CN114788464A - Garden tool - Google Patents

Abstract

The invention discloses a garden electric tool, which comprises a machine body, wherein a power part on a prime motor is arranged in the machine body, a mechanical brake assembly for braking the power part is arranged in the machine body, and the mechanical brake assembly comprises a brake control piece and a position limiting piece; the brake control member comprises a handle and a first mechanical brake pad, and the handle and the first mechanical brake pad are linked; the first mechanical brake pad is in a first position of the brake control member when the first mechanical brake pad is far away from the power part, and the first mechanical brake pad is in a second position of the brake control member when the first mechanical brake pad is in pressing contact with the power part; the position limiter includes an elastic member configured to maintain the brake control member in a first position or a second position; the invention reduces the speed or stops the power part by the pressing contact of the braking control part and the power part, and maintains the braking state or the non-braking state by the elastic part, thereby having simple structure and high reliability.

Description

Garden tool

Technical Field

The invention belongs to the technical field of electric tools, and particularly relates to a garden tool.

Background

The chain saw is a very common gardening tool, and a motor is generally decelerated or stopped to rotate through a brake device in the using process. In the commonly used garden tools in the market, the electronic brake and the mechanical brake are usually matched with each other to complete the braking of the garden tool; the electronic brake is only suitable for the garden tool rotating at low speed, and the mechanical brake is suitable for the garden tool rotating at high speed; however, the mechanical brake part uses a V-shaped leaf spring element to provide elasticity, the leaf spring made of metal is abutted against the shell made of plastic, the part of the shell abutted against the leaf spring is abraded after long-term use, and the elasticity of the handle is too small, so that potential safety hazards are easily caused; the reliability of the mechanical brake in the comparison document is not good, and the practical environment of the electronic brake has certain limitation; therefore, there is a need to design a reliable gardening tool.

Disclosure of Invention

The garden tool is designed aiming at the problems in the prior art, the power part is decelerated or stopped by pressing and contacting the power part through the braking control part, and the braking state or the non-braking state is maintained through the elastic part, so that the garden tool is simple in structure and high in reliability.

The invention aims to be realized by the following technical scheme: a garden tool comprises a machine body, wherein a power part on a prime motor is arranged in the machine body, a mechanical brake assembly for braking the power part is arranged in the machine body, and the mechanical brake assembly comprises a brake control piece and a position limiting piece; the brake control member comprises a handle and a first mechanical brake pad, and the handle and the first mechanical brake pad are linked; the first mechanical brake pad is in a first position of the brake control member when the first mechanical brake pad is far away from the power part, and the first mechanical brake pad is in a second position of the brake control member when the first mechanical brake pad is in pressing contact with the power part; the position restricting member includes an elastic member configured to maintain the brake control member in the first position or the second position.

Preferably, a limiting part is arranged on one side, away from the power part, of the machine body relative to the braking control piece; when the braking control piece is located at the first position, the mechanical braking component abuts against the limiting part.

The brake control member abuts against the limiting part, so that the brake control member cannot rotate continuously and is maintained at the first position under the action of the position limiting member.

Preferably, the power unit of the prime mover is an outer rotor of an outer rotor motor.

Preferably, the brake system further comprises an electronic brake system and a control switch; the control switch is configured to be triggered by the brake control member; the electric brake system is configured to electronically brake the prime mover when the control switch is activated.

When the control switch is triggered by the brake control piece, the electronic brake system is started, and the outer rotor can be decelerated through the electronic brake system.

Preferably, the machine body is provided with a first connecting shaft, the braking control member is pivoted with the machine body through the first connecting shaft, and the handle and the first mechanical braking piece are respectively positioned on two sides of the first connecting shaft; the first end of the elastic piece is connected with the machine body through a first connecting structure, and the second end of the elastic piece is connected with the brake control piece through a second connecting structure; the distance between the first and second connecting structures varies as the brake control member moves between the first and second positions.

