CN217045356U - Multi-shaft screwing pitch-changing mechanism and multi-shaft screwing device - Google Patents

Abstract

The application belongs to the technical field of assembly, and provides a multi-shaft screwing pitch-changing mechanism and a multi-shaft screwing device. This multiaxis screws up displacement mechanism includes: a base; the variable pitch module is arranged on the base and comprises at least one tightening module, and the tightening module comprises a tightening shaft; the first driving mechanism is connected with the variable pitch modules and is suitable for driving at least two variable pitch modules to move back to back or move oppositely on the base along a first direction; wherein the first direction is a non-radial direction. The utility model provides a displacement mechanism is screwed up to multiaxis through two at least displacement modules of first actuating mechanism drive back to the motion or the relative motion in the first direction for distance between two displacement modules shortens or increases with the form of axial symmetry, thereby has reached the purpose of reducing, has enlarged the reducing scope, and overall structure is simple, easily realizes, makes a plurality of axles of screwing up can realize the installation and the dismantlement of a plurality of fasteners of axial symmetry.

Description

Multi-shaft screwing pitch-changing mechanism and multi-shaft screwing device

Technical Field

The utility model relates to the field of assembly technique, concretely relates to device is screwed up to displacement mechanism and multiaxis to multiaxis tightening.

Background

When the large-scale engineering machinery tire is assembled, the large-scale engineering machinery tire is conveyed to an assembly station by a forklift, then the tire is hoisted by a crane manually, machines of various models can exist in the same type, the tire tightening nuts are distributed in a plurality of circles, the whole machine needs 40 to 80 manual assembly nuts, and repeated operation is multiple.

In the related art, there are various diameter-variable tightening shaft mechanisms for tightening nuts on a distribution circle, for example, elongated holes radially arranged along the distribution circle of the tightening shaft, and the tightening shaft is radially adjustable along the elongated holes. The variable diameter function is realized by adjusting the included angle between each axis by controlling and moving the module by adopting an air cylinder; or the follow-up cam drives the tightening shafts or the pressing heads to move along the radial direction by driving the cam disc to rotate so as to realize the pitch change of the plurality of tightening shafts or the plurality of pressing heads.

The variable-diameter structure is characterized in that the tightening shaft is adjusted in the radial direction to realize variable distance, namely, the variable distance adjustment can be only carried out in the circumferential diameter direction, and the variable distance adjustment between the symmetrical shafts cannot be realized, so that the variable-diameter adjustment range is small.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the reducing regulation that can not realize between the symmetry axis among the prior art for the little defect of reducing control range, thereby provide a device is screwed up to displacement mechanism and multiaxis to the multiaxis.

In order to solve the problem, the utility model provides a displacement mechanism is screwed up to multiaxis, include: a base; the variable-pitch module is arranged on the base and comprises at least one screwing module, and the screwing module comprises a screwing shaft; the first driving mechanism is connected with the variable pitch modules and is suitable for driving at least two variable pitch modules to move back to back or move oppositely on the base along a first direction; wherein the first direction is a non-radial direction.

The multi-shaft tightening pitch-varying mechanism drives at least two pitch-varying modules to move back to back or move in opposite directions in a first direction X through the first driving mechanism, so that the distance between the two pitch-varying modules is shortened or increased in an axisymmetric mode, the purpose of reducing is achieved, the diameter-varying range is enlarged, the overall structure is simple, the multi-shaft tightening pitch-varying mechanism is easy to achieve, and a plurality of tightening shafts can be used for achieving the installation and the disassembly of a plurality of axisymmetric fasteners.

In one possible implementation, the pitch module further includes: the second driving mechanism is connected with the tightening module and is suitable for driving the tightening module to move along a second direction; the second direction is a non-radial direction, and an included angle is formed between the second direction and the first direction.

In one possible embodiment, the second drive mechanism is connected to each of the two screwing modules in order to drive the two screwing modules in a movement away from each other or in a movement towards each other in the second direction.

