An adjustable length self-cutting pump head tube fitting assembly and method of assembly

Abstract

The application relates to a production equipment for push pumps, in particular to a pump head pipe fitting assembly device with adjustable length and self-cutting function and an assembly method. The device comprises a rotating disc, the rotating disc is provided with a feeding mechanism, an assembly mechanism and a discharging mechanism on the side, a plurality of clamping grooves are uniformly distributed on the edge of the rotating disc along the circumferential direction, the assembly mechanism comprises a pipe fitting clamp, a cutting tool, a lifting sliding table and a guide rail, the lifting sliding table is provided with a through hole along the moving direction, the assembly mechanism further comprises a coaxial alignment assembly, the coaxial alignment assembly comprises a guide bushing, the guide bushing is provided with a guide hole in communication with the through hole, and the guide rail and the lifting sliding table are respectively provided with a displacement transmitter and a displacement receiver. The inner taper surface of the guide hole guides the centering of the pump head interface, the limiting ring keeps the hose coaxial with the pump head, the pressure sensor monitors the pressure in all directions in real time, the hose is immediately released when an abnormality occurs, deformation and damage are avoided, and the plug-in success rate and assembly consistency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of production equipment for push pump, in particular to a length-adjustable self-cutting pump head pipe fitting assembly device and method. BACKGROUND

[0002] In the assembly process of pump head pipe fitting, the assembly device with adjustable length and self-cutting function is of great significance to improve production efficiency and ensure assembly quality. In the prior art, most of the assembly methods are fixed length, or through manual measurement and cutting, which not only is cumbersome and inefficient, but also easily leads to low assembly precision due to human error, affecting the subsequent use performance.

[0003] The currently disclosed Chinese patent CN115139104B discloses a push pump integrated automatic assembly machine using multiple mechanical hands to work cooperatively, which is used for assembling a push pump. The push pump includes an outer cover, a roller, a suction pipe and a pressure cover. The pressure cover is buckled on the outer cover, the outer cover is buckled on the upper end of the roller, and the suction pipe is installed on the lower end of the roller. The push pump integrated automatic assembly machine includes a workbench and a turntable. The turntable is rotatably installed on the workbench so that the turntable can rotate relative to the workbench. The first mechanical hand device, the material guide-in device, the sealing detection assembly, the outer cover pressing assembly, the positioning device, the position detection device, the second mechanical hand device, the pressure cover guide-in device, the pressure cover pressing device, the lock head device, the clip feeding device, the suction pipe cutting device, the first discharge cylinder, the discharge ejection device and the second discharge cylinder are installed around the turntable and on the workbench. The work station mounting hole on the turntable rotates once for every rotation of the turntable, realizing movement from the current work station to the next work station.

[0004] According to the above-mentioned patent, the material guide-in device sends the components to be assembled to the specified position, and the first mechanical hand grasps and places the roller in the turntable work station. After the sealing detection ensures that the roller has no leakage, the outer cover is precisely pressed on the roller. Then the second mechanical hand installs and locks the pressure cover in the correct position, and prevents the pressure cover from loosening through the clip feeding device. The suction pipe cutting device is responsible for cutting the long pipe to the appropriate length and installing it to the lower end of the roller, completing the assembly of the pump head pipe fitting.

[0005] However, the patent lacks real-time monitoring of the assembly state during the insertion of the suction pipe, and cannot automatically stop when the insertion is blocked or the alignment is deviated. If the pump head pipe port has unqualified size or does not match the suction pipe, it is easy to cause the suction pipe to be bent under pressure. If the assembly is still forced to continue, it will produce obvious quality defects, affecting the sealing performance and use performance of the product, and there is a great quality risk. Therefore, there is a need for a length-adjustable self-cutting pump head pipe fitting assembly device to real-time monitor the elongation and stress state of the hose, and realize accurate adjustment and assembly of the hose length. SUMMARY

[0006] In view of the problems of the prior art, the length-adjustable self-cutting pump head pipe fitting assembly device is provided, the inner taper surface of the guide hole guides the pump head interface to be centered, the limiting ring keeps the hose coaxial with the pump head, the pressure sensor monitors the pressure in all directions in real time, and the hose is released immediately in case of abnormality to avoid deformation and damage and improve the plug-in success rate and assembly consistency.

