CN-116066487-B - Gear brake structure and garden instrument

CN116066487BCN 116066487 BCN116066487 BCN 116066487BCN-116066487-B

Abstract

The invention relates to a gear brake structure and a gardening tool, which comprises a motor, a gear transmission assembly, a gear brake assembly and an output shaft assembly, wherein the gear brake assembly comprises a brake pad and a brake shoe, the motor drives the gear transmission assembly to rotate, and the brake pad is automatically separated from or held tightly with the brake shoe along with the rotation or stop of the motor so as to realize the starting or braking. The braking and starting processes of the invention are automatically realized, namely, the gear braking knot is automatically loosened or locked by starting and stopping the machine, when the motor is not started, the brake pad and the brake pad are in a braking state, and when the motor is started, the brake pad is separated from the brake pad and is in a loosening state.

Inventors

WANG WEIJUN
LIU DAJUN
YU LIN
WANG JINGTIAN

Assignees

浙江亚特电器股份有限公司

Dates

Publication Date: 20260512
Application Date: 20221212

Claims (5)

1. The gear brake structure is characterized by comprising a motor, a gear transmission assembly, a gear brake assembly and an output shaft assembly, wherein the gear brake assembly comprises a brake block and a brake shoe, the motor drives the gear transmission assembly to rotate, and the brake block is automatically separated from or tightly held with the brake shoe along with the rotation or stop of the motor so as to realize the starting or braking; The motor is arranged on the motor support, the gear brake assembly is arranged between the output shaft assembly and the motor support, the brake shoe is fixed on the output shaft assembly, the gear transmission assembly comprises a pinion and a gear wheel which are mutually meshed and arranged on the motor support, the pinion is arranged on an output shaft of the motor, the gear wheel is arranged on the motor support, the output shaft assembly is arranged on the axle center of the gear wheel, the motor drives the pinion to rotate, the pinion drives the gear wheel to rotate, and the gear wheel rotates to drive the output shaft assembly to rotate; Be equipped with the subassembly that resets between output shaft assembly and the gear wheel, when the machine outage, the output shaft assembly drives the brake block under the effect of subassembly that resets in step and resets, the subassembly that resets includes the spring, the gear wheel is connected to spring one end, the output shaft assembly is connected to the spring other end, equidistant a plurality of arc installation department that are equipped with in circumference of output shaft assembly, arc installation department top is equipped with the pivot, in the pivot was located in brake block one end rotation, the brake block top is equipped with the guard plate, arc installation department bottom is equipped with the dog, the pivot dodges the setting with the dog.
2. The gear brake structure of claim 1, wherein the output shaft assembly is stationary at the moment of start when the motor is started, and the gear wheel rotates against the output shaft assembly when the gear wheel rotates by a certain angle, thereby disengaging the brake pad from the brake pad and allowing the machine to operate at high speed.
3. The gear brake structure according to claim 1, wherein the large gear is provided with a chute, a spring assembly is arranged in the chute, one end of the spring is fixed to the spring assembly, the other end of the spring is connected with a stop block, and the stop block rotates along with the output shaft assembly and slides along the chute to stretch or compress the spring.
4. The gear brake structure according to claim 3, wherein a limiting post is arranged on the large gear, a avoidance position is arranged between two adjacent arc-shaped mounting portions, and the limiting post is arranged in the avoidance position and is matched with the arc-shaped mounting portions and the brake pad for limiting when the large gear is assembled with the output shaft assembly.
5. A garden tool, characterized in that the garden tool comprises the gear brake structure as claimed in any one of claims 1-4.

Description

Gear brake structure and garden instrument Technical Field The invention relates to the technical field of garden tools, in particular to a gear brake structure and a garden tool with the gear brake structure. Background In the prior art, the brake structure of the garden tool generally adopts friction between a brake shoe and an iron sheet to realize braking, the brake mode is limited in structural products driven by a belt, more products cannot be expanded, the belt driving structure is complex, more parts are arranged, more mould fees and labor fees can be generated, the whole manufacturing cost of the machine is higher, the products have no competitiveness, the belt driving is easy to slip, the transmission ratio is not constant when the belt is elastic and is unstable when the belt slides. Disclosure of Invention The invention aims to provide a gear brake structure which has the advantages of few parts, simple and compact structure, no slipping and stable transmission. In order to achieve the aim, the gear brake structure comprises a motor, a gear transmission assembly, a gear brake assembly and an output shaft assembly, wherein the gear brake assembly comprises a brake pad and a brake shoe, the motor drives the gear transmission assembly to rotate, and the brake pad automatically breaks away from or is held tightly with the brake shoe along with the rotation or stop of the motor so as to achieve starting or braking. Preferably, the motor is arranged on the motor support, the gear brake assembly is arranged between the output shaft assembly and the motor support, the brake shoe is fixed on the motor support, and the brake shoe is fixed on the output shaft assembly. Preferably, the gear transmission assembly comprises a pinion and a large gear which are mutually meshed on the motor support, the pinion is arranged on an output shaft of the motor, the large gear is arranged on the motor support, the output shaft assembly is arranged on the axle center of the large gear, the motor drives the pinion to rotate, the pinion drives the large gear to rotate, and the large gear rotates to drive the output shaft assembly to rotate. Preferably, when the motor is started, the output shaft assembly is in a static state at the starting moment, and when the large gear rotates for a certain angle, the large gear rotates against the output shaft assembly, so that the brake pad is separated from the brake pad, and the machine runs at a high speed. Preferably, a reset component is arranged between the output shaft component and the large gear, and when the machine is powered off, the output shaft component synchronously drives the brake pad to reset under the action of the reset component. Preferably, the reset assembly comprises a spring, one end of the spring is connected with the large gear, and the other end of the spring is connected with the output shaft assembly. Preferably, a plurality of arc-shaped mounting portions are arranged at equal intervals in the circumferential direction of the output shaft assembly, a rotating shaft is arranged at the top of each arc-shaped mounting portion, one end of each brake pad is rotationally arranged on the corresponding rotating shaft, a protection plate is arranged at the top of each brake pad, a stop block is arranged at the bottom of each arc-shaped mounting portion, and the rotating shaft and the stop block are arranged in an avoidance mode. Preferably, a sliding groove is formed in the large gear, a spring assembly is arranged in the sliding groove, one end of the spring is fixed to the spring assembly, the other end of the spring is connected with a stop block, and the stop block rotates along with the output shaft assembly and slides along the sliding groove to stretch or compress the spring. Preferably, the gear wheel is provided with a limit post, and a avoidance position is arranged between two adjacent arc-shaped mounting parts, and the limit post is arranged in the avoidance position and is in limit with the arc-shaped mounting parts and the brake pad in cooperation when the gear wheel is assembled with the output shaft assembly. Another object of the present invention is to provide a gardening tool comprising the gear braking structure. After the technical scheme is adopted, the invention has the following advantages: 1. The braking and starting processes of the invention are automatic, when the motor is not started, the brake pad and the brake pad are in a braking state, and when the motor is started, the brake pad is separated from the brake pad and is in a releasing state; 2. The invention has the advantages of fewer parts, simple structure, easy assembly, reduced cost, convenient manufacture and installation, low overall cost and labor cost saving; 2. Compared with the existing transmission belt and transmission chain, the gear brake structure is not limited in transmission mode, can be widely applied to more products, and has strong universality; 3. The gear br