Chain saw with tensioning mechanism

Abstract

The utility model discloses a chain saw with a tensioning mechanism. The chain saw comprises a machine body, a positioning pin, a tensioning piece and a spring. A placement groove is formed in the machine body, the positioning pin is placed in the placement groove, the two ends of the positioning pin are fixed to the machine body, the tensioning piece is integrally of a Z-shaped structure, a fixing rod is arranged on one side of the tensioning piece, the fixing rod is provided with a through hole and connected with the positioning pin in a sleeved mode, and a fixing pin is arranged at the other end of the tensioning piece and fixed to a guide plate on the machine body; and one end part of the spring is matched with the shell of the machine body at the position of the placing groove in an abutting manner, and the other end of the spring is matched with the tensioning piece at the position of the through hole in an abutting manner. The technical problem solved by the technical scheme is to provide another type of tensioning mechanism.

Description

Technical Field

[0001] The utility model relates to a chain saw, in particular to a chain saw with a tensioning mechanism. Background Art

[0002] A chain saw belongs to a conventional electric tool, which is designed with components such as a saw blade and a guide plate. Currently, chain saws are all equipped with corresponding tensioning mechanisms, and the above-mentioned tensioning mechanisms come in various styles. Content of the Utility Model

[0003] The purpose of the utility model is to provide a chain saw with a tensioning mechanism, and the technical problem to be solved is: to provide another style of tensioning mechanism.

[0004] The chain saw with a tensioning mechanism includes a body, a positioning pin, a tensioning member, and a spring; there is a placement groove on the body, the positioning pin is placed in the placement groove and its two end portions are fixed to the body, the tensioning member is in an overall Z-shaped structure, one side of which is a fixed rod with a through hole sleeved on the positioning pin, and the other end portion is a fixed pin fixed to the guide plate on the body; the spring is sleeved on the positioning pin, one end portion of which is in abutting cooperation with the shell of the body at the placement groove position, and the other end is in abutting cooperation with the tensioning member at the through hole position; the fixed rod of the tensioning member is in an L-shaped structure, the L-shaped structure is designed with a transverse wall and a longitudinal wall, the fixed pin is fixed on the transverse wall, the positioning pin penetrates the longitudinal wall, the transverse wall is kept in the same direction as the spring, and the other end of the spring abuts against the longitudinal wall.

[0005] The positioning groove is designed with an elastic pressing member at the position fixed to the two end portions of the positioning pin.

[0006] The outer diameter of the fixed pin is larger than that of the positioning pin.

[0007] The width of the transverse wall corresponds to the width of the placement groove, and the outer diameter of the positioning pin is smaller than the width of the transverse wall.

[0008] The beneficial effect of the utility model is: by designing and installing a tensioning mechanism on the body, it uses elastic force to push the tensioning member towards the guide plate direction. In this way, when the guide plate needs to be tensioned, the guide plate can automatically move under the action of the spring to achieve the automatic tensioning function; by designing the placement groove, it does not occupy other spaces of the body, and at the same time, using the elastic pressing member structure designed at the corresponding position of the placement groove, it fixes the positioning pin through the second elastic force, so as to effectively fix the positioning pin and avoid movement, ensuring the stability of tensioning. Description of the Drawings

[0009] Figure 1 is a schematic diagram of the chain saw;

[0010] Figure 2 is a schematic diagram of the chain saw after removing the guide plate, with the placement groove enlarged;

[0011] Figure 3 is a schematic diagram of a tensioning mechanism;

[0012] In the figure

[0013] 1. Body, 11. Placing groove, 12. Elastic pressing member;

[0014] 2. Positioning pin;

[0015] 3. Spring;

[0016] 4. Tensioning member, 41. Fixing pin, 42. Fixing rod, 421. Longitudinal wall, 422. Transverse wall;

[0017] 5. Guide plate. Specific implementation manners

[0018] Please refer to Figures 1 to 3 , the chain saw in the figure has a unique design of another type of tensioning mechanism compared with traditional chain saws. Through this tensioning mechanism, the accurate tensioning of the guide plate 5 can be ensured, and the normal operation of the entire chain saw can be guaranteed. In practical applications, the above tensioning mechanism can be further optimized, such as optimizing the shape of the components and the structures that match each other between the components, or other components can be added and equivalent replacements can be made with existing components.

