Belt wheel mechanism with brake device for mower

Abstract

The utility model discloses a belt wheel mechanism with a brake device for a mower, and relates to the technical field of mowers, the belt wheel mechanism comprises a base and a brake mechanism mounted on the base, the brake mechanism comprises a brake box fixedly connected to the base, and the inner wall of the bottom of the brake box is rotatably connected with a brake disc; two symmetrically-arranged brake assemblies are mounted on the outer wall of the top of the brake disc, two symmetrically-arranged auxiliary assemblies are mounted on the inner wall of the brake box, and a mounting opening is formed in the outer wall of the top of the brake box. The brake mechanism is arranged on the base, and the brake disc, the brake assembly and the fixing column in the brake mechanism are matched, so that the auxiliary cutting disc is conveniently braked, and meanwhile, the brake assembly on the brake disc brakes the brake disc when the brake disc rotates at a low speed; the problem that an existing mowing machine braking mode easily causes safety accidents is solved.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and in particular to a pulley mechanism with a braking device for a lawnmower. Background Technology

[0002] A lawnmower, also known as a lawn trimmer, lawn mower, or lawn mower, is a mechanical tool used for trimming lawns and vegetation. It consists of a cutter head, engine, wheels, a drive mechanism, blades, a handle, and a control unit. The cutter head is mounted on the wheels, and the engine is mounted on the cutter head. The blades are mounted on the engine's output shaft. The high-speed rotation of the blades, powered by the engine, significantly increases the speed of lawn mowing, saving workers' time and reducing manpower.

[0003] The conventional practice for existing lawnmowers is to apply a reverse current or generate a reverse magnetic field to the motor windings at the moment of power failure. Both reverse current and reverse magnetic field can generate huge sparks, which can easily lead to safety accidents. Utility Model Content

[0004] In order to improve the problem that existing lawnmower braking methods are prone to causing safety accidents, this application provides a pulley mechanism with a braking device for lawnmowers.

[0005] This application provides a pulley mechanism with a braking device for a lawnmower, including a base and a braking mechanism mounted on the base. The braking mechanism includes a brake box fixedly connected to the base, and a brake disc rotatably connected to the inner wall of the bottom of the brake box. Two symmetrically arranged brake assemblies are mounted on the outer wall of the top of the brake disc. Two symmetrically arranged auxiliary assemblies are mounted on the inner wall of the brake box. An installation opening is provided on the outer wall of the top of the brake box, and a cover plate is fixedly connected to the inner wall of the installation opening. A fixing post matching the two brake assemblies is fixedly connected to the outer wall of the bottom of the cover plate.

[0006] By adopting the above structure, a braking mechanism is set on the base, and two symmetrically arranged braking components are set on the brake disc in the braking mechanism. The cooperation between the braking components and the fixed column facilitates the braking of the auxiliary brake disc. The setting of the auxiliary components facilitates the stable rotation of the auxiliary brake disc and avoids the brake disc from shaking.

[0007] The brake assembly includes a housing fixedly connected to the brake disc, and a connecting arm is rotatably connected to the top outer wall of the housing. One end of the connecting arm is fixedly connected to a brake seat that contacts a fixed post.

[0008] By adopting the above structure, a rotatably mounted connecting arm is provided on the brake disc. The connecting arm drives the brake seat and the fixed column to contact each other, and the friction between the brake seat and the fixed column assists the brake disc in braking.

[0009] The bottom inner wall of the chassis is rotatably connected to a gear, and one end of the gear drive shaft is fixedly connected to the connecting arm.

[0010] By adopting the above structure, the gear and the connecting arm rotate coaxially, making it convenient to drive the connecting arm to move through the rotation of the gear.

[0011] The inner wall of the chassis is fixedly connected to two symmetrically arranged mounting rods, and the outer walls of the two mounting rods are slidably connected to racks.