The first connecting shaft is arranged inside the machine body, the handle extends towards the outside of the machine body, and the first mechanical brake piece extends towards the inside of the machine body. The brake control member is pivoted with the machine body, so that the first mechanical brake piece can be close to or far away from the outer rotor when the handle is rotated; the first end of the elastic piece is connected with the machine body, the second end of the elastic piece is connected with the braking control piece, and the length of the elastic piece can be changed in the process that the braking control piece is switched between the first position and the second position.

Preferably, the second connecting structure approaches the power portion during the movement of the brake control member from the first position to the second position.

Preferably, the second connecting structure is configured to be located between the first connecting shaft and the first connecting structure; when the brake control member is in a third position, the first connecting shaft, the first connecting structure and the second connecting structure are collinear; and when the brake control member is located at the third position, the elastic member is not in a stretching state.

In the process that the brake control piece moves from the first position to the second position, the brake control piece passes through the third position, the first connecting shaft, the first connecting mechanism and the second connecting mechanism are collinear at the moment, and the elastic piece is always in a compressed state and is compressed to the shortest extent in the third position; the length of the elastic piece in the first position or the second position is larger than that in the third position; when the brake control member is in the third position, the length of the elastic member is not greater than the original length of the elastic member and the elastic member is in a compressed state.

Preferably, the first connecting shaft is configured to be located between the first connecting structure and the second connecting structure; when the brake control member is in a third position, the first connecting shaft, the first connecting structure and the second connecting structure are collinear; and when the brake control member is in the third position, the elastic member is not in a compressed state.

In the process that the braking control piece moves from the first position to the second position, the braking control piece passes through the third position, the first connecting mechanism and the second connecting mechanism are collinear at the moment, and the elastic piece is always in a stretching state and is stretched to the longest extent in the third position; the length of the elastic element in the first position or the second position is smaller than that in the third position; when the brake control member is in the third position, the length of the elastic member is not less than the original length of the elastic member and is always in a stretching state.

Preferably, the first end of the elastic element is pivoted with the machine body through the first connecting structure; the second end of the elastic piece is pivoted with the braking control piece through the second connecting structure.

Preferably, the elastic member is configured as an extension spring; the first connecting structure comprises a first shaft and a shaft sleeve; the first shaft is configured to be fixedly connected with the fuselage; the shaft sleeve is configured to rotatably fit over the first shaft; the first end of the elastic piece is relatively and fixedly connected with the shaft sleeve; the second connecting structure comprises a first pin shaft, the first connecting shaft is arranged between the first pin shaft and the first shaft, and the second end of the elastic part is pivoted with the first pin shaft.

When the elastic piece is in an uncompressed state, the first end of the elastic piece is provided with a hook part, so that the first end is always hooked on the shaft sleeve through the hook part, and the first end of the elastic piece can not leave the shaft sleeve all the time when the elastic piece rotates along with the braking control piece, so that the first end of the elastic piece and the shaft sleeve are in a relatively fixed connection state; the second end of the elastic piece is also arranged to be a hook part, and the second end of the elastic piece is hooked on the first pin shaft, so that the elastic piece can be always in a stretching state.

Preferably, the bushing is constructed of a metal material. The sleeve is preferably made of aluminum or steel.

Preferably, the elastic member is configured as a coil spring; the position restricting member further includes a spring seat configured to include a housing chamber having a length not less than a maximum length of the elastic member; one end of the spring seat is hinged with the braking control piece through a second pin shaft; and the second end of the elastic piece is relatively and fixedly connected with the spring seat.

The width of the accommodating cavity is slightly larger than the diameter of the elastic piece, so that excessive radial deformation of the elastic piece in the movement process is avoided. The containing cavity is used for containing an elastic piece, the second end of the elastic piece abuts against the inner wall of the containing cavity, and the first end of the elastic piece abuts against the surface of the shaft sleeve; the maximum length of the elastic member means the greater of the length of the elastic member when the brake control member is in the first position and the length of the elastic member when the brake control member is in the second position. Therefore, the elastic element is always in a compressed state when being placed in the spring seat.

