CN107182300B - The intermittent loosenning tiller of rake - Google Patents

Abstract

The invention discloses a kind of intermittent loosenning tillers of rake, including the driving device being set in rack, the bottom of the rack is configured wheel system, which is separately connected intermittently actuation, intermittent loosing earth mechanism and intermittent tine swing mechanism by a driven member.For the present invention under the collective effect of intermittent loosing earth mechanism, intermittent tine swing mechanism and tine guiding mechanism, vertical and yaw motion is may be implemented in tine, is buried, is deflected, loosening the soil and stir native function to realize；Tine upper arm of the present invention realizes that the interval of tine limit point position drives back and forth under the intermittent driving effect of the mating arc slip teeth of fan-shaped centering block, realizes that the fixed point deflection of tine and fixed point reset.

Description

Rake Intermittent Scarifier

technical field

The invention relates to a ripper, in particular to a rake-type intermittent ripper.

Background technique

Most of the field loosening operations use ploughing or rotary tillage and then use a harrow to loosen the soil. This method has good adaptability for field operations, but for small space operations in greenhouses, or inter-row cultivating and loosening operations, traditional methods are used. The specific volume of the working machine is large, and it is difficult to adapt to the requirements of loosening soil.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a method that can simulate the manual hoe-shovel-type clearance loosening operation, has a compact structure, flexible operation, and good field adaptability, and can be used in small spaces and plant rows. Rake-type intermittent scarifiers for interstitial work.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions: a rake-type intermittent scarifier, comprising a driving device arranged on a frame, a ground wheel system is arranged at the bottom of the frame, and the driving device is driven by a driven device The parts are respectively connected to the intermittent ground wheel drive mechanism, the intermittent ripper mechanism and the intermittent ripper tooth swing mechanism; among them,

The intermittent wheel drive mechanism includes a cam coaxially installed with the follower, the cam is in contact with one end of the push tooth, the middle of the push tooth is fixed on the frame through a sliding sleeve, and the push tooth can be axially moved on the sliding sleeve. Sliding, a compression spring is arranged on the push tooth between the sliding sleeve and the cam, and the other end of the push tooth is intermittently connected with the ratchet wheel, and the ratchet wheel is installed coaxially with the driving ground wheel of the ground wheel system;

The intermittent ripper mechanism includes a lever coaxially installed with the follower and intermeshing ripper driving wheels and ripper driven wheels arranged in front of the frame. The ripper driving wheel and the ripper driven wheel are respectively opposite to the follower. The radial positioning is installed on the ripper drive axle and the ripper driven axle. The follower shaft, the ripper drive axle, and the ripper driven axle are installed on the frame in an isosceles triangle in the radial direction, and the follower is installed on the frame in an isosceles triangle shape. The shaft is located on the vertical plane of the middle point of the vertical distance between the driven wheel shaft and the driving wheel shaft for loosening; a first chute is opened above the lever, and a movable pin shaft is installed in the first chute. A contact bearing is installed near one end of the loosening driving wheel, the third swing rod is fixedly installed on the loosening driving wheel shaft, the second swing rod is fixedly installed on the loosening driven wheel shaft, and the contact bearing on the movable pin shaft is during the rotation of the follower , intermittently interfere with the second and third pendulum rods; the left and right rack drive gears are installed on the loose soil driven wheel shaft, and the left and right rack drive gears are respectively set on the opposite frame. The left and right racks are respectively installed in the right rack groove, and the left and right rack drive gears are meshed with the left and right racks respectively, and the bottom of the left and right racks are hingedly installed with the loosening teeth fixing pins. When the second and third pendulums swing, the left and right rack drive gears coaxially installed on the driven shaft of the soil loosening gear are intermittently reciprocated forward and reversely, so that the left and right racks, move down;

