Double-floating nut lead screw driving butt joint device and rapid die changing device based on full-automatic energy combination connection

Abstract

The invention discloses a double-floating nut lead screw driving butt joint device and a quick die changing device based on full-automatic energy combination connection, the double-floating nut lead screw driving butt joint device comprises a die side plug-in plate, an equipment side plug-in plate and a butt joint mechanism connected with the equipment side plug-in plate, and a plurality of female joints are integrated at the die side plug-in plate; a first floating nut is arranged in the middle of the mold side plug-in plate, a plurality of male connectors corresponding to the female connectors are integrated at the position of the equipment side plug-in plate, the butt joint mechanism comprises a base, the base is kept fixed, and a second floating nut is arranged in the middle of the base; the motor is arranged on one side, far away from the equipment side plug board, of the base; the pair of guide columns are fixed with the driving motor, and the other ends of the guide columns penetrate through the base and are connected with the equipment side plug board; and one end of the lead screw is connected with the driving motor through a coupler, the other end of the lead screw sequentially penetrates through the second floating nut and the equipment side plug-in plate and extends to the outer side of the equipment side plug-in plate, and the driving motor drives the lead screw to rotate so that the male connector and the female connector can be plugged in a plug-in mode.

Description

Technical Field

[0001] The present invention relates to the technical field of energy joint docking, and in particular to a double floating nut lead screw driven docking device and a quick mold changing device based on full-automatic energy combination connection. Background Art

[0002] In the screw-nut mechanism, some mechanisms have guide rails that are bent and deformed due to insufficient rigidity when overloaded, which can cause large misalignment between the screw and the nut. In addition, in some application areas, the nut and the screw are installed on different equipment. Due to processing and assembly errors, the screw and the nut also have large misalignment. Therefore, during the transmission process, the screw is bent by radial force or excessive transmission, and sometimes even cannot achieve power transmission. Therefore, it is necessary to develop a new floating nut so that the transmission process is not affected by misalignment caused by structural deformation or assembly deviation.

[0003] Patent number CN106763605A discloses a floating nut mechanism, in which the lifting block is fixedly connected to the connecting bracket, and the pin is fixed to the outer surface of the connecting bracket by a pin; the inner hole of the joint bearing is sleeved on the pin, and the external threaded rod of the joint bearing passes through the through hole of the nut seat and is connected by a hexagonal nut; there are lower spherical washers and upper spherical washers between the nut seat and the joint bearing and the hexagonal nut respectively; the transmission nut is fixed in the nut seat, and the transmission nut is sleeved on the screw. The invention uses a swing mechanism composed of joint bearings to achieve two-way floating of the nut, which can eliminate the non-concentricity error between the screw and the nut during the transmission process, and is particularly suitable for heavy loads, insufficient mechanism rigidity, and large processing errors.

[0004] The prior art has the following defects:

[0005] 1) Most drive locking devices have separate drive and locking functions, which are complex in structure and cannot meet the drive locking requirements in limited space.

[0006] 2) Most floating nuts on the market float in one or two degrees of freedom, or can only float in a single direction. The assembly accuracy requirements are still very high and are not suitable for large and complex assembly application scenarios.

[0007] 3) The existing large plug-in plates are driven by traditional oil cylinders and air cylinders during the plug-in process, which results in large impact force, instability, loud noise, and easy deformation of the structure, which affects the service life of the plug-in. Summary of the invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a double floating nut lead screw driven docking device and a quick mold changing device based on a fully automatic energy combination connection.

[0009] The present invention is achieved through the following technical solutions:

[0010] A double floating nut lead screw driven docking device comprises a mold side plug plate, an equipment side plug plate and a docking mechanism connected to the equipment side plug plate, a plurality of female joints are integrated at the mold side plug plate, a floating nut 1 is provided in the middle of the mold side plug plate, a plurality of male joints corresponding to the female joints are integrated at the equipment side plug plate, and the docking mechanism comprises:

[0011] The base is kept fixed and a floating nut 2 is provided in the middle of the base;

[0012] The driving motor is arranged on a side of the base away from the device and facing the plug board;

[0013] A pair of guide posts, both of which are fixed to the drive motor, and the other end of the guide post passes through the base and is connected to the side plug plate of the device;

[0014] One end of the lead screw is connected to the drive motor through a coupling, and the other end passes through floating nut 2 and the device side plug plate in sequence and extends to the outside of the device side plug plate. The drive motor drives the lead screw to rotate so that the male connector and the female connector are plugged in.

[0015] The technical solution is further configured that the device side further includes a floating adjustment mechanism at the plug board, and the floating adjustment mechanism includes:

[0016] An adjustment hole, which runs through the middle of the plug plate on the device side;

[0017] A floating block is arranged in the adjusting hole with a certain gap between the floating block and the adjusting hole, and the cross section of the floating block is a "T"-shaped structure;

[0018] A bushing is arranged inside the floating block, and the lead screw passes through the bushing and extends to the outside of the plug plate on the equipment side;

[0019] The adapter plate is arranged on the end surface of the device side facing the plug plate close to the base. The adapter plate is used to axially fix the floating block. The other end of the guide column is connected to the adapter plate.