In one possible implementation, the first drive mechanism and the second drive mechanism each comprise: a power take-off module; the linear output module is connected with the power output module; the linear output module of the first driving mechanism is connected with the variable pitch module so that the variable pitch module can linearly move along a first direction, and the linear output module of the second driving mechanism is connected with the tightening module so that the tightening module can linearly move along a second direction.

In one possible implementation, the power take-off module includes: a motor having a rotational output; and the transmission mechanism is connected with the rotation output end and the linear output module, so that the linear output module converts rotation into outputtable linear motion.

In one possible implementation, the straight line output module includes: a lead screw having a threaded section; and the nut seat is in threaded connection with the threaded section and is connected with the variable-pitch module or the screwing module. Wherein, the transmission mechanism is partially arranged on the polish rod of the lead screw; the thread sections are one or two, the two thread sections are arranged at intervals in the axial direction, and the thread directions of the two thread sections are opposite.

In a possible implementation manner, the motor is a servo motor, and the servo motor is suitable for acquiring the variable diameter information and controlling the corresponding variable distance module or the tightening module to perform corresponding actions according to the variable diameter information.

In a possible implementation manner, the base has a limiting hole, and the pitch varying module further includes: the variable-pitch mounting plate is provided with a sliding chute and is opposite to the limiting hole; the tightening module further comprises a tightening shaft mounting plate, the tightening shaft penetrates through the tightening shaft mounting plate, the sliding groove and the limiting hole, and the tightening shaft mounting plate is in sliding connection with the sliding groove in the second direction.

In one possible implementation, the multi-axis tightening pitch mechanism further includes: the guide rails are arranged on two opposite sides of the base and extend in a first direction; wherein, the pitch changing module is connected with the guide rail in a sliding way.

The utility model also provides a device is screwed up to multiaxis, screw up the mechanism including foretell multiaxis.

The utility model has the advantages of it is following:

1. the utility model discloses a first actuating mechanism drive two at least displacement modules move or move in opposite directions in the first direction dorsad for the distance between two displacement modules shortens or increases with the form of axial symmetry, thereby has reached the purpose of reducing, has enlarged the reducing scope, and overall structure is simple, easily realizes, makes a plurality of screw up the installation and the dismantlement of a plurality of fasteners that the axle is symmetrical can be realized to a plurality of;

2. the two tightening modules are driven by the second driving mechanism to move in the second direction, so that the diameter changing range is further expanded;

3. the variable diameter information is obtained through the servo motor, and flexibility and automation in adjusting the variable diameter range are achieved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 illustrates a perspective view of a multi-axis tightening pitch mechanism;

FIG. 2 illustrates a partial perspective view of a multi-axis tightening pitch mechanism;

FIG. 3 illustrates a top view of a multi-axis tightening pitch mechanism;

FIG. 4 illustrates one of the methods of the variable diameter process for different reference circles of a multi-axis tightening pitch mechanism;

FIG. 5 shows a second method of a variable diameter process for different reference circles of a multi-axis tightening pitch-varying mechanism;

FIG. 6 shows a third method of a multi-axis tightening variable pitch mechanism for reducing different reference circles;

FIG. 7 illustrates a fourth method of the variable diameter process for different reference circles of the multi-axis tightening pitch mechanism;

FIG. 8 shows a fifth method of variable diameter processing for different reference circles of a multi-axis tightening pitch-varying mechanism;

fig. 9 shows a sixth method of the variable diameter process for different reference circles of the multi-axis tightening pitch-varying mechanism.

Description of reference numerals:

10. a multi-shaft screwing distance-changing mechanism; 100. a base; 110. a limiting hole; 200. a variable pitch module; 210. screwing the module; 211. screwing a shaft; 213. screwing down the shaft mounting plate; 220. a second drive mechanism; 221. a second motor; 223. a second lead screw; 2231. a first threaded portion; 2233. a second threaded portion; 225. a second transmission mechanism; 2251. a driving gear; 2253. a driven gear; 227. a second nut seat; 229. a second support structure; 230. a variable pitch mounting plate; 231. a chute; 300. a first drive mechanism; 310. a first motor; 320. a first lead screw; 321. a first thread segment; 323. a second thread segment; 330. a first transmission mechanism; 340. a first nut seat; 400. a guide rail; x, a first direction; y, a second direction; 500. a first support structure.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Summary of the application

