CN205013601U - Worker advances quick return motion mechanism - Google Patents

Abstract

The utility model relates to a work-forward and fast-rewind mechanism, which comprises: a driving mechanism connected by a fork lever and a toggle mechanism, the driving mechanism includes a driving gear that can be meshed with a first gear and a second gear respectively, and the driving gear is slidably arranged on On the driving shaft, the rotation direction of the first gear and the second gear is opposite; Connect a soft rope, one end of the two soft ropes is wound and connected to a reel, the other ends of the two soft ropes are respectively connected to the stop mechanism, the gear lever provided on the driving lever is connected to the stopping mechanism, and the driving lever is sleeved with a spring . 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, it is guaranteed After the drive gear changes the meshing object, the drive shaft changes the direction of rotation.

Description

A work-forward and fast-rewind mechanism

technical field

The utility model relates to a transmission conversion mechanism, in particular to a transmission mechanism for converting gear meshing objects.

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 utility model overcomes the deficiencies of the prior art, and provides a work-forward and fast-reverse mechanism assisted by spring elastic force and constrained by soft rope winding.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a work-forward and fast-reverse mechanism, including: a drive mechanism and a toggle mechanism connected by a shift 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 sliding lever, on which two fork levers are arranged. A flexible rope, one end of the two flexible ropes is respectively wound and connected to a reel on the drive shaft, the other end of the two flexible ropes is respectively connected to a stop mechanism, and the gear lever provided on the driving lever The stop mechanism can be connected, a spring is sheathed on the driving rod, and the soft rope passes through the outer end of the spring.

In a preferred embodiment of the present invention, the two ends of the driving rod are respectively slidably socketed on the corresponding sleeves.

In a preferred embodiment of the present invention, the sets of blocks are located outside the two shift fork rods, and springs are set on the blocks between the sets of blocks that are close to each other and the shift fork rods, and the two ends of the springs are respectively fixedly connected. The set of blocks and the fork rod.

In a preferred embodiment of the present invention, the stop mechanism includes a stop rod with a wedge-shaped head at one end and a fixed plate, the wedge-shaped head of the stop rod protrudes outside one surface of the fixed plate, and the stop rod also One end of the spring protrudes outside the other surface of the fixing plate, and the two ends of the spring are respectively fixed on the fixing plate and the stop rod.

In a preferred embodiment of the present invention, the wedge-shaped head includes a wedge-shaped surface and a right-angled surface, and the right-angled surface is parallel to the axis of the gear lever.

In a preferred embodiment of the utility model, the soft rope between the collar and the stop mechanism is also sleeved on a direction guide ring.

In a preferred embodiment of the utility model, the two soft ropes are intersected between the two stop structures and the two guide rings.

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 distance between the first gear and the second gear axial 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.

In a preferred embodiment of the present invention, a pulling ring is provided on one side of the driving lever, and the ring on the side corresponding to the position of the pulling ring is a double-ring structure including a first ring and a second ring. , the soft rope passes through the first ring, the pulling ring and the second ring in sequence.

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.

The utility model solves the defects in the background technology, and the utility model 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 lever 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 shift lever. At the same time, the set block and the shift fork lever can limit the spring on the shift lever between them. The two ends of the spring are fixedly connected to the set block and the shift fork rod respectively. It is ensured that the lever does not deviate excessively left and right, and it is only necessary to ensure that the distance between the driving gear and the first gear and the second gear is changed and meshed.

(6) When the drive gear meshes with the first gear, the stop mechanism restricts the gear lever, the spring on the lever close to the first gear is compressed, and the spring close to the second gear is stretched, so that the two springs form the drive lever The elastic potential energy moving towards the second gear only needs the soft rope to pull the stop lever to activate the gear lever to break away from the right-angled surface, so that the lever can quickly move towards the side of the second gear, and the gear lever is bound by the stop mechanism on the other side; Then when the second gear is driven to rotate in the opposite direction, the mechanism on the other side of the symmetry repeats the above-mentioned movement in reverse, and the cycle continues.

(7) The wedge-shaped surfaces of the two stop mechanisms are set opposite to each other, so that when the gear lever moves toward the wedge-shaped surface at a relatively high speed, the gear lever can easily pass over the wedge-shaped surface and be blocked by the right-angled surface; when crossing the wedge-shaped surface, the gear lever will press the stop lever axially towards the stop lever so that the stop lever does not completely block the shift lever.

(8) The spring on the stop mechanism can reset the displaced stop rod in time.