Preferably, the first connecting structure includes a first shaft and a bushing; the first shaft is configured to be fixedly connected with the fuselage; the shaft sleeve is configured to rotatably fit over the first shaft; the first end of the elastic piece is relatively and fixedly connected with the shaft sleeve; and the shape of one end of the accommodating cavity deviating from the second pin shaft is matched with the shaft sleeve.

The elastic piece is arranged in the spring seat, the first end of the elastic piece abuts against the surface of the shaft sleeve, the second end of the elastic piece abuts against the position, deviating from the mounting shaft sleeve, of the accommodating cavity, and the spring seat is hinged with the braking control piece through a second pin shaft, so that the spring seat can extrude the braking control piece when the elastic piece is in a compressed state; the first end of the elastic piece is always tightly attached to the surface of the shaft sleeve; it sets up to the outer contour phase adaptation arc with the axle sleeve to accept the one end that the chamber deviates from the second round pin axle, and this curved internal diameter slightly is greater than the external diameter of axle sleeve, and this curved internal diameter is the same with the width of accepting the chamber.

Preferably, the mechanical brake assembly further comprises a second mechanical brake pad; the second mechanical brake pad is configured to be disposed on the brake control member or the position limiter.

The first mechanical brake piece is fixedly connected to the mounting seat, the second mechanical brake piece is fixedly connected to the spring seat, the first mechanical brake piece and the second mechanical brake piece are arranged in a vertically staggered mode, the outer rotor is decelerated simultaneously through the two mechanical brake pieces, and the deceleration effect is better.

The advantages of the invention compared to the prior art will be elucidated in the detailed description.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of a first brake pad of the present invention in a first position;

FIG. 3 is a schematic view of the first brake pad of the present invention in a second position;

FIG. 4 is an exploded view of the present invention;

FIG. 5 is an exploded view of the present invention employing an extension spring;

FIG. 6 is a view showing a state of use of the present invention using an extension spring;

FIG. 7 is a schematic view of the brake assembly in a first position when the present invention is used with dual brake pads;

FIG. 8 is a schematic view of the brake assembly in a second position when the present invention is used with dual brake pads;

FIG. 9 is a state diagram of the present invention in use;

fig. 10 is a perspective view of a spring seat.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

example 1

As shown in fig. 1 to 10, in this embodiment 1, a gardening tool is disclosed, which includes a machine body 1, a power unit 2 on a prime mover is disposed in the machine body 1, a mechanical braking assembly 3 for braking the power unit 2 is disposed in the machine body 1, and the mechanical braking assembly 3 includes a braking control member and a position limiting member; the brake control member comprises a handle 31 and a first mechanical brake block 32, and the handle 31 and the first mechanical brake block 32 are linked; the first mechanical brake pad 32 is in a first position of the brake control member when it is away from the power section 2, and the first mechanical brake pad 32 is in a second position of the brake control member when it is pressed against the power section 2; the position restricting member includes an elastic member 4 configured to maintain the brake control member in the first position or the second position.

A limiting part 5 is arranged on one side, opposite to the power part 2, of the machine body 1 relative to the braking control piece; when the brake control member is in the first position, the mechanical brake component 3 abuts against the limiting part 5. The brake control member abuts against the limiting portion 5, so that the brake control member cannot rotate continuously and is maintained at the first position under the action of the position limiting member. The power part 2 on the prime motor is an outer rotor on the outer rotor motor. In the present embodiment, the prime mover is configured as an electric motor, and the power unit 2 is an outer rotor on an outer rotor electric motor. In some embodiments, the prime mover is configured as an internal combustion engine and the power section 2 is configured to connect with the output shaft as a driven plate. The machine body 1 is also provided with an electronic braking system and a control switch 6; the control switch 6 is configured to be triggered by the brake control member; the electric brake system is configured to electrically brake the prime mover when the control switch 6 is activated. The control switch 6 is triggered by the brake control member and simultaneously activates the electronic brake system, through which the outer rotor is also decelerated.