At present, the following forms mainly exist in the tightening shaft mechanism with variable diameter:

(1) the machine case bottom plate is provided with an adjusting hole and a tightening shaft radial position adjusting mechanism, the adjusting hole is a long hole which is radially arranged along a tightening shaft distribution circle, the radial position of the distribution circle in the adjusting hole can be adjusted, an adjusting bolt and an adjusting nut which are in threaded fit are adopted, the adjusting nut is fixed on the periphery of the bottom of the machine case, the axis of the adjusting bolt is radially arranged along the tightening shaft distribution circle, the adjusting bolt is linked with the tightening shaft in the radial line direction of the tightening shaft distribution circle through a bolt support which is fixedly arranged on the periphery of the tightening shaft, and a positioning block with selectable thickness is arranged between a bolt cap of the adjusting bolt and the adjusting nut. It can be known that reducing is realized through screw-thread fit's adjusting bolt and adjusting nut, needs the manual work to adjust, and the flow of reducing regulation each time is loaded down with trivial details, and the structure is complicated, but also can only circumferential diameter direction adjust.

(2) Set up flexible subassembly in the frame, the one end of telescopic shaft cylinder is passed through the support and is connected with the frame, flexible subassembly can be through the telescopic shaft cylinder about the direction of perpendicular frame is telescopic motion, flexible subassembly has at least one, still be equipped with reducing angle change subassembly and angle change cylinder in the frame, reducing angle change subassembly has two at least, it is fixed that the one end that the central one end of frame is close to reducing angle change subassembly, it can follow this fixed point rotation to change the angle cylinder to promote the reducing angle change subassembly other end, do angle change motion, the reducing angle change subassembly can be followed the frame center and is made the diameter change motion on the straight line that the reducing angle change subassembly other end links into. Therefore, the variable-diameter variable-angle assembly and the variable-angle cylinder are adjusted, the two positions can be only changed by pushing the cylinder, and the precision is not high.

(3) A plurality of moving modules are arranged and connected with an air cylinder for controlling and changing the positions of the moving modules so as to adjust the included angle between every two shafts. The motor and the screw rod drive the tightening shaft to move to realize the reducing function, however, the angle adjustment of the air cylinder is realized, the motor and the screw rod drive the tightening shaft to move, the transformation mode needs the air cylinder to drive the cylinder diameter to be larger, the matching requirement of each driving element is higher, the transformation angle is single, and the screw rod drives the single-shaft motion.

(4) The device comprises a cam disc, a plurality of tightening shafts or a plurality of pressing heads, a plurality of cam grooves arranged on the disc surface of the cam disc, a cam disc positioning and supporting mechanism, a servo mechanism and a plurality of guide mechanisms, wherein the cam disc can freely rotate around the centers of the tightening shafts or the pressing heads, the servo mechanism drives the cam disc to rotate, the guide mechanisms are used for providing guide for radial movement of the tightening shafts and the pressing heads, a plurality of follow-up cams located in the cam grooves of the cam disc are arranged, sliding plates are fixedly connected to the tightening shafts or the pressing heads, the follow-up cams are arranged on the sliding plates, and when the servo mechanism drives the cam disc to rotate, the follow-up cams drive the tightening shafts or the pressing heads to move in the radial direction so as to realize distance change of the tightening shafts or the pressing heads. The cam disc and the cam groove move under the driving of the servo motor, the requirement on the matching precision of the cam and the cam groove is high, the processing and assembling are difficult to achieve and large, the maintenance is inconvenient, and the practical application popularization is not high.

Exemplary Multi-Axis tightening Pitch mechanism

Fig. 1 shows a three-dimensional structure of a multi-axis tightening pitch mechanism, and the multi-axis tightening pitch mechanism 10 includes: a base 100, a pitch module 200 and a first driving mechanism 300.

