Adjustable brake mechanism of chain saw direct drive motor

Abstract

The invention discloses an adjustable brake mechanism of a chain saw direct drive motor, which comprises a case, a brake disc is arranged at the lower end of the case, a caliper is arranged at the front end of the brake disc, a brake pad adjusting assembly is arranged at the upper end of the caliper, an inching brake assembly is arranged on the left side of the caliper, and a safety assembly is arranged in the middle of the top of the caliper. A spring is arranged between the front portion of the bottom of the calipers and the machine box, the gap between the upper brake pad and the side brake pad is accurately adjusted through the brake pad adjusting assembly, the side brake pad synchronously changes brake parameters along with the change of the rotating speed of the chain saw through the snub assembly, and when the safety assembly is triggered, the brake pad can be stopped. The brake disc is intermittently clamped and then locked, the brake disc is locked by pushing the calipers to move when a work fault occurs through the safety assembly, and the brake support is pulled to reset after braking is finished through the spring.

Description

Technical Field

[0001] This invention relates to the field of adjustable braking mechanism technology, specifically to an adjustable braking mechanism for a chainsaw direct drive motor. Background Technology

[0002] The adjustable braking mechanism of the direct drive motor of a chainsaw is the core device to ensure the safety of chainsaw operation. It quickly cuts off the power transmission and brakes the chain in case of emergencies through mechanical or electromechanical means to avoid injury to the user. Based on the structural characteristics of the direct drive motor, this type of braking mechanism needs to take into account the response speed, braking reliability and structural compactness. At present, the mainstream design is mainly mechanical braking.

[0003] However, existing chainsaw braking mechanisms, when used in emergency braking, will pull the baffle towards the chainsaw chain, triggering the brake band to lock onto the brake disc and achieve a braking effect. However, the gap between the brake band and the brake disc is uncontrollable, and the braking force and response time are fixed, making it inconvenient to dynamically adjust according to load or speed. The friction between the brake band and the brake disc generates a lot of heat, and the belt has poor heat dissipation capacity. After long-term use, the belt will deform due to repeated stretching, and the brake disc may also undergo elliptical deformation due to uneven heating, ultimately requiring replacement and increasing maintenance costs.

[0004] To address the aforementioned issues, there is an urgent need for innovative design based on the adjustable braking mechanism of the existing chainsaw direct drive motor. Summary of the Invention

[0005] The purpose of this invention is to provide an adjustable braking mechanism for a chainsaw direct drive motor, so as to solve the problem of adjustable braking mechanisms for chainsaw direct drive motors mentioned in the background art. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable braking mechanism for a chainsaw direct drive motor, comprising a housing, a brake disc at the lower end of the housing, a caliper at the front end of the brake disc, a brake pad adjustment assembly at the upper end of the caliper, a point braking assembly at the left side of the caliper, a safety assembly at the top center of the caliper, a spring between the bottom front of the caliper and the housing, the caliper including a brake bracket, the brake bracket being rotatably mounted on the inner wall of the housing via a rotating shaft, an upper brake pad at the upper end of the cavity of the brake bracket, and side brake pads on the left and right sides of the cavity of the brake bracket.

[0007] Preferably, the brake pad adjusting assembly includes a screw, which is inclined and extends through the upper front side of the housing. A support block extends through the middle of the screw, and connecting shafts are provided on both the left and right sides of the support block. The connecting shafts are slidably mounted on the inner wall of the housing. A first abutment block is rotatably connected to the bottom end of the screw, and the first abutment block is fixedly connected to the upper brake pad. An upper connecting block is provided at each of the left and right ends of the first abutment block. An upper piston rod is provided at the bottom end of the upper connecting block, and an upper hydraulic tank extends through the bottom end of the upper piston rod. A hose is provided in the middle of the upper hydraulic tank, and a side hydraulic tank is provided at the other end of the hose. A side piston rod extends through the interior of the side hydraulic tank, and a side connecting block is provided at the end of the side piston rod. The side connecting block is fixedly connected to the side brake pad.

[0008] Preferably, the upper hydraulic tank is provided with an upper piston inside, and the bottom end of the upper piston rod is fixedly connected to the upper piston. The side hydraulic tank is provided with a side piston inside, and the end of the side piston rod is fixedly connected to the side piston.