(9) The crossed flexible ropes can ensure that the reel close to the first gear is linked with the stop mechanism close to the second gear, or the reel close to the second gear is linked with the stop mechanism close to the first gear.

(10) When the driving gear meshes with the first gear, the reel close to the second gear will tighten its corresponding soft rope, and when the soft rope is stretched to a certain degree, the soft rope will pull the stop lever, The shift lever is freed from the constraints of the right-angled surface of the wedge-shaped head. At this time, the spring set on the shift lever will drive the shift fork lever of the shift lever, and the shift fork lever will push the driving gear to the direction of the second gear, and finally make the driving gear and the second gear. The gears engage, causing the drive shaft to reverse direction; conversely, the drive gear is pushed into the first gear direction and engages.

(11) When one reel is winding the soft rope, the other reel unwinds the soft rope and keeps in sync all the time to ensure that when the soft rope on one side is tightened and stretched, the other soft rope is unwound. The movement of the lever provides a margin, and the displacement of the lever will not be restricted by the soft rope.

(12) The guide ring provided can keep the two soft ropes from being wound randomly, and the same soft rope will not be too loose at the same time.

(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 transmission gear is coaxial with the first gear, and the second gear meshes with the transmission gear, realizing the reverse rotation of the first gear and the second gear.

(15) The soft rope is worn on the outer end of the spring on the driving lever on the corresponding side, so that when the spring is stretched, the corresponding auxiliary reel pulls the soft rope and pulls the stop bar.

(16) The soft rope is guided by the pull ring, the first ring and the second ring to form a part of the soft rope that is perpendicular to the shift lever, so that the shift lever can be relatively fixed without rotation, thereby ensuring the shift fork The lever does not rotate about the lever so that the fork lever does not deviate from the end which would disengage the drive gear.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

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

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

Fig. 3 is a positional relationship diagram between the pulling ring and the collar and the soft rope of the preferred embodiment of the present invention;

In the figure: 1. First gear, 2. Second gear, 3. Driving gear, 4. Driving shaft, 5. Feather key, 6. Transmission gear, 7. Driving lever, 8. Fork lever, 9. Collar , 10, the first ring, 11, the second ring, 12, the pulling ring, 13, the gear lever, 14, the soft rope, 15, the reel, 16, the guide ring, 17, the block, 18, the stop mechanism, 19 , stop bar, 20, fixed plate, 21, wedge-shaped head, 22, wedge-shaped surface, 23, rectangular surface, 24, spring.

detailed description

The utility model is described in further detail now in conjunction with accompanying drawing and embodiment, and these accompanying drawings all are simplified schematic diagrams, only illustrate the basic structure of the utility model in schematic mode, so it only shows the formation relevant to the utility model.

As shown in Figure 1, Figure 2, and Figure 3, a work-forward and fast-reverse mechanism includes: a driving mechanism and a toggle mechanism connected by a fork lever 8,

- The driving mechanism includes a driving gear 3 capable of meshing with the first gear 1 and the second gear 2 respectively, the driving gear 3 is slidably arranged on the driving shaft 4, and the first gear 1 and the second gear 2 rotate in opposite directions;

-The toggling mechanism includes a sliding lever 7, and two fork levers 8 are arranged on the lever 7, and the two fork levers 8 are respectively located outside the two ends of the drive gear 3, and the drive gear 3 can be driven by the lever 7 along the The drive shaft 4 moves axially.

Each collar 9 at both ends of the driving lever 7 is connected with a soft rope 14 respectively, and one end of the two soft ropes 14 is respectively wound and connected on each reel 15 on the drive shaft 4, and the other ends of the two soft ropes 14 are respectively connected with a stopper. Mechanism 18, the shift rod 13 provided on the driving rod 7 can be connected to the stop mechanism 18, the driving rod 7 is sleeved with a spring 24, and the soft rope 14 passes through the outer end of the spring 24. 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 tendency 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 24 on the driving rod 7 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.

When the drive gear 3 meshes with the first gear 1, the reel 15 near the second gear 2 side will tighten up its corresponding soft rope 14, and when the soft rope 14 is stretched to a certain degree, the soft rope 14 will The stop lever 19 is pulled so that the gear lever 13 breaks away from the constraint of the right-angled surface 23 of the wedge-shaped head 21. At this time, the spring 24 sleeved on the lever 7 drives the shift lever 8 of the lever 7, and the shift lever 8 will drive the gear 3 to Push in the direction of the second gear 2, and finally make the driving gear 3 mesh with the second gear 2, so that the driving shaft 4 is reversed; otherwise, the driving gear 3 is pushed to the direction of the first gear 1 and meshed.

