Chain saw brake band limiting structure

Abstract

The utility model relates to the technical field of chain saw brake bands, and discloses a chain saw brake band limiting structure which comprises a fixing block arranged on the inner side of a limiting shell, a circular frame used for supporting a brake band body and integrally formed on the inner side of the limiting shell, a first limiting block and a second limiting block arranged on the inner side of the circular frame and used for supporting the brake band body. According to the chain saw brake band limiting structure, after a brake mechanism is triggered, a brake band body can tightly hold an engine transmission structure, braking is formed, when the brake mechanism restores to the normal position, a brake band can normally return, and the brake band body can be prevented from falling off when the brake mechanism restores to the normal position. And by arranging a first limiting block and a second limiting block, the brake band body can be limited and prevented from shaking, the braking effect of the device can be improved, the position of the brake band body can be limited, stable operation of the brake mechanism can be guaranteed, and the safety of a machine is improved on the premise that the performance of the machine is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of chainsaw brake band technology, specifically a chainsaw brake band limiting structure. Background Technology

[0002] A chainsaw is a garden tool that uses an electric motor or engine as its power source, a braking system as its safety protection system, and a guide chain as its cutting attachment. Its main components include a generator system or engine system, a braking system, and cutting attachments. Garden tools and chainsaws have a wide range of uses, including forest logging, timber processing, branch pruning, timber processing in timber yards, and sawing of railway sleepers. At present, it has become the dominant handheld logging machine in my country's forest areas. It can also be used for pruning large trees, extracting large timbers, and accident rescue.

[0003] The braking mechanism is an important part of the safety function of a handheld chainsaw. The drawback of the existing technology is that the brake band is in a free-moving state in the braking mechanism. After the braking mechanism is triggered, the brake band will grip the engine transmission structure to form a brake. When the braking mechanism returns to the normal position, the brake band will return to its normal position. However, the position of the brake band will move up and down. The change in the position of the brake band will affect the performance of the braking mechanism, and the braking time will change accordingly, affecting the performance of the machine. Braking failure can cause personal injury. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a chainsaw brake band limiting structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a chainsaw brake band limiting structure, comprising:

[0006] A limiting housing is used to support the limiting structure, and the limiting housing is made of high-strength hard plastic material for support;

[0007] A pivot shaft is used to support the handle, and the pivot shaft is rotatably connected inside the limiting housing.

[0008] A handle is used for brake limiting, and the handle is fixedly sleeved on the outside of the rotating shaft;

[0009] A brake groove is provided inside the limiting housing for placing brake pads;

[0010] A brake band body for braking, wherein the brake band body is disposed inside the brake groove;

[0011] A square hole is provided for connecting the handle, and the square hole is provided at one end of the brake band body near the handle;

[0012] A circular hole is used to fix the brake band body, and the circular hole is opened at the end of the brake band body away from the handle;

[0013] A guide plate is used to guide the main body of the brake band, and the guide plate is disposed inside the limiting housing;

[0014] A fixing block is used to fix the brake band body, and the fixing block is disposed on the inner side of the limiting housing;

[0015] A circular frame is used to support the main body of the brake band, and the circular frame is integrally formed on the inner side of the limiting shell;

[0016] At least two limiting blocks one and at least one limiting block two are provided, the limiting blocks one and the limiting blocks two are both provided on the inner side of the circular frame, and the two limiting blocks one are symmetrically arranged on both sides of the limiting block two. The limiting blocks one and the limiting blocks two are both provided with steps.

[0017] Preferably, the fixing block is arc-shaped on the side near the brake band body, and a groove is provided on the outer side of the fixing block for fixing the brake band body.

[0018] Preferably, the right side of the guide plate is triangular, and the side of the guide plate closest to the brake band body is arc-shaped.

[0019] Preferably, the inner side of the limiting block two is provided with a sliding groove, and the concave surface of the sliding groove is set at the same horizontal plane as the inner side of the circular frame.

[0020] Preferably, a single-sided groove is provided on the inner side of each of the two limiting blocks, and the lateral width of the groove is greater than the width of the brake band body.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. The chainsaw brake band limiting structure, after being triggered by the brake mechanism, causes the brake band body to grip the engine transmission structure, forming a brake. When the brake mechanism returns to its normal position, the brake band will return to its normal position. The setting of limiting block one and limiting block two can limit the brake band body, prevent the brake band body from shaking, improve the braking effect of the device, limit the position of the brake band body to ensure the stable operation of the brake mechanism, and improve the safety of the machine while ensuring machine performance.