[0007] To solve the problems of the prior art, the length-adjustable self-cuting pump head pipe fitting assembly device is provided, which comprises a rotating disc, the rotating disc is provided with a feeding mechanism, an assembly mechanism and a discharging mechanism on the side, a plurality of clamping grooves for positioning the pump head are uniformly distributed on the edge of the rotating disc along the circumferential direction, the assembly mechanism comprises a pipe fitting clamp, a cutting tool, a lifting slide and a guide rail, the pipe fitting clamp and the cutting tool are sequentially arranged on the lifting slide from bottom to top, the lifting slide is arranged below the rotating disc and can move on the guide rail perpendicular to the surface of the rotating disc, a through hole is formed through the lifting slide along the moving direction of the lifting slide for the hose to pass through from bottom to top, the assembly mechanism further comprises a coaxial alignment assembly for keeping the pump head coaxial with the hose, the coaxial alignment assembly comprises a guide bushing, the guide bushing is fixedly arranged on the top of the lifting slide, the guide bushing has a guide hole capable of being plugged with the pump head interface and communicating with the through hole, the guide hole is coaxial with the through hole, the diameter of the guide hole is greater than that of the through hole, when the guide bushing rises to make the pump head interface inserted into the guide hole, the pump head interface is in a coaxial limiting state relative to the hose, the guide rail and the lifting slide are respectively provided with a displacement transmitter and a displacement receiver matched with each other, forming a non-contact displacement detection system.

[0008] Preferably, the coaxial alignment assembly further comprises a limiting block, the guide bushing is provided with one limiting block around, each limiting block can move radially along the guide bushing, and all the limiting blocks together form a limiting ring for positioning the part of the hose to be plugged with the pump head interface in the guide hole, the limiting ring is coaxial with the guide hole.

[0009] Preferably, the edge of the guide hole at the upper end of the guide bushing has an inner taper surface for guiding the pump head interface into the guide hole.

[0010] Preferably, the inner side of the upper end of each limiting block is provided with a slope surface, when the upper end of the hose is inserted into the pump head interface and continues to rise, all the limiting blocks are in a synchronous outward moving state under the pressing of the pump head interface along the slope surface, so that the hose can continue to extend into the pump head interface until the pump head interface contacts the lifting slide.

[0011] Preferably, one fixed plate is fixedly arranged around the guide bushing, and a compression spring is arranged between each limiting block and the corresponding fixed plate, when the limiting block moves outward, the compression spring is in a compressed state.

[0012] Preferably, the guide bush is provided with a sliding groove around the periphery for the corresponding limiting block to slide radially in the guide hole, and each limiting block is inserted into the part of the guide hole in a trapezoidal end, and each sliding groove is provided with a trapezoidal notch at the part connected with the guide hole, which is matched with the corresponding trapezoidal end to block the limiting block from pressing the hose.

[0013] Preferably, each fixed plate is provided with a pressure sensor, and the two ends of each compression spring are fixedly connected with the corresponding pressure sensor and limiting block, and the axis direction of the compression spring is parallel to the moving direction of the limiting block, and each pressure sensor is electrically connected with the pipe fitting clamp.

[0014] Preferably, the outer side of the upper end of each limiting block is fixedly provided with a movable electromagnet, and the upper end of the guide bush is fixedly provided with a fixed electromagnet around the periphery, and when the hose is inserted into the guide hole from bottom to top, the fixed electromagnet and the movable electromagnet are in the energized mutual repulsion state, so that the limiting ring is automatically opened for the hose to enter.

[0015] Preferably, a pair of the pipe fitting clamp, the cutting tool and the coaxial alignment assembly are symmetrically arranged on the lifting sliding table to form a double-station.

[0016] The application also provides a length-adjustable self-cutting pump head pipe fitting assembly method, which comprises the following steps:

[0017] S1, the rotating disc is started to send the pump head to the assembly station;

[0018] S2, the pipe fitting clamp is started to clamp the hose, and the hose is limited between the limiting blocks at the same time;

[0019] S3, the lifting sliding table is lifted, the pump head interface is first inserted into the guide hole, then the limiting blocks are pushed away, until the lifting sliding table is contacted, and the hose is inserted in place.

[0020] The application has the following beneficial effects compared with the prior art:

[0021] 1. The inner tapered surface of the guide bush guides the pump head interface to smoothly enter the guide hole, and the limiting ring formed by the limiting blocks realizes the accurate coaxial positioning of the pump head and the hose, and ensures the assembly centering. In the insertion process, the slope surface of the limiting block cooperates with the compression spring to provide space for the pump head interface and maintain stable radial constraint, which ensures smooth insertion. At the same time, the pressure sensor monitors the stress state of each limiting block in real time, and once the pressure anomaly is detected, it is determined that the hose is bent, and the control system immediately instructs the pipe fitting clamp to release the hose, effectively preventing the hose from being deformed or damaged due to eccentricity or resistance, realizing accurate centering, stable limiting and intelligent protection in the assembly process, and improving the assembly quality and reliability.