The intermittent ripper tooth swing mechanism includes first and second crank-rocker mechanisms, the front end of the first crank-rocker mechanism is connected with the driven member, and the rear end is hinged with a fan-shaped pendulum block, along the arc section of the outer circumference of the fan-shaped pendulum block A sliding guide rail is provided, the first and second baffles of the sliding guide rail are respectively provided with a first baffle plate and a second baffle plate, and the sliding guide rail is sleeved with arc-shaped sliding teeth, and the arc-shaped sliding teeth are engaged with driven sliding teeth , the second crank at the front end of the second crank-rocker mechanism is installed on the shaft of the driven sliding tooth, and the rear end of the second crank-rocker mechanism is fixedly connected to the ripper rack; the side of the rack at the front end is provided with a U-shaped guide The open end of the U-shaped guide column is provided with a guide block, and a U-shaped guide groove is formed between the U-shaped guide column and the guide block for the fixing pin of the upper arm of the ripper tooth to enter and exit, and the fixing pin of the upper arm of the ripper tooth is fixed on the upper arm of the ripper tooth The lower end of the upper arm of the ripper tooth is hingedly fixed with the ripper tooth frame through the ripper tooth fixing pin shaft, the rear end of the second crank rocker mechanism is provided with a ripper tooth control pin, and the upper arm of the ripper tooth is provided with a ripper tooth control pin. The second chute, the control pin of the ripper tooth is sleeved and fixed in the second chute, when the second crank rocker mechanism swings up and down to the extreme position, the end of the fixing pin of the upper arm of the ripper tooth enters and exits the U-shaped guide groove, When the end of the fixing pin of the upper arm of the ripper tooth slides out of the U-shaped guide groove, the second crank rocker mechanism swings up and down to realize the deflection of the ripper tooth frame.

A further improvement of the above solution is that the driving device includes a power device and a gearbox arranged on the frame, the power device is connected to the gearbox through a belt, the gearbox is provided with a driving sprocket, and the driven member is a slave. The driving sprocket is connected by a chain between the driving sprocket and the driven sprocket.

A further improvement of the above solution is that the fan-shaped pendulum block is provided with a U-shaped groove in the radial direction, and the connecting rod shaft at the rear end of the first crank-rocker mechanism is installed in the U-shaped groove and is hingedly fixed by bolts. The U-shaped groove is arranged at the symmetrical centerline position of the fan-shaped pendulum block. The fan-shaped angle of the fan-shaped pendulum block is between 90°-180°.

A further improvement of the above solution is that the first crank-rocker mechanism includes a first crank mounted on the driven soil loosening axle, the first crank is hinged to one end of the first connecting rod, and the other end of the first connecting rod is fixedly arranged a connecting rod shaft; the second crank-rocker mechanism includes a second crank, the second crank is hinged with a second connecting rod, the second connecting rod is hinged with one end of a first swing rod, and the first swing rod is pivoted through a fixed shaft The frame, the other end of the first swing rod is provided with a ripper tooth control pin.

A further improvement of the above solution is that the arc length of the arc-shaped sliding teeth is smaller than the arc length of the sliding guide rail.

A further improvement of the above solution is that the rotation radius of the contact bearing is larger than the rotation radius of the second and third pendulum rods.

A further improvement of the above solution is that the number of teeth of the ripper driving wheel and the ripper driven wheel are the same.

In the present invention, under the action of the intermittent ripper tooth swing mechanism, the ripper teeth can realize vertical and deflection movements, so as to realize the functions of entering the soil, deflecting, loosening the soil and stirring the soil; in addition, under the action of the intermittent ripper mechanism, The left and right racks realize intermittent back-and-forth up and down fixed-distance movement; the ripper rack of the present invention is provided with an upper arm of the ripper, and the upper arm is driven by the intermittent driving action of the fan-shaped pendulum block matching the arc-shaped sliding teeth to realize the limit point position of the ripper. It is driven back and forth intermittently to realize the fixed-point deflection and fixed-point reset of the loosening teeth; the driving ground wheel of the present invention completes the intermittent rotation of the driving ground wheel under the action of the cam driving the pushing teeth and the pushing teeth driving the ratchet, and cooperates with the loosening teeth after excavation. Fixed point when feeding and burying.

