjusting box. The end, close to the adjusting box, of the movable frame is rotationally connected with the adjusting box, a rotating wheel is arranged at the other end of the movable frame and rotationally connected with the movable frame, and a groove for containing cleaning liquid is formed in the upper end face of the rotating wheel. After the arc-shaped support ascends to tension the chain, the movable frame is poked, the rotating wheel is moved to the position below the chain, the chain in the tensioned state passes through the groove, in the passing process of the chain, the cleaning liquid in the rotating wheel can continuously clean the chain, and the saw chain is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of chain saws, in particular to a saw chain tensioning and locking mechanism of a chain saw. Background Art

[0002] Chain saws, also known as oil saws, are hand-held saws powered by gasoline engines. They are mainly used for logging and timber making. Their working principle is to perform shearing actions by the lateral movement of the staggered L-shaped blades on the saw chain. Chain saws are generally divided into motorized chain saws and non-motorized chain saws. After replacing and installing a new chain, the chain needs to be tensioned and the chain tension needs to be checked and readjusted if necessary. New chains need to be tensioned more frequently than chains that have been used for a period of time. When the chain is cold, it must be attached to the lower part of the guide bar, but the chain can be moved on the upper guide bar by hand. If necessary, re-tension the chain.

[0003] During the tensioning process or daily use of the chain saw chain, due to the working environment, it will be contaminated with some debris (such as mud, dust, metal grinding chips, etc.). The debris will cause additional friction between the chain and gears, accelerate the wear of the parts, and shorten the service life of the chain and related transmission parts. Therefore, people need to clean the chain. During the cleaning process, use more water or cleaning fluid to rinse the chain to remove the remaining debris, and then wipe it with a dry cloth or let it dry naturally. After the chain is completely dry, it is necessary to reapply appropriate chain oil or lubricant to protect the chain and ensure its smooth operation. Since the cleaning step requires the use of special chain washing equipment, the chain washing equipment is separated from the tensioning mechanism. In the event of unprepared conditions, there is no way to maintain the chain in time, which affects the use of the locking mechanism and the saw chain. Utility Model Content

[0004] In view of the above problems, the utility model proposes a chain tensioning and locking mechanism for a chain saw, which is used to solve the shortcomings of the prior art that the chain washing device and the tensioning mechanism are separated independently, and when unprepared, there is no way to maintain the chain in time, which affects the use of the locking mechanism and the saw chain.

[0005] To achieve the purpose of the utility model, the utility model is implemented by the following technical solutions: a chain saw tensioning and locking mechanism, comprising an adjusting box and an arc-shaped support, the arc-shaped support is placed above the adjusting box, a spring rod for floatingly supporting the arc-shaped support is provided at the upper end of the adjusting box, the spring rod is slidably connected to the adjusting box, and a pressure regulating device for adjusting the support height of the spring rod is provided at the lower end of the adjusting box;

[0006] A movable frame is provided on the side of the regulating box, and one end of the movable frame close to the regulating box is rotatably connected to the regulating box. A rotating wheel is provided at the other end of the movable frame, and the rotating wheel is rotatably connected to the movable frame. A groove for accommodating cleaning liquid is provided on the upper end surface of the rotating wheel.

[0007] A further improvement is that the connection between the movable frame and the adjusting box and between the movable frame and the rotating wheel are both provided with butterfly springs for increasing the damping of the connection between the movable frame and the adjusting box and between the movable frame and the rotating wheel.

[0008] A further improvement is that a check rod is provided on the outer side of the regulating box, the check rod is fixedly connected to the regulating box, and the check rod is in contact with the lower end surface of the movable frame.

[0009] A further improvement is that the spring rod member includes a movable rod, a movable hole and a first movable block, the movable hole is opened at the upper end of the adjusting box, the movable rod is fixedly connected to the lower end of the arc-shaped support, the lower end of the movable rod is inserted into the movable hole and fixedly connected to the first movable block arranged in the adjusting box, a spring is provided at the lower end of the first movable block, the spring is fixedly connected to the first movable block, and the movable rod is slidably connected to the movable hole.

[0010] A further improvement is that the pressure regulating device includes an adjusting bolt and a threaded hole, the threaded hole is opened at the lower end of the regulating box, the upper end of the adjusting bolt passes through the threaded hole and is rotatably connected to the second movable block arranged in the regulating box, and the adjusting bolt is threadedly connected to the threaded hole.

[0011] Further improvement is that: a limit rod is provided in the adjustment box, both ends of the limit rod are fixedly connected to the adjustment box, a first sliding sleeve and a second sliding sleeve are provided on the outer side of the limit rod, the first sliding sleeve and the second sliding sleeve are both slidably connected to the limit rod, the second sliding sleeve is fixedly connected to the first movable block, and the first sliding sleeve is slidably connected to the second movable block.

[0012] The beneficial effects of the utility model are:

[0013] After the arc-shaped support rises to tension the chain, the movable frame is moved to move the rotating wheel under the chain. The chain in the tensioned state passes through the groove. During the chain passing, the cleaning liquid in the rotating wheel can continuously clean the chain, making the saw chain maintenance convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a structural diagram of the arc-shaped support in the utility model.

