CN105179611B - One kind circulation drive mechanism - Google Patents

Abstract

The present invention relates to a cycle drive mechanism, comprising: a drive mechanism connected by a fork lever and a toggle mechanism, the drive mechanism includes a drive gear, the drive gear is 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 driving rod, on which two shifting fork rods are arranged, and the two shifting fork rods are respectively located outside the two ends of the driving gear; one end of the driving shaft is provided with a screw rod, and the screw sleeve for connecting the soft rope is threaded on the screw rod; The rod is connected to the shift rod through the first rotating shaft, the swing rod is connected to the pulley rod through the second rotating shaft, one end of the first spring is fixedly connected to the swing rod between the first rotating shaft and the second rotating shaft, and the other end of the first spring is fixedly connected to the fixed On the block, the first soft rope and the second soft rope are respectively connected to the swing rod from the directions on both sides of the swing rod between the first rotating shaft and the second rotating shaft, the first soft rope is directly connected to the swing rod from the nearest side, and the second soft rope is directly connected to the swing rod from the nearest side. The two soft ropes are guided by at least one pulley on the pulley bar and connected to the swing bar from the other side.

Description

A circular drive mechanism

technical field

The invention relates to a transmission conversion mechanism, in particular to a cycle drive mechanism.

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 first spring swing rod-assisted and flexible rope-constrained circulation drive mechanism.

In order to achieve the above object, the technical solution adopted by the present invention is: a cycle drive mechanism, including: 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 drive gear;

One end of the drive shaft is provided with a screw rod, and the threaded sleeve connected to the soft rope is sleeved on the screw rod; the swing rod is connected to the driving rod through the first rotating shaft, and the swing rod is connected to the pulley rod through the second rotating shaft, and one end of the first spring is fixed Connected to the swing link between the first rotating shaft and the second rotating shaft, the other end of the first spring is fixedly connected to the fixed block, and the first soft rope and the second soft rope swing from the first rotating shaft and the second rotating shaft respectively. The direction on both sides of the rod is connected to the swing rod, the first soft rope is directly connected to the swing rod from the nearest side, and the second soft rope is guided by at least one pulley on the pulley rod to connect to the swing rod from the other side.

In a preferred embodiment of the present invention,

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

- When the driving gear meshes with the second gear, the swing bar is biased toward the second gear, and the first spring is located at one side of the swing bar's biasing direction.

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

In a preferred embodiment of the present invention, the screw sleeve is close to the side of the second gear, the screw sleeve is connected to a bent rod, and the free end of the bent rod is connected to the soft rope.

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 first flexible rope is in a taut state prior to the second flexible rope;

- When the driving gear meshes with the second gear, the screw drives the screw sleeve close to the driving gear, and the second flexible rope is in a tensioned state prior to the first flexible rope.

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 first 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 make the driving gear reverse movement.

(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 at the same time, the stopper can limit the swing lever driven by the first 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 excessive The left and right offsets only ensure the distance between the first gear and the second gear for the drive gear to change mesh.

(6) When the driving gear meshes with the first gear, the pendulum shifts toward the side of the first gear. At this time, the first spring tightens the pendulum, and the screw sleeve is driven away from the first gear by the screw rod, and then the first soft rope is first Tighten it, and then pull the pendulum to rotate towards the second gear. When the pendulum is over the vertical state, the driving gear will be separated from the first gear. At this time, the tension of the first spring will move the pendulum towards the second gear. Pull and swing the lever towards the second gear, and finally press the drive gear to mesh 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 mutual cooperation between the first rotating shaft and the second rotating shaft enables the pendulum to rotate with the second rotating shaft as the center of a circle, drives the shift lever to move left and right, and then drives the shift fork lever to follow the shift rod to move left and right.

(9) Two pulleys are set on the left and right sides of the second rotating shaft. After the second soft rope bypasses the two pulleys, the changed second soft rope pulls the direction of the pendulum to ensure that the two soft ropes can move from different directions. Pull the lever.

(10) During the left and right movement of the bending rod, the first soft rope and the second soft rope can achieve an asynchronous preferential tightening state, so that the pendulum can only be tightened by one soft rope at the same time.

