CN102226465A - Winding device and double-thread driving mechanism thereof - Google Patents
Winding device and double-thread driving mechanism thereof Download PDFInfo
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- CN102226465A CN102226465A CN2011100839022A CN201110083902A CN102226465A CN 102226465 A CN102226465 A CN 102226465A CN 2011100839022 A CN2011100839022 A CN 2011100839022A CN 201110083902 A CN201110083902 A CN 201110083902A CN 102226465 A CN102226465 A CN 102226465A
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Abstract
The invention discloses a double-thread driving mechanism which comprises a reciprocating screw rod (1) and a shifting fork (2), wherein the end part of the reciprocating screw rod (1) is also provided with a reversing sleeve (3), and a reversing groove (4) is formed between a reversing surface (31) of the reversing sleeve (3) and a corresponding screw thread at the outermost side of the reciprocating screw rod (1); and the shifting fork (2) is also provided with a second guide part which is matched with the reversing surface (31) and breaks away from contacting with screw threads (12) of the reciprocating screw rod (1), so that a first arc guide part (21) of the shifting fork (2) is limited to enter a corresponding thread groove (11) at the outermost side of the reciprocating screw rod (1). Based on the structure design provided by the invention, guidance can be provided for the shifting fork (2) when the reversing groove (4) enters into the corresponding thread groove (11) at the outermost side, thus channeling and even dead block problems can be prevented; and in addition, the invention also discloses a winding device comprising the double-thread driving mechanism.
Description
Technical field
The present invention relates to move back and forth the driving mechanism technical field, particularly a kind of pair of screw drive mechanism.In addition, the invention still further relates to a kind of winding plant that comprises this pair screw drive mechanism.
Background technique
At present, can realize that the driving mechanism that moves back and forth mainly contains two screw drive mechanism, connecting rod slider driving mechanism, crank block driving mechanism and turbine and worm driving mechanism etc.These several driving mechanisms are compared, and the operating mode that two screw threads guiding driving mechanisms more are applicable to big load and little displacement can realize mechanical automatic guide and commutation, and safer and reliable, thereby is widely used in the elevator rope guide.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of the reciprocal screw mandrel of first kind of two screw drive mechanism in the prior art; Fig. 2 is the schematic representation that cooperates of reciprocal screw mandrel and shift fork among Fig. 1.
In the rope guide of elevator, when the diameter of wire rope or other ropes hour, back and forth screw mandrel 1 ' adjacent thread 1 ' 2 between pitch less, therefore cause the public intersection region 1 ' 3 between the opposite thread groove 1 ' 1 of reciprocal screw mandrel 1 ' last two directions long, at this moment, shift fork 2 shown in Figure 2 ' arcuate guide portion 2 ' 1 because too small along circumferential length, thereby shift fork 2 ' scurry the easily danger of groove.
Given this, for solving the above-mentioned groove problem of scurrying, second kind of two screw drive mechanism appearred in the prior art.Specifically please refer to Fig. 3 and Fig. 4, Fig. 3 is the structural representation of the shift fork of second kind of two screw drive mechanism in the prior art; Fig. 4 is the plane outspread drawing of second pair of screw drive mechanism in the prior art.
As shown in Figure 3, with shift fork 2 ' arcuate guide portion 2 ' 1 lengthening, make its length greater than the length of public intersection region 1 ' 3 among Fig. 1, thereby solved the problem of scurrying groove.But another problem of shift fork shown in Figure 32 ' thereupon produced.As shown in Figure 4, when shift fork 2 ' move to 4 ' time of commutation groove of reciprocal screw mandrel 1 ' end because shift fork 2 ' arcuate guide portion 2 ' 1 have bigger length, cause arcuate guide portion 2 ' 1 commutation groove 4 ' in reversing cover 3 ' interfere and stuck.
Given this, for solving above-mentioned stuck problem, the third pair screw drive mechanism has appearred in the prior art.Specifically please refer to Fig. 5 and Fig. 6, Fig. 5 is the plane outspread drawing of the third pair screw drive mechanism in the prior art; Fig. 6 is the plane outspread drawing of two screw drive mechanism under another kind of operating mode among Fig. 5.
