An automated assembly apparatus for a hydraulic mount

Abstract

The application discloses an automatic assembling device of a hydraulic suspension and relates to the technical field of the hydraulic suspension, and aims to solve the technical problem that breakage is prone to occur when two parts contact in the press-fitting process. The flexible assembling mode of "spiral transmission pre-shrinking+thermal expansion and shrinkage" is adopted, so that the problems of rubber main spring tearing and shell chamfer deformation are avoided, and the structural integrity of the parts is ensured; the safety constraint structure of the shape memory polymer is carried, which can quickly harden to form a rigid barrier when abnormity occurs, limit the overtravel deformation of the expansion arc, and improve the stability of the assembling process; with the aid of the spiral concave cavity stamping design, the mortise and tenon type micro bonding structure is formed on the surface of the rubber main spring, the bonding area is increased and the stress is dispersed, the connection strength is strengthened, and the high-frequency vibration working condition is adapted; the damage, risk and reliability problems of the traditional press-fitting are solved through the cooperation of the three, and efficient guarantee is provided for the stable assembling of the hydraulic suspension.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic suspension assembly, more particularly to an automatic assembly equipment for hydraulic suspension. BACKGROUND

[0002] In the automobile powertrain suspension system, the hydraulic suspension becomes the core component for reducing engine vibration and improving driving comfort due to its excellent vibration isolation performance. The rubber main spring and the working cavity shell are the key components of the hydraulic suspension. The rubber main spring, as the core element for vibration transmission and buffering, needs to be tightly matched with the working cavity shell through press fitting and bonding to form a sealed hydraulic working cavity. However, due to the difference in material properties between the rubber and the hard shell (elasticity of rubber and rigidity of hard shell), problems may occur in the press fitting and bonding process of the existing rubber main spring and working cavity shell.

[0003] Firstly, the bonding area of the rubber main spring is made of rubber material, which has a certain elasticity. However, during press fitting, the rubber material needs to withstand axial pressure to achieve interference fit with the shell. If the press fitting force is not properly controlled or the press fitting speed is too fast, the plastic deformation of the rubber material may exceed its elastic limit, especially at the edge part in contact with the shell, as the force is concentrated and the rubber has limited ductility, which is prone to tearing and cracking, resulting in failure of the hydraulic working cavity seal. Secondly, the working cavity shell is prone to plastic deformation. During the press fitting process, the rubber main spring will generate a radial expansion force under axial pressure. This expansion force is concentrated on the chamfered area of the shell inlet (stress concentration point) at the initial contact. If the shell is made of a material with low yield strength, the radial expansion force may exceed the bearing limit of the shell material, causing plastic deformation at the chamfered part, such as concave, outward turning or edge warping. This deformation will damage the sealing surface between the shell and the rubber main spring, making them unable to form a uniform and tightly sealed structure. Thirdly, the design defect of the chamfered inlet of the shell exacerbates the assembly damage. Some working cavity shell inlets have a right-angle transition or a chamfer size that is too small (e.g., chamfer width < 1.5 mm), which forms a "blade" structure at the inlet, resulting in a decrease in the actual contact area and a sudden increase in local stress, which can easily cause the rubber main spring edge to be "cut" and produce micro cracks, weakening the structural strength of the rubber main spring. In view of this, we propose an automatic assembly equipment for hydraulic suspension. SUMMARY

[0004] The present application aims to provide an automatic assembly equipment for hydraulic suspension to solve the technical problem of easy damage during press fitting.

[0005] To solve the above technical problems, the present application provides the following technical solutions: an automatic assembly equipment of hydraulic suspension, comprising a press machine body, a workbench is arranged on the press machine body, a clamping concave is arranged on the top of the workbench for placing a work cavity shell, a punch head is arranged above the workbench, the punch head is fixed with a rubber main spring through vacuum suction, and a press gas cylinder is connected to the top center of the punch head;

[0006] An annular driving ring body is arranged above the clamping concave, an arc sleeve is arranged on the outer periphery of the driving ring body, a connecting column is connected between the arc sleeve and the workbench, a driving spiral with a spiral trajectory is extended from the top wall of the driving ring body, a plurality of rotating driving gears are arranged above the driving spiral, the sawtooth rotation gap of the rotating driving gears is the same as the spiral gap of the driving spiral, and a connecting frame is fixed between the rotating driving gears and the workbench.

