CN102587667A - Arm support structure, arm support device and concrete pump truck - Google Patents
Arm support structure, arm support device and concrete pump truck Download PDFInfo
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- CN102587667A CN102587667A CN2012100575071A CN201210057507A CN102587667A CN 102587667 A CN102587667 A CN 102587667A CN 2012100575071 A CN2012100575071 A CN 2012100575071A CN 201210057507 A CN201210057507 A CN 201210057507A CN 102587667 A CN102587667 A CN 102587667A
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Abstract
The invention provides an arm support structure, which comprises a first arm section and a second arm section, wherein the first arm section and the second arm section are connected by a spindle; a hinged axis of the spindle and the end part of the arm support structure is vertically arranged; a driving device and a first driving wheel are installed on the first arm section; a second driving wheel can be rotatably installed on the spindle; the second arm section and the second driving wheel are fixedly connected; each of the first driving wheel and the second driving wheel is respectively provided with a driving mechanism; the driving device drives the first driving wheel to rotate; and the first driving wheel drives the second driving wheel and the second arm section to rotate around the spindle by the driving mechanism. The invention also provides an arm support device and a concrete pump truck. According to the technical scheme provided by the invention, a function that the arm support horizontally rotates is realized, and the cloth flexibility is increased.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, the concrete mixer that relates to a kind of jib structure, has the boom device of this jib structure and have this boom device.
Background technology
At present, concrete mixer generally comprises running gear, pumping installations and boom device.Running gear is mainly used in the transfer of concrete pumping equipment in the work-yard, and pumping installations and boom device are mainly used in needing concrete place in transmission and concrete transmission to the work progress.
Boom device comprises the jib that more piece is hinged successively, mainly in perpendicular, rotates between adjacent two jibs, can not realize horizontally rotating; If will horizontally rotate, can only rotate through rotary motor and reductor driving rotational bearing, rotate to drive turntable, thereby realize horizontally rotating of boom device.Because boom device own vol and weight are very big, this to horizontally rotate its inertia of mode bigger, not only improved pump truck work energy consumption, and to adverse effect is also arranged in application life of whole jib.
In the existing boom device, the relative motion between all jibs only limits to the rotation in the perpendicular, makes the movement locus of jib be restricted like this, influences the cloth flexibility of concrete mixer, has the cloth dead point, influences efficiency of construction.
Summary of the invention
In order to solve the problems referred to above of prior art, first purpose of the present invention is to provide a kind of jib structure, and this jib structure can be realized horizontally rotating, thereby improves the cloth flexibility.The invention allows for a kind of boom device that comprises above-mentioned jib structure, and the concrete mixer of using this boom device.
In order to realize first purpose of the present invention; The invention provides a kind of jib structure; Comprise the first arm section and the second arm section that connect through rotating shaft; Said rotating shaft is provided with the hinge axes of this jib structure end is vertical, and the drive unit and first drive are installed on said the first arm section, and second drive is rotatably installed on said rotating shaft; The said second arm section is fixedly connected with said second drive; On said first drive and said second drive, transmission mechanism is installed, said drive unit drives said first drive and rotates, and said first drive drives said second drive through said transmission mechanism and the said second arm section is rotated around said rotating shaft.
Be used to connect the rotating shaft of the first arm section and the second arm section among the present invention; Be provided with the hinge axes of this jib structure end is vertical; Through two drives and the transmission mechanism that is used for carry-over moment, can drive the second arm section and in horizontal plane, rotate with respect to the first arm section.Therefore; This jib structure can rotate in perpendicular around the jointed shaft of its end on the one hand; And its second arm section can be around the shaft rotated with respect to the first arm section in horizontal plane, thereby the cloth flexibility that has improved jib has avoided driving in the prior art the whole boom device existing technological deficiency that horizontally rotates; Its flexibility that horizontally rotates operation is stronger, and energy consumption is less.
In technique scheme; Preferably; Said transmission mechanism is a wire rope, and said wire rope is stretched on said first drive and said second drive, and can drive said second drive and the said second arm section is rotated in-90 °～90 ° angular ranges around said rotating shaft.Wire rope has greatly increased drive unit and the drive degree of freedom in space layout as transmission mechanism; Wire rope also has very high tensile strength simultaneously; Can satisfy jib and in horizontally rotating process, act on the reaction force on the wire rope; Guarantee job safety, the second arm section is rotated in-90 °～90 ° angular ranges around the shaft can satisfy the cloth degree of freedom of jib routine work, thereby has improved the cloth flexibility of jib.