The base 100 may be provided in a plate-like structure to facilitate installation and connection of other components. The pitch module 200 is disposed on the base 100, and it is understood that the pitch module 200 and the base 100 may have a direct or indirect connection relationship, and the base 100 may support the pitch module 200.

The pitch module 200 comprises at least one tightening module 210, the tightening module 210 comprising a tightening shaft 211. The tightening shaft 211 can be driven to rotate by a tightening shaft motor, and a body of the tightening shaft 211 can be connected with tightening structures in different structural forms, and the tightening structures can be used for mounting or dismounting detachable fasteners such as nuts, screws, bolts and the like.

The first driving mechanism 300 is connected to the pitch modules 200, and the first driving mechanism 300 is adapted to drive at least two pitch modules 200 to move back to back or to face each other along the first direction X on the base 100. Wherein the first direction X is a non-radial direction. The radial direction here is a radial direction formed by a virtual circle made up of the plurality of tightening shafts 211, the center of the radial direction being the center of a distribution circle made up of the plurality of tightening shafts 211. The back and forward movements may be summarized as opposite movements. It is understood that the first direction X does not pass through any one diameter of the reference circle formed by the plurality of tightening shafts 211. For example, the first direction X may be a chord length direction, such that at least two pitch modules 200 are driven by the first driving mechanism 300 to perform reverse motions in the chord length direction, so as to adjust the radius of the distribution circle of the plurality of tightening shafts 211. The operation form of the pitch varying module 200 may be a linear motion, which is easier to implement and simplify the structure. The reverse movements of at least two pitch modules 200 can also be synchronized, which can improve efficiency and simplify the structure.

Further, the first driving mechanism 300 drives at least two pitch modules 200 to perform linear motion in the first direction X in opposite directions, so that the distance between the two pitch modules 200 is shortened or increased in an axisymmetric manner, thereby achieving the purpose of reducing the diameter, and the first driving mechanism is simple in structure and easy to implement, so that the plurality of tightening shafts 211 can be used for mounting and dismounting a plurality of axisymmetric fasteners.

Further, as shown in fig. 2, the pitch module 200 further includes: the second driving mechanism 220, the second driving mechanism 220 is connected with the tightening module 210, and the second driving mechanism 220 is suitable for driving the tightening module 210 to move along the second direction Y, so that the tightening module 210 can adjust the distance in the second direction Y under the driving of the second driving mechanism 220, and the purpose of reducing the diameter in the second direction Y is achieved. The second direction Y is a non-radial direction, and an included angle is formed between the second direction Y and the first direction X, that is, the first direction X is not parallel to the second direction Y, and the included angle formed between the first direction X and the second direction Y may be 90 °. The first direction X may be disposed along an X-axis of a coordinate system, and the second direction Y may be disposed along a Y-axis of the coordinate system.

Furthermore, the second driving mechanism 220 is connected to the two tightening modules 210 respectively to drive the two tightening modules 210 to move back to back or towards each other along the second direction Y, so that the non-equally symmetrical fasteners distributed circumferentially can be mounted and dismounted.

Further, the first driving mechanism 300 and the second driving mechanism 220 each include: the power output module and the linear output module are connected. The power output module is used for providing power, such as a hydraulic cylinder, an air cylinder and a motor, wherein the hydraulic cylinder and the air cylinder can be directly connected with the linear output module, and the linear output module can be an expansion link of the air cylinder, so that the linear output module can realize linear motion.

The linear output module of the first driving mechanism 220 is connected to the pitch varying module 200 so that the pitch varying module 200 linearly moves in the first direction X, and the linear output module of the second driving mechanism 220 is connected to the tightening module 210 so that the tightening module 210 linearly moves in the second direction Y. The pitch module 200 and the tightening module 210 in the form of linear motion are easier to implement and simplify the structure.

The motor outputs rotary motion, so that the motor can be indirectly connected with the linear output module, and the linear output module can realize linear motion.