[0007] A rotating driving arm is fixed on the outer periphery of the rotating driving gear, the rotating driving arm is in a hook-shaped structure, a curved arc plate is arranged at one end of the rotating driving arm, a plurality of curved arc plates form a ring body with the same outer peripheral size as the bonding part of the rubber main spring, and the curved arc plate contains a heat-expandable material and a heating element.

[0008] Preferably, a sawtooth is fixed on the bottom edge of the driving ring body, the sawtooth is engaged with a main driving gear, and the main driving gear is connected with a first motor.

[0009] Preferably, the curved arc plate is composed of a fixed arc and an expansion arc, the expansion arc is made of a heat-expandable material, the heating element is arranged on the side wall of the expansion arc, a rubber arc is bonded between the fixed arc and the expansion arc, the rubber arc is made of a rubber material, the heating element is arranged in a snake shape, and the heating element is connected with an external power supply.

[0010] Preferably, a shape memory polymer is bonded to the inner ring of the expansion arc, the bonding points of the shape memory polymer are located at both ends, the shape memory polymer is made of a heat-hardenable material, a redundant cavity is arranged on the inner side wall of the shape memory polymer, and a temperature insulation arc is bonded to the inner ring of the shape memory polymer, the temperature insulation arc is made of a honeycomb-shaped elastic material.

[0011] Preferably, a rectangular-shaped sliding groove with an arc-shaped trajectory is arranged at the bottom of the fixed arc, a rectangular arc block is connected to the end of the rotating driving arm, and a plurality of press cavity convex teeth are connected to the outer periphery of the expansion arc.

[0012] Preferably, a sawtooth is integrally formed on the bottom edge of the fixed arc, the sawtooth is engaged with a rotating gear, a second motor is connected to one end of the rotating gear, and a reset latex column is connected between the fixed arc and the connecting frame.

[0013] Preferably, the rotating drive arm is further connected with a curved connecting arm, one end of the curved connecting arm is provided with a bubble suction structure, and the bubble suction structure is composed of an air curtain element and a gas collecting element.

[0014] Preferably, the air curtain element comprises an arc pipe, the arc pipe is an arc-shaped pipe body with a hollow inside and through both ends, a plurality of exhaust ports are connected to the top of the arc pipe, a through groove is arranged on the arc pipe near the gap position between the working cavity shell and the compression fit, and the outer peripheral part of the through groove is a straight edge that is attached to the outer periphery of the working cavity shell.

[0015] Preferably, the gas collecting element comprises an arc sleeve provided with a one-way air valve, a piston arc head is arranged in the inside of the arc sleeve, a plurality of inclined gas guide pipes are in communication between the top of the arc sleeve and the bottom of the arc pipe, a plurality of return springs are connected between the piston arc head and the arc sleeve, a piston push plate is connected to one side of the piston arc head, and the piston push plate is connected with the curved connecting arm.

[0016] Preferably, the outer walls of the plurality of arc sleeves are tightly attached to each other during rotation, and the adjacent through side walls of the plurality of arc pipes can be attached to each other for communication.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The present application realizes non-destructive compression fitting through double innovation structure. Firstly, the precise spiral transmission of the driving ring body and the rotating drive gear drives a plurality of curved arc plates to be synchronously gathered to uniformly pre-shrink the rubber main spring bonding part, so that it is adapted to the gap between the shell inlet, avoiding edge tearing caused by hard contact. Secondly, the curved arc plate adopts a combination design of "fixed arc + expansion arc". The initial inner diameter of the ring body is larger than the outer diameter of the rubber main spring. The expansion arc is uniformly expanded by a serpentine heating element to realize the reduction in diameter, replacing the traditional rigid clamping, and eliminating the clamping injury caused by local stress concentration. This flexible reduction method of "pre-shrinking + thermal expansion" not only solves the assembly problem of interference fit, but also protects the elastic structure of the rubber main spring and the geometric precision of the shell, completely avoiding the damage of components caused by uncontrolled stress in the prior art, and solving the problem of easy damage when the two are in contact during compression fitting.

[0019] 2. The present application also significantly improves the stability of the assembly process by loading a shape memory polymer safety restraint structure. At room temperature, the shape memory polymer of poly norbornene material is in a soft state and can be adaptively attached with the rubber main spring, without affecting the normal reduction in diameter. When the heating temperature exceeds the safety threshold, the polymer rapidly hardens to form a rigid barrier, limiting the overtravel deformation of the expansion arc through the ring structure fixed at both ends, avoiding irreversible damage to the rubber main spring due to high temperature and high pressure. The redundant cavity design can also store the polymer deformation allowance to prevent stress concentration from damaging the equipment structure after hardening. In combination with the uniform stress transmission of the temperature isolation arc, a double protection of "self-adaptation in normal working state and strong restraint in abnormal state" is formed, effectively reducing the production risk caused by circuit or heating element failure.

