Tension mechanism

Abstract

The present invention provides a tensioning mechanism installed in a portable baler, which is provided with a rotation direction control and rotation angle holding mechanism, a backlash prevention mechanism, and a rocker arm, wherein the rotation direction control and rotation angle holding mechanism are connected with the backlash prevention mechanism and the rocker arm; and the rocker arm is provided with a tooth structure matched with a tensioning wheel. The present invention has a compact structure and can realize a handleless operation of the portable baler from a tensioning state to a non-tensioning state without operating a handle.

Description

Technical Field

[0001] The invention relates to a tensioning mechanism, in particular to a tensioning mechanism of a portable baler. Background Art

[0002] A portable baler is a portable device that is conveniently carried to relevant work sites to strap items. The tensioning mechanism is used to tighten the strapping belt after it is wrapped around the item, and its actuator uses a tensioning wheel. In the past, portable balers used a handle structure, and the portable baler was operated by operating the handle to change from a tightened state to a non-tensioned state (as a working state for releasing or removing the strapping belt), and the operation was not automated enough. Summary of the invention

[0003] The purpose of the present invention is to provide a tensioning mechanism suitable for installation in a portable baler, so as to realize the handleless operation of the portable baler from a tensioned state to a non-tensioned state. To this end, the present invention adopts the following technical solutions:

[0004] The tensioning mechanism is installed in a portable baler, and the portable baler is provided with a tensioning wheel and a tensioning wheel driving motor; it is characterized in that a gear connecting mechanism is arranged between the driving motor and the tensioning wheel, and the tensioning mechanism is also provided with a rotation direction control and rotation angle holding mechanism, a non-return mechanism, and a rocker arm, and the rotation direction control and rotation angle holding mechanism are connected with the non-return mechanism and the rocker arm; a tooth structure cooperating with the tensioning wheel is arranged on the rocker arm, and the rocker arm is driven to rotate and maintain the angle of the rocker arm after it is rotated into place through the cooperation of the rotation direction control and rotation angle holding mechanism and the second reset mechanism, so that the tooth structure and the tensioning wheel are in a tensioned matching state or a loosened state; through the cooperation of the rotation direction control and rotation angle holding mechanism and the first reset mechanism, the non-return mechanism is driven to be in a non-return matching state or to disengage the non-return matching state, and the gear connecting mechanism is connected with the non-return mechanism, and when the non-return mechanism is in the non-return matching state, the tensioning wheel can only be driven to rotate in one direction but cannot be reversed, and the one-way direction is the rotation direction that tightens the strapping belt.

[0005] The rotation direction control and rotation angle holding mechanism adopts a steering gear.

[0006] Furthermore, the anti-return mechanism includes a anti-return mechanism connecting gear, a ratchet coaxially connected to the anti-return mechanism connecting gear, and a pawl cooperating with the ratchet; the pawl can be driven by the first connecting gear through the cooperation of the first connecting structure and the first connecting gear; the rocker arm can be driven by the second connecting gear through the cooperation of the second connecting structure and the second connecting gear; the rotation direction control and rotation angle maintaining mechanism drives the first connecting gear and the second connecting gear.

[0007] Furthermore, the first connecting gear and the second connecting gear are meshed and connected to rotate synchronously, and the second connecting gear is larger than the first connecting gear but has a lower rotation speed than the first connecting gear.

[0008] Furthermore, the second connection mechanism includes a driving member driven by the second connection gear and a rotating connection member, the rotating connection member is provided with an acted portion cooperating with the active member, the rotating connection member is further provided with a structure connected to the rocker arm, and the rotating connection member is further provided with a portion connected to the second reset mechanism.

[0009] Furthermore, the rotating connecting member is ring-shaped, and its rotation center line is colinear with the rotation center line of the tensioning wheel. A planetary gear reduction mechanism is provided in the gear connection structure, and the ring-shaped rotating connecting member is installed on the planetary gear reduction mechanism through a bearing.

[0010] Furthermore, the ratchet 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 active member and the shaft of the second connecting gear are fixedly connected or integrated.

[0011] Furthermore, 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 stage or multiple stages.