[0012] By adopting the above structure, the rack can be easily slidably installed by setting two mounting rods, and the two racks move synchronously towards or away from each other.

[0013] Both racks mesh with gears, and springs are fitted onto the outer walls of both mounting rods.

[0014] By adopting the above structure, the rack is supported by a spring, and the gear arrangement facilitates the synchronous rotation of the two racks.

[0015] The auxiliary component includes a mounting base fixedly connected to the inner wall of the chassis, and an auxiliary seat fixedly connected to one outer wall of the mounting base.

[0016] By adopting the above structure, the auxiliary seat can be easily installed through the mounting base.

[0017] The auxiliary seat has an arc-shaped groove on one side of its outer wall, and grooves are provided on both sides of the inner wall of the arc-shaped groove. Rolling elements are provided on the inner wall of the grooves.

[0018] By adopting the above structure, the brake disc is easily inserted through the arc-shaped groove in the auxiliary seat, and the rolling element in the groove contacts the brake disc, which facilitates auxiliary support for the brake disc.

[0019] A protective cover is fixedly connected to the bottom outer wall of the base, and a cutting blade is rotatably connected to the bottom outer wall of the protective cover. One end of the cutting blade's drive shaft is fixedly connected to the brake disc. A pulley is rotatably connected to the inner wall of the base, and the two ends of the pulley's drive shaft are respectively connected to the brake disc and the cutting blade.

[0020] By adopting the above structure, the cutting blade and brake disc are driven to rotate by the pulley, and the high-speed rotating cutting blade facilitates weeding.

[0021] In summary, the beneficial effects of this application are as follows:

[0022] 1. This application solves the problem that existing lawnmower braking methods are prone to safety accidents by setting a braking mechanism on the base, and the cooperation between the brake disc, brake assembly and fixed column in the braking mechanism facilitates the braking of the auxiliary cutting blade. At the same time, the brake assembly on the brake disc brakes the brake disc when it rotates at low speed.

[0023] 2. This application facilitates the direct drive of the connecting arm to adjust the brake seat to press against the fixed column by setting a rack, gear, and spring in the housing of the brake assembly, thereby enabling the auxiliary cutting disc to brake. Attached Figure Description

[0024] Figure 1 This is an overall schematic diagram of this application;

[0025] Figure 2 This is a schematic diagram of the base of this application;

[0026] Figure 3 This is a schematic diagram of the braking mechanism of this application;

[0027] Figure 4 This is a schematic diagram of the brake disc in this application;

[0028] Figure 5 This is a cross-sectional view of the chassis of this application;

[0029] Figure 6 This is a schematic diagram of an existing lawnmower.

[0030] Explanation of reference numerals in the attached drawings: 1. Base; 2. Protective cover; 3. Cutting blade; 4. Braking mechanism; 5. Brake box; 6. Brake disc; 7. Brake assembly; 8. Cover plate; 9. Fixing column; 10. Auxiliary assembly; 11. Chassis; 12. Connecting arm; 13. Brake seat; 14. Mounting seat; 15. Auxiliary seat; 16. Gear; 17. Mounting rod; 18. Spring; 19. Rack; 20. Pulley 1; 21. Frame; 22. Motor; 23. Blade; 24. Belt. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0032] Please see Figure 1-3A pulley mechanism with a braking device for a lawnmower includes a base 1 and a braking mechanism 4 mounted on the base 1. The braking mechanism 4 is designed to facilitate braking when the lawnmower stops. The braking mechanism 4 includes a brake box 5 fixedly connected to the base 1, and a brake disc 6 rotatably connected to the bottom inner wall of the brake box 5. Two symmetrically arranged brake assemblies 7 are mounted on the top outer wall of the brake disc 6. The brake assemblies 7 are centrally symmetrically arranged on the brake disc 6. Two symmetrically arranged auxiliary assemblies 10 are mounted on the inner wall of the brake box 5. The auxiliary assemblies 10 facilitate the stable rotation of the brake disc 6. An installation opening is provided on the top outer wall of the brake box 5, and a cover plate 8 is fixedly connected to the inner wall of the installation opening. A fixing post 9 matching the two brake assemblies 7 is fixedly connected to the bottom outer wall of the cover plate 8.

