CN217433228U

CN217433228U - Chain saw capable of automatically adjusting tightness of saw chain

Info

Publication number: CN217433228U
Application number: CN202120818901.7U
Authority: CN
Inventors: 倪文彬; 黄建平
Original assignee: Jiangsu Dartek Technology Co Ltd
Current assignee: Jiangsu Dartek Technology Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2022-09-16
Anticipated expiration: 2031-04-21

Abstract

The utility model discloses a chain saw of self-adjusting saw chain elasticity relates to garden instrument technical field, need the manual work to adjust and adjust the easy problem of losing of instrument that uses to the elasticity of present chain, now proposes following scheme, and it includes power machine shell and baffle, power machine shell one side is provided with sprocket, spacing stick and tensioning adjustment tank, just tensioning adjustment tank inside is provided with straining device, straining device includes guide bar, locating pin and spring, just the locating pin is the integral type structure that movable block and tensioning round pin are constituteed, the guide bar sets up in the tensioning adjustment tank inside, movable block and spring all are the activity with the guide bar and cup joint the setting, just the spring is the extrusion laminating with the movable block and is connected, the tensioning round pin sets up in movable block one side. The utility model discloses novel structure, and the effectual elasticity of having solved present chain of the device need the manual work to adjust and adjust the problem that the instrument that uses lost easily.

Description

Chain saw capable of automatically adjusting tightness of saw chain

Technical Field

The utility model relates to a garden instrument technical field specifically is the chain saw of adjusting saw chain elasticity by oneself.

Background

The chain saw belongs to forest lumbering, saw off timber, orchard pruning, split firewood, small-size gardens tool for construction operations such as lumbering, can realize cutting various different timber, make the material and cut the timber, cutting operations such as forestry is reaped, chain link piece clearance can be taut after the saw chain uses a period of time, the chain can warp and become loose, produce serious potential safety hazard, this moment, need artifical tensioning degree that uses random tool to adjust the chain, the general complex operation of accommodation process, random tool exists the damage simultaneously, defects such as easy loss, very big inconvenience has been brought for the user, in order to solve this problem, we have provided the chain saw of self-regulating saw chain elasticity.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a chain saw of adjusting saw chain elasticity by oneself, the elasticity that has solved present chain needs the manual work to adjust and adjust the instrument of use and loses the problem easily.

In order to achieve the above object, the utility model provides a following technical scheme: a chain saw capable of automatically adjusting the tightness of a saw chain comprises a power machine shell and a guide plate, wherein one side of the power machine shell is provided with a chain wheel, a limiting strip block and a tensioning adjusting groove, a tensioning mechanism is arranged inside the tensioning adjusting groove and comprises a guide rod, a positioning pin and a spring, the positioning pin is an integrated structure consisting of a movable block and a tensioning pin, the guide rod is arranged inside the tensioning adjusting groove, the movable block and the spring are movably sleeved with the guide rod, the spring and the movable block are connected in an extrusion laminating manner, the tensioning pin is arranged on one side of the movable block, the tensioning pin is vertically arranged with the guide rod, one end of the guide plate is provided with a limiting sliding groove, the limiting sliding groove and the limiting strip block are slidably mounted, pin holes are formed in two sides of the limiting sliding groove, the pin holes and the tensioning pin are matched with each other, and a guide chain groove is formed in the peripheral wall of the guide plate, and a chain is arranged in the chain guide groove, the chain is meshed with the chain wheel, the chain cover is matched with one end of the power shell, a nut is arranged on one side of the chain cover, a bolt is arranged at one end of the side wall of the limiting strip block, and the bolt is in threaded matching connection with the nut.

As a preferred embodiment of the utility model, straining device includes spring box, cavity and salient angle piece, just spring box one end is seted up to the cavity, the spring sets up inside the cavity, just spring one end is the extrusion laminating with the cavity inner wall and is connected, just the spring other end is fixed connection with tensioning adjustment tank one end, salient angle piece fixed mounting is in spring box one side, just the salient angle piece is the joint setting with the spacing spout of baffle one end, spring box is slidable mounting with the tensioning adjustment tank.

As a preferred embodiment of the present invention, the guide plate is fixed to the side wall of one end of the power casing through the matching of the screw threads of the bolt and the nut.

As a preferred embodiment of the utility model, the movable block is movable mounting with the tensioning adjustment tank, just the one end that the movable block was kept away from to the spring is fixed connection with tensioning adjustment tank one end.

As a preferred embodiment of the present invention, the sprocket is in transmission connection with the driving motor inside the power casing.

As a preferred embodiment of the present invention, the sprocket and the limiting block are located on the same horizontal line.

The utility model has the advantages that:

when lax appears in the chain, through straining device's setting for the baffle removes towards the opposite direction of sprocket, and then adjusts the tensioning degree of chain through the interval of adjusting sprocket and baffle, and it is convenient that it adjusts simple operation, only need twist the nut and can accomplish the regulation, to sum up, the effectual elasticity of having solved present chain of the device needs the manual work to adjust and adjust the easy problem of losing of the instrument of use.