Further, the power output module may include: the device comprises a motor and a transmission mechanism, wherein the motor is provided with a rotation output end. It will be appreciated that when the power take-off module includes a rotary output, for example, the power take-off module is an electric motor, a transmission mechanism is required, and the transmission mechanism is connected with the rotary output and the linear output module, so that the linear output module converts the rotation into an outputtable linear motion.

When the power output module includes a motor and a transmission mechanism, the linear output module may include: the screw rod is provided with a threaded section, the transmission mechanism is partially arranged at the rotating output end and partially arranged on the power output module and a polished rod of the screw rod, so that the power output module can drive the screw rod to rotate, the nut seat is in threaded connection with the threaded section, the rotating motion form of the screw rod can be converted into the linear motion of the nut seat, and the nut seat is connected with the variable pitch module 200 or the screwing module 210, so that the variable pitch module 200 or the screwing module 210 can perform the linear motion. Wherein, the thread section can be set as one, and each thread section can be connected with a variable-pitch module 200 or a tightening module 210 through a nut seat. Or the two thread sections are arranged at intervals in the axial direction, and the screw threads of the two thread sections have opposite rotating directions, namely the rotating directions of the screw threads of the two nut seats connected to one lead screw are opposite, so that the two nut seats can linearly move along the axial direction of the lead screw in opposite directions.

Specifically, two screw thread sections of the screw rod of the first driving mechanism 300 and two screw thread sections of the screw rod of the second driving mechanism 220 can be arranged, so that a four-axis tightening pitch-variable mechanism is formed, and tightening or dismantling of fasteners which are distributed on the circumference in a non-equally-distributed manner can be realized.

The transmission mechanism includes: the driving gear is connected with the power output module, the driven gear is sleeved on a polished rod of the screw rod and is connected with the driving gear in a meshed mode, the driving gear can drive the driven gear to rotate in the rotating process along with the rotating motion output by the power output end, and then the driven gear drives the screw rod to rotate. The screw rod is driven to rotate through gear transmission, the structure is simple and reliable, the rotation of the screw rod is more stable, and the purpose of accurately controlling the screwing module 210 or the variable pitch module 300 to perform linear motion is achieved.

Set up a screw thread section on first actuating mechanism 300's the lead screw, then need a plurality of motors, every motor can drive a lead screw and rotate to every lead screw can drive a displacement module 200 and carry out linear motion on first direction X, finally reach a plurality of displacement modules 200 and all can carry out linear motion on first direction X, thereby can realize adopting the multiaxis to screw up or dismantle the fastener, no longer describe here any more.

Fig. 2 shows a partial three-dimensional structure of a multi-axis tightening pitch-varying mechanism, as shown in fig. 2, a base 100 is provided with a limiting hole 110, and the limiting hole 110 can serve the purpose of limiting the range of the pitch-varying mechanism, so that the limiting hole 110 can be configured as a square hole. The pitch module 200 further includes: the variable pitch mounting plate 230, the variable pitch mounting plate 230 may be a rectangular plate, the variable pitch mounting plate 230 has a sliding slot 231, the sliding slot 231 may be a square hole, and the sliding slot 231 is opposite to the limiting hole 110. The tightening shaft 211 penetrates through the tightening shaft mounting plate 213, the sliding groove 231 and the limiting hole 110, the tightening module 210 further includes the tightening shaft mounting plate 213, the tightening shaft mounting plate 213 is a plate structure with a certain thickness, the ridges on the two opposite sides of the bottom of the tightening shaft mounting plate 213 are respectively provided with rectangular notches, each notch includes a top wall and a side wall, the top wall of each notch overlaps the edge of the sliding groove 231 on the two opposite sides of the sliding groove 231, and the side walls of each notch contact the inner side wall of the sliding groove 231, so that the tightening shaft mounting plate 213 is slidably connected with the sliding groove 231 in the second direction Y.

The multi-axis tightening pitch change mechanism 10 further includes: the guide rails 400 are disposed on two opposite sides of the base 100, and the guide rails 400 extend in the first direction X. Wherein, the pitch module 200 is slidably connected to the guide rail 400. The guide rail 400 is used for guiding the pitch module 200, and a slider is usually disposed to cooperate with the guide rail 400 to realize the movement along the guide rail 400, which is not described herein.

