CN105090389B - A kind of manually operated monocyclic-start mechanism - Google Patents

Abstract

The invention relates to a manually operated single-cycle motion mechanism, comprising: a driving mechanism connected by a shift fork and a toggle mechanism, the driving mechanism includes driving gears capable of meshing with the first gear and the second gear respectively, and the driving gear is slidably arranged on On the drive shaft, the first gear and the second gear rotate in opposite directions; the toggle mechanism includes a fixed plate, and the shift fork includes two shift fork levers located symmetrically on the same side and a shift lever on the other side. On the outside of both ends of the drive gear, the gear rod can be connected to the first stop mechanism. One end of the drive shaft is provided with a screw and a manual stop mechanism. The screw sleeve connected to one end of the bent rod is threaded on the screw rod; One stop mechanism, the fixed plate in the middle of the two first stop mechanisms is provided with a loop rod, the flexible rope connected to the free end of the bent rod passes through the loop on the loop rod, and is divided into two strands, each connected to a first stop mechanism, and the second Two ends of a spring are respectively connected to the free end of the bent rod and the shift fork.

Description

A manually operated single-cycle motion mechanism

technical field

The invention relates to a transmission conversion mechanism, in particular to a manually operated single-cycle movement 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. Therefore, in the case of low-speed operation and high power requirements, it is still necessary to use a reducer. When the power output by the motor is decelerated by the reducer, the torque can be increased. However, in the case of frequent cut-off of output power and frequent reversing, this type of device can only be realized by frequent start and stop of the motor, and frequent forward and reverse switching. Long-term use is not conducive to the normal operation of the motor. Therefore, it is necessary to design a set of mechanical transmission mechanism to realize the functions of frequent reversing and frequent cut-off of the output power under the condition of continuous and stable operation of the motor and reducer.

Contents of the invention

The invention overcomes the disadvantages of the prior art and provides a cyclic reciprocating mechanism excited by spring force.

In order to achieve the above object, the technical solution adopted by the present invention is: a manually operated single-cycle motion mechanism, including: a drive mechanism and a toggle mechanism connected by a shift fork, characterized in that,

- the drive mechanism can drive the drive gear to rotate forward and reverse;

- the toggle mechanism includes a fixed plate, the shift fork includes two shift fork levers symmetrically arranged on the same side and a gear lever on the other side, and the two shift fork levers are respectively located outside the two ends of the drive gear, so The gear rod can be connected to the first stop mechanism, and one end of the drive shaft is provided with a screw rod, and the screw sleeve connected to one end of the bent rod is threaded on the screw rod; the fixed plate is provided with two first stop mechanisms, and the two The fixed plate in the middle of the first stop mechanism is provided with a ferrule rod and a manual stop mechanism, and the soft rope connected to the free end of the bent rod passes through the ferrule on the ferrule rod and is divided into two strands each connected to a first stop mechanism. mechanism, the two ends of the first spring are respectively connected to the free end of the curved rod and the shift fork.

In a preferred embodiment of the present invention, the first stop mechanism includes a stop lever with a wedge-shaped head at one end and a second spring, the wedge-shaped head of the stop lever protrudes outside one surface of the fixing plate, and the stop lever The other end of the rod is sheathed on the outside of the other surface of the second spring protruding from the fixing plate, and the two ends of the second 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 rod.

In a preferred embodiment of the present invention, the wedge-shaped surfaces on the two first stop mechanisms are opposite to each other; the wedge-shaped surface on the manual stop mechanism is opposite to the wedge-shaped surface on one of the first stop mechanisms.

In a preferred embodiment of the present invention, the end of the soft rope is connected to the end of the stop rod on the first stop mechanism, and the end of the stop rod on the manual stop mechanism is provided with a handle.

In a preferred embodiment of the present invention, the shift fork slides along the axis of the fixing plate, and the axis of the fixing plate is parallel to the axis of the driving shaft.