Description of drawings

Fig. 1 is a front view of the rake-type intermittent scarifier of the present invention.

Fig. 2 is a left axial side view of the rake-type intermittent scarifier of the present invention.

Fig. 3 is a right axial side view of the rake-type intermittent scarifier of the present invention.

Fig. 4 is a diagram showing the limit position of the slack tooth of the raking intermittent scarifier of the present invention.

FIG. 5 is a schematic structural diagram of the intermittent ground wheel drive mechanism of the present invention.

FIG. 6 is a schematic diagram of the transmission structure of the intermittent ripping mechanism of the present invention.

FIG. 7 is a schematic diagram of the transmission structure of the intermittent ripper tooth swing mechanism of the present invention.

In the figure: 1. Power unit; 2. Belt; 3. Gearbox; 4. Frame; 5. Right rack drive gear; 6. Left rack; 7. Ripper tooth upper arm; 8. Second chute; 9. The first swing rod; 10. The ripper tooth; 11. The first crank; 12. The first connecting rod; 13. The connecting rod shaft; 14. The fixing pin of the upper arm of the ripper tooth; Driving sprocket; 17. Walking ground wheel; 18. Driving ground wheel; 19. Ratchet; 20. Push tooth; 201 Spherical convex plate; Baffle plate 202; ; 231. Driven sprocket shaft; 24. Cam; 25. Loosening tooth fixing pin; 26. Right rack; 27. Rack groove; 28. Contact bearing; 29. Left rack drive gear; 30. Loosening driven wheel; 301. ripper driven axle; 31. second swing rod; 32. ripper driving wheel; 321. ripper drive axle; 33. lever pin shaft; 34. lever; 35. third pendulum Rod; 36. Chain; 37. Guide post; 38. Guide groove; 39. Control pin of loosening tooth; 40. Second connecting rod; 41. Fixed shaft; 42. Driven sliding tooth; .Arc sliding teeth; 45.Second crank.

Detailed ways

As shown in FIGS. 1 to 7 , an embodiment of a rake-type scarifier of the present invention includes a driving device arranged on the frame 4 , and the driving device is connected to the intermittent ground wheel driving mechanism, Intermittent ripper mechanism and intermittent ripper tooth swing mechanism. The bottom of the frame 4 is provided with a ground wheel system consisting of a walking ground wheel 17 and a driving ground wheel 18 .

The driving device includes a power unit 1 and a gearbox 3 . The power unit 1 is connected to the gearbox 3 via a belt 2 . The gearbox 3 is provided with a driving sprocket 16 , and the driving sprocket 16 is connected to the driven sprocket 23 through a chain 36 .

The intermittent ground wheel drive mechanism includes a cam 24 coaxially installed with the driven sprocket 23 , and the cam 24 is in contact with one end of the push tooth 20 . The push tooth 20 is fixed on the frame 4 through the sliding sleeve 21 , and the push tooth 20 can slide axially on the sliding sleeve 21 . The push tooth 20 between the sliding sleeve 21 and the cam 24 is provided with a baffle plate 202 and a compression plate 202 . Spring 22, the other end of the push tooth 20 is intermittently connected with the ratchet wheel 19, the ratchet wheel 19 is coaxially installed with the driving ground wheel 18 of the ground wheel system, so that the intermittent rotation of the driving ground wheel 18 can be realized, and the driving ground Round 17. In order to smooth the contact between the push tooth 20 and the connecting end of the cam 24 , a spherical convex plate 201 is provided at the cam connecting end of the push tooth 20 .