[0020] The technical solution is further configured such that the adapter plate is further provided with a buffer mechanism on one end surface close to the base, and the buffer mechanism comprises:

[0021] Buffer grooves: the adapter plate is evenly provided with a plurality of buffer grooves on one end surface close to the base;

[0022] A cover plate is connected to the adapter plate, and a plurality of guide holes corresponding to the buffer grooves are penetrated through the cover plate, and the diameter of the guide holes is smaller than the diameter of the buffer grooves;

[0023] The spring shell is hollow inside, and the spring shell is arranged in the buffer groove and the guide hole, and the end of the spring shell can move left and right in the buffer groove;

[0024] A buffer spring has one end in contact with the inner wall of the buffer groove and the other end in contact with the spring housing.

[0025] The technical solution is further configured as follows: a guide locking sleeve is further provided at the mold side plug plate, the guide locking sleeve is a pair and are respectively located above and below the floating nut, and an approach piece is further provided at the top of the mold side plug plate on one side close to the device side plug plate; a guide locking piece is further provided at the position of the device side plug plate corresponding to the guide locking sleeve, and a proximity switch is further provided at the top of the device side plug plate on one side close to the mold side plug plate.

[0026] The technical solution is further configured as follows: the mold side facing plug plate is provided with a limiting groove in the middle part of a side away from the equipment side facing plug plate, and a first through hole runs through the middle part of the limiting groove, and the floating nut 1 includes a first limiting ring and a second limiting ring fixed to both sides of the mold side facing plug plate by locking screws, the second limiting ring is located on the outer side of the limiting groove, and the second limiting ring is also provided with an axial groove on the side close to the limiting groove, and two circumferential grooves are symmetrically provided on the inner side of the axial groove; the floating nut 1 also includes a screw nut, the screw nut includes a main body end and a convex end, the convex end is located in the limiting groove and the axial groove, the main body end is located in the first through hole and the first limiting ring, and the outer end surface of the convex end is evenly concave with a plurality of mounting grooves, a spring 1 is provided in the mounting groove, and two spring seats are symmetrically fixed on the outer wall of the convex end, the spring seat is an L-shaped structure, the spring seat is located in the circumferential groove, and a spring 2 is provided between the spring seat and the inner wall of the circumferential groove.

[0027] The technical solution is further configured as follows: the second floating nut has the same structure as the first floating nut and the installation directions of the second floating nut and the first floating nut are opposite.

[0028] The technical solution is further configured to include a connecting section, a first thread section, a buffer section, and a second thread section in sequence along the length direction of the lead screw, wherein the buffer section is arranged inside the device side plug plate, and the second thread section is arranged outside the device side plug plate;

[0029] In the initial state, the first thread segment is screwed with the second thread of the floating nut, and the second thread segment is not screwed with the first floating nut; in the inserted state, the first thread segment is not screwed with the second thread of the floating nut, the connecting section is located inside the second floating nut, and the second thread segment is screwed with the first floating nut.

[0030] A quick mold changing device based on fully automatic energy combination connection, comprising the above-mentioned double floating nut lead screw drive locking device, further comprising:

[0031] The mold changing mechanism includes a mold changing platform and a mold arranged on the upper end thereof, the mold changing platform can drive the mold to move in the front and rear directions, and the mold side insert plate is fixed to the front end of the back plate of the mold;

[0032] The injection molding machine comprises a fixed side of the injection molding machine arranged on one side of the mold changing platform and a movable side of the injection molding machine arranged on the other side of the mold changing platform. The movable side of the injection molding machine can approach or move away from the fixed side of the injection molding machine. The front ends of the fixed side of the injection molding machine and the movable side of the injection molding machine are fixed with docking mechanisms.

[0033] The technical solution is further configured that the mold changing platform includes:

[0034] a support member configured to be disposed on the ground;

[0035] A pair of sliding rails, both of which are arranged at the upper end of the supporting member;

[0036] The rollers are evenly provided with a plurality of roller installation grooves along the length direction of the sliding track, the rollers are arranged in the roller installation grooves, and the plurality of rollers are powered by a driving motor.

[0037] The present invention discloses a double floating nut lead screw drive docking device and a quick mold changing device based on full-automatic energy combination connection. Compared with the prior art:

[0038] 1) Provide a four-degree-of-freedom floating nut that can meet most screw-in propulsion scenarios with floating requirements;

[0039] 2) Unique double floating nut design achieves perfect unity of large-load bidirectional driving and locking;

[0040] 3) In the scenario of large-scale plug-in board connection and separation, the use of double floating nuts combined with the screw-driven locking design can greatly improve the stability of connection and separation, reduce the strength requirements of the equipment installation structure, improve work efficiency, and extend service life.

[0041] 4) By adding a buffer spring design, the final stage of the screw screwing movement is decelerated, so that the screw movement stops smoothly, which greatly improves the force stability of the thread screwing, avoids the heating and wear of the thread caused by emergency stop, and increases the service life of the equipment.

[0042] 5) The invention adopts a hydraulic motor + a screw-driven locking device to connect and separate the energy source to the plug plate, and the mold changing process is smooth, reliable and impact-free.

