WO2022042315A1 - 拉紧机构 - Google Patents

拉紧机构 Download PDF

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Publication number
WO2022042315A1
WO2022042315A1 PCT/CN2021/112171 CN2021112171W WO2022042315A1 WO 2022042315 A1 WO2022042315 A1 WO 2022042315A1 CN 2021112171 W CN2021112171 W CN 2021112171W WO 2022042315 A1 WO2022042315 A1 WO 2022042315A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
tensioning
rocker arm
belt pressing
connecting gear
Prior art date
Application number
PCT/CN2021/112171
Other languages
English (en)
French (fr)
Inventor
何瑜华
姜水波
Original Assignee
台州市永派包装设备有限公司
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
Priority claimed from CN202010860740.8A external-priority patent/CN114104372A/zh
Priority claimed from CN202021798720.4U external-priority patent/CN214824401U/zh
Priority claimed from CN202022555482.0U external-priority patent/CN215554400U/zh
Priority claimed from CN202011228003.2A external-priority patent/CN114435654A/zh
Priority to JP2023513357A priority Critical patent/JP7492652B2/ja
Priority to EP21860154.0A priority patent/EP4206079A1/en
Priority to KR1020237004284A priority patent/KR102606528B1/ko
Priority to AU2021331964A priority patent/AU2021331964B2/en
Priority to US18/042,917 priority patent/US20230294859A1/en
Application filed by 台州市永派包装设备有限公司 filed Critical 台州市永派包装设备有限公司
Priority to CA3189500A priority patent/CA3189500C/en
Priority to BR112023003325A priority patent/BR112023003325A2/pt
Publication of WO2022042315A1 publication Critical patent/WO2022042315A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/22—Means for controlling tension of binding means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/02—Applying and securing binding material around articles or groups of articles, e.g. using strings, wires, strips, bands or tapes
    • B65B13/025—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B13/00—Bundling articles
    • B65B13/18—Details of, or auxiliary devices used in, bundling machines or bundling tools
    • B65B13/185—Details of tools
    • B65B13/187—Motor means

Definitions

  • the present invention relates to a tensioning mechanism, in particular to a tensioning mechanism of a portable baler.
  • a portable baler is a portable device that can be easily carried to the relevant work point for bundling items.
  • the tightening mechanism is used to tighten the packing belt after wrapping around the item, and its executive mechanism adopts a tightening wheel.
  • the previous hand-held baler adopts a structure with a handle, and the hand-held baler is operated from a tensioned state to a non-tightened state (as a working state of placing or removing the packing belt), and the operation is not automatic enough.
  • the purpose of the present invention is to provide a tensioning mechanism, which is suitable for being installed in a hand-held baler and realizes the handleless operation of the hand-held baler from a tensioned state to a non-tightened state. For this reason, the present invention adopts the following technical solutions:
  • the tensioning mechanism is installed in a portable baler, and the portable baler is provided with a tensioning wheel and a tensioning wheel drive motor; it is characterized in that a gear connection mechanism is provided between the driving motor and the tensioning wheel, and the tensioning
  • the mechanism is also provided with a rotation direction control and rotation angle maintaining mechanism, a back-stop mechanism, and a rocker arm, and the rotation direction control and rotation angle maintaining mechanism is connected with the back-stop mechanism and the rocker arm; the rocker arm is provided with a tension wheel to match
  • the tooth structure is driven by the rotation direction control and the cooperation of the rotation angle maintaining mechanism and the second reset mechanism to drive the rocker arm to rotate and maintain the angle after the rocker arm is rotated in place, so that the tooth structure and the tensioning wheel are in tension.
  • the anti-return mechanism is driven to be in the anti-reverse matching state or disengaged from the anti-reverse matching state, and the gear connection mechanism Connected with the anti-reverse mechanism, when the anti-reverse mechanism is in the anti-reverse matching state, the tensioning wheel can only be driven to rotate in one direction and cannot be reversed.
  • the rotation direction control and rotation angle maintaining mechanism adopts a steering gear.
  • the anti-return mechanism includes a connecting gear of the anti-return mechanism, a ratchet wheel coaxially connected with the connecting gear of the anti-return mechanism, and a pawl matched with the ratchet wheel, and the pawl can be engaged by the first connecting structure and the first connecting gear through cooperation.
  • the first connection gear is driven, the rocker arm can be driven by the second connection gear through the cooperation of the second connection structure and the second connection gear, and the rotation direction control and rotation angle maintaining mechanism drives the first connection gear and the second connection gear. Connect the gears.
  • first connection gear and the second connection gear are meshed and connected to rotate synchronously, and the second connection gear is larger than the first connection gear and has a lower rotational speed than the first connection gear.
  • the second connecting structure includes a driving member driven by the second connecting gear, and a rotating connecting member, the rotating connecting member is provided with an acted part that cooperates with the driving member, and the rotating connecting member is also configured to be connected with the rocker arm. Structure.
  • the rotating connecting piece is further provided with a part connected with the second reset mechanism.
  • the rotating connecting piece is in the shape of a circle, and its rotation center line is collinear with the rotating center line of the tensioning wheel.
  • the gear connecting structure is provided with a planetary gear reduction mechanism, and the circle-shaped rotating connecting piece passes through the bearing. Installed on the planetary gear reduction mechanism.
  • the pawl arm is mounted on the shaft of the second connecting gear and can rotate relative to the shaft of the second connecting gear, and the driving member and the shaft of the second connecting gear are fixedly connected or integrated.
  • the gear connection structure includes a planetary gear reduction mechanism and a connecting gear between the drive motor and the planetary gear reduction mechanism.
  • the planetary gear reduction mechanism can be provided with one or more stages.
  • a preferred embodiment is: the steering gear and the tension wheel drive motor are arranged in parallel, and the steering gear is located above the side of the tension wheel and the tension wheel drive motor; the steering gear passes through the driving gear connected with the first connecting gear, the first connecting gear is meshed with the second connecting gear, the second connecting gear is larger than the first connecting gear and the rotational speed is smaller than that of the first connecting gear;
  • the anti-return mechanism comprises a connecting gear of the anti-return mechanism, a ratchet wheel coaxially connected with the connecting gear of the anti-return mechanism, and a pawl matched with the ratchet wheel.
  • the pawl is connected to the first connecting gear through a first connecting structure, and the rocker arm is The second connecting structure is connected with the second connecting gear;
  • the second connecting structure comprises a driving member driven by the second connecting gear and a rotating connecting member, wherein the rotating connecting member is provided with an actuated portion that cooperates with the driving member, and the rotating connecting member is also provided with a structure connected with the rocker arm;
  • the rotating connecting piece is in the shape of a circle, and its rotation center line is collinear with the rotating center line of the tensioning wheel.
