CN210826525U - Rotary speed change mechanism and textile opening device with same - Google Patents
Rotary speed change mechanism and textile opening device with same Download PDFInfo
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- CN210826525U CN210826525U CN201921379543.3U CN201921379543U CN210826525U CN 210826525 U CN210826525 U CN 210826525U CN 201921379543 U CN201921379543 U CN 201921379543U CN 210826525 U CN210826525 U CN 210826525U
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Abstract
The utility model relates to a rotary speed change mechanism and a textile shedding device with the same, which are characterized in that the rotary speed change mechanism comprises a fixed seat, a conjugate cam, an input shaft and an output shaft; and a follower, a conjugate engagement portion and a control arm disposed between the input shaft and the output shaft; the driven part is connected with the input shaft through a first revolute pair, and the rotation axis of the first revolute pair is parallel to the axis of the input shaft; the two conjugate engaging parts are integrally formed or arranged at preset positions of the driven part and respectively engaged with the two cam curved surfaces of the conjugate cam in a conjugate manner; the control arm is linked between the driven part and the output shaft, one end of the control arm is rotatably connected with the driven part, and the other end of the control arm is rotatably connected with the output shaft. The utility model also relates to a weaving opening device with rotatory speed change mechanism. The rotary speed change mechanism is used for driving a textile shedding device, can prolong effective shedding time so as to meet the requirement of weft insertion of a wide loom, and is more suitable for high-speed weaving.
Description
Technical Field
The utility model belongs to the technical field of weaving equipment technique and specifically relates to a be applied to spinning opening mechanism's rotatory speed change mechanism.
Background
Weaving is a process in which warp and weft yarns are interwoven on a loom to form a fabric. In the weaving process, the effective opening time is an important technological parameter, and has great influence on the normal running of the loom and the physical performance of the fabric. The effective opening time as referred to herein means a time range in which the opening height is larger than the minimum effective opening. The minimum effective shedding means a minimum shedding height that can satisfy weaving, and the minimum effective shedding varies depending on a loom and a weaving kind.
At present, three common shedding mechanisms for weaving include cam shedding, dobby and jacquard. When the shedding device is used for a wide loom, the effective shedding time is difficult to meet the requirement of the wide loom on weft insertion due to the long weft insertion time required by the wide loom, and the conventional method is to increase the maximum shedding height so as to prolong the effective shedding time. The increase of the maximum shedding height can increase the pulling force applied to the warp at the maximum shedding, increase the tension change of the warp, increase the load of the shedding device and other factors which are not beneficial to weaving in the weaving process, and are not beneficial to high-speed weaving.
Therefore, the rotary speed change mechanism is disclosed, which is taken as a driving mechanism of the textile opening device and has very positive and important significance for prolonging the effective opening time.
Disclosure of Invention
The utility model aims at providing a rotatory speed change mechanism and have weaving opening device of this mechanism. The rotary speed change mechanism is used for driving a textile shedding device, can prolong effective shedding time so as to meet the requirement of weft insertion of a wide loom, and is more suitable for high-speed weaving.
In order to solve the above problems, the utility model adopts the following technical scheme:
a rotary speed change mechanism is characterized in that the structure comprises:
the device comprises a fixed seat used for providing support and mounting foundation for other components, a conjugate cam fixedly connected on the fixed seat, an input shaft used for providing initial rotating speed and torque, and an output shaft used for outputting final rotating speed and torque; and a follower, a conjugate engagement portion and a control arm disposed between the input shaft and the output shaft;
the driven part is used for transmitting torque from the input shaft, is connected with the input shaft through a first revolute pair, and the rotating axis of the first revolute pair is parallel to the axis of the input shaft;
the two conjugate engaging parts are integrally formed or arranged at preset positions of the driven part and respectively engaged with the two cam curved surfaces of the conjugate cam in a conjugate manner;
the control arm is linked between the driven part and the output shaft, one end of the control arm is rotatably connected with the driven part, and the other end of the control arm is rotatably connected with the output shaft and used for receiving the rotating torque of the driven part and transmitting the rotating torque to the output shaft.
The fixing seat is provided with a fixing seat central shaft hole, the conjugate cam is provided with a rotating central shaft hole, and the output shaft penetrates through the conjugate cam and is rotatably installed in the central shaft holes of the conjugate cam and the fixing seat.