[0043] 6) The invention adopts a rolling slide rail to smoothly advance the mold, which is simple, efficient and stable;

[0044] 7) The side-mounted energy plug-in and modular design make it easy to install and maintain, making it very suitable for market-wide promotion;

[0045] 8) The structure is compact, and the mold change time is greatly reduced to less than 6 minutes, which can greatly improve the mold change efficiency, completely liberate the potential of the injection molding machine to have multiple molds in one day, and greatly improve equipment utilization and product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0047] Figure 2 This is a front view of the initial state of the first embodiment of the present invention.

[0048] Figure 3 It is a cross-sectional view of the initial state of the first embodiment of the present invention.

[0049] Figure 4 for Figure 3 Enlarged view of side A.

[0050] Figure 5 It is a schematic diagram of the locking state of the first embodiment of the present invention.

[0051] Figure 6 It is a cross-sectional view of a locking state of an embodiment of the present invention.

[0052] Figure 7 for Figure 6 Enlarged view of side B.

[0053] Figure 8 It is a cross-sectional view of the insert plate from the mold side according to the first embodiment of the present invention.

[0054] Fig. 9 This is a schematic structural diagram of a floating nut 1 according to Embodiment 1 of the present invention.

[0055] Fig.10 It is a cross-sectional view of a floating nut 1 according to an embodiment of the present invention.

[0056] Fig.11 It is a cross-sectional view of the second limiting ring of the first embodiment of the present invention.

[0057] Fig.12 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0058] Fig.13 It is a structural schematic diagram of the mold changing platform of the second embodiment of the present invention.

[0059] The numbers and letters in the figure represent the corresponding component names:

[0060] Among them: 10, mold side plug-in plate; 20, equipment side plug-in plate; 30, docking mechanism; 50, mold changing mechanism; 60, mold; 70, injection molding machine; 101, floating nut one; 101a, first limit ring; 101b, second limit ring; 101c, axial groove; 101d, circumferential groove; 101e, screw nut; 101f, installation groove; 101g, spring one; 101h, spring seat; 101i, spring two; 101j, limit block; 102, guide locking sleeve; 103, proximity member; 104, limit groove; 105, first through hole; 201, guide locking member; 202, proximity switch; 301, base; 302, drive motor; 303, guide column; 304, floating nut 2; 305, lead screw; 305a, connecting section; 305b, first thread section; 305c, buffer section; 305d, second thread section; 306, motor mounting plate; 307, bracket; 401, adjustment hole; 402, floating block; 403, bushing; 404, adapter plate; 405, buffer groove; 406, cover plate; 407, spring shell; 408, buffer spring; 501, mold changing platform; 502, supporting member; 503, sliding track; 504, roller; 505, roller mounting groove; 506, driving motor; 601, back plate; 701, fixed side of injection molding machine; 702, moving side of injection molding machine. DETAILED DESCRIPTION

[0061] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0062] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0063] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside", etc. appear to indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0064] Embodiment 1:

[0065] See also Figures 1 to 11As shown, the present invention discloses a double floating nut lead screw driven docking device, comprising a mold side plug plate 10, an equipment side plug plate 20 and a docking mechanism 30 connected to the equipment side plug plate, wherein the mold side plug plate 10 is configured to remain stationary; a plurality of female connectors are integrated at the mold side plug plate 10, a floating nut 101 is provided in the middle of the mold side plug plate, and a plurality of male connectors corresponding to the female connectors are integrated at the equipment side plug plate 20, and the male connector and the female connector are both energy docking connectors, and the energy docking connectors may include waterway connectors, oilway connectors, electrical connectors, etc.; due to the presence of the above-mentioned docking mechanism 30 The docking mechanism 30 controls the device side plug plate 20 to approach the mold side plug plate 10 so that the male connector and the female connector complete the docking process. The docking mechanism 30 includes: a base 301, which remains fixed, and a floating nut 304 is provided in the middle of the base 301; a drive motor 302, which is arranged on the side of the base 301 away from the device side plug plate, and the drive motor 302 is used to provide a power source for the docking mechanism 30. Preferably, the drive motor 302 can be a hydraulic motor; a pair of guide columns 303, which are fixed to the drive motor 302, and the other end of the guide column 303 passes through the base 3 01 and is connected to the device side plug-in plate 20, the base 301 also has two guide holes, the two guide holes are respectively located above and below the floating nut 304, two steel ball bushings are arranged in the guide holes, and a spacer ring is arranged between the two steel ball bushings, the drive motor 302 is connected to the motor mounting plate 306, one end of the guide column 303 is fixed to the motor mounting plate 306, and the other end passes through the steel ball bushing and is connected to the device side plug-in plate 20. It is worth noting that the motor mounting plate 306 is also fixed to the bracket 307, and the bracket 307 includes two parallel columns and multiple A crossbeam is arranged between the columns, and the bracket 307 is fixed to two adjacent crossbeams by fasteners. A configuration block can also be fixed on the crossbeam. The counterweight block is used for counterweighting to ensure that the drive motor 302 does not deviate in the vertical direction. In addition, the rear side of the base 301 is also connected to a support plate through a support frame; a lead screw 305, one end of which is connected to the drive motor 302 through a coupling, and the other end passes through the floating nut 2 304 and the device side plug plate 20 in turn and extends to the outside of the device side plug plate 20. The drive motor 302 drives the lead screw 305 to rotate so that the male connector and the female connector are docked;In the above technical solution, the driving motor 302 starts to work, and controls the lead screw 305 to rotate through the coupling. Since the driving motor 302 is connected to the guide column 303, the lead screw 305 rotates to control the device side plug board 20, the driving motor 302 and the guide column 303 to move toward the mold side plug board 10 at the same time. During the movement of the device side plug board 20, the lead screw 305 also moves toward the mold side plug board 10. As the device side plug board 20 gradually approaches the mold side plug board 10, the male connector and the female connector begin to dock and plug in tightly, that is, the docking process of the mold side plug board 10 and the device side plug board 20 is completed; it is worth noting that the present technical solution adopts the floating nut 101 and the floating nut 2 304, that is, two floating nuts are used to realize the docking of the mold side plug board 10 and the device side plug board 20, and the characteristics of the floating nut are used to facilitate accurate docking. ;