  • the gear connecting structure is provided with a planetary gear reduction mechanism, and the circle-shaped rotating connecting piece is installed on the planet through a bearing.
  • the tension wheel is provided with an inner gear, and the output gear coaxial with the sun gear of the planetary gear reduction mechanism is connected with the inner gear through a connecting gear;
  • the backflow prevention mechanism is arranged before the planetary gear reduction mechanism
  • connection gear of the anti-return mechanism is installed on the shaft of the ratchet through a one-way bearing.
  • the one-way bearing allows the connecting gear of the anti-return mechanism to rotate relative to the ratchet wheel.
  • the connecting gear of the anti-reverse mechanism is prohibited from rotating relative to the ratchet wheel in the opposite direction, but both must rotate together.
  • the ring gear and the sun gear of the planetary gear reduction mechanism are arranged coaxially; the tension wheel and the planetary gear reduction mechanism are arranged close to each other in the axial direction. In order to further reduce the connecting parts and reduce the volume of the machine, it is convenient to use the portable baler.
  • first gear and the sun gear of the planetary gear reduction mechanism are coaxially connected to further simplify the connection structure.
  • first gear and the sun gear could also be connected by an intermediate gear instead of being coaxial.
  • the planetary gear carrier and the planetary gears of the planetary gear reduction mechanism are arranged on the side of the mounting plate facing the drive motor, the rotating shaft of the planetary gear carrier of the planetary gear reduction mechanism is connected with the output gear, and the output gear
  • the inner gear is on its periphery, a plurality of connecting gears surrounding the output gear are arranged between the output gear and the inner gear, and the connecting gear shafts are fixed on the mounting plate.
  • connection gear and the output gear are in a deceleration connection relationship.
  • the tensioning mechanism is provided with a belt pressing mechanism
  • the belt pressing mechanism is arranged on the rocker arm of the hand-held baler
  • the belt pressing mechanism includes a first elastic mechanism and a belt pressing part, the first elastic mechanism Push the belt pressing member downward, and allow the belt pressing member to retract and provide downward return elastic force for the belt pressing member.
  • the height of the lower end of the belt pressing member is lower than the tooth plate set at the bottom of the inner side of the rocker arm Close to the upper end of the side of the pinch mechanism.
  • the belt pressing member adopts rolling bodies.
  • the portable baler is provided with a strap limiting structure on the inner side of the rocker arm.
  • the belt pressing mechanism is provided with a rotatable installation block, the first elastic mechanism and the belt pressing member are arranged in the installation block, and the belt pressing member is allowed to rotate through the rotation of the installation block.
  • the height is adapted to the lifting of the packing belt when the belt is tightened, and the mounting block is connected to the second elastic mechanism.
  • the belt pressing mechanism is provided with a spacer and a connecting screw, the spacer is connected with the mounting block, and the connecting screw connects the mounting block with the rocker arm.
  • the first elastic mechanism adopts a compression spring, an installation hole is arranged inside the installation block, a steel ball is used for the pressure belt part, the compression spring and the steel ball are arranged in the installation hole, and the lower end of the installation hole has an orifice. smaller than the diameter of the steel ball.
  • the second elastic mechanism adopts a torsion spring, and the torsion spring is sleeved between the spacers and connected between the rocker arm and the mounting block.
  • the mounting block is provided with a connecting hole
  • the spacer is provided with a part inserted into the connecting hole, and the connecting screw is connected with the rocker arm through the connecting hole and the spacer;
  • the mounting block is provided with an orthogonal penetration hole.
  • the hole passing through the connection hole is located at the lower part of the connection hole as an installation hole, the belt pressing part adopts steel ball, the compression spring and the steel ball are arranged in the installation hole, and the lower end of the installation hole is smaller than the diameter of the steel ball,
  • the insertion portion of the spacer serves as a support member of the compression spring.
  • the spacer is provided with a portion inserted into the connecting hole and serves as a rotating shaft of the mounting block.
  • a concave area is provided on the outer side of the rocker arm, and the mounting block is correspondingly disposed in the concave area.
  • the present invention has a compact structure and is suitable for use in a hand-held baler, and can realize the handle-free operation of the hand-held baler from a tensioned state to a non-tightened state without operating the handle. Further, for the tensioning mechanism that adopts the exclusive drive motor of the tensioning wheel, the worm gear structure is avoided, and the compact assembly relationship of adjacent and concentric accommodating can be realized, and the volume is reduced, so that the planetary gear is suitable for use in portable balers.
  • the anti-return mechanism is used and configured in the limited and applicable space, and the volume is small, which can be conveniently used by the user and has low energy consumption.
  • FIG. 1 is a schematic perspective view of an embodiment of the present invention.
  • FIG. 2 is a schematic perspective view of another angle of the embodiment of the present invention.
  • Figure 3 is a front view of the embodiment of the present invention with the motor mounts hidden.
  • Figure 4 is an exploded view of the anti-reverse mechanism and its surrounding structures.
  • Figure 5 is an exploded view of the anti-reverse mechanism and the planetary gear mechanism.
  • FIG. 6 is an exploded view of an embodiment of a portable baler applying the present invention.
  • FIG. 7 is a schematic diagram of an embodiment of a handleless hand-held baler applying the belt pressing mechanism of the present invention
  • FIG. 8 is a front view of the swing arm provided with the belt pressing mechanism in the embodiment shown in FIG. 7 .
  • FIG. 9 is a perspective view of the swing arm provided with the belt pressing mechanism in the embodiment shown in FIG. 7 .
  • FIG. 10 is an exploded view of the structure shown in FIG. 9 .
  • the present invention provides a tensioning mechanism, which is installed in a hand-held baler, and the portable baler is provided with a tensioning wheel 100 and a driving motor 200 for the tensioning wheel.
  • the drive motor 200 is mounted on its mounting plate 203 , and the mounting plate 203 is fixedly connected to the mounting seat 400 .
  • a gear connection mechanism is provided between the drive motor 200 and the tensioning wheel 100 , and the gear connection structure includes a planetary gear reduction mechanism and a connection gear between the drive motor 200 and the planetary gear reduction mechanism.
  • the tensioning mechanism is also provided with a rotation direction control and rotation angle maintaining mechanism, a back-stop mechanism, and a rocker arm 300 , and the rotation direction control and rotation angle maintaining mechanism may use a steering gear 6 .