[0022] 2. The present application forms a limiting structure by the trapezoidal end of the limiting block and the trapezoidal notch of the sliding groove, effectively constraining the radial movement range of the limiting block, preventing it from moving inward excessively under the elastic force of the compression spring and invading the guide hole, avoiding applying pressure to the hose during the insertion process, thereby eliminating the risk of hose deformation due to extrusion. While ensuring that the limiting block provides stable radial constraint to the hose and maintains the coaxial centering state, it ensures that the hose can smoothly and unobstructedly complete the insertion action with the pump head interface, improving the reliability of assembly and the quality of finished products;

[0023] 3. The present application sets fixed electromagnets and movable electromagnets on the guide bushing and the limiting block, which are matched with each other, uses the repulsive force generated when electrified to drive each limiting block to move outward synchronously, so that the limiting ring automatically opens before the hose enters the guide hole, effectively preventing the upper end of the hose from deforming due to direct pressure on the limiting block.

[0024] After the hose smoothly enters the limiting ring, the electromagnet is de-energized, the limiting block is reset under the action of the compression spring, the inner diameter of the limiting ring formed is consistent with the outer diameter of the hose, forming stable limiting to the hose, ensuring that it maintains a coaxial state with the pump head. It realizes accurate positioning of the hose to be inserted, maintains coaxiality with the pump head, and improves the insertion effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a three-dimensional structural diagram of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application Figure 1 ;

[0026] Figure 2 is a three-dimensional structural diagram of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application Figure 2 ;

[0027] Figure 3 is a partial three-dimensional structural cross-section of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application Figure 1 ;

[0028] Figure 4 is a partial three-dimensional structural cross-section of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application Figure 2 ;

[0029] Figure 5 is a three-dimensional structural diagram of an assembly mechanism of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application

[0030] Figure 6 is a planar cross-sectional view of a pump head interface insertion guide hole and hose preliminary insertion of a length-adjustable self-cutting pump head pipe fitting assembly device of the present application

[0031] Figure 7It is the stereoscopic structure section view of pump head interface insertion guide hole and hose preliminary insertion of a length adjustable self-cutting pump head pipe fitting assembly device of the application;

[0032] Figure 8 It is the plane section view of pump head interface insertion guide hole and hose deep insertion of a length adjustable self-cutting pump head pipe fitting assembly device of the application;

[0033] Figure 9 It is the stereoscopic structure section view of pump head interface insertion guide hole and hose deep insertion of a length adjustable self-cutting pump head pipe fitting assembly device of the application;

[0034] Figure 10 It is the radial stereoscopic structure section view of guide bushing of a length adjustable self-cutting pump head pipe fitting assembly device of the application;

[0035] Figure 11 It is the plane section view of hose cutting of a length adjustable self-cutting pump head pipe fitting assembly device of the application;

[0036] Figure 12 It is the stereoscopic structure section view of hose cutting of a length adjustable self-cutting pump head pipe fitting assembly device of the application.

[0037] The figure mark is: 1, rotary disc; 11, clamping groove; 12, fixed ring; 2, pump head; 3, hose; 4, pipe fitting clamp; 5, cutting tool; 51, cutting groove; 52, stamping cylinder; 6, lifting slide; 61, through hole; 7, guide rail; 71, displacement transmitter; 72, displacement receiver; 73, fixed clamp; 8, coaxial alignment assembly; 81, guide bushing; 811, guide hole; 812, fixed plate; 8121, compression spring; 8122, pressure sensor; 813, sliding groove; 82, limit block; 821, trapezoidal end; 822, movable electromagnet; 823, fixed electromagnet. DETAILED DESCRIPTION

[0038] In order to further understand the features, technical means and achieved specific purposes and functions of the application, the application is described in further detail below in combination with the drawings and specific embodiments.

[0039] Reference Figures 1-9As shown, a length-adjustable self-cutting pump head pipe fitting assembly device includes a rotating disc 1, the rotating disc 1 is provided with a feeding mechanism, an assembly mechanism and a discharging mechanism on the side, the edge of the rotating disc 1 is uniformly distributed with a plurality of clamping grooves 11 for positioning the pump head 2 along the circumferential direction, wherein the assembly mechanism includes a pipe clamp 4, a cutting tool 5, a lifting slide 6 and a guide rail 7, the pipe clamp 4 and the cutting tool 5 are sequentially arranged on the lifting slide 6 from bottom to top, the lifting slide 6 is arranged below the rotating disc 1 and can move on the guide rail 7 perpendicular to the surface of the rotating disc 1, the lifting slide 6 is provided with a through hole 61 through which the hose 3 passes from bottom to top along the moving direction of the lifting slide 6, the assembly mechanism further includes a coaxial alignment assembly 8 for keeping the pump head 2 coaxial with the hose 3, the coaxial alignment assembly 8 includes a guide bushing 81, the guide bushing 81 is fixedly arranged on the top of the lifting slide 6, the guide bushing 81 has a guide hole 811 capable of being inserted into the interface of the pump head 2 and communicating with the through hole 61, the guide hole 811 is coaxial with the through hole 61, the diameter of the guide hole 811 is larger than that of the through hole 61, when the guide bushing 81 rises to make the pump head 2 interface inserted into the guide hole 811, the pump head 2 interface is in a coaxial limiting state relative to the hose 3, the guide rail 7 and the lifting slide 6 are respectively provided with a displacement transmitter 71 and a displacement receiver 72 which cooperate with each other to form a non-contact displacement detection system.