[0066] See also Figures 1 to 4 As shown, the device side plug plate 20 also includes a floating adjustment mechanism, which includes: an adjustment hole 401, which runs through the middle of the device side plug plate 20; a floating block 402, which is arranged in the adjustment hole 401 and a certain gap is left between the floating block 402 and the adjustment hole 401, and the cross-section of the floating block 402 is a "T"-shaped structure. The protruding end of the floating block 402 is located on one side end surface of the device side plug plate 20 close to the base 301, so The middle of the floating block 402 is penetrated with a mounting hole for placing the bushing 403; the bushing 403 is arranged inside the floating block 402, the lead screw 305 passes through the bushing 403 and extends to the outside of the device side plug plate 20, and the bushing 403 is a steel ball bushing; the adapter plate 404 is arranged on the end surface of the device side plug plate 20 close to the base, and the adapter plate 404 is used to fix the floating block 402 axially, and the other end of the guide column is connected to the adapter plate 402; see for details Figure 4As shown, the adapter plate 404 is provided with a positioning groove in the middle of one side close to the device side plug plate 20, and the positioning groove is a circular structure, which is adapted to the raised end of the floating block 402. The adapter plate 404 is provided with a limiting installation groove in the middle of one side away from the device side plug plate 20, and the positioning groove and the limiting installation groove are also connected through a second through hole, the aperture of the second through hole is smaller than the diameter of the limiting installation groove, and the diameter of the limiting installation groove is smaller than the diameter of the positioning groove. The adapter plate 404 is covered on the outside of the raised part of the floating block 402 so that the floating block 402 will not move in the axial direction, and the floating block 402 can move in the radial direction. Therefore, the technical solution utilizes the radially movable characteristic of the floating block 402 of the floating adjustment mechanism to adapt to the floating adjustment of the floating nut 101 and the floating nut 2 304. During the rotation and movement of the lead screw 305, better adjustment can be performed, thereby meeting most of the screwing and propulsion scenarios with floating requirements.

[0067] See also Figures 3 to 7As shown, the adapter plate 404 is further provided with a buffer mechanism on one side end surface close to the base, and the buffer mechanism includes: a buffer groove 405, and the adapter plate 404 is evenly concavely provided with a plurality of buffer grooves 405 on one side end surface close to the base, and the plurality of buffer grooves 405 are evenly arranged along the circumference of the position-limiting installation groove; a cover plate 406, connected to the adapter plate 404, and having a plurality of guide holes corresponding to the buffer grooves 405 running through the cover plate 406, and the aperture of the guide hole is smaller than the aperture of the buffer groove 405, and the cover plate 406 is fastened to the adapter plate 404 by bolts, and a fourth through hole is penetrated in the middle of the cover plate 406, and the fourth through hole is for the lead screw to pass through; the spring shell 407 is hollow inside, and the spring shell 407 is arranged in the buffer groove 405 and the guide hole, and the depth of the buffer groove 405 plus the guide hole is greater than or equal to the length of the spring shell 407, and the end of the spring shell 407 can move left and right in the buffer groove 405, and the spring shell 407 is a cylindrical structure with an opening, and the end of the spring shell 407 is a ring shaped protrusion, the outer diameter of the spring housing 407 is the same as the aperture of the guide hole. Since the aperture of the buffer groove 405 is larger than the inner diameter of the guide hole, the end of the spring housing 407 can only move in the buffer groove 405. The buffer spring 408, one end of which contacts the inner wall of the buffer groove 405, and the other end contacts the inner wall of the spring housing 407. One end of the buffer spring 408 contacts the inner bottom end of the buffer groove 405, and the other end contacts the inner wall top of the spring housing 407. The purpose of the buffer mechanism is to The point is that when the mold side insert plate 10 is separated from the equipment side insert plate 20, the equipment side insert plate 20 will move toward the base 301, and the spring shell 407 will contact the left end surface of the base 301. As the lead screw 305 continues to rotate, the spring shell 407 will press the buffer spring 408, thereby providing a certain reaction force to the lead screw 305 until the cover plate 406 is in place with the base 301, and the sensor detects the signal that the insert plates are separated and in place, and the hydraulic motor stops working.

