WO2023025131A1 - 推杆机构及具有该机构的割草机 - Google Patents

推杆机构及具有该机构的割草机 Download PDF

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Publication number
WO2023025131A1
WO2023025131A1 PCT/CN2022/114158 CN2022114158W WO2023025131A1 WO 2023025131 A1 WO2023025131 A1 WO 2023025131A1 CN 2022114158 W CN2022114158 W CN 2022114158W WO 2023025131 A1 WO2023025131 A1 WO 2023025131A1
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WO
WIPO (PCT)
Prior art keywords
push rod
limiting
operating handle
pivot shaft
operating
Prior art date
Application number
PCT/CN2022/114158
Other languages
English (en)
French (fr)
Inventor
侯维平
Original Assignee
江苏东成工具科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏东成工具科技有限公司 filed Critical 江苏东成工具科技有限公司
Priority to DE112022001992.1T priority Critical patent/DE112022001992T5/de
Publication of WO2023025131A1 publication Critical patent/WO2023025131A1/zh
Priority to US18/398,246 priority patent/US20240122098A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/001—Accessories not otherwise provided for
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/824—Handle arrangements
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D67/00—Undercarriages or frames specially adapted for harvesters or mowers; Mechanisms for adjusting the frame; Platforms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/82—Other details
    • A01D34/828—Safety devices
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D75/00—Accessories for harvesters or mowers
    • A01D75/18—Safety devices for parts of the machines
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D2101/00—Lawn-mowers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping

Definitions

  • the invention relates to a push rod mechanism, and also relates to a lawnmower with the push rod mechanism.
  • the lawn mower is provided with an operating lever for pushing.
  • This type of operating lever usually includes a lower push rod connected to both sides of the main body of the lawn mower and an upper push rod connected with the lower push rod. A grip part to push while working.
  • the operating rod When the lawn mower is in working condition, the operating rod extends a certain length to the rear of the lawn mower for the operator to work within a certain distance away from the cutting tool; machine for storage.
  • people In order to meet the needs of storage, people have carried out a folding or telescopic design on the operating rod.
  • a safety switch mechanism has been added during the folding or telescopic process to reduce the possibility of accidents.
  • the current existing technical solutions are either too complicated in structure, or have low reliability and potential safety hazards.
  • the object of the present invention is to provide a push rod mechanism with simple structure, safety and reliability.
  • a push rod mechanism including a relatively telescopic lower push rod and an upper push rod and sleeved at the joint between the lower push rod and the upper push rod
  • the telescopic control assembly the lower push rod is provided with a through hole penetrating through the side wall, the telescopic control assembly includes a stopper at least partially accommodated in the through hole, the stopper abuts against the upper
  • the side wall of the push rod has a limit state that limits the expansion and contraction of the upper push rod relative to the lower push rod;
  • the telescopic control assembly also includes a manipulation member that can press against the limit member, and controls the An operating handle for moving the operating member, the operating handle has a first position and a second position and can move between the first position and the second position, when the operating handle is in the first position, the The operating member presses the limiting member so that the limiting member remains in a limited state; when the operating handle is in the second position, the
  • the operating handle is rotated between the first position and the second position around a pivot shaft, the operating handle is connected to the pivot shaft in transmission, and the operating member is connected to the pivot shaft. shaft.
  • both the upper push rod and the lower push rod are hollow tubular members
  • the through hole includes a positioning hole penetrating through the tube wall of the lower push rod
  • the upper push rod is provided with a through tube wall and a position-limiting hole that coincides with the positioning hole
  • the position-limiting member includes a first position-limiting member
  • the first position-limiting member has a feature that keeps entering the position-limiting hole to limit the upper push rod relative to the The tendency of the push rod to stretch.
  • the telescoping control assembly includes a housing for accommodating the first limiting member and the operating member, and the first limiting member includes a limiting plate pivotally connected to the housing and a limiting ball connected to the limiting plate, the limiting ball is at least partially accommodated in the positioning hole, and the diameter of the limiting ball is equivalent to the size of the positioning hole.
  • the telescoping control assembly further includes an elastic member arranged between the limiting plate and the housing, and the limiting plate has the function of pushing the The movement trend of the limiting ball entering the limiting hole.
  • the manipulating member includes a first manipulating member, the first manipulating member is a stopper provided on the pivot shaft, and the stopper and the limiting plate are aligned along the The axial direction of the pivoting shaft is adjacently arranged, and when the operating handle is in the first position, the stopper overlaps at least partly with the limit plate along the circumferential direction of the pivoting shaft; when the operating handle When in the second position, the stopper is dislocated from the limiting plate along the circumferential direction of the pivot shaft.
  • the through hole of the lower push rod also includes a bar-shaped hole opened on one side facing the pivot shaft, and the limiting member also includes a second limiting member.
  • the position piece is a flexible piece accommodated in the strip-shaped hole, and the flexible piece passes through the strip-shaped hole and abuts against the side wall of the upper push rod.
  • the manipulating member also includes a second manipulating member that rotates synchronously with the first manipulating member, the second manipulating member is a second cam arranged around the pivot shaft, and the second cam Aligned with the flexible member along the axial direction of the pivot shaft, the second cam has a short diameter and a long diameter around the outer circumference of the pivot shaft, and when the operating handle is in the first position, the long diameter The short diameter presses against the flexible member; when the operating handle is in the second position, the short diameter faces the flexible member.
  • the telescoping control assembly further includes a receiving portion located between the flexible member and the second cam, and the receiving portion is used for receiving and supporting the flexible member.
  • Another object of the present invention is to provide a lawnmower, which includes a main body, a grass bag located behind the main body, and push rod mechanisms arranged on both sides of the main body; wherein, the push rod mechanism is any one of the above-mentioned The push rod mechanism described in the item above, the push rod mechanism is located above the grass bag.