  • the steering gear 6 is connected with the anti-return mechanism and the rocker arm 300, and the rocker arm 300 is rotatably mounted on the mounting seat 400 and is located at the periphery of the tension wheel 100; the rocker arm 300 is provided with the tension wheel
  • the tooth structure 301 matched with 100 through the cooperation of the steering gear 6 and the second reset mechanism, drives the rocker arm 300 to rotate and maintains the angle after the rocker arm 300 is rotated in place, wherein the second reset mechanism uses a compression spring 62 to make
  • the tooth structure 301 and the tensioning wheel 100 are in a state of tightening and matching or loosening; through the cooperation of the steering gear 6 and the first reset mechanism, the anti-return mechanism is driven to be in a state of anti-reverse matching or disengaged to prevent the
  • the first reset mechanism adopts the compression spring 61, and the gear connecting mechanism is connected with the anti-return mechanism.
  • the anti-return mechanism is in the anti-reverse matching state, the tensioning wheel 100 can only be driven to rotate in one direction and cannot be reversed.
  • the one-way direction is the direction of rotation in which the strapping is tensioned.
  • the anti-return mechanism includes a connecting gear 21 of the anti-return mechanism, a ratchet wheel 22 coaxially connected to the connecting gear 21 of the anti-return mechanism, and a pawl 23 that cooperates with the ratchet wheel.
  • the pawl 23 cooperates with the first connecting gear 71 through the first connecting structure. While being able to be driven by the first connection gear, the rocker arm 300 can be driven by the second connection gear through the cooperation of the second connection structure and the second connection gear 72 .
  • the steering gear 6 and the tension wheel drive motor 200 are arranged in parallel, and the steering gear 6 is located above the side of the tension wheel 100 and the tension wheel drive motor 200;
  • the gear 71 is connected, the first connecting gear 71 is meshed with the second connecting gear 72, the axes of the driving gear 73, the first connecting gear 71 and the second connecting gear 72 are parallel to the axis of the tensioning wheel, and the pawl arm 230 is arranged on the first
  • the two connecting gears 72 are on the shaft 720 and can rotate relative to the shaft 720 of the second connecting gear 72.
  • the first connecting gear 71 and the second connecting gear 72 rotate synchronously, and the second connecting gear 72 is larger than the first connecting gear 71.
  • the rotation speed is smaller than that of the first connecting gear 71, which makes the center of gravity of the portable baler more stable, the action of the pawl 23 is more sensitive, and the rocker arm 300 has a suitable rotation angle; and the first connecting gear 71 is also larger than the driving gear. deceleration coordination.
  • the first connecting structure includes a first cam 711 on the first connecting gear shaft 710 and a second cam 231 provided on the pawl arm 230.
  • the first cam 711 and the second cam 231 cooperate with each other, and the pawl arm 230 Connected with the return spring 61, the forward rotation of the steering gear 6 drives the pawl from the ratchet wheel through the above-mentioned cam cooperation.
  • the second cam 231 abut against the first cam 711 .
  • Both ends of the shaft 220 of the ratchet 22 are respectively mounted on the mounting plate 203 and the mounting seat 400 through the bearing 25 .
  • the connecting gear 21 is installed on the shaft of the ratchet wheel 22 through a one-way bearing 27, and the direction of the one-way bearing 27 is: when the tensioning mechanism is tightening, the connecting gear 21 is allowed to be driven by the first gear 1 relative to the ratchet wheel 22. Rotation, when the tension wheel drive motor 200 stops rotating, the connecting gear 21 is prohibited from rotating relative to the ratchet in the opposite direction, and both must be rotated together.
  • the second connecting structure includes a driving member 721 driven by the second connecting gear, and a rotating connecting member 8.
  • the rotating connecting member 8 is provided with an actuated portion 81 that cooperates with the driving member 721.
  • the driving member 721 and the shaft 720 of the second connecting gear 72 are fixedly connected or integrated, and the forward rotation of the steering gear causes the rotating connecting member 8 to rotate through the action of the driving member 721 on the acted part 81 .
  • the rocker arm 300 can be provided with a bayonet 302 which is matched with the structure 82 .
  • the rotating connecting member 8 is in the shape of a circle, and its rotation center line is collinear with the rotating center line of the tensioning wheel 100 . Since the steering gear 6 is located obliquely above the tensioning wheel 100 , since the driving gear 73 , the first connecting gear 71 and the second connecting gear 72 are parallel to the axis of the tensioning wheel, the shaft 720 of the second connecting gear 72 is arranged in a circle in parallel. Rotate the top of the connecting piece 8, so that the driving piece 721 above the ring-shaped rotating connecting piece 8 utilizes the feature that its rotation diameter is smaller than the diameter of the ring-shaped rotating connecting piece 8, so that the rotation angle of the rocker arm can be rotated by a smaller angle, Improve work speed and machine precision.
  • the tension wheel 100 is provided with an inner gear 101, and the output gear 4 and the inner gear 101 coaxial with the sun gear 31 of the planetary gear reduction mechanism are connected by a connecting gear 5; the inner gear 101 and the planetary gear
  • the sun gears 31 of the reduction mechanism are arranged concentrically, and their rotation centers are on the same axis; the tension wheel 100 and the planetary gear reduction mechanism are arranged in close proximity to each other in the axial direction.
  • the anti-return mechanism is arranged in front of the planetary gear reduction mechanism, and a driving gear 202 is arranged on the output shaft 201 of the driving motor 200.
  • the driving gear 202 is meshed with the first gear 1, and the relationship is a reduction connection relationship; the first The gear 1 is just before the planetary gear reduction mechanism, the first gear 1 is connected with the planetary gear reduction mechanism, and the first gear 1 is also in driving connection with the anti-return mechanism (mesh connection with the connecting gear 21 ).
  • the shafts of the first gear 1 and the sun gear 31 of the planetary gear reduction mechanism are the same shaft or a whole, and the shaft is mounted on the mounting seat 400 through the bearing 11 .
  • the present invention also provides an embodiment of a deceleration mechanism with a simple structure and convenient assembly and a small volume.
  • the planetary gear deceleration mechanism includes the sun gear 31, three planetary gears 32, a planetary gear carrier 33 and an inner gear ring 34.
  • the inner gear ring 34 is arranged on the mounting plate 500, the mounting plate 500 is fixed on the mounting seat 400, the gear shafts of the three planetary gears 32 are mounted on the planetary gear carrier 33, and the rotating shaft 35 of the planetary gear carrier 33 passes through the mounting on the mounting plate 500.
  • the holes are rotatably mounted on the mounting plate 500 .
  • the planetary gear carrier 33 and the planetary gears 32 are arranged on the side of the mounting plate 500 facing the drive motor 200 , and the rotating shaft 35 of the planetary gear carrier 33 of the planetary gear reduction mechanism is connected with the output gear 4 .
