Pressing pump head assembling machine based on automatic calibration and automatic calibration method

Abstract

The invention relates to the technical field of pressing pump assembling, in particular to a pressing pump head assembling machine based on automatic calibration and an automatic calibration method.The pressing pump head assembling machine comprises a rotating disc, a positioning jig, a positioning head and a positioning and rotating composite mechanism, the positioning jig is arranged on the rotating disc, so that a pump shell inserted into the positioning jig can sequentially pass through assembling stations, and the assembling efficiency is improved; in the assembling link, the positioning and rotating composite mechanism can drive the positioning head to accurately abut against and position the pump shell and then drive the pump shell to rotate, so that smooth insertion of parts is achieved, and the problem that in a traditional assembling mode, the pump shell is slightly deformed due to long-time rigid fixing of a clamp is solved; and meanwhile, the mode of rotary insertion after positioning is adopted, stress distortion in the pump shell fixing process is avoided, fine adjustment and centering of parts in the insertion process are achieved through dynamic guide of rotation, and the overall assembly smoothness, coaxial precision and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of press pump assembly, and in particular to an automatic calibration-based press pump head assembly machine and an automatic calibration method. Background Art

[0002] A pump head is a liquid dispensing device widely used in the daily chemical, pharmaceutical, food, and fine chemical industries. It boasts a simple structure, easy operation, and low manufacturing cost. Its core operating principle is based on the reciprocating motion of a piston: when the user presses the pump head, the piston moves downward, expelling air from the pump chamber, creating an internal negative pressure. Subsequently, the spring forces the piston back into place, and external air pressure pushes liquid through the inlet valve into the pump body and ultimately out through the outlet pipe. The entire process relies on air pressure differentials to drive liquid flow and achieve quantitative delivery.

[0003] The internal structure of a pump head generally consists of an inlet valve, an exhaust valve, a spring, a piston, and a pump housing. These components are highly coordinated in terms of spatial structure, and the precision of their assembly directly determines the pump head's sealing performance, fluid flow, and overall service life. Any dimensional deviation or positional shift during assembly can easily lead to quality issues such as leakage, sticking, and poor rebound.

[0004] In actual production, the assembly of pump heads relies primarily on manual labor or semi-automated equipment, and alignment accuracy is crucial to the entire assembly process. A clamp is typically used to secure the pump housing, and internal components are then inserted sequentially. However, this process carries significant structural risks. When the pump housing is continuously clamped and held in place, its thin-walled structure is susceptible to minor deformation due to prolonged clamping or uneven force, which can affect the shape of the internal space. This deformation can make it difficult to properly align components such as the piston, preventing smooth insertion or resulting in off-center assembly.

[0005] If the coaxiality is imbalanced, the seal ring and sealing surface may not fully align, causing fluid leakage. Furthermore, structural offset can cause abnormal friction between the piston and the inner wall of the pump housing during its vertical movement, leading to press jams or rebound lag, seriously affecting product performance and user experience. Components may also be damaged due to interference during forced assembly, reducing the overall assembly yield. Summary of the Invention

[0006] In response to the problems existing in the prior art, a press pump head assembly machine and an automatic calibration method based on automatic calibration are provided. By arranging a positioning jig on the rotating disk, the pump casing inserted into the positioning jig can pass through the assembly station in sequence. In the assembly process, the positioning and rotating composite mechanism can drive the positioning head to accurately abut and position the pump casing, and then drive the pump casing to rotate, thereby realizing the smooth insertion of parts, solving the problem that in the traditional assembly method, the pump casing is slightly deformed due to being rigidly fixed by the clamp for a long time, which leads to increased local stress due to static press-fitting. By adopting the method of rotating and plugging after positioning, not only the force distortion during the fixing process of the pump casing is avoided, but also the parts can be fine-tuned and aligned during the insertion process through dynamic rotation guidance, thereby improving the smoothness, coaxial accuracy and reliability of the overall assembly.

[0007] In order to solve the problems of the existing technology, the present invention provides a pressing pump head assembly machine based on automatic calibration, including a rotating disk and several assembly stations and a blanking station arranged in sequence along the rotation direction of the rotating disk, each assembly station and blanking station is provided with an assembly robot, and the rotating disk is provided with a positioning jig distributed along its circumference; the positioning jig includes a positioning channel for vertical insertion of the pump casing, and the annular flange at the top of the pump casing abuts the top of the positioning channel; the positioning channel is provided with a positioning head distributed along its circumference, and the positioning head can move radially along the positioning channel and abut against the surface of the pump casing; the positioning jig is also provided with a positioning rotation composite mechanism connected to the positioning head in transmission, and the positioning rotation composite mechanism is used to drive the positioning head to abut against the surface of the pump casing and drive the pump casing to rotate during plug-in assembly.