In technique scheme, preferably, said wire rope is fixed on said first drive through first locked point, is fixed on said second drive through second locked point.Because the smooth surface of drive; And the frictional force between the wire rope is less, in carrying out transmission process, skidding accident possibly take place, and wire rope is separately fixed on two drives through locked point; The situation of having avoided wire rope to skid takes place, and guarantees that wire rope stably carries out transmission.In concrete design process, steel cable can be set, two wire rope also can be set, the two ends of two wire rope are fixed on two drives through two locked points respectively.
In technique scheme; Preferably, said first drive is identical with the external diameter of said second drive, under original state; Distance between said first locked point and said second locked point is S=L+2R; Wherein, L is the center to center distance between first drive and second drive, and R is the radius of first drive.Under the original state; The first arm section and the second arm section are on the straight line; Be that jib structure does not horizontally rotate, when first drive rotated counterclockwise 90 °, first locked point moved to the first drive minimum point by initial bit; Second locked point moves to the second drive peak by initial bit simultaneously, realizes the rotation of the second arm section in 0～90 ° of scope; When first drive clockwise rotated 90 °, first locked point was back to initial bit, and second locked point is back to initial bit; When first drive clockwise rotates 90 ° by initial bit; First locked point moves to the first drive peak by initial bit; Second locked point is driven the minimum point that is moved to second drive by initial bit simultaneously, realizes the rotation of the second arm section in 0～-90 ° of scope.
In technique scheme; Preferably; Said transmission mechanism is a wire rope, and said wire rope is stretched on said first drive and said second drive, and can drive said second drive and the said second arm section is rotated in-180 °～180 angular ranges around said rotating shaft.Wire rope has greatly increased drive unit and the drive degree of freedom in space layout as transmission mechanism; Wire rope also has very high tensile strength simultaneously; Can satisfy jib and in horizontally rotating process, act on the reaction force on the wire rope; Guarantee production safety, the second arm section is rotated the cloth freedom that can satisfy jib full angle in horizontal plane around the shaft in-180 °～180 ° angular ranges, has saved fully and has driven the mode that whole boom device horizontally rotates in the prior art; Save energy consumption, reduce production safety hidden danger.
In technique scheme; Preferably; Said wire rope comprises that said first wire rope is parallel with said second wire rope by first wire rope and second wire rope of said first drive and the said second drive tensioning: said first wire rope can drive said second drive and the said second arm section is rotated in 0～-180 ° of scope around said rotating shaft by initial position; Said second wire rope can drive said second drive and the said second arm section is rotated in 0～180 ° of scope around said rotating shaft by initial position.Like this, under the identical or different situation of the external diameter of first drive and second drive, can satisfy the second arm section and in horizontal plane, rotate in-180 °～180 ° angular ranges around the shaft.
In technique scheme; Preferably; Under original state: the length that said first wire rope is wound on said second drive is not less than the half the of the said second drive girth, and the length that said first wire rope is wound on said first drive is not less than the half the of the said second drive girth; The length that said second wire rope is wound on said second drive is not less than the half the of the said second drive girth, and the length that said second wire rope is wound on said first drive is not less than the half the of the said second drive girth.Like this, under the identical or different situation of the external diameter of first drive and second drive, still can satisfy the second arm section and in horizontal plane, rotate in-180 °～180 ° angular ranges around the shaft.
In technique scheme, preferably, said transmission mechanism is a chain, and said first drive and said second drive are respectively first sprocket wheel and second sprocket wheel, and said transmission mechanism is set in said first sprocket wheel and said second sprocket wheel.Adopt the kind of drive of chain sprocket, avoided the situation of skidding in the wire rope transmission to take place, also just avoided wire rope being fixed on the operation on the drive simultaneously, operate simplyr, guarantee that the safety of production is carried out smoothly through locked point.
The present invention also provides a kind of boom device, comprises the joint arm that more piece is hinged successively, and at least one joint joint arm is described jib structure.Like this, boom device just can possess the function that in horizontal plane, swings, and avoids the use of the horizontal level that turntable is regulated jib, increases the cloth degree of freedom of boom device and pump truck.
The present invention also provides a kind of concrete mixer, comprises above-mentioned boom device.