The machine body 1 is provided with a first connecting shaft 8, the braking control member is pivoted with the machine body 1 through the first connecting shaft 8, and the handle 31 and the first mechanical brake piece 32 are respectively positioned at two sides of the first connecting shaft 8; the first end of the elastic part 4 is connected with the machine body 1 through a first connecting structure, and the second end of the elastic part 4 is connected with the braking control part through a second connecting structure; the distance between the first connection structure and the second connection structure varies as the brake control member moves between the first position and the second position. The first connecting shaft 8 is disposed inside the body 1, the handle 31 extends to the outside of the body 1, and the first mechanical brake piece 32 extends to the inside of the body 1. The brake control member is pivoted with the body 1, so that the first mechanical brake piece 32 is close to or far away from the outer rotor when the handle 31 is rotated; the first end of the elastic part 4 is connected with the machine body 1, the second end of the elastic part 4 is connected with the braking control part, and the length of the elastic part 4 can be changed in the process of switching the braking control part between the first position and the second position. During the movement of the brake control member from the first position towards the second position, the second connection structure approaches towards the power section 2. The second connecting structure is configured to be located between the first connecting shaft 8 and the first connecting structure; when the brake control member is in the third position, the first connecting shaft 8, the first connecting structure and the second connecting structure are collinear; and when the brake control member is in the third position, the elastic member 4 is not in a stretched state. In the process that the brake control member moves from the first position to the second position, the brake control member passes through the third position, the first connecting shaft 8, the first connecting mechanism and the second connecting mechanism are collinear at the moment, and the elastic member 4 is always in a compressed state and is compressed to the shortest length in the third position; the length of the elastic member 4 in the first position or the second position is greater than the length in the third position; when the brake control member is in the third position, the elastic member 4 is no longer than its original length and is in a compressed state.

The first end of the elastic element 4 is pivoted with the machine body 1 through the first connecting structure; and the second end of the elastic element 4 is pivoted with the brake control element through the second connecting structure. The elastic member 4 is configured as a coil spring; the position restricting member further includes a spring seat 35, and the spring seat 35 is configured to include a housing chamber having a length not less than a maximum length of the elastic member 4; one end of the spring seat 35 is hinged with the brake control member through a second pin shaft 36; the second end of the elastic element 4 is fixedly connected with the spring seat 35. The width of the accommodating cavity is slightly larger than the diameter of the elastic element 4, so as to avoid excessive radial deformation of the elastic element 4 during the movement process. The accommodating cavity is used for accommodating the elastic part 4, the second end of the elastic part 4 abuts against the inner wall of the accommodating cavity, and the first end of the elastic part 4 abuts against the surface of the shaft sleeve 37; the maximum length of the elastic member 4 means the greater of the length of the elastic member 4 when the brake control is in the first position and the length of the elastic member 4 when the brake control is in the second position. Therefore, the elastic member 4 is always in a compressed state when it is put into the spring seat 35. The first connecting structure includes a first shaft 34 and a bushing 37; the first shaft 34 is configured to be fixedly connected with the fuselage 1; the shaft sleeve 37 is configured to rotatably fit over the first shaft 34; the first end of the elastic element 4 is relatively fixedly connected with the shaft sleeve 37; the shape of the end of the receiving cavity facing away from the second pin 36 is adapted to the shaft sleeve 37. The elastic part 4 is arranged in the spring seat 35, the first end of the elastic part 4 is abutted against the surface of the shaft sleeve 37, the second end of the elastic part 4 is abutted against the position of the accommodating cavity departing from the mounting shaft sleeve 37, and the spring seat 35 is hinged with the braking control part through the second pin shaft 36, so that the spring seat 35 can extrude the braking control part when the elastic part 4 is in a compression state; the first end of the elastic element 4 is always tightly attached to the surface of the shaft sleeve 37; one end of the accommodating cavity departing from the second pin shaft 36 is set to be arc-shaped corresponding to the outer contour of the shaft sleeve 37, the inner diameter of the arc-shaped cavity is slightly larger than the outer diameter of the shaft sleeve 37, and the inner diameter of the arc-shaped cavity is the same as the width of the accommodating cavity.