The intermittent ripper mechanism includes a lever 34 coaxially installed with the driven sprocket 23 and a ripper driving wheel 32 and a ripper driven wheel 30 which are intermeshed in front of the frame 4 . The ripper driving wheel 32 and the ripper The soil driven wheel 30 is radially positioned relative to the driven sprocket 23 and installed on the soil loosening driving wheel shaft 321 and the soil loosening driven wheel shaft 301 respectively. It is installed on the frame 4 in an isosceles triangle shape, and the driven sprocket shaft 231 is located on the vertical plane of the middle point of the vertical distance between the driven wheel shaft 301 and the driving wheel shaft 321; The first chute 341, the movable pin shaft 33 is installed in the first chute 341, the contact bearing 28 is installed on one end of the movable pin shaft 33 close to the ripper driving wheel 32, and the third swing rod 35 is fixedly installed on the ripper driving wheel shaft 321 , the second swing rod 31 is fixedly installed on the loose soil driven wheel shaft 301, and the contact bearing 28 on the movable dial pin shaft 33 is intermittently connected with the second and third swing rods 31 and 35 during the rotation of the driven sprocket 23. ; The left and right rack drive gears 29 and 5 are installed on the loose soil driven wheel shaft 301. The left and right rack drive gears 5 are respectively set on the opposite rack 4. Left and right rack slots 27, left and right rack slots The left and right racks 6 and 26 are respectively installed in 27, and the left and right rack drive gears 29 and 5 are meshed with the left and right racks 6 and 26 respectively. The fixed pin 25 is hinged to install the ripper rack 15 of the ripper tooth 10. When the second and third swing rods 31 and 35 swing intermittently, the left and right rack drive gears are coaxially installed on the ripper driven axle 301. 29, 5 intermittently reciprocate forward and reverse rotation, so that the left and right racks 6, 26 move up and down. In this embodiment, the rotation radius of the contact bearing 28 is larger than the rotation radius of the second and third pendulum rods 31 and 35 , and the number of teeth of the ripper driving wheel 32 and the ripper driven wheel 30 are the same.

The intermittent ripper tooth swing mechanism includes first and second crank rocker mechanisms. The first crank-rocker mechanism includes a first crank 11 mounted on the driven soil loosening axle 301 , the first crank 11 is hinged to one end of the first connecting rod 12 , and the other end of the first connecting rod 12 is fixedly provided with a connecting rod shaft 13 . The second crank-rocker mechanism includes a second crank 45 , the second crank 45 is hinged with the second connecting rod 40 , the second connecting rod is hinged with one end of the first swing rod 9 , and the middle of the first swing rod 9 passes through the fixed shaft 41 Pivoted on the frame 4 , the other end of the first swing rod 9 is provided with a ripper tooth control pin 39 . The rear end of the first crank-rocker mechanism is hinged to a sector-shaped pendulum block 43 pivoted on the frame 4 through the connecting rod shaft 13. A sliding guide rail 431 is provided along the arc-shaped section of the outer circumference of the sector-shaped pendulum block. The sliding rail 431 The first baffle 432 and the second baffle 433 are respectively set at the first and second ends of the sliding guide rail 431, and the sliding guide rail 431 is sleeved with an arc-shaped sliding tooth 44, and the arc length of the arc-shaped sliding tooth 44 is smaller than that of the sliding guide rail 431. , a driven sliding tooth 42 is engaged with the arc-shaped sliding tooth 44, the second crank 45 of the second crank-rocker mechanism is installed on the shaft of the driven sliding tooth 42, and the loosening tooth control pin of the second crank-rocker mechanism 39 is inserted and fixed in the second chute 8 of the upper arm 7 of the ripper tooth hinged with the ripper tooth frame 15 . In order to make the swing angle of the fan-shaped pendulum block 43 adjustable, the fan-shaped pendulum block 43 is provided with a U-shaped groove 434 in the radial direction, and the connecting rod shaft 13 at the rear end of the first crank-rocker mechanism is installed in the U-shaped groove 434, The bolts are hingedly fixed, and the U-shaped grooves 434 are arranged at the symmetrical centerline positions of the sector-shaped pendulum blocks 43 . The fan-shaped angle of the fan-shaped pendulum block 43 is between 90° and 180°.