[0068] See also Figures 1 to 6As shown, the mold side plug plate 10 is also provided with a guide locking sleeve 102, the guide locking sleeve 102 is a pair and is respectively located above and below the floating nut 101, and the mold side plug plate 10 is also provided with a proximity piece 103 at the top of the side close to the device side plug plate 20; the device side plug plate 20 is also provided with a guide locking piece 201 at the position corresponding to the guide locking sleeve 102, and the device side plug plate 20 is also provided with a proximity switch 202 at the top of the side close to the mold side plug plate 10; in the above technical scheme, when the proximity switch 202 of the device side plug plate 20 contacts the proximity piece 103 of the mold side plug plate 10, it means that the two are docked in place, and the proximity switch 202 02 sends a signal to control the drive motor 302 to stop working; the guide locking sleeve 102 has a locking slope, and the guide locking member 201 is a steel ball locking mechanism. The steel ball locking mechanism is a prior art and can be selected by technicians in this field according to actual needs. In the process of the device side plug plate 20 approaching the mold side plug plate 10, the guide locking member 201 will enter the guide locking sleeve 102 for guidance. When the device side plug plate 20 and the mold side plug plate 10 are docked, the steel ball of the guide locking member 201 is ejected and abutted against the locking slope of the guide locking sleeve 102, thereby locking the mold side plug plate 10 and the device side plug plate 20.

[0069] See also Figure 3 ,、 Figures 9 to 11As shown, the mold side insert plate 10 is provided with a limiting groove 104 in the middle of the side away from the equipment side insert plate 20, and a first through hole 105 runs through the middle of the limiting groove 104. The floating nut 101 includes a first limiting ring 101a and a second limiting ring 101b fixed to both sides of the mold side insert plate 10 by locking screws, and the second limiting ring 101b is located on the outside of the limiting groove 104. The second limiting ring 101b is also provided with an axial groove 101c on the side close to the limiting groove 104, and two circumferential grooves 101d are symmetrically provided on the inner side of the axial groove 101c; the floating nut 101 also includes a screw nut 101e, and the screw nut 101e includes a main body end and a protruding end, and the protruding end Located in the limiting groove 104 and the axial groove 101c, the main body end can move left and right in the limiting groove 104, the first through hole 105 and the first limiting ring 101a, and the raised end is evenly protruded with a plurality of limiting blocks 101j on the outer wall on one side close to the main body end. The inner diameter of the axial groove 101c is larger than the inner diameter of the limiting groove 104. The limiting block 101j can only move left and right in the limiting groove 104. The setting of the limiting block 101j can reduce the collision of the lead screw nut 101e during the movement and adjustment process, thereby extending its service life; the outer end surface of the raised end is evenly concave with a plurality of mounting grooves 101f, and a spring 101g is arranged in the mounting groove 101f, and the other end of the spring 101g is connected to the limiting groove 104 The protruding end is symmetrically fixed with two spring seats 101h on the outer wall on the side away from the main body end. The spring seat 101h is an L-shaped structure. The spring seat 101h is located in the circumferential groove 101d. The vertical end of the spring seat 101h is vertically arranged with the outer wall of the main body end of the lead screw nut 101e. The horizontal end of the spring seat 101h is concavely provided with a spring positioning groove. A spring second 101i is arranged between the spring seat 101h and the inner wall of the circumferential groove 101d. One end of the spring second 101i contacts the bottom of the spring positioning groove, and the other end contacts the side wall of the circumferential groove 101d. The protruding end has a gap with the limiting groove 104 and the axial groove 101c. The spring seat 101h at the protruding end and the circumferential groove 101d There is a gap between them, and there is a gap between the main body end and the first through hole 104 and the first limiting ring 101a; in the above technical scheme, the interior of the lead screw nut 101e is penetrated by a trapezoidal thread, and the floating nut 101 realizes elastic floating with one degree of freedom through a spring 101g, and the rotational freedom of the floating nut 101 in the circumferential direction is increased by a spring 101i. Through the lead screw nut and the second limiting ring, the first through hole, the first limiting ring gap design and the limiting block, the floating nut 1 can realize floating in two planes of up, down, left and right. In this way, through the design of four degrees of freedom, it is ensured that the lead screw and the lead screw nut can be smoothly screwed in and out in a screwing scenario with assembly errors in both directions.

[0070] See also Figure 7 , Figures 9 to 11As shown, the floating nut 2 304 has the same structure as the floating nut 101 and the installation direction of the floating nut 2 304 is opposite to that of the floating nut 1 101; the base 301 is provided with a first groove on the side close to the driving motor 302, and a second groove is provided on the inner side of the first groove, and the inner diameter of the first groove is larger than the inner diameter of the second groove; the base 301 is provided with a third groove on the side close to the device side facing the plug-in board 20, and the inner diameter of the third groove is smaller than the inner diameter of the second groove, and a third through hole is provided between the second groove and the third groove, and the first limiting ring of the floating nut 2 304 is arranged in the third groove, and the second limiting ring is located in the first groove and outside the second groove. The remaining structures are not described here in detail, please refer to the specific structure of the floating nut 1, and the coupling is in the first groove.

