CN212553311U

CN212553311U - PCB (printed circuit board) reversing machine

Info

Publication number: CN212553311U
Application number: CN202020794825.6U
Authority: CN
Inventors: 高亚松
Original assignee: Dongguan Hongren Automation Equipment Technology Co ltd
Current assignee: Dongguan Hongren Automation Equipment Technology Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-02-19
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to a PCB circuit board processing technology field, more specifically say, it relates to a PCB circuit board commutator, and its technical scheme main points are: including the organism, the length direction of organism is unanimous with the walking direction of PCB board circuit board, and the walking direction of following PCB board on the organism is including centering mechanism, steering mechanism and sequence mechanism in proper order, and centering mechanism includes first transport structure and sets up the first push pedal structure in first transport structure both sides, and steering mechanism includes the rotary disk of second transport structure and liftable, and sequence mechanism includes third transport structure and sets up the second push pedal structure in third transport structure both sides, the utility model discloses a PCB circuit board reversing machine enough carries and automatic reversing to PCB circuit board between many brush mills to reduce the harmomegathus problem of PCB circuit board appearance, improve the product quality.

Description

PCB (printed circuit board) reversing machine

Technical Field

The utility model belongs to the technical field of the PCB circuit board processing technique and specifically relates to a PCB circuit board reversing machine.

Background

PCB circuit board is electronic components electrical connection's provider, and PCB circuit board production process includes a lot of processes, and wherein the process of brushing is an important link, and the brush accessible brush mill of PCB circuit board goes on, through the brush of brush mill, can get rid of excessive glue on the PCB circuit board, and brush mill can also get rid of PCB circuit board surface oxide layer and ash layer simultaneously.

Brush mill can use many brush mills to go on removing the in-process that overflows to glue, and many brush mills can make two upper and lower surfaces of PCB circuit board all can only receive the ascending brush polish of one side towards a direction to lead to PCB circuit board to produce the harmomegathus, finally influence the product quality. In order to reduce the problem of expansion and shrinkage of the PCB, a device capable of reversing the PCB between a plurality of brush mills is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a PCB circuit board commutator can carry and automatic switching-over to the PCB circuit board between many brush mills to reduce the problem that harmomegathus appears in the PCB circuit board, thereby improve the product quality.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a PCB circuit board commutator, includes the organism, the length direction of organism is unanimous with the walking direction of PCB board circuit board, follow the walking direction of PCB circuit board on the organism and include in proper order:

the centering mechanism comprises a first conveying structure and first push plate structures arranged on two sides of the first conveying structure;

the steering mechanism comprises a second conveying structure and a rotary disc capable of ascending and descending;

and the sequence mechanism comprises a third conveying structure and second push plate structures arranged on two sides of the third conveying structure.

By adopting the technical scheme, the PCB sequentially passes through the centering mechanism, the steering mechanism and the sequence mechanism on the machine body, the PCB is moved to the center of the first conveying structure through the first push plate structure on the centering mechanism so as to be accurately conveyed to the rotary disk, the rotary disk is lifted and steered, the rotary disk can rotate for 90 degrees or 180 degrees, then the rotary disk descends so as to enable the steered PCB to be continuously conveyed to the sequence mechanism, the PCB enters the next brush grinding machine at different positions through the second push plate pair on the sequence mechanism, the brush wheels of the brush grinding machine are prevented from being too fast consumed due to the fact that the brush wheels are arranged at the same position, the PCB is reversed among a plurality of brush grinding machines through the centering mechanism, the steering mechanism and the sequence mechanism, and the PCB can be brushed in different directions on the plurality of brush grinding machines, the expansion and shrinkage of the PCB are reduced, and the product quality is improved.

The utility model discloses further set up to: the first conveying structure is consistent with the third conveying structure, the first conveying structure comprises a plurality of rollers which are arranged at intervals along the length direction of the machine body, and a first transmission structure is arranged among the rollers.

By adopting the technical scheme, the centering structure and the sequence mechanism can convey the PCB through the rollers.

The utility model discloses further set up to: the first transmission structure comprises a first belt pulley arranged at one end of the roller and a first belt wound on the first belt pulleys, wherein one end of the roller is further provided with a second belt pulley, the machine body is provided with a first motor, an output shaft of the first motor is provided with a third belt pulley, and a second belt is wound between the second belt pulley and the third belt pulley.

