CN112623978A

CN112623978A - Quick-parking non-shaking rotating device

Info

Publication number: CN112623978A
Application number: CN202011471699.1A
Authority: CN
Inventors: 赵云; 曾宁春; 刘佳斌; 罗斌飞; 晏勇斌; 陈东标
Original assignee: Jiangxi Zhongtian Intelligent Equipment Co Ltd
Current assignee: Jiangxi Zhongtian Intelligent Equipment Co Ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-04-09
Anticipated expiration: 2040-12-15
Also published as: CN112623978B

Abstract

The invention belongs to the field of crane turning devices, and particularly relates to a quick parking swing-free turning device which comprises a base, a rotating seat, a bearing column, a sealing cover, an electric motor, a cylindrical block, a swing limiting column, a spring B and a rotating shaft C, wherein the base fixedly arranged on a chassis of a crane is provided with a conical groove, and the rotating seat driven by the electric motor is rotatably matched in the conical groove; the rotating base is pressed and sealed in the conical groove through the sealing cover arranged on the base through the bolt, and the three swing limiting columns are respectively inserted into the three arc-shaped grooves at the bottom in the base when the suspension arm of the crane is in a recovery state, so that the relative swing between the rotating base and the base is limited, the rotating base is prevented from swinging relative to the base due to the sudden change of the traveling speed of the crane under the inertia effect of the suspension arm, and the damage to equipment caused by the relative swing between the rotating base and the base is reduced.

Description

Quick-parking non-shaking rotating device

Technical Field

The invention belongs to the field of crane rotating devices, and particularly relates to a rotating device capable of parking quickly and free of shaking.

Background

The boom of a conventional crane is mounted on a swivel device so that the boom can hoist the objects around the crane.

The crane is used for a long time, the slewing device on the crane can generate a large movable gap due to abrasion or stress deformation, and under the recovery state of the suspension arm, when the crane is quickly started and accelerated or is quickly stopped, the slewing device can generate shaking relative to a crane body under the inertia effect of the heavy suspension arm, and the shaking can aggravate the abrasion and the deformation of the slewing device, so that the safety of the crane in the use process is reduced, and the service life of the crane is shortened.

Therefore, it is necessary to design a swing device to prevent the swing of the worn or deformed swing device with respect to the car body when the crane is rapidly started or suddenly stopped.

The invention designs a slewing gear capable of parking quickly and free of shaking, and solves the problems.

Disclosure of Invention

In order to solve the defects in the prior art, the invention discloses a slewing device for fast parking without shaking, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, or be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A quick parking swing-free slewing device comprises a base, a rotary seat, a bearing column, a sealing cover, an electric motor, a cylindrical block, a swing limiting column, a spring B and a rotating shaft C, wherein the base fixedly arranged on a crane chassis is provided with a conical groove, and the rotary seat driven by the electric motor is rotatably matched in the conical groove; the rotating seat is pressed and sealed in the conical groove through a sealing cover arranged on the base through a bolt; a supporting column at the upper end of the rotating seat penetrates through the circular groove B at the top of the sealing cover and is in sealed rotating fit with the inner wall of the circular groove B; the upper end of the bearing column is provided with a bearing plate for hinging the suspension arm and installing the control chamber, and a rotating shaft C arranged at the vertical swing center of the suspension arm of the crane is in rotating fit with two supports B arranged on the bearing plate.

A cylindrical block is vertically slid in a cylindrical chute on the bearing column, and a spring B for resetting the cylindrical block is arranged; three limit shaking columns which are uniformly arranged at the lower end of the cylindrical block in the circumferential direction respectively penetrate through three circular grooves A at the bottom of the sliding groove and are correspondingly matched with three arc-shaped grooves at the bottom of the conical groove.

When the suspension arm of the crane is in a recovery state, the cylindrical block drives the three shaking limiting columns to be respectively inserted into the three arc-shaped grooves in the base under the reset action of the spring B so as to prevent the rotary seat from shaking relative to the base due to sudden change of the traveling speed of the crane under the inertia action of the suspension arm; when the suspension arm of the crane is driven by the rotating base to firstly horizontally rotate and then upwards swing in a recovery state, the rotating base drives the three swing limiting columns to respectively and quickly separate from the corresponding arc-shaped grooves before the three swing limiting columns respectively move around the central axis of the rotating base to the limit positions of the corresponding arc-shaped grooves; when the suspension arm swings upwards firstly in a recovery state and then horizontally rotates under the driving of a rotating rotary seat, the rotating shaft C rotating along with the suspension arm drives the three swing limiting columns to respectively and quickly separate from the corresponding arc-shaped grooves; the two ways of driving the shaking limiting column to be separated from the arc-shaped groove quickly do not interfere with each other.

As a further improvement of the technology, the conical groove of the base is provided with a conical surface A, and a plurality of balls which are in rolling fit with the conical surface B on the rotating seat are uniformly and densely distributed on the conical surface A in the circumferential direction, so that the friction between the rotating seat and the base is effectively reduced, and the abrasion between the rotating seat and the base is further delayed. The sealing cover is internally provided with a conical surface D, and a plurality of balls which are in rolling fit with the conical surface C on the rotating seat are uniformly and densely distributed on the conical surface D in the circumferential direction, so that the friction between the rotating seat and the sealing cover is effectively reduced, and the abrasion between the rotating seat and the sealing cover is further delayed. The spring B is positioned in the annular accommodating groove at the upper end of the conical block. The holding tank provides the support for the spring B who is in compression state on the one hand, prevents that spring B from losing efficacy because of taking place the bending in compression deformation process, and on the other hand provides accommodation space for spring B, reduces the space of cylinder piece top in the spout, and then furthest reduces the height of bearing post. One end of the spring B is connected with the bottom of the accommodating groove, and the other end of the spring B is connected with the top in the sliding groove; and a rotary sealing structure is arranged between the bearing column and the inner wall of the circular groove B.

As a further improvement of the technology, a rotating shaft B is rotationally matched on the sealing cover, and a rotary sealing structure is arranged between the rotating shaft B and the sealing cover; a spur gear is arranged on the rotating shaft B and is meshed with a gear ring A arranged on the rotating seat; a rotating shaft A is rotatably matched on a support A arranged on the base, a bevel gear C is arranged on the rotating shaft A, and the bevel gear C is meshed with a bevel gear D arranged on the rotating shaft B; the electric motor is arranged on the base, and a bevel gear A arranged on an output shaft A of the electric motor is meshed with a bevel gear B arranged on a rotating shaft A.

