US-12616089-B2 - Cutting deck lifting device and mower having cutting deck lifting device

US12616089B2US 12616089 B2US12616089 B2US 12616089B2US-12616089-B2

Abstract

A cutting deck lifting device for adjusting the height of the cutting deck of a mower includes a cutting deck having at least one cutting blade mounted thereto, a pedal assembly including a pedal switched between locking and unlocking states for adjusting the height of the cutting deck, a connecting assembly connecting the pedal assembly to the cutting deck and an adjusting assembly connected to the pedal assembly for positioning the cutting deck to a position with a desired height when the pedal is switched between locking and unlocking states. The cutting deck lifting device can conveniently and quickly adjust the cutting deck between the first position and the second position. Simultaneously, the cutting deck lifting device has a simple structure, a low manufacturing cost, and easy installation, and can be applied to a variety of garden tools.

Inventors

Qunli Wei
Xiaolei Qiu
Qin Ji
Dongdong SHI

Assignees

Greenworks (Jiangsu) Co., Ltd

Dates

Publication Date: 20260505
Application Date: 20231121
Priority Date: 20190917

Claims (15)

1 . A lifting device comprising: a work assembly; a drive assembly, switchable between a locked state and an unlocked state; a connection assembly, connected to said drive assembly and said work assembly, for transmitting an action of said drive assembly to said work assembly; an adjusting assembly configured between said drive assembly and said connection assembly for linking said adjusting assembly, said drive assembly and said connection assembly to adjust said work assembly to a desired height in a vertical direction when said drive assembly is switched between said locked state and said unlocked state; wherein simultaneous operation of said drive assembly by hand and foot is not required when the height of said work assembly in the vertical direction is switched from a first position to a second position; wherein said drive assembly comprises a pedal, said pedal comprising a pedal body, a bracket for attaching said pedal body to said connection assembly, and a rotating shaft for rotatably connecting said pedal body to said bracket; wherein said bracket has a limiting arm for limiting rotation of said pedal body, said pedal body being rotatably mounted to one end of said limiting arm through said rotating shaft and abutted against said limiting arm when depressed forward by an operator; wherein said limiting arm is provided at said one end thereof with an inclined guiding surface for allowing said pedal body to rotate about said rotating shaft, and an angle is formed between an extending direction of said limiting arm and said inclined guiding surface, said angle being a maximum rotatable angle of said pedal body.
2 . The lifting device according to claim 1 , wherein said pedal is switchable between the locked state and the unlocked state, said pedal being coupled to said connection assembly and said adjusting assembly, and said pedal, said connection assembly and said adjusting assembly are linked when said pedal is triggered.
3 . The lifting device according to claim 2 , wherein when said pedal is in said locked state, said work assembly is in said first position; when said pedal is in said unlocked state, said work assembly is in said second position.
4 . The lifting device according to claim 2 , wherein said adjusting assembly comprises a positioning member and a sliding plate coupled to said pedal, the relative positional relationship between said sliding plate and said positioning member changes when said pedal is switched between said locked state and said unlocked state.
5 . The lifting device according to claim 4 , wherein when said pedal is switched from said unlocked state to said locked state, said sliding plate slides away from said positioning member; when said pedal is switched from said locked state to said unlocked state, said sliding plate slides toward and against said positioning member.
6 . The lifting device according to claim 4 , wherein said sliding plate slides away from said positioning member when said work assembly is switched from said second position to said first position; said sliding plate slides toward and against said positioning member when said work assembly is switched from said first position to said second position.
7 . The lifting device according to claim 4 , wherein said adjusting assembly further comprises an adjusting plate opposite to said sliding plate, said sliding plate sliding forward along said adjusting plate to separate from said positioning member, and said sliding plate sliding backward along said adjusting plate to be against said positioning member.
8 . The lifting device according to claim 7 , wherein said positioning member is removably connected to said adjusting plate.
9 . The lifting device according to claim 7 , wherein said adjusting plate is provided with an adjusting slot matching with said positioning member to house said positioning member.
10 . The lifting device according to claim 7 , wherein said adjusting plate and said positioning member are configured with a limiting member to define a relative position between said positioning member and said adjusting plate.
11 . The lifting device according to claim 2 , wherein said drive assembly further comprises a locking mechanism operable to act on said pedal, said pedal being locked by said locking mechanism when in said locked state, and said pedal being unlocked from said locking mechanism when in said unlocked state.
12 . The lifting device according to claim 11 , wherein said pedal has a retaining portion, and said locking mechanism has a locking protrusion corresponding to said retaining portion, said retaining portion engaging said locking protrusion when said pedal is in said locked state, said locking mechanism locking said pedal, said retaining portion disengaging said locking protrusion when said pedal is in said unlocked state, said locking mechanism being unlocked from said pedal; wherein an edge of said pedal body is provided with a groove, when said pedal is in said locked state, said locking protrusion passes through said groove and engages with said retaining portion.
13 . The lifting device according to claim 2 , wherein said connection assembly comprises a lateral rotating shaft and a connecting mechanism attached to both ends of the lateral rotating shaft, wherein said connecting mechanism is connected to said work assembly, and wherein said drive assembly is connected to one end of said lateral rotating shaft to drive said work assembly connected to said connecting mechanism to move in the vertical direction while rotating said lateral rotating shaft.
14 . The lifting device according to claim 13 , further comprises an assisting component, said assisting component being attached to said lateral rotating shaft to assist said drive assembly in driving said lateral rotating shaft to rotate.
15 . A garden tool, comprising: a base; a cutting deck, attached to said base; a lifting device, comprises: a drive assembly, switchable between a locked state and an unlocked state; a connection assembly, connected to said drive assembly and said cutting deck, for transmitting an action of said drive assembly to said cutting deck; an adjusting assembly configured between said drive assembly and said connection assembly for linking said adjusting assembly, said drive assembly and said connection assembly to adjust said cutting deck to a desired height in a vertical direction when said drive assembly is switched between said locked state and said unlocked state; wherein simultaneous operation of said drive assembly by hand and foot is not required when the height of said cutting deck in the vertical direction is switched from a first position to a second position; wherein said drive assembly comprises a pedal, said pedal comprising a pedal body, a bracket for attaching said pedal body to said connection assembly, and a rotating shaft for rotatably connecting said pedal body to said bracket; wherein said bracket has a limiting arm for limiting rotation of said pedal body, said pedal body being rotatably mounted to one end of said limiting arm through said rotating shaft and abutted against said limiting arm when depressed forward by an operator; wherein said limiting arm is provided at said one end thereof with an inclined guiding surface for allowing said pedal body to rotate about said rotating shaft, and an angle is formed between an extending direction of said limiting arm and said inclined guiding surface, said angle being a maximum rotatable angle of said pedal body.