Through jib structure provided by the invention, boom device and concrete mixer, this jib structure can rotate in perpendicular around the jointed shaft of its end on the one hand, and can in horizontal plane, rotate around above-mentioned rotating shaft, thus the cloth flexibility that has improved jib; Adopt wire rope to carry out transmission among the present invention, drive unit and drive have bigger degree of freedom on space layout, increased the flexibility of jib general arrangement greatly; The realization of jib action does not need connecting rod, has alleviated the load of drive unit; When not needing jib to do to horizontally rotate, wire rope can lock horizontally rotating of jib, and boom device provided by the invention can satisfy the functional requirement of existing jib fully.
Description of drawings
Fig. 1 is the structural representation of boom device one embodiment of the concrete mixer according to the present invention;
Fig. 2 is the enlarged drawing of A portion among Fig. 1;
Fig. 3 is the structural representation of jib structure one embodiment according to the present invention;
Fig. 4 A is a jib structure original state sketch map shown in Figure 3;
Fig. 4 B be among Fig. 3 the second arm section by the original state structural representation after 90 ° that turns clockwise;
Fig. 4 C is that the second arm section is rotated counterclockwise the structural representation after 90 ° by original state among Fig. 3;
Fig. 5 is the structural representation of the another embodiment of jib structure according to the present invention;
Fig. 5 A, Fig. 5 B are the sketch mapes that structure shown in Figure 5 is in original state;
Fig. 6 A, Fig. 6 B are that the second arm section is rotated counterclockwise the sketch map after 180 ° by original state among Fig. 5;
Fig. 7 A, Fig. 7 B are the jib structure original state sketch map of an embodiment again according to the present invention;
Fig. 8 A, Fig. 8 B are the second arm sections shown in Fig. 7 A, Fig. 7 B by turn clockwise 180 ° structural representation of original state;
Fig. 9 is the structural representation of jib structure the 4th embodiment according to the present invention.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1 to Fig. 9:
1 rotating shaft, 2 the first arm sections, 3 second arm sections, 4 motor
5 first drives, 6 wire rope, 60 groovings
61 first wire rope, 62 second wire rope, 7 second drives
8 reductors, 11 through holes
100 first segment arms, 200 second joint arms 300 the 3rd joint arm
400 the 4th joint arms 500 the 5th joint arm, 600 turntables
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Set forth a lot of details in the following description so that make much of the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following disclosed specific embodiment.
Extremely shown in Figure 3 like Fig. 1; The invention provides a kind of boom device; Comprise the hinged successively joint arm of more piece five joints, it is hinged successively that first segment arm 100, the second joint arm the 200, the 3rd save arm 300, the 4th joint arm 400 and the 5th saves arm 500, and wherein the butt of first segment arm 100 is hinged on the turntable 600; The other end is hinged with the second joint arm the 200, the 3rd successively and saves arm 300, the 4th joint arm 400 and the 5th joint arm 500, and at least the four joint arm is a jib structure shown in Figure 3.
This jib structure comprises the first arm section 2 and the second arm section 3 that connects through rotating shaft 1; Rotating shaft 1 is provided with the hinge axes of this jib structure end is vertical; The drive unit and first drive 5 are installed on the first arm section 2; Second drive 7 is rotatably installed on rotating shaft 1, the second arm section 3 and is fixedly connected with second drive 7, on first drive 5 and second drive 7, transmission mechanism is installed; Drive unit drives first drive 5 and rotates, and first drive 5 drives second drive 7 through transmission mechanism and the second arm section 31 is rotated around the shaft.
Because rotating shaft 1 is provided with the hinge axes of this jib structure end is vertical; This jib structure can rotate in perpendicular around the jointed shaft of its end on the one hand; And its second arm section 3 can be around the shaft 1 be rotated with respect to the first arm section 2 in horizontal plane, thereby the cloth flexibility that has improved jib has avoided driving in the prior art the whole boom device existing technological deficiency that horizontally rotates; Its flexibility that horizontally rotates operation is stronger, and energy consumption is less.
In actual application, transmission mechanism is a wire rope 6, and wire rope 6 is stretched on first drive 5 and second drive 7, and can drive second drive 7 and the second arm section 31 is rotated in-90 °～90 ° angular ranges around the shaft.
Said first drive 5 and said second drive 7 circumferentially be provided with the gathering sill 60 that holds said wire rope 6.Gathering sill 60 can make wire rope carry out transmission more reposefully, guarantees the safety of jib operation.