Through adopting above-mentioned technical scheme, the output shaft drive third belt pulley that first motor drove rotates to drive the second belt pulley through the second belt and rotate, thereby make one of them roller rotate, when one of them roller rotated, the first belt pulley on this roller rotated and drives a plurality of first belt pulleys through first belt and rotate, thereby made a plurality of rollers rotate, and then carried the PCB circuit board.

The utility model discloses further set up to: first push pedal structure and second push pedal structure are unanimous, first push pedal structure includes two parallel guide rails of horizontal setting in the roller below, slides and sets up two slides on two guide rails and set up first push pedal and the second push pedal on two slides respectively, two the slide removes through setting up two second transmission structure on the organism respectively, first push pedal and second push pedal are connected with two slides through vertical branch respectively, first push pedal and second push pedal all are located the top of roller.

Through adopting above-mentioned technical scheme, under the effect of second transmission structure, two slides slide along the guide rail of two parallels to make two slides drive first push pedal and the second push pedal of setting at its top respectively, thereby make first push pedal and second push pedal can follow the length direction of guide rail and remove, and then make first push pedal and the second push pedal of first push pedal structure can carry out the centering to PCB circuit board, the first push pedal and the second push pedal of second push pedal structure can carry out the sequence to PCB circuit board.

The utility model discloses further set up to: the second transmission structure comprises a fourth belt pulley and a fifth belt pulley, the fourth belt pulley and the fifth belt pulley are respectively arranged on two sides of the top of the machine body, a third belt is wound between the fourth belt pulley and the fifth belt pulley, the fourth belt pulley is driven by a second motor, and each third belt is connected with a sliding seat through a fixing piece.

Through adopting above-mentioned technical scheme, second motor drive fourth belt pulley rotates for roll up and establish the third belt removal between fourth belt pulley and fifth belt pulley, two third belts drive two slides respectively and remove, thereby drive first push pedal and second push pedal and remove.

The utility model discloses further set up to: the second transport structure includes many dwangs, many the length direction interval of organism is followed to the dwang sets up, the coaxial a plurality of gyro wheels that are provided with on the dwang, many be provided with third transmission structure between the dwang.

Through adopting above-mentioned technical scheme, under the effect of third transmission structure, many dwangs rotate for gyro wheel on the dwang carries PCB circuit board.

The utility model discloses further set up to: third transmission structure establishes the fourth belt on a plurality of sixth belt pulleys including setting up the sixth belt pulley in dwang one end and book, one of them the one end of dwang still is provided with the seventh belt pulley, be provided with the third motor on the organism, the output shaft of third motor has the eighth belt pulley, it is equipped with the fifth belt to roll up between seventh belt pulley and the eighth belt pulley.

Through adopting above-mentioned technical scheme, the eighth belt pulley of third motor drive rotates, and the eighth belt pulley drives the seventh belt pulley through the fifth belt and rotates for one of them dwang rotates, and when one of them dwang rotated, the sixth belt pulley on this dwang drove a plurality of sixth belt pulleys through the fourth belt and rotates, thereby made a plurality of dwangs rotate, and then made the gyro wheel on the dwang carry PCB circuit board.

The utility model discloses further set up to: the rotating disc is arranged above the rotating rod, a hole for protruding and exposing the roller is formed in the rotating disc, and a vertical rotating shaft is connected to the bottom of the rotating disc;

the lifting frame is arranged in the machine body, the rotating shaft is rotatably arranged on the lifting frame, and the bottom of the lifting frame is connected with a lifting cylinder;

the lifting frame is provided with a fourth motor, an output shaft of the fourth motor is connected with a driving gear, a driven gear is connected to the rotating shaft, and the driving gear is meshed with the driven gear.

Through adopting above-mentioned technical scheme, when the PCB circuit board carries the top to the rotary disk, the lift cylinder upwards promotes the crane, thereby make the rotary disk rise and lift the PCB circuit board, then under the drive of fourth motor, drive gear drives driven gear rotatory, driven gear drives the pivot and rotates, thereby make the rotary disk rotate, and then make the PCB circuit board on the rotary disk carry out the switching-over, the rotary disk descends and makes the PCB circuit board fall to and continue to carry forward on the gyro wheel afterwards, through the rotation of rotary disk, the switching-over to PCB circuit board has been accomplished fast.