As shown in Figure 5, with commutation groove 4 ' width widen, can so that arcuate guide portion 2 ' 1 can be smoothly by commutation groove 4 '.But this kind structure produces another new problem thereupon.As shown in Figure 6, when arcuate guide portion 2 ' 1 during by the corresponding outermost thread groove of commutation groove 4 ' enter 1 ' 1, because commutation groove 4 ' wider width, cause not guiding of arcuate guide portion 2 ' 1, thereby arcuate guide portion 2 ' 1 still can produce groove even the stuck problem of scurrying.
In view of this, how the third pair screw drive mechanism of the prior art is improved, thereby the guiding problem when solving shift fork and entering corresponding outermost thread groove by the commutation groove is the problem that those skilled in the art need solution badly.
Summary of the invention
The technical problem to be solved in the present invention is for providing a kind of pair of screw drive mechanism, and the structural design of the two screw drive mechanism of this kind can provide guiding for shift fork when entering corresponding outermost thread groove by the commutation groove, thereby prevents groove even the stuck problem of scurrying.In addition, another technical problem that will solve of the present invention is for providing a kind of winding plant that comprises above-mentioned pair of screw drive mechanism.
For solving the problems of the technologies described above, the invention provides a kind of pair of screw drive mechanism, comprise reciprocal screw mandrel and shift fork, described shift fork is provided with first arcuate guide portion of moving along the thread groove of described reciprocal screw mandrel; The end of described reciprocal screw mandrel also is provided with reversing cover, and is formed with between the commutation face of this reversing cover outermost screw thread corresponding with described reciprocal screw mandrel and is convenient to the commutation groove that described first arcuate guide portion commutation is passed through; Described shift fork also be provided with cooperate with described commutation face and with second guide portion that the screw thread of described reciprocal screw mandrel disengages can enter in the outermost thread groove of described reciprocal screw mandrel correspondence by described commutation groove so that limit described first arcuate guide portion.
Preferably, described second guide portion be second arcuate guide portion of the described first arcuate guide portion concentric, and the internal diameter of this second arcuate guide portion is greater than the external diameter of described reciprocal screw mandrel.
Preferably, described shift fork comprises footstalk portion, and described first arcuate guide portion is connected in this footstalk portion and is symmetrical arranged with respect to its axis; Described second arcuate guide portion further is connected in this footstalk portion and is symmetrical arranged with respect to its axis.
Preferably, described first arcuate guide portion is provided with interior guide surface; Described second arcuate guide portion protrudes from this interior guide surface, and the parallel outer guide surface of guide surface in being provided with and being somebody's turn to do; Described outer guide surface can be fitted with described commutation face when described first arcuate guide portion was located at described commutation groove.
Preferably, the both sides of described first arcuate guide portion are equipped with interior guide surface; The quantity of described second arcuate guide portion is two, and the two is symmetrically distributed in the both sides of described first arcuate guide portion; The outer guide surface of described second arcuate guide portion of described first arcuate guide portion, one side and the interior guide surface of the described first arcuate guide portion opposite side along described reciprocal screw axis to distance, equal the width of described commutation groove.
Preferably, described reversing cover and described reciprocal screw mandrel are for dividing body structure, and described reversing cover is fixedly connected on the circumference outside of described reciprocal screw mandrel end; The external diameter of described reversing cover is greater than the external diameter of described reciprocal screw mandrel, so that cooperate with described second arcuate guide portion.
Preferably, the inwall of described reversing cover further offers circular groove near an end of described reciprocal screw mandrel, and the internal diameter of this circular groove is greater than the external diameter of described first arcuate guide portion.
Preferably, the inwall of described reversing cover offers annulus portion away from an end of described reciprocal screw mandrel, and described reversing cover is fixedly connected on the end of described reciprocal screw mandrel by described annulus portion.
In addition, for solving the problems of the technologies described above, the present invention also provides a kind of winding plant, comprises reel, is wound with rope on the described reel; Described winding plant also comprises as above-mentioned each described pair of screw drive mechanism; Described shift fork is fixed with roller, and described rope is walked around described roller and is wound on the described reel.