As a further improvement of the technology, a ring sleeve A is rotationally matched on the sealing cover, a gear ring B is arranged on the ring sleeve A, and the gear ring B is meshed with a bevel gear E arranged on an output shaft B of the electric motor; a ring sleeve B with the same central axis is fixedly arranged on the inner wall of the ring sleeve A, and a horizontal shifting pin arranged on the side wall of the cylindrical block passes through the movable groove A on the side wall of the bearing column to be matched with the inverted trapezoidal driving groove B at the upper end of the ring sleeve B and the upper end face of the ring sleeve B; an arc-shaped block which can be filled in the driving groove B is vertically matched on the ring sleeve B in a sliding manner; a spring A for resetting the arc-shaped block is arranged on the ring sleeve B; the lower end of the arc-shaped block is provided with a vertical driving rod, and the driving plate is matched with an inverted triangle driving groove A on the sealing cover below and the upper end face of the sealing cover.

As a further improvement of the technology, the bottom of the driving groove B is provided with a movable groove D, and the bottom of the movable groove D is provided with a circular groove C; the arc-shaped block is vertically movable in the movable groove D, and a plurality of guide teeth which are symmetrically distributed at two ends of the arc-shaped block respectively slide in a plurality of guide grooves on the inner wall of the driving groove B. The guide groove and the guide teeth are matched to play a role in positioning and guiding the motion of the arc-shaped block, and meanwhile, the guide teeth and the arc-shaped block can be integrally filled into the driving groove B completely. A circular groove D is formed in the lower end face of the arc-shaped block, and the driving rod is installed in the circular groove D and penetrates through the circular groove C to be matched with a driving groove A below the driving rod; the spring A is nested on the driving rod and is positioned in the circular groove D; one end of the spring A is connected with the bottom of the movable groove D, and the other end of the spring A is connected with the top of the circular groove D. The circular groove D provides accommodating space for the spring A, reduces the space occupied by the spring A due to installation outside the arc-shaped block, reduces the distance between the ring sleeve B and the top of the sealing cover, and makes the structure of the sealing cover more compact. The spring A is an extension spring and is always in an extension state; the sealing cover is provided with a trapezoidal guide ring which rotates in a trapezoidal ring groove on the inner wall of the ring sleeve A. The matching of the trapezoidal guide ring and the trapezoidal ring groove plays a positioning and guiding role for the rotation of the ring sleeve A on the sealing cover.

As a further improvement of the technology, a crank perpendicular to the rotating shaft C is installed on the rotating shaft C, and the tail end of the crank is connected with the upper end of the cylindrical block through a telescopic rod; two ends of the telescopic rod are respectively hinged with the crank and the cylindrical block; and a spring C for stretching and retracting the telescopic rod are arranged in the telescopic rod.

As a further improvement of the technology, the telescopic rod consists of an outer sleeve and an inner rod which are sleeved with each other; a sliding block arranged at one end of the inner rod slides in a sliding groove C on the inner wall of the outer sleeve; the spring C and the spring D are respectively positioned on two sides of the sliding block; the spring C and the spring D are always in a compression energy storage state; the telescopic rod is movably arranged in a movable groove B at the top of the bearing column and a movable groove C on the bearing plate.

As a further improvement of the technology, the speed of the electric motor driving the ring sleeve A to rotate is higher than the speed of the electric motor driving the rotating seat to rotate, the rotating direction of the rotating seat is opposite to the rotating direction of the ring sleeve A, and when the suspension arm of the crane is driven by the rotating seat to firstly horizontally rotate from a recovery state, the rotating seat drives the three swing limiting columns to respectively move on the horizontal arcs of the corresponding arc-shaped grooves. Because the speed of the electric motor driving the ring sleeve A to rotate is higher than the speed of the electric motor driving the rotating base to rotate, and the rotating direction of the rotating base is opposite to the rotating direction of the ring sleeve A, the ring sleeve A drives the ring sleeve B to rotate at a higher speed relative to the shifting pin, so that the shifting pin rapidly crosses the driving groove B before the three limit shaking columns respectively reach the limit positions of the corresponding arc-shaped grooves, and drives the three limit shaking columns to separate from the corresponding arc-shaped grooves through the cylindrical block, and interference is not formed on the continuous rotation of the rotating base.

Compared with the traditional crane turning device, the three swing limiting columns are respectively inserted into the three arc-shaped grooves at the bottom in the base when the suspension arm of the crane is in a recovery state, and limit the relative swing between the rotating seat and the base, so that the rotating seat is prevented from swinging relative to the base due to the sudden change of the traveling speed of the crane under the inertia effect of the suspension arm, and the damage to equipment caused by the relative swing between the rotating seat and the base is reduced.

The revolving block rotating relative to the base drives three limit shaking columns to rapidly separate from three arc-shaped grooves on the base through a series of transmission and drives a rotating shaft C by the upper-swing suspension arm to drive two unlocking modes of three limit shaking columns to rapidly separate from three arc-shaped grooves on the base to the relative swing limit of the revolving block and the base through a series of transmission, and no matter which unlocking mode fails, the unlocking effect of the other unlocking mode when the revolving block starts to rotate from an initial state and the unlocking effect when the suspension arm is completely recovered can not be influenced.

The rotating base rotating relative to the base drives the three shaking limiting columns to be quickly separated from the three arc-shaped grooves on the base through a series of transmission, and the rotating shaft C driven to rotate by the upward swinging suspension arm drives the three shaking limiting columns to be quickly separated from the three arc-shaped grooves on the base through a series of transmission, so that two unlocking modes for limiting the relative swinging of the rotating base and the base play a role together, and the crane can be ensured to be locked only after the crane suspension arm is completely recovered.

The invention has simple structure and better use effect.

Drawings

Fig. 1 is a schematic cross-sectional view of the invention in cooperation with a crane and a boom.

Fig. 2 is an overall sectional view of the present invention.

FIG. 3 is a cross-sectional view of the base, the rotary seat, the sealing cover, the ring cover A and the ring cover B.

FIG. 4 is a schematic cross-sectional view of the cylindrical block, the telescopic rod, the rotating shaft C and the suspension arm.

FIG. 5 is a schematic cross-sectional view of the electric motor, bevel gear A, bevel gear B, rotation shaft A, bevel gear C, bevel gear D, rotation shaft B, spur gear, gear ring A and rotary base.

FIG. 6 is a cross-sectional view of the rotary seat, spring B, cylindrical block, shifting pin, arc block, driving rod sealing cover and ring cover A.

Fig. 7 is a schematic cross-sectional view of the matching of the driving rod of the shifting pin and the arc-shaped block and the driving groove A on the sealing cover.

Fig. 8 is a schematic cross-sectional view of a base and its base.

FIG. 9 is a schematic cross-sectional view of the rotation seat and the supporting plate.

Figure 10 is a schematic cross-sectional view of a sealing cap and its two views.

Fig. 11 is a schematic cross-sectional view of a cylindrical block engaged with a sway brace.

Figure 12 is a schematic view of a cuff a and its cross-section.

Fig. 13 is a schematic cross-sectional view of a cuff B.

Fig. 14 is a schematic cross-sectional view of an arcuate block engaged with a drive rod.

Figure 15 is a schematic cross-sectional view of the jacket.