  • the present invention has the following beneficial effects: it is set so that only when the operating handle is moved to the second position, the limiter can be released from the limit state, thereby allowing the upper push rod to expand and contract relative to the lower push rod, In this way, during the operation of the lawn mower (the operating handle is at the first position at this time), the telescopic operation between the upper push rod and the lower push rod is prohibited, thus ensuring the operation safety of the lawn mower.
  • the push rod mechanism has a simple structure, is easy to manufacture and assemble, and has high stability.
  • Fig. 1 is the overall structure schematic diagram of the mower of preferred embodiment of the present invention.
  • Fig. 2 is a schematic structural view of the push rod mechanism of the mower shown in Fig. 1;
  • Fig. 3 is the enlarged schematic view of the local structure of the push rod mechanism shown in Fig. 2;
  • Fig. 4 is an enlarged schematic view of the partial structure shown in Fig. 3 in another state;
  • Fig. 5 is a partial structural schematic diagram of the push rod mechanism shown in Fig. 1;
  • Fig. 6 is an enlarged schematic view of the telescopic control assembly of the push rod mechanism shown in Fig. 5;
  • Fig. 7 is an enlarged schematic view of the telescoping control assembly shown in Fig. 6 in another state.
  • Stopper Main body 3. Traveling rollers
  • Fig. 1 is a lawn mower 100 in a preferred embodiment of the present invention.
  • the mechanism drives the rotating blade, and the rear of the main body 2 is provided with a grass collecting bag.
  • the lawn mower 100 is a DC electric lawn mower 100, and the lawn mower 100 is also provided with a battery compartment for receiving a battery pack.
  • the battery pack supplies power to the motor, and the motor outputs kinetic energy to the blade through the transmission mechanism, thereby trimming the lawn.
  • the main body 2 of the lawn mower 100 is supported by four walking rollers 3, and the rear of the lawn mower 100 is provided with a push rod mechanism 1, and the push rod mechanism 1 is provided with a start switch 4, and the travel roller 3 can be established with the start switch 4. Electrically connected, in other words, after the lawn mower 100 is started, the walking roller 3 can move on its own as needed, and stop mowing when it reaches the position where it needs to be mowed. Mowed areas.
  • the lawn mower 100 also includes a push rod mechanism 1, which is arranged on both sides of the main body 2 and above the grass bag, and the push rod mechanism 1 can be retracted and folded for storage when not in use. , thereby saving storage space.
  • the push rod mechanism 1 is provided with a safety switch 5, that is, when the push rod mechanism 1 is in the folded and retracted state, the lawn mower 100 cannot walk Cutting operations also cannot be performed.
  • the push rod mechanism 1 and the safety switch 5 will be described in detail below.
  • a push rod mechanism 1 includes a relatively telescopic lower push rod 11, an upper push rod 12, and The telescopic control assembly 8, the lower push rod 11 is provided with a through hole through the side wall, the telescopic control assembly includes a limiter at least partially accommodated in the through hole, the limiter is against the side wall of the upper push rod 12 and has a limit The limit state where the upper push rod 12 is telescopic relative to the lower push rod 11, the telescopic control assembly also includes a manipulation member capable of pressing against the limit member, and an operating handle for controlling the movement of the manipulation member.
  • the operating handle has a range between the first position and the second position. , and move between the first position and the second position. When the operating handle is at the first position, the manipulating member presses against the limiter so that the limiter remains in the limit state; when the operating handle is at the second position, the manipulating member Give way to the stop to allow the stop to exit the stop.
  • the push rod mechanism has a simple structure, is easy to manufacture and assemble, and has high stability.
  • the limiter and the operating handle of the push rod mechanism 1 have a mutually restrictive effect. Only when the upper push rod 12 is stretched from the lower push rod 11 to a suitable working position, the limiter enters the upper push rod 12 and the lower push rod 11 When the operating handle is kept in the limit state, the operating handle can be fixed at the first position (that is, the locked state), thereby allowing the mower to start; on the other hand, only when the operating handle is moved to the second position (that is, the unlocked state) ), the limiter can exit the limit state to allow the telescopic movement of the upper push rod 12 relative to the lower push rod 11.
  • the telescopic control assembly 8 thus arranged has a simple and ingenious structure, which can effectively avoid misoperation of the mower 100 and prevent safety accidents.
  • the operating handle 14 rotates between the first position and the second position around a pivot shaft 15, the operating handle 14 is connected to the pivot shaft 15 in transmission, and the operating member is connected to on the pivot shaft 15.
  • the transmission connection between the operating handle 14 and the pivot shaft 15 is through a non-circular contact surface, such as the cooperation between a hexagonal surface and an inner hexagonal surface.
  • the operating handle 14 drives the pivot shaft 15 to rotate through the rotating operation, so that the operating member rotates accordingly, so that when the operating handle 14 rotates between the first position and the second position, the operating member is also pressing against or giving way to the limit member. Rotate between positions.
  • the manner in which the operating handle 14 drives the manipulation member to move may also be linear reciprocating motion, vertical conversion motion or other motion modes, which will not be repeated here.
  • the push rod mechanism 1 includes a start switch 4 and a safety switch 5 connected to the start switch 4 signal, the safety switch 5 is located in the telescopic control assembly 8, when the operating handle 14 is in the second position, The safety switch 5 is triggered, and the starting switch 4 is restricted to start; when the operating handle 14 is in the first position, the safety switch 5 is not triggered, and the starting switch 4 is allowed to start.
  • the safety switch 5 is linked with the operating handle 14. In other words, the safety switch 5 is related to the telescopic state of the upper push rod 12. When the upper push rod 12 is in a retracted state or allowed to shrink, the safety switch 5 is triggered to remind the user that at this time Mowing operations cannot be performed.