(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) When the driving gear meshes with the first gear, the reel close to the second gear will tighten its corresponding soft rope. When the soft rope is stretched to a certain degree, the soft rope will pull the pendulum. At this time, the fork lever on the shift lever moves, and the fork lever pushes the driving gear to the direction of the second gear, and finally makes the driving gear mesh with the second gear, so that the driving shaft reverses; otherwise, the driving gear is pushed to the first gear. gear direction and mesh.

(14) 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.

(15) The distance between the two shift fork rods is greater than the axial length of the drive gear, and the length longer than the drive 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 in 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.

(16) 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, swing rod, 15, first rotating shaft, 16, second rotating shaft, 17, fixed block, 18, pulley rod, 19, pulley, 20, first Spring, 21, block, 22, the first soft rope, 23, the second soft rope.

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 Figures 1 and 2, a circular drive mechanism includes: a drive 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 action can change the position of the driving gear 3 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, because the first gear 1 and the second gear 2 rotate in opposite directions, it is guaranteed that each After the secondary driving gear 3 changes the meshing object, the driving shaft 4 all changes the direction of rotation.

The toggling mechanism includes a sliding lever 7, on which two fork levers 8 are arranged. Axis 4 moves axially.

One end of the drive shaft 4 is provided with a screw rod 10, and the threaded sleeve 11 connected to the soft rope 14 is threaded on the screw rod 10; 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 fork 13 is connected to the shift lever 7 through the first rotating shaft 15, the fork 13 is connected to the pulley lever 18 through the second rotating shaft 16, and one end of the first spring 20 is fixedly connected to the fork 13 between the first rotating shaft 15 and the second rotating shaft 16. The other end of the first spring 20 is fixedly connected to the fixed block 17 . The mutual cooperation of the first rotating shaft 15 and the second rotating shaft 16 enables the swing lever 13 to rotate with the second rotating shaft 16 as the center of a circle, driving the driving rod 7 to move left and right, and then driving the shift fork rod 8 to follow the driving rod 7 to move left and right.

The first flexible rope 22 and the second flexible rope 23 are respectively connected to the swing lever 13 from the direction on both sides of the swing lever 13 between the first rotating shaft 15 and the second rotating shaft 16, and the first flexible rope 22 is directly connected from the nearest side. Fork 13, the second soft rope 23 is guided by at least one pulley 19 on the pulley bar 18 and connected with fork 13 from the other side. Two pulleys 19 are arranged on the left and right sides of the second rotating shaft 16. After the second soft rope 23 bypasses the two pulleys 19, the transformed second soft rope 23 pulls the direction of the pendulum 13 to ensure that the two soft ropes 14 can be moved separately. Pull the swing lever 13 from different directions. During the left and right movement of the curved rod 12, the first flexible rope 22 and the second flexible rope 23 can achieve an asynchronous priority tension state, so that the swing rod 13 can only be tightened by one flexible rope 14 at the same time. .

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 first spring 20 on the fork 13 to mesh with the second gear 2; otherwise, the driving gear 3 and the second gear 2 When engaged, 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.

When the driving gear 3 meshes with the first gear 1, the swing lever 13 is biased towards the direction of the first gear 1, and the first spring 20 is located on one side of the offset direction of the swing lever 13; when the driving gear 3 is meshed with the second gear 2, the swing lever 13 is biased toward In the direction of the second gear 2 , the first spring 20 is located on one side of the shifting direction of the swing rod 13 . When the driving gear 3 is meshed with the first gear 1, the swing rod 13 is shifted toward the first gear 1 side, at this moment, the first spring 20 tightens the swing rod 13, and the screw sleeve 11 is driven away from the first gear 1 by the screw rod 10, and then The first soft rope 22 is first tightened, and then the swing lever 13 is pulled to rotate towards the second gear 2. When the swing lever 13 crosses the vertical state, the drive gear 3 is disengaged from the first gear 1. At this time, the first spring 20 The pulling force will pull the swing bar 13 towards the second gear 2, swing the swing bar 13 towards the second gear 2, and finally press the driving gear 3 to mesh with the second gear 2.

The first spring 20 is in tension.

The screw sleeve 11 is close to the side of the second gear 2 , the screw sleeve 11 is connected to the bent rod 12 , and the free end of the bent rod 12 is connected to the soft rope 14 .

