CN105114553B - The work of spring swinging rod control enters quick return motion mechanism - Google Patents

Abstract

The invention relates to a working forward and fast rewinding mechanism controlled by a spring swing bar, comprising: a driving mechanism connected by a fork lever and a toggle mechanism, the driving mechanism includes a driving gear that can mesh with a first gear and a second gear respectively, and the driving The gears are slidably arranged on the drive shaft, and the rotation directions of the first gear and the second gear are opposite; the toggle mechanism includes a sliding lever, on which two shift fork levers are arranged; one end of the drive shaft is provided with a screw, which is connected to the screw of the bent bar. The sleeve thread is sleeved on the screw rod; the first rotating shaft, the second rotating shaft and the third rotating shaft are arranged on the swing rod in sequence, the swing rod is connected to the shift rod through the first rotating shaft, the swing rod is connected to the chain rod through the second rotating shaft, and the swing rod is connected through the third rotating shaft. The rotating shaft rotates; the two ends of the chain are respectively connected to the free end of the chain rod and the free end of the curved rod, and the free end of the chain rod and the free end of the curved rod can be pushed together; one end of the spring is fixedly connected to the swing rod at the second rotating shaft The other end of the spring is fixedly connected to the fixed block.

Description

Work forward and fast reverse mechanism controlled by spring swing rod

technical field

The invention relates to a transmission conversion mechanism, in particular to a work-forward and fast-reverse mechanism controlled by a spring swing bar.

Background technique

The transmission conversion mode of modern power mechanism is mostly carried out by means of frequency converter to control the motor. The frequency converter controls the speed of the motor and controls the steering of the motor, which makes the speed output of the motor to the transmission mechanism extremely flexible. However, the common frequency converter has insufficient voltage compensation for the motor when outputting low frequency, and the torque boost of the motor is not enough, resulting in a decrease in the output torque of the motor and unstable load capacity. Especially in the process of frequent start, stop, and reverse at low speeds, ordinary frequency converters do have shortcomings, and the mechanical transmission mechanism needs to be redesigned to achieve a more ideal transmission.

Contents of the invention

The invention overcomes the disadvantages of the prior art, and provides a spring swing rod-driven, chain-assisted spring swing rod-controlled work-forward and fast-rewind mechanism.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a work-forward and fast-reverse mechanism controlled by a spring swing bar, including: a drive mechanism and a toggle mechanism connected by a fork lever, and it is characterized in that,

- the drive mechanism includes drive gears capable of meshing with the first gear and the second gear respectively, the drive gears are slidably arranged on the drive shaft, and the rotation directions of the first gear and the second gear are opposite;

- the toggling mechanism includes a slidably set lever, on which two fork levers are arranged, and the two fork levers are respectively located outside the two ends of the drive gear;

One end of the drive shaft is provided with a screw rod, and the screw sleeve connecting the bent rod is threaded on the screw rod;

The first rotating shaft, the second rotating shaft and the third rotating shaft are arranged in turn on the swing rod, the swing rod is connected to the lever through the first rotating shaft, the swing rod is connected to the chain rod through the second rotating shaft, and the swing rod is rotated through the third rotating shaft; the two ends of the chain are respectively connected The free end of the chain rod and the free end of the curved rod, the free end of the chain rod and the free end of the curved rod can be pushed together; one end of the spring is fixedly connected to the swing rod at the second rotating shaft, The other end of the spring is fixedly connected to the fixed block.

In a preferred embodiment of the present invention,

- when the drive gear meshes with the first gear, the swing bar is biased toward the first gear, and the spring is located on one side of the swing bar's bias direction;

- When the driving gear meshes with the second gear, the swing link is biased toward the second gear, and the spring is located on one side of the swing direction.

In a preferred embodiment of the present invention, the spring is in a stretched state.

In a preferred embodiment of the present invention,

- when the driving gear meshes with the first gear, the screw drives the screw sleeve away from the driving gear, and the chain is in a tight state;

- When the driving gear meshes with the second gear, the screw drives the screw sleeve close to the driving gear, the chain is in a relaxed state, and the free end of the chain rod and the free end of the curved rod are pushed together .