Further, fig. 3 shows a top view structure of a multi-axis tightening pitch mechanism, and for convenience of description and sufficient understanding, the first driving mechanism 300 may specifically include: the first motor 310 is provided with a first rotating output end, the first lead screw 320 is provided with a first thread section 321 and a second thread section 323 which are axially arranged at intervals, and the thread directions of the first thread section 321 and the second thread section 323 are opposite. The first transmission mechanism 330 includes a first driving gear 331 and a first driven gear 333, the first driving gear 331 is disposed at the first rotation output end, the first driven gear 333 is disposed on the polish rod of the first lead screw 320, so that the first rotation output end can drive the first lead screw 320 to rotate, the two first nut seats 340 are respectively in threaded connection with the first threaded section 321 and the second threaded section 323, the thread directions of the two first nut seats 340 are opposite, and the first nut seats 340 are connected with the pitch varying module 200. Two slide grooves 231 are provided in the pitch-variable mounting plate 230 corresponding to the two thread segments. The two ends of the first lead screw 320 are respectively provided with a first supporting structure 500, the first supporting structure 500 comprises a support and a bearing, and the first lead screw 320 is connected with the bearing so as to be capable of rotating.

As further shown in conjunction with fig. 2, the second drive mechanism 220 includes: the second motor 221 has a second rotary output, the second lead screw 223 has a first thread portion 2231 and a second thread portion 2233, the second thread portion 2233 has a thread direction opposite to that of the first thread portion 2231, the second thread portion 2233 is threaded onto one second nut seat 227, and the thread directions of the two second nut seats 227 are opposite to each other, so that the two tightening modules 210 can be synchronously moved in the second direction Y in a linear reverse direction. The second support structures 229 are respectively disposed at both ends of the second lead screw 223, the second support structures 229 include a support and a bearing, and the second lead screw 223 is connected with the bearing to be rotatable.

The second lead screw 223 is connected to the first driving mechanism 300 such that the second lead screw 223 can perform a linear motion in the first direction X. Specifically, one end of the second lead screw 223 is connected to the first nut seat 340 sleeved on the first lead screw 320 of the first driving mechanism 300, so that the linear motion of the first nut seat 340 on the first lead screw 320 can drive the pitch-varying mechanism 200 to move linearly along the first direction X. The second transmission mechanism 225 has the same structure as the first transmission mechanism 330, and will not be described herein, and the second transmission mechanism 225 is configured to enable the rotation output end to drive the second lead screw 223 to rotate. The second nut seat 227 is threadedly coupled to the first threaded portion 2231, and the second nut seat 227 is coupled to the tightening module 210. It can be seen that when a plurality of thread sections are provided on the screw rod, for example, two thread sections are provided on the screw rod, the screw rod can drive two tightening modules 210 or two variable pitch modules 300 to synchronously move in opposite directions linearly under the driving of the transmission mechanism.

Exemplary Multi-axial tightening device

This multiaxis tightening device includes: the multi-axis tightening mechanism of any of the embodiments. The multi-shaft tightening device further comprises a control module, and the control module can acquire the variable diameter information to control the multi-shaft tightening mechanism to perform corresponding actions according to needs. The motors of the first driving mechanism 300 and the second driving mechanism 220 are all servo motors, and the servo motors are in communication connection with the control module, so that the servo motors can acquire the variable diameter information of the control module, and the servo motors control the linear motion distance of the variable distance module 200 or the tightening module 210 according to the variable diameter information, so as to achieve the purpose of accurate control.