[0033] In use, a braking mechanism 4 is set on the base 1. Two symmetrically arranged braking components 7 are set on the brake disc 6 in the braking mechanism 4. The cooperation between the brake components 7 and the fixed column 9 facilitates the braking of the auxiliary brake disc 6. The setting of the auxiliary components 10 facilitates the stable rotation of the auxiliary brake disc 6 and avoids the brake disc 6 from shaking.

[0034] Reference Figure 3-5 The brake assembly 7 includes a housing 11 fixedly connected to the brake disc 6, and a connecting arm 12 rotatably connected to the top outer wall of the housing 11. One end of the connecting arm 12 is fixedly connected to a brake seat 13 that contacts the fixed post 9. By setting the connecting arm 12 rotatably mounted on the brake disc 6, the connecting arm 12 drives the brake seat 13 to contact the fixed post 9. The friction between the brake seat 13 and the fixed post 9 assists the brake disc 6 in braking. A gear 16 is rotatably connected to the bottom inner wall of the housing 11, and one end of the gear 16 drive shaft is fixedly connected to the connecting arm 12. The gear 16 and the connecting arm 12 rotate coaxially, which facilitates the movement of the connecting arm 12 by the rotation of the gear 16.

[0035] Reference Figure 4 and Figure 5 The inner wall of the chassis 11 is fixedly connected to two symmetrically arranged mounting rods 17, and the outer walls of the two mounting rods 17 are slidably connected to racks 19. The two mounting rods 17 facilitate the sliding installation of racks 19, and the two racks 19 move synchronously towards or away from each other. Both racks 19 mesh with gears 16. The outer walls of the two mounting rods 17 are fitted with springs 18, which support the racks 19. The gears 16 facilitate the synchronous rotation of the two racks 19.

[0036] Reference Figure 3-4The auxiliary component 10 includes a mounting base 14 fixedly connected to the inner wall of the chassis 11, and an auxiliary seat 15 fixedly connected to one outer wall of the mounting base 14. The mounting base 14 facilitates the installation of the auxiliary seat 15. An arc-shaped groove is provided on one outer wall of the auxiliary seat 15, and grooves are provided on both inner walls of the arc-shaped groove. Rolling elements are provided on the inner walls of the grooves. The arc-shaped groove in the auxiliary seat 15 facilitates the insertion of the brake disc 6. The rolling elements in the grooves contact the brake disc 6, which facilitates the auxiliary support of the brake disc 6.

[0037] Reference Figure 1 and Figure 2 A protective cover 2 is fixedly connected to the bottom outer wall of the base 1, and a cutting blade 3 is rotatably connected to the bottom outer wall of the protective cover 2. One end of the drive shaft of the cutting blade 3 is fixedly connected to the brake disc 6. A pulley 20 is rotatably connected to the inner wall of the base 1, and the two ends of the drive shaft of the pulley 20 are respectively connected to the brake disc 6 and the cutting blade 3. The pulley 20 drives the cutting blade 3 and the brake disc 6 to rotate. The high-speed rotating cutting blade 3 facilitates weeding.

[0038] Reference Figure 6 The existing lawnmower blade drive structure mainly includes a frame 21. A second pulley is rotatably mounted on the bottom outer wall of the frame 21, and a blade 23 is fixedly connected to one end of the drive shaft of the second pulley. A motor 22 is fixedly mounted on the top outer wall of the frame 21. A third pulley is fixedly connected to the drive shaft of the motor 22. The third pulley and the second pulley are connected by the same belt 24. When the motor 22 is started, it works with the belt 24 to directly drive the blade 23 to rotate at high speed for weeding.