  • the safety switch 5 has a switch housing 53, a button 52 protruding from the switch housing 53 and an activation rod 51 connected to one side of the button 52, and the telescopic control assembly 8 includes a
  • the cam 16 of 15, the radius of rotation of the cam 16 changes evenly along the circumference of the pivot shaft 15, and the operating handle 14 rotates to drive the cam 16 to rotate.
  • the cam 16 The maximum radius of rotation of the cam 16 is pressed against the trigger lever 51 to trigger the button 52 to activate the safety switch 5; Button 52 can be activated.
  • the operation handle 14 is linked with the cam 16 that triggers the safety switch 5, so that the operation handle 14 triggers the safety switch 5 with one key while changing the position, and the start switch is simply and directly turned off without reaction time, and the safety can be implemented in time for the user. protection.
  • Both the upper push rod 12 and the lower push rod 11 are hollow tubular parts, which can be round tubes or flat tubes.
  • the upper push rod 12 and the lower push rod 11 shown in this embodiment are both flat tubes.
  • the push rod mechanism 1 in this embodiment has two lower push rods 11, which are respectively pivotally arranged on both sides of the main body 2, and correspondingly, two upper push rods 12 are also provided, which are respectively arranged through telescopic Both ends of the control assembly 8 can be relatively telescopically sleeved on the connection between the lower push rod 11 and the upper push rod 12 .
  • This embodiment provides two sets of telescopic control components, that is, the first limiter and the first manipulating member that cooperates with the first limiter, and the second limiter and the second manipulator that cooperates with the second limiter , in this embodiment, the first manipulating member and the second manipulating member are linked with the operating handle 14, that is, when the operating handle 14 is rotated, the first manipulating member and the second manipulating member are controlled so that both of them press the first limit position at the same time. part and the second limiting part, or give way to the first limiting part and the second limiting part at the same time.
  • the simultaneous application of two sets of telescopic control components is conducive to strengthening the stability of the limit state and providing double guarantees for telescopic control.
  • Figures 5-7 contain both sets of telescopic control components, which will be described one by one below.
  • the through hole includes a positioning hole 111 that runs through the tube wall of the lower push rod 11, and the upper push rod 12 is provided with a limiting hole 121 that penetrates the tube wall and coincides with the positioning hole 111.
  • the limiting member includes a first A limiting member, the first limiting member has a tendency to keep entering the limiting hole 121 to limit the expansion and contraction of the upper push rod 12 .
  • the first limiting member enters the limiting hole 121 coincident with the positioning hole 111, the relative positions of the upper push rod 12 and the lower pushing rod 11 are locked by the first limiting member, and it is difficult for the two to move relative to each other.
  • the telescopic control assembly 8 includes a housing 13 for accommodating the first limiting member and the operating member.
  • the first limiting member includes a limiting plate 17 pivotally arranged on the housing 13 and a locking plate connected to the limiting plate 17.
  • the limiting ball 17 is at least partially accommodated in the positioning hole 111 , and the diameter of the limiting ball 17 is equivalent to the size of the positioning hole 111 .
  • both the positioning hole 111 and the limit hole 121 are round holes, and the limit ball 18 is a steel ball with high strength and wear resistance.
  • the limit ball 18 is also Can be made of other metals or plastic materials.
  • the limiting plate 17 is provided with a receiving groove for accommodating the limiting ball 18, providing a receiving space for the limiting ball 18, and the limiting plate 17 is pivotally connected to the housing 13, so that the limiting ball 18 can Enter or exit the positioning hole 111 with the limiting plate 17.
  • the telescoping control assembly 8 also includes an elastic member 81 arranged between the limiting plate 17 and the housing 13. Under the action of the elastic force of the elastic member 81, the limiting plate 17 has a movement of pushing the limiting ball 18 into the limiting hole 121. trend.
  • the limiting plate 17 is elastically supported and has a movement tendency toward the limiting hole 121, so that when the upper push rod 12 stretches to a certain position relative to the lower pushing rod 11, the limiting plate 17 drives the limiting ball under the drive of the elastic force 18 enters the pipe wall of the upper push rod 12 through the positioning hole 111 and the limit hole 121.
  • the operating handle 14 can be moved from the second position to the first position, and only when the operating handle 14 moves to the first position, Lawn mower 100 can be started.
  • the limit ball 18 cannot withdraw from the limit hole 121, so the telescopic operation of the upper push rod 12 relative to the lower push rod 11 is restricted; while in the second position, the operating member gives way to The limit plate 17 and the upper push rod 12 can push the limit ball 18 out of the positioning hole 111 by using the pipe wall to cross the surface of the limit ball 18, so as to perform telescopic operation.
  • the arrangement of the elastic member 81 makes the limiting plate 17 move towards the positioning hole 111 , so that the limiting ball 18 is kept in the positioning hole 111 and the limiting hole 121 .
  • the elastic member 81 is a spring, and the spring is stretched in a natural state, and the stretched spring keeps the limiting plate 17 close to the positioning hole 111 .
  • the elastic member 81 can also be a torsion spring, and the two lead-out ends of the torsion spring respectively press against the ends of the housing 13 and the limit plate 17, so that the limit plate 17 is kept in the natural state.
  • the positioning holes 111 tend to approach.
  • the manipulating member includes a first manipulating member, the first manipulating member is a stopper 19 arranged on the pivot shaft 15, and the stopper 19 and the limit plate 17 are arranged along the pivot shaft 15. Axially close to the arrangement, when the operating handle 14 is in the first position (as shown in Figure 7), the stopper 19 overlaps at least partially with the limit plate 17 along the circumference of the pivot shaft 15; when the operating handle 14 is in the second position position (as shown in FIG. 6 ), the stopper 19 is misaligned with the limit plate 17 along the circumferential direction of the pivot shaft 15 . In other words, the stopper 19 is axially located on one side of the limiting plate 17 opposite to the positioning hole 111.