The speed change mechanism further comprises a shell matched with the fixing seat, the shell is fixedly connected with the fixing seat, a shell central shaft hole is formed in the shell, and the input shaft penetrates through and is rotatably installed in the shell central shaft hole.
The input shaft and the output shaft are concentric and are connected through a revolute pair in an unconstrained relationship.
The input shaft comprises an input shaft end penetrating and extending to the outside of the shell and a linkage matching end positioned in the shell, the linkage end comprises two disk bodies which are in an integral structure or fixedly connected by multiple components and are parallel to each other, the two disk bodies are respectively provided with an input shaft hole, and the axes of the two input shaft holes are parallel to the axis of the input shaft; the follower is equipped with two follower pivots, the axle center coincidence of two follower pivots is just parallel with the axle center of input shaft, through two follower pivots and two input shaft holes, has constituted the normal running fit relation between input shaft and the follower, promptly revolute pair one.
The conjugate cam is formed by combining a first cam plate and a second cam plate, and cam curved surfaces of the first cam plate and the second cam plate are respectively conjugated and constrained with conjugate meshing parts on the driven part.
The conjugate engaging part is designed as a part of the driven part, or is fixedly connected with the driven part by adopting a separate member;
the structure form of the conjugate meshing part adopts two curved surface structures which form sliding friction with the curved surface of the conjugate cam, or adopts two roller structures which form rolling friction with the curved surface of the conjugate cam.
The control arm is used for establishing a force transmission and constraint relation between the driven part and the output shaft, and the implementation mode adopts a connecting rod structure or a shifting fork structure;
the connecting rod structure comprises a connecting rod, one end of the connecting rod is rotatably connected with the driven part, and the other end of the connecting rod is rotatably connected with the output shaft;
the shifting fork structure comprises a shifting fork fixed on the driven part and a sliding block arranged on the output shaft, and the sliding block is matched in a fork groove formed in the shifting fork.
The textile opening device is characterized in that the rotating speed change mechanism with the structure is adopted.
The input shaft rotates at a constant speed to drive the driven part on the input shaft to move around the conjugate cam, the rotation of the input shaft is transmitted to the output shaft through the control arm, the driven part moves around a self rotating shaft according to the shape of the conjugate cam and is superposed on the rotation of the output shaft through the control arm, and when the rotation direction of the input shaft is the same as the movement direction of the output shaft generated by the driven part moving around the self rotating shaft and a plurality of connecting rods, the rotation speed of the output shaft is greater than that of the input shaft, and conversely, the rotation speed of the output shaft is less than that.
The change of the rotation speed of the output shaft is the result of the common action of the uniform rotation of the input shaft and the continuous adjustment of the relative angle of the input shaft and the output shaft by the conjugate cam system. The motion change rule of the output shaft depends on the motion rule of a conjugate cam system consisting of a conjugate cam and a driven part, and the design parameters of the conjugate cam system are designed according to actual requirements.
The utility model discloses a rotatory speed change mechanism constitutes conjugate cam system by conjugate cam and follower, and the follower follows the input shaft motion to according to the shape of conjugate cam around self pivot motion, finally transmit power and moment of torsion for the output shaft according to the restraint relation of follower and input shaft. The output shaft rotates at a variable speed when the input shaft rotates at a constant speed, namely the input shaft rotates at a constant speed for a circle, and the speed of the output shaft changes continuously in the circle. Will the utility model discloses a rotatory speed change mechanism is used for driving weaving machine opening device, can prolong effective opening time, compensaties the not enough defect of effective opening time of opening device cooperation broad width loom.
Drawings
FIG. 1: a schematic structural diagram of a rotational speed change mechanism according to the first embodiment (the control arm is a link structure);
FIG. 2: a structural schematic diagram of a rotary speed change mechanism (conjugate meshing part is a roller structure) of the second embodiment;
FIG. 3: a structural schematic diagram of a rotary speed change mechanism (a control arm is of a shifting fork structure) of the third embodiment;
FIG. 4: the structure of the rotary speed-changing mechanism in the fourth embodiment is schematically shown (two sets of conjugate cams and two sets of driven members);
FIG. 5: the fifth embodiment of the present invention is a schematic structural view of a rotary speed change mechanism (one set of conjugate cams, two sets of followers);
in the figure, 1, an input shaft, 11, an input shaft hole, 12, a disc body, 2, an output shaft, 21, an output shaft hole, 3, a conjugate cam, 31, a first cam disc, 32, a second cam disc, 33, a rotating central shaft hole, 34, a first mounting screw hole, 4, a driven part, 4a, a first driven part, 4a1, a first driven part rotating shaft, 4a5, a first shift fork, 4b, a second driven part, 4b1, a second driven part rotating shaft, 4b5, a second shift fork, 41, a driven part rotating shaft, 42, a connecting rod shaft, 43, a first curved surface, 44, a second curved surface, 45, a shift fork, 5, a connecting rod, 51, a first connecting rod hole, 52, a second connecting rod hole, 6, a fixed seat, 61, a fixed seat central shaft hole, 62, a second mounting screw hole, 63, a first connecting hole, 7, a shell, 71, a shell central shaft hole, 72, a second connecting hole, 73, an oil filling hole, 74, a, 5a, a slide block, 5a1 and a slide block mounting hole.