The guide mechanism of the ripper tooth includes a U-shaped guide column 37 arranged on one side of the frame 4, the open end of the U-shaped guide column 37 is provided with a guide block 371, and the upper arm of the ripper tooth is formed between the U-shaped guide column 37 and the guide block 371. U-shaped guide slot 38 for the pin 14 to enter and exit. The upper arm fixing pin 14 of the ripper tooth is fixed on the upper part of the upper arm 7 of the ripper tooth, and the second chute 8 is arranged on the upper arm 7 of the ripper tooth. The upper arm 7 of the ripper tooth and the ripper tooth frame 15 are fixed by the ripper tooth The pin shaft 25 is hingedly fixed, and the loosening tooth control pin 39 at the end of the first swing rod 9 of the second crank-rocker mechanism is inserted and fixed in the second chute 8 . When the first swing rod 9 of the second crank-rocker mechanism swings up and down around the fixed shaft 41, the ripper tooth control pin 39 slides up and down along the second chute 8, and makes the ripper tooth upper arm fixing pin 14 move upward and downward. The end goes in and out of the U-shaped guide groove 38. When the end of the fixing pin 14 of the upper arm of the ripper tooth slides out of the U-shaped guide groove 38, the first swing rod 9 of the second crank-rocker mechanism swings up and down, so that the ripper tooth is biased. Swing the soil; when the end of the fixing pin 14 of the upper arm of the loosening tooth slides into the U-shaped guide groove 38, the first swing rod 9 of the second crank rocker mechanism swings up and down, and the fixing pin 14 of the upper arm of the loosening tooth is swayed up and down. Moving up and down along the U-shaped guide groove 38 further ensures the up and down movement of the ripper teeth 10 .

When working specifically: the output power of the power unit 1 drives the gearbox 3 to decelerate and increase the torque through the belt 2, and then drives the chain 36 to drive the driven sprocket 23 through the driving sprocket 16, and the driven sprocket 23 drives the cams 24 and 24 on the shaft. The lever 34, on the one hand, the cam 24 drives the push teeth 20, the push teeth 20 are fixed on the sliding sleeve 21, and abut on the cam 24 under the action of the compression spring 22, the push teeth 20 drive the ratchet wheel 19, and the ratchet wheel 19 drives the driving ground wheel 18. Do intermittent rotation, so as to realize the intermittent forward movement of the scarifier as a whole; on the other hand, the lever 34 uses the movable pin shaft 33 installed in a circular motion to intermittently drive the second swing rod 31 and the third swing rod 31. The rod 35 and the second swing rod 31 are fixed coaxially with the loosening driven wheel 30 , the left rack drive gear 29 and the right rack drive gear 5 , and the third swing rod 35 is coaxially fixed with the loosening driving wheel 32 . The movable pin shaft 33 is driven back and forth between the second swing rod 31 and the third swing rod 35, so that the left rack drive gear 29 drives the left rack 6, the right rack drive gear 5 drives the right rack 26, and the left and The right rack moves up and down in the rack groove 27, and under the combined action of the left and right racks, the ripper teeth 10 are driven downward into the soil. During the downward movement of the ripper 10, the fixing pin 14 of the upper arm of the ripper is always fixed in the vertical section of the U-shaped guide groove 38, so as to ensure that the ripper 10 goes down vertically into the soil. On the other hand, the driven sprocket 23 drives the first crank 11, the first crank 11 drives the first connecting rod 12, and the first connecting rod 12 drives the sector-shaped pendulum block 43 to swing back and forth. Tooth 44, the arc-shaped sliding tooth 44 swings back and forth on the fan-shaped pendulum block 43 with a gap, the arc-shaped sliding tooth 44 drives the driven sliding tooth 42, the driven sliding tooth 42 drives the second crank 45 and the second connecting rod 40, and finally drives The first swing rod 9 swings intermittently around the fixed shaft 41, so that the control pin 39 of the ripper tooth at the end of the first swing rod 9 moves in the second chute 8, thereby driving the upper arm 7 of the ripper tooth to swing intermittently. It is shown that when the ripper tooth 10 reaches the lowest position, the fixing pin 14 of the upper arm of the ripper tooth slides out of the U-shaped guide groove 38, which drives the whole ripper tooth 10 to incline forward, so as to realize the effect of soil ripping and agitation after entering the soil. When the rack 6 and the right rack 26 move up to the highest point, the fixing pin 14 of the upper arm of the loosening tooth returns to the U-shaped guide groove 38 from the opening at the upper end of the U-shaped guide groove 38 under the action of the first swing rod 9 , The ripper teeth 10 are restored to the vertical state, and then the next cycle of soil entry, deflection, and soil agitation and loosening is performed.

