Elevator drags and draws round drilling equipment
Technical Field
The invention relates to the technical field of elevator component machining, in particular to elevator dragging wheel drilling machining equipment.
Background
The elevator traction wheel is a key component in an elevator traction driving system, a mounting hole of the traction wheel is connected with a main shaft of a traction machine, and the traction wheel is connected with a lift car and a counterweight through a traction steel rope and mainly acts as power transmission to realize lifting of passengers and cargoes.
The drawing wheel is mainly formed by processing a casting process, and a plurality of circumferentially uniformly distributed structural holes are reserved in casting, so that the overall weight and the material use are reduced, and in some special design requirements, non-critical areas of the drawing wheel can be uniformly drilled in order to increase the radiating area of the surface of the drawing wheel, improve the radiating efficiency, lighten the weight, inhibit vibration and release stress, and the functions and the safety performance of the drawing wheel are not influenced while the requirements are ensured.
At present, when the pulling wheel is drilled, the pulling wheel is fixed on a drilling machine at first, meanwhile, the area needing to be drilled is marked manually, then the drilling operation is carried out on the marking position through the drilling machine, the inner ring and the outer ring of the pulling wheel are required to be drilled and the drilled through holes are uniformly distributed in the circumferential direction, but the problem that 1, in the current operation process, in the operation process of only carrying out one through hole at a time, the drill bit is required to move downwards to the next drilling position after a single through hole is formed, and thus, the repeated drilling operation is carried out to form a plurality of through holes.
2. At present, in the single drilling operation process, the drill bit in the drilling machine moves downwards to carry out the drilling operation, and the angle between the drill bit and the dragging wheel is easy to change due to drilling vibration in the machining process, so that the quality of a through hole is influenced, the function and the safety performance of the dragging wheel can be influenced when the quality is serious, and in the downward moving drilling operation process, the drill bit applies acting force to the dragging wheel, and the acting force can influence the balance state of the dragging wheel to influence the quality of the drilling operation.
Disclosure of Invention
Based on this, it is necessary to provide an elevator tug wheel drilling machine which aims at solving the problems of the prior art described above.
The application provides elevator dragging wheel drilling equipment which comprises a bottom plate, wherein the bottom plate is annular, an avoidance groove for avoiding drilling operation is formed in the bottom plate in a penetrating mode up and down, a base circular plate is fixedly arranged on the inner annular surface of the bottom plate through three connecting strips which are uniformly distributed in the circumferential direction, a central shaft with an axis extending from top to bottom is arranged on the base circular plate in a penetrating mode in a rotating mode, and a mounting circular plate is sleeved on the central shaft in a sliding mode up and down.
The clamping mechanism is arranged on the base circular plate and the installation circular plate together and used for clamping the dragging wheel, the clamping mechanism comprises a branch plate, three branch plates which are uniformly distributed in the circumferential direction are fixedly arranged on the circumferential surfaces of the base circular plate and the installation circular plate, connecting strips on the base circular plate and the branch plates are distributed at intervals, two arc plates which slide along the radial direction of the installation circular plate are arranged on the lower end face of the upper side branch plate in a sliding manner, and a driving unit is arranged on the base circular plate and the installation circular plate together.
The drilling mechanism is arranged on the central shaft and comprises a triangular plate, the triangular plate is vertically sliding on the central shaft and is of an equilateral triangle shape, fixing columns with horizontal axes are fixedly arranged on three sides of the triangular plate, a horizontal plate is arranged on the fixing columns in a sliding mode along the axial direction of the fixing columns, a mounting plate is arranged on one side of the lower end face of the horizontal plate, drilling equipment is arranged on the lower end face of the mounting plate, and a guide unit for guiding the drilling equipment to conduct drilling operation is arranged on the bottom plate.
According to an advantageous embodiment, the drilling mechanism further comprises a center column, the upper end face of the triangular plate is fixedly provided with a center column with an axis located in the center of the center column and extending vertically upwards, a driving plate is sleeved on the center column in an up-down sliding mode, a driving strip is hinged between the driving plate and the horizontal plate, the horizontal plate is sequentially divided into a U-shaped section, a first rectangular section and a second rectangular section in the horizontal direction, the thickness of the first rectangular section is larger than that of the second rectangular section, and a rectangle Duan Er on the horizontal plate is clamped into the U-shaped section of the adjacent horizontal plate.