[0040] The rotating disc 1 is sleeved with a stationary ring 12 which rotates with the rotating disc 1 in a stationary state, so as to prevent the pump head 2 from being thrown out of the clamping groove 11 when the rotating disc 1 rotates. The stationary ring 12 has a feeding port and a discharging port corresponding to the clamping groove 11.

[0041] The feeding mechanism and the discharging mechanism are not shown in the figure.

[0042] The driving source for driving the rotating disc 1 to rotate is not shown in the figure.

[0043] The lower end of the guide rail 7 is provided with a fixed clamp 73 for clamping the lower hose 3 after the upper hose 3 is cut, so as to pull out the hose 3 from the fixed clamp 73 by moving the pipe clamp 4 through the lifting slide 6 in the next round of assembly, realizing continuous feeding and accurate length assembly of the hose 3.

[0044] The lifting slide 6 is provided with a cutting groove 51 for sliding the cutting tool 5 along the radial direction of the through hole 61, and the lifting slide 6 is provided with a stamping cylinder 52 for driving the cutting tool 5 to move.

[0045] When the pump head 2 is fed, the feeding mechanism inserts the pump head 2 into the clamping groove 11 on the rotating disc 1, which is kept stable under the limiting action of the stationary ring 12 and will not be thrown out of the clamping groove 11 due to centrifugal force. When the rotating disc 1 rotates the pump head 2 to the assembly station, the assembly mechanism starts to perform the assembly and length cutting operation of the pump head 2 and the hose 3.

[0046] Before the assembly of the hose 3, the upper end of the hose 3 has been inserted into the guide hole 811 of the guide bushing 81 through the through hole 61 of the lifting slide 6 in the initial lowering action of the lifting slide 6, and at this time the pump head 2 is fixed in the clamping groove 11 of the rotating disc 1 to remain stationary.

[0047] Then, the lifting slide 6 starts to move upward along the direction perpendicular to the surface of the rotating disc 1 under the guidance of the guide rail 7. During the lifting of the lifting slide 6, the hose 3 inserted into the through hole 61 of the lifting slide 6 in advance is synchronously moved upward under the clamping of the pipe clamp 4. With the continuous upward movement of the lifting slide 6, the guide bushing 81 gradually approaches and finally contacts the interface end of the pump head 2.

[0048] When the interface of the pump head 2 is inserted into the guide hole 811, the inner wall of the guide hole 811 limits the interface of the pump head 2 in the circumferential direction, forcing the axis to coincide with the axis of the through hole 61 and the internal hose 3, achieving coaxial alignment of the pump head 2 and the hose 3. It ensures that the hose 3 can be accurately inserted into the interface of the pump head 2 in the subsequent assembly process, avoiding assembly failure or poor sealing due to eccentricity.

[0049] After the guide bushing 81 completes the positioning of the pump head 2 and ensures the coaxial state, the lifting slide 6 continues to rise, so that the top end of the hose 3 gradually extends into the interior of the pump head 2 interface, until the pump head 2 interface passes through the guide hole 811 and contacts the top surface of the lifting slide 6, that is, the preset insertion depth is reached. At this time, the assembly system monitors the lifting displacement of the lifting slide 6 in real time through the non-contact displacement detection system composed of the displacement transmitter 71 and the displacement receiver 72, accurately captures the position change of the lifting slide 6, and ensures the accuracy of the insertion length of the hose 3.

[0050] When the hose 3 is inserted in place, the lifting slide 6 stops rising, and the assembly enters the cutting-off stage. At this time, the pipe clamp 4 releases the hose 3, and the lifting slide 6 descends. Through displacement monitoring, when the cutting-off tool 5 reaches the cutting-off position, the stamping cylinder 52 provided on the lifting slide 6 is started, driving the cutting-off tool 5 to slide along the radial cutting groove 51 of the lifting slide 6 to the center of the through hole 61. The cutting-off tool 5 advances under the push of the stamping cylinder 52, and the sharp edge thereof acts on the predetermined cutting-off position of the hose 3 to implement the cutting-off operation. After cutting-off is completed, the cutting-off tool 5 retreats to the initial position under the return action of the stamping cylinder 52.