  • the stopper 19 presses against the limiting plate 17 to prevent the limiting plate 17 with the limiting ball 18 from withdrawing from the position. hole 111, so that the upper push rod 12 cannot be stretched relative to the lower push rod 11 at this time; in the second position, the stopper 19 is rotated by a certain angle from the position overlapping with the limit plate 17 to give way to the limit plate 17 , so that it has a pivotable activity space, thereby allowing the limit ball 18 to withdraw from the positioning hole 111 to realize the relative telescopic movement of the upper push rod 12 and the lower push rod 11 .
  • the first manipulating member i.e. the stopper 19
  • the first limiter i.e. the limiter plate 17 with the limit ball 18
  • the telescoping control assembly further includes a second limiting member and a second manipulating member matched therewith.
  • the through hole of the lower push rod 11 also includes a bar-shaped hole 113 opened on one side facing the pivot shaft 15, and the second limiting member is a flexible member 83 accommodated in the bar-shaped hole 113, and the flexible member 83 runs through the bottom of the lower push rod 11.
  • the bar-shaped hole 113 also abuts against the side wall of the upper push rod 12 .
  • the flexible member 83 enters between the upper push rod 12 and the lower push rod 11 through the bar-shaped hole 113 to limit the relative telescopic operation of the upper push rod 12 and the lower push rod 11 .
  • the second manipulating member matched with it is a second cam 82 arranged around the pivot shaft 15, and the second cam 82 is aligned with the flexible member 83 along the axial direction of the pivot shaft 15.
  • Two cams 82 have a short diameter and a long diameter around the periphery of the pivot shaft 15.
  • the second cam 82 respectively presses and makes way for the flexible member 83, so that the flexible member 83 is kept in a limited position. state and exit limit state, thereby limiting or unlocking the telescopic operation of the upper push rod 12 relative to the lower push rod 11.
  • the operating handle 14 can be moved to and fixed at the first position.
  • the second cam 82 that moves with the operating handle 14 rotates to the long diameter and is pressed against by the flexible member 83.
  • the operating handle 14 is rotated to move to the second position, and the second cam 82 rotates with the operating handle 14 to the position where the short diameter faces the flexible member 83.
  • the protruding length of the second cam 82 is not enough Go deep into the position where the upper push rod 12 is in conflict, so the upper push rod 12 cannot be limited, and the upper push rod 12 can be stretched relative to the lower push rod 11 .