[0071] The lead screw 305 includes a connecting section 305a, a first threaded section 305b, a buffer section 305c and a second threaded section 305d in sequence along the length direction. The buffer section 305c is arranged inside the device side plug-in plate 20, and the second threaded section 305d is located outside the device side plug-in plate 20; the cover plate 406 is provided with a limit positioning groove on one side close to the device side plug-in plate 20, and the limit positioning groove has the same inner diameter as the limit installation groove. The outer wall of the connecting end 305a is a smooth surface, and the outer wall of the buffer section 305c is a smooth surface. The middle part of the buffer section 305c has an annular protrusion, which is located in the limit installation groove and the limit positioning groove. The outer side of the buffer section 305c is also sleeved with a flat Surface thrust bearing, the plane thrust bearing is located in the limit installation groove and the limit positioning groove, and the plane thrust bearing is located on the side of the annular protrusion close to the cover plate 406; in the initial state, the first thread segment 305b is threadedly engaged with the floating nut 304, and the second thread segment 305d is not threadedly engaged with the floating nut 101; in the plug-in state, the first thread segment 305b is not threadedly engaged with the floating nut 304, the connecting segment 305a is located inside the floating nut 304, and the second thread segment 305d is threadedly engaged with the floating nut 101; it is worth noting that the end of the second thread segment 305d is a conical structure, which mainly plays a guiding role; the first thread segment and the second thread segment are both trapezoidal threads.

[0072] In the above-mentioned embodiment 1, first, after the driving motor 302 works, the coupling drives the lead screw 305 to rotate clockwise, the lead screw 305 moves, and the first threaded segment 305b at the lead screw 305 is screwed into the floating nut 304, and the lead screw 305 begins to move toward the mold side opposite to the insert plate 10. When the second threaded segment 305d of the lead screw 305 is screwed into the floating nut 1 101, the first threaded segment 305b of the lead screw 305 will gradually finish screwing with the floating nut 304, that is, the connecting segment 305a moves in the floating nut 304, and then the second threaded segment 305d of the lead screw 305 is gradually screwed into the floating nut 1 101. The side plug plate 10 is fixed. At this time, the lead screw 305 continues to move the side plug plate 20 of the device toward the side plug plate 10 of the mold. At the same time, the guide locking member 201 will gradually contact the guide locking sleeve, and gradually guide and position until the two plug plates are inserted into each other. At this time, the guide mechanism completes the guidance and also completes the precise positioning of the plug plates. At this time, the upper proximity switch contacts the proximity member, so that the proximity switch sends a signal that the insertion is in place, which is fed back to the guide locking member 201 for locking action, and at the same time fed back to the hydraulic motor to stop rotating. When the locking action is in place, the sensor of the guide locking mechanism will feed back a signal that the locking is in place, and the locking is completed. At this time, the lead screw and the lead screw nut realize self-locking through the self-locking characteristics of the trapezoidal thread itself, thereby providing a huge locking reaction force to the plug plate; when the plug plate is connected to multiple energy sources, a huge separation force appears in the middle of the plug plate. At this time, in addition to the strong locking force provided by the upper and lower locking mechanisms, the strong self-locking mechanical characteristics between the lead screw and the floating nut can also provide a strong locking force. The force stability of the plug plate under large loads is greatly improved.

[0073] When the work on the plug plate is completed and needs to be separated, at this time, first start the guide locking piece 201 to unlock. After unlocking, start the drive motor to work in reverse. At this time, the screw rotates counterclockwise. When the second threaded section of the screw and the floating nut 1 are about to be screwed out, the first threaded section and the floating nut 2 are screwed in. As the screw continues to rotate, it will continue to drive the device side plug plate to move toward the base. Subsequently, the spring shell will contact the end face of the base. As the screw continues to screw into the floating nut 2, the spring shell will press the buffer spring to provide a certain reaction force to the screw movement until the cover plate 8 is fully fitted into the base. The sensor detects the signal that the plug plate is separated and the hydraulic motor stops working.

[0074] Embodiment 2:

[0075] See also Figures 1 to 13As shown, a quick mold changing device based on fully automatic energy combination connection includes the above-mentioned double floating nut screw drive locking device, and also includes: a mold changing mechanism 50, including a mold changing platform 501 and a mold 60 arranged at its upper end, the mold changing platform 501 can drive the mold 60 to move in the front and rear directions, and the mold side plug plate 10 is fixed to the front end of the back plate 601 of the mold 60; the mold 60 includes a fixed mold and a movable mold, and the outer sides of the fixed mold and the movable mold are fixed with the back plate 601, the fixed mold and the movable mold are connected by a plurality of positioning pins, the back plate 601 is a magnetic back plate, and the mold side plug plate 10 is connected and fixed to the back plate 601 through an adapter frame; the injection molding machine 70 includes The fixed side 701 of the injection molding machine is arranged on one side of the mold changing platform 501, and the movable side 702 of the injection molding machine is arranged on the other side of the mold changing platform 501. The movable side 702 of the injection molding machine can approach or move away from the fixed side 701 of the injection molding machine. The front ends of the fixed side 701 and the movable side 702 of the injection molding machine are fixed with a docking mechanism 30; the inner sides of the fixed side 701 and the movable side 702 of the injection molding machine are provided with a magnetic template, and the magnetic template is used to magnetically attract the back plate 601 of the mold 60 to achieve rapid mold change; it is worth noting that the fixed side of the injection molding machine and the movable side of the injection molding machine are connected by the screw of the injection molding machine, and the movable side of the injection molding machine can move relative to the fixed side of the injection molding machine, which belongs to the prior art. The screw of the injection molding machine passes through the mold changing platform 501, and technicians in this field can choose it according to actual needs; in the above technical scheme, first, the mold 60 with the mold side plug plate 10 installed is hoisted from the mold library by a crane or other means and placed on the mold changing platform 501, and then the mold 60 is driven by the mold changing platform 501 to move to the injection molding machine station. When the mold 60 moves into place on the mold changing platform 501, the mold 60 is detected. The moving side 702 of the injection molding machine will move toward the fixed side 701 of the injection molding machine, stop after reaching the specified position, and then start the magnetic template to work, and use the strong magnetic force of the magnetic template to attract the back plate 601 of the mold 60, so as to fix the mold 60, or A hydraulic locking fixture can also be used to lock and fix the mold 60, and then the docking mechanism 30 works, so that the device side plug-in plate 20 gradually approaches the mold side plug-in plate 10 and the male connector and the female connector are plugged and connected, and the sensor feeds back a plug-in signal, and then mechanical locking is performed; it is worth noting that in the present technical solution, both sides of the upper end of the mold changing platform 501 are provided with limit plates, and the limit plates are used to limit the mold 60 so that the mold 60 can accurately enter the mold changing station; at the same time, how the movable mold and the fixed mold of the mold 60 are connected to the inside of the movable side and the fixed side of the injection molding machine is not described in detail herein, and this connection form is also a prior art;The back plates of the fixed side mold and the moving side mold of the technical solution are fixed to the mold side plug-in plate through the adapter bracket, and then the entire mold 60 is placed on the mold changing platform 501. The mold 60 is transported to the correct position by the mold changing platform 501, and the mold 60 is smoothly pushed forward, which is simple, efficient and stable; the energy plug-in plate installed on the side, this modular design, realizes plug-in locking through the docking mechanism 30, is easy to install and maintain; the overall structure is compact, and the mold changing time is greatly reduced to less than 6 minutes, which can greatly improve the mold changing efficiency, completely liberate the potential of the injection molding machine to have multiple molds in one day, and greatly improve the equipment utilization rate and product competitiveness; Regarding the internal pipeline part, taking the fixed side of the injection molding machine as an example, the fixed side of the injection molding machine is connected to the equipment side plug-in plate through the pipeline, and the equipment side plug-in plate and the mold side plug-in plate are docked, and then the mold side plug-in plate is connected to the corresponding mold through the pipeline to form a loop. ;

[0076] See also Fig.13 As shown, the mold changing platform 501 includes: a supporting member 502, which is configured to be set on the ground; a sliding track 503, which is a pair and both are set at the upper end of the supporting member 502; a roller 504, a plurality of roller mounting grooves 505 are evenly recessed along the length direction of the sliding track 503, and the rollers 504 are set in the roller mounting grooves 505. The plurality of rollers 504 are powered by a driving motor 506, and the driving motor 506 drives the rollers 504 to rotate. This is a prior art, and those skilled in the art can select it according to actual needs.

[0077] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double floating nut lead screw drive docking device, characterized in that: The invention comprises a mold side plug-in plate (10), an equipment side plug-in plate (20) and a docking mechanism (30) connected to the equipment side plug-in plate, wherein a plurality of female joints are integrated at the mold side plug-in plate (10), a floating nut 1 (101) is provided at the middle of the mold side plug-in plate, a plurality of male joints corresponding to the female joints are integrated at the equipment side plug-in plate (20), and the docking mechanism (30) comprises: A base (301) is kept stationary, and a second floating nut (304) is provided in the middle of the base (301); A driving motor (302) is arranged on a side of the base (301) away from the device and facing the plug board; A pair of guide posts (303) are fixed to the drive motor (302), and the other end of the guide post (303) passes through the base (301) and is connected to the device side plug board (20); The lead screw (305) has one end connected to the drive motor (302) through a coupling, and the other end passes through the second floating nut (304) and the device side plug plate (20) in sequence and extends to the outside of the device side plug plate (20). The drive motor (302) drives the lead screw (305) to rotate so that the male connector and the female connector are plugged into each other.

2. A double floating nut lead screw drive docking device according to claim 1, characterized in that: The device side facing the plug plate (20) also includes a floating adjustment mechanism, and the floating adjustment mechanism includes: An adjustment hole (401), the adjustment hole (401) passing through the middle of the device side plug board (20); A floating block (402) is arranged in the adjustment hole (401) with a certain gap between the floating block (402) and the adjustment hole (401), and the cross section of the floating block (402) is a "T"-shaped structure; A bushing (403) is arranged inside the floating block (402), and the lead screw (305) passes through the bushing (403) and extends to the outside of the plug plate (20) on the device side; The adapter plate (404) is arranged on the end surface of the device side facing the plug plate (20) close to the base. The adapter plate (404) is used to axially fix the floating block (402). The other end of the guide column is connected to the adapter plate (402).