In a preferred embodiment of the present invention, the lead of the screw is greater than the distance between the two first stop mechanisms.

In a preferred embodiment of the present invention, the two first stop mechanisms are respectively close to the first gear and the second gear.

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 drive mechanism includes a first gear and a second gear that can respectively mesh with the drive gear, the drive gear is slidably arranged on the drive shaft, the first gear and the second gear The gears rotate in the opposite direction.

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 inertia and the elastic potential energy of the first spring stretched between the bending rod and the shift fork to mesh with the second gear; otherwise, the driving gear and the second gear When engaged, the toggle mechanism reverses motion of the drive gear.

(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 shift 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 shift fork.

(5) The structure of the screw and the screw sleeve is the main power source of the toggle mechanism, and at the same time, the elastic potential energy stored by the first spring is also gradually stored through the movement of the screw and the screw sleeve.

(6) When the first gear meshes with the drive gear, the screw sleeve drives the bent rod away from the drive gear, and the first spring is stretched to a certain extent to activate the first stop mechanism through the pull of the soft rope, and the gear lever is released from the restraint of the stop lever. At this time, the shift fork is pulled by the spring and drives the driving gear to disengage from the first gear, and moves towards the second gear, and uses inertia to mesh with the second gear; at this time, the second gear drives the driving gear to rotate in reverse so that the screw sleeve is on the screw rod It also moves in the opposite direction, moving towards the direction close to the drive gear, and thus reciprocates.

(7) When the driving gear meshes with the first gear, the first stop mechanism restricts the gear lever, the first spring connected to the curved rod is stretched, and the soft rope is tightened to gradually pull the stop lever to activate the gear lever to break away from the right-angled surface. Make the shift fork quickly move towards one side of the second gear, and make the gear lever bound by the first stop mechanism on the other side; then when the second gear is driven to rotate in reverse, the symmetrical other side mechanism repeats the above-mentioned movement in reverse , and loop continuously.

(8) Before the driving gear is out of engagement with the first gear, the first spring is in a stretched state, and then the first stop mechanism activates the movement of the shift fork, and the spring retracts rapidly. At this time, the driving gear is engaged with the second gear, and the screw sleeve is reversed. Movement, the two ends of the first spring are cross-transformed due to the position of the bent rod and the shift fork, and the two ends of the flexible spring follow the position of each other, and the first spring is reversely stretched under the continued movement of the screw sleeve.

(9) The wedge-shaped surfaces of the two first stop mechanisms are arranged 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 shift lever axially presses the stop lever towards the stop lever so that the stop lever does not completely block the shift lever.

(10) The second spring on the first stop mechanism can instantly reset the displaced stop lever.

(11) The soft ropes arranged in separate strands can ensure that the two stop levers on the two first stop mechanisms will be pulled synchronously, and the gear lever can easily move from the outside of one wedge-shaped surface to the outside of the other wedge-shaped surface. After reset, the gear lever is just blocked by another stop lever limit.

(12) The ferrule rod provided can keep the two soft ropes from being entangled randomly, and the soft ropes will not be too loose; The stop structure realizes the function of guiding the soft rope to transmit the pulling force.

(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 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.

(15) The collar rod and the two first stop mechanisms are arranged on the same fixed plate to ensure the stability of the force transmission of the soft rope; and the shift fork can move along the axis of the fixed plate to form a fixed reciprocating path.

(16) The handle can pull up the stop lever on the manual stop mechanism, so that the gear lever blocked by the right-angled surface on the manual stop mechanism can be released from the restraint, and the shift fork can continue to move left and right. As long as the mechanism is not pulled up, it can only Do single-period exercises.

(17) The position set by the manual stop mechanism can block the gear lever at the position where the drive gear is exactly between the first gear and the second gear, and the drive gear is disengaged at this time.