Description

CROSS-REFERENCE TO RELATED INVENTIONS The present application is a Continuation Application of U.S. application Ser. No. 17/023,934 filed on Sep. 17, 2020, which claims the priority of CN application Serial No. 201910874473.7, filed on Sep. 17, 2019, the disclosures of which are hereby incorporated by reference in their entirety. TECHNICAL FIELD The invention relates to a lifting device for lifting a cutting deck, in particular to a lifting device being suitable for a mower. BACKGROUND ART The height of cutting deck is usually adjusted via a lifting device, the operator needs to depress a height adjusting pedal by foot until the height of the deck is adjusted by a hand. The inconvenient operation process easily causes the operator fatigue and affects the safety use of the cutting deck because the operator must simultaneously use hand and foot to adjust the height of the cutting deck. In view of the above, there is a need to improve a lifting device of the existing mower to solve the above problems. SUMMARY OF INVENTION Present invention provides a cutting deck lifting device, the cutting deck lifting device can conveniently and quickly adjust a cutting deck between a first position and a second position; simultaneously, the cutting deck lifting device has a simple structure, a low manufacturing cost, and easy installation and can be applied to a variety of garden tools. To achieve the above object, the present invention provides a cutting deck lifting device for adjusting the height of the cutting deck of a mower comprising a cutting deck having at least one cutting blade mounted thereto, a pedal assembly including a pedal switched between locking and unlocking states for adjusting the height of the cutting deck, a connecting assembly connecting the pedal assembly to the cutting deck and an adjusting assembly connected to the pedal assembly for positioning the cutting deck to a position with a desired height when the pedal is switched between locking and unlocking states. As a further improvement of the invention, the cutting deck is in a first position when the pedal is in locking state, and wherein the cutting deck is in a second position when the pedal is in unlocking state, and wherein the height of the cutting deck is adjusted when the cutting deck is in the second position. As a further improvement of the invention, the cutting deck has different heights when in different second positions, and wherein the height of the cutting deck is adjusted when the cutting deck is lifted between the first position and the second position, and wherein the cutting deck is lifted between the first position and the second position when the pedal is switched between the locking state and the unlocking state. As a further improvement of the invention, the adjusting assembly includes a sliding plate rotatably connected to the pedal and a positioning member abutting against the sliding plate to position the cutting deck to the position with the desired height, and wherein the desired height is determined when the pedal is in locking state. As a further improvement of the invention, the sliding plate slides away from the positioning member when the pedal is switched from the unlocking state to the locking state, and wherein the sliding plate slides towards the positioning member and abuts against the positioning member when the pedal is switched from the locking state to the unlocking state. As a further improvement of the invention, the sliding plate slides away from the positioning member when the cutting deck is lifted from the second position to the first position, and wherein the sliding plate slides towards the positioning member and abuts against the positioning member when the cutting deck is lifted from the first position to the second position. As a further improvement of the invention, the adjusting assembly includes an adjusting plate corresponding to the sliding plate, and wherein the sliding plate slides forwardly along the adjusting plate to separate from the positioning member, and wherein the sliding plated slides backwardly along the adjusting plate to abut against the positioning member. As a further improvement of the invention, the positioning member is detachably connected to the adjusting plate, and wherein the adjusting plate has a plurality of adjusting holes for allowing the positioning membered inserting thereinto. As a further improvement of the invention, each adjusting hole is provided with a limiting slot, and wherein the positioning member has a limiting protrusion corresponding to the limiting slot, and wherein the limiting protrusion engages with the limiting slot for preventing the rotating between the positioning member and the adjusting hole. As a further improvement of the invention, the pedal assembly includes a locking mechanism corresponding to the pedal, and wherein the pedal is locked with the locking mechanism when in the locking state, and wherein the pedal is unlocked with the