Said drive unit can be a motor 4, can also be motor or hydraulic cylinder.Also be provided with reductor 8 between said motor 4 and said first drive 5, the power of said motor 4 is passed to said first drive 5 after slowing down through reductor 8.Reductor can play the effect that reduces rotating speed, increases moment of torsion, makes the drive 5 of winning obtain bigger driving force, drives second drive 7 and the second arm section and 1 rotates around the shaft.
Said rotating shaft 1 offers along its axially extended through hole 11, in the said through hole 11 the carrier pipe (not shown) can be installed.Like this, be convenient to the layout of carrier pipe on jib structure, save the space.
Shown in Fig. 4 A, Fig. 4 B, Fig. 4 C, on second drive 7, twine wire rope 6 at first drive 5, and wire rope 6 is fixed on first drive 5 through the first locked point A, be fixed on second drive 7 through the second locked point B.Because the smooth surface of drive; And the frictional force between the wire rope is less, in carrying out transmission process, skidding accident possibly take place, and wire rope is separately fixed on two drives through locked point; The situation of having avoided wire rope to skid takes place, and guarantees that wire rope stably carries out transmission.
Shown in Fig. 4 A, for shown in the initial position sketch map of jib structure.First drive 5 is identical with the external diameter of second drive 7, and under original state, this moment, the first arm section 2 and the second arm section 3 of this jib structure were horizontally disposed with; Distance between the first locked point A and the second locked point B is S=L+2R; Wherein, L is the center to center distance between first drive 5 and second drive 7, and R is that the radius of first drive 5 is (because the external diameter of first drive 5 is identical with the external diameter of second drive 7; At this moment, R also represents the external diameter of second drive 7).
Shown in Fig. 4 B, the second arm section 3 is by the original state structural representation after 90 ° that turns clockwise.At this moment; The first locked point A was turned clockwise for 1/4 week by initial position, moved to the position shown in Fig. 4 B, and the second locked point B clockwise rotated for 1/4 week by initial position; Move to the position shown in Fig. 4 B; In this process, first drive 5 drives second drives 7 through wire rope 6 and the second arm section 31 has turned clockwise 90 ° around the shaft, promptly realized the second arm section 3 in horizontal plane the rotation in 0～-90 ° of scope (the definition initial position is a zero degree; Clockwise turn to negative angle, be rotated counterclockwise be positive-angle).
Shown in Fig. 4 C, the second arm section 3 is rotated counterclockwise the structural representation after 90 ° by original state.At this moment; The first locked point A rotated counterclockwise for 1/4 week by initial position, moved to the position shown in Fig. 4 C, and the second locked point B rotated counterclockwise for 1/4 week by initial position; Move to the position shown in Fig. 4 C; In this process, first drive 5 drives second drives 7 through wire rope 6 and the second arm section 31 has been rotated counterclockwise 90 ° around the shaft, has promptly realized the rotation in 0～90 ° of scope in horizontal plane of the second arm section 3.
The jib structure that provides through Fig. 3; Wire rope has greatly increased drive unit and the transmission device degree of freedom in space layout as transmission mechanism; Wire rope also has very high tensile strength simultaneously, can satisfy jib and in horizontally rotating process, act on the reaction force on the wire rope, guarantees production safety; The second arm section is rotated the cloth degree of freedom can satisfy the jib routine work around the shaft in-90 °～90 ° angular ranges, avoid driving capstan head and drive jib and horizontally rotate.
Realizing that jib in the rotating process, can only be provided with steel cable in-90 °～90 ° angular ranges, of top embodiment.Certainly, two wire rope can be set also, the two ends of two wire rope are fixed on two drives through two locked points respectively.
Shown in Fig. 4 A, it is also understood that be first locked point A's and the second locked point B between be provided with two sections wire rope, one section wire rope is connected the first locked point A and the second locked point B by the top of first drive 5 and the top of second drive 7; Another section wire rope is connected the first locked point A and the second locked point B by the bottom of first drive 5 and the bottom of second drive 7, and two sections wire rope are symmetrical set up and down, play the effect of transferring power between first drive 5 and second drive 7 jointly.
Those skilled in the art it should also be understood that; In the structure shown in Fig. 4 A; Because one whole wire rope is separately fixed on first drive 5 and second drive 7 through the first locked point A and the second locked point B; Also be separately fixed at the first locked point A and the second locked point B with regard to the two ends that are equivalent to two wire rope, the employing steel cable is set on first drive 5 and second drive 7 and two wire rope of employing are separately fixed at the first locked point A and the second locked point B has equal technique effect.