To sum up, the utility model discloses following beneficial effect has:

firstly, the centering mechanism performs center positioning on the PCB, so that the PCB is accurately conveyed to the rotating disc;

the rotating disc can be lifted and rotated, so that the PCB is reversed, the PCB can be brushed in different directions on a plurality of brushing mills, the expansion and shrinkage of the PCB are reduced, and the product quality is improved;

thirdly, the sequence mechanism can enable the PCB to enter the next brush grinding machine at different positions, and the brush wheel of the brush grinding machine is prevented from being consumed too fast due to the fact that the same position is ground and brushed, so that the product quality is further improved.

Drawings

Fig. 1 is an overall schematic view of the inverter in the present embodiment;

FIG. 2 is a schematic structural view of the centering mechanism in the present embodiment;

FIG. 3 is a schematic structural view of a first pusher plate structure according to this embodiment;

FIG. 4 is a schematic structural view of a steering mechanism in the present embodiment;

fig. 5 is a structural sectional view of the steering mechanism in the present embodiment.

In the figure:

1. a body; 11. a main body portion; 12. an extension portion;

2. a centering mechanism; 21. a first conveying structure; 211. a roller; 212. a first pulley; 213. a second pulley; 214. a third belt pulley; 215. a first belt; 216. a second belt; 217. a first motor; 22. a first push plate structure; 221. a guide rail; 222. a slide base; 223. a first push plate; 224. a second push plate; 225. a strut; 226. a fourth belt pulley; 227. a fifth belt pulley; 228. a third belt; 229. a second motor; 220. a fixing sheet; 23. an installation table;

3. a steering mechanism; 31. a second conveying structure; 32. rotating the disc; 33. rotating the rod; 331. a roller; 332. a sixth belt pulley; 333. a seventh belt pulley; 334. an eighth belt pulley; 335. a fourth belt; 336. a fifth belt; 337. a third motor; 34. a rotating shaft; 35. a lifting frame; 36. a lifting cylinder; 37. a fourth motor; 38. a drive gear; 39. a driven gear;

4. a sequencing mechanism; 41. a third conveying structure; 42. a second push plate structure.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

A PCB (printed Circuit Board) commutator is used for being placed among a plurality of brush mills, and comprises a machine body 1, wherein the machine body 1 comprises a main body part 11 positioned in the middle and extension parts 12 respectively arranged on two sides of the main body part 11, so that the whole machine body 1 is in a T shape. The length direction of the machine body 1 is consistent with the travelling direction of the PCB, a centering mechanism 2, a steering mechanism 3 and a sequence mechanism 4 are sequentially arranged on the machine body 1 along the travelling direction of the PCB, the steering mechanism 3 is arranged on the main body part 11, and the centering mechanism 2 and the sequence mechanism 4 are respectively arranged on the two extension parts 12.

As shown in fig. 1 to 3, the centering mechanism 2 includes a first conveying structure 21 and a first push plate structure 22, and the sequencing mechanism 4 includes a third conveying structure 41 and a second push plate structure 42. The first conveying structure 21 is used for conveying the PCB circuit board to the steering mechanism 3, the third conveying structure 41 is used for conveying the reversed PCB circuit board to the next brush grinding machine, and the first conveying structure 21 and the third conveying structure 41 are consistent in structure. The first push plate structure 22 is used to push the PCB circuit board to the center of the first conveying structure 21 so that the PCB circuit board enters from the center position onto the steering mechanism 3. The second push plate structure 42 is used for arranging the PCB circuit boards, so that the PCB circuit boards can enter the next brush grinding machine from the left side of the third conveying structure 41, the right side of the third conveying structure 41 and the three positions in the middle of the third conveying structure 41 respectively, the brush wheels of the brush grinding machine are prevented from being consumed too fast due to the same positions of the brush grinding machine, the product quality is improved, and the first push plate structure 22 and the second push plate structure 42 are consistent in structure.