The specific working process of this embodiment is as follows, the power part 2 of the garden tool is in a high-speed rotation state during the use process, at this time, the first mechanical brake pad 32 is in the first position, and the mechanical brake assembly 3 is in a non-braking state; the handle 31 is pulled, and the handle 31 and the mounting seat 33 synchronously rotate anticlockwise around the first connecting shaft 8; the handle 31 rotates, and meanwhile, the contact protrusion 7 touches the control switch 6, so that the control switch 6 cuts off a circuit; when the circuit is disconnected, the power part 2 can still continue to rotate under the action of inertia; during the rotation of the handle 31, the first mechanical brake piece 32 rotates from the third position to the second position, and the first mechanical brake piece 32 presses and contacts the power part 2 at the second position to realize the deceleration or stop of the power part 2.

The first caliper 32 is maintained at the first position or the second position according to the following working principle, the distance between the first connecting shaft 8 and the second pin 36 is always kept constant and is L1, the distance between the second pin 36 and the first shaft 34 is changed and is L2, and the distance between the first connecting shaft 8 and the first shaft 34 is kept constant and is L3; when the first mechanical brake pad 32 is at the third position, where the mounting seat 33 and the spring seat 35 are located on the same straight line, L3= L1+ L2, where the compression spring 41 in the spring seat 35 is compressed to the shortest position and the elastic force is the largest; when the handle 31 is pulled, when the mounting seat 33 is in pressing contact with the limiting part 5, the mounting seat 33 cannot rotate further, and then the first mechanical brake piece 32 is maintained at the first position; when the first mechanical brake block 32 on the mounting seat 33 is in pressing contact with the power part 2, the first mechanical brake block 32 cannot rotate continuously and is in the second position, and then the mechanical brake assembly 3 is in a braking state; when the first mechanical brake pad 32 is located at the first position or the second position, the mounting seat 33 and the spring seat 35 are not directly connected, at this time, L3< L1+ L2, the position of the second pin shaft 36 is far away from the first shaft 34, L2 is lengthened, the mounting seat 33 is hinged to the spring seat 35, the mounting seat 33 is far away from the first shaft 34 in the rotating process, and simultaneously, the spring seat 35 is driven to move together, and the compression spring 41 in the spring seat 35 extends and the elastic deformation amount is reduced while the spring seat 35 moves; because the amount of elastic deformation of the compression spring 41 when the first mechanical stop 32 is at the third position is the largest, if the first mechanical stop 32 is to move from the first position or the second position to the third position, it is necessary to overcome the elastic force of the compression spring 41 to make the handle 31 drive the mounting seat 33 to rotate; therefore, without the external force, the compression spring 41 in the spring seat 35 will press the spring seat 35, and the spring seat 35 will press the mounting seat 33, so that the first mechanical brake pad 32 on the mounting seat 33 is always maintained at the first position or the second position.

The power part 2 is connected with the saw chain 10 and drives the saw chain to rotate, the mechanical brake component 3 is pressed down, and the saw chain 10 stops rotating when the first mechanical brake pad 32 is at the second position; by pulling the mechanical brake assembly 3, the saw chain 10 can rotate normally when the first brake pad 32 is in the first position.