Detailed Description
The following description of the present invention will be provided with reference to the accompanying drawings, which are used to explain the structure, design principles and operation of the present invention in further detail. It should be understood that the following examples are only selected to fully illustrate the technical solution of the present invention and should not be taken as limiting the scope of the present invention.
Example one
The embodiment discloses a rotary speed change mechanism mainly realized by a connecting rod structure, and the main parts of the rotary speed change mechanism comprise: input shaft 1, output shaft 2, conjugate cam 3, follower 4, connecting rod 5, fixing base 6, casing 7. The conjugate cam 3, the driven piece 4, the connecting rod 5 and the fixed seat 6 are arranged in a shell inner cavity formed by assembling the fixed seat 6 and the shell 7; the shell 7 is provided with a shell central shaft hole 71, the fixed seat 6 is provided with a fixed seat central shaft hole 61, and the input shaft 1 and the output shaft 2 are respectively connected with the shell 7 and a central shaft hole revolute pair arranged on the fixed seat 6 through respective shaft ends.
The specific structure of each component is described in detail below:
input shaft 1 is used for accepting outside initial rotational speed and moment of torsion, and its structure is including running through and extending to the outside input axle head of casing 7 and being located linkage cooperation end in the casing 7, the linkage end is including being an organic whole structure and two disk bodies 12 that are parallel to each other, corresponds respectively on two disk bodies 12 and has seted up input shaft hole 11, and the axle center of two input shaft holes 11 is parallel to each other with the axle center of input shaft 1, input shaft hole 11 be used for rotating and connect follower 4.
The driven part 4 is in linkage fit with the input shaft 1 through a revolute pair and structurally comprises two driven part rotating shafts 41, and the driven part rotating shafts 41 are rotatably arranged in two input shaft holes 11 of the input shaft 1; a first curved surface 43 and a second curved surface 44 are arranged at preset positions of the driven part 4, and are matched with the conjugate cam 3 through two curved surface structures which are respectively in friction fit with cam curved surfaces of two cam discs of the conjugate cam 3 to form a conjugate constraint relation; a connecting rod 5 is arranged between the driven part 4 and the output shaft 2.
The connecting rod 5 is provided with a first connecting rod hole 51 and a second connecting rod hole 52, wherein the first connecting rod hole 51 is in rotating fit with the connecting rod shaft 42 arranged on the driven part 4 in a protruding mode, and the second connecting rod hole 52 is connected with the reserved output shaft hole 21 on the output shaft 2 through a rotating pair.
The conjugate cam 3 consists of a first cam disc 31 and a second cam disc 32, wherein the first cam disc is provided with a rotating central shaft hole 33 and a first mounting screw hole 34 which is arranged along the outer edge of the rotating central shaft hole 33, the fixed seat 6 is provided with a second mounting screw hole 62 which is matched with the first mounting screw hole 34, and the conjugate cam 3 is fixedly connected to the fixed seat 6 through the first mounting screw hole 34 and the second mounting screw hole 62; the cam plate I31 and the cam plate II 32 are respectively in conjugate constraint with a curved surface I43 and a curved surface II 44 arranged on the driven part 4.
The output shaft 2 is used for outputting the final rotating speed and the final torque after the speed change to the outside, one end of the output shaft is connected with the revolute pair of the input shaft 1 and is matched with the linkage end of the input shaft 1 through the driven part 4 and the connecting rod 5, and the other end of the output shaft sequentially penetrates through the rotating central shaft hole 33 of the conjugate cam 3 and the fixing seat central shaft hole 61 of the fixing seat 6 and finally extends to the outside of the fixing seat 6.