According to an advantageous embodiment, the guiding unit comprises a guiding assembly, a plurality of groups of guiding assemblies which are uniformly distributed circumferentially are fixedly arranged on the upper end face of the bottom plate, the guiding assembly comprises two fixing cylinders which are radially distributed along the bottom plate, and a guiding column with an axis extending from top to bottom is fixedly arranged on the end face of the horizontal plate far away from the triangular plate through a horizontal bar.
According to an advantageous embodiment, the upper end surface of the fixed cylinder is fixedly provided with a round platform cylinder with a large upper part and a small lower part, and the diameter of the guide post is the same as the diameter of the inner cylinder of the fixed cylinder.
According to an advantageous embodiment, a limiting group is arranged between two adjacent horizontal plates, the limiting group comprises a sliding groove, the lower end face of the U-shaped section of the horizontal plate is provided with the sliding groove, the upper end face of the mounting plate is arranged in the sliding groove in a sliding manner through a sliding block, four limiting columns in diamond arrangement are fixedly arranged on the upper end face of the mounting plate, and the rectangular section two of the adjacent horizontal plates penetrate through the four limiting columns.
According to an advantageous embodiment, the guiding unit further comprises an annular plate, the upper end face of the bottom plate is rotatably provided with the annular plate coaxial with the annular plate, the upper end face of the annular plate is fixedly provided with a supporting plate corresponding to the mounting plate one by one, the upper section of the supporting plate is a U-shaped section, two clamping grooves which are symmetrical to each other are formed in the U-shaped area of the U-shaped section of the supporting plate, a moving block is arranged in the clamping grooves in a vertically sliding mode, and the side edge of the mounting plate is fixedly provided with a horizontal column of which the axis is horizontal and penetrates through the corresponding moving block in a sliding mode.
According to an advantageous embodiment, the clamping mechanism further comprises rectangular blocks, the rectangular blocks are installed on the branch plates in a penetrating manner along the radial sliding direction of the installation circular plate, the lower end faces of the upper rectangular blocks are fixedly connected with the corresponding arc-shaped plates, and the outer arc surfaces of the two arc-shaped plates on the same branch plate are opposite.
According to an advantageous embodiment, the upper end face of the rectangular block below is fixedly provided with a butt joint column, the lower end face of the arc plate is provided with a butt joint groove corresponding to the butt joint column, and the lower side of the butt joint groove is subjected to chamfering treatment.
According to an advantageous embodiment, the driving unit comprises an erecting plate, the upper end face of the rectangular block on the upper side and the lower end face of the rectangular block on the lower side are fixedly provided with erecting plates, the upper end face of the upper side branch plate and the lower end face of the lower side branch plate are fixedly provided with supporting blocks, the supporting blocks are provided with bidirectional screw rods with horizontal axes and pointing to the central shaft axes in a rotating mode, the bidirectional screw rods penetrate through the corresponding erecting plates and are in threaded fit with the corresponding erecting plates, the upper end face of the mounting circular plate and the lower end face of the base circular plate are provided with rotating cylinders with vertical axes in a rotating mode, bevel gears I are fixedly arranged on the opposite faces of the two rotating cylinders, bevel gears II meshed with the corresponding bevel gears I are fixedly arranged on the end faces, close to the rotating cylinders, of the bidirectional screw rods, and the threads of the two bidirectional screw rods which are opposite up and down are opposite.
According to an advantageous embodiment, the driving unit further comprises a circumferential groove, a plurality of circumferential grooves which are uniformly distributed in the circumferential direction are formed in the upper circumferential surface of the central shaft, and a plurality of clamping blocks which are in one-to-one sliding fit with the plurality of circumferential grooves are fixedly arranged on the upper bevel gear I.
In summary, the invention has at least one of the following beneficial effects that firstly, the drill bit is controlled to move to the required drilling operation position through the insertion and connection cooperation of the guide post and the fixing cylinders at different positions, the drill bit is locked, then three drill bits synchronously move downwards to perform the drilling operation, the repeated drilling operation of a single through hole is avoided, the machining operation efficiency in the whole machining operation process is improved, secondly, the stress balance of the dragging wheel is ensured through the synchronous drilling operation of the three drill bits distributed in a triangular shape, the processing requirement of the outer ring through hole is met through the cooperation of the guide post and the outer ring fixing cylinders at different positions through the rotation of the triangular plate, the processing requirement of the inner ring through hole is met through the cooperation of the guide post and the inner ring fixing cylinders through the movement of the horizontal plate, the applicability of equipment is improved, the drilling operation step is simplified, and the precision of the drilling operation is improved.
