CN218218383U - Push rod mechanism and garden tool with same - Google Patents

Abstract

The utility model provides a push rod mechanism, including last push rod and the lower push rod that can stretch out and draw back relatively, the lower push rod can connect in at least one side of instrument main part around the rotation axis pivotally, push rod mechanism is still including locating the folding control subassembly between lower push rod and the rotation axis, wherein, the folding control subassembly is including wearing to locate the spacer pin of lower push rod, locate the mounting of spacer pin one end, and locate the safety switch of the other end of spacer pin, mounting and instrument main part fixed connection, the spacer pin is operable to move between primary importance and second place, with the alternative be connected with mounting or safety switch. The spacer pin is arranged between the fixing piece and the safety switch, and is alternatively connected with the fixing piece or the safety switch, when the spacer pin is connected with the fixing piece, the safety switch is not triggered, the machine is normally started, and when the spacer pin is separated from the fixing piece, the safety switch is triggered, and the machine cannot be started. Make garden instrument can not start the operation under fold condition, guaranteed the operational safety of lawn mower.

Description

Push rod mechanism and garden tool with same

[ technical field ]

The utility model relates to a push rod mechanism still relates to the garden instrument that has this push rod mechanism.

[ background Art ]

Garden tools such as lawn mowers, snow shovels, and carts are provided with a control lever for pushing, such control lever generally includes a lower push lever connected to both sides of a garden tool body and an upper push lever connected to the lower push lever, and the upper push lever is provided with a holding portion for pushing when the garden tool is operated.

Taking a mower as an example, when the mower is in a working state, an operating rod connected to a main body of the mower extends to the rear of the mower by a certain length, so that an operator can work within a safety distance away from a cutting tool by a certain length; when the mower is in a non-working state, the mower needs to be stored. People have carried out folding type or telescopic design to the action bars for the storage needs, simultaneously in order to reach the requirement of security, increased safety switch mechanism in folding or flexible process to reduce the possibility that unexpected takes place. However, the existing technical scheme is not too complex in structure, but low in reliability and has potential safety hazards.

Accordingly, there is a need for an improved push rod mechanism that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To the not enough of prior art, the utility model aims to provide a simple structure and safe and reliable's push rod mechanism.

The utility model provides a technical scheme that prior art problem adopted is: a push rod mechanism comprises an upper push rod and a lower push rod which can relatively stretch out and draw back, wherein the lower push rod can be connected to at least one side of a tool main body in a pivoting mode around a rotating shaft; when the limiting pin is at the first position, the limiting pin is connected with the fixing piece to limit the rotation of the lower push rod relative to the rotating shaft; when the limit pin is at the second position, the limit pin is abutted and triggers the safety switch.

As a further optimized scheme, the limit pin penetrates through the lower push rod, and the fixing piece is provided with a fixing hole for receiving the limit pin.

As a further optimized scheme, the folding control assembly comprises a limiting shell for accommodating the limiting pin and a resetting piece arranged between the limiting pin and the limiting shell, and the resetting piece is abutted against the limiting pin in the direction close to the fixing piece.

As a further optimization scheme, the push rod mechanism further comprises a driving member for driving the limit pin to move in a direction away from the fixing member, the driving member is arranged at the bottom of the upper push rod, when the upper push rod is in an extended position relative to the lower push rod, the driving member is away from the limit pin, and when the upper push rod is contracted relative to the lower push rod, the driving member pushes the limit pin to move towards one side close to the safety switch.

As a further optimized scheme, the folding control assembly comprises a limiting shell for accommodating the limiting pin and a resetting piece arranged between the limiting pin and the limiting shell, and the resetting piece is abutted against the limiting pin in the direction close to the fixing piece.

As a further optimized scheme, the driving part is formed by downward extending the upper push rod to form a wedge-shaped surface, the limiting shell is provided with a waist-shaped hole facing the wedge-shaped surface, when the driving part moves downwards, the wedge-shaped surface penetrates through the waist-shaped hole and drives the limiting pin to overcome the resistance of the reset piece and move towards the direction close to the safety switch, and when the upper push rod is retracted in place, the limiting pin is separated from the fixing piece and triggers the safety switch.

As a further optimized scheme, the folding control assembly further comprises a moving pin penetrating through the kidney-shaped hole and vertically inserted into the limiting pin, and the moving pin is abutted against the wedge-shaped surface of the driving piece.

As a further optimization scheme, the safety switch is a contact switch or a Hall induction switch

As a further optimized solution, the safety switch includes a housing, a button protruding from the housing, and an actuating rod extending outward from the housing, the actuating rod is located on the top of the button, when the limit pin is in the first position, the actuating rod is in floating contact with the button, and when the limit pin is in the second position, the limit pin presses the actuating rod to trigger the button.