The assembly relationship between the fixed seat 6 and the shell 7 is as follows: and a circle of fixing seat connecting holes 63 are distributed on the periphery of the fixing seat 6 in the circumferential direction, a circle of shell connecting holes 72 are correspondingly distributed on the periphery of the shell 7 in the circumferential direction, and the two corresponding connecting holes are connected together through a connecting piece.
The housing 7 has a housing center shaft hole 71 for passing through the input shaft 1, and is provided with an oil filler hole 73, an oil drain hole 74, and an oil mirror mounting hole 75.
The operation of the rotational speed change mechanism of the present embodiment is as follows:
when the input shaft 1 rotates at a constant speed under the action of external force, the conjugate cam 3 in the mechanism is fixed due to the fixed relation with the fixed seat 6, and at the moment, due to the rotating relation between the driven part 4 and the input shaft 1, the rotating torque of the input shaft 1 is transmitted to the driven part 4, so that the driven part 4 generates a motion trend in a set direction; because of the conjugate meshing relationship between the two curved surface structures on the driven member 4 and the conjugate cam 3, the driven member 4 finally rotates around the axis thereof under the combined action of the input shaft 1 and the conjugate cam 3, and the connecting rod 5 is linked with the driven member 4 and the output shaft 2 at the same time, so that when the driven member 4 rotates, the connecting rod 5 drags the output shaft 2 to complete the rotation. When the rotation direction of the input shaft 1 is the same as the movement direction of the output shaft 2 generated by the driven member 4 moving around the self rotating shaft and through the multi-connecting rod, the rotation speed of the output shaft is larger than that of the input shaft, and conversely, the rotation speed of the output shaft is smaller than that of the input shaft.
Example two
In the rotary speed change mechanism of the present embodiment, in place of the two curved surface structures of the follower 4, the follower 4 is provided with a bearing-like member based on the first embodiment. Its main spare part includes: fixing base 6, casing 7, input shaft 1, output shaft 2, conjugate cam 3, follower 4 and connecting rod 5.
The specific assembly structure is as follows:
the shell 7 and the fixed seat 6 are used for assembling to form a support frame body of the whole mechanism, and the shell 7 is respectively provided with a shell central shaft hole 71, a connecting hole II 72, an oil filling hole 73, an oil drain hole 74 and an oil lens mounting hole 75; the fixing seat 6 is respectively provided with a fixing seat central shaft hole 61, a second mounting screw hole 62 and a first connecting hole 63, wherein the central lines of the fixing seat central shaft hole 61 and the shell central shaft hole 71 are on the same straight line. The first connecting hole 63 and the second connecting hole 72 are symmetrically arranged and fixedly connect the fixed seat 6 and the shell 7 together through the two holes.
The input shaft 1 provides initial rotating speed and torque, and structurally comprises an input shaft end and a linkage matching end, wherein the input shaft end penetrates through and is connected with a shell central shaft hole 61 rotating pair of the shell 7; the outer part of the shell 7 extends outwards to bear the external torque, and the inner part of the shell is fixedly connected with the linkage matching end; the linkage cooperation end is including being an organic whole structure and two disk bodies 12 that are parallel to each other, respectively has seted up an input shaft hole 11 on two disk bodies 12, and the axle center coincidence in two input shaft holes just is parallel with the input shaft axle center, and two input shaft holes 11 are used for rotating to connect follower 4.
The driven part 4 comprises two driven part rotating shafts 41, a connecting rod shaft 42 and two rollers 8, and the driven part 4 is connected with the two input shaft holes 11 on the input shaft 1 through the two driven part rotating shafts 41 in a rotating pair manner; thereby achieving a rotationally engaged relationship between the input shaft 1 and the driven member 4.
The connecting rod 5 is provided with a first connecting rod hole 51 and a second connecting rod hole 52, one end of the connecting rod 5 is in running fit with the connecting rod shaft 42 on the driven part 4 through the first connecting rod hole 51, the other end of the connecting rod 5 is in running fit with the reserved output shaft hole 21 of the output shaft 2 through the second connecting rod hole 52, and the two holes are additionally provided with a rotating pin or a bearing to realize running connection.
The conjugate cam 3 consists of a cam disc I31 and a cam disc II 32, and is provided with a rotating central shaft hole 33 and a first mounting screw hole 34 formed in the end face of the cam disc body; the rotating central shaft hole 33 is coaxial with the shaft center of the input shaft 1; the conjugate cam 3 is fixedly arranged on the inner side of the fixed seat 6 by connecting the first mounting screw hole 34 of the conjugate cam 3 with the second mounting screw hole 62 of the fixed seat 6; the cam plate I31 and the cam plate II 32 are respectively in conjugate constraint with two rollers 8 arranged on the driven part 4.