[0009] Preferably, the intermittent braking assembly includes an abutment joint, which is fixedly installed on the top of the side hydraulic tank. The top of the abutment joint abuts against an abutment post, and the abutment post is provided with an abutment block two. An electric push rod is provided at the left end of the abutment block two, and the top of the abutment joint penetrates through the outer wall of the brake bracket.

[0010] Preferably, the abutting post and the abutting block are designed with an arc shape, and the abutting posts are distributed at equal angles.

[0011] Preferably, the safety assembly includes an abutment rod, which is fixedly installed on the top outer wall of the brake bracket. An abutment strip is abutted to the top of the abutment rod, a connecting post is fixed to the top of the abutment strip, and a baffle is fixed to the top of the connecting post. The connecting post is rotatably installed inside the chassis.

[0012] Preferably, the baffle has an arc-shaped structure, and the abutment strip has a "J" structure.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention precisely controls the displacement of the first abutment block by rotating an inclined screw, thereby causing the upper brake pad to make minor up-and-down adjustments. Simultaneously, the hydraulic transmission structure composed of the upper hydraulic tank, hose, and side hydraulic tank can synchronously transmit the adjustment force of the screw to the side brake pad, achieving uniform adjustment of the contact gap between the upper and side brake pads and the brake disc. This avoids braking delay caused by excessive gap and prevents frictional loss in non-braking states caused by insufficient gap. Furthermore, during operation, the position of the abutment post and the second abutment block can be changed by adjusting the speed of the chainsaw, thereby enhancing braking strength.

[0014] 2. This invention, by simultaneously configuring upper and side brake pads on the brake bracket, forms an "upper + left and right" encircling braking structure. Compared with the traditional single brake pad design, this increases the braking contact area, shortens the braking response time, and can quickly cut off power transmission when the motor is running at high speed, avoiding the risk of cuts caused by the chain's continuous rotation due to inertia. At the same time, the abutment joint and abutment post of the intermittent braking component cooperate to provide "intermittent" braking operation, avoiding prolonged operation of the brake pads and extending their lifespan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the caliper structure of the present invention; Figure 3 This is a schematic diagram of the brake pad adjustment assembly structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the brake pad adjustment assembly structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the hydraulic tank structure of the present invention; Figure 6 This is a schematic diagram of the point brake assembly of the present invention; Figure 7 This is a schematic diagram of the insurance component structure of the present invention.

[0016] In the diagram: 1. Chassis; 2. Brake disc; 3. Caliper; 4. Brake pad adjustment assembly; 5. Intermittent braking assembly; 6. Safety assembly; 7. Spring; 31. Brake bracket; 32. Upper brake pad; 33. Side brake pad; 34. Rotating shaft; 41. Screw; 42. Support block; 43. Connecting shaft; 44. Abutment block one; 45. Upper connecting block; 46. Upper piston rod; 47. Upper hydraulic tank; 48. Hoses; 49. Side hydraulic tank; 410. Side piston rod; 411. Side connecting block; 412. Upper piston; 413. Side piston; 51. Abutment joint; 52. Abutment post; 53. Abutment block two; 54. Electric push rod; 61. Abutment rod; 62. Abutment strip; 63. Connecting post; 64. Baffle. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7The present invention provides a technical solution: an adjustable braking mechanism for a chainsaw direct drive motor, including a housing 1, a brake disc 2 at the lower end of the housing 1, a caliper 3 at the front end of the brake disc 2, a brake pad adjustment assembly 4 at the upper end of the caliper 3, a point braking assembly 5 on the left side of the caliper 3, a safety assembly 6 at the top center of the caliper 3, and a spring 7 between the bottom front of the caliper 3 and the housing 1. The caliper 3 includes a brake bracket 31, which is rotatably mounted on the inner wall of the housing 1 via a rotating shaft 34. An upper brake pad 32 is provided at the upper end of the cavity of the brake bracket 31, and side brake pads 33 are provided on the left and right sides of the cavity of the brake bracket 31.