On the basis of existing technology, the shift fork of provided by the present invention pair of screw drive mechanism also be provided with cooperate with described commutation face and with second guide portion that the screw thread of described reciprocal screw mandrel disengages can enter in the thread groove of described reciprocal screw mandrel correspondence by described commutation groove so that limit described first arcuate guide portion.When shift fork is in the commutation groove, thereby because second guide portion cooperates with commutation face shift fork is played leading role, thereby shift fork can successfully enter in the thread groove of correspondence by the groove that commutates, this thread groove is the outermost thread groove of reciprocal screw mandrel.When shift fork is not in the commutation groove, when still being in the thread groove of reciprocal screw mandrel, this moment, shift fork was moved along thread groove by first arcuate guide portion, owing to the screw thread of second guide portion with reciprocal screw mandrel disengages, thereby can the motion of first arcuate guide portion not impacted.
In sum, provided by the present invention pair of screw drive mechanism can provide guiding for shift fork when entering corresponding outermost thread groove by the commutation groove, thereby prevents groove even the stuck problem of scurrying.
In addition, the technique effect of winding plant provided by the present invention is identical with the technique effect of above-mentioned pair of screw drive mechanism, does not repeat them here.
Description of drawings
Fig. 1 is the structural representation of the reciprocal screw mandrel of first kind of two screw drive mechanism in the prior art;
Fig. 2 is the schematic representation that cooperates of reciprocal screw mandrel and shift fork among Fig. 1;
Fig. 3 is the structural representation of the shift fork of second kind of two screw drive mechanism in the prior art;
Fig. 4 is the plane outspread drawing of second pair of screw drive mechanism in the prior art;
Fig. 5 is the plane outspread drawing of the third pair screw drive mechanism in the prior art;
Fig. 6 is the plane outspread drawing of two screw drive mechanism under another kind of operating mode among Fig. 5;
Fig. 7 is the structural representation of two screw drive mechanism in an embodiment of the present invention;
Fig. 8 is the structural representation of the shift fork of two screw drive mechanism among Fig. 7;
Fig. 9 is the structural representation of the reversing cover of two screw drive mechanism among Fig. 7;
Figure 10 is the two plane outspread drawings of screw drive mechanism under first kind of operating mode among Fig. 7;
Figure 11 is the two plane outspread drawings of screw drive mechanism under second kind of operating mode among Fig. 7;
Figure 12 is the two plane outspread drawings of screw drive mechanism under the third operating mode among Fig. 7.
Figure 13 is the structural representation of winding plant in an embodiment of the present invention.
Wherein, the corresponding relation between reference character and the component names is among Fig. 1 to Fig. 6:
1 ' back and forth screw mandrel; 1 ' 1 thread groove; 1 ' 2 screw thread; 1 ' 3 public intersection region;
2 ' shift fork; 2 ' 1 arcuate guide portion; 3 ' reversing cover; 4 ' commutation groove.
Corresponding relation among Fig. 7 to Figure 13 between reference character and the component names is:
1 reciprocal screw mandrel; 11 thread grooves; 12 screw threads; 13 public intersection regions;
2 shift forks; 21 first arcuate guide portion; Guide surface in the 21a; 22 second arcuate guide portion; Guide surface; 23 footstalk portions;
3 reversing covers; 31 commutation faces; 32 circular grooves; 33 annulus portions;
4 commutation grooves; 5 reels; 6 ropes; 7 rollers.
Embodiment
Core of the present invention is for providing a kind of pair of screw drive mechanism, and the structural design of the two screw drive mechanism of this kind can provide guiding for shift fork when entering corresponding outermost thread groove by the commutation groove, thereby prevents groove even the stuck problem of scurrying.In addition, another core of the present invention is for providing a kind of winding plant that comprises above-mentioned pair of screw drive mechanism.
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 7, Fig. 8 and Fig. 9, Fig. 7 is the structural representation of two screw drive mechanism in an embodiment of the present invention; Fig. 8 is the structural representation of the shift fork of two screw drive mechanism among Fig. 7; Fig. 9 is the structural representation of the reversing cover of two screw drive mechanism among Fig. 7.