The output shaft 2 is used for outputting final rotating speed and torque, and structurally comprises an output shaft end and a linkage matching end, wherein the output shaft end penetrates through and is connected with a rotating pair of a fixed seat central shaft hole 61 of the fixed seat 6, extends outwards to the outside of the fixed seat 6 for outputting torque, and is matched with the driven part 4 and the connecting rod 5 in a linkage manner inwards; the output shaft 2 and the input shaft 1 are in rotational connection in an unconstrained relationship.
The operation of the rotational speed change mechanism of the present embodiment is as follows:
when the input shaft 1 rotates at a constant speed under the action of external force, the conjugate cam 3 in the mechanism is fixed due to the fixed relation with the fixed seat 6, and at the moment, due to the rotating relation between the driven part 4 and the input shaft 1, the rotating torque of the input shaft 1 is transmitted to the driven part 4, so that the driven part 4 generates a motion trend in a set direction; because of the conjugate engagement between the two rollers 8 on the driven member 4 and the conjugate cam 3, the driven member 4 finally rotates around its own axis under the combined action of the input shaft 1 and the conjugate cam 3, and because the connecting rod 5 is linked with the driven member 4 and the output shaft 2 at the same time, when the driven member 4 rotates, the connecting rod 5 drags the output shaft 2 to complete the rotation.
EXAMPLE III
In the rotary speed change mechanism of the present embodiment, the link 5 is eliminated, the follower 4 is provided with a fork structure, the output shaft 2 is provided with the slider 5a, and the slider 5a is placed in the fork of the follower 4. The main parts include: the device comprises an input shaft 1, an output shaft 2, a conjugate cam 3, a driven part 4, a sliding block 5a, a fixed seat 6, a shell 7 and a roller 8.
The specific assembly relationship is as follows:
the shell 7 and the fixed seat 6 are used for assembling to form a support frame body of the whole mechanism, and the shell 7 is respectively provided with a shell central shaft hole 71, a connecting hole II 72, an oil filling hole 73, an oil drain hole 74 and an oil lens mounting hole 75; the fixing seat 6 is respectively provided with a fixing seat central shaft hole 61, a second mounting screw hole 62 and a first connecting hole 63, wherein the central lines of the fixing seat central shaft hole 61 and the shell central shaft hole 71 are on the same straight line. The first connecting hole 63 and the second connecting hole 72 are symmetrically arranged and fixedly connect the fixed seat 6 and the shell 7 together through the two holes.
The input shaft 1 provides initial rotating speed and torque, and structurally comprises an input shaft end and a linkage matching end, wherein the input shaft end penetrates through and is connected with a shell central shaft hole 61 rotating pair of the shell 7; the outer part of the shell 7 extends outwards to bear the external torque, and the inner part of the shell is fixedly connected with the linkage matching end; the linkage matching end comprises two disc bodies 12 which are in an integral structure and parallel to each other, the two disc bodies 12 are respectively and correspondingly provided with an input shaft hole 11, and the two input shaft holes 11 are used for rotatably connecting the driven part 4.
The driven part 4 comprises two driven part rotating shafts 41, a shifting fork 45 and two rollers 8, and the driven part 4 is connected with two input shaft holes 11 on the input shaft 1 through the two driven part rotating shafts 41 in a rotating pair manner; thereby achieving a rotationally engaged relationship between the input shaft 1 and the driven member 4.
The driven part 4 with realize the linkage relation through the shift fork structure between the output shaft 2, the concrete structure does install a shift fork 45 that has the fork groove on the driven part 4 install a slider 5a through the revolute pair on the output shaft 2, slider 5a is arranged in the fork inslot of shift fork 45 and both sides and shift fork contact cooperation, stir slider 5a through shift fork 45 and realize the drive control to output shaft 2. The structure for rotatably mounting the slider 5a to the output shaft 2 is such that a slider mounting hole 5a1 provided in the slider 5a is connected to an output shaft hole 21 provided in the output shaft 2 via a revolute pair.