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 1 of the meshing state of the drive gear and the first gear in the preferred embodiment of the present invention;

Fig. 2 is a three-dimensional structural diagram of the meshing state of the driving gear and the first gear in the preferred embodiment of the present invention;

Fig. 3 is a three-dimensional structural view of the meshing state of the driving gear and the second gear in the preferred embodiment of the present invention;

Fig. 4 is the three-dimensional structure diagram of the toggle mechanism of the preferred embodiment of the present invention;

In the figure: 1. First gear, 2. Second gear, 3. Drive gear, 4. Drive shaft, 5. Feather key, 6. Fixed plate, 7. Shift fork, 8. Shift fork lever, 9. Shift lever , 10, screw rod, 11, screw sleeve, 12, bent rod, 13, first spring, 14, soft rope, 15, ferrule rod, 16, ferrule, 17, second spring, 18, first stop mechanism, 19. Stop lever, 21. Wedge head, 22. Wedge face, 23. Right-angle face, 24. Manual stop mechanism, 25. Handle, 26. Bolt locking device.

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 Figure 1-4, a manually operated single-cycle motion mechanism includes: a drive mechanism and a toggle mechanism connected by a shift fork 7,

- 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, the first gear 1 and the second gear 2 The direction of rotation is opposite;

- The toggling mechanism includes a fixed plate 6, and the shift fork 7 includes two shift fork rods 8 symmetrically arranged on the same side and a shift rod 9 on the other side, and the two shift fork rods 8 are respectively located on the drive Outside the two ends of the gear 3, the gear lever 9 can be connected to the first stop mechanism 18, and the two fork levers 8 are respectively located on both sides of the drive gear 3, and the drive gear 3 can be driven by the shift fork 7 along the 4 axis of the drive shaft. to the movement.

One end of the drive shaft 4 is provided with a screw rod 10 , and a screw sleeve 11 connected to one end of the bent rod 12 is threaded on the screw rod 10 ; the lead of the screw rod 10 is greater than the distance between the two first stop mechanisms 18 . The structure of the screw rod 10 and the screw sleeve 11 is the main power source of the toggle mechanism, and the elastic potential energy stored by the first spring 13 is also gradually stored by the movement of the screw rod 10 and the screw sleeve 11 .

The fixed plate 6 is provided with two first stop mechanisms 18, the two first stop mechanisms 18 are respectively close to the first gear 1 and the second gear 2, and the fixed plate 6 in the middle of the two first stop mechanisms 18 A collar bar 15 is provided, and the soft rope 14 connected to the free end of the bent bar 12 passes through the collar 16 on the collar bar 15 and is divided into two strands respectively connected to a first stop mechanism 18, and the ends of the soft rope 14 are connected Stop bar 19 ends, the ferrule bar 15 that is provided with can keep between two soft ropes 14 and can not be entwined at will, and soft rope 14 can not be too loose simultaneously; The other ends of the sub-branches are respectively connected with a stop structure to realize the function of guiding the soft rope 14 to transmit the pulling force. The soft rope 14 that splits is provided with can guarantee that two stop levers 19 on the two first stop mechanisms 18 will be pulled synchronously, and the gear bar 9 can easily move from the outside of one wedge-shaped surface 22 to the outside of the other wedge-shaped surface 22, After the stop bar 19 was reset, the gear lever 9 was just blocked by another stop bar 19 restriction.

The collar rod 15 and the two first stop mechanisms 18 are arranged together on the same fixed plate 6 to ensure the stability of the force transmission of the soft rope 14; and the shift fork 7 can move along the axis of the fixed plate 6 to form a fixed reciprocating motion path.

Both ends of the first spring 13 are respectively connected to the free end of the curved rod 12 and the shift fork 7 .

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 drive gear 3 is separated from the first gear 1, and driven by the elastic potential energy of the first spring 13 stretched between the bent rod 12 and the shift fork 7 and the second gear 2 On the contrary, when the driving gear 3 is meshed with the second gear 2, the toggle mechanism will make the driving gear 3 reversely move.

The second spring 17 on the first stop mechanism 18 can instantly reset the displaced stop rod 19 .