In an embodiment of the present invention, two screw drive mechanism comprise reciprocal screw mandrel 1 and shift fork 2, back and forth screw mandrel 1 is provided with two thread grooves 11 that direction is opposite, and first arcuate guide portion 21 of shift fork 2 can be along the opposite thread groove 11 of these two directions along forward rotation and backward rotation; As shown in Figure 7, back and forth the end of screw mandrel 1 also is provided with reversing cover 3, and be formed with commutation groove 4 between the corresponding outermost screw thread 12 of the commutation face 31 of this reversing cover 3 and reciprocal screw mandrel 1,4 pairs first arcuate guide portion 21 of this commutation groove play the commutation effect, make it by another thread groove 11 that thread groove 11 approach axis are opposite.
On the basis of above-mentioned prior art, shift fork 2 also is provided with second guide portion, this second guide portion cooperates with commutation face 31 and disengages with the screw thread 12 of reciprocal screw mandrel 1, thereby first arcuate guide portion 21 can be entered in the outermost thread groove 11 of reciprocal screw mandrel 1 correspondence by commutation groove 4 under the qualification of second guide portion.
When shift fork 2 is in the commutation groove 4, thereby because second guide portion cooperates with commutation face 31 shift fork 2 is played leading role, thereby shift fork 2 can be successfully enter in the corresponding thread groove 11 by commutation groove 4, and this thread groove 11 is reciprocal screw mandrel 1 outermost thread groove 11.When shift fork 2 is not in the commutation groove 4, when still being in the thread groove 11 of reciprocal screw mandrel 1, this moment, shift fork 2 was moved along thread groove 11 by first arcuate guide portion 21, because this moment, second guide portion disengaged with the screw thread 12 of reciprocal screw mandrel 1, thereby can the motion of first arcuate guide portion 21 not impacted.
In sum, provided by the present invention pair of screw drive mechanism can provide guiding for shift fork 2 when entering corresponding outermost thread groove 11 by commutation groove 4, thereby prevents groove even the stuck problem of scurrying.
Need to prove; technique scheme does not impose any restrictions for the structure of second guide portion; the guide portion of any structure, as long as the arcuate guide portion 21 of winning is entered in the corresponding outermost thread groove 11 by commutation groove 4 smoothly, just all should be within protection scope of the present invention.
Certainly, can specifically set a kind of structure of second guide portion.Such as, as shown in Figure 8, described second guide portion is second arcuate guide portion 22, and this second arcuate guide portion 22 and first arcuate guide portion, 21 concentrics, and the internal diameter of this second arcuate guide portion 22 is greater than the external diameter of reciprocal screw mandrel 1.
Need to prove that put off until some time later in the epimere, back and forth the external diameter of screw mandrel 1 specifically is meant the external diameter of screw thread 12 on the reciprocal screw mandrel 1, is not the external diameter of the thread groove 11 of formation between two screw threads 12.Because the internal diameter of this second arcuate guide portion 22 is greater than the external diameter of the screw thread 12 of reciprocal screw mandrel 1, thereby when first arcuate guide portion 21 is moved in thread groove 11, second arcuate guide portion 22 disengages with the screw thread 12 of reciprocal screw mandrel 1 all the time, thereby can not have any impact to the circumferential rotation in the edge of shift fork 2.
As shown in Figure 8, in technique scheme, shift fork 2 comprises that footstalk portion 23, the first arcuate guide portion 21 are connected in this footstalk portion 23 and are symmetrical arranged with respect to its axis; On this basis, can make further design to second arcuate guide portion 22.Such as, also can be so that second arcuate guide portion 22 is connected in this footstalk portion 23, and make second arcuate guide portion 22 be symmetrical arranged with respect to the axis of this footstalk portion 23.This kind structural design can be so that the processing of second arcuate guide portion 22, and make structure become simple.
On the basis of above-mentioned any technological scheme, can also make further improvement.
Such as, as shown in Figure 8, first arcuate guide portion 21 is provided with interior guide surface 21a, and the both sides of this first arcuate guide portion 21 are equipped with interior guide surface 21a; Second arcuate guide portion 22 protrudes from guide surface 21a in this, and be provided with should interior parallel outer guide surface 22a of guide surface 21a, and the quantity of second arcuate guide portion 22 is two, and is symmetrically set in the both sides of first arcuate guide portion 21 respectively; What need emphatically point out is, the interior guide surface 21a of the outer guide surface 22a of second arcuate guide portion 22 of first arcuate guide portion, 21 1 sides and first arcuate guide portion, 21 opposite sides equals or be slightly less than the width of commutation groove 4 along the axial distance of reciprocal screw mandrel 1.