  • the ring gear 101 is located at the periphery of the output gear 4 , and there are a plurality of connecting gears 5 .
  • the shaft of the connecting gear 5 is fixed on the mounting plate 500 Above, the number of connecting gears 5 is generally three.
  • the connection gear 5 and the output gear 4 are also in a deceleration connection relationship.
  • the belt pressing mechanism 601 provided in this embodiment is arranged on the rocker arm 300 of the portable baler, and the reference numeral 100 is the tension wheel of the portable baler.
  • the rocker arm 300 is bent to surround the tension wheel on the side of the tension wheel 100 100 setting, a toothed plate 301 is set at the inner bottom of the rocker arm 300. After the rocker arm 300 is rotated to close with the tensioning wheel 100, the toothed plate 301 cooperates with the tensioning wheel 100 to jam the packing belt 300. When the wheel 100 rotates, the packing belt 700 is pulled to the right (based on the placement position of the hand-held baler in FIG. 7 ).
  • the belt pressing mechanism includes a first elastic mechanism and a belt pressing component, the first elastic component adopts a compression spring 610, and the belt pressing component adopts a steel ball 601, which is convenient for installation and has a small frictional resistance to the packing belt 700;
  • the compression spring 610 pushes the steel ball 601 downward, and allows the steel ball 601 to retract and provides a downward restoring force for the steel ball 601.
  • the height of the lower end of the steel ball 601 is lower than the tooth plate 301 provided at the bottom of the inner side of the swing arm.
  • the belt pressing member (steel ball 601) can press the packing belt 700 downward,
  • the rocker arm 300 is rotated in the closing direction, the state of the packing tape 700 can be effectively maintained and prevented from falling out.
  • the hand-held baler is provided with a packing belt limit structure on the inner side of the rocker arm, which can ensure that the position of the packing belt 700 in the width direction is appropriate when it is put in, and is convenient for the belt pressing part to play the role of pressing the belt.
  • Structures such as limit block 605 or limit plate are adopted.
  • the belt pressing mechanism is provided with a rotatable mounting block 602, and the rotation axis of the mounting block 602 is orthogonal to the rotation axis of the rocker arm 300.
  • the belt pressing member (steel ball 601) on the mounting block 602 changes in height
  • the belt pressing part is adapted to the lifting of the packing belt when the belt is tightened at the vacated height, so that the belt pressing and the tightening process of the hand-held baler are more coordinated, which not only ensures the pressure Belt effect, but also makes the process of tightening the belt smooth.
  • the mounting block 602 is provided with a mounting hole 621 , the compression spring 610 and the steel ball 601 are provided in the mounting hole 621 , and the lower end hole 6211 of the mounting block 621 is smaller than the diameter of the steel ball 601 .