In addition; Wire rope described in the foregoing description realizes that through two fixed points jib rotates in-90 °～90 ° angular ranges; And be not used in and limit the extreme position that jib can only turn to-90 ° or 90 °; But in order to show the rotating scope of jib; Can drive second jib and be rotated counterclockwise 30 °, 40 °, 45 °, 60 ° or 75 ° of equal angles through first drive 5, wire rope 6, second drive 7 like motor, also can be through driven by motor second jib turn clockwise 30 °, 40 °, 45 °, 60 ° or 75 ° of equal angles, the angle of jib rotation can be confirmed by the angular displacement that motor rotates.Because wire rope is fixed on the corresponding drive through locked point, need control the output of motor, with avoid drive rotate greater than under 90 ° the situation to the damage of locked point structure, improve stability and reliability that jib structure horizontally rotates.Preferably, motor can be selected servomotor.
In the another specific embodiment of the present invention; Shown in Fig. 5 to Fig. 6 B; Transmission mechanism is a wire rope 6, and wire rope 6 is stretched on first drive 5 and second drive 7, and can drive second drive 7 and the second arm section 31 is rotated in-180 °～180 angular ranges around the shaft.To rotate in above-mentioned-180 °～180 angular ranges in order realizing, on first drive 5 and second drive 7, to be wound with the twice wire rope.
Said wire rope 6 comprises that said first wire rope 61 is parallel with said second wire rope 62 by first wire rope 61 and second wire rope 62 of said first drive 5 and 7 tensionings of said second drive: said first wire rope 61 can drive said second drive 7 and the said second arm section 3 is rotated in 0～-180 ° of scope around said rotating shaft 1 by initial position; Said second wire rope 62 can drive said second drive 7 and the said second arm section 3 by initial position and in 0～180 ° of scope, rotate (the definition initial position is a zero degree, clockwise turns to negative angle, counterclockwise rotates to be positive-angle) around said rotating shaft 1.
Under original state:
The length that said first wire rope 61 is wound on said second drive 7 is not less than the half the of said second drive, 7 girths, and the length that said first wire rope 61 is wound on said first drive 5 is not less than the half the of said second drive, 7 girths;
The length that said second wire rope 62 is wound on said second drive 7 is not less than the half the of said second drive, 7 girths, and the length that said second wire rope 62 is wound on said first drive 5 is not less than the half the of said second drive, 7 girths.
Introduce first drive 5 and the identical situation of second drive, 7 external diameters below earlier:
Shown in Fig. 5 A, Fig. 5 B, Fig. 6 A, Fig. 6 B, first drive 5 is identical with the external diameter of second drive 7.
Shown in Fig. 5 A, Fig. 5 B; Under original state; One end of first wire rope 61 is fixed in the 3rd locked point C on first drive 5; The other end is walked around the half cycle of first drive 5 respectively and the half cycle of second drive 7 is fixed in the 4th locked point D on second drive 7, and the distance between the 3rd locked point C and the 4th locked point D is S
34=L;
One end of second wire rope 62 is fixed in the 5th locked point E on first drive 5; The other end is fixed in the 6th locked point F on second drive 7 around the half cycle of first drive 5 and the half cycle of second drive 7 respectively, between the 5th locked point E and the 6th locked point F apart from S
56=L,
Wherein, The 5th locked point E and the 3rd locked point C are arranged at the both sides of first drive 5 and second drive, 7 central point lines respectively; The 6th locked point F and the 4th locked point D are arranged at the both sides of first drive 5 and second drive, 7 central point lines respectively, and L is the center to center distance of first drive 5 and second drive 7.
Shown in Fig. 6 A, Fig. 6 B, be that the second arm section is rotated counterclockwise the sketch map after 180 ° by original state among Fig. 5.
Shown in Fig. 6 A, motor drives first drive 5 rotates counterclockwise 180 ° by initial position, and first drive 5 drives second drive 7 through second wire rope 62 and the second arm section is rotated counterclockwise 180 °.