[0008] Preferably, the positioning and rotation composite mechanism includes a damping ring, which is rotatably arranged in the positioning jig and coaxial with the positioning channel, and the damping ring needs to overcome a resistance threshold when rotating; a driving block, which is circumferentially distributed at the bottom end of the damping ring, and the driving block slides with the damping ring along the radial direction of the damping ring, and the positioning head is connected to the driving block; the driving ring, which is rotatably arranged in the positioning jig and coaxial with the damping ring, and the driving block slides with the driving ring along a direction deviating from the radial direction of the driving ring; a linear-rotational motion converter, which is arranged in the positioning jig and is transmission-connected to the driving ring, and when the assembly robot vertically plugs in the pump valve pipe, its movement is converted into the rotational motion of the driving ring.

[0009] Preferably, a connecting rod is provided at one end of the positioning head facing the driving block; the connecting rod slides through the driving block and is provided with a limiting ring; an elastic buffer element is sleeved on the connecting rod, and the elastic buffer element is located between the positioning head and the driving block.

[0010] Preferably, the drive ring is provided with drive grooves distributed along its circumference, and the drive grooves extend in a direction deviating from the radial direction of the drive ring; the bottom end of the drive block is provided with a drive pin extending downward, and the drive pin is slidably engaged with the drive grooves.

[0011] Preferably, the bottom end of the damping ring is provided with guide grooves distributed along its circumference, and the guide grooves extend along the radial direction of the damping ring; the top end of the driving block is in sliding engagement with the guide grooves.

[0012] Preferably, a stepped groove is provided at the top of the inner cavity of the positioning fixture, and an inner connecting tube extending upward is provided on the inner periphery of the damping ring, and the inner connecting tube is rotatably connected to the stepped groove; a torsion spring is also provided between the inner connecting tube and the stepped groove, and the two ends of the torsion spring are respectively fixedly connected to the stepped groove and the inner connecting tube.

[0013] Preferably, the linear-rotary motion converter includes an outer connecting tube, which is rotatably arranged in a positioning jig and coaxial with the driving ring, the inner periphery of the outer connecting tube is fixedly connected to the driving ring, and the outer axis of the outer connecting tube is provided with arc grooves distributed along its circumference; a sliding member, which is slidably arranged in the positioning jig in the longitudinal direction, and a guide pin is provided at the bottom end of the sliding member, which slides in cooperation with the arc groove and abuts against the top end of the sliding member when the assembly robot assembles downward; an elastic reset element, which is provided on the sliding member for resetting the sliding member.

[0014] Preferably, the sliding member includes a sliding rod, which is distributed circumferentially on the positioning jig and slides vertically through the positioning jig; an upper connecting ring, which is arranged at the top end of the sliding rod and is coaxial with the positioning jig, and an elastic reset element is arranged between the upper connecting ring and the positioning jig; a lower connecting ring, which is arranged at the bottom end of the sliding rod and is coaxial with the positioning jig, and a guide pin is radially arranged in the lower connecting ring.

[0015] Preferably, an abutment frame is provided on the outer side of the clamping portion of the assembly robot, and the abutment frame abuts against the top end of the upper connecting ring during assembly of the assembly robot.

[0016] An automatic calibration method for assembling a press pump head based on automatic calibration, using an automatic calibration press pump head assembly machine, comprising the following steps: Step 1: Insert the pump casing vertically into the positioning channel, with the annular flange abutting the top of the channel and the positioning head remaining in its initial position; Step 2: The rotating disk drives the pump casing to the assembly station; Step 3: The assembly robot grabs the parts for plug-in assembly. At the same time, the positioning and rotating composite mechanism is activated, driving the positioning head to move radially against the pump casing for positioning, and driving the pump casing to dock and calibrate with the parts in a rotating state; Step 4: The current station assembly is completed, the assembly manipulator and positioning head are reset, and the composite mechanism stops; the rotating disk moves the pump casing to the next station, and step 3 is repeated; Step 5: The finished pump head is transferred to the unloading station, where the assembly robot picks up the parts and unloads them; the rotating disc receives the new pump casing, and the entire process is repeated.