[0012] Further, a preferred embodiment is: the steering gear and the tension wheel driving motor are arranged in parallel, and the steering gear is located above the tension wheel and the tension wheel driving motor; the steering gear is connected to the first connecting gear through a driving gear, and the first connecting gear is meshed and connected with the second connecting gear, and the second connecting gear is larger than the first connecting gear and has a lower rotation speed than the first connecting gear;

[0013] The anti-return mechanism comprises an anti-return mechanism connecting gear, a ratchet coaxially connected to the anti-return mechanism connecting gear, and a pawl matched with the ratchet, the pawl is connected to the first connecting gear through a first connecting structure, and the rocker arm is connected to the second connecting gear through a second connecting structure;

[0014] The second connection mechanism includes a driving member driven by the second connection gear and a rotating connection member, wherein the rotating connection member is provided with an acted portion cooperating with the active member, and the rotating connection member is also provided with a structure connected with the rocker arm;

[0015] The rotating connecting member is in a ring shape, and its rotation center line is colinear with the rotation center line of the tension wheel. A planetary gear reduction mechanism is provided in the gear connection structure. The ring-shaped rotating connecting member is mounted on the mounting plate of the planetary gear reduction mechanism through a bearing. The tension wheel is provided with an inner gear ring, and the output gear coaxial with the sun gear of the planetary gear reduction mechanism is connected to the inner gear ring through a connecting gear.

[0016] The anti-return mechanism is arranged before the planetary gear reduction mechanism;

[0017] The connecting gear of the anti-return mechanism is installed on the shaft of the ratchet through a one-way bearing. When the tensioning mechanism is performing the tensioning work, the anti-return mechanism is in a anti-return matching state. In the tightening rotation direction of the corresponding tensioning wheel, the one-way bearing allows the connecting gear of the anti-return mechanism to rotate relative to the ratchet. When the tensioning wheel driving motor stops rotating, the connecting gear of the anti-return mechanism is prohibited from rotating relative to the ratchet in the opposite direction, and the two must rotate together.

[0018] Furthermore, the inner gear ring is coaxially arranged with the sun gear of the planetary gear reduction mechanism; the tension wheel and the planetary gear reduction mechanism are arranged close to each other in the axial direction, so as to further reduce the connecting parts and the volume of the machine, and facilitate the use of the portable baler.

[0019] Further, the first gear and the sun gear of the planetary gear reduction mechanism are coaxially connected together to further simplify the connection structure. As an alternative, the first gear and the sun gear can also be connected via an intermediate gear instead of being coaxial.

[0020] Furthermore, 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 to the output gear, the output gear is on the other side of the mounting plate, and the inner ring gear is on its periphery, and a plurality of connecting gears surrounding the output gear are arranged between the output gear and the inner ring gear, and the connecting gear shaft is fixed on the mounting plate.

[0021] Furthermore, the connecting gear and the output gear are in a speed reduction connection relationship.

[0022] Due to the adoption of the technical solution of the present invention, the present invention has a compact structure and is suitable for use in a portable baler. The portable baler can be operated from a tensioned state to a non-tensioned state without a handle. Furthermore, for the tensioning mechanism using a tension wheel dedicated drive motor, the worm gear structure is avoided, and a compact assembly relationship of adjacent and concentric inclusion can be achieved, the volume is reduced, and the planetary gear is suitable for use in the space limited and applicable to the portable baler and is equipped with a non-return mechanism. The volume is small and can be conveniently used by the user with low energy consumption.

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention.

[0025] Figure 2It is a three-dimensional schematic diagram from another angle of an embodiment of the present invention.

[0026] Figure 3 It is a front view of the embodiment of the present invention after the motor mounting base is hidden.

[0027] Figure 4 Exploded diagram of the anti-reverse mechanism and its surrounding structures.

[0028] Figure 5 Exploded diagram of the anti-reverse mechanism and planetary gear mechanism.

[0029] Figure 6 It is an exploded view of an embodiment of a portable baler to which the present invention is applied. DETAILED DESCRIPTION

[0030] Refer to the accompanying drawings. The present invention provides a tensioning mechanism, which is installed in a portable baler for application. The portable baler is provided with a tensioning wheel 100 and a tensioning wheel driving motor 200. The driving motor 200 is installed 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 driving motor 200 and the tensioning wheel 100, and the gear connection structure contains a planetary gear reduction mechanism and a connecting gear between the driving motor 200 and the planetary gear reduction mechanism.

