CN219176819U - Gear brake structure and garden instrument - Google Patents

Abstract

The utility model 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 utility model 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.

Description

A gear brake structure and garden tool

technical field

The utility model 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 technique

The braking structure of garden tools in the prior art generally uses the friction between the brake pads and the iron sheet to achieve braking. This braking method is limited to structural products driven by belts, and more products cannot be expanded. The structure of belt transmission is complicated, and the parts Too much will generate more mold costs and labor costs, which will make the overall cost of the machine higher, resulting in uncompetitive products, and the belt drive is easy to slip. When the belt is elastic, the transmission ratio is not constant when it slides, and the transmission is not stable enough. .

Utility model content

The purpose of the utility model is to provide a gear brake structure with few parts, simple and compact structure, no slipping and stable transmission.

In order to achieve the above object, the utility model adopts the following technical solutions: a gear brake structure, including a motor, a gear transmission assembly, a gear brake assembly and an output shaft assembly, the gear brake assembly includes brake pads and brake shoes, and the motor drives The gear transmission assembly rotates, and the brake pads are automatically disengaged from or tightened with the brake pads as the motor rotates or stops, so as to realize starting or braking.

Preferably, the motor is arranged on the motor bracket, the gear brake assembly is arranged between the output shaft assembly and the motor bracket, the brake shoes are fixed on the motor bracket, and the brake pads are fixed on the output shaft assembly.

Preferably, the gear transmission assembly includes a pinion gear and a bull gear that are arranged on the motor bracket and engage with each other, the pinion gear is arranged on the output shaft of the motor, the bull gear is arranged on the motor bracket, and the output shaft assembly It is arranged on the shaft center of the large gear, the motor drives the pinion to rotate, the pinion drives the large gear to rotate, and the rotation of the large gear drives the output shaft assembly to rotate.

Preferably, when the motor starts, the output shaft assembly is in a static state at the moment of starting, and when the large gear rotates at a certain angle, the large gear rotates against the output shaft assembly, so that the brake pads are separated from the brake pads, and the machine runs at high speed .

Preferably, a reset assembly is provided between the output shaft assembly and the bull gear, and when the machine is powered off, the output shaft assembly synchronously drives the brake pads to reset under the action of the reset assembly.

Preferably, the reset assembly includes a spring, one end of the spring is connected to the large gear, and the other end of the spring is connected to the output shaft assembly.

As a preference, several arc-shaped mounting parts are arranged at equal intervals in the circumferential direction of the output shaft assembly, and a rotating shaft is arranged on the top of the arc-shaped installing part, and one end of the brake pad is rotated on the rotating shaft, and the top of the brake pad is provided with As for the protective plate, a stopper is provided at the bottom of the arc-shaped installation part, and the rotating shaft and the stopper are avoided.

As a preference, a chute is provided on the large gear, and a spring assembly position is provided in the chute, one end of the spring is fixed at the spring assembly position, and the other end of the spring is connected to a stopper, and the stopper is connected with the output shaft The assembly rotates and slides along the chute to stretch or compress the spring.

As a preference, a limit post is provided on the large gear, and an avoidance position is provided between two adjacent arc-shaped installation parts. When the large gear and the output shaft assembly are assembled, the limit post is set at the avoidance position , Cooperate with the arc-shaped installation part and the brake pad to limit the position.

Another object of the present utility model is to provide a garden tool, which includes the above-mentioned gear brake structure.

After adopting the above technical scheme, the utility model has the following advantages:

1. The process of braking and starting of the utility model is automatic. When the motor is not started, the brake pads and brake pads are in a braking state. When the motor is started, the brake pads are separated from the brake pads and are in a loose state;

2. The utility model has few parts, simple structure, easy assembly, reduced cost, convenient manufacture and installation, and low overall cost, while saving labor costs;

2. The utility model adopts a gear brake structure. Compared with the existing transmission belt and transmission chain, the transmission mode is not limited, and it can be widely applied to more products and has strong versatility;

3. The braking function of the gear brake assembly of the utility model is stable, and a protective plate is also set on the brake pad, which effectively prevents the brake pad from moving up and down during work;

4. The utility model has stable structure, high transmission precision, wider application range, high transmission efficiency, strong vibration damping and impact resistance, not easy to slip, stable and reliable work, and longer service life.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a schematic diagram of an axial section of Embodiment 1 of the present utility model;

Fig. 2 is the explosion schematic diagram of the utility model embodiment one;

Fig. 3 is a structural schematic diagram of a large gear in Embodiment 1 of the present utility model;

Fig. 4 is a schematic structural diagram of the output shaft assembly in Embodiment 1 of the utility model;

Fig. 5 is a schematic diagram of a brake pad and a brake pad in a tight state in Embodiment 1 of the present utility model;

Fig. 6 is a schematic diagram of the brake pads and brake pads in a loosened state in Embodiment 1 of the present utility model;

Fig. 7 is a cross-sectional view of the installation position of the gear brake assembly in the third embodiment of the utility model;

Fig. 8 is a cross-sectional view of the installation position of the gear brake assembly in Embodiment 4 of the present invention.