The soft rope 14 is put through the outer end of the spring 24 on the driving lever 7 on the corresponding side, so that when the spring 24 is stretched, the corresponding auxiliary reel 15 will pull the soft rope 14 and pull the stop bar 19.

The two ends of the driving rod 7 are respectively slidably socketed on the corresponding sets of blocks 17, and the sets of blocks 17 can limit the movement posture of the driving rod 7, and at the same time, the sets of blocks 17 and the fork lever 8 can limit the spring 24 between them. On the lever 7, the two ends of the spring 24 are fixedly connected to the sleeve block 17 and the fork lever 8 respectively, so as to ensure that the lever 7 will not deviate excessively left and right, and only ensure that the driving gear 3 is between the first gear 1 and the second gear. Just change the meshing distance between 2.

Cover block 17 is positioned at two shift fork lever 8 outer sides, is covered with spring 24 on the cover block 17 between the cover block 17 that is close to each other and shift fork lever 8, and spring 24 two ends are fixedly connected cover block 17 and shift fork lever 8 respectively. When the driving gear 3 meshes with the first gear 1, the stop mechanism 18 limits the gear lever 13, the spring 24 close to the first gear 1 on the driving lever 7 is compressed, and the spring 24 close to the second gear 2 is stretched, so that the two The spring 24 forms the elastic potential energy that drives the shift lever 7 to move toward the second gear 2. It only needs the soft rope 14 to pull the stop lever 19 to activate the gear lever 13 to break away from the right-angled surface 23 to make the shift lever 7 quickly move toward the second gear 2 side. movement, and make the gear lever 13 bound by the stop mechanism 18 on the other side; then when the second gear 2 is driven to rotate in reverse, the symmetrical mechanism on the other side repeats the above-mentioned movement action in reverse, and continues to circulate.

The stop mechanism 18 comprises a stop bar 19 with a wedge-shaped head 21 at one end and a fixed plate 20, the wedge-shaped head 21 of the stop bar 19 stretches out from one side of the fixed plate 20, and the other end of the stop bar 19 is sheathed with a spring 24 extending out of the fixed plate On the outside of the other surface of 20, the two ends of spring 24 are respectively fixed on the fixed plate 20 and the stop bar 19. The wedge-shaped head 21 includes a wedge-shaped surface 22 and a right-angled surface 23 , and the right-angled surface 23 is parallel to the axis of the gear rod 13 . The wedge-shaped surfaces 22 of the two stop mechanisms 18 are relatively arranged, so that when the gear bar 13 moves at a relatively high speed towards the wedge-shaped surface 22, the gear bar 13 can easily pass over the wedge-shaped surface 22 and be blocked by the right-angled surface 23; At 22 o'clock, the gear rod 13 will axially press the stop rod 19 toward the stop rod 19, so that the stop rod 19 will not completely block the gear rod 13. The spring 24 on the stop mechanism 18 can immediately reset the stop rod 19 that produces displacement.

The soft rope 14 between the collar 9 and the stop mechanism 18 is also sleeved on a direction guide ring 16, and the guide ring 16 provided can keep the two soft ropes 14 from being entangled at will, while the same soft rope 14 is not too baggy.

Two soft ropes 14 are intersected between the two stop structures and the two guide rings 16, and the intersected soft ropes 14 can ensure that the reel 15 close to the first gear 1 is linked with the stop mechanism 18 close to the second gear 2, or close to the first gear 1. The winding wheel 15 of the second gear 2 is linked with the stop mechanism 18 close to the first gear 1 . When one reel 15 winds the soft rope 14, the other reel 15 unwinds the soft rope 14 and keeps in sync all the time to ensure that when the soft rope 14 on one side is tightened and stretched, the other soft rope 14 is unwound Go out, provide margin for the movement of the driving lever 7, and the displacement of the driving lever 7 will not be bound by the soft rope 14.

The drive gear 3 feather key 5 is arranged on the drive shaft 4. 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 be along the The circumferential direction moves relative to the drive shaft 4 , and on the other hand, the drive gear 3 can slide along the axial direction of the drive shaft 4 to ensure that the drive gear 3 moves between the first gear 1 and the second gear 2 .