Number designation in the figures: 1. a crane; 2. a support frame; 5. a base; 6. a conical groove; 7. a conical surface A; 8. a ball bearing; 11. an arc-shaped slot; 12. a rotating base; 13. a conical surface B; 14. a conical surface C; 15. a support post; 16. a chute; 17. a circular groove A; 18. a movable groove A; 19. a movable groove B; 20. a support plate; 21. a movable groove C; 22. a sealing cover; 23. a conical surface D; 25. a circular groove B; 26. a driving groove A; 28. a trapezoidal guide ring; 29. a rotary seal structure; 30. a gear ring A; 31. a spur gear; 32. a rotating shaft B; 34. a bevel gear D; 35. a bevel gear C; 36. a rotating shaft A; 37. a support A; 38. a bevel gear B; 39. a bevel gear A; 40. an electric motor; 41. a bevel gear E; 42. a gear ring B; 43. a ring sleeve A; 44. a trapezoidal ring groove; 45. a ring sleeve B; 46. a movable groove D; 47. a driving groove B; 48. a guide groove; 49. a circular groove C; 50. an arc-shaped block; 51. a circular groove D; 52. a guide tooth; 53. a drive rod; 54. a spring A; 55. pulling a pin; 56. a cylindrical block; 57. accommodating grooves; 58. a sway limiting column; 59. a spring B; 60. a telescopic rod; 61. a jacket; 62. a chute C; 63. an inner rod; 64. a slider; 65. a spring C; 66. a spring D; 67. a crank; 68. a rotating shaft C; 69. a support B; 70. a suspension arm; 71. a hydraulic cylinder; 72. an operation chamber; 73. a bolt; 74. an output shaft A; 75. and an output shaft B.

Detailed Description

The drawings are schematic illustrations of the implementation of the present invention to facilitate understanding of the principles of structural operation. The specific product structure and the proportional size are determined according to the use environment and the conventional technology.

As shown in fig. 2, it includes the base 5, the swivel base 12, the bearing pillar 15, the sealed lid 22, the electric motor 40, the cylinder block 56, limit and shake the pillar 58, the spring B59, the spindle C68, wherein as shown in fig. 1, 2, 8, the base 5 that is fixed on the chassis of the crane 1 has a conical groove 6, cooperate with the swivel base 12 driven by the electric motor 40 in the conical groove 6 rotatably; as shown in fig. 2 and 3, the sealing cover 22 mounted on the base 5 through the bolt 73 presses and seals the rotary seat 12 in the conical groove 6; as shown in fig. 3, 9 and 10, the supporting column 15 at the upper end of the rotary seat 12 passes through the circular groove B25 at the top of the sealing cover 22 and is in sealing and rotating fit with the inner wall of the circular groove B25; as shown in fig. 1, 2 and 4, a support plate 20 for hinging the boom 70 and mounting the cab is mounted on the upper end of the support column 15, and a rotating shaft C68 mounted at the center of the vertical swing of the boom 70 of the crane 1 is rotatably engaged with two supports B69 mounted on the support plate 20.

As shown in fig. 3, 6 and 9, a cylindrical block 56 vertically slides in the cylindrical chute 16 on the bearing column 15, and a spring B59 for restoring the cylindrical block 56 is installed; as shown in fig. 8 and 11, the three shaking-limiting columns 58 uniformly installed at the lower end of the cylindrical block 56 in the circumferential direction respectively penetrate through the three circular grooves a17 at the bottom of the sliding groove 16 and are correspondingly matched with the three arc-shaped grooves 11 at the bottom of the conical groove 6.

As shown in fig. 1 and 2, when the boom 70 of the crane 1 is in the recovery state, the cylindrical block 56 drives the three swing-limiting columns 58 to be inserted into the three arc-shaped grooves 11 in the base 5 respectively under the restoring action of the spring B59, so as to prevent the swivel base 12 from swinging relative to the base 5 due to sudden change of the traveling speed of the crane 1 under the inertia action of the boom 70; when the boom 70 of the crane 1 is driven by the rotating base 12 to firstly horizontally rotate and then upwards swing in a recovery state, the rotating base 12 drives the three swing limiting columns 58 to respectively and rapidly separate from the corresponding arc-shaped grooves 11 before the three swing limiting columns 58 respectively move around the central axis of the rotating base 12 to the limit positions of the corresponding arc-shaped grooves 11; when the boom 70 swings upwards from the recovery state and then horizontally rotates under the driving of the rotating rotary base 12, the rotating shaft C68 rotating along with the boom 70 drives the three swing limiting posts 58 to respectively and rapidly separate from the corresponding arc-shaped grooves 11; the two ways of driving the slosh limiting post 58 to quickly disengage from the arcuate slot 11 do not interfere with each other.

As shown in fig. 3 and 8, the tapered groove 6 of the base 5 has a tapered surface a7, and a plurality of balls 8 which are in rolling fit with the tapered surface B13 on the rotating seat 12 are uniformly and densely distributed on the tapered surface a7 in the circumferential direction, so that the friction between the rotating seat 12 and the base 5 is effectively reduced, and further, the abrasion between the rotating seat 12 and the base 5 is delayed. As shown in fig. 3 and 10, the sealing cover 22 has a tapered surface D23 therein, and a plurality of balls 8 which are in rolling fit with the tapered surface C14 on the rotary seat 12 are uniformly and densely distributed on the tapered surface D23 in the circumferential direction, so that the friction between the rotary seat 12 and the sealing cover 22 is effectively reduced, and further, the abrasion between the rotary seat 12 and the sealing cover 22 is delayed. As shown in fig. 3, 6 and 11, the spring B59 is located in an annular receiving groove 57 at the upper end of the conical block. The receiving groove 57 provides support for the spring B59 in a compressed state, preventing the spring B59 from failing due to bending during compression deformation, and provides a receiving space for the spring B59, so as to reduce the space above the cylindrical block 56 in the sliding groove 16, thereby minimizing the height of the support post 15. One end of the spring B59 is connected with the bottom of the accommodating groove 57, and the other end is connected with the top in the sliding groove 16; and a rotary sealing structure 29 is arranged between the supporting column 15 and the inner wall of the circular groove B25.

As shown in fig. 5, a rotating shaft B32 is rotatably fitted on the sealing cover 22, and a rotary sealing structure 29 is installed between the rotating shaft B32 and the sealing cover 22; a spur gear 31 is arranged on the rotating shaft B32, and the spur gear 31 is meshed with a gear ring A30 arranged on the rotating base 12; a rotating shaft A36 is rotatably matched with a support A37 arranged on the base 5, a bevel gear C35 is arranged on the rotating shaft A36, and the bevel gear C35 is meshed with a bevel gear D34 arranged on the rotating shaft B32; the electric motor 40 is mounted on the base 5, and a bevel gear A39 mounted on an output shaft A74 of the electric motor 40 meshes with a bevel gear B38 mounted on a rotating shaft A36.