The multi-shaft screwing mechanism comprises a base 100, two guide rails 400 are respectively installed on two opposite sides of the base 100, each guide rail 400 is a linear guide rail in the first direction X, two sliding blocks are arranged on each guide rail 400, each sliding block is connected with the corresponding guide rail 400 in the first direction X in a sliding mode, and each sliding block is connected with one variable pitch module 200. The two ends of the variable pitch module 200 are respectively connected with the first nut seats 340, the internal threads of the two first nut seats 340 are opposite in rotating direction and the thread pitches are the same, a positive and negative screw rod passes through the two first nut seats 340, the positive and negative screw rod is the first screw rod 320, the thread pitches of the first screw rod 320 are the same, and the two ends of the first screw rod 320 are respectively provided with a support seat with a bearing, so that the first screw rod 320 can rotate. The first lead screw 320 is referred to as an X-axis pitch lead screw. A gear is arranged in the middle of the first lead screw 320 and is a driven gear, a servo motor provided with driving gears with the same modulus is connected right above the driven gear, and the servo motor is arranged on a motor mounting seat. The servo motor rotates to drive the first lead screw 320 to rotate, and the two first nut seats 340 connected to the two pitch modules 200 are in one-to-one correspondence with the pitch modules in opposite rotation directions, so that the pitch modules synchronously move in opposite directions in the first direction X. The pitch module 200 is provided with a pitch mounting plate 230, two square holes with symmetrical sizes are formed on the pitch mounting plate 230 as sliding grooves 231, a tightening shaft mounting plate 213 is installed in each square hole, and notches are formed at opposite sides of the tightening shaft mounting plate 213 to form sliding grooves, so that the tightening shaft mounting plate 213 can slide in the second direction Y in the square holes of the pitch mounting plate 230. Each tightening shaft mounting plate 213 is provided with a tightening shaft 211, and the tightening shafts 211 are driven by a tightening servomotor. Two tightening modules 210 are mounted on a pitch mounting plate 230, and the tightening modules 210 are composed of a tightening shaft mounting plate 213 and a tightening shaft 211. One side of the tightening shaft mounting plate 213 is provided with a second nut seat 227, the internal threads of the two second nut seats 227 have opposite directions and the same thread pitch, one positive and negative screw rod passes through the two second nut seats 227 and is named as a second screw rod 223, the thread pitches of the second screw rod 223 are the same, two ends of the second screw rod 223 are respectively provided with a support seat, and the support seats for supporting the second screw rod 223 are connected with the first nut seats 340. A driven gear is arranged at one end of the second lead screw 223, a servo motor provided with a driving gear with the same modulus is connected right above the driven gear, the servo motor is arranged on the motor mounting seat, and the servo motor rotates to drive the second lead screw 223 to rotate. Due to the opposite rotation directions of the internal threads of the two second nut holders 227 connected to the two tightening shaft mounting plates 213 in a one-to-one correspondence, the two tightening modules 210 on the pitch module 200 are synchronously moved in opposite directions.

Fig. 4 to 9 show a variable diameter process method for different reference circles of a multi-axis screwing pitch-varying mechanism, which comprises six process methods, wherein the nut clamping and installation of different reference circles can be adapted by the linkage of double-layer servo motors of an X axis and a Y axis and the linkage of a left screw rod and a right screw rod, and the automatic switching of nut screwing of different reference circles can be realized; after confirming the upgoing material tire kind, can fast switch to the assembly reducing mode that can the adaptation, realize quick production, the production of mixing the line, consequently be applicable to multiple material small batch fast production: after the parameters of the types of the uplink tires are obtained, the tightening parameters including the tightening force, the tightening times and the tightening shaft distribution mode can be automatically adjusted in a central control system, the purpose of automatically and intelligently switching tightening processes is achieved, intelligent high-efficiency flexible production can be realized, nuts of different nut reference circles can be screwed, the diameter-changing range can be automatically adjusted, the diameter-changing range is large, and the diameters of two symmetric shafts are synchronous.

The variable-diameter variable-pitch structure adopts double-layer positive and negative lead screw driving, and large-variable-pitch high-precision synchronous transformation can be achieved.

The application occasion of the variable-diameter variable-pitch structure in the application is tire nut screwing, but the structure is not limited to tire screwing, and the structure can also be applied to other screwing modes with various nuts distributed circumferentially.

According to the nut screwing device, the nuts which are distributed on the circumference in the non-equal division symmetrical mode can be automatically screwed, and the nuts can be flexibly and intelligently screwed.