[0017] Compared to the prior art, the present invention has the following advantages: By providing a positioning jig on a rotating disk, the pump casing is inserted into the positioning jig's positioning channel and sequentially passes through each assembly station along the rotating disk. During assembly, the positioning and rotation composite mechanism first precisely positions the pump casing with a positioning head, then drives the pump casing to rotate, thereby enabling smooth insertion of components. This effectively solves the problem in traditional assembly methods where the pump casing undergoes slight deformation due to long-term rigid fixation by the clamp, which in turn increases local stress during static press-fitting. Due to slight deformation of the pump casing, its inner cavity may no longer be in an ideal state, making it difficult for the plugged components to maintain coaxiality, leading to jamming, scratching, and even plug-in failure. By providing a damping disk and a torsion spring, when the force exerted by the drive ring on the drive block is greater than the torsion of the torsion spring, the damping disk can rotate relative to the positioning jig. This allows the positioning head to coaxially position the pump casing and then drive the pump casing to rotate, allowing the pump casing to be press-fitted into the components while rotating. The method of positioning first and then rotating and plugging in not only avoids stress distortion during the pump casing fixation process, but also enables fine-tuning of components during insertion through dynamic rotation guidance, thereby improving the smoothness, coaxial accuracy and reliability of the overall assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a press pump head assembly machine based on automatic calibration of the present invention; Figure 2 This is a three-dimensional diagram of an assembly robot and a positioning fixture in a press pump head assembly machine based on automatic calibration according to the present invention; Figure 3 It is a cross-sectional view of a positioning jig in a press pump head assembly machine based on automatic calibration according to the present invention; Figure 4 yes Figure 3 A local enlarged view of point A; Figure 5 yes Figure 3 A partial enlarged view of point B; Figure 6 This is a three-dimensional exploded view of a positioning jig in a press pump head assembly machine based on automatic calibration according to the present invention; Figure 7 yes Figure 6 A partial enlarged view of point C; Figure 8 This is a three-dimensional exploded view of a positioning and rotating composite mechanism in a press pump head assembly machine based on automatic calibration according to the present invention; Figure 9 yes Figure 8 A partial enlarged view of point D; Figure 10 This is an exploded view of the pump head.

[0019] The numbers in the figure are: 1. rotating disk; 2. assembly robot; 21. abutment frame; 3. positioning fixture; 31. positioning channel; 32. positioning head; 321. connecting rod; 322. limiting ring; 323. elastic buffer element; 33. stepped groove; 4. positioning and rotating composite mechanism; 41. damping ring; 411. guide groove; 412. inner connecting tube; 42. driving block; 421. driving pin; 43. driving ring; 431. driving groove; 441. outer connecting tube; 4411. arc groove; 4421. sliding rod; 4422. upper connecting ring; 4423. lower connecting ring; 443. elastic reset element; 444. guide pin; 45. torsion spring. DETAILED DESCRIPTION

[0020] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1-Figure 3 、 Figure 10 As shown, a pressing pump head assembly machine based on automatic calibration includes a rotating disk 1 and several assembly stations and a blanking station arranged in sequence along the rotation direction of the rotating disk 1. Each assembly station and blanking station is provided with an assembly robot 2. The rotating disk 1 is provided with a positioning jig 3 distributed along its circumference; the positioning jig 3 includes a positioning channel 31 for vertical insertion of the pump casing, and the annular flange at the top of the pump casing abuts the top of the positioning channel 31; the positioning channel 31 is provided with a positioning head 32 distributed along its circumference, and the positioning head 32 can move radially along the positioning channel 31 and abut against the surface of the pump casing; the positioning jig 3 is also provided with a positioning rotation composite mechanism 4 that is transmission-connected to the positioning head 32, and the positioning rotation composite mechanism 4 is used to drive the positioning head 32 to abut against the surface of the pump casing and drive the pump casing to rotate during plug-in assembly.

[0022] The diameter of the positioning channel 31 is larger than the diameter of the pump casing, and a positioning block with an inner diameter slightly larger than the diameter of the pump casing is inserted at the top of the positioning channel 31 to prevent the pump casing from shaking too much in the positioning channel. At the same time, positioning blocks with different inner diameters can be replaced to facilitate the insertion of pump casings of different diameters and improve assembly adaptability.

[0023] The pump head assembly machine consists of a rotating disk 1 equipped with several positioning fixtures 3, as well as multiple assembly stations and a blanking station arranged in sequence along the rotating disk 1. Each assembly station and blanking station is equipped with an automated assembly robot 2 to complete the component insertion and handling operations in each process.