  • the telescoping control assembly further includes a receiving portion 84 located between the flexible member 83 and the second cam 82 , the receiving portion 84 is used for receiving and supporting the flexible member 83 .
  • Fig. 5-Fig. 7 in conjunction with Fig. 3 and Fig. 4, it can be seen that the cam 16, the stopper 19 and the second cam 82 are all arranged on the pivot shaft 15 and are driven synchronously with the operating handle 14.
  • the operating handle can be rotated to and fixed at the first position.
  • the stopper 19 presses against the limit plate 17, and at the same time, the second cam 82 presses against the flexible member 83, so that the push-up
  • the telescopic movement of the rod 12 relative to the lower push rod 11 is strictly limited.
  • the cam does not trigger the safety switch, and the lawn mower 100 can be started normally;
  • the stopper 19 gives way to the limit plate 17, and at the same time the second cam 82 no longer presses the flexible member 83, thereby allowing the limit ball 18 and the flexible member 83 to exit the position-limiting state. Shrink the upper push rod 11 into the lower push rod 11; it is worth reminding that when the operating handle is turned to the second position, the cam triggers the safety switch, and the lawn mower in this state cannot start the mowing operation.
  • the lawnmower 100 and its push rod mechanism 1 provided by the present invention due to the mutual restriction of the manipulator and the limiter, make the machine able to move only when the upper push rod 12 and the lower push rod 11 are stretched in place. is triggered to start, and during the operation of the machine, the telescopic operation between the upper push rod 12 and the lower push rod 11 is prohibited, and because two sets of synchronously moving telescopic control components are set, the stability of the push rod mechanism 1 is better, The operating safety of lawnmower 100 is improved.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

一种推杆机构（1），包括可相对伸缩的下推杆（11）与上推杆（12）以及套接于下推杆（11）与上推杆（12）的连接处的伸缩控制组件（8），下推杆（11）设有贯穿侧壁的通孔，伸缩控制组件（8）包括至少部分容纳于通孔内的限位件，限位件抵靠于上推杆（12）的侧壁且具有限制上推杆（12）相对下推杆（11）伸缩的限位状态；其中，伸缩控制组件（8）还包括能够抵压限位件的操纵件，以及控制操纵件移动的操作把手（14），操作把手（14）具有第一位置和第二位置并能够在第一位置和第二位置间移动，当操作把手（14）处于第一位置时，操纵件抵压限位件以使限位件保持在限位状态；当操作把手（14）处于第二位置时，操纵件让位于限位件以允许限位件退出限位状态。

Description

推杆机构及具有该机构的割草机 [技术领域]
本发明涉及一种推杆机构，还涉及具有该推杆机构的割草机。
[背景技术]
割草机设置有用于推行的操作杆，此类操作杆通常包括连接于割草机主体两侧的下推杆以及与下推杆相连的上推杆，下推杆上设置有供割草机作业时推行的握持部。
当割草机处于工作状态时，操作杆向割草机后方延伸一定的长度，供操作者在远离切割工具一定长度的安全距离内工作；当割草机处于非工作状态时，需要将割草机进行收藏储放。人们为了存储需要，对操作杆进行了折叠式或伸缩式设计，同时为了达到安全性的要求，在折叠或伸缩过程中增加了安全开关机构，以降低意外发生的可能性。但目前现有的技术方案不是结构过于复杂，就是可靠性不高、存在安全性隐患。
鉴于此，确有必要提供一种改进的推杆机构，以克服现有技术存在的缺陷。
[发明内容]
针对现有技术的不足，本发明的目的在于提供一种结构简单且安全可靠的推杆机构。
本发明解决现有技术问题所采用的技术方案是：一种推杆机构，包括可相对伸缩的下推杆与上推杆以及套接于所述下推杆与所述上推杆的连接处的伸缩控制组件，所述下推杆设有贯穿侧壁的通孔，所述伸缩控制组件包括至少部分容纳于所述通孔内的限位件，所述限位件抵靠于所述上推杆的侧壁且具有限制所述上推杆相对所述下推杆伸缩的限位状态；其中，所述伸缩控制组件还包括 能够抵压所述限位件的操纵件，以及控制所述操纵件移动的操作把手，所述操作把手具有第一位置和第二位置并能够在所述第一位置和所述第二位置间移动，当所述操作把手处于所述第一位置时，所述操纵件抵压所述限位件以使所述限位件保持在限位状态；当所述操作把手处于所述第二位置时，所述操纵件让位于所述限位件以允许所述限位件退出所述限位状态。