[0019] Please see Figure 3 The brake pad adjustment assembly 4 includes a screw 41, which is inclined and passes through the upper front side of the housing 1. A support block 42 passes through the middle of the screw 41. A connecting shaft 43 is provided on each of the left and right sides of the support block 42. The connecting shaft 43 is slidably installed on the inner wall of the housing 1. A first abutment block 44 is rotatably connected to the bottom end of the screw 41. The first abutment block 44 is fixedly connected to the upper brake pad 32. An upper connecting block 45 is provided at each of the left and right ends of the first abutment block 44. An upper piston rod 46 is provided at the bottom end of the upper connecting block 45. An upper hydraulic tank 47 passes through the bottom end of the upper piston rod 46. A hose 48 is provided in the middle of the upper hydraulic tank 47. A side hydraulic tank 49 is provided at the other end of the hose 48. A side piston rod 410 passes through the inside of the side hydraulic tank 49. A side connecting block 411 is provided at the end of the side piston rod 410. The side connecting block 411 is fixedly connected to the side brake pad 33.

[0020] Please see Figure 4 The upper hydraulic tank 47 is equipped with an upper piston 412 inside, and the bottom end of the upper piston rod 46 is fixedly connected to the upper piston 412. The side hydraulic tank 49 is equipped with a side piston 413 inside, and the end of the side piston rod 410 is fixedly connected to the side piston 413.

[0021] In one embodiment of the present invention, by rotating the screw 41, the screw 41 pushes the abutment block 44 downward through the guiding action of the support block 42 and the connecting shaft 43, causing the upper brake pad 32 to move closer to the brake disc 2. At the same time, the abutment block 44 pulls the upper piston rod 46 downward through the upper connecting block 45, and the upper piston 412 moves downward in the upper hydraulic tank 47, pressing hydraulic oil into the side hydraulic tank 49, pushing the side piston 413 and the side piston rod 410 to move horizontally, causing the side brake pad 33 to move closer to the brake disc 2.

[0022] Please see Figure 6 The point brake assembly 5 includes an abutment 51, which is fixedly installed on the top of the side hydraulic tank 49. The top of the abutment 51 abuts against an abutment post 52. The abutment post 52 is provided with an abutment block 53. An electric push rod 54 is provided on the left end of the abutment block 53. The top of the abutment 51 penetrates the outer wall of the brake bracket 31.

[0023] The abutting post 52 and the abutting block 2 53 are designed with an arc shape, and the abutting post 52 is distributed at equal angles.

[0024] As one embodiment of the present invention, the output end of the electric push rod 54 pushes the abutment post 52 and the abutment block 2 53 to move, so that the side brake pad 33 changes the braking parameters synchronously with the change of the chainsaw speed. The equal angle distribution of the abutment post 52 and the cooperation of the abutment block 2 53 make the side brake pad 33 first intermittently clamp the brake disc 2, and then lock the brake disc 2.

[0025] Please see Figure 7 The safety component 6 includes an abutment rod 61, which is fixedly installed on the top outer wall of the brake bracket 31. An abutment strip 62 is abutted on the top of the abutment rod 61. A connecting post 63 is fixed on the top of the abutment strip 62. A baffle 64 is fixed on the top of the connecting post 63. The connecting post 63 is rotatably installed inside the housing 1.

[0026] The baffle 64 has an arc-shaped structure, and the abutment strip 62 has a "J" structure.

[0027] In one embodiment of the present invention, the connecting column 63 is rotated by the baffle 64, causing the "J"-shaped abutment strip 62 to rotate around the connecting column 63 and press down on the abutment rod 61. The abutment rod 61 drives the brake bracket 31 to rotate around the rotating shaft 34, forcing the upper brake pad 32 and the side brake pad 33 to clamp the brake disc 2 to achieve locking. After the danger is eliminated, the baffle 64 is released, the spring 7 pulls the brake bracket 31 to reset, the abutment strip 62 disengages from the abutment rod 61, and the baffle 64 returns to its initial position.