In a preferred embodiment of the present invention, the distance between the two shift fork rods is greater than the axial length of the driving gear.

In a preferred embodiment of the present invention, a stopper is provided on both sides of the free end of the swing rod.

In a preferred embodiment of the present invention, the two ends of the driving rod are respectively slidably socketed on the respective sleeve blocks.

In a preferred embodiment of the present invention, the driving gear sliding key is arranged on the driving shaft, and the moving distance of the driving gear on the sliding key of the driving shaft is the axis of the first gear and the second gear to the distance.

In a preferred embodiment of the present invention, the first gear is coaxially connected with a transmission gear, and the transmission gear meshes with the second gear.

The present invention solves the defect existing in the background technology, and the present invention has the following beneficial effects:

(1) Through the action of the toggle mechanism, the position of the driving gear can be changed between the first gear and the second gear, which plays the role of changing the meshing object of the driving gear. At the same time, because the first gear and the second gear rotate in opposite directions, Ensure that the drive shaft changes direction of rotation each time the drive gear changes meshing objects.

(2) The rotation direction of the drive shaft and the toggle direction of the toggle mechanism just form a linkage structure. When the drive gear meshes with the first gear, the toggle mechanism is driven by the drive shaft so that the toggle mechanism has the ability to turn the drive gear to the second gear. The tendency and power of the gear, and finally the driving gear is separated from the first gear, and driven by the elastic potential energy of the spring on the swing rod to mesh with the second gear; otherwise, when the driving gear meshes with the second gear, the toggle mechanism will reverse the driving gear sports.

(3) On the one hand, the structure of the feather key can ensure that there is a clamp limit between the drive gear and the drive shaft along the circumference of the drive shaft, so that the drive gear will not move relative to the drive shaft along the circumference; on the other hand, the drive gear can Sliding along the axial direction of the drive shaft ensures that the drive gear moves between the first gear and the second gear.

(4) The two fork levers are respectively located on both sides of the drive gear, and the drive gear can move axially along the drive shaft under the drive of the lever.

(5) The set block can limit the movement posture of the lever, and the stopper can limit the swing lever driven by the spring within a certain swing range, and then the movement range of the lever is also limited to ensure that the lever will not be excessively left and right Shift, only ensure that the drive gear changes the meshing distance between the first gear and the second gear.

(6) When the driving gear meshes with the first gear, the pendulum shifts toward the side of the first gear. At this time, the spring tightens the pendulum, and the screw sleeve is driven away from the first gear by the screw, and then the chain is tightened, thereby pulling the pendulum. The lever rotates towards the second gear side, and when the swing lever crosses the vertical state, the driving gear is disengaged from the first gear, and the tension of the spring will pull the swing lever towards the second gear side, and move the swing lever toward the second gear. The direction of the second gear swings, and finally the driving gear is pressed and meshed with the second gear.

(7) During the left and right movement of the fork lever, the two fork levers continuously push the drive gear to move left and right along the drive shaft to change the meshing objects.

(8) The first rotating shaft, the second rotating shaft and the third rotating shaft cooperate with each other, so that the pendulum can rotate with the third rotating shaft as the center of a circle, drive the shift lever to move left and right, and then drive the fork lever to follow the shift lever to move left and right.

(9) The structure of the chain can ensure that when the screw sleeve is far away from the first gear, the chain is tightened, and the chain increases the total length of the chain rod and the bent rod; when the screw sleeve is close to the first gear, the chain is loose, and the end of the bent rod and the chain rod The ends are topped together, and the total length does not include the length of the chain at this time.

(10) Through the set soft connection, it is ensured that during the reciprocating movement of the screw sleeve, when the swing rod is pushed, the distance between the screw sleeve and the swing rod will change due to the change of the chain, so that for the auxiliary lever Push the position change of the driving gear and the meshing object transformation.

(11) The setting of the stopper ensures that the lower end of the swing rod will not deviate beyond the range, that is, the swing rod will not make the moving range of the lever too large.

(12) The structure of the screw driving the screw sleeve, and then the screw sleeve provides the power source for the toggle mechanism. Since the rotation direction of the screw is related to the meshing object of the drive gear, the movement direction of the screw sleeve is related to the rotation direction of the drive shaft, and The direction of rotation of the drive shaft is controlled by the toggle mechanism; thus, the above-mentioned process forms a cyclic motion process that influences each other, and the toggle mechanism and the drive mechanism continuously affect the continuous cycle control.