As shown in Figure 7, when first arcuate guide portion 21 is arranged in commutation groove 4, because the interior guide surface 21a of the outer guide surface 22a of second arcuate guide portion 22 of first arcuate guide portion, 21 1 sides and first arcuate guide portion, 21 opposite sides along the axial distance of reciprocal screw mandrel 1, equals or is slightly less than the width of the groove 4 that commutates; Thereby the outer guide surface 22a of second arcuate guide portion 22 of first arcuate guide portion, 21 1 sides limits guiding by commutation face 31, at opposite side, the interior guide surface 21a of first arcuate guide portion 21 limits guiding by the sidewall of reciprocal screw mandrel 1 outermost screw thread 12, thereby first arcuate guide portion 21 can successfully be entered in the corresponding outermost thread groove 11 by commutation groove 4.
In addition, in technique scheme, can also make specific design to the structure of reversing cover 3.Such as, as shown in Figure 9, reversing cover 3 is with back and forth screw mandrel 1 is for dividing body structure, and reversing cover 3 is fixedly connected on the circumference outside of reciprocal screw mandrel 1 end; And of paramount importance is that the external diameter of this reversing cover 3 need be greater than the external diameter of reciprocal screw mandrel 1.
As shown in Figure 7, because the internal diameter of second arcuate guide portion 22 is greater than the external diameter of reciprocal screw mandrel 1, if thereby make second arcuate guide portion 22 and the commutation face 31 of reversing cover 3 fit, thereby guiding is provided, external diameter that then must reversing cover 3 need be greater than the reciprocal external diameter of screw mandrel 1.
Further, as shown in Figure 9, the inwall of reversing cover 3 further offers circular groove 32, and this circular groove 32 is opened in the end near reciprocal screw mandrel 1, and the internal diameter of this circular groove 32 is greater than the external diameter of first arcuate guide portion 21.
As shown in Figure 11 hereinafter, when first arcuate guide portion 21 commutates in commutation groove 4, because reversing cover 3 is provided with circular groove 32, and the internal diameter of this circular groove 32 is greater than the external diameter of first arcuate guide portion 21, thereby first arcuate guide portion 21 can stretch in this circular groove 32, thereby can prevent further that first arcuate guide portion 21 and reversing cover 3 from interfering.
Owing to be provided with circular groove 32 in the reversing cover 3, and the internal diameter of this circular groove 32 is greater than the external diameter of first arcuate guide portion 21, thereby this kind structural design is equivalent on the intrinsic width basis of commutation groove 4 itself, further increased the width of a circular groove 32, thereby can prevent further that first arcuate guide portion 21 from interfering with reversing cover 3.Thereby the less commutation groove 4 of natural width shown in Figure 3 own ' in, if reversing cover 3 ' also be provided with this moment circular groove shown in Figure 9 (internal diameter of this circular groove need greater than shift fork 4 ' the external diameter of arcuate guide portion 2 ' 1), and this circular groove has enough width, thereby also prevent shift fork 2 ' with reversing cover 3 ' interfere, thereby realize commutation.
In addition, as shown in Figure 9, the inwall of reversing cover 3 offers annulus portion 33 away from an end of reciprocal screw mandrel 1, and reversing cover 3 is fixedly connected on the end of reciprocal screw mandrel 1 by annulus portion 33.
Below will specifically introduce the concrete working procedure of provided by the present invention pair of screw drive mechanism under three kinds of operating modes.Please refer to Figure 10, Figure 11 and Figure 12, Figure 10 is the two plane outspread drawings of screw drive mechanism under first kind of operating mode among Fig. 7; Figure 11 is the two plane outspread drawings of screw drive mechanism under second kind of operating mode among Fig. 7; Figure 12 is the two plane outspread drawings of screw drive mechanism under the third operating mode among Fig. 7.