Drawings

FIG. 1 is an exploded view of a chain saw of the present invention, illustrating an embodiment 1 of a self-adjusting tightness of a saw chain;

FIG. 2 is a schematic view showing a state in which a spring member is loosened in an embodiment 1 of the chain saw of the present invention for self-adjusting the tightness of a saw chain;

FIG. 3 is a schematic view of an installation structure of a guide plate and a chain in embodiment 1 of the chain saw for self-adjusting the tightness of the saw chain of the present invention;

fig. 4 is an exploded view of the chain saw of the present invention for automatically adjusting the tightness of the saw chain according to embodiment 2;

FIG. 5 is a schematic view showing a structure of a guide plate and a chain not installed in the embodiment 2 of the chain saw for automatically adjusting the tightness of the saw chain according to the present invention;

fig. 6 is a schematic view of the guide plate and the chain mounting structure in embodiment 2 of the chain saw for automatically adjusting the tightness of the saw chain of the present invention.

Reference numerals:

1. a power housing; 2. a sprocket; 3. a convex corner block; 4. a tension adjustment groove; 5. a guide bar; 6. a spring; 7. a movable block; 8. a tensioning pin; 9. a limiting strip block; 10. a bolt; 11. a guide plate; 12. a limiting chute; 13. a chain guide groove; 14. a chain; 15. a chain cover; 16. a nut; 17. a pin hole; 18. a spring case; 19. A cavity.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, belong to the scope of protection of the invention.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured," etc. are to be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection. The two elements may be mechanically or electrically connected, directly or indirectly connected through an intermediate medium, or connected through a communication path between the two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art as appropriate.

Referring to fig. 1-6, the present invention provides a technical solution: the chain saw capable of automatically adjusting the tightness of the saw chain comprises a power machine shell 1, a chain cover 15 and a guide plate 11, wherein a chain wheel 2, a limiting strip 9 and a tensioning adjusting groove 4 are arranged on one side of the power machine shell 1, a tensioning mechanism is arranged inside the tensioning adjusting groove 4 and comprises a guide rod 5, a positioning pin and a spring 6, the positioning pin is an integrated structure consisting of a movable block 7 and a tensioning pin 8, the guide rod 5 is arranged inside the tensioning adjusting groove 4, the movable block 7 and the spring 6 are movably sleeved with the guide rod 5, the spring 6 is connected with the movable block 7 in an extrusion laminating manner, the tensioning pin 8 is arranged on one side of the movable block 7, the tensioning pin 8 is vertically arranged with the guide rod 5, a limiting sliding groove 12 is formed in one end of the guide plate 11, the limiting sliding groove 12 and the limiting strip 9 are mounted in a sliding manner, pin holes 17 are formed in two sides of the limiting sliding groove 12, and pinhole 17 and tensioning pin 8 are the hole round pin and match the setting, guide chain groove 13 has been seted up to baffle 11 perisporium, just be provided with chain 14 in the guide chain groove 13, chain 14 is the meshing setting with sprocket 2, chain cover 15 matches with power casing 1 one end, just chain cover 15 one side is provided with nut 16, spacing strip 9 lateral wall one end is provided with bolt 10, just bolt 10 is screw thread accordant connection with nut 16.

In the embodiment, referring to fig. 1, 2 and 3, when the chain 14 is loosened, the guide plate 11 is moved in the direction opposite to the sprocket 2 by the arrangement of the tensioning mechanism, and the tensioning degree of the chain 14 is adjusted by adjusting the distance between the sprocket 2 and the guide plate 11, so that the adjustment operation is simple and convenient, and the tensioning adjustment can be completed only by screwing the nut 16.

The tensioning mechanism comprises a spring box 18, a cavity 19 and a convex corner block 3, the cavity 19 is arranged at one end of the spring box 18, the spring 6 is arranged in the cavity 19, one end of the spring 6 is fixedly connected with the inner wall of the cavity 19, the other end of the spring 6 is connected with one end of a tensioning adjusting groove 4 in an extruding and laminating manner, the convex corner block 3 is fixedly arranged at one side of the spring box 18, the convex corner block 3 is clamped with a limiting sliding groove 12 at one end of a guide plate 11, the spring box 18 is slidably arranged with the tensioning adjusting groove 4, the guide plate 11 is fixed on the side wall at one end of the power machine shell 1 through a bolt 10 and a nut 16 in a threaded matching manner, the movable block 7 is movably arranged with the tensioning adjusting groove 4, one end of the spring 6 far away from the movable block 7 is fixedly connected with one end of the tensioning adjusting groove 4, and the chain wheel 2 is in transmission connection with a driving motor in the power machine shell 1, the chain wheel 2 and the limit block 9 are positioned on the same horizontal line.