After second drive 7 rotate in place; The length that second wire rope 62 is walked around on first drive 5 is the girth of first drive 5; Simultaneously 62 of second wire rope are connected (certain with the 6th locked point F on second drive 7; Second wire rope 62 can also have unnecessary length to be wound on second drive 7, and the use amount that can save wire rope is set here), second drive 7 no longer continues to rotate counterclockwise.In this course; Second drive 7 has been rotated counterclockwise 180 ° with respect to initial position; Realized 1 0～180 ° the rotation (the definition initial position is a zero degree, clockwise turns to negative angle, counterclockwise rotate to be positive-angle) in horizontal plane around the shaft of second drive 7 and the second arm section 3.
When first drive 5 rotates counterclockwise through said second drive 7 of second wire rope, 62 drives; Said second drive 7 continues to twine first wire rope 61; After second drive 7 is rotated counterclockwise 180 °; The length that first wire rope 61 is wound in second drive 7 is the girth of second drive 7, and simultaneously 61 of first wire rope are connected with C point on first drive 5 that (certain, first wire rope 61 can also have unnecessary length to be wound on second drive 7; The use amount that can save wire rope is set here), first drive 5 no longer continues to rotate counterclockwise.
This design of first wire rope 61 and second wire rope 62 is actually and complements one another, and when promptly steel cable carries out the active transmission, another root wire rope carries out driven winding, for resetting and preparing during opposite spin.
In like manner; Structure shown in Fig. 5 A, Fig. 5 B also can drive second drives 7 and the second arm section 3 through first drive 5 and in horizontal plane, turn clockwise 180 ° and reset by initial position; Realize 1 rotation (the definition initial position is a zero degree) in-180 °～0 ° scope in horizontal plane around the shaft of second drive 7 and the second arm section 3; Because of the principle shown in its principle and Fig. 6 A, Fig. 6 B is suitable, repeat no more at this, those skilled in the art need not pay creative work and can realize.
Like this, under first drive situation identical, can satisfy the second arm section 3 and 1 in horizontal plane, rotate in-180 °～180 ° angular ranges around the shaft with the external diameter of second drive.
In the initial position of present embodiment; First wire rope twines the first drive half cycle and twines the second drive half cycle; Second wire rope twines the first drive half cycle and twines the second drive half cycle is a kind of most preferred mode, can practice thrift length of steel wire rope to greatest extent.
Be in the initial position of present embodiment, comprise that also first wire rope twines the situation of a circle or many circles on first drive and second drive, and second wire rope twine the situation of a circle or many circles on first drive and second drive.
Among this embodiment, the angle that jib structure horizontally rotates can be confirmed by the angular displacement that motor rotates.
In the another kind of specific embodiment of this area, first drive 5 is different with the external diameter of second drive 7.Shown in Fig. 7 A, Fig. 7 B, Fig. 8 A, Fig. 8 B, the external diameter of first drive 5 is less than the external diameter of second drive 7:
Under original state:
The length that said first wire rope 61 is wound on said second drive 7 is not less than the half the of said second drive, 7 girths, and the length that said first wire rope 61 is wound on said first drive 5 is not less than the half the of said second drive, 7 girths;
The length that said second wire rope 62 is wound on said second drive 7 is not less than the half the of said second drive, 7 girths, and the length that said second wire rope 62 is wound on said first drive 5 is not less than the half the of said second drive, 7 girths.
Shown in Fig. 7 A, Fig. 7 B; Under original state; One end of first wire rope 61 is fixed in the 7th locked point G on second drive 7; The other end is wound in first drive 5 and is fixed in the 8th locked point H on first drive 5 after walking around the half cycle of second drive 7, and the length that first wire rope 61 is wound on first drive 5 is the half the of second drive, 7 girths;
One end of second wire rope 62 is fixed in the 9th locked point I on second drive 7; The other end is wound in first drive 5 and is fixed in the tenth locked point J on first drive 5 after walking around the half cycle of second drive 7, and the length that second wire rope 62 is wound on first drive 5 is the half the of second drive, 7 girths;
Wherein, the 7th locked point G and the 9th locked point I lay respectively at the both sides of first drive 5 and second transmission, 7 central point lines.
Shown in Fig. 8 A, Fig. 8 B, be the second arm section by turn clockwise 180 ° structural representation of original state.
Shown in Fig. 8 A, motor drives first drive 5 is turned clockwise by initial position, and first drive 5 drives second drive 7 along pointer Rotate 180s ° through first wire rope 61.