[0051] Before the cutting-off operation, the fixed clamp 73 clamps the hose 3 below the cutting-off position to prevent the hose 3 from falling after being cut off. After the hose 3 is cut off, the lifting slide 6 is lowered again, so that the lower end of the hose 3 assembled with the pump head 2 is separated from the guide bushing 81.

[0052] Subsequently, the assembled hose 3 originally cut off and left above is retained in the card slot 11 together with the pump head 2, rotates out of the assembly station with the rotating disc 1 and is removed from the rotating disc 1 by the unloading mechanism. When the assembly of the next pump head 2 is carried out, after the hose 3 is clamped by the pipe clamp 4, the fixing clamp 73 is loosened, the lifting slide 6 is raised, and the hose 3 is pulled out of the fixing clamp 73 by a new length, so that a new round of assembly is carried out.

[0053] During the entire assembly process, the non-contact displacement detection system continuously monitors the displacement of the lifting slide 6 to provide accurate position feedback for the control system, ensuring that each lifting, lowering, clamping and cutting action is strictly in accordance with the preset program, thereby realizing accurate control of the length of the hose 3 and continuous, efficient and reliable automatic assembly.

[0054] Referring to Figs. 1, 2 and 3, the coaxial alignment assembly 8 comprises a guide bushing 81 and a coaxial alignment assembly 8. Figure 1 Figures 4-12 As shown in Figs. 1, 2 and 3, the coaxial alignment assembly 8 further comprises a limiting block 82, and the guide bushing 81 is provided with one limiting block 82 around it. Each limiting block 82 can move radially along the guide bushing 81, and all the limiting blocks 82 together form a limiting ring for positioning the part of the hose 3 to be inserted into the interface of the pump head 2 in the guide hole 811, and the limiting ring is coaxial with the guide hole 811.

[0055] When the lifting slide 6 moves upwards and the guide bushing 81 approaches and begins to insert into the interface of the pump head 2, the outer wall of the interface of the pump head 2 first contacts the limiting block 82 arranged around the guide bushing 81. Under the push of the interface of the pump head 2, each limiting block 82 slides radially outward synchronously to provide space for the insertion of the interface of the pump head 2.

[0056] When the interface of the pump head 2 continues to insert into the guide hole 811, the part to be inserted into the hose 3 gradually enters the limiting ring formed by all the limiting blocks 82, thereby exerting a uniform radial restraining force on the outer wall of the interface of the pump head 2, keeping the axis of the interface of the pump head 2 highly consistent with the axis of the limiting ring and the guide hole 811, and the limiting ring plays an auxiliary positioning role in the insertion depth of the interface of the pump head 2, ensuring that the top end of the hose 3 can be accurately aligned with the internal passage of the interface of the pump head 2 during subsequent insertion, thereby realizing accurate coaxial positioning of the pump head 2 and the hose 3 during the assembly stage.

[0057] Referring to Figs. 1, 2 and 3, the coaxial alignment assembly 8 comprises a guide bushing 81 and a coaxial alignment assembly 8. Figures 4-9 Figure 11 Figure 12 As shown in Figs. 1, 2 and 3, the edge of the guide hole 811 at the upper end of the guide bushing 81 has an inner tapered surface for guiding the interface of the pump head 2 into the guide hole 811.

[0058] ​​​When the lifting slide 6 moves upward, the guide bush 81 approaches the pump head 2 interface, the outer edge of the pump head 2 interface first contacts the inner tapered surface of the edge of the upper end guide hole 811 of the guide bush 81, which forms a gradually narrowing guide entrance, which can effectively capture and receive the slightly deviated pump head 2 interface.

[0059] During the contact process, the inclined surface of the inner tapered surface applies a radial guiding force to the pump head 2 interface, guiding it to smoothly slide into the inside of the guide hole 811, thereby compensating for the slight centering error during assembly, ensuring that the pump head 2 interface can be smoothly and accurately inserted into the guide hole 811, and achieving stable and reliable coaxial alignment.

[0060] Referring to Figures 4-9 , Figure 11 and Figure 12 , the inner side of the upper end of each limiting block 82 is provided with a slope surface, when the upper end of the hose 3 is inserted into the pump head 2 interface and continues to rise, all limiting blocks 82 are in a synchronous outward moving state under the pressing of the slope surface of the pump head 2 interface, so that the hose 3 can continue to extend into the pump head 2 interface until the pump head 2 interface contacts the lifting slide 6.

[0061] When the upper end of the hose 3 is inserted into the pump head 2 interface and continues to rise with the lifting slide 6, the pump head 2 interface contacts the slope surface on the inner side of the upper end of each limiting block 82, and under the action of the continuous upward thrust, the force exerted by the slope surface on the pump head 2 interface is decomposed into the radial component of the limiting block 82, which pushes each limiting block 82 to move outward along the radial direction of the guide bush 81, thereby expanding the inner diameter of the limiting ring formed by the limiting blocks 82, providing space for the pump head 2 interface to enter the guide hole 811 and the insertion of the hose 3.