(13) The distance between the two shift fork rods is greater than the axial length of the drive gear, which can provide inertial buffering for the reverse movement of the drive gear.

(14) The distance between the two shift fork rods is greater than the axial length of the drive gear, and the length longer than the gear is the margin of the distance between the two shift fork rods relative to the length of the drive gear. Due to the existence of the above margin, the swing rod is in the When in the vertical state, the two shift fork rods will not be blocked by the drive gear, and the swing rod only needs to rely on inertia when it crosses its vertical state.

(15) The transmission gear is coaxial with the first gear, and the second gear meshes with the transmission gear to realize the reverse rotation of the first gear and the second gear.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a three-dimensional structure diagram one of a preferred embodiment of the present invention;

Fig. 2 is a three-dimensional structure diagram two of a preferred embodiment of the present invention;

In the figure: 1, the first gear, 2, the second gear, 3, the driving gear, 4, the driving shaft, 5, the feather key, 6, the transmission gear, 7, the driving lever, 8, the fork lever, 9, the cover block , 10, screw rod, 11, screw sleeve, 12, bent rod, 13, chain, 14, chain rod, 16, first rotating shaft, 17, second rotating shaft, 18, third rotating shaft, 19, spring, 20, block , 21, fixed block.

detailed description

The present invention will now be further described in detail in conjunction with the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so it only shows the composition related to the present invention.

As shown in Fig. 1 and Fig. 2, a work-forward and fast-reverse mechanism controlled by a spring swing bar includes: a driving mechanism and a toggle mechanism connected by a fork lever 8,

The drive mechanism includes a drive gear 3 that can mesh with the first gear 1 and the second gear 2 respectively, the drive gear 3 is slidably arranged on the drive shaft 4, and the rotation direction of the first gear 1 and the second gear 2 is opposite; the toggle mechanism includes a slide The shift lever 7 provided, two shift fork levers 8 are arranged on the shift lever 7, and the two shift fork levers 8 are respectively located at the outer sides of the two ends of the driving gear 3; Driven by the driving rod 7, it moves axially along the drive shaft 4.

One end of the drive shaft 4 is provided with a screw rod 10, and the screw sleeve 11 connected to the bent rod 12 is threaded on the screw rod 10; the screw rod 10 drives the structure of the screw sleeve 11, and then the screw sleeve 11 provides a power source for the toggle mechanism. The direction of rotation is related to the meshing object of the drive gear 3, so the direction of motion of the screw sleeve 11 is related to the direction of rotation of the drive shaft 4, and the direction of rotation of the drive shaft 4 is controlled by the toggle mechanism; During the cycle movement process, the toggle mechanism and the drive mechanism continuously affect the continuous cycle control.

The first rotating shaft 16, the second rotating shaft 17 and the third rotating shaft 18 are successively arranged on the swing rod, the swing rod is connected to the shift rod 7 through the first rotating shaft 16, the swing rod is connected to the chain rod 14 through the second rotating shaft 17, and the swing rod is passed through the third rotating shaft 18 rotation; chain 13 two ends connect the free end of chain bar 14 and the free end of bent bar 12 respectively, the free end of chain bar 14 and the free end of bent bar 12 can push together; One end of spring 19 is fixedly connected on the second On the swing lever at the second rotating shaft 17, the other end of the spring 19 is fixedly connected to the fixed block 21. The first rotating shaft 16, the second rotating shaft 17 and the third rotating shaft 18 cooperate with each other, so that the fork can rotate with the third rotating shaft 18 as the center of circle, drive the driving rod 7 to move left and right, and then drive the shift fork rod 8 to follow the shift rod 7 to move left and right.

Through the action of the toggle mechanism, the position of the driving gear 3 can be changed between the first gear 1 and the second gear 2, which plays the role of changing the meshing object of the driving gear 3. At the same time, due to the rotation of the first gear 1 and the second gear 2 The direction is opposite to ensure that the drive shaft 4 changes the direction of rotation each time the drive gear 3 changes the meshing object.