[0024] The rotating disk 1 is equipped with positioning jigs 3 arranged at equal intervals along its circumference, which are used to achieve rapid positioning and dynamic calibration during the pump casing assembly process. Each positioning jig 3 has a vertical insertion-type positioning channel 31 for accommodating the pump casing. Once the pump casing is inserted into the positioning channel 31, its annular flange at the top abuts against the upper edge of the positioning channel 31, achieving initial vertical positioning and limiting support.

[0025] Several radially movable positioning heads 32 are provided along the circumference of the positioning channel 31. The positioning heads 32 can move inward under the control of the positioning and rotating composite mechanism 4, closely contacting and clamping the outer surface of the pump casing, completing the circumferential limit and posture calibration operations of the pump casing.

[0026] In order to achieve dynamic coordination during the plug-in process, the positioning and rotating composite mechanism 4 can drive the pump casing to perform precisely controlled rotational motion around its central axis after completing the positioning of the pump casing through the positioning head 32, thereby cooperating with the insertion action of other components in the assembly station to achieve dynamic optimization of the plug-in accuracy.

[0027] This structural design solves the problem of localized structural deformation and increased assembly difficulty caused by the rigid clamping of the pump housing during traditional pump head assembly. Especially when the pump housing has molding errors or slight deformations, the positioning and rotation composite mechanism 4 can leverage the rotatable nature of the pump housing to achieve adaptive alignment during the insertion process, effectively improving coaxiality and avoiding jamming, scratching, or assembly failure caused by eccentricity, significantly enhancing assembly consistency, reliability, and automation.

[0028] like Figure 4-Figure 9 As shown, the positioning and rotation composite mechanism 4 includes a damping ring 41, which is rotatably arranged in the positioning jig 3 and coaxial with the positioning channel 31. The damping ring 41 needs to overcome a resistance threshold when rotating; a driving block 42, which is circumferentially distributed at the bottom end of the damping ring 41, and the driving block 42 slides with the damping ring 41 along the radial direction of the damping ring 41, and the positioning head 32 is connected to the driving block 42; a driving ring 43, which is rotatably arranged in the positioning jig 3 and coaxial with the damping ring 41, and the driving block 42 slides with the driving ring 43 along a direction deviating from the radial direction of the driving ring 43; a linear-rotational motion converter, which is arranged in the positioning jig 3 and is transmission-connected to the driving ring 43. When the pump valve pipe is vertically plugged in by the assembling robot 2, its movement is converted into the rotational motion of the driving ring 43.

[0029] When the linear-rotary motion converter drives the drive ring 43 to rotate relative to the damping ring 41, the non-radial sliding fit structure between the drive ring 43 and the multiple drive blocks 42 causes the drive blocks 42 to move radially inward along the damping ring 41, thereby driving the positioning head 32 connected to it to abut the outer wall of the pump casing inward, thereby achieving circumferential clamping and precise positioning of the pump casing.

[0030] As the drive ring 43 continues to rotate, and the torque it exerts on the drive block 42 exceeds the resistance threshold set by the damping ring 41, the drive block 42 will drive the damping ring 41 to rotate together, causing the damping ring 41, drive ring 43, and drive block 42 to rotate synchronously. At this point, the pump housing, which has been clamped by the positioning head 32, is driven by the entire composite mechanism to rotate, completing the dynamic rotation guide assembly process of the pump housing.

[0031] The damping ring 41 is rotatably mounted in the positioning fixture 3 and is coaxially arranged with the positioning channel 31. The damping ring 41 needs to overcome a set resistance threshold when rotating to provide rotation stability and prevent malfunction.

[0032] The drive blocks 42 are distributed circumferentially along the bottom of the damping ring 41 and radially form a sliding fit with the damping ring 41. Each drive block 42 is mechanically connected to a group of positioning heads 32 to achieve radial movement and clamping control of the positioning heads 32.

[0033] The drive ring 43 is coaxially mounted in the positioning fixture 3 and is rotatable relative to the damping ring 41. A non-radial sliding fit is formed between the drive block 42 and the drive ring 43 using an inclined surface, eccentric groove, or helical tooth structure, thereby pushing the drive block 42 to achieve radial movement when the drive ring 43 rotates.

[0034] The linear-rotational motion converter is installed inside the positioning fixture 3 and forms a transmission connection with the drive ring 43. When the manipulator 2 is assembled and plugged into the pump valve pipe, the converter converts the linear motion of its vertical pressing into the rotation of the drive ring 43, realizing automatic linkage.