  • the belt pressing mechanism is provided with a spacer 603 and a connecting screw 604, the spacer 603 has an insertion end 631, the mounting block 602 is provided with a connection hole 623, the insertion end 631 is inserted into the connection hole 623, and the screw 604 It is connected to the rocker arm 300 through the connection hole 623 and the spacer 603, and the reference numeral 304 is the screw connection hole on the swing arm that is matched with the screw 604; the mounting block 602 is provided with an orthogonal pass through the connection hole 623
  • the hole at the lower part of the connection hole is used as the installation hole 621, and the upper hole 622 is used as the through hole for installing the compression spring 610 and the steel ball 601. After assembly, it can be blocked with a stuffy cover.
  • the insertion end 631 of the spacer serves as the rotation axis of the mounting block 602 and serves as the support member of the compression spring 610 .
  • the mounting block 602 is connected to a second elastic mechanism, and the second elastic mechanism adopts a torsion spring 620 , the torsion spring 620 is sheathed between the spacers 603 and connected between the rocker arm 300 and the mounting block 602 .
  • a concave area 305 is provided on the outer side of the rocker arm 300 , and the mounting block 601 is correspondingly disposed in the concave area 305 to facilitate the setting of the belt pressing member.
  • the belt pressing mechanism is adopted, which can prevent the packing belt from falling out to the outside through a certain degree of belt pressure when the swing arm and the tensioning wheel are closed, and when the packing belt is stretched and the packing belt is lifted up , which can adapt and elastically give way without hindering the work of the tensioning belt, which is helpful for the automatic operation of the portable baler.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Basic Packing Technique (AREA)
  • Retarders (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Jib Cranes (AREA)
  • Golf Clubs (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

一种拉紧机构，其安装在手提打包机中，打包机设置拉紧轮（100）、拉紧轮驱动电机（200），驱动电机和拉紧轮之间设置有齿轮连接机构，拉紧机构设置有旋转方向控制和旋转角度保持机构、止逆机构以及摇臂（300），旋转方向控制和旋转角度保持机构与止逆机构和摇臂连接，摇臂上设置与拉紧轮（100）配合的齿结构（301）。通过旋转方向控制和旋转角度保持机构和第二复位机构的配合而驱动摇臂转动及保持摇臂转动到位后的角度，以使齿结构和拉紧轮处于拉紧配合状态或松开状态；通过旋转方向控制和旋转角度保持机构和第一复位机构的配合，驱动止逆机构处于止逆配合状态或脱开止逆配合状态，齿轮连接机构和止逆机构连接，在止逆机构处于止逆配合状态时，拉紧轮只能被单向驱动转动而不能倒转。该拉紧机构使得无需操作手柄即能实现打包带在拉紧状态与非拉紧状态之间的转换。

Description

拉紧机构 技术领域
本发明涉及拉紧机构，尤其涉及手提打包机的拉紧机构。
背景技术
手提打包机是一种便携式设备，用于方便地携带到相关工作点捆扎物品。其中的拉紧机构用于把打包带在绕物品一圈后拉紧打包带，其执行机构采用拉紧轮。以往的手提打包机采用有手柄的结构，通过操作手柄使手提打包机从拉紧状态进入到非拉紧状态(作为放打包带或移出打包带的工作状态)，操作不够自动化。
发明内容
本发明的目的是提供一种拉紧机构，适用于安装在手提打包机中应用，实现手提打包机从拉紧状态进入到非拉紧状态的无手柄操作。为此，本发明采用以下技术方案：
拉紧机构，安装在手提打包机中，所述手提打包机设置拉紧轮、拉紧轮驱动电机；其特征在于所述驱动电机和拉紧轮之间设置有齿轮连接机构，所述拉紧机构还设置有旋转方向控制和旋转角度保持机构、止逆机构、摇臂，所述旋转方向控制和旋转角度保持机构与止逆机构和摇臂连接；所述摇臂上设置与拉紧轮配合的齿结构，通过所述旋转方向控制和旋转角度保持机构和第二复位机构的配合而驱动摇臂转动及保持摇臂转动到位后的角度，以使所述齿结构和拉紧轮处于拉紧配合状态或松开状态；通过所述旋转方向控制和旋转角度保持机构和第一复位机构的配合，驱动所述止逆机构处于止逆配合状态或脱开止逆配合状态，所述齿轮连接机构和止逆机构连接，在止逆机构处于止逆配合状态时，拉紧轮只能被单向驱动转动而不能倒转，所述单向为使打包带被拉紧的旋转方向。
所述旋转方向控制和旋转角度保持机构采用舵机。
进一步地，所述止逆机构包括止逆机构连接齿轮、和止逆机构连接齿轮同轴连接的棘轮以及和棘轮配合的棘爪，棘爪通过第一连接结构和第一连接齿轮配合而能被第一连接齿轮驱动，所述摇臂通过第二连接结构和第二连接齿轮配合而能被第二连接齿轮驱动，所述旋转方向控制和旋转角度保持机构驱动所述第一连接齿轮、第二连接齿轮。