According to the above description, the present application has the following advantages:

1. the variable diameter purpose is realized through the distance change in the chord length direction, the whole structure is simple, the implementation is easy, and the multiple tightening shafts can realize the installation and the disassembly of a plurality of axisymmetric fastening pieces;

2. the variable diameter purpose is realized through the distance change in different chord length directions, and the variable diameter range is further expanded;

3. the variable pitch is realized according to the variable diameter information, and the purposes of flexibility and automation of adjusting the variable diameter range are achieved.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.

Claims (10)

1. A multi-axis tightening pitch mechanism, comprising:

a base (100);

a plurality of pitch modules (200) provided on the base (100), the pitch modules (200) comprising at least one tightening module (210), the tightening module (210) comprising a tightening shaft (211);

a first driving mechanism (300) connected to the pitch modules (200), the first driving mechanism (300) being adapted to drive at least two of the pitch modules (200) to move back to back or towards each other on the base (100) in a first direction (X);

wherein the first direction (X) is a non-radial direction.

2. The multi-axis tightening pitch mechanism of claim 1, wherein the pitch module (200) further comprises:

-a second driving mechanism (220) connected to said tightening module (210), said second driving mechanism (220) being adapted to drive said tightening module (210) in a second direction (Y);

the second direction (Y) is a non-radial direction, and an included angle is formed between the second direction (Y) and the first direction (X).

3. The multi-axis tightening pitch mechanism of claim 2, wherein the second drive mechanism (220) is connected to each of the two tightening modules (210) to drive the two tightening modules to move back to back or toward each other in the second direction (Y).

4. The multi-axis tightening pitch mechanism of claim 2, wherein the first drive mechanism (300) and the second drive mechanism (220) each comprise:

a power take-off module; and

the linear output module is connected with the power output module;

wherein the linear output module of the first driving mechanism (300) is connected with the pitch module (200) to linearly move the pitch module (200) in the first direction (X), and the linear output module of the second driving mechanism (220) is connected with the tightening module (210) to linearly move the tightening module (210) in the second direction (Y).

5. The multi-axial tightening pitch mechanism of claim 4, wherein the power take-off module comprises:

a motor having a rotational output; and

and the transmission mechanism is connected with the rotation output end and the linear output module, so that the linear output module converts rotation into rectilinear motion capable of being output.

6. The multi-axis tightening pitch mechanism of claim 5, wherein the linear output module comprises:

a lead screw having a threaded section; and

a nut seat in threaded connection with the threaded section, the nut seat being connected with the pitch module (200) or the tightening module (210);

the transmission mechanism is partially arranged on a polished rod of the lead screw; the thread section is one, or the thread section is two, the two thread sections are arranged at intervals in the axial direction, and the thread directions of the two thread sections are opposite.

7. The multi-axis tightening pitch-changing mechanism according to claim 5 or 6, wherein the motor is a servo motor, and the servo motor is adapted to obtain diameter-changing information and control the corresponding pitch-changing module or the tightening module to perform corresponding actions according to the diameter-changing information.

8. The multi-axial tightening pitch mechanism according to any one of claims 2 to 6, wherein the base (100) has a stopper hole (110) thereon, and the pitch module (200) further comprises:

a variable-pitch mounting plate (230) having a slide groove (231) facing the stopper hole (110);

wherein the tightening module (210) further comprises a tightening shaft mounting plate (213), the tightening shaft (211) penetrates through the tightening shaft mounting plate (213), the sliding groove (231), and the limiting hole (110), and the tightening shaft mounting plate (213) is slidably connected with the sliding groove (231) in the second direction (Y).

9. The multi-axis tightening pitch mechanism of any one of claims 1 to 6, further comprising:

guide rails (400) provided at opposite sides of the base (100), the guide rails (400) extending in the first direction (X);

wherein the pitch module (200) is slidably connected with the guide rail (400).

10. A multi-axis tightening device, comprising:

the multi-axis tightening mechanism of any one of claims 1 to 9.

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