[0035] like Figure 4 and Figure 9 As shown, a connecting rod 321 is provided at one end of the positioning head 32 facing the driving block 42; the connecting rod 321 slides through the driving block 42 and is provided with a limiting ring 322; an elastic buffer element 323 is sleeved on the connecting rod 321, and the elastic buffer element 323 is located between the positioning head 32 and the driving block 42.

[0036] The connecting rod 321 is spline-connected to the driving block 42 to prevent the connecting rod 321 from rotating relative to the driving block 42 .

[0037] In order to further reduce the influence of the clamping force on the pump casing structure, the positioning head 32 is installed through an elastic connection so that it can give way appropriately during the clamping process and elastically fit the surface of the pump casing, effectively avoiding deformation or stress concentration of the pump casing due to rigid compression.

[0038] Driven by the drive ring 43 , the drive block 42 pushes the positioning head 32 radially inward.

[0039] When the positioning head 32 contacts the pump housing, it is elastically pressed against the pump housing by the elastic element.

[0040] Once clamping is complete, the resilient cushioning element 323 continues to provide a continuous and controlled contact force.

[0041] If the pump housing needs to be rotated for assembly later, the positioning head 32 rotates together with the pump housing, and due to the presence of elastic buffering, friction damage or sliding error during the assembly process is further reduced.

[0042] like Figure 8 As shown, the drive ring 43 is provided with drive grooves 431 distributed along its circumference, and the drive grooves 431 extend in a direction deviating from the radial direction of the drive ring 43; the bottom end of the drive block 42 is provided with a drive pin 421 extending downward, and the drive pin 421 is slidably engaged with the drive grooves 431.

[0043] The drive ring 43 is provided with a plurality of drive grooves 431, evenly distributed along the circumference of the drive ring 43. Each drive groove 431 extends away from the radial direction of the drive ring 43, that is, along the tangential direction of the drive ring 43. This design allows the drive block 42 to effectively transmit driving force through the sliding engagement with the drive grooves 431 as the drive ring 43 rotates, thereby achieving the function of driving the drive block 42 to move as the drive ring 43 rotates.

[0044] A downwardly extending drive pin 421 is provided at the bottom end of the drive block 42, which slidably engages a drive slot 431 in the drive ring 43. The function of the drive pin 421 is to transmit the rotation of the drive ring 43 to the drive block 42, allowing the drive block 42 to slide along a set trajectory and generate corresponding movement as the drive ring 43 rotates.

[0045] As the drive ring 43 rotates, its circumferentially distributed drive slots 431 guide the drive pins 421 along their sliding paths, pushing the drive block 42 along a predetermined motion trajectory. The sliding position of the drive block 42 determines the radial motion of the positioning head 32, thereby driving precise dynamic rotation and assembly of the pump housing. This structure ensures efficient and precise power transmission between the drive block 42 and the drive ring 43, thereby ensuring stable movement of the positioning head 32.

[0046] like Figure 4 As shown, the bottom end of the damping ring 41 is provided with guide grooves 411 distributed along its circumference, and the guide grooves 411 extend along the radial direction of the damping ring 41 ; the top end of the driving block 42 is in sliding engagement with the guide grooves 411 .

[0047] The damping ring 41 has a plurality of guide slots 411 evenly distributed along its circumference at its bottom end. Each guide slot 411 extends radially from the center of the damping ring 41, radiating outward from the center of the damping ring 41. This arrangement facilitates precise radial movement of the driving block 42 and prevents unnecessary circumferential or axial deviation.

[0048] The top of the driving block 42 is provided with a guiding protrusion that slides with the guide groove 411. The structure can adopt a dovetail type, T-type or rectangular cam design to form a matching restriction with the guide groove 411, so that the movement of the driving block 42 is strictly controlled by the guide and can only slide in the radial direction.

[0049] The guide structure restricts the movement direction of the drive block 42 by the damping ring 41, ensuring that the drive block 42 will not deflect, rotate or get stuck during the clamping or releasing action of the positioning head 32, further improving the stability and reliability of the assembly mechanism.

[0050] like Figure 4 As shown, a stepped groove 33 is provided at the top of the inner cavity of the positioning fixture 3, and an upwardly extending inner connecting tube 412 is provided on the inner periphery of the damping ring 41, and the inner connecting tube 412 is rotatably connected to the stepped groove 33; a torsion spring 45 is also provided between the inner connecting tube 412 and the stepped groove 33, and the two ends of the torsion spring 45 are fixedly connected to the stepped groove 33 and the inner connecting tube 412 respectively.

[0051] The stepped groove 33 is an annular concave structure and is provided on the top wall of the positioning fixture 3 along the axial direction thereof.