2. According to the invention, the triangular structure formed by the three horizontal plates mutually limited and abutted by the limiting columns is used as a frame in the subsequent drilling operation process, the fixing cylinder not only guides the downward movement of the guide column in the drilling process, but also provides circumferential limitation for the horizontal plates after being matched with the guide column, so that the stability in the drilling operation process is improved, and the problem that the drilling operation process is influenced due to shaking of the horizontal plates and drilling equipment on the horizontal plates is avoided.
3. According to the invention, the movable block is arranged in the U-shaped section of the corresponding supporting plate through the cooperation between the clamping block on the movable block and the corresponding clamping groove, so that the convenience of equipment operation is improved, and the vertical movement process of the mounting plate is guided through the cooperation between the movable block and the clamping groove in the process of downwards moving the triangular plate and the horizontal plate for drilling operation, so that the stability of the vertical downwards moving of the drill bit is ensured, and the accuracy of drilling operation is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic perspective view of the present invention.
Fig. 2 shows a partial perspective view of the present invention.
Fig. 3 shows a schematic perspective view of the present invention between the triangle, the horizontal plate and the guide post.
Fig. 4 shows a partially cut-away perspective view of the present invention between the arcuate plate, mounting plate and base plate.
Fig. 5 shows an enlarged view at a in fig. 4.
Fig. 6 shows an enlarged view at B in fig. 4.
The drawing comprises the following reference numerals of 1, a bottom plate, 2, an avoidance groove, 3, a base circular plate, 4, a central shaft, 5, a mounting circular plate, 6, a clamping mechanism, 60, a branch plate, 61, an arc plate, 62, a driving unit, 620, an upright plate, 621, a supporting block, 622, a bidirectional screw rod, 623, a rotating cylinder, 624, a bevel gear I, 625, a bevel gear II, 626, a circumferential groove, 627, a clamping block, 63, a rectangular block, 64, a butt joint column, 640, a butt joint groove, 7, a drilling mechanism, 70, a triangular plate, 700, a fixed column, 701, a horizontal plate, 702, a mounting plate, 703, a drill bit, 71, a guiding unit, 710, a fixed cylinder, 711, a guiding column, 712, a circular cylinder, 713, a sliding groove, 714, a limiting column, 715, an annular plate, 716, a supporting plate, 717, a clamping groove, 718, a moving block 719, a horizontal column, 72, a center column, 720, a driving plate, 721 and driving bars.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
As shown in figures 1, 2 and 4, the elevator dragging wheel drilling processing equipment comprises a bottom plate 1, wherein the bottom plate 1 is annular, an avoidance groove 2 for avoiding drilling operation is formed in the bottom plate 1 in a penetrating mode up and down, a base circular plate 3 is fixedly arranged on the inner annular surface of the bottom plate 1 through three connecting strips which are uniformly distributed in the circumferential direction, a central shaft 4 with an axis extending from top to bottom is arranged on the base circular plate 3 in a penetrating mode in a rotating mode, and an installation circular plate 5 is sleeved on the central shaft 4 in a sliding mode up and down.
As shown in fig. 1,2 and 4, the base circular plate 3 and the mounting circular plate 5 are jointly provided with a clamping mechanism 6 for clamping the dragging wheel, the clamping mechanism 6 comprises a branch plate 60, the circumferential surfaces of the base circular plate 3 and the mounting circular plate 5 are fixedly provided with three branch plates 60 which are uniformly distributed in the circumferential direction, connecting strips on the base circular plate 3 and the branch plates 60 are distributed at intervals, the lower end surface of the upper side branch plate 60 is slidably provided with two arc plates 61 which slide along the radial direction of the mounting circular plate 5, and the base circular plate 3 and the mounting circular plate 5 are jointly provided with a driving unit 62.
As shown in fig. 1,2 and 3, the central shaft 4 is provided with a drilling mechanism 7, the drilling mechanism 7 includes a triangle 70, the central shaft 4 slides up and down with the triangle 70, and the triangle 70 is an equilateral triangle, the triangle 70 is driven by an external hydraulic cylinder one (not shown in the figure) to move up and down, three sides of the triangle 70 are all fixedly provided with a fixed column 700 with a horizontal axis, the fixed column 700 is slidingly provided with a horizontal plate 701 along the axis direction thereof, one side of the lower end face of the horizontal plate 701 is provided with a mounting plate 702, the lower end face of the mounting plate 702 is provided with drilling equipment, the drilling equipment includes a drill bit 703 with a vertical axis, and the bottom plate 1 is provided with a guiding unit 71 for guiding the drilling equipment to perform drilling operation.