As shown in fig. 3 and 5, a ring sleeve a43 is rotatably fitted on the sealing cover 22, a ring gear B42 is mounted on the ring sleeve a43, and the ring gear B42 is meshed with a bevel gear E41 mounted on an output shaft B75 of the electric motor 40; as shown in fig. 6, 7 and 13, a ring sleeve B45 with the same central axis is fixedly arranged on the inner wall of the ring sleeve a43, and a horizontal shifting pin 55 arranged on the side wall of the cylindrical block 56 passes through a movable groove a18 on the side wall of the support column 15 to be matched with an inverted trapezoidal driving groove B47 at the upper end of the ring sleeve B45 and the upper end surface of the ring sleeve B45; the ring sleeve B45 is vertically and slidably matched with an arc-shaped block 50 which can fill the driving groove B47; a spring A54 for resetting the arc block 50 is arranged on the ring sleeve B45; as shown in fig. 6, 7 and 10, the arc block 50 is provided at its lower end with a vertical driving rod 53 which engages with an inverted triangular driving groove a26 of the lower sealing cover 22 and the upper end surface of the sealing cover 22.

As shown in fig. 13, the bottom of the driving groove B47 is provided with a movable groove D46, and the bottom of the movable groove D46 is provided with a circular groove C49; as shown in fig. 6 and 7, the arc-shaped block 50 is vertically movable in the movable groove D46; as shown in fig. 6, 13 and 14, the guide teeth 52 symmetrically distributed at both ends of the arc block 50 slide in the guide grooves 48 on the inner wall of the driving groove B47, respectively. The cooperation of the guide slot 48 and the guide tooth 52 provides a positioning guide for the movement of the arc block 50, and the guide tooth 52 and the arc block 50 together can completely fill the driving slot B47. A circular groove D51 is formed in the lower end face of the arc-shaped block 50, and the driving rod 53 is installed in the circular groove D51 and penetrates through the circular groove C49 to be matched with a driving groove A26 below; the spring A54 is nested on the driving rod 53 and is positioned in the circular groove D51; the spring A54 has one end connected to the bottom of the movable slot D46 and the other end connected to the top of the circular slot D51. The circular groove D51 provides a containing space for the spring A54, reduces the space occupied by the spring A54 due to the installation outside the arc-shaped block 50, and reduces the distance between the ring sleeve B45 and the top of the sealing cover 22, so that the structure is more compact. The spring A54 is an extension spring and is always in an extension state; as shown in fig. 5, 6 and 12, the sealing cover 22 is provided with the trapezoidal guide ring 28, and the trapezoidal guide ring 28 rotates in the trapezoidal ring groove 44 on the inner wall of the ring sleeve a 43. The cooperation of the guide ring 28 and the annular groove 44 serves as a guide for the rotation of the ring cover A43 on the sealing cover 22.

As shown in fig. 2 and 4, a crank 67 perpendicular to the rotating shaft C68 is installed on the rotating shaft C68, and the tail end of the crank 67 is connected with the upper end of the cylindrical block 56 through an expansion link 60; the two ends of the telescopic rod 60 are respectively hinged with the crank 67 and the cylindrical block 56; the telescopic rod 60 is internally provided with a spring C65 and a spring C65 which can telescopically reset the telescopic rod.

As shown in fig. 4 and 15, the telescopic rod 60 is composed of an outer sleeve 61 and an inner rod 63 which are sleeved with each other; a slide block 64 mounted at one end of the inner rod 63 slides in the chute 16C on the inner wall of the outer sleeve 61; the spring C65 and the spring D66 are respectively positioned at two sides of the sliding block 64; the spring C65 and the spring D66 are always in a compression energy storage state; the telescopic rod 60 is movably arranged in a movable groove B19 at the top of the bearing post 15 and a movable groove C21 on the bearing plate 20.

As shown in fig. 5, the speed of the electric motor 40 driving the ring cover a43 to rotate is greater than the speed of the electric motor 40 driving the rotating base 12 to rotate, the rotating direction of the rotating base 12 is opposite to the rotating direction of the ring cover a43, and when the boom 70 of the crane 1 is driven by the rotating base 12 to perform horizontal rotation from the retracted state, the rotating base 12 drives the three swing-limiting pillars 58 to perform horizontal arc motion in the corresponding arc-shaped slots 11. Since the speed of the electric motor 40 driving the ring cover a43 to rotate is higher than the speed of the electric motor 40 driving the rotary base 12 to rotate, and the rotation direction of the rotary base 12 is opposite to the rotation direction of the ring cover a43, the ring cover a43 drives the ring cover B45 to rotate at a higher speed relative to the pulling pin 55, so that the pulling pin 55 rapidly goes out of the driving groove B47 before the three shaking limit posts 58 reach the limit positions of the corresponding arc-shaped grooves 11 respectively and drives the three shaking limit posts 58 to be separated from the corresponding arc-shaped grooves 11 through the cylindrical block 56 without interfering with the continuous rotation of the rotary base 12.

The rotary seal structure 29 in the present invention is a conventional one.

The electric motor 40 of the present invention is known in the art.

The working process of the invention is as follows: in the initial state, the boom 70 of the crane 1 is located on the support frame 2 and is in a horizontal recovery state, the three sway limiting columns 58 are respectively inserted into the three arc-shaped grooves 11 in the base 5, and each sway limiting column 58 is located at the middle position of the corresponding arc-shaped groove 11, the relative swing between the rotating base 12 and the base 5 is limited by the cooperation of the three sway limiting columns 58 and the three arc-shaped grooves 11, so that the rotating base 12 is prevented from shaking relative to the base 5 due to the sudden change of the traveling speed of the crane 1 under the inertia effect of the boom 70, and the damage of equipment caused by the relative swing between the rotating base 12 and the base 5 is reduced. The cylindrical block 56 is located at the bottom of the chute 16, and the spring a54 is in a tension energy storage state and the springs B59, C65 and D66 are in a compression energy storage state. The angle between the crank 67 and the telescoping rod 60 is 180 degrees. The lower end of the driving rod 53 is located at the bottom of the driving groove a26, the arc block 50 is located at the bottom of the movable groove D46, the upper end face of the arc block 50 is flush with the bottom of the driving groove B47, and the shifting pin 55 is located in the driving groove B47 and is abutted against the arc block 50.

When the crane 1 needs to be used for hoisting, if the boom 70 of the crane 1 needs to be horizontally rotated and swung from the retracted state and then swung upward around the rotating shaft C68 under the pushing of the hydraulic cylinder 71, the electric motor 40 is started, the electric motor 40 drives the rotating base 12 to rotate relative to the base 5 and the sealing cover 22 through the bevel gear a39, the bevel gear B38, the rotating shaft a36, the bevel gear C35, the bevel gear D34, the rotating shaft B32, the straight gear 31 and the gear ring a30 which are installed on the output shaft a74, the rotating base 12 drives the cylindrical block 56, the shifting pin 55 and the three sway limiting columns 58 to synchronously rotate, and the three sway limiting columns 58 move around the central axis of the base 5 in the corresponding arc-shaped grooves 11 respectively.