[0052] The connection method can adopt rolling support (ball bearing), sliding fit (bearing ring) or clearance fit, so that the damping ring 41 can achieve a limited angle of rotation around the central axis relative to the positioning fixture 3 body.

[0053] A torsion spring 45 is provided between the stepped groove 33 and the inner connecting tube 412 . The torsion spring 45 is wound along the circumferential direction and installed between the outer wall of the inner connecting tube 412 and the inner wall of the stepped groove 33 .

[0054] Two ends of the torsion spring 45 are respectively fixed to the stepped groove 33 and the inner connecting tube 412 , that is, one end is connected to the fixing hole or the limiting column on the stepped groove 33 .

[0055] The other end is fixedly connected to the torque slot or connecting ear on the inner connecting tube 412.

[0056] The torsion spring 45 provides a rotational elastic torque to form a resistance threshold of the damping ring 41. When an external force drives the damping ring 41 to rotate, the torsion spring 45 will generate a reaction torque to achieve the functions of damping recovery and buffering limit. At the same time, when the applied force is less than the annular elastic torque of the torsion spring 45, the damping ring 41 is stationary relative to the positioning fixture 3, so that the driving ring 43 can guide the driving block 42 to move radially along the damping ring 41 when rotating.

[0057] When the force exerted by the drive ring 43 on the drive block 42 is greater than the annular elastic torque of the torsion spring 45, the damping ring 41 rotates relative to the positioning fixture 3 to overcome the torsion of the torsion spring 45, thereby causing the pump casing to be rotated while being coaxially positioned by the positioning head 32, so that the components are inserted into the rotating pump casing, making the pressing force distribution more uniform and reducing the local stress concentration.

[0058] like Figure 3-Figure 6 As shown, the linear-rotational motion converter includes an outer connecting cylinder 441, which is rotatably arranged in the positioning jig 3 and is coaxial with the driving ring 43, the inner periphery of the outer connecting cylinder 441 is fixedly connected to the driving ring 43, and the outer axis of the outer connecting cylinder 441 is provided with an arc groove 441 distributed along its circumference; a sliding member is longitudinally slidably arranged in the positioning jig 3, and a guide pin 444 is provided at the bottom end of the sliding member, and the guide pin 444 is slidably matched with the arc groove 4411, and abuts against the top end of the sliding member when the assembly robot 2 is assembled downward; an elastic reset element 443 is provided on the sliding member for resetting the sliding member.

[0059] The outer connecting cylinder 441 is rotatably disposed in the positioning fixture 3 along the vertical direction, and the central axis thereof is coaxially arranged with the driving ring 43 .

[0060] The inner circumferential wall of the outer connecting cylinder 441 is fixedly connected to the driving ring 43 , so that the rotation of the outer connecting cylinder 441 can synchronize the movement of the driving ring 43 .

[0061] The outer peripheral surface of the outer connecting cylinder 441 is provided with a plurality of arcuate grooves 4411 at intervals along its circumference. Each arcuate groove 4411 extends in a spiral or involute trajectory for linkage with the sliding member.

[0062] The sliding member is vertically arranged inside the positioning fixture 3 and can slide along the longitudinal direction.

[0063] A guide pin 444 is provided at the bottom end of the sliding member. The guide pin 444 extends into the arc-shaped groove 4411 on the outer wall of the outer connecting cylinder 441 to form a sliding fit relationship.

[0064] When the sliding member is pushed downward by the assembly robot 2 , the guide pin 444 slides along the arc groove 4411 , causing the outer connecting cylinder 441 to rotate under the action of the guide rail, thereby driving the driving ring 43 to rotate.

[0065] The sliding member is provided with an elastic reset element 443, which can be a helical compression spring or a corrugated spring.

[0066] The elastic element is used to push the sliding part to automatically rise and reset after the manipulator is released, and the guide pin 444 slides in the opposite direction along the arc groove 4411 to realize the rotation or reset of the rotating part.

[0067] This structure can effectively avoid the problem of the clamp action being "stuck" or unable to reset.

[0068] like Figure 3 As shown, the sliding part includes a sliding rod 4421, which is distributed circumferentially on the positioning jig 3, and the sliding rod 4421 slides vertically through the positioning jig 3; an upper connecting ring 4422, which is arranged at the top of the sliding rod 4421 and is coaxial with the positioning jig 3, and an elastic reset element 443 is arranged between the upper connecting ring 4422 and the positioning jig 3; a lower connecting ring 4423, which is arranged at the bottom end of the sliding rod 4421 and is coaxial with the positioning jig 3, and a guide pin 444 is radially arranged in the lower connecting ring 4423.