When the driving gear 3 meshes with the first gear 1, the screw 10 drives the screw sleeve 11 away from the driving gear 3, and the first soft rope 22 is in a tight state before the second soft rope 23; when the driving gear 3 meshes with the second gear 2, The screw rod 10 drives the screw sleeve 11 to approach the driving gear 3 , and the second flexible rope 23 is in a taut state prior to the first flexible rope 22 . When the drive gear 3 meshes with the first gear 1, the reel close to the second gear 2 will tighten its corresponding soft rope 14, and when the soft rope 14 is stretched to a certain degree, the soft rope 14 will swing Rod 13 pulls, and now the fork lever 8 on the driving lever 7 moves, and the fork lever 8 pushes the driving gear 3 to the direction of the second gear 2, and finally makes the driving gear 3 mesh with the second gear 2, so that the driving shaft 4 Reverse; On the contrary, the drive gear 3 is pushed to the direction of the first gear 1 and engaged.

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 13 is in the vertical state, the two fork rods 8 will not be blocked by the drive gear 3, and the fork 13 only needs to rely on inertia when it crosses its vertical state.

Fork 13 free ends both sides are respectively provided with a stopper 21, and the setting of stopper 21 guarantees that the lower end of fork 13 can not deviate beyond the range, that is fork 13 can not make driving lever 7 move too much.

The two ends of the driving rod 7 are respectively slidably socketed on the respective corresponding sets of blocks 9, the sets of blocks 9 can limit the movement posture of the driving rod 7, and at the same time, the stopper 21 can limit the swing rod 13 driven by the first spring 20 to a certain swing. Within the range, and then the range of movement of the driving rod 7 is also limited, so as to ensure that the driving rod 7 will not deviate excessively left and right, and only ensure that the driving gear 3 changes the meshing distance between the first gear 1 and the second gear 2.

The drive gear 3 feather key 5 is arranged on the drive shaft 4, and 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 structure of the feather key 5 on the one hand It can ensure that there is a clamp limit along the circumference of the drive shaft 4 between the drive gear 3 and the drive shaft 4, and ensure that the drive gear 3 will not move relative to the drive shaft 4 along the circumference. On the other hand, the drive gear 3 can move along the drive shaft 4. 4 to ensure that the drive 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 (8)

1. A circular drive mechanism, 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 drive gear; One end of the drive shaft is provided with a screw rod, and the threaded sleeve connected to the soft rope is sleeved on the screw rod; the swing rod is connected to the driving rod through the first rotating shaft, and the swing rod is connected to the pulley rod through the second rotating shaft, and one end of the first spring is fixed Connected to the swing link between the first rotating shaft and the second rotating shaft, the other end of the first spring is fixedly connected to the fixed block, and the first soft rope and the second soft rope swing from the first rotating shaft and the second rotating shaft respectively. The direction on both sides of the rod is connected to the swing rod, the first soft rope is directly connected to the swing rod from the nearest side, and the second soft rope is guided by at least one pulley on the pulley rod to connect to the swing rod from the other side; - when the driving gear meshes with the first gear, the swing bar is biased towards the first gear, and the first spring is located on one side of the swing bar's offset direction; - when the driving gear meshes with the second gear, the swing bar is biased towards the second gear, and the first spring is located on one side of the swing bar's offset direction; The distance between the two shift fork rods is greater than the axial length of the driving gear. 2. The cycle driving mechanism according to claim 1, wherein the first spring is in a stretched state. 3. A cycle driving mechanism according to claim 1, characterized in that: the screw sleeve is close to the side of the second gear, the screw sleeve is connected to a bent rod, and the free end of the bent rod is connected to the soft gear. rope. 4. A circulating drive mechanism according to claim 1 or 3, 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 first flexible rope is in a taut state prior to the second flexible rope; - When the driving gear meshes with the second gear, the screw drives the screw sleeve close to the driving gear, and the second flexible rope is in a tensioned state prior to the first flexible rope. 5 . The cycle driving mechanism according to claim 1 , wherein a stopper is provided on both sides of the free end of the swing rod. 6 . 6 . The cycle driving mechanism according to claim 1 , characterized in that: the two ends of the driving rod are respectively slidably socketed on the corresponding sets. 6 . 7. A circular drive mechanism according to claim 1, characterized in that: the drive gear feather key is arranged on the drive shaft, and the driving gear moves on the drive shaft feather key is the The axial distance between the first gear and the second gear. 8 . The cycle driving mechanism according to claim 7 , wherein the first gear is coaxially connected with a transmission gear, and the transmission gear meshes with the second gear.