进一步地，所述第一连接齿轮和第二连接齿轮啮合连接而同步转动，第二连接齿轮比第一连接齿轮大而转速比第一连接齿轮小。
进一步地，所述第二连接结构包括被第二连接齿轮驱动的驱动件、转动连接件，所述转动连接件设置与主动件配合的被作用部位，所述转动连接件还设置与摇臂连接的结构。所述转动连接件还进一步设置与第二复位机构连接的部位。
进一步地，所述转动连接件呈圈状，其转动中心线和拉紧轮的转动中心线共线，所述齿轮连接结构中设置有行星齿轮减速机构，圈状的所述转动连接件通过轴承安装在行星齿轮减速机构上。
进一步地，所述棘爪臂被安装在第二连接齿轮的轴上并能相对第二连接齿轮的轴转动，所述主动件和第二连接齿轮的轴固定连接或为一体。
进一步地，所述齿轮连接结构中含有行星齿轮减速机构以及驱动电机和行星齿轮减速机构之间的连接齿轮。行星齿轮减速机构可以设置一级或多级。
进一步地，一种优选的实施方式为：所述舵机和拉紧轮驱动电机平行布置，所述舵机处在拉紧轮和拉紧轮驱动电机的侧上方；所述舵机通过主动齿轮和第一连接齿轮连接，第一连接齿轮再和第二连接齿轮啮合连接，第二连接齿轮比第一连接齿轮大而转速比第一连接齿轮小；
所述止逆机构包括止逆机构连接齿轮、和止逆机构连接齿轮同轴连接的棘轮以及和棘轮配合的棘爪，棘爪通过第一连接结构和第一连接齿轮连接，所述摇臂通过第二连接结构和第二连接齿轮连接；
所述第二连接结构包括被第二连接齿轮驱动的驱动件、转动连接件，所述转 动连接件设置与主动件配合的被作用部位，所述转动连接件还设置与摇臂连接的结构；
所述转动连接件呈圈状，其转动中心线和拉紧轮的转动中心线共线，所述齿轮连接结构中设置有行星齿轮减速机构，圈状的所述转动连接件通过轴承安装在行星齿轮减速机构的安装盘上，所述拉紧轮设置内齿圈，与行星齿轮减速机构的太阳齿轮同轴的输出齿轮与内齿圈之间通过连接齿轮连接；
所述止逆机构设置在行星齿轮减速机构之前；
止逆机构连接齿轮通过单向轴承安装在棘轮的轴上，当拉紧机构进行拉紧工作时，所述止逆机构处于止逆配合状态，在对应拉紧轮拉紧转动方向上，所述单向轴承允许止逆机构连接齿轮相对于棘轮转动，当拉紧轮驱动电机停止转动时，在反方向禁止止逆机构连接齿轮相对于棘轮转动而必须两者一起转动。
进一步地，所述内齿圈与行星齿轮减速机构的太阳齿轮同轴线设置；所述拉紧轮和行星齿轮减速机构在轴向上前后靠近地布置。以能够进一步减少连接部件并减小机器的体积，便于手提打包机的使用。
进一步地，所述第一齿轮和行星齿轮减速机构的太阳齿轮同轴连接在一起，以进一步简化连接结构。作为替代的，第一齿轮和太阳齿轮也可通过中间齿轮进行连接而非同轴。
进一步地，所述行星齿轮减速机构的行星齿轮架和行星齿轮设置在安装盘面向驱动电机这一侧，所述行星齿轮减速机构的行星齿轮架的转轴与所述输出齿轮连接，所述输出齿轮处在安装盘的另一侧，所述内齿圈就处在其外围，所述输出齿轮与内齿圈之间设置多个围绕输出齿轮的连接齿轮，连接齿轮轴固定在安装盘上。
进一步地，所述连接齿轮与输出齿轮之间为减速连接关系。
进一步地，所述拉紧机构设置有压带机构，所述压带机构设置在手提打包机的摇臂上，所述压带机构包括第一弹性机构和压带部件，所述第一弹性机构将所 述压带部件向下顶，并允许所述压带部件回缩及为所述压带部件提供向下复位弹力，所述压带部件下端的高度低于摇臂内侧底部设置的齿板靠近压带机构这一侧的上端。
进一步地，所述压带部件采用滚动体。
进一步地，所述手提打包机在摇臂的内侧设置打包带限位结构。
进一步地，所述压带机构设置能够可转动的安装块，所述第一弹性机构和压带部件设置在所述安装块中，通过所述安装块的转动来使得所述压带部件在让位高度上适应在拉紧带时的打包带上抬，所述安装块连接第二弹性机构。
进一步地，所述压带机构设置隔套、连接螺丝，所述隔套和安装块连接，所述连接螺丝将所述安装块与所述摇臂连接。
进一步地，所述第一弹性机构采用压簧，所述安装块内部设置安装孔，所述压带部件采用钢珠，所述压簧和钢珠设置在安装孔内，所述安装孔的下端孔口小于钢珠的直径。
进一步地，所述第二弹性机构采用扭簧，所述扭簧套在所述隔套之间并连接在摇臂和安装块之间。
进一步地，所述安装块设置连接孔，所述隔套设置插入到连接孔中的部分，所述连接螺丝穿过连接孔和隔套而与摇臂连接；所述安装块设置有正交穿过所述连接孔的孔，处于连接孔下部的作为安装孔，所述压带部件采用钢珠，所述压簧和钢珠设置在安装孔内，所述安装孔的下端孔口小于钢珠的直径，所述隔套的插入部分作为所述压簧的支撑部件。
进一步地，所述隔套设置插入到连接孔中的部分并作为所述安装块的转动轴。
进一步地，所述摇臂的外侧设置有凹区，所述安装块对应在所述凹区中设置。
由于采用本发明的技术方案，本发明结构紧凑，适于应用于手提打包机，无需操作手柄即实现手提打包机从拉紧状态进入到非拉紧状态的无手柄操作。进一步地，对于采用拉紧轮专属驱动电机的拉紧机构，避免了采用蜗轮蜗杆结构，同 时可以实现相邻和同心包容的紧凑装配关系，减小体积，使行星齿轮适于在手提打包机所限定和适用的空间中使用并配置止逆机构，体积小并能供使用者方便的手提使用且能耗小。
以下结合附图和具体实施方式对本发明作进一步的详细说明。
附图说明
图1为本发明实施例的立体示意图。
图2为本发明实施例的另一个角度的立体示意图。
图3为在隐去电机安装座后的本发明实施例的正视图。
图4为止逆机构及其周围结构的爆炸图。
图5为止逆机构和行星齿轮机构的爆炸图。
图6为应用本发明的手提打包机实施例的爆炸图。
图7为应用本发明压带机构的无手柄手提打包机实施例的示意图
图8为图7所示本实施例中设置压带机构的摆臂的主视图。
图9为图7所示本实施例中设置压带机构的摆臂的立体图。
图10为图9所示结构的爆炸图。
具体实施方式
参照附图1‐6。本发明提供了拉紧机构，安装于手提打包机中应用，所述手提打包机设置拉紧轮100、拉紧轮驱动电机200。驱动电机200安装在其安装板203上，安装板203和安装座400固定连接。所述驱动电机200和拉紧轮100之间设置有齿轮连接机构，所述齿轮连接结构中含有行星齿轮减速机构以及驱动电机200和行星齿轮减速机构之间的连接齿轮。
所述拉紧机构还设置有旋转方向控制和旋转角度保持机构、止逆机构、摇臂300，所述旋转方向控制和旋转角度保持机构可采用舵机6。所述舵机6与止逆机构和摇臂300连接，所述摇臂300可转动地安装在安装座400上并处在拉紧轮100的外围；所述摇臂300上设置与拉紧轮100配合的齿结构301，通过所述舵 机6和第二复位机构的配合而驱动摇臂300转动及保持摇臂300转动到位后的角度，其中，第二复位机构采用压簧62，以使所述齿结构301和拉紧轮100处于拉紧配合状态或松开状态；通过所述舵机6和第一复位机构的配合，驱动所述止逆机构处于止逆配合状态或脱开止逆配合状态，其中，第一复位机构采用压簧61，所述齿轮连接机构和止逆机构连接，在止逆机构处于止逆配合状态时，拉紧轮100只能被单向驱动转动而不能倒转，所述单向为使打包带被拉紧的旋转方向。
所述止逆机构包括止逆机构连接齿轮21、和止逆机构连接齿轮21同轴连接的棘轮22以及和棘轮配合的棘爪23，棘爪23通过第一连接结构和第一连接齿轮71配合而能够被第一连接齿轮驱动，所述摇臂300通过第二连接结构和第二连接齿轮72配合而能够被第二连接齿轮驱动。