The first stop mechanism 18 includes a stop bar 19 with a wedge-shaped head 21 at one end and a second spring 17. The wedge-shaped head 21 of the stop bar 19 stretches out from one side of the fixed plate 6, and the other end of the stop bar 19 is sleeved with a second spring. The spring 17 protrudes outside the other surface of the fixing plate 6 , and the two ends of the second spring 17 are respectively fixed on the fixing plate 6 and the stop bar 19 .

The wedge-shaped head 21 includes a wedge-shaped surface 22 and a right-angled surface 23 , the right-angled surface 23 is parallel to the axis of the gear lever 9 .

The wedge-shaped surfaces 22 of the two wedge-shaped heads 21 are arranged oppositely, so that when the gear lever 9 moves at a relatively high speed towards the wedge-shaped surface 22, the gear lever 9 can easily pass over the wedge-shaped surface 22 and be blocked by the right-angled surface 23; When facing 22, the gear rod 9 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 9.

The shift fork 7 slides along the axis of the fixing plate 6 , and the axis of the fixing plate 6 is parallel to the axis of the drive shaft 4 .

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 . 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 distance between the two shift forks 7 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 .

When the first gear 1 meshes with the drive gear 3, the screw sleeve 11 drives the curved rod 12 away from the drive gear 3, and the first spring 13 is stretched to a certain extent to activate the first stop mechanism 18 by pulling the soft rope 14, and the gear lever 9 Break away from the shackles of the stop bar 19, at this time the shift fork 7 is pulled by the spring and drives the drive gear 3 to disengage from the first gear 1, and moves toward the second gear 2, and uses inertia to mesh with the second gear 2; at this time, the second gear 2 drives the drive gear 3 to rotate in reverse, so that the screw sleeve 11 also moves in reverse on the screw 10, and moves toward the direction close to the drive gear 3, thereby reciprocating.

When the driving gear 3 meshes with the first gear 1, the first stop mechanism 18 limits the gear lever 9, the first spring 13 connected to the curved lever 12 is stretched, and the soft rope 14 is tightened to gradually pull the stop lever 19 to activate the gear lever 9 Breaking away from the constraint of the right-angled surface 23 can make the shift fork 7 quickly move toward one side of the second gear 2, and make the gear lever 9 be bound by the first stop mechanism 18 on the other side; then when the second gear 2 is driven to rotate in reverse, The mechanism on the other side of the symmetry repeats the above-mentioned motions in reverse and continues to circulate.

Before the driving gear 3 is engaged with the first gear 1, the first spring 13 is in a stretched state, and then the first stop mechanism 18 activates the movement of the shift fork 7, and the spring retracts rapidly, at this time, the driving gear 3 is engaged with the second gear 2, The screw sleeve 11 moves in the opposite direction, and the two ends of the first spring 13 are alternately changed due to the position of the bent rod 12 and the shift fork 7. Stretch the first spring 13 toward.

The other end of the stop bar 19 of the manual stop mechanism 24 is provided with a handle 25, and the handle 25 can pull up the stop bar 19 on the manual stop mechanism 24, so that the gear lever 9 blocked by the right-angled surface 23 on the manual stop mechanism 24 can break away from the restraint , the shift fork 7 can continue to move left and right, as long as the mechanism is not pulled up, it can only do single-cycle motion, and the position of the manual stop mechanism 24 can block the gear lever 9 when the drive gear 3 is just located between the first gear 1 and the second gear. The position between the two gears 2, the drive gear 3 is out of mesh at this moment.

The wedge-shaped surfaces 22 on the two first stop mechanisms 18 are relatively arranged; if there is no manual stop mechanism 24 like this, the gear bar 9 can move out from the position between the two first stop mechanisms 18 along the wedge-shaped surfaces 22, but the gear The rod 9 cannot cross the right-angled surface 23 and enter between the two first stop mechanisms 18 at a position other than between the two first stop mechanisms 18 .