[0031] The tensioning mechanism is also provided with a rotation direction control and rotation angle holding mechanism, a non-return mechanism, and a rocker arm 300 . The rotation direction control and rotation angle holding mechanism can adopt a steering gear 6 . The servo 6 is connected to 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 on the periphery of the tension wheel 100; a tooth structure 301 cooperating with the tension wheel 100 is provided on the rocker arm 300, and the rocker arm 300 is driven to rotate and maintain the angle of the rocker arm 300 after it is rotated into place through the cooperation of the servo 6 and the second reset mechanism, wherein the second reset mechanism adopts a compression spring 62 to make the tooth structure 301 and the tension wheel 100 in a tightened fit state or a loosened state; through the cooperation of the servo 6 and the first reset mechanism, the anti-return mechanism is driven to be in a anti-return fit state or to disengage the anti-return fit state, wherein the first reset mechanism adopts a compression spring 61, and the gear connection mechanism is connected to the anti-return mechanism, and when the anti-return mechanism is in the anti-return fit state, the tension wheel 100 can only be driven to rotate in one direction and cannot be reversed, and the one-way direction is the rotation direction that tightens the strapping belt.

[0032] The anti-return mechanism includes a anti-return mechanism connecting gear 21, a ratchet 22 coaxially connected to the anti-return mechanism connecting gear 21, and a pawl 23 cooperating with the ratchet. The pawl 23 can be driven by the first connecting gear through the cooperation of the first connecting structure and the first connecting gear 71, and the rocker arm 300 can be driven by the second connecting gear through the cooperation of the second connecting structure and the second connecting gear 72.

[0033] The servo motor 6 and the tension wheel driving motor 200 are arranged in parallel, and the servo motor 6 is located above the tension wheel 100 and the tension wheel driving motor 200; the servo motor 6 is connected to the first connecting gear 71 through the driving gear 73, and the first connecting gear 71 is meshed and connected 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 tension wheel. The pawl arm 230 is arranged on the shaft 720 of the second connecting gear 72 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. The second connecting gear 72 is larger than the first connecting gear 71 and has a smaller rotation speed than the first connecting gear 71, so that the center of gravity of the portable baler is more stable, the movement 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, which is also a reduction matching relationship.

[0034] The first connecting structure includes a first cam 711 on the first connecting gear shaft 710 and a second cam 231 arranged on the pawl arm 230. The first cam 711 and the second cam 231 cooperate with each other. The pawl arm 230 is connected to the reset spring 61. The positive rotation of the servo 6 drives the pawl to disengage from the ratchet wheel through the cooperation of the above-mentioned cams. The reset spring 61 is not only used to drive the pawl 23 to reset and form a meshing cooperation with the ratchet wheel 23, but also used to make the second cam 231 approach the first cam 711.

[0035] Both ends of the shaft 220 of the ratchet 22 are respectively mounted on the mounting plate 203 and the mounting seat 400 through bearings 25. The connecting gear 21 is mounted on the shaft of the ratchet 22 through a one-way bearing 27, and the direction of the one-way bearing 27 is: when the tensioning mechanism is in tensioning operation, the connecting gear 21 is allowed to rotate relative to the ratchet 22 driven by the first gear 1, and when the tensioning wheel driving motor 200 stops rotating, the connecting gear 21 is prohibited from rotating relative to the ratchet in the opposite direction, and the two must rotate together.

[0036] The second connection mechanism includes a driving member 721 driven by the second connection gear and a rotating connection member 8. The rotating connection member 8 is provided with an acted portion 81 matched with the driving member 721. The rotating connection member is also provided with a structure 82 connected to the rocker arm and a portion 83 connected to the second reset mechanism. The driving member 721 and the shaft 720 of the second connection gear 72 are fixedly connected or integrated. When the servo rotates forward, the driving member 721 acts on the acted portion 81, so that the rotating connection member 8 rotates. The rotation causes the rocker arm 300 to move in the loosening direction by an angle through the structure 82 connected to the rocker arm. The rocker arm 300 may be provided with a bayonet 302 matched with the structure 82. When the servo rotates reversely, the driving member 721 rotates in the reverse direction to give way. The rotating connection member 8 rotates in the reverse direction through the action of the compression spring 62. The rocker arm 300 moves in the tightening direction by an angle through the structure 82 connected to the rocker arm, so that the tooth structure 301 and the tensioning wheel 100 are in a tightening matching state.