After 7 rotations of second drive put in place; First wire rope 61 is walked around girth that the length on first drive 5 surpasses first drive 5 (in present embodiment; The external diameter of first drive 5 is less than the external diameter of second drive 7; Surpass a week so first wire rope 61 is walked around first drive, the coiling length of first wire rope 61 on first drive is the girth of second drive 7, can certainly be that first wire rope 61 is wound in length on said first drive 5 greater than the girth of second drive 7); Simultaneously 61 of first wire rope are connected (certain with the 7th locked point G on second drive 7; First wire rope 61 can also have unnecessary length to be wound on second drive 7, and the use amount that can save wire rope is set here), second drive 7 no longer continues to clockwise rotate.In this course; Second drive 7 has turned clockwise 180 ° with respect to initial position; Realized second drive 7 and the second arm section 3 around the shaft 1 in horizontal plane 0～-180 ° rotation (the definition initial position is a zero degree; Clockwise turn to negative angle, counterclockwise rotate to be positive-angle).
When first drive 5 clockwise rotates through said second drive of first wire rope, 61 drives; Said second drive 7 continues to twine second wire rope 62; When second drive 7 turns clockwise after 180 °; The length that second wire rope 62 is wound on second drive 7 is the girth of second drive 7, and simultaneously 62 of second wire rope are connected with the tenth locked point J on first drive 5 that (certain, second wire rope 62 can also have unnecessary length to be wound on first drive 5; The use amount that can save wire rope is set here), first drive 5 no longer continues to clockwise rotate.
This design of first wire rope 61 and second wire rope 62 is actually and complements one another, and when promptly steel cable carries out the active transmission, another root wire rope carries out driven winding, for resetting and preparing during opposite spin.
In like manner; Structure shown in Fig. 7 A, Fig. 7 B also can drive second drives 7 and the second arm section 3 through first drive 5 and in horizontal plane, be rotated counterclockwise 180 ° and reset by initial position; Realize 1 rotation (the definition initial position is a zero degree) in 0～180 ° of scope in horizontal plane around the shaft of second drive 7 and the second arm section 3; Because of the principle shown in its principle and Fig. 8 A, Fig. 8 B is suitable, repeat no more at this, those skilled in the art need not pay creative work and can realize.
Those skilled in the art should also be understood that to be in the initial position of present embodiment, comprises that also first wire rope twines the situation of a circle or many circles on second drive, and first wire rope twines the situation of a circle or many circles on first drive simultaneously; And the second wire rope situation of on second drive, twining a circle or many circles, second wire rope situation of on first drive, twining a circle or enclosing more simultaneously.
In the another kind of specific embodiment of the present invention, as shown in Figure 9, transmission mechanism is a chain, and first drive 5 and second drive 7 are respectively first sprocket wheel and second sprocket wheel, and transmission mechanism is set in first sprocket wheel and second sprocket wheel.
Adopt the kind of drive of chain sprocket, avoided the situation of skidding in the wire rope transmission to take place, also just avoided wire rope being fixed on the operation on the drive simultaneously, operate simplyr, guarantee that the safety of production is carried out smoothly through locked point.In this set-up mode, can control its rotational angle range through drive unit.
The present invention also provides a kind of concrete mixer (not shown), comprises the boom device in the foregoing description.
Through jib structure provided by the invention, boom device and concrete mixer; Realized the function that jib horizontally rotates easily; Adopt rope to carry out transmission simultaneously, drive unit and executing agency can divide and be arranged, and have increased the flexibility of jib general arrangement greatly; The realization of jib action does not need connecting rod, has alleviated the load of drive unit; When not needing jib to do to horizontally rotate, rope mechanism can lock horizontally rotating of jib, and boom device provided by the invention can satisfy the functional requirement of existing jib fully; The present invention has realized interior rotation of horizontal plane of jib under the situation that turntable does not rotate, increased the flexibility of cloth.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. jib structure; It is characterized in that; Comprise the first arm section (2) and the second arm section (3) that connect through rotating shaft (1); Said rotating shaft (1) is provided with the hinge axes of this jib structure end is vertical, and drive unit and first drive (5) are installed on said the first arm section (2), and second drive (7) is rotatably installed on said rotating shaft (1); The said second arm section (3) is fixedly connected with said second drive (7); On said first drive (5) and said second drive (7), transmission mechanism is installed, said drive unit drives said first drive (5) and rotates, and said first drive (5) drives said second drive (7) through said transmission mechanism and the said second arm section (3) is rotated around said rotating shaft (1).