As shown in Figures 1 and 2, the wedge-shaped surface 22 on the manual stop mechanism 24 is set opposite to the wedge-shaped surface 22 on the first stop mechanism 18 on the right side, and the gear lever 9 can only cross the manual stop from the right side of the manual stop mechanism 24. The wedge-shaped surface 22 on the mechanism 24 reaches the left side of the manual stop mechanism 24, but the stop bar 9 cannot cross the right-angled surface 23 on the manual stop mechanism 24 from the left side of the manual stop mechanism 24 and reaches the right side of the manual stop mechanism 24.

The curved rod 12 is provided with a bolt locking device 26 at its corner, and the part of the curved rod 12 parallel to the drive shaft 4 can be inserted into the inner hole of the bolt locking device 26 and slide in the inner hole. The bolt locking device 26 The bolts on the top are screwed in and screwed out to control the tightness; by adjusting the relative position of the bent rod 12 and the bolt locking device 26, the position adjustment of the bent rod 12 to the shift fork rod 8 can be realized, so as to adjust the shifting of the shift fork rod 8 to the driving gear. timing.

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 manually operated single-cycle motion mechanism, comprising: a drive mechanism and a toggle mechanism connected by a shift fork, characterized in that, - the drive mechanism can drive the drive gear to rotate forward and reverse; - the toggle mechanism includes a fixed plate, the shift fork includes two shift fork levers symmetrically arranged on the same side and a gear lever on the other side, and the two shift fork levers are respectively located outside the two ends of the drive gear, so The gear rod can be connected with the first stop mechanism, and one end of the drive shaft is provided with a screw rod, and the screw sleeve connected to one end of the bent rod is threaded on the screw rod; the fixed plate is provided with two first stop mechanisms, and the two described The fixed plate in the middle of the first stop mechanism is provided with a loop rod and a manual stop mechanism, and the flexible rope connected to the free end of the bent rod passes through the loop on the loop rod, and is divided into two strands respectively connected to a first stop mechanism, The two ends of the first spring are respectively connected to the free end of the curved rod and the shift fork; The first stop mechanism includes a stop rod with a wedge-shaped head at one end and a second spring, the wedge-shaped head of the stop rod protrudes outside one surface of the fixed plate, and the other end of the stop rod is sleeved with the second spring. protruding from the outside of the other surface of the fixing plate, and the two ends of the second spring are respectively fixed on the fixing plate and the stop rod; The shift fork slides along the axis of the fixing plate, and the axis of the fixing plate is parallel to the axis of the driving shaft. 2 . The manually operated single-cycle motion mechanism according to claim 1 , wherein 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 lever. 3. A manually operated single-cycle motion mechanism according to claim 2, characterized in that: the wedge-shaped surfaces on the two first stop mechanisms are oppositely arranged; the wedge-shaped surfaces on the manual stop mechanism and one of the first stop mechanisms The wedge-shaped surfaces on a stop mechanism are arranged oppositely. 4. A manually operated single-cycle motion mechanism according to claim 1, characterized in that: the end of the soft rope is connected to the end of the stop rod on the first stop mechanism, and the end of the stop rod on the manual stop mechanism There is a handle at the end of the stop lever. 5 . The manually operated single-cycle motion mechanism according to claim 1 , wherein the lead of the screw rod is greater than the distance between the two first stop mechanisms. 5 . 6. The manually operated single-cycle motion mechanism according to claim 1, wherein the two first stop mechanisms are respectively close to the first gear and the second gear. 7. A manually operated single-cycle motion mechanism according to claim 6, characterized in that: the drive gear feather key is arranged on the drive shaft, and the drive gear moves a distance on the drive shaft feather key That is, the axial distance between the first gear and the second gear. 8. A manually operated single-cycle motion mechanism according to claim 1, characterized in that: said driving mechanism comprises a first gear and a second gear respectively capable of meshing with a driving gear, and said driving gear is slidably arranged on On the drive shaft, the first gear and the second gear rotate in opposite directions.