As a further optimized solution, the folding control assembly includes a housing, and the safety switch is accommodated in the housing.

Another object of the utility model is to provide a garden tool, this garden tool has foretell push rod mechanism.

Compared with the prior art, the utility model discloses following beneficial effect has: push rod mechanism and have this push rod mechanism's garden instrument has set up the folding control subassembly that has mounting, spacer pin and safety switch, and the spacer pin is located between mounting and the safety switch to alternatively be connected with mounting or safety switch, then the safety switch does not trigger when being connected with the mounting, and the machine normally starts, and then the safety switch triggers when breaking away from with the mounting, and the machine can not start. So set up, simple structure, ingenious for garden instrument can not start the operation under fold condition, has guaranteed the operational safety of lawn mower.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:

fig. 1 is a schematic view of the overall structure of the lawn mower according to the preferred embodiment of the present invention;

FIG. 2 is an enlarged schematic view of a portion of the mower shown in FIG. 1;

FIG. 3 is a schematic view of a portion of a push rod mechanism of the mower of FIG. 2;

FIG. 4 is an enlarged schematic view of a portion of the push rod mechanism shown in FIG. 3;

fig. 5 is an enlarged schematic view of a partial structure of the push rod mechanism shown in fig. 4 in another state.

The meaning of the reference symbols in the figures:

100. mower 1, pusher mechanism 11, and lower pusher

12. Upper push rod 123, driving piece 2 and main body

21. Fixing piece 211, fixing hole 23, and rotation shaft

3. Traveling roller 4, starting switch 6 and safety switch

61. Actuating lever 62, push button 63, housing

7. Folding control assembly 71, limit pin 72 and shell

73. Limiting shell 74, moving pin 731 and kidney-shaped hole

1231. Wedge-shaped surface

[ detailed description of the invention ]

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationships, are used solely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1, a lawn mower 100 according to a preferred embodiment of the present invention is shown, the lawn mower 100 includes a main body 2, a motor and a transmission mechanism driven by the motor are disposed in the main body 2, a blade driven by the transmission mechanism to rotate is disposed below the main body 2, a grass collecting bag is disposed behind the main body 2, in this embodiment, the lawn mower 100 is a dc electric lawn mower 100, and the lawn mower 100 further includes a battery compartment for receiving a battery pack. When the mower 100 is started, the battery pack supplies power to the motor, the motor outputs rotating kinetic energy to the blade through the transmission mechanism, so that the lawn is trimmed, and trimmed grass clippings enter the grass collecting bag along with the air duct arranged inside the main body 2. The main body 2 of the mower 100 is supported by four traveling rollers 3, a push rod mechanism 1 is provided behind the mower 100, the push rod mechanism 1 is provided with a start switch 4, the traveling rollers 3 are electrically connected to the start switch 4, in other words, after the mower 100 is started, the traveling rollers 3 can travel as needed, and when the mower travels to a position where mowing is needed, the mowing is stopped, and after the mowing task of the area is completed, the mower continues to travel to the next area where mowing is needed.

Continuing to combine with fig. 1 and fig. 2, the present application mainly proposes an improvement to the push rod mechanism 1, the push rod mechanism 1 of the present application includes an upper push rod 12 and a lower push rod 11 that can relatively extend and retract, the lower push rod 11 can be pivotally connected to both sides of the tool main body 2 around a rotation shaft 23, the push rod mechanism 1 further includes a folding control assembly 7 disposed between the lower push rod 11 and the rotation shaft 23, wherein the folding control assembly 7 includes a limit pin 71 penetrating the lower push rod 11, a fixing member disposed at one end of the limit pin 71, and a safety switch 6 disposed at the other end of the limit pin 71, the fixing member is fixedly connected to the tool main body 2, the limit pin 71 is operable to move between a first position and a second position to alternatively connect to the fixing member or the safety switch 6; when the limiting pin 71 is at the first position, one end of the limiting pin 71 is connected with the fixing piece to limit the rotation of the lower push rod 11 relative to the rotating shaft 23; when the stopper pin 71 is in the second position, the other end of the stopper pin 71 triggers the safety switch 6.

Due to the arrangement of the position relations of the fixing piece, the limiting pin 71 and the safety switch 6, when the limiting pin 71 is connected with one of the limiting pin 71 and the other one of the limiting pin 71 is disconnected with the limiting pin 71, the safety switch 6 is triggered when the push rod mechanism 1 is in the folding position, the starting of the mower 100 is limited, and the triggering of the safety switch 6 can be released only when the push rod mechanism 1 returns to the stretching position of normal working, so that the mower 100 can be started normally to work. Of course, it is also possible that the handspike mechanism 1 is connected to only one side of the tool body 2.