The conjugate cam 3 consists of a cam disc I31 and a cam disc II 32, and is provided with a rotating central shaft hole 33 and a first mounting screw hole 34 formed in the end face of the cam disc body; the rotating central shaft hole 33 is coaxial with the shaft center of the input shaft 1; the conjugate cam 3 is fixedly arranged on the inner side of the fixed seat 6 by connecting the first mounting screw hole 34 of the conjugate cam 3 with the second mounting screw hole 62 of the fixed seat 6; the cam plate I31 and the cam plate II 32 are respectively in conjugate constraint with two rollers 8 arranged on the driven part 4.
The output shaft 2 is used for outputting final rotating speed and torque, and structurally comprises an output shaft end and a linkage matching end, wherein the output shaft end penetrates through and is connected with a rotating pair of a fixed seat central shaft hole 61 of the fixed seat 6, extends outwards to the outside of the fixed seat 6 for outputting torque, and is inwards matched with the driven part 4 in a linkage manner; the output shaft 2 and the input shaft 1 are in rotational connection in an unconstrained relationship.
The operation of the rotational speed change mechanism of the present embodiment is as follows:
when the input shaft 1 rotates at a constant speed under the action of external force, the conjugate cam 3 in the mechanism is fixed due to the fixed relation with the fixed seat 6, and at the moment, due to the rotating relation between the driven part 4 and the input shaft 1, the rotating torque of the input shaft 1 is transmitted to the driven part 4, so that the driven part 4 generates a motion trend in a set direction; and because of the conjugate meshing relationship between the two rollers 8 on the driven member 4 and the conjugate cam 3, the driven member 4 finally rotates around its own axis under the combined action of the input shaft 1 and the conjugate cam 3, the shifting fork 45 shifts the sliding block 5a on the output shaft 2 while the driven member 4 rotates, and because of the linkage relationship between the shifting fork 45 and the sliding block 5a, when the driven member 4 rotates, the shifting fork 45 drives the sliding block 5a to drag the output shaft 2 to complete the rotation (the sliding block 5a in the dashed line frame in fig. 4 and the sliding block 5a on the left side thereof are mutual substitute members).
Example four
In the present embodiment, based on the third embodiment, two sets of conjugate cams 3a and 3b are provided, corresponding to the two sets of followers 4a and 4b, respectively. A rotary speed change mechanism of the present embodiment, referring to fig. 4, its main components include: the device comprises an input shaft 1, an output shaft 2, a conjugate cam I3 a, a conjugate cam II 3b, a driven member I4 a, a driven member II 4b, a sliding block 5a, a fixed seat 6, a shell 7 and a roller 8.
The matching relationship among the specific parts is as follows:
the shell 7 and the fixed seat 6 are used for assembling to form a support frame body of the whole mechanism, and the shell 7 is respectively provided with a shell central shaft hole 71, a connecting hole II 72, an oil filling hole 73, an oil drain hole 74 and an oil lens mounting hole 75; the fixing seat 6 is respectively provided with a fixing seat central shaft hole 61, a second mounting screw hole 62 and a first connecting hole 63, wherein the central lines of the fixing seat central shaft hole 61 and the shell central shaft hole 72 are on the same straight line. The first connecting hole 63 and the second connecting hole 72 are symmetrically arranged and fixedly connect the fixed seat 6 and the shell 7 together through the two holes.
The input shaft 1 provides initial rotating speed and torque, and structurally comprises an input shaft end and a linkage matching end, wherein the input shaft end penetrates through and is connected with a shell central shaft hole 61 rotating pair of the shell 7; the outer part of the shell 7 extends outwards to bear the external torque, and the inner part of the shell is fixedly connected with the linkage matching end; the linkage cooperation end is including being an organic whole structure and two disk bodies 12 that are parallel to each other, has seted up two sets of input shaft hole 11 at the both sides of two disk bodies 12 respectively the symmetry, and the axle center of two sets of input shaft hole 11 all is parallel with the axle center of input shaft, and two sets of input shaft hole 11 are used for rotating respectively and connect follower one 4a and follower two 4b that are located the input shaft both sides.
The first driven part 4a and the second driven part 4b are respectively arranged on two sides of the input shaft 1 and the output shaft 2, the structures of the first driven part 4a and the second driven part are the same, and the first driven part 4a comprises two first driven part rotating shafts 4a1, a first shifting fork 4a5 and two rollers 8; the first driven piece 4a is connected with the two input shaft holes 11 on one side of the input shaft 1 through two first driven piece rotating shafts 4a 1; thereby realizing the rotating fit relation between the input shaft 1 and the driven member 4 a. The second driven part 4b also comprises two driven part rotating shafts two 4b1, a second shifting fork 4b5 and two rollers 8; the driven part II 4b is connected with the two input shaft holes 11 at the other end of the input shaft 1 through two driven part rotating shafts II 4b1 in a rotating pair manner; thereby realizing the rotating fit relation between the input shaft 1 and the driven member 4 b.