Meanwhile, the electric motor 40 drives the ring sleeve a43 and the ring sleeve B45 arranged on the ring sleeve a43 to rotate fast relative to the sealing cover 22 through the bevel gear E41 and the gear ring B42 arranged on the output shaft B75, the rotation direction of the ring sleeve a43 and the ring sleeve B45 is opposite to the rotation direction of the rotating base 12 driving the shifting pin 55 to rotate, and the rotation speed of the ring sleeve a43 and the ring sleeve B45 is larger than the rotation speed of the rotating base 12 driving the shifting pin 55 to rotate, so that the relative rotation speed of the rotating base 12 and the ring sleeve a43 and the ring sleeve is larger, and the shifting pin 55 is enabled to reach the upper end face of the ring sleeve B45 from the bottom of the driving groove B47 on the ring sleeve B45 fast. And then the shifting pin 55 drives the three swing limiting columns 58 to separate from the arc-shaped grooves 11 before reaching the limit positions of the corresponding arc-shaped grooves 11 around the central axis of the base 5 through the cylindrical block 56, and the spring B59 is further compressed to store energy, so that the interference limitation of the matching state of the three swing limiting columns 58 and the three arc-shaped grooves 11 on the horizontal rotation swing of the lifting arm 70 along with the rotating base 12 in the initial state is avoided.

Along with the quick rotation of the ring sleeve B45 relative to the sealing cover 22 driven by the ring sleeve A43, the arc block 50 and the driving rod 53 are driven by the ring sleeve B45 to synchronously and quickly rotate, the lower end of the driving rod 53 quickly moves from the bottom of the driving groove A26 on the sealing cover 22 to the top of the sealing cover 22, the spring A54 is further stretched to store energy, the driving rod 53 drives the arc block 50 to vertically move upwards and quickly and completely fills the notch formed by the driving groove B47 on the upper end surface of the ring sleeve A43, it is ensured that the rotating base 12 with the rotation direction opposite to that of the ring sleeve B45 drives the shifting pin 55 to generate no vertical downward movement when meeting the driving groove B47 on the ring sleeve B45 again before the rotating reset, and the situation that when the horizontal rotation swing of the suspension arm 70 reaches an integral multiple of 120 degrees is avoided, the three swing limiting columns 58 are vertically inserted into the three arc grooves 11 respectively downwards to limit the horizontal swing of.

Because the boom 70 is in a horizontal state, the rotating shaft C68 does not rotate relative to the support B69, the vertical upward movement of the cylindrical block 56 pushes the inner rod 63 and the sliding block 64 of the telescopic rod 60 to contract towards the outer sleeve 61, the spring C65 above the sliding block 64 is further compressed to store energy, the spring D66 below the sliding block 64 releases energy, and the telescopic rod 60 is integrally shortened and swings upwards in a self-adaptive mode by a small angle around the hinge point at the tail end of the crank 67.

When the rotary base 12 rotates to a desired angle relative to the base 5, the electric motor 40 stops operating, and the hydraulic cylinder 71 is started to drive the boom 70 to swing upward at a proper angle around the rotating shaft C68 for hoisting operation. In the process that the boom 70 swings upwards around the rotating shaft C68, the boom 70 drives the rotating shaft C68 to synchronously rotate relative to the support B69, the rotating shaft C68 drives the telescopic rod 60 to swing towards the tail end of the boom 70 around the hinge point at the upper end of the cylindrical block 56 through the crank 67, the inner rod 63 of the telescopic rod 60 extends outwards of the outer sleeve 61 under the reset action of the spring C65 and the spring D66, and the telescopic rod 60 extends in a self-adaptive manner.

When the crane 1 needs to be used for hoisting operation, if the boom 70 of the crane 1 needs to swing upwards around the rotating shaft C68 from the recovery state and then horizontally rotate and swing around the central axis of the base 5, the hydraulic cylinder 71 is started to drive the boom 70 to swing upwards around the rotating shaft C68 by a certain angle, the boom 70 drives the rotating shaft C68 to rotate relative to the support B69, the rotating shaft C68 drives the three swing limiting columns 58 to respectively separate from the three arc-shaped grooves 11 in the base 5 through the crank 67, the telescopic rod 60 and the cylindrical block 56, the spring B59 is further compressed and stored with energy, the telescopic rod 60 generates smaller-amplitude tension under the combined action of the self weight of the cylindrical block 56, the self weight of the three swing limiting columns 58 and the spring B59, the spring C65 releases partial energy, and the spring D66 is further compressed and stored with energy. Meanwhile, the cylindrical block 56 drives the shifting pin 55 to be gradually separated from the driving groove B47 on the ring sleeve B45 vertically and upwards.

When the cylindrical block 56 moves vertically upward in the slide slot 16 to the limit, the spring B59 is compressed to the limit, and the pin 55 is completely disengaged from the driving slot B47 and in a suspended state. With the continuous upward swinging of the boom 70 around the rotating shaft C68, the telescopic rod 60 further extends, the spring C65 further releases energy, the spring D66 further compresses stored energy, the situation that the cylindrical block 56 vertically moving upwards to the limit position swings the boom 70 around the rotating shaft C68 to a higher position is avoided, and the situation that the three swing limiting columns 58 are driven to be separated from the three arc-shaped grooves 11 through a series of transmission in the upward swinging process of the boom 70 around the rotating shaft C68 so as to remove the limitation on the rotation of the rotating base 12 relative to the base 5 and then can continuously swing upwards around the rotating shaft C68 according to the hoisting operation requirement is ensured.

After the boom 70 swings upward by a certain angle around the rotating shaft C68, the electric motor 40 is started, the electric motor 40 drives the rotating base 12 to rotate relative to the base 5 and the sealing cover 22 through the bevel gear A39, the bevel gear B38, the rotating shaft A36, the bevel gear C35, the bevel gear D34, the rotating shaft B32, the straight gear 31 and the gear ring A30 which are arranged on the output shaft A74, and the rotating base 12 drives the cylindrical block 56, the shifting pin 55 and the three shaking limiting columns 58 which are separated from the arc-shaped grooves 11 to synchronously rotate.

Meanwhile, the electric motor 40 drives the ring sleeve a43 and the ring sleeve B45 mounted on the ring sleeve a43 to rotate fast relative to the sealing cover 22 through the bevel gear E41 and the gear ring B42 mounted on the output shaft B75, the rotation direction of the ring sleeve a43 and the ring sleeve B45 is opposite to the rotation direction of the rotating base 12 driving the shifting pin 55 to rotate, and the rotation speed of the ring sleeve a43 and the ring sleeve B45 is greater than the rotation speed of the rotating base 12 driving the shifting pin 55 to rotate, so that the relative rotation speed of the rotating base 12 and the ring sleeve a43 and the ring sleeve is greater.