[0069] The sliding rods 4421 are a plurality of sliding shafts evenly distributed along the circumference of the positioning fixture 3 .

[0070] Each sliding rod 4421 passes through the positioning fixture 3 in the vertical direction and can achieve axial sliding in the guide hole or the sliding hole.

[0071] The upper connecting ring 4422 is an annular connecting member, fixedly disposed on the top end of each sliding rod 4421 , and is coaxially aligned with the positioning fixture 3 as a whole.

[0072] The upper connecting ring 4422 connects the top ends of all the sliding rods 4421 in a linked manner, ensuring that the multiple sliding rods 4421 can slide down or reset synchronously under the force state, thereby avoiding the jamming or asynchronism of a single rod.

[0073] The elastic reset element 443 (such as a helical compression spring) is arranged between the upper connecting ring 4422 and the positioning fixture 3, exerting an upward elastic force on the upper connecting ring 4422 to drive the sliding rod 4421 to return to its original position.

[0074] The lower connecting ring 4423 is provided at the bottom end of each sliding rod 4421 and can be an integrated ring member or a multi-point bracket design.

[0075] The lower connecting ring 4423 is mainly used for connecting the guide pin 444 assembly. The lower surface or side wall thereof may be provided with a guide pin 444 mounting hole for slidingly fitting the guide pin 444 of each sliding rod 4421 with the arc groove 4411 of the outer connecting tube 441 .

[0076] like Figure 3As shown, an abutment frame 21 is provided on the outer side of the clamping portion of the assembly robot 2 . The abutment frame 21 abuts against the top end of the upper connecting ring 4422 during assembly of the assembly robot 2 .

[0077] The abutment frame 21 is arranged on the outside of the clamping portion of the assembly robot 2, and its lower end surface is located at the end of the assembly movement direction.

[0078] During the assembly operation, when the gripping portion of the manipulator is pressed downward in the vertical direction, the lower end surface of the abutment frame 21 first directly abuts against the top surface of the upper connecting ring 4422 of the sliding member.

[0079] The structural dimensions of the abutment frame 21 match those of the upper connecting ring 4422 , and can be in planar contact.

[0080] When the assembly robot 2 is working, the axial thrust is stably applied to the upper connecting ring 4422, thereby driving the entire sliding rod 4421 assembly to move downward synchronously; at the same time, the abutment frame 21 prevents the robot from directly contacting the sliding structure body, reducing the risk of wear and unbalanced load, and extending the life of the mechanism.

[0081] An automatic calibration method for assembling a press pump head based on automatic calibration, using an automatic calibration press pump head assembly machine, comprising the following steps: Step 1: Insert the pump casing vertically into the positioning channel 31, with the annular flange abutting the top of the channel and the positioning head 32 remaining in its initial state; Step 2: Rotate the disc 1 to move the pump casing to the assembly station; Step 3: The assembly robot 2 grabs the parts for plug-in assembly. At the same time, the positioning and rotating composite mechanism 4 is activated, driving the positioning head 32 to move radially against the pump housing for positioning, and driving the pump housing to dock and align with the parts in a rotating state. Step 4: The current station assembly is completed, the assembly robot 2 and the positioning head 32 are reset, and the composite mechanism stops; the rotating disk 1 moves the pump casing to the next station, and step 3 is repeated; Step 5: The finished pump head is transferred to the unloading station, and the assembly robot 2 takes the part and unloads it; the rotating disk 1 receives the new pump casing, and the whole process is executed in a cycle.

[0082] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, and such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the appended claims.

Claims

1. A pump head assembly machine based on automatic calibration, comprising a rotating disk and a plurality of assembly stations and a blanking station arranged in sequence along the rotating direction of the rotating disk, each assembly station and blanking station is provided with an assembly robot, characterized in that: The rotating disk is provided with positioning jigs distributed along its circumference; the positioning jig includes a positioning channel for vertical insertion of the pump casing, and the annular flange at the top of the pump casing abuts against the top of the positioning channel; the positioning channel is provided with positioning heads distributed along its circumference, and the positioning heads can move radially along the positioning channel and abut against the surface of the pump casing; the positioning jig is also provided with a positioning and rotating composite mechanism connected to the positioning head in a transmission manner, and the positioning and rotating composite mechanism is used to drive the positioning head to abut against the surface of the pump casing and drive the pump casing to rotate during plug-in assembly.