As shown in figure 10, in first kind of operating mode, when moving in the thread groove 11 of shift fork 2 at reciprocal screw mandrel 1, this moment since the circumferential length in the edge of first arcuate guide portion 21 greater than the length of public intersection region 13, thereby first arcuate guide portion 21 can be passed through this public intersection region 13 smoothly.Simultaneously, because the internal diameter of second arcuate guide portion 22 is greater than the reciprocal external diameter of the screw thread 12 of screw mandrel 1, thereby second arcuate guide portion 22 can not impact the motion of first arcuate guide portion 21.
As shown in figure 11, in second kind of operating mode, owing to have micro-gap between the outer guide surface 22a of second arcuate guide portion 22 and the commutation face 31, and second arcuate guide portion 22 can carry out the chamfering setting, thereby second arcuate guide portion 22 can comparatively waltz through commutation position.
As shown in figure 12, in the third operating mode, when first arcuate guide portion 21 enters corresponding outermost thread groove 11 by commutation groove 4, because the interior guide surface 21a of the outer guide surface 22a of second arcuate guide portion 22 of first arcuate guide portion, 21 1 sides and first arcuate guide portion, 21 opposite sides along the axial distance of reciprocal screw mandrel 1, equals or is slightly less than the width of the groove 4 that commutates; Thereby the outer guide surface 22a of second arcuate guide portion 22 of first arcuate guide portion, 21 1 sides limits guiding by commutation face 31, at opposite side, the interior guide surface 21a of first arcuate guide portion 21 limits guiding by the sidewall of reciprocal screw mandrel 1 outermost screw thread 12, thereby first arcuate guide portion 21 can successfully be entered in the corresponding outermost thread groove 11 by commutation groove 4.
In addition, the present invention also provides a kind of winding plant, specifically please refer to Figure 13, and Figure 13 is the structural representation of winding plant in an embodiment of the present invention.
As shown in figure 13, winding plant provided by the present invention comprises reel 5, is wound with rope 6 on the reel 5, and this rope 6 can be the rope of wire rope, hydralic hose or other types; On this basis, described winding plant also comprises the two screw drive mechanism in above-mentioned any technological scheme; Shift fork 2 is fixed with roller 7, and rope 6 is walked around roller 7 and is wound on the reel 5.Other parts of described winding plant can be with reference to prior art, and this paper no longer launches.
More than winding plant provided by the present invention and two screw drive mechanism thereof are described in detail.Used specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (9)
1. a two screw drive mechanism comprises reciprocal screw mandrel (1) and shift fork (2), and described shift fork (2) is provided with along first arcuate guide portion (21) of thread groove (11) motion of described reciprocal screw mandrel (1); The end of described reciprocal screw mandrel (1) also is provided with reversing cover (3), and is formed with between the commutation face (31) of this reversing cover (3) the outermost screw thread (12) corresponding with described reciprocal screw mandrel (1) and is convenient to the commutation groove (4) that described first arcuate guide portion (21) commutation is passed through; It is characterized in that, described shift fork (2) also be provided with cooperate with described commutation face (31) and with second guide portion that the screw thread (12) of described reciprocal screw mandrel (1) disengages can enter in the corresponding outermost thread groove (11) of described reciprocal screw mandrel (1) by described commutation groove (4) so that limit described first arcuate guide portion (21).
2. pair screw drive mechanism as claimed in claim 1, it is characterized in that, described second guide portion be second arcuate guide portion (22) of described first arcuate guide portion (21) concentric, and the internal diameter of this second arcuate guide portion (22) is greater than the external diameter of described reciprocal screw mandrel (1).
3. pair screw drive mechanism as claimed in claim 2 is characterized in that, described shift fork (2) comprises footstalk portion (23), and described first arcuate guide portion (21) is connected in this footstalk portion (23) and is symmetrical arranged with respect to its axis; Described second arcuate guide portion (22) further is connected in this footstalk portion (23) and is symmetrical arranged with respect to its axis.
4. as claim 2 or 3 described pairs of screw drive mechanism, it is characterized in that described first arcuate guide portion (21) is provided with interior guide surface (21a); Described second arcuate guide portion (22) protrudes from this interior guide surface (21a), and the parallel outer guide surface (22a) of guide surface (21a) in being provided with and being somebody's turn to do; Described outer guide surface (22a) can be fitted with described commutation face (31) when described first arcuate guide portion (21) was located at described commutation groove (4).