The safety switch 6 is typically a contact switch triggered by mechanical contact or a position switch triggered by induction, typically a hall-effect switch. In the present embodiment, a contact switch is described as an example, but a hall sensor switch may be used in an alternative embodiment.

As shown in fig. 2, the safety switch 6 includes a housing 63, a button 62 protruding from the housing 63, and an actuating rod 62 extending outward from the housing 63, wherein the actuating rod 62 is located on top of the button 62, the actuating rod 62 is in floating contact with the button 62 when the stopper pin 71 is in the first position, and the stopper pin 71 presses the actuating rod 62 to press the button 62 to trigger the safety switch 6 when the stopper pin 71 is in the second position.

In the present embodiment, the folding control unit 7 includes a housing 72, and the safety switch 6 is housed in the housing 72.

Referring to fig. 3 to 5, the limit pin 71 penetrates through the lower push rod 11 along a direction parallel to the rotating shaft 23, the fixing member 21 is a plate-shaped member, the fixing member 21 is fixedly connected to the rotating shaft 23, and the fixing member 21 is provided with a fixing hole 211 for receiving the limit pin 71. When the limit pin 71 enters the fixing hole 211 of the fixing member 21, the fixing member 21 is fixed in position relation with the lower push rod 11, and the lower push rod 11 cannot rotate relative to the fixing member 21, thereby ensuring the stability of the position and angle of the push rod in the operation process of the mower 100.

In the present embodiment, only one fixing hole 211 is provided on the fixing member 21, but in other embodiments, in order to meet the requirement of users with different heights for adjusting the height of the push rod, a plurality of fixing holes 211 are provided on the fixing member 21, and a plurality of fixing holes 211 are arranged along an arc line. Of course, the number of the fixing holes 211 may be more or less, and is not limited herein.

As shown in fig. 3 to 5, the folding control assembly 7 includes a limiting shell 73 accommodating the limiting pin 71, and a reset member (not shown) disposed between the limiting pin 71 and the limiting shell 73, wherein the reset member presses the limiting pin 71 toward the fixing member 21. The reset piece is arranged to make the limiting pin 71 have a movement tendency to enter the fixing hole 211, so that when a user pulls the push rod mechanism 1 to restore it to the use position, as long as the push rod mechanism is rotated to a proper angle, the limiting pin 71 will automatically enter the corresponding fixing hole 211 under the driving of the elastic force of the reset piece, and the positioning of the lower push rod 11 is completed. In this embodiment, the return member is a spring.

With continued reference to fig. 4 and fig. 5, the push rod mechanism 1 further includes a driving element 123 for driving the limiting pin 71 to move away from the fixing element, the driving element 123 is disposed at the bottom of the upper push rod 12, when the upper push rod 12 is in the extended position relative to the lower push rod 11, the driving element 123 is away from the limiting pin 71, and when the upper push rod 12 is retracted relative to the lower push rod 11, the driving element 123 pushes the limiting pin 71 to move toward the side close to the safety switch 6. The movement of the limit pin 71 needs the upper push rod 12 to trigger, that is, only when the upper push rod 12 is retracted to the right position, the limit pin 71 can be triggered to disengage from the fixing member, so that the folding of the push rod mechanism 1 is realized, at this time, the safety switch 6 is triggered, and the mower 100 cannot perform mowing work.

Specifically, the driving member 123 extends downwards from the upper push rod 12 to form a wedge-shaped surface 1231, the limiting shell 73 is provided with a waist-shaped hole 731 facing the driving member 123, when the driving member 123 moves downwards, the wedge-shaped surface 1231 passes through the waist-shaped hole 731 and drives the limiting pin 71 to move towards the direction close to the safety switch 6 by overcoming the resistance of the reset member, and when the upper push rod 12 is retracted to the proper position, the limiting pin 71 is separated from the fixing member and triggers the safety switch 6. The driving member 123 provides a wedge surface 1231 contacting with the stopper pin 71, and as the push-down rod 11 moves downward, the stopper pin 71 is pushed by the wedge surface 1231 to move away from the fixing member and close to the safety switch 6, thereby disengaging the fixing hole 211 and triggering the safety switch 6.