The rotation direction of the drive shaft 4 and the toggle direction of the toggle mechanism just form a linkage structure. When the drive gear 3 meshes with the first gear 1, the toggle mechanism is driven by the drive shaft 4 so that the toggle mechanism has the ability to turn the drive gear 3 to The inclination and power of the second gear 2, and finally the driving gear 3 breaks away from the first gear 1, and is driven by the elastic potential energy of the spring 19 on the fork to mesh with the second gear 2; otherwise, when the driving gear 3 meshes with the second gear 2, The toggle mechanism will cause the drive gear 3 to move in reverse.

During the left and right movement of the shift lever 7, the shift fork lever 8 continuously pushes the drive gear 3 to move left and right along the drive shaft 4 through the two shift fork levers 8 to change the meshing object.

The structure of the chain 13 can ensure that when the screw sleeve 11 is away from the first gear 1, the chain 13 is tightened, and the chain 13 increases the total length of the chain bar 14 and the bent bar 12; when the screw sleeve 11 is close to the first gear 1, the chain 13 is loose, The ends of the bent bar 12 and the chain bar 14 are butted together, and the total length does not include the length of the chain 13 at this time.

Through the soft connection provided, it is ensured that during the reciprocating movement of the screw sleeve 11, when the swing rod is pushed, the distance between the screw sleeve 11 and the swing rod will change due to the change of the chain 13, so that for the auxiliary dial The rod 7 promotes the position change of the driving gear 3 and the transformation of the meshing object.

- When the driving gear 3 meshes with the first gear 1, the swing bar is biased towards the first gear 1, and the spring 19 is located on the side of the swing bar's offset direction;

- When the driving gear 3 meshes with the second gear 2, the swing bar is biased toward the second gear 2, and the spring 19 is located on one side of the swing bar's offset direction.

The spring 19 is in tension.

When the driving gear 3 meshes with the first gear 1, the screw 10 drives the nut 11 away from the driving gear 3, and the chain 13 is in a tight state; when the driving gear 3 meshes with the second gear 2, the screw 10 drives the nut 11 to approach the driving gear 3 , the chain 13 is in a relaxed state, and the free end of the chain bar 14 and the free end of the bent bar 12 are abutted against each other. When the driving gear 3 meshes with the first gear 1, the swing bar is shifted towards the first gear 1 side, at this time, the spring 19 tightens the swing bar, the screw sleeve 11 is driven away from the first gear 1 by the screw rod 10, and then the chain 13 is stretched Tighten it, and then pull the swing lever to rotate towards the second gear 2. When the swing lever crosses the vertical state, the drive gear 3 is separated from the first gear 1. At this time, the tension of the spring 19 will move the swing lever towards the second gear 2. One side is pulled, and the pendulum swings toward the direction of the second gear 2, and finally the driving gear 3 is pressed to mesh with the second gear 2.

The distance between the two shift fork rods 8 is greater than the axial length of the drive gear 3 , which can provide inertial buffering for the reverse movement of the drive gear 3 . The distance between the two shift fork rods 8 is greater than the axial length of the drive gear 3, and the length longer than the drive gear 3 is the margin of the distance between the two shift fork rods 8 relative to the length of the drive gear 3. Due to the existence of the above margin, the pendulum When the bar is in the vertical state, the two fork levers 8 will not be blocked by the drive gear 3, and the fork only needs to rely on inertia when it crosses its vertical state.

Both sides of the swing rod free end are respectively provided with a stopper 20, and the setting of the stopper 20 ensures that the lower end of the swing rod will not deviate from beyond the range, that is, the swing rod will not cause the shifting rod 7 to move too much.

The two ends of the driving rod 7 are respectively slidably socketed on the respective corresponding sleeves 9, the sleeves 9 can limit the movement posture of the driving rod 7, and the stopper 20 can limit the swing rod driven by the spring 19 within a certain swing range. Furthermore, the range of movement of the driving rod 7 is also limited to ensure that the driving rod 7 will not deviate excessively from left to right, and only ensure that the driving gear 3 can change the meshing distance between the first gear 1 and the second gear 2 .