[0019] In the figure, the chain saw has a hollow groove treatment on the original body 1 to form a placing groove 11 structure similar to the Chinese character 'zhong', which is convenient for placing the entire tensioning mechanism in the placing groove 11. In order to prevent the lateral movement of the guide plate 5 from interfering with the tensioning mechanism, the above placing groove 11 is designed with a conventional elastic pressing member 12 structure that plays an elastic role at the positions fixed to the positioning pin 2, so as to prevent the tensioning mechanism from running out of the above placing groove 11.

[0020] The positioning pin 2 in the figure is an overall long cylindrical structure, and the spring 3 is a conventional cylindrical spring 3 structure. A part of the spring 3 is sleeved on the positioning pin 2 and simultaneously presses against the longitudinal wall 421 of the tensioning member 4, so that the spring 3 always drives the installation of the tensioning member 4 Figure 3The directional movement in it thus completes the pushing of the guide plate 5. In the figure, the tensioning member 4 adopts a Z-shaped overall structural design, specifically designing a fixing pin 41 and a fixing rod 42. The fixing pin 41 is of a cylindrical structure and is arranged upward. The fixing pin 41 is directly fixed in the mounting hole of the guide plate 5 to keep the fixing pin 41 and the guide plate 5 moving synchronously. The fixing rod 42 is of an L-shaped structure, designing a longitudinal wall 421 and a transverse wall 422. Among them, the transverse wall 422 is fixed to the fixing pin 41 and is horizontally aligned with the spring 3 in the same direction. The longitudinal wall 421 abuts against the spring 3 and facilitates the penetration of the positioning pin 2. In order to make the force transmission between components stable, the outer diameter of the fixing pin 41 can be designed to be larger than the outer diameter of the positioning pin 2. At the same time, the width of the transverse wall 422 is designed to correspond to the width of the placement groove 11. In addition, the outer diameter of the positioning pin 2 can also be designed to be smaller than the width of the transverse wall 422.

[0021] The specific embodiments described above are only used to explain the technical solution and are not used to limit the technical solution. In the description of the technical solution, it should be noted that terms such as "up", "inside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the technical solution 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, so it cannot be understood as a limitation of the technical solution.

[0022] At the same time, in the description of the technical solution, it should be noted that unless otherwise clearly specified and limited, terms such as "fix", "fit" 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 directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the technical solution can be understood according to specific circumstances.

[0023] Although the embodiments of the technical solution have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the technical solution. The scope of the technical solution is defined by the appended claims and their equivalents.

Claims

1. A chain saw with a tensioning mechanism, characterized in that: The invention comprises a body (1), a positioning pin (2), a tensioning member (4), and a spring (3); the body (1) is provided with a placement groove (11), the positioning pin (2) is placed in the placement groove (11) and its two ends are fixed to the body (1); the tensioning member (4) is a Z-shaped structure as a whole, one side of which is a fixing rod (42), the fixing rod (42) has a through hole and is sleeved with the positioning pin (2), and the other end is a fixing pin (41), and the fixing pin (41) is fixed to the guide plate (5) on the body (1); the spring (3) is sleeved on the positioning pin (2 ), one end of which is in abutment with the shell of the body (1) at the position of the placement slot (11), and the other end is in abutment with the tensioning member (4) at the position of the through hole; the fixing rod (42) of the tensioning member (4) is an L-shaped structure, and the L-shaped structure is designed with a transverse wall (422) and a longitudinal wall (421), the fixing pin (41) is fixed on the transverse wall (422), the positioning pin (2) passes through the longitudinal wall (421), the transverse wall (422) is kept in the same direction as the spring (3), and the other end of the spring (3) is in abutment with the longitudinal wall (421).

2. The chain saw with a tensioning mechanism according to claim 1, characterized in that: The placement groove (11) is designed with a spring-pressing piece (12) at a position fixed to both end portions of the positioning pin (2).

3. The chain saw with a tensioning mechanism according to claim 2, characterized in that: The outer diameter of the fixing pin (41) is greater than the outer diameter of the positioning pin (2).

4. The chain saw with a tensioning mechanism according to claim 3, characterized in that: The width of the transverse wall (422) corresponds to the width of the placement groove (11), and the outer diameter of the positioning pin (2) is smaller than the width of the transverse wall (422).

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