Example 1:

as shown in fig. 1, 2 and 3, the tensioning mechanism comprises a guide rod 5, a movable block 7, a tensioning pin 8 and a spring 6, when the tensioning mechanism is installed, the movable block 7 and the spring 6 are sleeved on the guide rod 5 as shown in fig. 2, then the guide rod 5 is installed in a tensioning adjusting groove 4, then the tensioning pin 8 is sleeved on a pin hole 17 on a guide plate 11 to push the guide plate 11 to move towards the chain wheel 2, the installed spring 6 is in a compressed state, a forward pushing force is applied to the guide plate 11, so that the chain 14 is in a tensioned state, then a chain cover 15 is installed and locked by a nut 16, when the chain 14 is loosened and the chain 14 is not tensioned, the nut 16 is loosened, the guide plate 11 is moved towards the opposite direction of the chain wheel 2 through the movable block 7 and the tensioning pin 8 under the action of the spring 6 to tension the chain 14, then the nut 16 is locked, the chainsaw can be made to work again.

Example 2:

as shown in fig. 4, 5 and 6, the tensioning mechanism comprises a spring box 18, a cavity 19, a lobe block 3 and a spring 6, when the tensioning mechanism is installed, the spring 6 is installed in the cavity 19 of the spring box 18, then the spring 6 and the spring box 18 are installed in the tensioning adjusting groove 4 as shown in fig. 4, the lobe block 3 on one side of the spring box 18 is pushed by a guide plate 11 and is pushed towards the chain wheel 2, the installed spring 6 is in a compressed state, a forward pushing force is applied to the guide plate 11, so that the chain 14 is in a tensioned state, then the chain cover 15 is installed and locked by a nut 16, when the chain 14 is loosened after the chain saw works for a period of time, the chain 14 is in a loose danger that the chain 14 is loosened by not tensioning the chain 14, the nut 16 is loosened, the guide plate 11 moves towards the opposite direction of the chain wheel 2 through the spring box 18 and the lobe block 3 under the action of the spring 6, so that the chain 14 is tensioned, the nut 16 is then tightened, allowing the chain saw to be re-operated.

Other structures and operations of a single stage planetary gear train and bevel gear driven cutting and grinding machine according to embodiments of the present invention will be understood and readily implemented by those skilled in the art and will not be described in detail.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. Self-adjusting saw chain elasticity's chain saw, its characterized in that, including power casing (1), chain cover (15) and baffle (11), power casing (1) one side is provided with sprocket (2), spacing strip (9) and tensioning adjustment tank (4), just tensioning adjustment tank (4) inside is provided with straining device, straining device includes guide bar (5), locating pin and spring (6), just the locating pin is the integral type structure that movable block (7) and tensioning round pin (8) are constituteed, guide bar (5) set up inside tensioning adjustment tank (4), movable block (7) and spring (6) all are the activity with guide bar (5) and cup joint the setting, just spring (6) are extrusion laminating with movable block (7) and are connected, tensioning round pin (8) set up in movable block (7) one side, its tensioning round pin (8) are perpendicular setting with guide bar (5), guide plate (11) one end has been seted up spacing spout (12), just spacing spout (12) are slidable mounting with spacing piece (9), pinhole (17) have all been seted up to spacing spout (12) both sides, just pinhole (17) are the hole round pin with tensioning round pin (8) and match the setting, chain guide slot (13) have been seted up to guide plate (11) perisporium, just be provided with chain (14) in chain guide slot (13), chain (14) are the meshing setting with sprocket (2), chain cover (15) match with power casing (1) one end, just chain cover (15) one side is provided with nut (16), spacing piece (9) lateral wall one end is provided with bolt (10), just bolt (10) are screw thread accordant connection with nut (16).

2. The self-adjusting saw chain tightness chainsaw of claim 1, wherein: straining device includes spring box (18), cavity (19) and salient piece (3), just cavity (19) are seted up in spring box (18) one end, spring (6) set up inside cavity (19), just spring (6) one end is the extrusion laminating with cavity (19) inner wall and is connected, just spring (6) other end is fixed connection with tensioning adjustment tank (4) one end, salient piece (3) fixed mounting is in spring box (18) one side, just salient piece (3) are the joint setting with spacing spout (12) of baffle (11) one end, spring box (18) are slidable mounting with tensioning adjustment tank (4).

3. The self-adjusting saw chain tightness chainsaw of claim 1, wherein: the guide plate (11) is fixed on the side wall of one end of the power machine shell (1) in a threaded matching mode through a bolt (10) and a nut (16).

4. The self-adjusting saw chain tightness chainsaw of claim 1, wherein: the movable block (7) is movably mounted with the tensioning adjusting groove (4), and one end of the spring (6) far away from the movable block (7) is fixedly connected with one end of the tensioning adjusting groove (4).

5. The self-adjusting saw chain tightness chainsaw of claim 1, wherein: the chain wheel (2) is in transmission connection with a driving motor in the power shell (1).

6. The self-adjusting saw chain tightness chainsaw of claim 1, wherein: the chain wheel (2) and the limiting strip block (9) are positioned on the same horizontal line.