Along with the rapid rotation of the ring sleeve B45 relative to the sealing cover 22 driven by the ring sleeve A43, the arc-shaped block 50 and the driving rod 53 are driven by the ring sleeve B45 to synchronously and rapidly rotate, the lower end of the driving rod 53 rapidly moves from the bottom of the driving groove A26 on the sealing cover 22 to the top of the sealing cover 22, the spring A54 is further stretched to store energy, the driving rod 53 drives the arc-shaped block 50 to vertically move upwards and rapidly and completely fills the notch formed by the driving groove B47 on the upper end surface of the ring sleeve A43, and when the mode that the suspension arm 70 swings around the rotating shaft C68 to unlock the three swing-limiting columns 58 and the three arc-shaped grooves 11 is failed, the rotating seat 12 with the rotation direction opposite to the ring sleeve B45 drives the shifting pin 55 to meet the driving groove B47 on the ring sleeve B45 again before the rotating reset, so that the vertical downward movement cannot be generated, when the horizontal rotation swing of the suspension arm 70 reaches an integral multiple of 120 degrees, the three swing-limiting columns 58 are respectively inserted into the three arc-shaped grooves 11 vertically and downwards to limit the horizontal rotary swing of the suspension arm 70 along with the rotary base 12.

When the rotary base 12 rotates to a desired angle relative to the base 5, the electric motor 40 stops operating, and the hydraulic cylinder 71 is started to drive the boom 70 to swing upward around the rotating shaft C68 for hoisting operation.

If the way that the boom 70 is driven by the rotating base 12 to horizontally swing from the initial recovery state to unlock the matching state of the three swing limiting columns 58 and the three arc-shaped grooves 11 fails, the hydraulic cylinder 71 can drive the boom 70 to swing upwards around the rotating shaft C68 to unlock the matching state of the three swing limiting columns 58 and the three arc-shaped grooves 11 and complete the horizontal rotation action of the rotating base 12 driving the boom 70.

If the mode that the boom 70 swings upward around the rotating shaft C68 under the driving of the hydraulic cylinder 71 from the initial recovery state to unlock the matching state of the three swing limiting columns 58 and the three arc-shaped grooves 11 fails, the electric motor 40 can drive the rotating base 12 to rotate, and the rotating base 12 drives the boom 70 to horizontally rotate around the central axis of the base 5 to unlock the matching state of the three swing limiting columns 58 and the three arc-shaped grooves 11 and complete the subsequent hoisting action that the boom 70 swings upward around the rotating shaft C68.

After the lifting operation of the boom 70 of the crane 1 is finished, the boom 70 needs to be recovered and reset, and the boom 70 has two recovery and reset modes:

the first reset mode: the boom 70 is firstly driven by the rotating base 12 which is driven by the electric motor 40 to rotate and reset relative to the base 5 to horizontally rotate around the central axis of the base 5 to the upper part of the supporting frame 2, and then is pulled by the hydraulic cylinder 71 to swing downwards around the rotating shaft C68 to the horizontal state for complete recovery and resetting. During the process of swinging down and resetting the boom arm 70 around the rotating shaft C68, the boom arm 70 in the stretching state performs the contraction and resetting. When boom 70 is fully swung to a horizontal position about pivot axis C68, boom 70 is fully retracted.

When the boom 70 is driven by the rotating base 12 which is driven by the electric motor 40 to rotate and reset relative to the base 5 to horizontally reset and rotate around the central axis of the base 5 towards the upper part of the support frame 2, the electric motor 40 drives the rotating base 12 to rotate reversely relative to the base 5 and the sealing cover 22 through the bevel gear A39, the bevel gear B38, the rotating shaft A36, the bevel gear C35, the bevel gear D34, the rotating shaft B32, the straight gear 31 and the gear ring A30 which are arranged on the output shaft A74, the rotating base 12 drives the cylindrical block 56, the shifting pin 55 and the three shaking limiting columns 58 to synchronously rotate, and the shifting pin 55 which is in a suspended state is positioned above the upper end surface of the ring sleeve B45.

Meanwhile, the electric motor 40 drives the ring sleeve a43 and the ring sleeve B45 arranged on the ring sleeve a43 to rotate fast and reversely relative to the sealing cover 22 through the bevel gear E41 and the gear ring B42 arranged on the output shaft B75, the ring sleeve B45 drives the arc-shaped block 50 and the driving rod 53 to rotate fast and synchronously, the shifting pin 55 approaches to the driving groove B47 on the ring sleeve B45, and the lower end of the driving rod 53 approaches to the driving groove a26 on the sealing cover 22 along the top end of the sealing cover 22. When the shifting pin 55 just reaches the range of the driving groove B47, the lower end of the driving rod 53 just reaches the range of the driving groove A26, and along with the process that the lower end of the driving rod 53 is driven by the ring sleeve B45 to continue moving towards the bottom of the driving groove A26, the driving rod 53 moves towards the bottom of the driving groove A26 along the inclined surface of the driving groove A26 under the reset action of the spring A54. When the rotary base 12 drives the suspension arm 70 to swing back around the central axis of the base 5 to the position right above the supporting frame 2 under the driving of the electric motor 40, the shifting pin 55 just reaches and suspends over the middle of the driving groove B47, the lower end of the driving rod 53 just reaches the bottom of the driving groove A26 at the top end of the sealing cover 22 under the resetting action of the spring A54, the arc-shaped block 50 reaches the bottom of the driving groove B47, and the three swing limiting columns 58 are respectively just opposite to the middle of the three arc-shaped grooves 11 at the bottom in the base 5.

Because the boom 70 is in the swinging-up static state around the rotating shaft C68, in the process that the boom 70 is driven by the rotating base 12 to swing horizontally around the central axis of the base 5 right above the supporting frame 2, the rotating shaft C68 does not rotate relative to the support B69, the telescopic rod 60 is always in the stretching state, the cylindrical block 56 is always located at the upper end limit position in the sliding chute 16, the poking pin 55 is always in the suspension state and does not interact with the upper end surface of the ring sleeve B45 or the driving groove B47, and the three shaking limiting columns 58 are always respectively contracted in the three circular grooves A17 at the bottom of the rotating base 12 and do not limit the rotation of the rotating base 12 relative to the base 5.