5. pair screw drive mechanism as claimed in claim 4 is characterized in that, the both sides of described first arcuate guide portion (21) are equipped with interior guide surface (21a); The quantity of described second arcuate guide portion (22) is two, and the two is symmetrically distributed in the both sides of described first arcuate guide portion (21); The outer guide surface (22a) of described second arcuate guide portion (22) of described first arcuate guide portion (21) one sides and the interior guide surface (21a) of described first arcuate guide portion (21) opposite side equal the width of described commutation groove (4) along the axial distance of described reciprocal screw mandrel (1).
6. as each described pair of screw drive mechanism of claim 2 to 5, it is characterized in that described reversing cover (3) is the branch body structure with described reciprocal screw mandrel (1), described reversing cover (3) is fixedly connected on the circumference outside of described reciprocal screw mandrel (1) end; The external diameter of described reversing cover (3) is greater than the external diameter of described reciprocal screw mandrel (1), so that cooperate with described second arcuate guide portion (22).
7. pair screw drive mechanism as claimed in claim 6, it is characterized in that, the inwall of described reversing cover (3) further offers circular groove (32) near an end of described reciprocal screw mandrel (1), and the internal diameter of this circular groove (32) is greater than the external diameter of described first arcuate guide portion (21).
8. pair screw drive mechanism as claimed in claim 7, it is characterized in that, the inwall of described reversing cover (3) offers annulus portion (33) away from an end of described reciprocal screw mandrel (1), and described reversing cover (3) is fixedly connected on the end of described reciprocal screw mandrel (1) by described annulus portion (33).
9. a winding plant comprises reel (5), is wound with rope (6) on the described reel (5); It is characterized in that described winding plant also comprises as each described pair of screw drive mechanism of claim 1 to 8; Described shift fork (2) is fixed with roller (7), and described rope (6) is walked around described roller (7) and is wound on the described reel (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100839022A CN102226465A (en) | 2011-04-02 | 2011-04-02 | Winding device and double-thread driving mechanism thereof |
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| CN2011100839022A CN102226465A (en) | 2011-04-02 | 2011-04-02 | Winding device and double-thread driving mechanism thereof |
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| CN103274260B (en) * | 2013-05-31 | 2016-08-10 | 深圳市隆瑞科技有限公司 | A kind of racker and the reciprocating screw rod of racker |
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| CN105065595A (en) * | 2015-07-14 | 2015-11-18 | 赵云鹏 | Transmission assembly, transmission mechanism, transmission device and power transmission equipment |
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| CN107769450B (en) * | 2017-11-21 | 2024-01-26 | 湖北科技学院 | Double-thread type reciprocating motor |
| CN108972167A (en) * | 2018-09-03 | 2018-12-11 | 山东理工大学 | A kind of ensilage machine self-sharpening blade device |
| CN108972167B (en) * | 2018-09-03 | 2020-09-04 | 山东理工大学 | Self-sharpening device for silage harvester |
| CN108980291A (en) * | 2018-09-06 | 2018-12-11 | 江苏品德机电科技有限公司 | A kind of high-mechanic type ball-screw nut transmission device |
| CN111765208A (en) * | 2020-07-20 | 2020-10-13 | 汪培洋 | Worm gear and worm transmission device capable of rotating in two directions |
| CN113071561A (en) * | 2021-03-24 | 2021-07-06 | 浙江合众新能源汽车有限公司 | Steering wheel steering indication identification visual system |
| CN113071561B (en) * | 2021-03-24 | 2022-07-05 | 浙江合众新能源汽车有限公司 | Steering wheel steering indication identification visual system |
| CN115010027A (en) * | 2022-05-25 | 2022-09-06 | 广东冠能电力科技发展有限公司 | Self-lifting wire take-up and pay-off device |
| CN116040516A (en) * | 2022-11-16 | 2023-05-02 | 德州松美建筑工程有限公司 | Hoist |
| CN116040516B (en) * | 2022-11-16 | 2024-05-28 | 德州松美建筑工程有限公司 | Hoist |
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Application publication date: 20111026 |