In operation, the drawing wheel is firstly placed on the bottom plate 1 in a state that the axis is vertical, it is to be noted that a plurality of freely rolling balls (not shown in the figure) are arranged on the upper end surface of the bottom plate 1 and used for reducing friction force between the drawing wheel and the bottom plate 1, the central shaft 4 passes through the drawing wheel mounting hole in the placing process, then the mounting circular plate 5 and the branch plate 60 thereon are mounted on the central shaft 4 in a plug-in matching manner, the two arc plates 61 on the same branch plate 60 on the mounting circular plate 5 are respectively inserted into the mounting hole and the structural hole, the driving unit 62 works so that the two arc plates 61 on the same branch plate 60 clamp the drawing wheel, the axis of the drawing wheel is collinear with the axis of the central shaft 4, then the triangular plate 70 is inserted and assembled on the central shaft 4 from top to bottom, the guiding unit 71 guides the triangular plate 70 to rotate to a designated position, then the external hydraulic cylinder drives the triangular plate 70 to move from top to bottom so that the angular plate 703 performs drilling operation, and then the guiding unit 71 rotates the triangular plate 70 and the position of the drilling operation on the flat plate 701.
As shown in fig. 2 and 3, the drilling mechanism 7 further includes a central column 72, the upper end surface of the triangle 70 is fixedly provided with a central column 72 having an axis located at the center thereof and extending vertically upwards, the central column 72 is sleeved with a driving plate 720 in a vertically sliding manner, the driving plate 720 is driven by an external hydraulic cylinder two (not shown in the drawings) to move up and down, a driving strip 721 is hinged between the driving plate 720 and the horizontal plate 701, the horizontal plate 701 is sequentially divided into a U-shaped section, a rectangular section one and a rectangular section two in the horizontal direction, wherein the thickness of the rectangular section one is greater than that of the rectangular section two, and a rectangle Duan Er on the horizontal plate 701 is clamped into the U-shaped section of the adjacent horizontal plate 701.
As shown in fig. 1,2 and 3, the guiding unit 71 includes guiding components, a plurality of groups of guiding components uniformly distributed circumferentially are fixedly disposed on the upper end surface of the base plate 1, the guiding components include two fixing drums 710 radially distributed along the base plate 1, and guiding columns 711 extending from top to bottom along axes are fixedly disposed on the end surface of the horizontal plate 701 away from the triangle 70 through horizontal bars.
As shown in fig. 2 and 3, the upper end surface of the fixed cylinder 710 is fixedly provided with a circular truncated cone 712 having a large upper part and a small lower part, and the diameter of the guide column 711 is the same as the diameter of the inner cylinder of the fixed cylinder 710.
As shown in fig. 2 and fig. 3, a limiting group is disposed between two adjacent horizontal plates 701, the limiting group includes a sliding groove 713, the lower end surface of the U-shaped section of the horizontal plate 701 is provided with the sliding groove 713, the upper end surface of the mounting plate 702 is slidably disposed in the sliding groove 713 through a sliding block, four diamond-shaped limiting columns 714 are fixedly disposed on the upper end surface of the mounting plate 702, and the rectangular section two of the adjacent horizontal plates 701 passes through the four limiting columns 714.
As shown in fig. 1, 2 and 3, the guiding unit 71 further includes an annular plate 715, the upper end surface of the bottom plate 1 is rotatably provided with the annular plate 715 coaxial with the annular plate 715, the upper end surface of the annular plate 715 is fixedly provided with a support plate 716 corresponding to the mounting plate 702 one by one, the upper section of the support plate 716 is a U-shaped section, two mutually symmetrical clamping grooves 717 are formed in the U-shaped area of the U-shaped section of the support plate 716, a moving block 718 is vertically slidably arranged in the clamping grooves 717, and the side edge of the mounting plate 702 is fixedly provided with a horizontal column 719 with a horizontal axis and slidably penetrating through the corresponding moving block 718.