As shown in fig. 1 to 3, the first conveying structure 21 includes a plurality of rollers 211, the rollers 211 are disposed at intervals along the passing direction of the PCB, the axis of the roller 211 is parallel to the horizontal direction, and two ends of the roller 211 are rotatably disposed on the extension portion 12. One end of the roller 211 is coaxially provided with a first pulley 212, and the first pulley 212 is located outside the extension 12, so that the first pulley 212 is provided in plurality, and a first belt 215 is wound around the plurality of first pulleys 212. Wherein, a roller 211 close to the steering mechanism 3 is also coaxially provided with a second belt pulley 213, the second belt pulley 213 and the first belt pulley 212 are positioned at the same end of the roller 211, the extension part 12 is provided with a first motor 217, the first motor 217 is fixedly arranged at the inner side of the extension part 12, the output shaft of the first motor 217 horizontally penetrates through the outer side of the extension part 12 and is fixedly connected with a third belt pulley 214, and a second belt 216 is coiled between the third belt pulley 214 and the second belt pulley 213. When the first motor 217 works, the first motor 217 drives the third belt pulley 214 to rotate through the output shaft, the third belt pulley 214 drives the second belt pulley 213 to rotate through the second belt 216, the second belt pulley 213 drives the coaxial first belt pulley 212 to rotate, then the first belt pulley 212 drives the first belt pulleys 212 to rotate simultaneously through the first belt 215, so that the rollers 211 rotate simultaneously, and the rollers 211 are conveyed to the PCB.

As shown in fig. 1 to fig. 3, the first push plate structure 22 includes two parallel guide rails 221 arranged transversely and two sliding seats 222 sliding on the two guide rails 221, the length direction of the guide rails 221 is parallel to the horizontal direction, two ends of the guide rails 221 are respectively fixed on the inner side walls of two sides of the extension portion 12, and both the two guide rails 221 penetrate through the two sliding seats 222. Two inner side walls of the extension portion 12 are respectively provided with one installation table 23, two fourth belt pulleys 226 and two fifth belt pulleys 227 are respectively arranged on the two installation tables 23, the fourth belt pulleys 226 and the fifth belt pulleys 227 are rotatably arranged on the installation tables 23, the axial directions of the fourth belt pulleys 226 and the fifth belt pulleys 227 are parallel to the vertical direction, the fourth belt pulleys 226 and the fifth belt pulleys 227 on the two installation tables 23 correspond to each other in the length direction of the guide rail 221 one by one, a third belt 228 is wound between the fourth belt pulleys 226 and the fifth belt pulleys 227, so that the third belt 228 is provided with two, and the two third belts 228 are respectively fixedly connected with the two sliding seats 222 through a fixing plate 220. The bottom of one of the mounting tables 23 is further provided with two second motors 229, the second motors 229 and the fourth belt pulleys 226 are arranged on the same mounting table 23, and output shafts of the two first motors 217 vertically penetrate through the mounting table 23 and are respectively fixedly connected with the two fourth belt pulleys 226. The top of the two sliding seats 222 is provided with two vertical supporting rods 225 at intervals, the supporting rods 225 penetrate through a gap between the two rollers 211, and a first push plate 223 and a second push plate 224 are fixedly arranged between the top of the two supporting rods 225 of the two sliding seats 222 respectively, so that the first push plate 223 and the second push plate 224 are both positioned above the rollers 211. When the two second motors 229 rotate, the two fourth belt pulleys 226 are driven to rotate, so that the third belt 228 moves between the fourth belt pulley 226 and the fifth belt pulley 227, the two third belt 228 respectively drives the two sliding seats 222 to move on the two guide rails 221, and the two sliding seats 222 respectively drive the first push plate 223 and the second push plate 224 to move, so that the first push plate 223 and the second push plate 224 can displace the PCB.