Example 2

As shown in fig. 1 to 6, this embodiment discloses a method of maintaining the first mechanical brake pad 32 at the first position or the second position by using the extension spring 42, and the other structure is the same as that of embodiment 1 except that the structure and the installation manner of the elastic member 4 are different; the elastic member 4 is configured as an extension spring 42; the first connecting structure includes a first shaft 34 and a bushing 37; the first shaft 34 is configured to be fixedly connected with the fuselage 1; the shaft sleeve 37 is configured to rotatably fit over the first shaft 34; the first end of the elastic element 4 is relatively fixedly connected with the shaft sleeve 37; the second connecting structure comprises a first pin shaft 9, the first connecting shaft 8 is arranged between the first pin shaft 9 and the first shaft 34, and the second end of the elastic part 4 is pivoted with the first pin shaft 9. When the elastic element 4 is in a non-compressed state, the first end of the elastic element 4 is set to be a hook part, so that the first end is always hooked on the shaft sleeve 37 through the hook part, and the first end of the elastic element 4 can not leave the shaft sleeve 37 all the time when the elastic element 4 rotates along with the braking control element, so that the first end of the elastic element 4 and the shaft sleeve 37 are in a relatively fixed connection state; the second end of the elastic member 4 is also set as a hook part, and the second end of the elastic member 4 is hooked on the first pin shaft 9, so that the elastic member 4 can be always in a stretching state. The boss 37 is constructed to be made of a metal material. The sleeve 37 is preferably made of aluminum or steel.

The first mechanical brake 32 is maintained at the first position or the second position according to the operation principle that the distance between the first pin 9 and the first shaft 34 changes with the rotation of the handle 31 and is S1, when the first mechanical brake 32 is at the third position, the mounting seat 33 and the extension spring 42 are in a straight line, the first connecting shaft 8 is located between the first pin 9 and the first shaft 34, the distance between the first pin 9 and the first shaft 34 is the maximum, that is, S1 is the maximum, and the extension amount of the extension spring 42 is the maximum; when the mounting seat 33 rotates to be out of the same straight line with the extension spring 42, the mounting seat 33 will be close to the power part 2 or the limiting part 5 on the casing, and at the same time, the position of the first pin shaft 9 will be close to the first shaft 34, so that S1 will be smaller, and finally the extension amount of the extension spring 42 will be smaller; when the first mechanical brake pad 32 is switched from the first position or the second position to the third position, the extension spring 42 needs to be extended by an external force, and the elastic force of the extension spring 42 is overcome by the external force, so that the mounting seat 33 and the extension spring 42 can rotate relatively; thus, the first mechatronic brake pad 32 will therefore always maintain the corresponding first or second position without being subjected to external forces.

Example 3

As shown in fig. 7 and 8, in the present embodiment, a first mechanical brake pad 32 is provided on a mount 33, and a second mechanical brake pad is provided on a spring seat 35; the other structure is the same as in embodiment 1. The mounting seat 33 is fixedly connected with the first mechanical brake piece 32, the spring seat 35 is provided with a second mechanical brake piece, and the first mechanical brake piece 32 and the second mechanical brake piece are arranged in a vertically staggered manner along the axial direction of the first connecting shaft 8.

The specific working process of the embodiment is as follows, the handle 31 is pulled, the mounting seat 33 is driven to rotate while the handle 31 rotates, the mounting seat 33 is hinged with the spring seat 35, and the spring seat 35 is driven to rotate while the mounting seat 33 rotates; the first mechanical brake pad 32 fixedly connected with the mounting seat 33 is close to the power portion 2 in the rotation process of the mounting seat 33, and the second mechanical brake pad fixedly connected with the mounting seat 35 is close to the power portion 2 in the rotation process of the spring seat 35, so that the first mechanical brake pad 32 and the second mechanical brake pad can simultaneously press and contact the power portion 2, the contact area between the power portion 2 and the brake control member is increased, and the brake effect of the brake control member is better.

According to the invention, a first mechanical brake block is driven to be close to or far away from a power part by a brake control part, and the first mechanical brake block is a first position of the brake control part when being far away from the power part; when the first mechanical brake block is in pressing contact with the power part, the brake control member is located at a second position, and the motor rotor is decelerated or stopped; the brake control part comprises a handle and a first mechanical brake piece, the process of controlling the first mechanical brake piece to rotate by the handle is simple, the reliability is high, and the speed of the power part can be stably reduced; the mechanical brake assembly further comprises a position limiting piece, the position limiting piece comprises an elastic piece, and the position limiting piece is stable in structure and can generate good acting force after long-time work; when the brake control part is not under the action of external force, the elastic part enables the first mechanical brake pad to be always maintained at the corresponding first position or second position, and the brake control part is reliable and stable. Therefore, the invention decelerates or stops the power part on the garden tool, and has simple structure and good reliability.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (14)