When the rotary base 12 drives the boom 70 to rotate relative to the base 5 to a position right above the support frame 2, the electric motor 40 is stopped, and the hydraulic cylinder 71 is started to drive the boom 70 to swing downwards around the rotating shaft C68 to the support frame 2 for complete reset. In the process that the suspension arm 70 swings downwards around the rotating shaft C68, the suspension arm 70 drives the rotating shaft C68 to synchronously and reversely rotate relative to the support B69, the rotating shaft C68 drives the telescopic rod 60 to swing towards the direction away from the tail end of the suspension arm 70 around the hinge point at the upper end of the cylindrical block 56 through the crank 67, the inner rod 63 of the telescopic rod 60 contracts towards the outer sleeve 61 under the reset action of the spring C65 and the spring D66, the telescopic rod 60 shortens in a self-adaptive mode, and the cylindrical block 56 keeps static under the combined action of the spring B59 and the telescopic rod 60. When the telescopic rod 60 is contracted to its original length as the boom 70 swings about the rotation axis C68, the spring C65 and the spring D66 are restored to the original state. With the continuous swinging and resetting of the suspension arm 70, the telescopic rod 60 pushes the cylindrical block 56 to move vertically downwards in the sliding groove 16, the spring B59 releases energy along with the downward movement of the cylindrical block 56, and the driving block drives the three shaking limit columns 58 to be inserted into the middle parts of the three arc-shaped grooves 11 on the base 5 respectively. The cylindrical block 56 drives the shifting pin 55 to move vertically to the bottom of the driving groove B47 on the lower ring sleeve B45.

When the suspension arm 70 swings downwards to the support frame 2 around the rotating shaft C68 to complete resetting, the shifting pin 55 just reaches the bottom of the driving groove B47 and abuts against the arc-shaped block 50, the three swing limiting columns 58 are completely inserted into the three arc-shaped grooves 11 and limit the relative swing of the base 5 and the rotating base 12, so that the rotating base 12 cannot swing relative to the base 5 due to the sudden change of the driving speed of the crane 1 under the inertia effect of the suspension arm 70, the rotating base 12 and the base 5 with increased moving clearance due to long-time use abrasion are prevented from swinging relatively greatly when the speed of the crane 1 is suddenly changed, the damage to equipment due to the relative swing between the rotating base 12 and the base 5 is reduced, and the service life of the equipment is prolonged.

The second reset mode: the boom 70 firstly swings downwards around the rotating shaft C68 to a horizontal state under the pulling of the hydraulic cylinder 71, and then horizontally swings around the central axis of the base 5 to the supporting frame 2 under the driving of the rotating base 12 which is driven by the electric motor 40 to rotate and reset relative to the base 5 so as to perform complete recovery and reset.

The hydraulic cylinder 71 is firstly started to drive the suspension arm 70 to swing downwards around the rotating shaft C68, and the suspension arm 70 drives the rotating shaft C68 to rotate reversely relative to the support B69. At this time, the shifting pin 55 abuts against the upper end surface of the ring sleeve B45 and is not in the range of the driving groove B47 on the ring sleeve B45, the lower end of the driving rod 53 abuts against the upper end surface of the sealing cover 22, and the gap formed by the arc-shaped block 50 to the driving groove B47 is in a filling state, so that the rotating shaft C68 cannot drive the cylindrical block 56 to vertically move downwards in the sliding groove 16 through the crank 67 and the telescopic rod 60, and the three shaking limiting columns 58 are kept in a static state separated from the three arc-shaped grooves 11 on the base 5. As the boom 70 swings down, the rotating shaft C68 compresses the telescopic rod 60 through the crank 67, the spring C65 is further compressed, and the spring D66 releases energy.

When the boom 70 swings to the horizontal state around the rotating shaft C68, the telescopic rod 60 contracts to the limit state, the deformation of the spring C65 and the spring D66 reaches the limit, the shifting pin 55 tightly presses against the upper end face of the ring sleeve B45, and the driving rod 53 tightly presses against the upper end face of the sealing cover 22.

Then, the electric motor 40 is started, the electric motor 40 drives the rotary base 12 to rotate reversely relative to the base 5 and the sealing cover 22 through the bevel gear a39, the bevel gear B38, the rotating shaft a36, the bevel gear C35, the bevel gear D34, the rotating shaft B32, the straight gear 31 and the gear ring a30 which are installed on the output shaft a74, and the rotary base 12 drives the cylindrical block 56, the pulling pin 55 and the three shaking limiting columns 58 which are separated from the arc-shaped grooves 11 to rotate synchronously.

Meanwhile, the electric motor 40 drives the ring sleeve a43 and the ring sleeve B45 mounted on the ring sleeve a43 to rotate rapidly and reversely relative to the sealing cover 22 through the bevel gear E41 and the gear ring B42 mounted on the output shaft B75, the rotating base 12 drives the shifting pin 55 to approach along the upper end of the ring sleeve B45 to the range of the driving groove B47 on the ring sleeve B45, and the ring sleeve B45 drives the driving rod 53 to approach along the upper end of the sealing cover 22 to the range of the driving groove a26 on the sealing cover 22 through the arc-shaped block 50.

When the shifting pin 55 just reaches the range of the driving groove B47 and abuts against the arc-shaped block 50, the lower end of the driving rod 53 just reaches the range of the driving groove a26, along with the process that the lower end of the driving rod 53 is driven by the ring sleeve B45 to continue moving to the bottom of the driving groove a26, the driving rod 53 moves to the bottom of the driving groove a26 along the inclined plane of the driving groove a26 under the reset action of the spring a54, the arc-shaped block 50 vertically moves to the bottom of the driving groove B47 along with the driving rod 53, the cylindrical block 56 drives the shifting pin 55 and the three shaking limiting columns 58 to synchronously vertically move downwards under the combined action of the spring B59 and the telescopic rod 60 in the compression limit state, and the shifting pin 55 moves to the bottom of the driving groove B47 along the inclined plane of the driving groove B47 along with the arc-shaped block 50 abutting. When the rotary base 12 drives the horizontally contracted boom 70 to swing back to the support frame 2 around the central axis of the base 5 under the driving of the electric motor 40, the toggle pin 55 just reaches the bottom of the driving groove B47, the lower end of the driving rod 53 just reaches the bottom of the driving groove A26 at the top end of the sealing cover 22 under the resetting action of the spring A54, the arc-shaped block 50 reaches the bottom of the driving groove B47, the three swing-limiting columns 58 are respectively and completely inserted into the three arc-shaped grooves 11 at the bottom in the base 5 to limit the relative swing of the base 5 and the rotary base 12, thereby ensuring that the rotary base 12 does not swing relative to the base 5 due to the sudden change of the traveling speed of the crane 1 under the inertia action of the boom 70, preventing the rotary base 12 and the base 5 with the increased moving clearance due to long-time wear from swinging to a relatively large amplitude when the speed of the crane 1 suddenly changes, and reducing the damage of equipment caused by the relative swing between the rotary base, the service life of the equipment is prolonged.

At this time, the recovery and return of the boom 70 can be completed by stopping the operation of the electric motor 40.

In conclusion, the beneficial effects of the invention are as follows: when the boom 70 of the crane 1 is in a recovery state, the three swing limiting columns 58 are respectively inserted into the three arc-shaped grooves 11 at the bottom in the base 5, so that the relative swing between the rotating base 12 and the base 5 is limited, the rotating base 12 is prevented from swinging relative to the base 5 due to the sudden change of the running speed of the crane 1 under the inertia effect of the boom 70, and the equipment damage caused by the relative swing between the rotating base 12 and the base 5 is reduced.