作为进一步的优化方案，所述操作把手围绕一枢转轴在所述第一位置和所述第二位置间转动，所述操作把手与所述枢转轴传动连接，所述操纵件连接于所述枢转轴。
作为进一步的优化方案，所述上推杆和所述下推杆均为空心管状件，所述通孔包括贯穿所述下推杆的管壁的定位孔，所述上推杆设有贯穿管壁且与所述定位孔重合的限位孔，所述限位件包括第一限位件，所述第一限位件具有保持进入所述限位孔以限制所述上推杆相对所述下推杆伸缩的趋势。
作为进一步的优化方案，所述伸缩控制组件包括收容所述第一限位件和所述操纵件的壳体，所述第一限位件包括枢转地连接于所述壳体的限位板和连接于所述限位板的限位球，所述限位球至少部分容纳于所述定位孔内，且所述限位球的直径与所述定位孔的尺寸相当。
作为进一步的优化方案，所述伸缩控制组件还包括设于所述限位板和所述壳体之间的弹性件，所述限位板在所述弹性件的弹性力作用下，具有推动所述限位球进入所述限位孔的运动趋势。
作为进一步的优化方案，所述操纵件包括第一操纵件，所述第一操纵件为设于所述枢转轴上的止挡件，所述止挡件与所述限位板在沿所述枢转轴的轴向上紧邻设置，当所述操作把手处于所述第一位置时，所述止挡件沿所述枢转轴的周向与所述限位板至少部分重叠；当所述操作把手处于所述第二位置时，所 述止挡件沿所述枢转轴的周向与所述限位板错位设置。
作为进一步的优化方案，所述下推杆的所述通孔还包括面向所述枢转轴的一侧开设的条形孔，所述限位件还包括第二限位件，所述第二限位件为容纳于所述条形孔内的柔性件，所述柔性件贯穿所述条形孔并抵靠所述上推杆的侧壁。
作为进一步的优化方案，所述操纵件还包括与所述第一操纵件同步转动的第二操纵件，所述第二操纵件为围绕所述枢转轴设置的第二凸轮，所述第二凸轮沿所述枢转轴的轴向与所述柔性件对齐，所述第二凸轮围绕所述枢转轴的外周具有短径和长径，当所述操作把手处于所述第一位置时，所述长径抵压所述柔性件；当所述操作把手处于所述第二位置时，所述短径面向所述柔性件。
作为进一步的优化方案，所述伸缩控制组件还包括位于所述柔性件和所述第二凸轮之间的收容部，所述收容部用于容纳和支撑所述柔性件。
本发明的另一目的在于提供一种割草机，包括主体、位于所述主体后方的集草袋及设于所述主体两侧的推杆机构；其中，所述推杆机构为上述任一项所述的推杆机构，所述推杆机构位于所述集草袋的上方。
与现有技术相比，本发明具有如下有益效果：如此设置，使得只有在操作把手移动到第二位置时，才能使限位件退出限位状态，从而允许上推杆相对下推杆伸缩，这样，在割草机运行期间(此时操作把手处于第一位置)，上推杆和下推杆之间的伸缩操作被禁止，如此，保证了割草机的操作安全性。推杆机构结构简单，制造、装配容易，稳定性高。
[附图说明]
下面结合附图对本发明的具体实施方式做进一步详细的说明:
图1是本发明较佳实施例的割草机的整体结构示意图；
图2是图1所示的割草机的推杆机构的结构示意图；
图3是图2所示的推杆机构的局部结构的放大示意图；
图4是图3所示的局部结构在另一状态下的放大示意图；
图5是图1所示的推杆机构的部分结构示意图；
图6是图5所示的推杆机构的伸缩控制组件的放大示意图；
图7是图6所示的伸缩控制组件在另一状态下的放大示意图。
图中附图标记的含义：
100、割草机            1、推杆机构            11、下推杆
111、定位孔            12、上推杆             121、限位孔
13、壳体               14、操作把手           15、枢转轴
16、凸轮               17、限位板             18、限位球
19、止挡件             2、主体                3、行走滚轮
4、启动开关            5、安全开关            51、激发杆
52、按钮               53、开关壳体           8、伸缩控制组件
81、弹性件             82、第二凸轮           83、柔性件
84、收容部             113、条形孔
[具体实施方式]
在本发明中使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本发明。例如下述的“上”、“下”、“前”、“后”等指示方位或位置关系的词语仅基于附图所示的方位或位置关系，仅为了便于描述本发明和简化描述，而不是指示或暗示所指的装置/元件必须具有特定的方位或以特定的方位构造和操作，因此不能理解为对本发明的限制。
请参阅图1所示，为本发明优选实施例中的割草机100，该割草机100包括主体2，主体2内设有电机和被电机驱动的传动机构，主体2下方设有被传动机构带动旋转的刀片，主体2的后方设有集草袋，在本实施例中，割草机100为直流电动割草机100，割草机100还设有接收电池包的电池仓。当割草机100启动时，电池包向电机供电，电机通过传动机构向刀片输出动能，从而对草坪进 行修剪，被修剪的草屑随着主体2内部设置的风道进入集草袋。另外，割草机100的主体2被四个行走滚轮3支撑，割草机100的后方设有推杆机构1，推杆机构1上设有启动开关4，行走滚轮3可与启动开关4建立电性连接，换言之，割草机100启动后，行走滚轮3可以根据需要自走，走到需要割草的位置时停下割草，完成该区域的割草任务后，继续行走到下个需要割草的区域。
在本实施方式中，割草机100还包括推杆机构1，推杆机构1设于主体2的两侧，并位于集草袋的上方，推杆机构1可伸缩和折叠以便在闲置时收纳，从而节省存储空间。为了防止用户在推杆收缩或折叠时误启动割草机100而引起安全事故，推杆机构1设置有安全开关5，即在推杆机构1处于折叠和收缩状态时，割草机100无法行走也无法执行切割操作。以下将针对推杆机构1和安全开关5进行详细说明。
结合图1、图4、图5所示，一种推杆机构1，包括可相对伸缩的下推杆11、上推杆12以及套接于下推杆11与上推杆12的连接处的伸缩控制组件8，下推杆11设有贯穿侧壁的通孔，伸缩控制组件包括至少部分容纳于通孔内的限位件，限位件抵靠于上推杆12的侧壁且具有限制上推杆12相对下推杆11伸缩的限位状态，伸缩控制组件还包括能够抵压限位件的操纵件，以及控制操纵件移动的操作把手，操作把手具有第一位置和第二位置间，并在第一位置和第二位置间移动，当操作把手处于第一位置时，操纵件抵压限位件以使限位件保持在限位状态；当操作把手第二位置时，操纵件让位于限位件以允许限位件退出限位状态。