1. A garden tool comprises a machine body and is characterized in that a power part on a prime motor is arranged in the machine body, a mechanical brake assembly for braking the power part is arranged in the machine body, and the mechanical brake assembly comprises a brake control piece and a position limiting piece; the brake control member comprises a handle and a first mechanical brake pad, and the handle and the first mechanical brake pad are linked; the first mechanical brake pad is in a first position of the brake control member when the first mechanical brake pad is far away from the power part, and the first mechanical brake pad is in a second position of the brake control member when the first mechanical brake pad is in pressing contact with the power part; the position restricting member includes an elastic member, and is configured to maintain the brake control member in the first position or the second position.

2. The garden tool of claim 1, wherein a limiting portion is provided on the body opposite to a side of the braking control member facing away from the power portion; when the braking control piece is located at the first position, the mechanical braking component abuts against the limiting part.

3. The garden tool of claim 1, wherein the power section on the prime mover is an outer rotor on an outer rotor motor.

4. The garden tool of claim 1, further comprising an electronic braking system and a control switch; the control switch is configured to be triggered by the brake control member; the electric brake system is configured to electronically brake the prime mover when the control switch is activated.

5. The garden tool of claim 1, wherein the body is provided with a first connecting shaft, the brake control member is pivotally connected to the body through the first connecting shaft, and the handle and the first mechanical brake piece are respectively located at both sides of the first connecting shaft; the first end of the elastic piece is connected with the machine body through a first connecting structure, and the second end of the elastic piece is connected with the brake control piece through a second connecting structure; the distance between the first and second connecting structures varies as the brake control member moves between the first and second positions.

6. The garden tool of claim 5, wherein the second connection structure approaches the power section during movement of the brake control member from the first position toward the second position.

7. The garden tool of claim 5, wherein the second connection structure is configured to be located between the first connection shaft and the first connection structure; when the brake control member is in a third position, the first connecting shaft, the first connecting structure and the second connecting structure are collinear; and when the brake control member is located at the third position, the elastic member is not in a stretching state.

8. The garden tool of claim 5, wherein the first connection shaft is configured to be positioned between the first connection structure and the second connection structure; when the brake control member is in a third position, the first connecting shaft, the first connecting structure and the second connecting structure are collinear; and when the brake control member is located at the third position, the elastic member is not in a compressed state.

9. The gardening tool according to any one of claims 7 to 8, wherein the first end of the elastic member is pivotally connected to the main body through the first connecting structure; the second end of the elastic piece is pivoted with the braking control piece through the second connecting structure.

10. The garden tool of claim 9, wherein the first connection structure comprises a first shaft and a bushing; the first shaft is configured to be fixedly connected with the fuselage; the shaft sleeve is configured to be rotatably sleeved on the first shaft; the first end of the elastic piece is relatively fixedly connected with the shaft sleeve.

11. The garden tool of claim 10, wherein the bushing is configured to be made of a metal material.

12. The garden tool of claim 9, wherein the resilient member is configured as a coil spring; the position limiter further comprises a spring seat, wherein the spring seat is configured to comprise an accommodating cavity, and the length of the accommodating cavity is not less than the maximum length of the elastic piece; one end of the spring seat is hinged with the braking control piece through a second pin shaft; and the second end of the elastic piece is relatively and fixedly connected with the spring seat.

13. The garden tool of claim 12, wherein the first connection structure comprises a first shaft and a bushing; the first shaft is configured to be fixedly connected with the fuselage; the shaft sleeve is configured to rotatably fit over the first shaft; the first end of the elastic piece is relatively and fixedly connected with the shaft sleeve; and the shape of one end of the accommodating cavity deviating from the second pin shaft is matched with the shaft sleeve.

14. The garden tool of claim 1, wherein the mechanical brake assembly further comprises a second mechanical brake pad; the second mechanical brake pad is configured to be disposed on the brake control member or the position limiter.

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