The first driven part 4a and the second driven part 4b and the output shaft 2 realize linkage relation through a shifting fork structure, and the concrete structure is as follows: the first driven part 4a and the second driven part 4b are respectively provided with a first shifting fork 4a5 and a second shifting fork 4b5 with fork grooves, two sides of the output shaft 2 are respectively provided with a sliding block 5a through revolute pairs, the sliding blocks 5a on two sides of the output shaft 2 are respectively arranged in the corresponding fork grooves of the first shifting fork 4a5 and the second shifting fork 4b5, two sides of the sliding block 5a are in contact fit with the shifting forks, and the respective sliding blocks 5a are shifted through the first shifting fork 4a5 and the second shifting fork 4b5 to realize the drive control of the output shaft 2. The structure for pivotally mounting the slider 5a to the output shaft 2 is such that a slider mounting hole 5a1 provided in the slider 5a is connected to the output shaft hole 21 provided in the output shaft 2 via a revolute pair (the slider 5a and the slider 5a on the left side thereof in the dashed line frame in fig. 4 are mutually replaced members).
The conjugate cam I3 a and the conjugate cam II 3b are fixedly connected and have coincident rotation centers, and are provided with coaxial rotation center shaft holes 33 and mounting screw holes I34 formed in the end faces of the cam disc bodies; the two conjugate cams are fixedly arranged on the inner side of the fixed seat 6 through connecting the first mounting screw hole 34 with the second mounting screw hole 62 of the fixed seat 6; the rotating central shaft hole 33 is coaxial with the shaft center of the input shaft 1; the conjugate cam I3 a is composed of a cam plate I3 a1 and a cam plate II 3a2, and the conjugate cam II 3b is composed of a cam plate I3 b1 and a cam plate II 3b 2; the cam curved surfaces of the two conjugate cams are respectively conjugated and constrained with the two groups of rollers 8 arranged on the two driven pieces.
The output shaft 2 is used for outputting final rotating speed and torque, and structurally comprises an output shaft end and a linkage matching end, wherein the output shaft end penetrates through and is connected with a rotating pair of a fixed seat central shaft hole 61 of the fixed seat 6, extends outwards to the outside of the fixed seat 6 for outputting torque, and is inwards matched with the driven part 4 in a linkage manner; the output shaft 2 and the input shaft 1 are in rotational connection in an unconstrained relationship.
EXAMPLE five
The difference between this embodiment and the fourth embodiment is that one set of conjugate cams in the fourth embodiment is removed, and only one set of conjugate cams is retained to be in conjugate engagement with two sets of followers.
The utility model discloses a rotatory speed change mechanism has following structure advantage:
1. the relative rotation angle of the input shaft and the output shaft is connected and adjusted by a conjugate cam system.
2. The output shaft rotates at a variable speed when the input shaft rotates at a constant speed, namely the input shaft rotates at a constant speed for a circle, and the speed of the output shaft is constantly changed in the circle.
3. The speed change of the output shaft is the result of the constant speed rotation of the input shaft and the continuous adjustment of the relative angle of the input shaft and the output shaft by the conjugate cam system.
4. The device is used for driving the shedding device, can prolong the effective shedding time and make up the defect that the effective shedding time of the shedding device matched with a wide loom is insufficient.
On the basis of any of the above examples, the following modifications are made within the scope of the present patent:
the number of the followers 4 is increased;
the number of conjugate cams 3 is increased;
the transmission pattern of the driven part 4 and the output shaft 2 is changed or the shaft and hole patterns on each component are interchanged to form a hinge joint;
other components are added to realize the coaction of the rotary motion of the input shaft 1 and a conjugate cam system (comprising a conjugate cam 3 and a driven part 4), so that the rotary motion of the output shaft 2 is not synchronous with the rotary motion of the input shaft 1;
the foregoing are some preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept of the present invention, and these variations and modifications all fall into the protective scope of the present invention.