由于操纵件对限位件的限制，使得只有在操纵件移动到第二位置时，限位件才可退出限位状态，从而允许上推杆12相对下推杆11伸缩。而在割草机100运行期间(即操作把手处于第一位置时)，上推杆12和下推杆11之间的伸缩操 作被禁止，如此，保证了割草机100的操作安全性。推杆机构结构简单，制造、装配容易，稳定性高。
推杆机构1的限位件和操作把手具有相互限制的作用，仅当上推杆12从下推杆11中拉伸到适合工作的位置，限位件进入上推杆12和下推杆11之间而保持在限位状态时，操作把手才可固定于第一位置(即锁紧状态)，从而允许割草机启动；另一方面，仅当操作把手移动到第二位置(即解锁状态)，限位件才能退出限位状态，以允许上推杆12相对下推杆11的伸缩运动。如此设置的伸缩控制组件8结构简单、巧妙，能够有效避免割草机100的误操作，防止出现安全意外。
在本实施方式中，所述操作把手14围绕一枢转轴15在所述第一位置和所述第二位置间转动，所述操作把手14与所述枢转轴15传动连接，所述操纵件连接于所述枢转轴15。操作把手14与枢转轴15之间通过非圆形接触面进行传动连接，例如六边形面与内六角面的配合，本领域的技术人员可以想到多种替代方式，此处不再举例。总之，操作把手14通过旋转操作带动枢转轴15转动，从而使操纵件随之转动，使得操作把手14在第一位置和第二位置间转动时，操纵件也在抵压或让位限位件的位置间转动。
当然，在其他实施方式中，操作把手14带动操纵件移动的方式也可以是直线往复运动，垂直转换运动或其他运动方式，此处不再赘述。
参见图1-图3所示，推杆机构1包括启动开关4和与启动开关4信号连接的安全开关5，安全开关5设于伸缩控制组件8内，当操作把手14处于第二位置时，安全开关5被触发，启动开关4被限制启动；当操作把手14处于第一位置时，安全开关5未被触发，启动开关4被允许启动。安全开关5与操作把手14联动，换言之，安全开关5与上推杆12的伸缩状态有关，当上推杆12处于 收缩状态，或允许收缩的状态时，安全开关5被触发，提醒用户此时不能进行割草操作。
进一步参见图3、图4，安全开关5具有开关壳体53、突出于开关壳体53的按钮52和连接于按钮52一侧的激发杆51，伸缩控制组件8包括沿径向突出于枢转轴15的凸轮16，凸轮16的旋转半径沿枢转轴15的周向均匀变化，操作把手14旋转，带动凸轮16转动，当操作把手14转动到第一位置时(如图3所示)，凸轮16的最大旋转半径抵压激发杆51以触发按钮52从而激活安全开关5；而当操作把手14转动到第二位置时(如图4所示)，凸轮16的最小旋转半径接触激发杆51而未能触发按钮52。操作把手14与触发安全开关5的凸轮16联动，使得操作把手14在变换位置的同时一键触发安全开关5，简单、直接地关断启动开关，不需要反应时间，能够及时地对用户实行安全防护。
上推杆12和下推杆11均为空心管状件，可以是圆管，也可以是扁管，本实施例所展示的上推杆12和下推杆11均为扁管。其中，本实施例中的推杆机构1有两根下推杆11，分别可枢转地设置在主体2的两侧，与此对应地，上推杆12也设有两根，分别通过伸缩控制组件8的两端可相对伸缩地套接于下推杆11与上推杆12的连接处。
本实施方式提供了两套伸缩控制组件，即第一限位件和与第一限位件配合的第一操纵件，以及第二限位件和与第二限位件配合的第二操纵件，在本实施方式中，第一操纵件、第二操纵件与操作把手14联动，即操作把手14转动时控制第一操纵件和第二操纵件，使得两者分别同时抵压第一限位件和第二限位件，或同时分别让位第一限位件和第二限位件。两套伸缩控制组件同时应用，有利于加强限位状态的稳固性，为伸缩控制提供了双重保障。图5-图7同时包含了这两套伸缩控制组件，下文将逐一进行说明。
参见图5-图7，通孔包括贯穿下推杆11的管壁上的定位孔111，上推杆12设有贯穿管壁且与定位孔111重合的限位孔121，限位件包括第一限位件，第一限位件具有保持进入限位孔121以限制上推杆12伸缩的趋势。当第一限位件进入与定位孔111重合的限位孔121中时，上推杆12和下推杆11的相对位置被第一限位件锁定，两者难以发生相对伸缩的运动。
具体地，伸缩控制组件8包括收容第一限位件和操纵件的壳体13，第一限位件包括可枢转地设于壳体13的限位板17和连接于限位板17的限位球17，限位球17至少部分容纳于定位孔111内，且限位球17的直径与定位孔111的尺寸相当。在本实施方式中，定位孔111和限位孔121都是圆孔，限位球18为钢球，强度较高，且比较耐磨损，当然，在其他实施方式中，限位球18也可以由其他金属或者塑性材料制成。
具体地，限位板17设有收容限位球18的收纳槽，为限位球18提供了收容空间，且限位板17可枢转地连接于壳体13，使得限位球18能随着限位板17进入或退出定位孔111。
伸缩控制组件8还包括设于限位板17和壳体13之间的弹性件81，限位板17在弹性件81的弹性力作用下，具有推动限位球18进入限位孔121的运动趋势。限位板17被弹性地支撑且具有朝向限位孔121的运动趋势，如此，在上推杆12相对下推杆11伸缩到位的时候，限位板17在弹性力的驱使下带动限位球18通过定位孔111和限位孔121进入上推杆12的管壁内，此时，操作把手14才可以由第二位置移动到第一位置，而只有当操作把手14移动到第一位置，割草机100才可启动。在第一位置，由于操纵件的抵压，限位球18不能退出限位孔121，因而上推杆12相对下推杆11的伸缩操作被限制；而在第二位置，操纵件让位于限位板17，上推杆12可以利用管壁越过限位球18的表面而将限位球 18推出定位孔111以外，从而进行伸缩操作。
弹性件81的设置使得限位板17具有向定位孔111靠近的运动趋势，便于限位球18保持在定位孔111和限位孔121内。在本实施方式中，弹性件81为弹簧，且该弹簧在自然状态下呈伸展状态，伸展的弹簧使得限位板17保持向定位孔111靠近的趋势。当然，在其他实施方式中，弹性件81也可以是扭簧，扭簧的两个引出端分别抵压壳体13和限位板17的端部，使得限位板17在自然状态下保持向定位孔111靠近的趋势。
继续参见图6、图7所示，操纵件包括第一操纵件，第一操纵件为设于枢转轴15上的止挡件19，止挡件19与限位板17在沿枢转轴15的轴向上紧邻设置，当操作把手14在第一位置(如图7所示)时，止挡件19沿枢转轴15的周向与限位板17至少部分重叠；当操作把手14在第二位置(如图6所示)时，止挡件19沿枢转轴15的周向与限位板17错位设置。换言之，止挡件19沿轴向位于限位板17相对定位孔111的一侧，在第一位置，止挡件19抵压限位板17，阻止限位板17带限位球18退出定位孔111，因而上推杆12在此时不能相对下推杆11伸缩；在第二位置，止挡件19由与限位板17部分重合的位置转动一定的角度而让位于限位板17，使其具有可枢转的活动空间，从而允许限位球18退出定位孔111以实现上推杆12和下推杆11的相对伸缩运动。