[0062] During the upward insertion of the hose 3, the hose 3 always maintains a coaxial state with the pump head 2 under the limiting of the limiting block 82, until the pump head 2 interface passively pushes out the limiting block 82, the hose 3 has been inserted into the pump head 2 interface and continues to extend into the inside of the pump head 2 interface, until the pump head 2 interface completely passes through the limiting block 82 and finally contacts the top surface of the lifting slide 6, achieving assembly in place.

[0063] Referring to Figures 4-12 , a fixed plate 812 is fixedly arranged around the guide bush 81, and a compression spring 8121 is arranged between each limiting block 82 and the corresponding fixed plate 812, when the limiting block 82 moves outward, the compression spring 8121 is in a compressed state.

[0064] When the lifting slide 6 drives the hose 3 to move upward, the hose 3 moves upward under the pushing of the lifting slide 6, and the top end of the hose 3 is inserted into the interface of the static pump head 2. As the lifting slide 6 further rises, the outer wall of the pump head 2 interface contacts the inclined surface on the inner side of the upper end of each limiting block 82, the interface applies an outward force to the inclined surface, pushes the limiting block 82 to overcome the elastic force of the compression spring 8121, and moves radially and synchronously outward along the guide bushing 81. At this time, the compression spring 8121 is compressed.

[0065] While the limiting block 82 moves outward to make room, the hose 3 continues to penetrate the pump head 2 interface, and the insertion process is completed. The limiting block 82 always tends to reset inward under the pre-tightening action of the compression spring 8121, and forms a stable circumferential constraint on the outer wall of the pump head 2 interface, ensuring that the hose 3 and the pump head 2 always maintain a coaxial state during the rising insertion process, until the pump head 2 interface completely passes through the limiting block 82, and the hose 3 reaches the preset insertion depth and is assembled in place.

[0066] Referring to Figures 6-10 As shown, the guide bushing 81 is provided with a sliding groove 813 around the periphery for the corresponding limiting block 82 to slide radially along the guide hole 811. The portion of each limiting block 82 inserted into the guide hole 811 is a trapezoidal end 821, and the portion of each sliding groove 813 connected with the guide hole 811 has a trapezoidal notch adapted to the corresponding trapezoidal end 821 to block the limiting block 82 from pressing the hose 3.

[0067] When the hose 3 rises with the lifting slide 6 and is inserted into the pump head 2 interface, the outer wall of the pump head 2 interface pushes each limiting block 82 to move radially outward along the sliding groove 813 on the guide bushing 81. At this time, the trapezoidal end 821 of the limiting block 82 slides in the sliding groove 813, and the trapezoidal notch at the joint of the trapezoidal end 821 and the sliding groove 813 cooperates with each other to form a limiting structure.

[0068] The inclined surface of the trapezoidal notch and the inclined surface of the trapezoidal end 821 of the limiting block 82 fit together, which can effectively block the limiting block 82 from moving inward excessively under the elastic force of the compression spring 8121, prevent the inner end of the limiting block 82 from protruding into the guide hole 811 to press the hose 3, thereby avoiding the hose 3 from being squeezed and deformed, ensuring that the hose 3 is smoothly inserted into the pump head 2 interface, and maintaining the coaxial centering state of the pump head 2 interface and the hose 3.

[0069] Referring to Figures 6-12 As shown, each fixed plate 812 is provided with a pressure sensor 8122, and the two ends of each compression spring 8121 are fixedly connected with the corresponding pressure sensor 8122 and the limiting block 82, respectively. The axis direction of the compression spring 8121 is parallel to the moving direction of the limiting block 82, and each pressure sensor 8122 is electrically connected with the pipe clamp 4.

[0070] When one of the pressure sensors 8122 senses an abnormal pressure, it indicates that the part of the hose 3 to be inserted into the interface of the pump head 2 is in a bent state, at which time the pipe clamp 4 immediately releases the hose 3.

[0071] When all the limiting blocks 82 limit the hose 3, the compression spring 8121 provides a pre-tightening force to keep the trapezoidal end 821 of the limiting block 82 in contact with the trapezoidal notch, ensuring that the hose 3 is stably limited without being forced. During assembly, if the hose 3 is misaligned with the interface of the pump head 2 or there is insertion resistance, causing the hose 3 to be locally bent, it will cause the pressure on one side of the limiting block 82 to abnormally increase. This pressure change is monitored in real time by the corresponding pressure sensor 8122 and transmitted to the control system.