[0016] Figure 2 It is a structural diagram of the rotating wheel in the utility model.

[0017] Figure 3 It is a structural diagram of the interior of the regulating box in the utility model.

[0018] Among them: 1. Adjustment box; 2. Arc support; 3. Movable rod; 4. Adjustment bolt; 5. Movable frame; 6. Rotating wheel; 7. Groove; 8. Check rod; 9. First movable block; 10. Second movable block; 11. Spring; 12. Limit rod; 13. First sliding sleeve; 14. Second sliding sleeve; 15. Threaded hole; 16. Movable hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0020] according to Figure 1 , 2 As shown in Figures 3 and 4, a chain saw tensioning and locking mechanism is provided in this embodiment, comprising an adjusting box 1 and an arc-shaped support 2, wherein the arc-shaped support 2 is placed above the adjusting box 1, a spring rod for floatingly supporting the arc-shaped support 2 is provided at the upper end of the adjusting box 1, the spring rod is slidably connected to the adjusting box 1, and a pressure regulating device for adjusting the supporting height of the spring rod is provided at the lower end of the adjusting box 1;

[0021] The adjustment box 1 is installed below the saw chain of the chain saw. The spring rod supports the arc support 2, and the arc support 2 tensions the saw chain. The support height of the spring rod can be adjusted. By changing the height of the arc support 2 through the pressure adjustment device, the tension of the saw chain can be adjusted.

[0022] A movable frame 5 is provided on the side of the regulating box 1. One end of the movable frame 5 close to the regulating box 1 is rotatably connected to the regulating box 1. A rotating wheel 6 is provided at the other end of the movable frame 5. The rotating wheel 6 is rotatably connected to the movable frame 5. A groove 7 for accommodating cleaning liquid is provided on the upper end surface of the rotating wheel 6.

[0023] When cleaning the chain, the cleaning liquid is introduced into the groove 7. After the arc-shaped support 2 rises to tighten the chain, the movable frame 5 is moved to move the rotating wheel 6 to the bottom of the chain. The chain in the tensioned state passes through the groove 7. During the chain passing through, the cleaning liquid in the rotating wheel 6 can continuously clean the chain, and the saw chain maintenance is convenient.

[0024] It should be noted that the connection between the movable frame 5 and the adjusting box 1 and the movable frame 5 and the rotating wheel 6 is provided with a butterfly spring for increasing the damping of the connection between the movable frame 5 and the adjusting box 1 and the movable frame 5 and the rotating wheel 6. Through the damping friction between the movable frame 5 and the adjusting box 1, when the movable frame 5 is moved, the movable frame 5 can still remain stationary, and the user does not need to hold the rotating wheel 6 continuously with his hand.

[0025] In a preferred embodiment, a check rod 8 is provided on the outside of the adjusting box 1, the check rod 8 is fixedly connected to the adjusting box 1, and the check rod 8 contacts the lower end surface of the movable frame 5. The check rod 8 provided below the movable frame 5 can limit the movable frame 5 from falling further downward, making it convenient for the user to pour the cleaning liquid into the groove 7.

[0026] For the specific structure of the spring rod, please refer to the following description.

[0027] The spring rod member includes a movable rod 3, a movable hole 16 and a first movable block 9. The movable hole 16 is provided at the upper end of the adjustment box 1. The movable rod 3 is fixedly connected to the lower end of the arc-shaped support 2. The lower end of the movable rod 3 is inserted into the movable hole 16 and is fixedly connected to the first movable block 9 provided in the adjustment box 1. A spring 11 is provided at the lower end of the first movable block 9. The spring 11 is fixedly connected to the first movable block 9. The movable rod 3 is slidably connected to the movable hole 16. The spring 11 pushes the first movable block 9 upward, and the movable rod 3 pushes the arc-shaped support 2 to tension the saw chain.

[0028] For the specific structure of the pressure regulating device, please refer to the following description.

[0029] The pressure regulating device includes an adjusting bolt 4 and a threaded hole 15 . The threaded hole 15 is provided at the lower end of the regulating box 1 . The upper end of the adjusting bolt 4 passes through the threaded hole 15 and is rotatably connected to the second movable block 10 provided in the regulating box 1 . The adjusting bolt 4 is threadedly connected to the threaded hole 15 .

[0030] The regulating principle of the pressure regulating device is as follows:

[0031] Turn the adjusting bolt 4 and rotate it upward. When the adjusting bolt 4 rises, it will push the second movable block 10 to rise. After rising, the second movable block 10 will squeeze the spring 11. Under the push of the spring 11, the first movable block 9 will also push the movable rod 3 and the arc-shaped support 2 to rise, and the tensioning force of the chain will increase. Conversely, rotate the adjusting bolt 4 downward, the second movable block 10 will pull the spring 11 to fall, the first movable block 9 and the movable rod 3 will also fall back, and the tensioning force of the chain will decrease.