Claims (10)
1. A rotary speed change mechanism characterized by a structure comprising:
the device comprises a fixed seat used for providing support and an installation foundation for a component, a conjugate cam fixedly connected on the fixed seat, an input shaft used for providing initial rotating speed and torque, and an output shaft used for outputting final rotating speed and torque; and a follower, a conjugate engagement portion and a control arm disposed between the input shaft and the output shaft;
the driven part is used for transmitting torque from the input shaft, is connected with the input shaft through a first revolute pair, and the rotating axis of the first revolute pair is parallel to the axis of the input shaft;
the two conjugate engaging parts are integrally formed or arranged at preset positions of the driven part and respectively engaged with the two cam curved surfaces of the conjugate cam in a conjugate manner;
the control arm is linked between the driven part and the output shaft, one end of the control arm is rotatably connected with the driven part, and the other end of the control arm is rotatably connected with the output shaft and used for receiving the rotating torque of the driven part and transmitting the rotating torque to the output shaft.
2. A rotary speed change mechanism as claimed in claim 1, wherein:
the fixing seat is provided with a fixing seat central shaft hole, the conjugate cam is provided with a rotating central shaft hole, and the output shaft penetrates through the conjugate cam and is rotatably installed in the central shaft holes of the conjugate cam and the fixing seat.
3. A rotary speed change mechanism as claimed in claim 1, wherein:
the speed change mechanism further comprises a shell matched with the fixing seat, the shell is fixedly connected with the fixing seat, a shell central shaft hole is formed in the shell, and the input shaft penetrates through and is rotatably installed in the shell central shaft hole.
4. A rotary speed change mechanism as claimed in claim 1, wherein:
the input shaft and the output shaft are concentric and are connected through a revolute pair in an unconstrained relationship.
5. A rotary speed change mechanism as claimed in claim 1, wherein:
the input shaft comprises an input shaft end penetrating and extending to the outside of the shell and a linkage matching end positioned in the shell, the linkage matching end comprises two disk bodies which are in an integral structure or fixedly connected by multiple components and are parallel to each other, the two disk bodies are respectively provided with an input shaft hole, and the axes of the two input shaft holes are parallel to the axis of the input shaft; the follower is equipped with two follower pivots, the axle center coincidence of two follower pivots is just parallel with the axle center of input shaft, through two follower pivots and two input shaft holes, has constituted the normal running fit relation between input shaft and the follower, promptly revolute pair one.
6. A rotary speed change mechanism as claimed in claim 1, wherein:
the conjugate cam is formed by combining a first cam plate and a second cam plate, and cam curved surfaces of the first cam plate and the second cam plate are respectively conjugated and constrained with conjugate meshing parts on the driven part.
7. A rotary speed change mechanism as claimed in claim 1, wherein:
the conjugate engaging portion is designed as a part of the driven member or is fixed with the driven member by a separate member.
8. A rotary speed change mechanism as claimed in claim 7, wherein:
the structure form of the conjugate meshing part adopts two curved surface structures which form sliding friction with the curved surface of the conjugate cam, or adopts two roller structures which form rolling friction with the curved surface of the conjugate cam.
9. A rotary speed change mechanism as claimed in claim 1, wherein:
the control arm is used for establishing a force transmission and constraint relation between the driven part and the output shaft, and the implementation mode adopts a connecting rod structure or a shifting fork structure;
the connecting rod structure comprises a connecting rod, one end of the connecting rod is rotatably connected with the driven part, and the other end of the connecting rod is rotatably connected with the output shaft;
the shifting fork structure comprises a shifting fork arranged on the driven part and a sliding block arranged on the output shaft, and the sliding block is matched in a fork groove formed in the shifting fork.
10. A textile opening device, characterized by:
having a rotary speed change mechanism according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921379543.3U CN210826525U (en) | 2019-08-23 | 2019-08-23 | Rotary speed change mechanism and textile opening device with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921379543.3U CN210826525U (en) | 2019-08-23 | 2019-08-23 | Rotary speed change mechanism and textile opening device with same |
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| CN210826525U true CN210826525U (en) | 2020-06-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438621A (en) * | 2019-08-23 | 2019-11-12 | 江苏宋和宋智能科技有限公司 | A kind of rotary speed shifting mechanism and the weaving shedding motion with the mechanism |
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2019
- 2019-08-23 CN CN201921379543.3U patent/CN210826525U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110438621A (en) * | 2019-08-23 | 2019-11-12 | 江苏宋和宋智能科技有限公司 | A kind of rotary speed shifting mechanism and the weaving shedding motion with the mechanism |
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