[0023] 2. The chainsaw brake band limiting structure adds limiting block one and limiting block two inside the circular frame. Limiting block one and limiting block two are provided with upper and lower steps. By setting the upper and lower steps, the position of the brake band body is limited. By adding steps above and below the installation position of the brake band body, it can be ensured that the brake band body is in the same position whether in the free state or the triggered state. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the present utility model;

[0025] Figure 2 This is a side view of the structure of this utility model;

[0026] Figure 3 The structure of this utility model Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 The structure of this utility model Figure 2 Enlarged view of point B in the middle;

[0028] Figure 5 This is a three-dimensional schematic diagram of the brake band of this utility model.

[0029] In the diagram: 1. Limiting housing; 2. Rotating shaft; 3. Handle; 4. Brake groove; 5. Brake band body; 6. Square hole; 7. Circular hole; 8. Fixing block; 9. Guide plate; 10. Circular frame; 11. Limiting block one; 12. Limiting block two. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Example:

[0032] Please refer to Figures 1-5.

[0033] A chainsaw brake band limiting structure includes:

[0034] Limiting housing 1 is used to support the limiting structure. Limiting housing 1 is made of high-strength hard plastic material for support.

[0035] Rotating shaft 2 is used to support handle 3, and rotating shaft 2 is rotatably connected inside limiting housing 1;

[0036] Handle 3 is used for brake limiting and is fixedly sleeved on the outside of the rotating shaft 2;

[0037] Brake groove 4 is used to place brake pads; the limit housing 1 has a brake groove 4 inside.

[0038] Brake band body 5, used for braking, is located inside the brake groove 4;

[0039] A square hole 6 is used to connect the handle 3. The square hole 6 is opened at one end of the brake band body 5 near the handle 3.

[0040] A circular hole 7 is used to fix the brake band body 5. The circular hole 7 is opened at the end of the brake band body 5 away from the handle 3.

[0041] Guide plate 9 is used to guide the brake band body 5. Guide plate 9 is set inside the limiting housing 1.

[0042] The fixing block 8 is used to fix the brake band body 5. The fixing block 8 is set inside the limiting housing 1.

[0043] A circular frame 10 is used to support the brake band body 5. The circular frame 10 is integrally formed on the inner side of the limiting housing 1.

[0044] At least two limiting blocks 11 and at least one limiting block 2 12 are provided. Both limiting blocks 11 and limiting blocks 2 12 are provided inside the circular frame 10, and the two limiting blocks 11 are symmetrically provided on both sides of the limiting block 2 12. Both limiting blocks 11 and limiting blocks 2 12 are provided with steps.

[0045] Specifically, the fixed end of the brake band body 5 is fitted onto the fixed block 8, and then a bolt is used to fix the fixed end of the brake band body 5 through the circular hole 7. Then, the end of the brake band body 5 away from the fixed block 8 is fixed to the handle 3. When braking is needed, the handle 3 is moved, causing the handle 3 to drive the rotating shaft 2 to rotate. At this time, the brake band body 5 is tightened. After the braking mechanism is triggered, the brake band body 5 will grip the engine transmission structure to form a brake. When the braking mechanism returns to the normal position, the brake band will return to its normal position. The setting of limit block 11 and limit block 22 can limit the brake band body 5 to prevent the brake band body 5 from shaking, which can improve the braking effect of the device.

[0046] It can limit the position of the brake band body 5 to ensure the stable operation of the braking mechanism, thereby improving the safety of the machine while ensuring its performance.

[0047] Inside the circular frame 10, limit block 11 and limit block 2 12 are added. Upper and lower steps are set on limit block 11 and limit block 2 12. The position of the brake band body 5 is restricted by setting upper and lower steps. By adding steps above and below the installation position of the brake band body 5, it can be ensured that the brake band body 5 is in the same position whether in the free state or the triggered state.

[0048] In the embodiment: the fixing block 8 is arc-shaped on the side near the brake band body 5, and a groove is provided on the outer side of the fixing block 8 for fixing the brake band body 5;

[0049] Specifically, the fixing block 8 is arc-shaped on the side near the brake band body 5, which can better fit the fixing end of the brake band body 5 and be tightened with bolts to achieve the effect of fixing one end of the brake band body 5. The outer side of the fixing block 8 is provided with a groove, which can be used to fix the brake band body 5 to achieve the effect of fixing the fixing end of the brake band body 5.