所述舵机6和拉紧轮驱动电机200平行布置，所述舵机6处在拉紧轮100和拉紧轮驱动电机200的侧上方；所述舵机6通过主动齿轮73和第一连接齿轮71连接，第一连接齿轮71再和第二连接齿轮72啮合连接，主动齿轮73、第一连接齿轮71和第二连接齿轮72的轴线与拉紧轮轴线平行，棘爪臂230设置在第二连接齿轮72的轴720上，并能相对于第二连接齿轮72的轴720转动，第一连接齿轮71和第二连接齿轮72同步转动，第二连接齿轮72比第一连接齿轮71大而转速比第一连接齿轮71小，使得手提打包机的重心更稳，棘爪23的动作更加灵敏而摇臂300具有合适的转动角度；并且，第一连接齿轮71也比主动齿轮大，也为减速配合关系。
所述第一连接结构包括在第一连接齿轮轴710上的第一凸轮711和设置在棘爪臂230上的第二凸轮231，第一凸轮711和第二凸轮231相配合，棘爪臂230与复位弹簧61连接，所述舵机6的正转通过上述凸轮配合对棘爪脱离棘轮起到驱动作用，复位弹簧61不仅用于驱动棘爪23复位而和棘轮23形成啮合配合，同时也用于使第二凸轮231靠向第一凸轮711。
棘轮22的轴220的两端分别通过轴承25安装于安装板203和安装座400 上。连接齿轮21通过单向轴承27安装在棘轮22的轴上，单向轴承27的方向为：当拉紧机构进行拉紧工作时，允许连接齿轮21在第一齿轮1的带动下相对于棘轮22转动，当拉紧轮驱动电机200停止转动时，在反方向禁止连接齿轮21相对于棘轮转动而必须两者一起转动。
所述第二连接结构包括被第二连接齿轮驱动的驱动件721、转动连接件8，所述转动连接件8设置与驱动件721配合的被作用部位81，所述转动连接件还设置与摇臂连接的结构82以及与第二复位机构连接的部位83。所述驱动件721和第二连接齿轮72的轴720固定连接或为一体，所述舵机的正转，通过驱动件721对被作用部位81的作用，使得转动连接件8产生转动，该转动通过与摇臂连接的结构82，而使得摇臂300产生向着松开方向运动一个角度，摇臂300可设置一个和结构82配合的卡口302。所述舵机的反转时，驱动件721反向转动而让位，通过压簧62的作用，而使得转动连接件8反向转动，通过与摇臂连接的结构82，而使得摇臂300产生向着拉紧方向运动一个角度，使所述齿结构301和拉紧轮100处于拉紧配合状态。
所述转动连接件8呈圈状，其转动中心线和拉紧轮100的转动中心线共线，圈状的所述转动连接件8通过轴承安装在行星齿轮减速机构的安装盘500上。由于舵机6处在拉紧轮100的斜上方，由于主动齿轮73、第一连接齿轮71和第二连接齿轮72与拉紧轮轴线平行，第二连接齿轮72的轴720平行布置在圈状转动连接件8的上方，使得驱动件721在圈状转动连接件8的上方利用其转动直径比圈状转动连接件8的直径小的特点，而使摇臂转动角度可以转动较小的角度，提高工作速度和机器的精密性。
所述拉紧轮100设置内齿圈101，与行星齿轮减速机构的太阳齿轮31同轴线的输出齿轮4与内齿圈101之间通过连接齿轮5连接；所述内齿圈101与行星齿轮减速机构的太阳齿轮31同心设置，它们的转动中心处在同一轴线上；所述拉紧轮100和行星齿轮减速机构在轴向上前后靠近地布置。
所述止逆机构设置在行星齿轮减速机构前，所述驱动电机200的输出轴201上设置主动齿轮202，所述主动齿轮202和第一齿轮1啮合连接，其关系为减速连接关系；第一齿轮1就处于行星齿轮减速机构前，所述第一齿轮1和行星齿轮减速机构连接，并且第一齿轮1还和所述止逆机构传动连接(与连接齿轮21啮合连接)。
所述第一齿轮1和行星齿轮减速机构的太阳齿轮31的轴是同一根轴或为一整体，该轴通过轴承11安装在安装座400上。
本发明还提供了一种结构简单便于装配体积小的减速机构的实施方式，行星齿轮减速机构包括所述太阳齿轮31、3个行星齿轮32、行星齿轮架33和内齿环34，内齿环34设置在安装盘500上，安装盘500固定在安装座400上，其中3个行星齿轮32的齿轮轴安装在行星齿轮架33上，行星齿轮架33的转轴35穿过安装盘500上的安装孔并可转动地安装在安装盘500上。行星齿轮架33和行星齿轮32设置在安装盘500面向驱动电机200的这一侧，所述行星齿轮减速机构的行星齿轮架33的转轴35与所述输出齿轮4连接，所述输出齿轮4处在安装盘500的另一侧，所述内齿圈101就处在输出齿轮4外围，所述连接齿轮5有多个，围绕所述输出齿轮4周围，连接齿轮5的轴固定在安装盘500上，连接齿轮5的数量一般为3个。所述连接齿轮5与输出齿轮4之间也为减速连接关系。
以下实施例参照附图7-10。
本实施例所提供的压带机构601设置在手提打包机的摇臂300上，附图标号100为手提打包机的拉紧轮，摇臂300弯曲而在拉紧轮100一侧围绕拉紧轮100设置，摇臂300内侧底部设置齿板301，在摇臂300转动到和拉紧轮100之间闭合后，所述齿板301与拉紧轮100配合，卡住打包带300，在拉紧轮100转动的情况下，向右拉紧打包带700(以图7中手提打包机摆放位置为基准)。
所述压带机构包括第一弹性机构和压带部件，所述第一弹性部件采用压簧610，所述压带部件采用钢珠601，既便于安装，同时对打包带700的摩擦阻力 也小；所述压簧610将所述钢珠601向下顶，并允许所述钢珠601回缩及为所述钢珠601提供向下复位弹力，钢珠601下端的高度低于摆臂内侧底部设置的齿板301的靠近压带机构这一侧的上端303，当弯曲的摇臂300和拉紧轮100处于打开状态，有打包带700放入时，压带部件(钢珠601)能够向下压打包带700，当摇臂300向闭合方向转动时，能够有效保持打包带700的状态，避免其向外掉出。
所述手提打包机在摇臂的内侧设置打包带限位结构，能够保证打包带700放入时在宽度方向上的位置合适，便于压带部件发挥压带作用，所述打包带限位结构可采用限位块605或限位板等结构。
所述压带机构设置能够转动的安装块602，安装块602的转动轴线与摇臂300的转动轴线正交，通过该转动，安装块602上的压带部件(钢珠601)在高度上变化，通过所述安装块602的转动来使得所述压带部件在让位高度上适应在拉紧带时的打包带上抬，使得压带和手提打包机的拉紧带过程更加协调，既保证压带效果，同时也使得拉紧带过程顺畅。
所述安装块602设置安装孔621，所述压簧610和钢珠601设置在所述安装孔621中，所述安装,621的下端孔口6211小于钢珠601的直径。
所述压带机构设置隔套603、连接螺丝604，所述隔套603具有插入端631，所述安装块602设置连接孔623，所述插入端631与连接孔623插接，所述螺丝604穿过连接孔623和隔套603而与摇臂300连接，附图标号304为摆臂上的与螺丝604配合的螺丝连接孔；所述安装块602设置有正交穿过所述连接孔623的孔，处于连接孔下部的作为安装孔621，上部的孔622作为安装压簧610、钢珠601时的过孔，在组装后，可以用闷盖堵住。所述隔套的插入端631作为所述安装块602的转动轴并作为所述压簧610的支撑部件。
所述安装块602连接第二弹性机构，所述第二弹性机构采用扭簧620，所述扭簧620套在所述隔套603之间并连接在摇臂300和安装块602之间。
所述摇臂300的外侧设置有凹区305，所述安装块601对应在所述凹区305中设置，便于压带部件的设置。
本实施例中采用压带机构，能够在摆臂和拉紧轮之间闭合时，通过一定程度的压带而防止打包带向外侧掉出，而且，在拉紧打包带而打包带上抬时，能够适应性地弹性让位，不妨碍拉紧带工作，有助于手提打包机实现操作自动化。