[0020] 3、The present application also greatly improves the bonding stability from the perspective of mechanical interlocking through the spiral concave impression structure, perfectly adapts to the high-frequency vibration working environment of the hydraulic suspension; during the press-fitting process, the second motor drives the fixed arc to rotate, driving the pressure cavity protrusions on the outer periphery of the expansion arc to press out continuous spiral concave cavities on the surface of the rubber main spring, forming a micro combined structure similar to mortise and tenon; this design not only increases the bonding contact area, but also makes the adhesive fill form a spiral "anchor" after filling, effectively resisting axial tension and radial shear force; at the same time, the spiral path can disperse external force, avoid bonding failure caused by local stress concentration, solve the pain point that the existing planar bonding is easy to fall off in the vibration environment, and make the connection strength of the rubber main spring and the shell more meet the severe use requirements of the automobile power assembly.

[0021] 4、The present application also innovatively designs a synchronous air curtain defoaming structure, realizes precise cooperation of defoaming and press-fitting; when the fixed arc is rotated open in advance and the press-fitting is close to completion, the curved connecting arm drives the foam suction structure to move, the straight edge of the arc pipe is limited by the outer periphery of the shell, and the air curtain is precisely covered to ensure that the air curtain precisely covers the press-fitting gap; the piston push plate drives the piston arc head to extrude the gas, which is delivered to the arc pipe through the gas guide pipe to form a ring-shaped air curtain, and the residual bubbles in the gap are quickly absorbed through the pressure difference; the communication design of multiple arc pipes ensures global coverage, and the one-way air valve and the reset spring cooperate to realize quick reset, so that the defoaming action and the press-fitting instant are precisely matched, completely avoiding the problem that bubbles occupy the bonding area and cause stress concentration, which not only strengthens the bonding reliability, but also guarantees the sealing performance of the hydraulic working chamber, and eliminates the risk of leakage.

[0022] 5、The present application also realizes full-process automation cooperation from pre-shrinking, diameter reduction, impression to defoaming through multi-structure linkage design, greatly improves production efficiency and product consistency, and realizes precise cooperation of each structure action through motor drive, gear meshing and connecting rod linkage without manual intervention, reduces operation error, and ensures that the assembly parameters of each group of components are highly unified through precise control of the folding amplitude of the curved arc plate by the spiral transmission, electronic control of the heating temperature and synchronous matching of the defoaming opportunity, avoiding quality fluctuations caused by manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present application.

[0024] Figure 2 It is a structural schematic diagram of the work platform part in the present application.

[0025] Figure 3 It is a structural schematic diagram of the driving ring body and a single curved arc plate in the present application.

[0026] Figure 4 It is a structural schematic diagram of the driving spiral in the present application.

[0027] Figure 5 For the application Figure 3 Enlarged schematic view of the structure at A in the application.

[0028] Figure 6 For the application, the structure of the rotating arm and the curved arc plate is shown in the bottom view.

[0029] Figure 7 For the application, the structure of the curved arc plate is shown in the bottom view.

[0030] Figure 8 For the application, the structure of the connecting frame is shown in the bottom view.

[0031] Figure 9 For the application, the structure of the suction bubble structure when rotated to the working position is shown in the bottom view.

[0032] Figure 10 For the application, the structure of the suction bubble structure is shown in the bottom view.

[0033] Figure 11 For the application, the structure of the air curtain element is shown in the bottom view.

[0034] Explanation of figure numbers:

[0035] 1, main body of the press; 2, workbench; 3, clamping cavity; 4, punch head; 5, press cylinder; 6, drive ring body; 7, arc sleeve; 8, connecting column; 9, drive screw; 10, rotating drive gear; 11, connecting frame; 12, main drive gear; 13, first motor; 14, rotating arm; 15, curved arc plate; 16, rotating gear; 17, second motor; 18, reset latex column; 19, curved connecting arm; 20, suction bubble structure; 21, reset spring;

[0036] 151, fixed arc; 152, expansion arc; 153, rubber arc; 154, heating element; 155, shape memory polymer; 156, redundant cavity; 157, temperature isolation arc; 158, pressure cavity convex tooth; 201, air curtain element; 202, gas collecting element; 2011, arc tube; 2012, exhaust port; 2013, straight edge; 2021, arc plug sleeve; 2022, piston arc head; 2023, gas guide pipe; 2024, piston push plate. DETAILED DESCRIPTION