Reference signs:

1. Motor; 2. Motor bracket; 3. Gear transmission assembly; 31. Pinion gear; 32. Large gear; 321. Chute; 322. Spring assembly position; 323. Limiting column; 4. Gear brake assembly; 41. Brake pad; 42, brake pad; 5, output shaft assembly; 51, arc-shaped installation part; 52, rotating shaft; 53, block; 54, avoidance position; 6, spring; 7, protective plate; 8, first bearing; 9. Second bearing; 10. Third bearing; 11. Screw; 12. Fixing seat; 13. Blade; 14. Battery pack.

Detailed ways

In order to explain the overall concept of the utility model more clearly, the utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", " Words indicating orientation or positional relationship such as "top", "bottom" are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device/element must have A particular orientation or construction and operation in a particular orientation should therefore not be construed as limiting the invention.

Embodiment one

A gear brake structure, as shown in Figures 1-6, includes a motor 1, a gear transmission assembly 3, a gear brake assembly 4 and an output shaft assembly 5, and the gear brake assembly 4 includes brake pads 41 and brake shoes 42, so The motor 1 drives the gear transmission assembly 3 to rotate, and the brake pad 41 is automatically disengaged or locked from the brake shoe 42 as the motor 1 rotates or stops, so as to realize starting or braking.

In order to improve the stability of the overall mechanism, the first bearing 8 of the motor 1 is arranged on the motor bracket 2 and fixed by screws 11, and the motor bracket 2 is arranged on the fixing base 12 and fixed by screws 11. The gear transmission The component 3, the gear brake component 4 and the output shaft component 5 are assembled between the motor bracket 2 and the fixing base 12, the gear brake component 4 is set between the output shaft component 5 and the motor bracket 2, and the brake shoe 42 is fixed On the motor bracket 2 , the brake pad 41 is fixed on the output shaft assembly 5 .

In order to simplify the structure and facilitate assembly, the gear transmission assembly 3 includes a pinion 31 and a bull gear 32 that are arranged on the motor bracket 2 and mesh with each other, the pinion 31 is arranged on the output shaft of the motor 1, and the bull gear 32 Set on the motor bracket 2, the output shaft assembly 5 is set on the axis of the bull gear 32, the motor 1 drives the pinion 31 to rotate, the pinion 31 drives the bull gear 32 to rotate, and the bull gear 32 rotates to drive the output The shaft assembly 5 rotates, and the two ends of the output shaft assembly 5 are respectively arranged on the motor bracket 2 and the fixing base 12 through the second bearing 9 and the third bearing 10 .

Compared with the existing transmission belt and transmission chain, the utility model adopts the gear transmission assembly 3. Compared with the existing transmission belt and transmission chain, the transmission precision is high, the application range is wider, the accessories are relatively reduced, the cost is reduced, the manufacturing and installation are convenient, the transmission efficiency is high, and it has a strong Excellent vibration damping and impact resistance, not easy to slip, more reliable work, and long service life.

In order to facilitate automatic reset after braking, a reset assembly is provided between the output shaft assembly 5 and the large gear 32. When the machine is powered off, the output shaft assembly 5 synchronously drives the brake pads 41 to reset under the action of the reset assembly. The reset assembly includes a spring 6 , one end of the spring 6 is connected to the bull gear 32 , and the other end of the spring 6 is connected to the output shaft assembly 5 . In practical applications, the spring 6 can also be equivalently replaced by similar accessories such as elastic sheets.

In order to facilitate assembly, the output shaft assembly 5 is provided with a number of arc-shaped installation parts 51 at equal intervals in the circumferential direction, and the top of the arc-shaped installation part 51 is provided with a rotating shaft 52, and one end of the brake pad 41 is rotated on the rotating shaft 52, so that The top of the brake pad 41 is provided with a protective plate 7, and the protective plate 7 is fixed on the output shaft assembly 5 by screws 11, and the bottom of the arc-shaped installation part 51 is provided with a stopper 53, and the rotating shaft 52 and the stopper 53 adopt Avoid setting. Wherein, the setting of the protective plate 7 effectively prevents the brake pad 41 from moving up and down.

The bull gear 32 is provided with a chute 321, the chute 321 is provided with a spring assembly position 322, one end of the spring 6 is fixed to the spring assembly position 322, and the other end of the spring 6 is connected to a stopper 53, the stopper 53 rotates with the output shaft assembly 5 and slides along the chute 321 to stretch or compress the spring 6 . An avoidance position 54 is provided between two adjacent arc-shaped installation parts 51. When the large gear 32 is assembled with the output shaft assembly 5, the limit post 323 is set at the avoidance position 54, and the avoidance position 54 is in line with the arc shape. The installation part 51 and the brake pad 41 cooperate to limit.

Braking method:

When the motor 1 is not started, the brake pads 41 and the brake shoes 42 are in a braking state tightly.