3. A double floating nut lead screw drive docking device according to claim 2, characterized in that: The adapter plate (404) is also provided with a buffer mechanism on one end surface close to the base, and the buffer mechanism comprises: Buffer grooves (405), the adapter plate (404) is evenly provided with a plurality of buffer grooves (405) on an end surface of one side close to the base; A cover plate (406) is connected to the adapter plate (404), and a plurality of guide holes corresponding to the buffer grooves (405) are penetrated through the cover plate (406), and the diameter of the guide holes is smaller than the diameter of the buffer grooves (405); The spring shell (407) is hollow inside. The spring shell (407) is arranged in the buffer groove (405) and the guide hole. The end of the spring shell (407) can move left and right in the buffer groove (405); The buffer spring (408) has one end in contact with the inner wall of the buffer groove (405) and the other end in contact with the spring housing (407).

4. A double floating nut lead screw drive docking device according to claim 1, characterized in that: A guide locking sleeve (102) is also provided at the mold side plug plate (10), and the guide locking sleeves (102) are a pair and are respectively located above and below the floating nut (101). A proximity piece (103) is also provided at the top of the mold side plug plate (10) on the side close to the device side plug plate (20); a guide locking piece (201) is also provided at the position corresponding to the guide locking sleeve (102) of the device side plug plate (20), and a proximity switch (202) is also provided at the top of the device side plug plate (20) on the side close to the mold side plug plate (10).

5. The double floating nut lead screw drive docking device according to claim 1, characterized in that: The mold side insert plate (10) is provided with a limiting groove (104) in the middle of a side away from the device side insert plate (20), and a first through hole (105) runs through the middle of the limiting groove (104). The floating nut (101) comprises a first limiting ring (101a) and a second limiting ring (101b) fixed to both sides of the mold side insert plate (10) by locking screws, the second limiting ring (101b) is located on the outside of the limiting groove (104), and the second limiting ring (101b) is also provided with an axial groove (101c) on a side close to the limiting groove (104), and two circumferential grooves (101d) are also symmetrically provided on the inner side of the axial groove (101c). ); the floating nut 1 (101) also includes a lead screw nut (101e), the lead screw nut (101e) includes a main body end and a protruding end, the protruding end is located in the limiting groove (104) and the axial groove (101c), the outer end surface of the protruding end is evenly concave with a plurality of mounting grooves (101f), a spring 1 (101g) is arranged in the mounting groove (101f), and the outer wall of the protruding end is also symmetrically fixed with two spring seats (101h), the spring seat (101h) is an L-shaped structure, the spring seat (101h) is located in the circumferential groove (101d), and a spring 2 (101i) is arranged between the spring seat (101h) and the inner wall of the circumferential groove (101d).

6. A double floating nut lead screw drive docking device according to claim 5, characterized in that: The second floating nut (304) and the floating nut (101) have the same structure, and the installation directions of the second floating nut (304) and the first floating nut (101) are opposite.

7. A double floating nut lead screw drive docking device according to claim 6, characterized in that: The lead screw (305) includes a connecting section (305a), a first thread section (305b), a buffer section (305c) and a second thread section (305d) in sequence along the length direction thereof, wherein the buffer section (305c) is arranged inside the device side plug board (20), and the second thread section (305d) is arranged outside the device side plug board (20); In the initial state, the first thread segment (305b) is threadedly engaged with the floating nut 2 (304), and the second thread segment (305d) is not threadedly engaged with the floating nut 1 (101); in the plug-in state, the first thread segment (305b) is not threadedly engaged with the floating nut 2 (304), the connecting segment (305a) is located inside the floating nut 2 (304), and the second thread segment (305d) is threadedly engaged with the floating nut 1 (101).

8. A rapid mold changing device based on fully automatic energy combination connection, characterized in that: The double floating nut screw drive locking device according to any one of claims 1 to 7 further comprises: The mold changing mechanism (50) comprises a mold changing platform (501) and a mold (60) arranged at the upper end thereof, wherein the mold changing platform (501) can drive the mold (60) to move in the front-back direction, and the mold side insert plate (10) is fixed to the front end of the back plate (601) of the mold (60); The injection molding machine (70) comprises a fixed side (701) of the injection molding machine arranged on one side of the mold changing platform (501) and a movable side (702) of the injection molding machine arranged on the other side of the mold changing platform (501); the movable side (702) of the injection molding machine can approach or move away from the fixed side (701) of the injection molding machine, and the front ends of the fixed side (701) of the injection molding machine and the movable side (702) of the injection molding machine are both fixed with docking mechanisms (30).

9. A quick mold changing device based on fully automatic energy combination connection according to claim 8, characterized in that: The mold changing platform (501) comprises: a support member (502) configured to be disposed on the ground; A pair of sliding rails (503) are provided at the upper end of the supporting member (502); The roller (504) has a plurality of roller mounting grooves (505) evenly concavely arranged along the length direction of the sliding track (503), the roller (504) is arranged in the roller mounting grooves (505), and the plurality of rollers (504) are powered by a driving motor (506).

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