[0037] As Figures 1 to 11As shown, the hydraulic suspension automation assembly device of the present application comprises a press body 1, the press body 1 is provided with a workbench 2, the top of the workbench 2 is provided with a clamping concave cavity 3 for placing the work cavity shell, the upper side of the workbench 2 is provided with a stamping head 4, the stamping head 4 is fixed with a rubber main spring by vacuum suction, the vacuum suction is realized by a gas pump and a suction cup, the top center of the stamping head 4 is connected with a press gas cylinder 5, in addition to the above structure, it also has a conveying structure, a material lifting structure and the like, the above is the existing technology of the press, therefore, it will not be described here.

[0038] The upper side of the clamping concave cavity 3 is arranged with an annular driving ring body 6, the outer periphery of the driving ring body 6 is provided with an arc sleeve 7, the arc sleeve 7 is connected with a connecting column 8, the top wall of the driving ring body 6 extends a driving spiral 9 in a spiral trajectory, the upper side of the driving spiral 9 is provided with a plurality of rotating driving gears 10, the sawtooth rotation gap of the rotating driving gears 10 is the same as the spiral gap of the driving spiral 9, the gap between the driving spiral 9 and the rotating driving gears 10 is accurately matched, the spiral transmission has the characteristics of stability and labor saving, can efficiently convert the rotary power into the radial movement force of the cam plates 15, ensures the synchronous action of the plurality of cam plates 15, avoids the uneven force of the rubber main spring caused by the deviation of the single plate body, the transmission ratio of the spiral structure is stable, can accurately control the folding amplitude of the cam plates 15, realizes the micro-shrinking adjustment of the diameter of the rubber main spring.

[0039] The connecting frame 11 is fixed between the rotating driving gears 10 and the workbench 2, the bottom edge of the driving ring body 6 is fixed with a sawtooth, the sawtooth is engaged with a main driving gear 12, the main driving gear 12 is connected with a first motor 13, the outer periphery of the rotating driving gear 10 is fixed with a rotating driving arm 14, the rotating driving arm 14 is a hook-shaped structure, the hook-shaped structure can avoid the motion interference in the process of rotating, one end of the rotating driving arm 14 is provided with a cam plate 15, the rotating driving arm 14 and the cam plate 15 can be slidingly connected or fixedly connected, the plurality of cam plates 15 form a ring body with the same outer diameter as the bonding part of the rubber main spring.

[0040] Working principle: when in use, the work cavity shell is positioned and fixed in the clamping concave cavity 3 of the workbench 2, the stamping head 4 adsorbs and fixes the rubber main spring by vacuum suction, ensures that the rubber main spring is coaxial with the stamping head 4, at this time, the plurality of cam plates 15 are in the initial open state, the inner diameter of the ring body formed by the plurality of cam plates 15 is slightly larger than the outer diameter of the bonding part of the rubber main spring, avoids the contact damage of the rubber main spring when being put in, and reserves space for subsequent pre-shrinking action.

[0041] Start the first motor 13, the first motor 13 drives the main driving gear 12 to rotate, the main driving gear 12 drives the annular driving ring body 6 to rotate around the center axis through the sawtooth engagement, the arc sleeve 7 on the outer periphery of the driving ring body 6 cooperates with the connecting column 8, ensures that the driving ring body 6 remains stable during rotation, avoids the deviation affecting the power transmission accuracy.

[0042] The driving spiral 9 on the top wall of the driving ring body 6 rotates synchronously with the ring body, and since the sawtooth rotation gap of the driving gear 10 is completely matched with the spiral gap of the driving spiral 9, the spiral tooth surface of the driving spiral 9 is in meshing transmission with the sawtooth of the driving gear 10, the spiral transmission converts the rotary motion of the driving ring body 6 into the rotary motion of the driving gear 10 around the shaft, and the driving gear 10 drives the outer periphery fixed driving arm 14 to rotate synchronously.

[0043] The driving arm 14 is in the form of a hook, and when it rotates, the curved arc plates 15 at the end gather towards the rubber main spring, and the plurality of curved arc plates 15 move synchronously inward, gradually reducing the inner diameter of the ring body, and exerting uniform radial constraint force on the bonding part of the rubber main spring, realizing the pre-shrinking effect of slightly reducing the diameter, and the bonding part of the rubber main spring after pre-shrinking is matched with the gap between the inlet of the working cavity shell and the punch head 4, so that the rubber main spring can be smoothly inserted into the working cavity shell when the punch head 4 is pressed down under the drive of the pressing cylinder 5, avoiding edge tearing or shell chamfer damage caused by improper initial contact gap, and laying a foundation for subsequent close bonding.