[0072] Once any pressure sensor 8122 detects a pressure different from that of the remaining pressure sensors 8122, it is determined that the hose 3 is in a bent state, and the control system immediately instructs the pipe clamp 4 to release the hose 3, stopping the forced assembly. This effectively prevents deformation, damage, or assembly failure of the hose 3 caused by forced insertion, realizes intelligent monitoring and active protection of the assembly process, and improves product yield.

[0073] Referring to Figures 6-12 As shown in the drawings, the upper outer side of each limiting block 82 is fixedly provided with a movable electromagnet 822, and the upper periphery of the guide bushing 81 is fixedly provided with a fixed electromagnet 823. When the hose 3 is inserted into the guide hole 811 from bottom to top, the fixed electromagnet 823 and the movable electromagnet 822 are in an energized state of mutual repulsion, causing the limiting ring to automatically open to allow the hose 3 to enter.

[0074] When the hose 3 is inserted into the guide hole 811 from bottom to top, the fixed electromagnet 823 on the upper periphery of the guide bushing 81 and the corresponding movable electromagnet 822 on the upper outer side of each limiting block 82 are simultaneously energized, generating a repulsive electromagnetic force between them. This repulsive force acts on the limiting block 82, pushing each limiting block 82 to move outward along the radial direction of the guide bushing 81, overcoming the pre-tightening force of the compression spring 8121, causing the limiting ring composed of all the limiting blocks 82 to automatically open, expanding the entrance, thereby providing sufficient space for the hose 3 to smoothly enter, ensuring that the hose 3 can smoothly enter the inside of the guide hole 811 before being inserted into the interface of the pump head 2, and avoiding deformation of the hose 3 at the upper end due to pressing against the limiting block 82.

[0075] Until the hose 3 enters between all the limiting blocks 82, the fixed electromagnet 823 and the movable electromagnet 822 are de-energized, thereby limiting the hose 3 and maintaining the coaxial state with the pump head 2.

[0076] Referring to Figures 1-5As shown, a pair of said pipe clamp 4, cutting tool 5 and coaxial alignment assembly 8 are symmetrically arranged on the lifting slide 6, forming double stations.

[0077] The fixed ring 12 has two discharge ports.

[0078] The rotating disc 1 rotates once, and two pump heads 2 enter the double stations at the same time, and two pump heads 2 come to the two discharge ports.

[0079] When the rotating disc 1 rotates once, the clamping groove 11 on the edge drives the two pump heads 2 to move synchronously to the assembly station, and at this time, the symmetrically arranged pair of coaxial alignment assemblies 8, pipe clamps 4 and cutting tools 5 in the double stations of the assembly mechanism correspond to the interface positions of the two pump heads 2 respectively.

[0080] With the upward movement of the lifting slide 6, the guide bushings 81 in the two sets of coaxial alignment assemblies 8 are respectively inserted into the interfaces of the two pump heads 2, realizing the coaxial alignment of the respective hoses 3 with the pump heads 2, and at the same time, the two sets of pipe clamps 4 clamp the corresponding hoses 3 and synchronously perform the insertion and cutting actions, completing the parallel assembly of the two pump heads 2.

[0081] After assembly is completed, the rotating disc 1 continues to rotate, synchronously conveying the two assembled pump heads 2 to the two discharge port positions arranged on the fixed ring 12, so that the discharge mechanism simultaneously discharges in the double stations, thereby realizing the double-station synchronous feeding, assembly and discharging of the pump heads 2 and improving the production efficiency.

[0082] A length-adjustable self-cutting pump head pipe assembly method applied to the length-adjustable self-cutting pump head pipe assembly device described above, comprising the following steps:

[0083] S1, start the rotating disc 1 to send the pump head 2 to the assembly station;

[0084] S2, start the pipe clamp 4 to clamp the hose 3, and at the same time, the hose 3 is limited between the limiting blocks 82;

[0085] S3, the lifting slide 6 rises, the pump head 2 interface is first inserted into the guide hole 811, then pushes away the limiting block 82, until it contacts with the lifting slide 6, and the hose 3 is inserted in place.

[0086] The inner tapered surface of the guide hole 811 of the guide bushing 81 guides the pump head 2 interface to smoothly enter, automatically corrects the deviation in the initial butt joint stage of the pump head 2 interface, effectively absorbs the slight axial deviation caused by positioning or conveying in the assembly process, significantly reduces the insertion resistance, and improves the centering efficiency. And the limiting ring formed by the limiting block 82 uniformly constrains the outer wall of the hose 3 in the radial direction, ensuring that the hose 3 always maintains the coaxial state with the pump head 2 interface throughout the insertion process, preventing misalignment caused by shaking or unbalanced load.