[0032] In order to avoid the first movable block 9 and the second movable block 10 from tilting when the height is adjusted in the adjusting box 1, in a preferred embodiment, a limit rod 12 is provided in the adjusting box 1, and both ends of the limit rod 12 are fixedly connected to the adjusting box 1, and a first sliding sleeve 13 and a second sliding sleeve 14 are sleeved on the outer side of the limit rod 12, and the first sliding sleeve 13 and the second sliding sleeve 14 are both slidably connected to the limit rod 12, the second sliding sleeve 14 is fixedly connected to the first movable block 9, and the first sliding sleeve 13 is slidably connected to the second movable block 10.

[0033] When the first movable block 9 and the second movable block 10 rise or fall in the adjusting box 1 under the push of the adjusting bolt 4, the second sliding sleeve 14 and the first sliding sleeve 13 of the first movable block 9 and the second movable block 10 will also move accordingly. The first sliding sleeve 13 and the second sliding sleeve 14 are slidably connected with the limiting rod 12. The limiting rod 12 will guide the first sliding sleeve 13 and the second sliding sleeve 14 to prevent the first movable block 9 and the second movable block 10 from tilting during adjustment.

[0034] How this application works:

[0035] The adjustment box 1 is installed below the chain saw chain, and the spring rod supports the arc support 2, which tensions the saw chain. The support height of the spring rod can be adjusted, and the tension of the saw chain can be adjusted by changing the height of the arc support 2 through the pressure adjustment device. When cleaning the chain, the cleaning liquid is introduced into the groove 7, and after the arc support 2 rises to tension the chain, the movable frame 5 is moved to move the rotating wheel 6 to the bottom of the chain. The chain in the tensioned state passes through the groove 7. During the chain passing, the cleaning liquid in the rotating wheel 6 can continuously clean the chain, and the saw chain is easy to maintain.

[0036] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0037] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A chain tensioning and locking mechanism for a chain saw, comprising an adjusting box (1) and an arc-shaped support (2), wherein the arc-shaped support (2) is placed above the adjusting box (1), and is characterized in that: The upper end of the regulating box (1) is provided with a spring rod for floatingly supporting the arc-shaped support (2), the spring rod is slidably connected to the regulating box (1), and the lower end of the regulating box (1) is provided with a pressure regulating device for adjusting the supporting height of the spring rod; A movable frame (5) is provided on the side of the regulating box (1); one end of the movable frame (5) close to the regulating box (1) is rotatably connected to the regulating box (1); a rotating wheel (6) is provided at the other end of the movable frame (5); the rotating wheel (6) is rotatably connected to the movable frame (5); and a groove (7) for accommodating cleaning liquid is provided on the upper end surface of the rotating wheel (6).

2. The chain saw chain tensioning and locking mechanism according to claim 1, characterized in that: The connection points between the movable frame (5) and the regulating box (1) and between the movable frame (5) and the rotating wheel (6) are both provided with butterfly springs for increasing the damping of the connection points between the movable frame (5) and the regulating box (1) and between the movable frame (5) and the rotating wheel (6).

3. The chain saw chain tensioning and locking mechanism according to claim 1, characterized in that: A check rod (8) is provided on the outside of the regulating box (1), the check rod (8) is fixedly connected to the regulating box (1), and the check rod (8) is in contact with the lower end surface of the movable frame (5).

4. The chain saw chain tensioning and locking mechanism according to claim 1, characterized in that: The spring rod member comprises a movable rod (3), a movable hole (16) and a first movable block (9); the movable hole (16) is provided at the upper end of the regulating box (1); the movable rod (3) is fixedly connected to the lower end of the arc-shaped support (2); the lower end of the movable rod (3) is inserted into the movable hole (16) and is fixedly connected to the first movable block (9) provided in the regulating box (1); a spring (11) is provided at the lower end of the first movable block (9); the spring (11) is fixedly connected to the first movable block (9); and the movable rod (3) is slidably connected to the movable hole (16).

5. The chain saw chain tensioning and locking mechanism according to claim 4, characterized in that: The pressure regulating device comprises an adjusting bolt (4) and a threaded hole (15); the threaded hole (15) is provided at the lower end of the adjusting box (1); the upper end of the adjusting bolt (4) passes through the threaded hole (15) and is rotatably connected to a second movable block (10) provided in the adjusting box (1); and the adjusting bolt (4) is threadably connected to the threaded hole (15).

6. The chain saw tensioning and locking mechanism of claim 5, characterized in that: The regulating box (1) is provided with a limiting rod (12), both ends of which are fixedly connected to the regulating box (1), a first sliding sleeve (13) and a second sliding sleeve (14) are sleeved on the outer side of the limiting rod (12), the first sliding sleeve (13) and the second sliding sleeve (14) are both slidably connected to the limiting rod (12), the second sliding sleeve (14) is fixedly connected to the first movable block (9), and the first sliding sleeve (13) is slidably connected to the second movable block (10).

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