[0044] In order to avoid the rotation of the curved arc plate 15 being interfered, it is necessary to rotate open a period of time in advance at the stage of almost completely pressing.

[0045] Further, although the use of the annular clamping can reduce the diameter of the bonding part of the rubber main spring, the clamping force stress is not easy to control, and when the adjacent sides of the plurality of curved arc plates 15 gradually approach during clamping, the rubber main spring is easily damaged, and the present application adopts a different way, first, the inner diameter of the ring body is greater than the diameter of the bonding part of the rubber main spring, so that it is not damaged during the entering process, and then the bonding part of the rubber main spring is uniformly expanded by heating and expanding, so as to realize uniform diameter reduction of the stress, and ensure that the insertion process is not damaged, and the increased structure is as follows.

[0046] The curved arc plate 15 is composed of a fixed arc 151 and an expansion arc 152, the expansion arc 152 is made of a heat-expandable material, a heating element 154 is arranged on the side wall of the expansion arc 152, a rubber arc 153 is bonded between the fixed arc 151 and the expansion arc 152, the rubber arc 153 is made of rubber material, the heating element 154 is uniformly arranged in the form of a snake, and the heating element 154 is connected with an external power source. When the expansion arc 152 expands, the elasticity of the rubber arc 153 can adapt to it, avoiding stress pulling during expansion, which causes damage to the fixed arc 151 and the expansion arc 152.

[0047] Working principle: after being driven by the pre-stage driving structure, the plurality of curved arc plates 15 form a ring structure, and the initial inner diameter is greater than the outer diameter of the bonding part of the rubber main spring. After the rubber main spring is adsorbed and fixed by the punch head 4, the ring structure pre-surrounds the rubber main spring from the outer periphery.

[0048] When the external power is turned on, the serpentine heating element 154 on the side wall of the expansion arc 152 (the heating temperature of the heating element 154 needs to be controlled, which can be controlled by existing electronic components, which is prior art and will not be described in detail) uniformly generates heat, and the heat is transmitted to the expansion arc 152 made of a heat-expandable material, so that the expansion arc 152 synchronously deforms, and the rubber arc 153 between the fixed arc 151 and the expansion arc 152 adapts to the deformation of the expansion arc 152 by using its elasticity, so as to avoid stress pulling and causing structural damage.

[0049] The expansion arc 152 uniformly expands towards the center of the ring, drives the whole curved arc plate 15 to synchronously shrink inward, the inner diameter of the ring structure gradually decreases, uniformly applies a radial constraint force to the rubber main spring bonding part, realizes the diameter-reducing effect of diameter shrinkage, and the whole process is uniform in heating and synchronous in expansion, so that the rubber main spring is balanced in stress and there is no local stress concentration, which not only completes the diameter-reducing effect for subsequent insertion, but also avoids clamping or tearing damage.

[0050] Further, the above-mentioned uniform expansion is realized, but the degree of expansion lacks a structure for safety control. If the heating element 154 or the circuit has a problem, it is easy to cause excessive expansion, which may cause damage to the rubber main spring bonding part. In view of this point, the following structure is designed.

[0051] The expansion arc 152 is bonded with a shape memory polymer 155, and the bonding points of the shape memory polymer 155 are located at both ends. The shape memory polymer 155 is made of a material that can be hardened by heat. A redundant cavity 156 is formed in the inner side wall of the shape memory polymer 155, which serves to store part of the shape memory polymer 155. A temperature insulation arc 157 is bonded to the inner circle of the shape memory polymer 155, and is also bonded to both ends. The temperature insulation arc 157 is made of a honeycomb-shaped elastic material, which can adapt to slight expansion. The temperature insulation arc 157 is preferably made of automobile tire rubber material, and has a hardness of 60-70 and a honeycomb pore diameter of 1 mm, so that it has a certain hardness and the rubber main spring can be uniformly stressed.

[0052] The shape memory polymer 155 is preferably poly norbornene, and the phase change temperature is set to 65°C. The poly norbornene is in a soft state at room temperature (<65°C) and can adapt to the slight deformation of the rubber main spring. When the heating temperature of the ring body is too high (>65°C, which may cause the rubber to overheat and age), the polymer rapidly hardens, increases the rigidity of the buffer unit, indirectly limits the excessive expansion of the ring body, and avoids irreversible damage to the rubber due to high temperature and high pressure.