2. The automatic calibration-based press pump head assembly machine according to claim 1, characterized in that: The positioning and rotation composite mechanism includes: a damping ring, which is rotatably arranged in the positioning jig and coaxial with the positioning channel, and the damping ring needs to overcome a resistance threshold when rotating; a driving block, which is circumferentially distributed at the bottom end of the damping ring, and the driving block slides with the damping ring along the radial direction of the damping ring, and the positioning head is connected to the driving block; the driving ring, which is rotatably arranged in the positioning jig and coaxial with the damping ring, and the driving block slides with the driving ring along a direction deviating from the radial direction of the driving ring; a linear-rotational motion converter, which is arranged in the positioning jig and is transmission-connected to the driving ring, and when the assembly robot vertically plugs in the pump valve pipe, its movement is converted into the rotational motion of the driving ring.

3. The automatic calibration-based press pump head assembly machine according to claim 2, characterized in that: A connecting rod is provided at one end of the positioning head facing the driving block; the connecting rod slides through the driving block and is provided with a limit ring; an elastic buffer element is sleeved on the connecting rod and is located between the positioning head and the driving block.

4. The automatic calibration-based press pump head assembly machine according to claim 2, characterized in that: The drive ring is provided with drive grooves distributed along its circumference, and the drive grooves extend in a direction deviating from the radial direction of the drive ring; the bottom end of the drive block is provided with a drive pin extending downward, and the drive pin is slidably engaged with the drive grooves.

5. The automatic calibration-based press pump head assembly machine according to claim 2, characterized in that: The bottom end of the damping ring is provided with guide grooves distributed along its circumference, and the guide grooves extend along the radial direction of the damping ring; the top end of the driving block is in sliding fit with the guide grooves.

6. The automatic calibration-based press pump head assembly machine according to claim 2, characterized in that: A stepped groove is provided at the top of the inner cavity of the positioning fixture, and an upwardly extending inner connecting tube is provided on the inner periphery of the damping ring, which is rotatably connected to the stepped groove; a torsion spring is also provided between the inner connecting tube and the stepped groove, and the two ends of the torsion spring are respectively fixedly connected to the stepped groove and the inner connecting tube.

7. The automatic calibration-based press pump head assembly machine according to any one of claims 2 to 6, characterized in that: The linear-rotary motion converter includes: an outer connecting tube, which is rotatably arranged in a positioning jig and coaxial with a driving ring, the inner periphery of the outer connecting tube is fixedly connected to the driving ring, and the outer axis of the outer connecting tube is provided with arc grooves distributed along its circumference; a sliding member, which is slidably arranged in the positioning jig in the longitudinal direction, and a guide pin is provided at the bottom end of the sliding member, which slides in cooperation with the arc groove and abuts against the top end of the sliding member when the assembly robot is assembled downward; an elastic reset element, which is provided on the sliding member for resetting the sliding member.

8. The automatic calibration based press pump head assembly machine according to claim 7, characterized in that the sliding part include : A sliding rod is distributed circumferentially on the positioning jig, and the sliding rod slides vertically through the positioning jig; an upper connecting ring is arranged at the top end of the sliding rod and is coaxial with the positioning jig, and an elastic reset element is arranged between the upper connecting ring and the positioning jig; a lower connecting ring is arranged at the bottom end of the sliding rod and is coaxial with the positioning jig, and a guide pin is radially arranged in the lower connecting ring.

9. The automatic calibration-based press pump head assembly machine according to claim 8, characterized in that: An abutment frame is provided on the outer side of the clamping portion of the assembly robot, and the abutment frame abuts against the top end of the upper connecting ring when the assembly robot is assembled.

10. An automatic calibration method for assembling a press pump head based on automatic calibration, using an automatic calibration press pump head assembly machine according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Insert the pump casing vertically into the positioning channel, with the annular flange abutting the top of the channel and the positioning head remaining in its initial position; Step 2: The rotating disk drives the pump casing to the assembly station; Step 3: The assembly robot grabs the parts for plug-in assembly. At the same time, the positioning and rotating composite mechanism is activated, driving the positioning head to move radially against the pump casing for positioning, and driving the pump casing to dock and calibrate with the parts in a rotating state; Step 4: The current station assembly is completed, the assembly manipulator and positioning head are reset, and the composite mechanism stops; the rotating disk moves the pump casing to the next station, and step 3 is repeated; Step 5: The finished pump head is transferred to the unloading station, where the assembly robot picks up the parts and unloads them; the rotating disc receives the new pump casing, and the entire process is repeated.

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