[0039] The implementation principle of this application is as follows: In use, the drive element directly drives the pulley to rotate, thereby directly driving the cutting blade 3 to rotate at high speed. When the cutting blade 3 rotates at high speed, the brake disc 6 rotates synchronously. When the brake disc 6 rotates at high speed, under the action of centrifugal force, the brake seats 13 on the two connecting arms 12 move away from the fixed column 9. When the brake seats 13 move away from the fixed column 9, the braking effect of the brake disc 6 can be released. When the lawnmower stops, the speed of the brake disc 6 decreases. At this time, the centrifugal force gradually decreases. When the centrifugal force is less than the elastic force of the spring 18, the two springs 18 will directly push the rack 19 to rotate clockwise. When the gear 16 rotates clockwise, the connecting arm 12 drives the brake seat 13 to press against the fixed column 9. The friction between the brake seat 13 and the fixed column 9 gradually increases, thereby facilitating the braking of the cutting blade 3.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pulley mechanism with a braking device for a lawnmower, comprising a base (1) and a braking mechanism (4) mounted on the base (1), characterized in that: The braking mechanism (4) includes a brake box (5) fixedly connected to the base (1), and a brake disc (6) is rotatably connected to the bottom inner wall of the brake box (5). Two symmetrically arranged brake assemblies (7) are installed on the top outer wall of the brake disc (6). Two symmetrically arranged auxiliary assemblies (10) are installed on the inner wall of the brake box (5). An installation port is opened on the top outer wall of the brake box (5), and a cover plate (8) is fixedly connected to the inner wall of the installation port. A fixing post (9) matching the two brake assemblies (7) is fixedly connected to the bottom outer wall of the cover plate (8).

2. A pulley mechanism with a braking device for a lawnmower according to claim 1, characterized in that: The brake assembly (7) includes a housing (11) fixedly connected to the brake disc (6), and a connecting arm (12) is rotatably connected to the top outer wall of the housing (11). One end of the connecting arm (12) is fixedly connected to a brake seat (13) that contacts the fixed post (9).

3. A pulley mechanism with a braking device for a lawnmower according to claim 2, characterized in that: The bottom inner wall of the chassis (11) is rotatably connected to a gear (16), and one end of the gear (16) drive shaft is fixedly connected to the connecting arm (12).

4. A pulley mechanism with a braking device for a lawnmower according to claim 3, characterized in that: The inner wall of the chassis (11) is fixedly connected to two symmetrically arranged mounting rods (17), and the outer walls of the two mounting rods (17) are slidably connected to racks (19).

5. A pulley mechanism with a braking device for a lawnmower according to claim 4, characterized in that: Both racks (19) mesh with gears (16), and springs (18) are sleeved on the outer walls of both mounting rods (17).

6. A pulley mechanism with a braking device for a lawnmower according to claim 5, characterized in that: The auxiliary component (10) includes a mounting base (14) fixedly connected to the inner wall of the chassis (11), and an auxiliary base (15) is fixedly connected to one outer wall of the mounting base (14).

7. A pulley mechanism with a braking device for a lawnmower according to claim 6, characterized in that: The auxiliary seat (15) has an arc-shaped groove on one side of its outer wall, and grooves are provided on both sides of the inner wall of the arc-shaped groove. Rolling elements are provided on the inner wall of the grooves.

8. A pulley mechanism with a braking device for a lawnmower according to claim 7, characterized in that: The base (1) has a protective cover (2) fixedly connected to its bottom outer wall, and a cutting blade (3) is rotatably connected to the bottom outer wall of the protective cover (2). One end of the drive shaft of the cutting blade (3) is fixedly connected to the brake disc (6). The inner wall of the base (1) is rotatably connected to a pulley (20), and the two ends of the drive shaft of the pulley (20) are respectively connected to the brake disc (6) and the cutting blade (3).

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