[0053] The expansion arc 152 can be selected as a shape memory alloy or expanded graphite, etc., with a deformation expansion temperature controlled at about 50°C. The shape memory alloy and the expanded graphite, the recovery force of the shape memory alloy in the phase transition process is not infinite, and the hardened shape memory polymer 155 can limit the excessive expansion of the shape memory alloy by its own rigidity, and realize the control of the overall structure deformation; the expansion of the expanded graphite is relatively flexible, although its expansion range is large, but the shape memory polymer 155 can constrain its expansion direction and degree after hardening, and the shape memory polymer 155 like a wrapped or supporting structure limits the excessive expansion of the expanded graphite in some directions, and guides the expansion force to the desired direction, for example, for applying uniform pressure to the rubber main spring.

[0054] Working principle: at room temperature (<65°C), the shape memory polymer 155 of polynorbornene material is in a soft state, only the two ends are bonded with the expansion arc 152, and can be self-adapted to fit with the slight deformation of the rubber main spring. The temperature isolation arc 157 on the inside relies on the elasticity to adapt to the normal expansion of the expansion arc 152, while uniformly transmitting the pressure, and ensuring that the rubber main spring is balanced in the process of reducing the diameter.

[0055] If the heating element 154 or the circuit fails to cause the temperature to exceed 65°C, the shape memory polymer 155 rapidly hardens, and uses its own rigidity to limit the excessive expansion of the expansion arc 152. The redundant cavity 156 can store part of the deformation allowance of the shape memory polymer 155, so as to avoid damage to the structure due to stress concentration after hardening; since the shape memory polymer 155 is bonded and fixed at both ends, the hardened shape memory polymer 155 forms a ring-shaped rigid barrier, which can prevent the over-travel deformation of the expansion arc 152 whether it is a shape memory alloy or expanded graphite, and avoid the rubber main spring being damaged due to excessive reduction in diameter.

[0056] After troubleshooting, the temperature drops below 65°C, the shape memory polymer 155 returns to a soft state, the expansion arc 152 can normally respond to the heating instruction, and the temperature isolation arc 157 also restores the elastic adaptation ability, without affecting the subsequent normal assembly operation.

[0057] Further, in order to strengthen the bonding strength between the rubber main spring and the working cavity shell.

[0058] The bottom of the fixed arc 151 is provided with a rectangular sliding groove with an arc-shaped track, and the end of the rotating arm 14 is connected with a rectangular arc block. The rectangular arc block plays a limiting role, so that the rotation angle of the fixed arc 151 can be stabilized during rotation. The outer periphery of the expansion arc 152 is connected with a plurality of compression cavity protrusions 158. The compression cavity protrusions 158 have a small protruding size and are chamfered to avoid scratching. The bottom edge of the fixed arc 151 is integrally formed with a sawtooth, which is engaged with a rotating gear 16. One end of the rotating gear 16 is connected with a second motor 17. The fixed arc 151 is connected with a reset latex column 18 through the connecting frame 11. The reset latex column 18 is made of latex elastic material. When not under stress, the reset latex column 18 can pull the fixed arc 151 back to its original position to ensure stable engagement between the sawtooth and the rotating gear 16.

[0059] Working principle: when the punch head 4 drives the rubber main spring to press down, the second motor 17 starts to drive the rotating gear 16 to rotate. The sawtooth at the bottom of the fixed arc 151 is engaged with the rotating gear 16, which drives the fixed arc 151 to rotate stably along the arc-shaped sliding groove of the rectangular arc block (the end of the rotating arm 14).

[0060] When the fixed arc 151 rotates, the compression cavity protrusions 158 (with chamfer, small protrusion) on the outer periphery of the expansion arc 152 rotate synchronously around the rubber main spring. As the punch head 4 continues to drop, the compression cavity protrusions 158 press out continuous spiral cavities in the central area of the outer periphery of the rubber main spring.

[0061] The second motor 17 is reset before it stops working to ensure stable engagement next time. After the fixed arc 151 is rotated open, the rotating gear 16 is separated from the sawtooth at the bottom of the fixed arc 151, and the elastic pulling force of the reset latex column 18 pulls the fixed arc 151 back to its original position.