[0037] The rotating connecting member 8 is in a ring shape, and its rotation center line is colinear with the rotation center line of the tension wheel 100. The ring-shaped rotating connecting member 8 is mounted on the mounting plate 500 of the planetary gear reduction mechanism through a bearing. Since the steering gear 6 is located obliquely above the tension wheel 100, and since the driving gear 73, the first connecting gear 71 and the second connecting gear 72 are parallel to the axis of the tension wheel, the shaft 720 of the second connecting gear 72 is arranged in parallel above the ring-shaped rotating connecting member 8, so that the driving member 721 is located above the ring-shaped rotating connecting member 8, and the driving member 721 utilizes the characteristic that its rotation diameter is smaller than the diameter of the ring-shaped rotating connecting member 8, so that the rocker arm can rotate at a smaller angle, thereby improving the working speed and the precision of the machine.

[0038] The tension wheel 100 is provided with an inner ring gear 101, and the output gear 4 coaxial with the sun gear 31 of the planetary gear reduction mechanism is connected to the inner ring gear 101 via a connecting gear 5; the inner ring gear 101 is concentrically arranged with the sun gear 31 of the planetary gear reduction mechanism, and their rotation centers are on the same axis; the tension wheel 100 and the planetary gear reduction mechanism are arranged close to each other front and back in the axial direction.

[0039] The non-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 drive motor 200. The driving gear 202 is meshed and connected with the first gear 1, and the relationship between them is a reduction connection relationship; the first gear 1 is located in front of the planetary gear reduction mechanism, the first gear 1 is connected to the planetary gear reduction mechanism, and the first gear 1 is also transmission connected to the non-return mechanism (meshed and connected with the connecting gear 21).

[0040] The shafts of the first gear 1 and the sun gear 31 of the planetary gear reduction mechanism are the same shaft or are an integral unit, and the shaft is mounted on the mounting seat 400 via a bearing 11 .

[0041] The present invention also provides an embodiment of a reduction mechanism with a simple structure and small size, wherein the planetary gear reduction mechanism comprises the sun gear 31, three planetary gears 32, a planetary gear carrier 33 and an inner gear ring 34, wherein the inner gear ring 34 is arranged on a mounting plate 500, and the mounting plate 500 is fixed on a mounting seat 400, wherein 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 holes on the mounting plate 500 and is 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, the rotating shaft 35 of the planetary gear carrier 33 of the planetary gear reduction mechanism is connected to the output gear 4, and the output gear 4 is located on the other side of the mounting plate 500, and the inner gear ring 101 is located on the periphery of the output gear 4, and there are a plurality of connecting gears 5 surrounding the output gear 4, and the shaft of the connecting gear 5 is fixed on the mounting plate 500, and the number of the connecting gears 5 is generally 3. The connecting gear 5 and the output gear 4 are also in a speed reduction connection relationship.

[0042] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the protection scope of the present invention.

Claims

1. A tensioning mechanism installed in a portable baler, wherein the portable baler is provided with a tensioning wheel and a tensioning wheel driving motor; characterized in that A gear connection mechanism is arranged between the driving motor and the tensioning wheel, and the tensioning mechanism is also provided with a rotation direction control and rotation angle holding mechanism, a non-return mechanism, and a rocker arm, wherein the rotation direction control and rotation angle holding mechanism are connected with the non-return mechanism and the rocker arm; a tooth structure cooperating with the tensioning wheel is arranged on the rocker arm, and the rotation direction control and rotation angle holding mechanism and the second reset mechanism are cooperated to drive the rocker arm to rotate and maintain the angle of the rocker arm after it is rotated into place, so that the tooth structure and the tensioning wheel are in a tightened fit state or a loosened state; the non-return mechanism is driven to be in a non-return fit state or to disengage the non-return fit state through the cooperation of the rotation direction control and rotation angle holding mechanism and the first reset mechanism, and the gear connection mechanism is connected with the non-return mechanism, and when the non-return mechanism is in the non-return fit state, the tensioning wheel can only be driven to rotate in one direction but cannot be reversed, and the one-way direction is the rotation direction that tightens the strapping belt.