以上所述仅为本发明的具体实施例，但本发明的结构特征并不局限于此，任何本领域的技术人员在本发明的领域内，所作的变化或修饰皆涵盖在本发明的保护范围之中。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含。术语“安装”、“设置”、“设有”、“连接”、“相连”、“套接”应做广义理解。例如，可以是固定连接，可拆卸连接，或整体式构造；可以是机械连接，或电连接；可以是直接相连，或者是通过中间媒介间接相连，又或者是两个装置、元件或组成部分之间内部的连通。对于本领域普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明的描述中，需要理解的是，术语“一端”、“另一端”、“外侧”、“内侧”、“水平”、“端部”、“长度”、“外端”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是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或元件必须具有特定的方位、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。用语“第一”、“第二”也仅为说明时的简洁而采用，并不是指示或暗示相对重要性。
此外，在实践本发明的权利要求时，通过对附图、公开和所附权利要求的研究中，本领域技术人员可以理解和影响对所公开的实施例的变化。此外，在权利要求中，“包括”、“含有”等词不排除其他元素或步骤，非复数名词不排除其复数形式。

Claims (20)

  1. 拉紧机构，安装在手提打包机中，所述手提打包机设置拉紧轮、拉紧轮驱动电机；其特征在于所述驱动电机和拉紧轮之间设置有齿轮连接机构，所述拉紧机构还设置有旋转方向控制和旋转角度保持机构、止逆机构、摇臂，所述旋转方向控制和旋转角度保持机构与止逆机构和摇臂连接；所述摇臂上设置与拉紧轮配合的齿结构，通过所述旋转方向控制和旋转角度保持机构和第二复位机构的配合而驱动摇臂转动及保持摇臂转动到位后的角度，以使所述齿结构和拉紧轮处于拉紧配合状态或松开状态；通过所述旋转方向控制和旋转角度保持机构和第一复位机构的配合，驱动所述止逆机构处于止逆配合状态或脱开止逆配合状态，所述齿轮连接机构和止逆机构连接，在止逆机构处于止逆配合状态时，拉紧轮只能被单向驱动转动而不能倒转，所述单向为使打包带被拉紧的旋转方向。
  2. 如权利要求1所述的拉紧机构，其特征在于所述旋转方向控制和旋转角度保持机构采用舵机。
  3. 如权利要求1或2所述的拉紧机构，其特征在于所述止逆机构包括止逆机构连接齿轮、和止逆机构连接齿轮同轴连接的棘轮以及和棘轮配合的棘爪，棘爪通过第一连接结构和第一连接齿轮配合而能被第一连接齿轮驱动，所述摇臂通过第二连接结构和第二连接齿轮配合而能被第二连接齿轮驱动，所述旋转方向控制和旋转角度保持机构驱动所述第一连接齿轮、第二连接齿轮。
  4. 如权利要求3所述的拉紧机构，其特征在于所述第一连接齿轮和第二连接齿轮啮合连接而同步转动，第二连接齿轮比第一连接齿轮大而转速比第一连接齿轮小。
  5. 如权利要求3所述的拉紧机构，其特征在于所述第一连接结构包括在第一连接齿轮轴上的第一凸轮和设置在棘爪臂上的第二凸轮，第一凸轮和第二凸轮相配合，棘爪臂与第一复位机构连接。
  6. 如权利要求5所述的拉紧机构，其特征在于所述第二连接结构包括被第二 连接齿轮驱动的驱动件、转动连接件，所述转动连接件设置与主动件配合的被作用部位，所述转动连接件还设置与摇臂连接的结构。
  7. 如权利要求6所述的拉紧机构，其特征在于所述转动连接件设置与第二复位机构连接的部位。
  8. 如权利要求6所述的拉紧机构，其特征在于所述转动连接件呈圈状，其转动中心线和拉紧轮的转动中心线共线，所述齿轮连接结构中设置有行星齿轮减速机构，圈状的所述转动连接件通过轴承安装在行星齿轮减速机构上。
  9. 如权利要求5所述的拉紧机构，其特征在于所述棘爪臂被安装在第二连接齿轮的轴上并能相对第二连接齿轮的轴转动，所述主动件和第二连接齿轮的轴固定连接或为一体。
  10. 如权利要求3所述的拉紧机构，其特征在于所述舵机和拉紧轮驱动电机平行布置，所述舵机处在拉紧轮和拉紧轮驱动电机的侧上方；所述舵机通过主动齿轮和第一连接齿轮连接，第一连接齿轮再和第二连接齿轮啮合连接，第二连接齿轮比第一连接齿轮大而转速比第一连接齿轮小；
    所述止逆机构包括止逆机构连接齿轮、和止逆机构连接齿轮同轴连接的棘轮以及和棘轮配合的棘爪，棘爪通过第一连接结构和第一连接齿轮连接，所述摇臂通过第二连接结构和第二连接齿轮连接；
    所述第二连接结构包括被第二连接齿轮驱动的驱动件、转动连接件，所述转动连接件设置与主动件配合的被作用部位，所述转动连接件还设置与摇臂连接的结构；
    所述转动连接件呈圈状，其转动中心线和拉紧轮的转动中心线共线，所述齿轮连接结构中设置有行星齿轮减速机构，圈状的所述转动连接件通过轴承安装在行星齿轮减速机构的安装盘上，所述拉紧轮设置内齿圈，与行星齿轮减速机构的太阳齿轮同轴的输出齿轮与内齿圈之间通过连接齿轮连接；
    所述止逆机构设置在行星齿轮减速机构之前；
    止逆机构连接齿轮通过单向轴承安装在棘轮的轴上，当拉紧机构进行拉紧工作时，所述止逆机构处于止逆配合状态，在对应拉紧轮拉紧转动方向上，所述单向轴承允许止逆机构连接齿轮相对于棘轮转动，当拉紧轮驱动电机停止转动时，在反方向禁止止逆机构连接齿轮相对于棘轮转动而必须两者一起转动。
  11. 如权利要求1所述的拉紧机构，其特征在于设置有压带机构，所述压带机构设置在手提打包机的摇臂上，所述压带机构包括第一弹性机构和压带部件，所述第一弹性机构将所述压带部件向下顶，并允许所述压带部件回缩及为所述压带部件提供向下复位弹力，所述压带部件下端的高度低于摇臂内侧底部设置的齿板靠近压带机构这一侧的上端。
  12. 如权利要求11所述的拉紧机构，其特征在于所述压带部件采用滚动体。
  13. 如权利要求11所述的拉紧机构，其特征在于所述手提打包机在摇臂的内侧设置打包带限位结构。
  14. 如权利要求11、12或13所述的拉紧机构，其特征在于所述压带机构设置能够可转动的安装块，所述第一弹性机构和压带部件设置在所述安装块中，通过所述安装块的转动来使得所述压带部件在让位高度上适应在拉紧带时的打包带上抬，所述安装块连接第二弹性机构。
  15. 如权利要求14所述的拉紧机构，其特征在于所述压带机构设置隔套、连接螺丝，所述隔套和安装块连接，所述连接螺丝将所述安装块与所述摇臂连接。
  16. 如权利要求14所述的拉紧机构，其特征在于所述第一弹性机构采用压簧，所述安装块内部设置安装孔，所述压带部件采用钢珠，所述压簧和钢珠设置在安装孔内，所述安装孔的下端孔口小于钢珠的直径。
  17. 如权利要求15所述的拉紧机构，其特征在于所述第二弹性机构采用扭簧，所述扭簧套在所述隔套之间并连接在摇臂和安装块之间。
  18. 如权利要求15所述的拉紧机构，其特征在于所述安装块设置连接孔，所述隔套设置插入到连接孔中的部分，所述连接螺丝穿过连接孔和隔套而与摇臂 连接；所述安装块设置有正交穿过所述连接孔的孔，处于连接孔下部的作为安装孔，所述压带部件采用钢珠，所述压簧和钢珠设置在安装孔内，所述安装孔的下端孔口小于钢珠的直径，所述隔套的插入部分作为所述压簧的支撑部件。
  19. 如权利要求15所述的拉紧机构，，其特征在于所述隔套设置插入到连接孔中的部分并作为所述安装块的转动轴。
  20. 如权利要求14所述的拉紧机构，，其特征在于所述摇臂的外侧设置有凹区，所述安装块对应在所述凹区中设置。
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