The moving distance of the drive gear 3 on the feather key 5 of the drive shaft 4 is the axial distance between the first gear 1 and the second gear 2. The first gear 1 is coaxially connected with a transmission gear 6, and the transmission gear 6 and the second gear 2 meshing, the transmission gear 6 is coaxial with the first gear 1, and the second gear 2 is meshed with the transmission gear 6, realizing the reverse rotation of the first gear 1 and the second gear 2.

One side of the driving lever 7 is also provided with a pull ring 12, and the collar 9 on the side corresponding to the position of the pull ring 12 is a double-ring structure including a first ring 10 and a second ring 11, and the soft rope 14 passes through the first ring in turn. 10. Pulling ring 12 and second ring 11, soft rope 14 is formed by the guidance of pulling ring 12, first ring 10 and second ring 11 and is perpendicular to driving lever 7 and turns to soft rope 14 part, so that The opposite fixed driving rod 7 will not form self-rotation, thereby ensuring that the shifting fork rod 8 will not rotate with the driving rod 7 as the center of circle, so that the shifting fork rod 8 will not deviate from the end that will break away from the driving gear 3 .

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 driving rod 7 can only move along the axial direction of the driving rod 7 itself under the restriction of the cover block 17, but the driving rod 7 cannot rotate along the axial direction of the driving rod itself in the cover block 17, so that the movement on the driving rod 7 is guaranteed. 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 utility model, and through the above description, relevant personnel can make various changes and modifications within the scope of not deviating from the technical idea of the utility model. The technical scope of this utility model is not limited to the content in the description, but must be determined according to the scope of the claims.

Claims (10)

1. work enters a quick return motion mechanism, comprising: the driving mechanism be connected by shifting fork bar and toggle mechanism, be is characterized in that,

-described driving mechanism comprise can respectively with the actuation gear of the first gear and the second gears meshing, described actuation gear is slidably arranged on live axle, and described first gear is contrary with described second gear sense of rotation;

-described toggle mechanism comprises the driving lever sliding and arrange, described driving lever is arranged two shifting fork bars, two shifting fork bars lay respectively at outside the two ends of described actuation gear, described driving lever two ends respectively each collar connect a tightrope, one end of tightrope described in two respectively reels on connection each rolling wheel on the driving shaft, the other end of tightrope described in two respectively connects a shut-down mechanism, the lever that described driving lever is provided with can be connected described shut-down mechanism, driving lever is arranged with spring, and described tightrope is through described spring outwards one end.

2. a kind of work according to claim 1 enters quick return motion mechanism, it is characterized in that: described driving lever two ends are slidably socketed respectively on each self-corresponding cover block.

3. a kind of work according to claim 2 enters quick return motion mechanism, it is characterized in that: described cover block is positioned at outside shifting fork bar described in two, on cover block between cover block close to each other and shifting fork bar, cover has spring, and described both ends of the spring is fixedly connected with described cover block and shifting fork bar respectively.

4. a kind of work according to claim 1 enters quick return motion mechanism, it is characterized in that: described shut-down mechanism comprises one end with the locking lever of sphenocephaly and a fixed plate, the sphenocephaly of described locking lever stretches out outside described fixed plate face, outside another face of stretching out described fixed plate of the sheathed spring of the described locking lever the other end, described both ends of the spring is separately fixed on described fixed plate and locking lever.

5. a kind of work according to claim 4 enters quick return motion mechanism, it is characterized in that: described sphenocephaly comprises a sphenoid surface and a right-angle surface, described right-angle surface and described lever axis being parallel.

6. a kind of work according to claim 1 enters quick return motion mechanism, it is characterized in that: the tightrope between the collar and described shut-down mechanism is also socketed in a direction guided rings.

7. a kind of work according to claim 6 enters quick return motion mechanism, it is characterized in that: tightrope described in two is arranged in a crossed manner between two stop structures and two guided rings.

8. a kind of work according to claim 7 enters quick return motion mechanism, it is characterized in that: described actuation gear feather key is arranged on described live axle, described actuation gear displacement distance on the feather key of live axle be namely described first gear and described second gear shaft to distance.

9. a kind of work according to claim 8 enters quick return motion mechanism, it is characterized in that: described first gear coaxial connection for transmission gear, described driving gear and described second gears meshing.

10. a kind of work according to claim 1 enters quick return motion mechanism, it is characterized in that: described driving lever side is also provided with stretch ring, be the twin nuclei comprising first ring and the second ring with the described collar of corresponding side, described stretch ring position, described tightrope is successively through first ring, stretch ring and the second ring.