[0050] In the embodiment: the right side of the guide plate 9 is triangular, and the side of the guide plate 9 near the brake band body 5 is arc-shaped;

[0051] Specifically, the right side of the guide plate 9 is triangular, which can guide the brake band body 5. The side of the guide plate 9 closest to the brake band body 5 is arc-shaped, which can stabilize the movement of the brake band body 5 and guide the movement of the brake band body 5.

[0052] In the embodiment: a sliding groove is provided on the inner side of the limiting block 2 12, and the concave surface of the sliding groove is set at the same horizontal plane as the inner side of the circular frame 10.

[0053] Specifically, the groove opened on the inner side of the limiting block 2 12 is used to place the brake band body 5 and can limit the brake band body 5. The concave surface of the groove is set at the same level as the inner side of the circular frame 10, which can facilitate the placement of the brake band body 5.

[0054] In the embodiment: a single-sided groove is provided on the inner side of each of the two limiting blocks 11, and the lateral width of the groove is greater than the width of the brake band body 5.

[0055] Specifically, the inner side of the limiting block 11 is provided with a single-sided groove, which facilitates the placement of the brake band body 5 and can limit the movement direction of the brake band body 5. The sliding groove is used to place the brake band body 5 and can limit the position of the brake band body 5.

[0056] Working principle: After the braking mechanism is triggered, the brake band body 5 will grip the engine transmission structure to form a brake. When the braking mechanism returns to the normal position, the brake band will return to its normal position. The setting of limit block 11 and limit block 22 can limit the brake band body 5 to prevent the brake band body 5 from shaking, which can improve the braking effect of the device.

[0057] It can limit the position of the brake band body 5 to ensure the stable operation of the braking mechanism, thereby improving the safety of the machine while ensuring its performance.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chainsaw brake band limiting structure, characterized in that, include: A limiting housing (1) is used to support the limiting structure. The limiting housing (1) is made of high-strength hard plastic material. A rotating shaft (2) is used to support the handle (3), and the rotating shaft (2) is rotatably connected inside the limiting housing (1); A handle (3) is used for brake limiting, and the handle (3) is fixedly sleeved on the outside of the rotating shaft (2); Brake groove (4) is used to place brake pads. The limit housing (1) has a brake groove (4) inside. Brake band body (5) is used for braking, and the brake band body (5) is disposed inside the brake groove (4); A square hole (6) is provided for connecting the handle (3). The square hole (6) is provided at one end of the brake band body (5) near the handle (3). A circular hole (7) is used to fix the brake band body (5), and the circular hole (7) is opened at the end of the brake band body (5) away from the handle (3); A guide plate (9) is used to guide the brake band body (5), and the guide plate (9) is disposed on the inner side of the limiting housing (1); A fixing block (8) is used to fix the brake band body (5), and the fixing block (8) is set inside the limiting housing (1); A circular frame (10) is used to support the brake band body (5), and the circular frame (10) is integrally formed on the inner side of the limiting shell (1); At least two limiting blocks one (11) and at least one limiting block two (12) are provided on the inner side of the circular frame (10), and the two limiting blocks one (11) are symmetrically arranged on both sides of the limiting block two (12). Both the limiting blocks one (11) and the limiting blocks two (12) are provided with steps.

2. The chainsaw brake band limiting structure according to claim 1, characterized in that: The fixing block (8) is arc-shaped on the side near the brake band body (5), and a groove is provided on the outer side of the fixing block (8) for fixing the brake band body (5).

3. The chainsaw brake band limiting structure according to claim 1, characterized in that: The right side of the guide plate (9) is triangular, and the side of the guide plate (9) near the brake band body (5) is arc-shaped.

4. The chainsaw brake band limiting structure according to claim 1, characterized in that: The inner side of the limiting block 2 (12) is provided with a sliding groove, and the concave surface of the sliding groove is set at the same level as the inner side of the circular frame (10).

5. A chainsaw brake band limiting structure according to claim 4, characterized in that: Both of the limiting blocks (11) have a single-sided groove on their inner sides, and the lateral width of the groove is greater than the width of the brake band body (5).

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