When the motor 1 starts, at the moment of starting, the output shaft of the motor 1 drives the pinion 31 to rotate, the pinion 31 rotates to drive the large gear 32 to rotate, and the large gear 32 rotates to drive the output shaft assembly 5 to rotate. At this time, the output shaft assembly 5 is due to Under the combined action of the gravity of the blade, the pressure of the protective plate 7, and the friction between the brake pad 41 and the brake shoe 42, the output shaft assembly 5 is in a static state; when the large gear 32 rotates at a certain angle, the large gear 32 withstands the output The shaft assembly 5 rotates so that the brake pads 41 break away from the brake shoes 42, and the machine runs at a high speed.

When the motor 1 is powered off, the output shaft assembly 5 will return the output shaft assembly 5 due to the pressure of the spring 6, thereby causing the brake pad 41 to return. At this time, the brake pad 41 will be pressed by the limit post 323, Withstand the brake shoe 42, thereby realize braking.

Embodiment two

Another object of the present utility model is to provide a garden tool, which includes the above-mentioned gear brake structure.

For other content not described in this embodiment, reference may be made to Embodiment 1.

Embodiment three

Apply the above gear brake structure to an AC lawnmower. At this time, the installation positions of the motor 1, the motor bracket 2, the gear transmission assembly 3, the gear brake assembly 4 and the blade 13 are shown in FIG. 7 .

For other content not described in this embodiment, reference may be made to Embodiment 1.

Embodiment Four

Apply the above gear brake structure to a DC lawnmower. At this time, the installation positions of the motor 1, the motor bracket 2, the gear transmission assembly 3, the gear brake assembly 4, the blade 13 and the battery pack 14 are shown in FIG. 8 .

For other content not described in this embodiment, reference may be made to Embodiment 1.

In addition to the above-mentioned preferred embodiment, the utility model also has other implementation modes, those skilled in the art can make various changes and deformations according to the utility model, as long as they do not depart from the spirit of the utility model, all should belong to the appended rights of the utility model The scope defined by the requirement.

Claims (10)

1. A gear brake structure, characterized in that: it includes a motor, a gear transmission assembly, a gear brake assembly and an output shaft assembly, the gear brake assembly includes brake pads and brake pads, the motor drives the gear transmission assembly to rotate, the With the rotation or stop of the motor, the brake pads are automatically disengaged from or tightened with the brake pads so as to realize starting or braking. 2. A gear brake structure according to claim 1, characterized in that: the motor is arranged on the motor bracket, the gear brake assembly is arranged between the output shaft assembly and the motor bracket, and the brake shoe is fixed on On the motor support, the brake pad is fixed on the output shaft assembly. 3. A gear brake structure according to claim 2, characterized in that: the gear transmission assembly includes a pinion gear and a bull gear arranged on the motor bracket and engaged with each other, and the pinion gear is arranged on the output shaft of the motor , the bull gear is arranged on the motor bracket, the output shaft assembly is arranged on the axle center of the bull gear, the motor drives the pinion to rotate, the pinion drives the bull gear to rotate, and the bull gear rotates to drive the output shaft assembly to rotate . 4. A gear brake structure according to claim 3, characterized in that: when the motor starts, at the moment of starting, the output shaft assembly is in a static state, and when the big gear rotates at a certain angle, the top of the big gear The output shaft assembly rotates to make the brake pads separate from the brake pads, and the machine runs at high speed. 5. A gear brake structure according to claim 4, characterized in that: a reset assembly is provided between the output shaft assembly and the bull gear, and when the machine is powered off, the output shaft assembly acts as the reset assembly. The lower synchronously drives the brake pads to reset. 6 . The gear brake structure according to claim 5 , wherein the reset assembly includes a spring, one end of the spring is connected to the large gear, and the other end of the spring is connected to the output shaft assembly. 7. A gear brake structure according to claim 6, characterized in that: the output shaft assembly is provided with several arc-shaped installation parts at equal intervals in the circumferential direction, and the top of the arc-shaped installation part is provided with a rotating shaft, and the One end of the brake pad is rotated on the rotating shaft, the top of the brake pad is provided with a protective plate, the bottom of the arc-shaped installation part is provided with a stopper, and the rotating shaft and the stopper are set avoiding. 8. A gear brake structure according to claim 7, characterized in that: the large gear is provided with a chute, the chute is provided with a spring assembly position, and one end of the spring is fixed at the spring assembly position, The other end of the spring is connected to a block, and the block rotates with the output shaft assembly and slides along the chute to stretch or compress the spring. 9. A gear brake structure according to claim 8, characterized in that: the large gear is provided with a limit column, and an escape position is provided between two adjacent arc-shaped installation parts, and the large gear When assembling with the output shaft assembly, the limit column is set at the avoidance position, and cooperates with the arc-shaped installation part and the brake pad to limit the position. 10. A garden tool, characterized by comprising the gear brake structure according to any one of claims 1-9.

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