[0028] Working principle: By adjusting the screw 41, the first abutment block 44 is pushed to fine-tune the upper brake pad 32. Simultaneously, the upper connecting blocks 45 at both ends of the first abutment block 44 drive the upper piston rod 46 to press the upper piston 412 in the upper hydraulic tank 47. Hydraulic oil is transmitted to the side hydraulic tank 49 through the hose 48, pushing the side piston 413 and the side piston rod 410. Through the side connecting block 411, the side brake pad 33 is driven, precisely adjusting the gap between the upper brake pad 32 and the side brake pad 33 and the brake disc 2. This avoids braking delay caused by excessive gap and friction loss in non-braking states caused by insufficient gap. The electric push rod 54 adjusts the position of the abutment post 52 and the second abutment block 53. The braking parameters are adjusted by the different speeds of the direct drive motor. At the same time, the cooperation between the abutment joint 51 and the abutment post 52 and the second abutment block 53 can form a "jog" action. The braking operation prevents the upper brake pads 32 and side brake pads 33 from working for extended periods, thus prolonging their lifespan. In case of a malfunction, the baffle 64 is moved towards the chainsaw chain. Through the linkage of the connecting column 63, the abutment rod 62, and the abutment strip 61, the brake bracket 31 is displaced, and the upper brake pads 32 and side brake pads 33 lock onto the brake disc 2. After braking is completed, the spring 7 pulls the brake bracket 31 to reset around the rotating shaft 34, and the upper brake pads 32 and side brake pads 33 disengage from the brake disc 2, releasing the brake.

[0029] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate orientations or positional relationships based on the accompanying drawings, and are used only for ease of description and simplification, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable braking mechanism for a chainsaw direct drive motor, comprising a housing (1), characterized in that: The lower end of the chassis (1) is provided with a brake disc (2), the front end of the brake disc (2) is provided with a caliper (3), the upper end of the caliper (3) is provided with a brake pad adjustment assembly (4), the left side of the caliper (3) is provided with a point brake assembly (5), the top middle of the caliper (3) is provided with a safety assembly (6), the bottom front of the caliper (3) is provided with a spring (7) between it and the chassis (1), the caliper (3) includes a brake bracket (31), the brake bracket (31) is rotatably mounted on the inner wall of the chassis (1) via a rotating shaft (34), the upper end of the cavity of the brake bracket (31) is provided with an upper brake pad (32), and the left and right sides of the cavity of the brake bracket (31) are each provided with a side brake pad (33).

2. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 1, characterized in that: The brake pad adjustment assembly (4) includes a screw (41), which is inclined and passes through the upper front side of the housing (1). A support block (42) passes through the middle of the screw (41). A connecting shaft (43) is provided on each of the left and right sides of the support block (42). The connecting shaft (43) is slidably installed on the inner wall of the housing (1). An abutment block (44) is rotatably connected to the bottom end of the screw (41). The abutment block (44) is fixedly connected to the upper brake pad (32). The left and right sides of the abutment block (44) are connected to the upper front side of the housing (1). Each end is provided with an upper connecting block (45), the bottom end of the upper connecting block (45) is provided with an upper piston rod (46), the bottom end of the upper piston rod (46) is provided with an upper hydraulic tank (47), the middle part of the upper hydraulic tank (47) is provided with a hose (48), the other end of the hose (48) is provided with a side hydraulic tank (49), the inside of the side hydraulic tank (49) is provided with a side piston rod (410), the end of the side piston rod (410) is provided with a side connecting block (411), and the side connecting block (411) is fixedly connected to the side brake pad (33).

3. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 2, characterized in that: The upper hydraulic tank (47) is equipped with an upper piston (412) inside, and the bottom end of the upper piston rod (46) is fixedly connected to the upper piston (412). The side hydraulic tank (49) is equipped with a side piston (413) inside, and the end of the side piston rod (410) is fixedly connected to the side piston (413).

4. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 2, characterized in that: The point brake assembly (5) includes an abutment (51), which is fixedly installed on the top of the side hydraulic tank (49). The top of the abutment (51) abuts against an abutment post (52). The abutment post (52) is provided with an abutment block two (53). The left end of the abutment block two (53) is provided with an electric push rod (54). The top of the abutment (51) penetrates the outer wall of the brake bracket (31).

5. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 4, characterized in that: The abutting post (52) and the abutting block two (53) are designed with an arc-shaped structure, and the abutting post (52) is distributed at equal angles.

6. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 1, characterized in that: The safety component (6) includes an abutment rod (61), which is fixedly installed on the top outer wall of the brake bracket (31). The top of the abutment rod (61) abuts against an abutment strip (62), and the top of the abutment strip (62) is fixed with a connecting post (63). The top of the connecting post (63) is fixed with a baffle (64), and the connecting post (63) is rotatably installed inside the chassis (1).

7. The adjustable braking mechanism for a chainsaw direct drive motor according to claim 6, characterized in that: The baffle (64) has an arc-shaped structure, and the abutment strip (62) has a "J" structure.

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