The sliding key 5 of the driving gear 3 is arranged on the driving shaft 4 , and the moving distance of the driving gear 3 on the sliding key 5 of the driving shaft 4 is the axial distance between the first gear 1 and the second gear 2 . On the one hand, the structure of the feather key 5 can ensure that there is a clamp limit between the drive gear 3 and the drive shaft 4 along the circumference of the drive shaft 4, so that the drive gear 3 will not move relative to the drive shaft 4 along the circumference; The driving gear 3 can slide along the axial direction of the driving shaft 4 to ensure that the driving gear 3 moves between the first gear 1 and the second gear 2 .

The first gear 1 is coaxially connected to the transmission gear 6, the transmission gear 6 meshes with the second gear 2, the transmission gear 6 is coaxial with the first gear 1, and the second gear 2 meshes with the transmission gear 6, realizing the first gear 1 and the second gear The reverse rotation of the second gear 2.

The driving rod 7 can only move along the axial direction of the driving rod 7 itself under the restriction of the cover block 9, but the driving rod 7 cannot rotate along the axial direction of the driving rod itself in the cover block 9, so that the movement on the driving rod 7 is ensured. The shift fork lever 8 can not turn to, and it has also ensured that the shift fork lever 8 can be moved to the drive gear 3 on its motion track.

The above is inspired by the ideal embodiment of the present invention. Through the above description, relevant personnel can make various changes and modifications within the scope of not departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims (7)

1. A work-forward and fast-rewind mechanism controlled by a spring fork, comprising: a drive mechanism and a toggle mechanism connected by a fork lever, characterized in that, - the drive mechanism includes drive gears capable of meshing with the first gear and the second gear respectively, the drive gears are slidably arranged on the drive shaft, and the rotation directions of the first gear and the second gear are opposite; - the toggling mechanism includes a slidably set lever, on which two fork levers are arranged, and the two fork levers are respectively located outside the two ends of the driving gear; One end of the drive shaft is provided with a screw rod, and the screw sleeve connecting the bent rod is threaded on the screw rod; The first rotating shaft, the second rotating shaft and the third rotating shaft are arranged in turn on the swing rod, the swing rod is connected to the lever through the first rotating shaft, the swing rod is connected to the chain rod through the second rotating shaft, and the swing rod is rotated through the third rotating shaft; the two ends of the chain are respectively connected The free end of the chain rod and the free end of the curved rod, the free end of the chain rod and the free end of the curved rod can be pushed together; one end of the spring is fixedly connected to the swing rod at the second rotating shaft, The other end of the spring is fixedly connected to the fixed block; The distance between the two shift fork rods is greater than the axial length of the drive gear; A block is respectively arranged on both sides of the free end of the swing rod. 2. The work-forward and fast-rewind mechanism controlled by a spring swing rod according to claim 1, characterized in that: - when the drive gear meshes with the first gear, the swing bar is biased toward the first gear, and the spring is located on one side of the swing bar's bias direction; - When the driving gear meshes with the second gear, the swing link is biased toward the second gear, and the spring is located on one side of the swing direction. 3. The work-forward and fast-reverse mechanism controlled by a spring swing rod according to claim 2, wherein the spring is in a stretched state. 4. The work-forward and fast-rewind mechanism controlled by a spring swing rod according to claim 1, characterized in that: - when the driving gear meshes with the first gear, the screw drives the screw sleeve away from the driving gear, and the chain is in a tight state; - When the driving gear meshes with the second gear, the screw drives the screw sleeve close to the driving gear, the chain is in a relaxed state, and the free end of the chain rod and the free end of the curved rod are pushed together . 5 . The work-forward and fast-reverse mechanism controlled by a spring swing rod according to claim 1 , characterized in that: the two ends of the driving rod are respectively slidably socketed on the corresponding sets. 6 . 6. The work-forward and fast-reverse mechanism controlled by a spring swing rod according to claim 1, characterized in that: the drive gear feather key is arranged on the drive shaft, and the drive gear moves on the drive shaft feather key The distance is the axial distance between the first gear and the second gear. 7. The working forward and fast rewind mechanism controlled by a spring pendulum according to claim 6, wherein the first gear is coaxially connected with a transmission gear, and the transmission gear meshes with the second gear.