2. The tensioning mechanism according to claim 1, characterized in that The rotation direction control and rotation angle holding mechanism adopts a steering gear.

3. The tensioning mechanism according to claim 1 or 2, characterized in that The anti-return mechanism includes a anti-return mechanism connecting gear, a ratchet coaxially connected to the anti-return mechanism connecting gear, and a pawl cooperating with the ratchet; the pawl can be driven by the first connecting gear through the cooperation of the first connecting structure and the first connecting gear; the rocker arm can be driven by the second connecting gear through the cooperation of the second connecting structure and the second connecting gear; the rotation direction control and rotation angle maintaining mechanism drives the first connecting gear and the second connecting gear.

4. The tensioning mechanism according to claim 3, characterized in that The first connecting gear and the second connecting gear are meshed and connected to rotate synchronously. The second connecting gear is larger than the first connecting gear but has a lower rotation speed than the first connecting gear.

5. The tensioning mechanism according to claim 3, characterized in that The first connecting structure includes a first cam on the first connecting gear shaft and a second cam arranged on the pawl arm. The first cam and the second cam cooperate with each other, and the pawl arm is connected to the first reset mechanism.

6. The tensioning mechanism according to claim 3, characterized in that The second connection structure includes a driving member driven by the second connection gear and a rotating connecting member. The rotating connecting member is provided with an acted portion cooperating with the driving member. The rotating connecting member is also provided with a structure connected to the rocker arm.

7. The tensioning mechanism according to claim 6, characterized in that The rotating connecting member is arranged at a position connected to the second reset mechanism.

8. The tensioning mechanism according to claim 6, characterized in that The rotating connecting member is in a ring shape, and its rotation center line is colinear with the rotation center line of the tension wheel. A planetary gear reduction mechanism is provided in the gear connection structure, and the ring-shaped rotating connecting member is installed on the planetary gear reduction mechanism through a bearing.

9. The tensioning mechanism according to claim 6, characterized in that The first connecting structure includes a first cam on the first connecting gear shaft and a second cam arranged on the pawl arm, the first cam and the second cam cooperate with each other, and the pawl arm is connected to the first reset mechanism; the pawl arm is installed 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.

10. The tensioning mechanism according to claim 2, characterized in that The steering gear and the tension wheel driving motor are arranged in parallel, and the steering gear is located above the tension wheel and the tension wheel driving motor; the steering gear is connected to the first connecting gear through a driving gear, and the first connecting gear is meshed and connected with the second connecting gear, and the second connecting gear is larger than the first connecting gear and has a lower rotation speed than the first connecting gear; The anti-return mechanism comprises an anti-return mechanism connecting gear, a ratchet coaxially connected to the anti-return mechanism connecting gear, and a pawl matched with the ratchet, the pawl is connected to the first connecting gear through a first connecting structure, and the rocker arm is connected to the second connecting gear through a second connecting structure; The second connection structure includes a driving member driven by the second connection gear and a rotating connection member, wherein the rotating connection member is provided with an acted portion cooperating with the driving member, and the rotating connection member is also provided with a structure connected with the rocker arm; The rotating connecting member is in a ring shape, and its rotation center line is colinear with the rotation center line of the tension wheel. A planetary gear reduction mechanism is provided in the gear connection structure. The ring-shaped rotating connecting member is mounted on the mounting plate of the planetary gear reduction mechanism through a bearing. The tension wheel is provided with an inner gear ring, and the output gear coaxial with the sun gear of the planetary gear reduction mechanism is connected to the inner gear ring through a connecting gear. The anti-return mechanism is arranged before the planetary gear reduction mechanism; The connecting gear of the anti-return mechanism is installed on the shaft of the ratchet through a one-way bearing. When the tensioning mechanism is performing the tensioning work, the anti-return mechanism is in a anti-return matching state. In the tightening rotation direction of the corresponding tensioning wheel, the one-way bearing allows the connecting gear of the anti-return mechanism to rotate relative to the ratchet. When the tensioning wheel driving motor stops rotating, the connecting gear of the anti-return mechanism is prohibited from rotating relative to the ratchet in the opposite direction, and the two must rotate together.

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