When in operation, after the dragging wheel is placed and limited and clamped by the clamping mechanism 6, the axis of the dragging wheel is collinear with the axis of the central shaft 4, then the triangular plate 70 and the horizontal plate 701 thereon are inserted and placed on the central shaft 4 from top to bottom, the external hydraulic cylinder II works to enable the driving plate 720 to move up and down, the driving plate 720 drives the three horizontal plates 701 to synchronously move along the axis direction of the fixed column 700 through the three driving strips 721 thereon, the horizontal plates 701 drive the corresponding guide columns 711 to synchronously move through the horizontal strips, when the guide columns 711 move to the outside above the corresponding fixed cylinders 710, the movement is stopped, the triangular plate 70 is downwards moved, the triangular plate 70 drives the guide columns 711 to synchronously move down, the guide columns 711 firstly contact the arc-shaped surface of the circular cylinder 712 in the downward movement process of the guide columns, the circular cylinder 712 guides the guide columns 711 to be aligned with the fixed cylinder 710, along with the continuous downward movement of the guide posts 711, the guide posts 711 are inserted into the fixed cylinder 710, so that the positions of the corresponding horizontal plates 701 are limited and fixed through the cooperation between the three guide posts 711 and the corresponding fixed cylinder 710 on the outer side, and the rectangular sections II on the three horizontal plates 701 are clamped into the U-shaped sections on the adjacent horizontal plates 701, so that the triangular structure formed by the three limited horizontal plates 701 is used as a reference frame in the subsequent drilling operation process, and meanwhile, the fixed cylinder 710 is used as the guide of the downward movement of the guide posts 711 and provides a circumferential limiting effect for the horizontal plates 701 after being matched with the guide posts 711, thereby improving the stability in the drilling operation process and avoiding the problem that the shaking of the horizontal plates 701 and drilling equipment on the horizontal plates 701 affects the drilling operation process.
In the process of moving the horizontal plates 701 downwards and butting the guide posts 711 with the fixed cylinders 710, the three horizontal plates 701 synchronously move along the corresponding fixed posts 700, the moving speed is the same, and meanwhile, the rectangular sections II of the adjacent horizontal plates 701 are limited by the four limiting posts 714 on the same mounting plate 702, the mounting plate 702 synchronously slides along the sliding grooves 713, so that the mounting plate 702 and the drill bits 703 are always positioned at the juncture of the corresponding two horizontal plates 701, namely, the three drill bits 703 are uniformly distributed circumferentially about the axis of the central shaft 4, then drilling operation is performed, after the drilling operation is completed, the triangular plates 70 are moved upwards, and the staff rotates the triangular plates 70 to enable the guide posts 711 to be matched with the fixed cylinders 710 on the outer sides, so that the drilling operation requirements of all drilling positions of the outer ring are completed. Through the drilling operation mode, the drilling operation can be carried out on three positions simultaneously, the repeated drilling operation of a single through hole is avoided, the machining operation efficiency in the whole machining operation process is improved, and the stress balance of the dragging wheel is kept through the synchronous drilling operation of three triangular distribution, it is to be noted that when the outer side fixing cylinder 710 is matched with the guiding column 711, the drill bit 703 is located right above the outermost through hole, when the inner side fixing cylinder 710 is matched with the guiding column 711, the drill bit 703 moves to the right above the inner side through hole, the adjustment process of the triangular distribution frame with the same axis center and different sizes is realized by adjusting the position of the horizontal plate 701, the drilling requirement of the through holes at different diameters of the dragging wheel is conveniently met, namely, when the drilling requirement of a plurality of through holes of the outer ring is finished, the positions of the horizontal plate 701 are adjusted by moving the driving plate 720, the guiding column 711 is matched with the inner side fixing cylinder 710, and then the drilling operation of the drilling position of the inner ring can be carried out.
At the same time of installing the triangular plate 70, the movable block 718 is installed into the U-shaped section of the corresponding supporting plate 716 through the cooperation between the movable block 718 and the corresponding clamping groove 717, so that in the process of downwards moving the triangular plate 70 and the horizontal plate 701 for drilling operation, the vertical movement process of the mounting plate 702 is guided and limited through the cooperation between the movable block 718 and the clamping groove 717, and the stable vertical downwards movement of the drill bit 703 is ensured all the time through the cooperation between the guide post 711 and the fixed barrel 710 and the cooperation between the movable block 718 and the clamping groove 717, thereby improving the accuracy of the drilling operation.
As shown in fig. 1, 2,4 and 6, the clamping mechanism 6 further includes a rectangular block 63, the rectangular block 63 is installed on the branching plate 60 in a sliding manner along the radial direction of the installation circular plate 5, the lower end surface of the upper rectangular block 63 is fixedly connected with the corresponding arc plate 61, and the extrados of the two arc plates 61 on the same branching plate 60 is opposite.