2. jib structure according to claim 1; It is characterized in that; Said transmission mechanism is wire rope (6); Said wire rope (6) is stretched on said first drive (5) and said second drive (7), and can drive said second drive (7) and the said second arm section (3) is rotated in-90 °～90 ° angular ranges around said rotating shaft (1).
3. jib structure according to claim 2 is characterized in that, said wire rope (6) is fixed on said first drive (5) through first locked point (A), is fixed on said second drive (7) through second locked point (B).
4. jib structure according to claim 3; It is characterized in that said first drive (5) is identical with the external diameter of said second drive (7), under original state; Distance between said first locked point (A) and said second locked point (B) is S=L+2R; Wherein, L is the center to center distance between first drive (5) and second drive (7), and R is the radius of first drive (5).
5. jib structure according to claim 1; It is characterized in that; Said transmission mechanism is wire rope (6); Said wire rope (6) is stretched on said first drive (5) and said second drive (7), and can drive said second drive (7) and the said second arm section (3) is rotated in-180 °～180 ° angular ranges around said rotating shaft (1).
6. jib structure according to claim 5; It is characterized in that; Said wire rope (6) comprises that said first wire rope (61) is parallel with said second wire rope (62) by first wire rope (61) and second wire rope (62) of said first drive (5) and said second drive (7) tensioning: said first wire rope (61) can drive said second drive (7) and the said second arm section (3) is rotated in 0～-180 ° of scope around said rotating shaft (1) by initial position; Said second wire rope (62) can drive said second drive (7) and the said second arm section (3) is rotated in 0～180 ° of scope around said rotating shaft (1) by initial position.
7. jib structure according to claim 6 is characterized in that, under original state:
The length that said first wire rope (61) is wound on said second drive (7) is not less than the half the of said second drive (7) girth, and the length that said first wire rope (61) is wound on said first drive (5) is not less than the half the of said second drive (7) girth;
The length that said second wire rope (62) is wound on said second drive (7) is not less than the half the of said second drive (7) girth, and the length that said second wire rope (62) is wound on said first drive (5) is not less than the half the of said second drive (7) girth.
8. jib structure according to claim 1; It is characterized in that; Said transmission mechanism is a chain, and said first drive (5) and said second drive (7) are respectively first sprocket wheel and second sprocket wheel, and said transmission mechanism is set in said first sprocket wheel and said second sprocket wheel.
9. a boom device comprises the joint arm that more piece is hinged successively, it is characterized in that, at least one joint joint arm is each described jib structure in the claim 1 to 8.
10. a concrete mixer is characterized in that, comprises the boom device described in the claim 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057507.1A CN102587667B (en) | 2012-03-06 | 2012-03-06 | Arm support structure, arm support device and concrete pump truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210057507.1A CN102587667B (en) | 2012-03-06 | 2012-03-06 | Arm support structure, arm support device and concrete pump truck |
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| Publication Number | Publication Date |
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| CN102587667A true CN102587667A (en) | 2012-07-18 |
| CN102587667B CN102587667B (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210057507.1A Active CN102587667B (en) | 2012-03-06 | 2012-03-06 | Arm support structure, arm support device and concrete pump truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969666A (en) * | 2021-09-09 | 2022-01-25 | 昆山世越建材设备有限公司 | Concrete pump truck |
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| CN201326278Y (en) * | 2008-11-21 | 2009-10-14 | 北京建研机械科技有限公司 | Material spreading machine with relative movement of three-arm combination |
| CN201730339U (en) * | 2010-08-19 | 2011-02-02 | 三一重工股份有限公司 | Concrete pumping equipment and cantilever device thereof |
| CN202441066U (en) * | 2012-03-06 | 2012-09-19 | 三一重工股份有限公司 | Cantilever crane structure, cantilever crane device and concrete pump truck |
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| CN101214663A (en) * | 2008-01-10 | 2008-07-09 | 上海交通大学 | Flexible controllable mechanism for mechanical arm |
| CN101446134A (en) * | 2008-11-21 | 2009-06-03 | 北京建研机械科技有限公司 | Concrete distributor with arm support capable of both horizontal rotation and pitching movement |
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| CN113969666A (en) * | 2021-09-09 | 2022-01-25 | 昆山世越建材设备有限公司 | Concrete pump truck |
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| CN102587667B (en) | 2015-02-18 |
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