以上，操作把手14转动时，带动第一操纵件(即止挡件19)在抵压第一限位件(即带有限位球18的限位板17)和让位于第一限位件的两个位置间转动，从而使上推杆12相对下推杆11的伸缩操作被限制或解除限制。
继续参见图5-图7所示，伸缩控制组件还包括第二限位件和与之配合的第二操纵件。下推杆11的通孔还包括面向枢转轴15的一侧开设的条形孔113，第二限位件为容纳于条形孔113内的柔性件83，柔性件83贯穿下推杆11的条形 孔113并抵靠上推杆12的侧壁。柔性件83通过条形孔113进入上推杆12和下推杆11之间以限制上推杆12和下推杆11的相对伸缩操作。
当第二限位件为柔性件83时，与之配合的第二操纵件为围绕枢转轴15设置的第二凸轮82，第二凸轮82沿枢转轴15的轴向与柔性件83对齐，第二凸轮82围绕枢转轴15的外周具有短径和长径，当操作把手14处于第一位置时(如图7所示)，长径抵压柔性件83；当操作把手14处于第二位置时(如图6所示)，短径面向柔性件83。第二凸轮82随着操作把手14转动，当操作把手14分别处于第一位置和第二位置时，第二凸轮82分别对柔性件83进行抵压和让位，使得柔性件83在保持限位状态和退出限位状态间变换，从而限制或解锁上推杆12相对下推杆11的伸缩操作。
上推杆12、下推杆11伸缩到位时，操作把手14可以移至并固定于第一位置，此时随着操作把手14移动的第二凸轮82转动到长径通过柔性件83抵压在上推杆12的外壁上，从而阻止上推杆12相对下推杆11的伸缩运动。需要收缩上推杆12时，旋转操作把手14使之移动到第二位置，第二凸轮82随着操作把手14转动到短径面向柔性件83的位置，此时第二凸轮82突起的长度不够深入到抵触上推杆12的位置，因而不能对上推杆12进行限位，上推杆12便可相对下推杆11进行伸缩。
伸缩控制组件还包括位于柔性件83和第二凸轮82之间的收容部84，收容部84用于容纳和支撑柔性件83。
结合图3、图4参阅图5-图7可知，凸轮16、止挡件19和第二凸轮82均设置于枢转轴15上并随操作把手14同步带动，当上推杆12相对下推杆11处于伸展位置即可操作的位置时，操作把手可以转动到并固定于第一位置，此时止挡件19抵压限位板17，同时第二凸轮82抵压柔性件83，使得上推杆12相 对下推杆11的伸缩运动被严格限制，此时凸轮不触发安全开关，割草机100可正常启动；而当用户需要收纳推杆机构时，将操作把手转动到第二位置，则止挡件19让位于限位板17，同时第二凸轮82不再抵压柔性件83，从而允许限位球18和柔性件83退出限位状态，此时用户只要稍加用力，即可收缩将上推杆11收缩进下推杆11中；值得提醒的是，在操作把手转动到第二位置的同时，凸轮触发了安全开关，此种状态下的割草机无法启动割草操作。
综上所述，本发明提供的割草机100及其推杆机构1，由于操纵件和限位件的相互限制，使得只有在上推杆12和下推杆11伸缩到位时，机器才能够被触发启动，而在机器运行期间，上推杆12和下推杆11之间的伸缩操作被禁止，且由于设置了两套同步运动的伸缩控制组件，推杆机构1的稳定性更佳，割草机100的操作安全性更好。
本发明不局限于上述具体实施方式。本领域普通技术人员可以很容易地理解到，在不脱离本发明原理和范畴的前提下，本发明的割草机和推杆机构还有很多的替代方案。本发明的保护范围以权利要求书的内容为准。

Claims (9)

  1. 一种推杆机构，包括可相对伸缩的下推杆与上推杆以及套接于所述下推杆与所述上推杆的连接处的伸缩控制组件，所述下推杆设有贯穿侧壁的通孔，所述伸缩控制组件包括至少部分容纳于所述通孔内的限位件，所述限位件抵靠于所述上推杆的侧壁且具有限制所述上推杆相对所述下推杆伸缩的限位状态；其特征在于：所述伸缩控制组件还包括能够抵压所述限位件的操纵件，以及控制所述操纵件移动的操作把手，所述操作把手具有第一位置和第二位置并能够在所述第一位置和所述第二位置间移动，当所述操作把手处于所述第一位置时，所述操纵件抵压所述限位件以使所述限位件保持在限位状态；当所述操作把手处于所述第二位置时，所述操纵件让位于所述限位件以允许所述限位件退出所述限位状态。
  2. 根据权利要求1所述的推杆机构，其特征在于：所述操作把手围绕一枢转轴在所述第一位置和所述第二位置间转动，所述操作把手与所述枢转轴传动连接，所述操纵件连接于所述枢转轴。
  3. 根据权利要求2所述的推杆机构，其特征在于：所述上推杆和所述下推杆均为空心管状件，所述通孔包括贯穿所述下推杆的管壁的定位孔，所述上推杆设有贯穿管壁且与所述定位孔重合的限位孔，所述限位件包括第一限位件，所述第一限位件具有保持进入所述限位孔以限制所述上推杆相对所述下推杆伸缩的趋势。
  4. 根据权利要求3所述的推杆机构，其特征在于：所述伸缩控制组件包括收容所述第一限位件和所述操纵件的壳体，所述第一限位件包括枢转地连接于所述壳体的限位板和连接于所述限位板的限位球，所述限位球至少部分容纳于所述定位孔内，且所述限位球的直径与所述定位孔的尺寸相当。
  5. 根据权利要求4所述的推杆机构，其特征在于：所述伸缩控制组件还包括设于所述限位板和所述壳体之间的弹性件，所述限位板在所述弹性件的弹性力作用下，具有推动所述限位球进入所述限位孔的运动趋势。
  6. 根据权利要求5所述的推杆机构，其特征在于：所述操纵件包括第一操纵件，所述第一操纵件为设于所述枢转轴上的止挡件，所述止挡件与所述限位板在沿所述枢转轴的轴向上紧邻设置，当所述操作把手处于所述第一位置时，所述止挡件沿所述枢转轴的周向与所述限位板至少部分重叠；当所述操作把手处于所述第二位置时，所述止挡件沿所述枢转轴的周向与所述限位板错位设置。
  7. 根据权利要求3所述的推杆机构，其特征在于：所述下推杆的所述通孔还包括面向所述枢转轴的一侧开设的条形孔，所述限位件还包括第二限位件，所述第二限位件为容纳于所述条形孔内的柔性件，所述柔性件贯穿所述条形孔并抵靠所述上推杆的侧壁。
  8. 根据权利要求7所述的推杆机构，其特征在于：所述操纵件还包括与所述第一操纵件同步转动的第二操纵件，所述第二操纵件为围绕所述枢转轴设置的第二凸轮，所述第二凸轮沿所述枢转轴的轴向与所述柔性件对齐，所述第二凸轮围绕所述枢转轴的外周具有短径和长径，当所述操作把手处于所述第一位置时，所述长径抵压所述柔性件；当所述操作把手处于所述第二位置时，所述短径面向所述柔性件。根据权利要求8所述的推杆机构，其特征在于：所述伸缩控制组件还包括位于所述柔性件和所述第二凸轮之间的收容部，所述收容部用于容纳和支撑所述柔性件。
  9. 一种割草机，包括主体、位于所述主体后方的集草袋及设于所述主体两侧的推杆机构；其特征在于：所述推杆机构为上述权利要求1至9中任一项所述 的推杆机构，所述推杆机构位于所述集草袋的上方。
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