[0062] The spiral concave cavity changes the originally relatively flat shape of the rubber main spring surface. In the micro scale, when the working cavity shell contacts the rubber main spring with the spiral concave cavity, the surface microstructure of the shell can be embedded into the concave cavity. The existence of the concave cavity makes the contact between the rubber main spring and the working cavity shell not limited to planar contact, but forms a micro combination similar to a mortise and tenon structure. The spiral concave cavity provides more anchor points for the adhesive, and the adhesive fills the concave cavity to form a spiral mechanical lock. The adhesive forms a structure similar to an "anchor nail" in the concave cavity, effectively resisting axial tension and radial shear force, and preventing the rubber main spring from separating from the shell. The spiral path of the spiral concave cavity itself increases the circumference of the contact area between the rubber main spring and the working cavity shell. The spiral concave cavity increases the contact area between the rubber main spring and the adhesive, making the adhesive force of the adhesive more uniform and further strengthening the overall bonding stability, adapting to the working condition requirements of high-frequency vibration of the hydraulic mount. Finally, the spiral concave cavity can disperse stress when under stress. When external force acts on the bonding part of the rubber main spring and the working cavity shell, due to the existence of the spiral concave cavity, stress will not be concentrated in a certain point or area, but will be dispersed along the spiral path. For example, when subjected to tensile force, the spiral concave cavity can disperse the tensile force along the spiral line to a larger area, avoiding local stress that is too large to cause bonding failure. This stress dispersion mechanism helps to improve the overall strength of the bonding part and further enhances the bonding effect.

[0063] Further, if there are residual bubbles during the bonding process, the bubbles will occupy the contact area between the adhesive and the rubber main spring and the shell, reducing the effective bonding area. At the same time, the adhesive around the bubbles concentrates stress, and is prone to gas explosion under vibration and tension, leading to cracking or a significant decrease in the connection strength of the rubber main spring and the shell, and in severe cases, the risk of falling off. Therefore, in order to further strengthen the bonding strength between the rubber main spring and the working cavity shell.

[0064] The rotary drive arm 14 is also connected to a curved connecting arm 19, one end of the curved connecting arm 19 is provided with a bubble suction structure 20, and the bubble suction structure 20 is composed of an air curtain element 201 and a gas collecting element 202.

[0065] The air curtain element 201 includes an arc tube 2011, which is an arc-shaped tube body with a hollow inside and through both ends. The arc tube 2011 is connected to a plurality of exhaust ports 2012 at the top. The arc tube 2011 is provided with a through slot near the working cavity shell press-fit gap position. The outer peripheral part of the through slot is a straight edge 2013 that fits the outer periphery of the working cavity shell. The adjacent through side walls of the plurality of arc tubes 2011 can be mutually fitted and communicated. Thus, it can be ensured that the press-fit gap in any peripheral area will be communicated with the through slot.

[0066] The design of the straight edge 2013 plays a limiting role. When the arc tube 2011 is rotated to the press-fitting gap position, it will be completely fitted. The matching is achieved through the design of the arc. At this time, due to the fitting of the straight edge 2013, the limit is generated, so it will not move again. The advantage here is that during the above-mentioned process of rotating the fixed arc 151, the end part is not completely pressed. The design is matched in time with the fitting of the straight edge 2013 during the process of not being completely pressed. When the pressing is completed or is about to be pressed, the air curtain is generated to improve the efficiency of bubble removal.

[0067] The gas collecting member 202 includes an arc plug sleeve 2021 provided with a one-way air valve (not shown in the figure). The one-way air valve can only inhale air inward. The outer walls of the plurality of arc plug sleeves 2021 are tightly attached to each other during rotation. The arc plug sleeve 2021 is internally provided with a piston arc head 2022. A plurality of inclined gas guide pipes 2023 are in communication between the top of the arc plug sleeve 2021 and the bottom of the arc tube 2011. A plurality of return springs 21 are connected between the piston arc head 2022 and the arc plug sleeve 2021. The return springs 21 play a return role. In combination with the one-way air valve, inflation can be achieved to facilitate the next use. The piston arc head 2022 is connected with a piston push plate 2024 on one side. The piston push plate 2024 is connected with the bend connecting arm 19.

[0068] Working principle: The rubber main spring is press-fitted to the stage close to complete fitting. In order to avoid motion interference, the fixed arc 151 starts to rotate and open in advance. The bend connecting arm 19 is rotated synchronously by the rotation driving arm 14. The bend connecting arm 19 pulls the bubble suction structure 20 to move to the press-fitting gap between the rubber main spring and the working cavity shell, until the straight edge 2013 of the arc tube 2011 is completely attached to the periphery of the working cavity shell.