As shown in fig. 4 and 6, the upper end surface of the rectangular block 63 is fixedly provided with a docking post 64, the lower end surface of the arc plate 61 is provided with a docking groove 640 corresponding to the docking post 64, and the lower side of the docking groove 640 is chamfered.
As shown in fig. 1, 2, 4, 5 and 6, the driving unit 62 includes an upright plate 620, the upright plate 620 is fixedly disposed on the upper end surface of the rectangular block 63 on the upper side and the lower end surface of the rectangular block 63 on the lower side, the supporting block 621 is fixedly disposed on the upper end surface of the upper side branch plate 60 and the lower end surface of the lower side branch plate 60, the bidirectional screw 622 having a horizontal axis and pointing to the axis of the central shaft 4 is rotatably disposed on the supporting block 621, the bidirectional screw 622 penetrates the corresponding upright plate 620 and is in threaded engagement with the corresponding upright plate 620, the upper end surface of the mounting circular plate 5 and the lower end surface of the base circular plate 3 are rotatably disposed with rotating drums 623 having vertical axes, bevel gears one 624 are fixedly disposed on opposite sides of the two rotating drums 623, bevel gears two 625 meshed with the corresponding bevel gears one 624 are fixedly disposed on the end surfaces of the bidirectional screw 622 near the rotating drums 623, and the central shaft 4 is connected with an external motor (not shown in the figure) in opposite directions.
As shown in fig. 1,4 and 5, the driving unit 62 further includes a circumferential groove 626, the upper circumferential surface of the central shaft 4 is provided with a plurality of circumferential grooves 626 that are uniformly distributed in the circumferential direction, and a plurality of clamping blocks 627 that are in one-to-one sliding fit with the plurality of circumferential grooves 626 are fixedly disposed on the upper bevel gear 624.
When the device works, firstly, a traction wheel is required to be placed on the bottom plate 1 in a state that the axis is vertical, the central shaft 4 passes through the traction wheel mounting hole, then the mounting circular plate 5 and the branch plates 60 on the mounting circular plate 5 are mounted on the central shaft 4 in a plug-in fit mode, the two arc plates 61 on the same branch plate 60 on the mounting circular plate 5 are respectively inserted into the mounting hole and the structural hole, the butt joint posts 64 are clamped into the butt joint grooves 640 on the corresponding arc plates 61, and at the moment, the upper branch plates 60, the corresponding arc plates 61 and the corresponding lower branch plates 60 are integrated, so that the internal stretching limiting effect of the arc plates 61 is ensured in the subsequent process.
Then the external motor works to drive the central shaft 4 and the lower bevel gear one 624 to synchronously rotate, meanwhile, the central shaft 4 drives the upper bevel gear one 624 to synchronously rotate through the cooperation between the circumferential groove 626 and the clamping blocks 627, the bevel gears two 625 and the corresponding bidirectional screw rods 622 are synchronously rotated through the meshing between the bevel gears one 624 and the corresponding three bevel gears two 625, the two arc plates 61 on the same branch plate 60 are mutually close through the threaded cooperation between the bidirectional screw rods 622 and the corresponding vertical plates 620, the arc plates 61 are abutted against the arc inner walls of the corresponding structural holes and the mounting holes, the arc plates 61 on the three branch plates 60 are abutted against the structural holes and the inner walls of the mounting holes to realize the internal expanding limit of the dragging wheel, the axis of the central shaft 4 and the axis of the dragging wheel are uniformly distributed in the circumferential direction, the synchronous movement of the vertical plates 620 on the upper side and the lower side plates 620 in the process is guaranteed, the expanding effect of the dragging wheel is guaranteed, the problem that one end of the two arc plates 61 is expanded to influence the expanding effect on the dragging wheel is avoided, and the two opposite arc plates on the two opposite side of the upper side of the frame 60 of the rectangular frame 60 are simultaneously, and the stability of the two opposite side frame 60 of the rectangular frame is guaranteed.
In the above process, through the grafting installation mode between joint piece 627 and the circumferential groove 626, the center pin 4 still can drive upside bevel gear one 624 synchronous rotation when having guaranteed that the installation plectane 5 moves down, secondly through this kind of grafting installation mode, the grafting installation mode of set square 70, is convenient for follow-up drawing wheel place and take out the process and develop smoothly, simplifies equipment operation flow, improves the convenience of equipment.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present invention, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not limited in scope by the present invention, so that all equivalent changes according to the structure, shape and principle of the present invention are covered in the scope of the present invention.