As shown in fig. 4 and 5, the steering mechanism 3 includes a second conveying structure 31 and a rotating disc 32, the second conveying structure 31 includes a plurality of rotating levers 33, the plurality of rotating levers 33 are arranged at intervals along the traveling direction of the PCB, the axes of the rotating levers 33 are parallel to the horizontal direction, both ends of the rotating levers 33 are respectively rotatably arranged on the main body portion 11, a plurality of rollers 331 are coaxially arranged on each rotating lever 33, and the rollers 331 rotate along with the rotating levers 33. One end of the rotating rod 33 is coaxially provided with a sixth belt pulley 332, the sixth belt pulley 332 is located on the outer side of the main body portion 11, a fourth belt 335 is wound on the plurality of sixth belt pulleys 332, one end of one of the rotating rods 33 is further provided with a seventh belt pulley 333, the seventh belt pulley 333 and the sixth belt pulley 332 are located on the same end of the rotating rod 33, the main body portion 11 is further fixedly provided with a third motor 337, the third motor 337 is located on the inner side of the main body portion 11, an output shaft of the third motor 337 horizontally penetrates through the outer side of the main body portion 11 and is fixedly connected with an eighth belt pulley 334, and a fifth belt 336 is wound between the eighth belt pulley 334 and the seventh belt pulley 333. When the third motor 337 works, the eighth belt pulley 334 is driven to rotate, the eighth belt pulley 334 drives the seventh belt pulley 333 to rotate through the fifth belt 336, the seventh belt pulley 333 drives the coaxial sixth belt pulley 332 to rotate, the sixth belt pulley 332 drives the plurality of sixth belt pulleys 332 to rotate through the fourth belt 335, so that the plurality of rotating rods 33 rotate, and the roller 331 rotates and conveys the PCB.

As shown in fig. 4 and 5, the rotary plate 32 is in a disk shape, the rotary plate 32 is positioned above the rotating rod 33, and a plurality of holes for the rollers 331 to protrude are formed in the rotary plate 32, so that the rotary plate 32 does not affect the transportation of the PCB by the rollers 331. A vertical rotating shaft 34 is fixedly connected to the bottom of the rotating disc 32, and the axis of the rotating shaft 34 is collinear with the axis of the rotating disc 32. The lifting frame 35 is movably arranged in the main body part 11, the rotating shaft 34 is rotatably arranged on the lifting frame 35, a cross beam is further arranged in the main body part 11, the lifting cylinder 36 is fixedly arranged on the cross beam, and a telescopic rod of the lifting cylinder 36 vertically upwards is fixedly connected with the bottom of the lifting frame 35. The lifting frame 35 is fixedly provided with a fourth motor 37, an output shaft of the fourth motor 37 is vertically upward and fixedly connected with a driving gear 38, the driving gear 38 is coaxial with the output shaft of the fourth motor 37, a driven gear 39 is coaxially arranged on the rotating shaft 34, and the driven gear 39 is meshed with the driving gear 38. When the PCB passes through the second conveying structure 31, the lifting cylinder 36 pushes the lifting frame 35 upwards, the lifting frame 35 drives the rotating shaft 34 and the rotating disc 32 to rise, so that the rotating disc 32 lifts the PCB, then the fourth motor 37 works to rotate the driving gear 38, the driving gear 38 drives the driven gear 39 to rotate, the driven gear 39 drives the rotating shaft 34 to rotate, the rotating shaft 34 drives the rotating disc 32 to rotate, so that the rotating disc 32 drives the PCB to reverse, the rotating disc 32 can reverse the PCB by 90 degrees or 180 degrees, then the telescopic rod of the lifting cylinder 36 is shortened and the rotating disc 32 is lowered, so that the PCB is continuously conveyed forwards under the rotation of the roller 331. The PCB can be brushed in different directions in a plurality of brush mills by reversing the PCB through the steering mechanism 3, so that the expansion and shrinkage of the PCB are reduced, and the product quality is improved.

The implementation principle of the embodiment is as follows: the rollers 211 on the centering mechanism 2 convey the PCB to the steering mechanism 3, and during this process, the first push plate 223 and the second push plate 224 on the centering mechanism 2 push and move the PCB to the central position of the rollers 211, so that the PCB enters the steering mechanism 3 from the central position; the rotating disc 32 of the steering mechanism 3 is lifted under the action of the lifting cylinder 36 so as to lift or lower the PCB, and in addition, the rotating disc 32 is rotated by 90 degrees or 180 degrees under the action of the fourth motor 37 so as to reverse the PCB; the roller 211 on the sequence mechanism 4 conveys the reversed PCB to the next brushing machine, and the first push plate 223 and the second push plate 224 on the sequence mechanism 4 can respectively move the PCB to the left side of the roller 211, the right side of the roller 211 or the center of the roller 211, so that the brush wheel of the brushing machine is prevented from being consumed too fast due to the same position of brushing; can carry out the switching-over to the PCB circuit board through this PCB circuit board commutator for the PCB circuit board can receive the brush that grinds of equidirectional on many brush mills, reduces the condition that the harmomegathus appears in the PCB circuit board, thereby promotes the product quality.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a PCB circuit board commutator which characterized in that: including organism (1), the length direction of organism (1) is unanimous with the walking warp direction of PCB board circuit board, the walking warp direction along PCB circuit board on organism (1) is including in proper order:

a centering mechanism (2), wherein the centering mechanism (2) comprises a first conveying structure (21) and first push plate structures (22) arranged on two sides of the first conveying structure (21);

a steering mechanism (3), wherein the steering mechanism (3) comprises a second conveying structure (31) and a rotary disc (32) capable of ascending and descending;

the sequencing mechanism (4) comprises a third conveying structure (41) and second push plate structures (42) arranged on two sides of the third conveying structure (41).

2. The PCB commutator of claim 1, wherein: the first conveying structure (21) is consistent with the third conveying structure (41), the first conveying structure (21) comprises a plurality of rollers (211), the rollers (211) are arranged at intervals along the length direction of the machine body (1), and a first transmission structure is arranged among the rollers (211).

3. The PCB commutator of claim 2, wherein: first drive structure establishes first belt (215) on a plurality of first belt pulleys (212) including setting up first belt pulley (212) and the book in roller (211) one end, one of them roller (211) one end still is provided with second belt pulley (213), be provided with first motor (217) on organism (1), the output shaft of first motor (217) is provided with third belt pulley (214), it is equipped with second belt (216) to roll up between second belt pulley (213) and third belt pulley (214).

4. The PCB circuit board commutator of claim 3, wherein: first push pedal structure (22) and second push pedal structure (42) are unanimous, first push pedal structure (22) including transversely set up two parallel rail (221) of roller (211) below, two slides (222) of setting on two guide rail (221) and set up first push pedal (223) and second push pedal (224) on two slides (222) respectively, two slide (222) remove through setting up two second transmission structure on organism (1) respectively, first push pedal (223) and second push pedal (224) are connected with two slides (222) through vertical branch (225) respectively, first push pedal (223) and second push pedal (224) all are located the top of roller (211).

5. The PCB circuit board commutator of claim 4, wherein: the second transmission structure comprises a fourth belt pulley (226) and a fifth belt pulley (227), the fourth belt pulley (226) and the fifth belt pulley (227) are respectively arranged on two sides of the top of the machine body (1), a third belt (228) is wound between the fourth belt pulley (226) and the fifth belt pulley (227), the fourth belt pulley (226) is driven by a second motor (229), and each third belt (228) is connected with one sliding seat (222) through a fixing plate (220).

6. The PCB commutator of claim 1, wherein: second transport structure (31) include many dwang (33), many the length direction interval setting of organism (1) is followed in dwang (33), coaxial a plurality of gyro wheels (331) that are provided with on dwang (33), many be provided with third transmission structure between dwang (33).

7. The PCB circuit board commutator of claim 6, wherein: third transmission structure establishes fourth belt (335) on a plurality of sixth belt pulleys (332) including setting up sixth belt pulley (332) and the book in dwang (33) one end, one of them the one end of dwang (33) still is provided with seventh belt pulley (333), be provided with third motor (337) on organism (1), the output shaft of third motor (337) has eighth belt pulley (334), it is equipped with fifth belt (336) to roll up between seventh belt pulley (333) and eighth belt pulley (334).

8. The PCB circuit board commutator of claim 7, wherein: the rotating disc (32) is arranged above the rotating rod (33), a hole for enabling the roller (331) to protrude and expose is formed in the rotating disc (32), and a vertical rotating shaft (34) is connected to the bottom of the rotating disc (32);

a lifting frame (35) is arranged in the machine body (1), the rotating shaft (34) is rotatably arranged on the lifting frame (35), and the bottom of the lifting frame (35) is connected with a lifting cylinder (36);

be provided with fourth motor (37) on crane (35), the output shaft of fourth motor (37) has drive gear (38), be connected with driven gear (39) on pivot (34), drive gear (38) and driven gear (39) meshing.