The ground wheel 18 driven by the whole machine is intermittently driven by the ratchet wheel 19 to complete intermittent driving. The time matching point of the driving process is that when the loosening tooth 10 is in the soil, the ground wheel 18 is in a static state. When the loosening tooth 10 is unearthed, the ground wheel 18 is driven intermittently forward Travel the specified ripper spacing.

Claims (9)

1. A rake-type intermittent scarifier, comprising a drive device arranged on a frame (4), the bottom of the frame is provided with a ground wheel system, and it is characterized in that, the drive device is respectively connected intermittently by a driven member ground wheel drive mechanism, intermittent ripper mechanism and intermittent ripper tooth swing mechanism; among which, The intermittent type wheel drive mechanism includes a cam (24) coaxially installed with the follower, the cam is in contact with one end of the push tooth (20), the middle part of the push tooth is fixed on the frame through a sliding sleeve (21), and pushes the The tooth can slide axially on the sliding sleeve, a compression spring (22) is arranged on the push tooth between the sliding sleeve and the cam, and the other end of the push tooth is intermittently connected with the ratchet (19), which is connected with the ground wheel. The driving ground wheel (18) of the system is installed coaxially; The intermittent loosening mechanism includes a lever (34) coaxially installed with the driven member, and an intermeshing loosening driving wheel (32) and a loosening driven wheel (30) arranged in front of the frame (4) for loosening soil. The driving wheel (32) and the loosening driven wheel (30) are radially positioned and installed on the loosening driving wheel shaft (321) and the loosening driven wheel shaft (301) respectively relative to the driven member, and the driven member shaft and the loosening driving wheel shaft , The loose soil driven wheel shaft is installed on the frame in an isosceles triangle shape in the radial direction, and the follower shaft is located on the vertical plane of the midpoint of the vertical distance between the loose soil driven wheel axis and the soil loose driving wheel axis; the lever (34) A first chute (341) is opened above, a movable pin shaft (33) is installed in the first chute, and a contact bearing (28) is installed on one end of the movable pin shaft close to the driving wheel (32) to loosen the The third swing rod (35) is fixedly installed on the soil driving wheel shaft, and the second swing rod (31) is fixedly installed on the soil loosening driven wheel shaft. The second and third pendulum rods (31, 35) are in contact and connected; the left and right rack drive gears (29, 5) are installed on the loose soil driven wheel shaft, and the left and right rack drive gears are respectively set on the opposite racks. The rack slot (27), the left and right racks (6, 26) are respectively installed in the left and right rack slots, and the left and right rack drive gears (29, 5) are respectively connected with the left and right racks (6, 26). 26) Meshing, the bottoms of the left and right racks (6, 26) are hingedly mounted on the ripper rack (15) of the ripper (10) through the ripper fixing pin (25), and the second and third swing rods ( 31, 35) When swinging, the left and right rack drive gears coaxially installed on the ripper driven wheel shaft intermittently reciprocate forward and reversely, so that the left and right racks move up and down to drive the ripper teeth to move up and down. , move down; The intermittent ripper tooth swing mechanism includes first and second crank-rocker mechanisms, the front end of the first crank-rocker mechanism is connected with the driven member, and the rear end is hinged with a fan-shaped pendulum block (43), along the outer circumference of the fan-shaped pendulum block The arc section is provided with a sliding guide rail (431), a first baffle plate (432) and a second baffle plate (433) are respectively set at the front and rear ends of the sliding guide rail, and arc sliding teeth are sleeved on the sliding guide rail (44), a driven sliding tooth (42) is engaged with the arc sliding tooth, and the second crank (45) at the front end of the second crank-rocker mechanism is installed on the shaft of the driven sliding tooth. The second crank-rocker mechanism The rear end of the rack is fixedly connected to a ripper rack (15) with ripper teeth; a U-shaped guide post (37) is provided on one side of the front end of the frame, a guide block (371) is provided at the open end of the U-shaped guide post, and the U-shaped guide post A U-shaped guide groove (38) is formed between the upper arm fixing pin (14) of the ripper tooth and the guide block. The lower end of the upper arm of the ripper tooth and the ripper tooth frame (15) are hingedly fixed by the ripper tooth fixing pin (25), and the rear end of the second crank rocker mechanism is provided with a ripper tooth control pin (39), the ripper tooth The upper arm is provided with a second chute (8), the loosening tooth control pin (39) is sleeved and fixed in the second chute (8), when the second crank rocker mechanism swings up and down to the extreme position, the The end of the fixing pin (14) of the upper arm of the soil tooth goes into and out of the U-shaped guide groove (38). When the end of the fixing pin (14) of the upper arm of the loosening tooth slides out of the U-shaped guide groove, the second crank rocker mechanism swings up and down to realize Deflection of the ripper rack. 2. A rake-type intermittent scarifier according to claim 1, characterized in that the drive device comprises a power device (1) and a gearbox (3) arranged on the frame (4), the The power unit is connected to a gearbox (3) via a belt (2), the gearbox is provided with a driving sprocket (16), the driven member is a driven sprocket (23), and the driving sprocket (16) is connected to the driven sprocket (16). The sprockets (23) are connected by chains. 3. A rake-type intermittent scarifier according to claim 1, characterized in that, a U-shaped groove (434) in a radial direction is provided on the sector-shaped pendulum block (43), and the first crank The connecting rod shaft (13) at the rear end of the rocker mechanism is installed in the U-shaped groove and is hingedly fixed by bolts. 4 . The rake type intermittent scarifier according to claim 3 , wherein the U-shaped groove is arranged at the symmetrical centerline position of the fan-shaped pendulum block. 5 . 5 . The rake-type intermittent scarifier according to claim 1 , wherein the sector angle of the sector-shaped pendulum block is between 90° and 180°. 6 . 6. A rake-type intermittent scarifier according to claim 1, wherein the first crank-rocker mechanism comprises a first crank (11) mounted on the scarifying driven axle (301) , the first crank (11) is hinged to one end of the first connecting rod (12), and the other end of the first connecting rod (12) is fixedly provided with a connecting rod shaft (13); the second crank rocker mechanism includes a second crank (45), the second crank (45) is hinged to the second connecting rod (40), the second connecting rod is hinged to one end of the first swing rod (9), the first swing rod is pivoted through the fixed shaft (41) The other end of the first swing rod is provided with a ripper tooth control pin (39). 7 . The rake-type intermittent scarifier according to claim 1 , wherein the arc length of the arc-shaped sliding teeth ( 44 ) is smaller than the arc length of the sliding guide rail ( 431 ). 8 . 8 . The rake type intermittent scarifier according to claim 1 , wherein the rotation radius of the contact bearing ( 28 ) is larger than the rotation radius of the second and third pendulum rods ( 31 , 35 ). 9 . 9 . The rake type intermittent scarifier according to claim 1 , wherein the number of teeth of the scarifying driving wheel ( 32 ) and the scarifying driven wheel ( 30 ) are the same. 10 .