The rotating base 12 rotating relative to the base 5 drives the three limit shaking columns 58 to rapidly separate from the three arc-shaped grooves 11 on the base 5 through a series of transmission and the rotating shaft C68 driven to rotate by the upward-swinging suspension arm 70 drives the three limit shaking columns 58 to rapidly separate from the two unlocking modes of the three arc-shaped grooves 11 on the base 5 limiting the relative swinging of the rotating base 12 and the base 5 through a series of transmission, and no matter which unlocking mode fails, the unlocking effect of the other unlocking mode when the rotating base 12 starts to rotate from the initial state and the unlocking effect of the suspension arm 70 when the rotating base 12 is completely retracted cannot be influenced.

The rotating base 12 rotating relative to the base 5 drives the three swing limiting columns 58 to be quickly separated from the three arc-shaped grooves 11 on the base 5 through a series of transmission, and the rotating shaft C68 driven to rotate by the swinging-up suspension arm 70 drives the three swing limiting columns 58 to be quickly separated from the three arc-shaped grooves 11 on the base 5 through a series of transmission, so that two unlocking modes of limiting the relative swing of the rotating base 12 and the base 5 play a role together, and the locking is ensured to be carried out only after the suspension arm 70 of the crane 1 is completely recovered.

Claims

1. The utility model provides a slewer that quick parking does not have and rocks which characterized in that: the crane base plate swing limiting device comprises a base, a rotating seat, a bearing column, a sealing cover, an electric motor, a cylindrical block, a swing limiting column, a spring B and a rotating shaft C, wherein the base fixedly arranged on a crane base plate is provided with a conical groove, and the rotating seat driven by the electric motor is rotatably matched in the conical groove; the rotating seat is pressed and sealed in the conical groove through a sealing cover arranged on the base through a bolt; a supporting column at the upper end of the rotating seat penetrates through the circular groove B at the top of the sealing cover and is in sealed rotating fit with the inner wall of the circular groove B; the upper end of the bearing column is provided with a bearing plate for hinging the suspension arm and installing the control chamber, and a rotating shaft C arranged at the vertical swing center of the suspension arm of the crane is in rotating fit with two supports B arranged on the bearing plate;

a cylindrical block is vertically slid in a cylindrical chute on the bearing column, and a spring B for resetting the cylindrical block is arranged; three shaking-limiting columns which are uniformly arranged at the lower end of the cylindrical block in the circumferential direction respectively penetrate through the three circular grooves A at the bottom of the sliding groove to be correspondingly matched with the three arc-shaped grooves at the bottom of the conical groove;

2. A quick stop slotless swivel device as claimed in claim 1, wherein: the conical groove of the base is provided with a conical surface A, and a plurality of balls which are in rolling fit with the conical surface B on the rotating seat are uniformly and densely distributed on the conical surface A in the circumferential direction; the sealing cover is internally provided with a conical surface D, and a plurality of balls which are in rolling fit with the conical surface C on the rotating seat are uniformly distributed on the conical surface D in the circumferential direction; the spring B is positioned in the annular accommodating groove at the upper end of the conical block; one end of the spring B is connected with the bottom of the accommodating groove, and the other end of the spring B is connected with the top in the sliding groove; and a rotary sealing structure is arranged between the bearing column and the inner wall of the circular groove B.

3. A quick stop slotless swivel device as claimed in claim 1, wherein: the sealing cover is rotatably matched with a rotating shaft B, and a rotary sealing structure is arranged between the rotating shaft B and the sealing cover; a spur gear is arranged on the rotating shaft B and is meshed with a gear ring A arranged on the rotating seat; a rotating shaft A is rotatably matched on a support A arranged on the base, a bevel gear C is arranged on the rotating shaft A, and the bevel gear C is meshed with a bevel gear D arranged on the rotating shaft B; the electric motor is arranged on the base, and a bevel gear A arranged on an output shaft A of the electric motor is meshed with a bevel gear B arranged on a rotating shaft A.

4. A quick stop slotless swivel device as claimed in claim 1, wherein: a ring sleeve A is rotationally matched on the sealing cover, a gear ring B is arranged on the ring sleeve A, and the gear ring B is meshed with a bevel gear E arranged on an output shaft B of the electric motor; a ring sleeve B with the same central axis is fixedly arranged on the inner wall of the ring sleeve A, and a horizontal shifting pin arranged on the side wall of the cylindrical block passes through the movable groove A on the side wall of the bearing column to be matched with the inverted trapezoidal driving groove B at the upper end of the ring sleeve B and the upper end face of the ring sleeve B; an arc-shaped block which can be filled in the driving groove B is vertically matched on the ring sleeve B in a sliding manner; a spring A for resetting the arc-shaped block is arranged on the ring sleeve B; the lower end of the arc-shaped block is provided with a vertical driving rod, and the driving plate is matched with an inverted triangle driving groove A on the sealing cover below and the upper end face of the sealing cover.

5. A rapid parking slotless swivel device as claimed in claim 4, wherein: the bottom of the driving groove B is provided with a movable groove D, and the bottom of the movable groove D is provided with a circular groove C; the arc-shaped block is vertically movable in the movable groove D, and a plurality of guide teeth which are symmetrically distributed at two ends of the arc-shaped block respectively slide in a plurality of guide grooves on the inner wall of the driving groove B; a circular groove D is formed in the lower end face of the arc-shaped block, and the driving rod is installed in the circular groove D and penetrates through the circular groove C to be matched with a driving groove A below the driving rod; the spring A is nested on the driving rod and is positioned in the circular groove D; one end of the spring A is connected with the bottom of the movable groove D, and the other end of the spring A is connected with the top of the circular groove D; the spring A is an extension spring and is always in an extension state; the sealing cover is provided with a trapezoidal guide ring which rotates in a trapezoidal ring groove on the inner wall of the ring sleeve A.

6. A quick stop slotless swivel device as claimed in claim 1, wherein: a crank perpendicular to the rotating shaft C is installed on the rotating shaft C, and the tail end of the crank is connected with the upper end of the cylindrical block through a telescopic rod; two ends of the telescopic rod are respectively hinged with the crank and the cylindrical block; and a spring C for stretching and retracting the telescopic rod are arranged in the telescopic rod.

7. A rapid parking slotless swivel device as claimed in claim 6, wherein: the telescopic rod consists of an outer sleeve and an inner rod which are sleeved with each other; a sliding block arranged at one end of the inner rod slides in a sliding groove C on the inner wall of the outer sleeve; the spring C and the spring D are respectively positioned on two sides of the sliding block; the spring C and the spring D are always in a compression energy storage state; the telescopic rod is movably arranged in a movable groove B at the top of the bearing column and a movable groove C on the bearing plate.

8. A rapid parking slotless swivel device as claimed in claim 4, wherein: the speed of the electric motor driving the ring sleeve A to rotate is higher than that of the electric motor driving the rotating seat to rotate, and the rotating direction of the rotating seat is opposite to that of the ring sleeve A.