[0087] The pressure sensor 8122 arranged between each limiting block 82 and the fixed plate 812 is used to monitor the contact pressure in each direction in real time and independently. When the hose 3 is locally bent due to misalignment or external interference, the pressure on one side will abnormally increase, and the control signal will be triggered to release the hose 3 from the pipe clamp 4, interrupt the rising action, and avoid the damage of the interface or the deformation of the hose 3 caused by hard pushing. The whole process realizes the closed-loop control from the guidance centering, dynamic limiting to intelligent protection, improves the success rate of single insertion, and guarantees the stability and consistency of the large-scale automatic assembly.

[0088] The above embodiments only express one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A length-adjustable self-cutting pump head pipe assembly device, comprising a rotating disc, the rotating disc is provided with a feeding mechanism, an assembling mechanism and a discharging mechanism on the side thereof, and a plurality of clamping grooves for positioning the pump head are uniformly distributed along the circumferential direction of the edge of the rotating disc; characterized in that, The assembly mechanism comprises a pipe clamp, a cutting tool, a lifting slide and a guide rail; the pipe clamp and the cutting tool are sequentially arranged on the lifting slide from bottom to top; the lifting slide is arranged below the rotary disc and can move on the guide rail perpendicular to the surface of the rotary disc; the lifting slide is provided with a through hole through which the hose passes from bottom to top along the moving direction of the lifting slide; the assembly mechanism further comprises a coaxial alignment assembly for keeping the pump head coaxial with the hose, and the coaxial alignment assembly comprises a guide bushing; the guide bushing is fixedly arranged on the top of the lifting slide, and the guide bushing is provided with a guide hole which can be inserted into the pump head interface and is communicated with the through hole; the guide hole is coaxial with the through hole, and the diameter of the guide hole is larger than that of the through hole; when the guide bushing rises and the pump head interface is inserted into the guide hole, the pump head interface is in a coaxial limiting state relative to the hose; the guide rail and the lifting slide are respectively provided with a displacement transmitter and a displacement receiver which cooperate with each other to form a non-contact displacement detection system; the coaxial alignment assembly further comprises a limiting block, and the guide bushing is provided with one limiting block around; each limiting block can move radially along the guide bushing, and all the limiting blocks together form a limiting ring for positioning the part of the hose to be inserted into the pump head interface in the guide hole; the limiting ring is coaxial with the guide hole; the edge of the guide hole at the upper end of the guide bushing has an inner tapered surface for guiding the pump head interface into the guide hole; the inner side of the upper end of each limiting block is provided with an inclined surface; when the upper end of the hose is inserted into the pump head interface and continues to rise, all the limiting blocks are in a synchronous outward moving state under the pressing of the pump head interface along the inclined surface, so that the hose can continue to penetrate into the pump head interface until the pump head interface contacts the lifting slide; one fixed plate is fixedly arranged around the guide bushing; a compression spring is arranged between each limiting block and the corresponding fixed plate; when the limiting block moves outward, the compression spring is in a compressed state; a pressure sensor is arranged on each fixed plate; the two ends of each compression spring are respectively fixedly connected with the corresponding pressure sensor and the limiting block; the axis direction of the compression spring is parallel to the moving direction of the limiting block; and each pressure sensor is electrically connected with the pipe clamp.

2. An adjustable length self-severing pump head tube fitting assembly according to claim 1, wherein, A sliding groove is arranged around the guide bushing for the corresponding limiting block to slide radially in the guide hole; the part of each limiting block inserted into the guide hole is a trapezoidal end; and each sliding groove has a trapezoidal notch which is adapted to the corresponding trapezoidal end to prevent the limiting block from pressing the hose.

3. An adjustable length self-severing pump head tubing fitting assembly according to claim 1 wherein, An active electromagnet is fixedly arranged on the outer side of the upper end of each limiting block; and a fixed electromagnet is fixedly arranged around the upper end of the guide bushing; when the hose is inserted into the guide hole from bottom to top, the fixed electromagnet and the active electromagnet are in an electrified mutual repulsion state, so that the limiting ring is automatically opened for the hose to enter.

4. An adjustable length self-severing pump hose assembly apparatus as defined in claim 1 wherein, A pair of the pipe clamp, the cutting tool and the coaxial alignment assembly are symmetrically arranged on the lifting slide to form a double-station.

5. A method for assembling a length-adjustable self-cutting pump head pipe fitting, applied to the length-adjustable self-cutting pump head pipe fitting assembly device of any one of claims 1-4, characterized in that, The method comprises the following steps: S1, starting the rotary disc to send the pump head to the assembly station; S2, starting the pipe clamp to clamp the hose, and the hose is limited between the limiting blocks at the same time; S3, the lifting slide rises, the pump head interface is first inserted into the guide hole, then the limiting blocks are pushed away, until the lifting slide is contacted, and the hose is inserted in place.

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