With continued reference to fig. 4 and 5, the folding control assembly 7 further includes a moving pin 74 extending through the kidney-shaped hole 731 and vertically inserted into the stopper pin 71, wherein the moving pin 74 interferes with the wedge surface 1231 of the driving member 123. The wedge-shaped surface 1231 is always contacted with the moving pin 74, and in the process of moving the driving element 123 downwards, the wedge-shaped surface 1231 pushes the moving pin 74 to drive the limiting pin 71 to gradually move towards the direction close to the safety switch 6, so as to overcome the resistance of the reset element and gradually contact with the actuating rod 62 of the safety switch 6, when the upper push rod 12 is retracted to the proper position, the moving pin 74 completely disengages from the fixing hole 211 of the fixing element and moves to the side of the kidney-shaped hole 731 close to the safety switch 6, the limiting pin 71 completely presses the actuating rod 62 to trigger the button 62, at this time, the upper push rod 12 is retracted to the proper position, the push rod mechanism 1 can be folded, and the mower 100 cannot start mowing operation. Wherein the end of the moving pin 74 is inserted and fixed into the stopper pin 71.

To sum up, the utility model provides a handspike 1 has set up the folding control subassembly 7 that has mounting 21, spacer pin 71 and safety switch 6 to spacer pin 71 is located between mounting 21 and the safety switch 6, can select one to be connected with mounting 21 or safety switch 6, so sets up, and simple structure, ingenious makes garden instrument can not start the operation under fold condition, has guaranteed lawn mower 100's operational safety.

The present invention is not limited to the above-described embodiments. It can be easily understood by those skilled in the art that the push rod mechanism 1 and the garden tool having the push rod mechanism 1 of the present invention have many alternatives without departing from the spirit and scope of the present invention. The protection scope of the present invention is subject to the content of the claims.

Claims (10)

1. A push rod mechanism comprises an upper push rod and a lower push rod which can relatively stretch out and draw back, the lower push rod can be pivotally connected to at least one side of a tool main body around a rotating shaft, the push rod mechanism further comprises a folding control assembly arranged between the lower push rod and the rotating shaft, and the push rod mechanism is characterized in that: the folding control assembly comprises a limiting pin penetrating through the lower push rod, a fixing piece arranged at one end of the limiting pin and a safety switch arranged at the other end of the limiting pin, the fixing piece is fixedly connected with the tool main body, and the limiting pin can move between a first position and a second position in an operable manner so as to be connected with the fixing piece or the safety switch alternatively; when the limiting pin is at the first position, the limiting pin is connected with the fixing piece to limit the rotation of the lower push rod relative to the rotating shaft; when the limit pin is at the second position, the limit pin is abutted and triggers the safety switch.

2. The pusher mechanism of claim 1, wherein: the limiting pin penetrates through the lower push rod, and a fixing hole for receiving the limiting pin is formed in the fixing piece.

3. The pusher mechanism of claim 2, wherein: folding control assembly is including holding the spacing shell of spacer pin, still including locating the spacer pin with reset the piece between the spacing shell, reset the piece to being close to the direction of mounting supports and presses the spacer pin.

4. The pusher mechanism of claim 1, wherein: the push rod mechanism further comprises a driving piece for driving the limiting pin to move towards the direction far away from the fixing piece, the driving piece is arranged at the bottom of the upper push rod, when the upper push rod is opposite to the lower push rod and is located at the extending position, the limiting pin is far away from the driving piece, and when the upper push rod is opposite to the lower push rod and contracts, the driving piece pushes the limiting pin to move towards one side close to the safety switch.

5. The pusher mechanism of claim 4, wherein: folding control assembly is including holding the spacing shell of spacer pin, still including locating the spacer pin with reset the piece between the spacing shell, reset the piece to being close to the direction of mounting supports and presses the spacer pin.

6. The pusher mechanism of claim 5, wherein: the driving piece by last push rod downwardly extending forms the wedge, spacing shell seted up towards the waist type hole of wedge, when the driving piece moves down, the wedge passes waist type hole and drives the spacer pin overcomes reset piece's resistance moves to the direction that is close to safety switch, works as when last push rod shrink targets in place, the spacer pin breaks away from the mounting and triggers safety switch.

7. The pusher mechanism of claim 6, wherein: the folding control assembly further comprises a moving pin penetrating through the waist-shaped hole and vertically inserted into the limiting pin, and the moving pin is abutted to the wedge-shaped surface of the driving piece.

8. The pusher mechanism of claim 1, wherein: the safety switch is a contact switch or a Hall induction switch.

9. The pusher mechanism of claim 8, wherein: the folding control assembly comprises a shell, and the safety switch is contained in the shell.

10. A garden tool, characterized in that: the garden tool has a pusher mechanism according to any one of claims 1 to 9.

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