[0069] The bend connecting arm 19 continues to act with the rotation driving arm 14, pushes the piston push plate 2024, and drives the piston arc head 2022 to rotate and move in the arc plug sleeve 2021, extruding the gas in the arc plug sleeve 2021. The outer periphery of the arc plug sleeve 2021 is tightly attached to each other to ensure air tightness. The internal gas is quickly delivered to the arc tube 2011 through the inclined gas guide pipe 2023. A plurality of adjacent connected arc tubes 2011 form a ring-shaped gas flow channel to ensure that the press-fitting gap periphery is covered.

[0070] The high-pressure gas is sprayed out through the plurality of exhaust ports 2012 at the top of the arc tube 2011 to form a ring-shaped air curtain. The flow of the air curtain generates a local pressure difference. Combined with the communication design of the through slot and the press-fitting gap, the residual air bubbles in the gap are quickly absorbed to avoid the air bubbles being trapped in the adhesive to affect the bonding effect.

[0071] After the bubble removal is completed, the bend connecting arm 19 drives the bubble suction structure 20 to return to the initial position. The piston arc head 2022 is reset under the tension of the return spring 21. The arc plug sleeve 2021 inhales external air through the one-way air valve to supplement the internal air pressure, preparing for the next air curtain bubble removal.

[0072] The embodiments of the present application disclosed above are preferred embodiments, but not limited to, those skilled in the art can easily understand the spirit of the present application and make different inferences and changes according to the above embodiments, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. An automated assembly apparatus for hydraulic suspension, characterized by, Including the press fitting machine main part (1), be provided with work platform (2) on the press fitting machine main part (1), the work platform (2) top is opened with the clamping concave cavity (3) for placing work cavity shell, the work platform (2) top is equipped with the punch head (4), the punch head (4), the punch head (4) is fixed with rubber main spring by the way of vacuum suction, the punch head (4) top center is connected with press fitting air cylinder (5); The clamping concave cavity (3) top is arranged with annular drive ring body (6), the drive ring body (6) outer periphery is equipped with arc cover (7), the arc cover (7) is connected with the connecting column (8) of work platform (2), the drive ring body (6) top wall extends the drive helix (9) of spiral trajectory, the drive helix (9) top is equipped with a plurality of rotary drive gear (10), the sawtooth rotation gap of rotary drive gear (10) is same with the spiral gap of drive helix (9), rotary drive gear (10) and work platform (2) between fixed connection frame (11) are fixed. The rotary drive gear (10) outer periphery is fixed with rotary drive arm (14), the rotary drive arm (14) is a hook structure, the rotary drive arm (14) one end is equipped with curved arc plate (15), a plurality of curved arc plate (15) form a ring body with the same size as the outer periphery of the rubber main spring bonding part, the curved arc plate (15) contains heat-expandable material and heating element (154) inside.

2. An automated assembly apparatus for hydraulic mounts as defined in claim 1, wherein, The drive ring body (6) bottom edge is fixed with a sawtooth, the sawtooth is engaged with a main drive gear (12), the main drive gear (12) is connected with a first motor (13).

3. A hydraulic suspension automated assembly apparatus according to claim 2, wherein, The curved arc plate (15) is composed of a fixed arc (151) and an expansion arc (152), the expansion arc (152) is made of a heat-expandable material, the heating element (154) is arranged on the side wall of the expansion arc (152), the fixed arc (151) and the expansion arc (152) are bonded with a rubber arc (153), the rubber arc (153) is made of a rubber material, the heating element (154) is uniformly arranged in a snake shape, and the heating element (154) is connected with an external power source.

4. A hydraulic suspension automated assembly apparatus according to claim 3, wherein, The expansion arc (152) inner ring is bonded with a shape memory polymer (155), the shape memory polymer (155) bonding points are located at both ends, the shape memory polymer (155) is made of a heat-hardenable material, a redundant cavity (156) is formed in the inner side wall of the shape memory polymer (155), and a temperature insulation arc (157) is bonded to the inner ring of the shape memory polymer (155).

5. A hydraulic suspension automated assembly apparatus according to claim 4, wherein, The fixed arc (151) bottom is provided with a rectangular sliding groove with an arc-shaped trajectory, the rotary drive arm (14) end is connected with a rectangular arc block, and the expansion arc (152) outer periphery is connected with a plurality of pressure cavity convex teeth (158).

6. A hydraulic suspension automated assembly apparatus according to claim 5, wherein, The fixed arc (151) bottom edge is integrally formed with a sawtooth, the sawtooth is engaged with a rotary gear (16), one end of the rotary gear (16) is connected with a second motor (17), and the fixed arc (151) and the connecting frame (11) are connected with a reset latex column (18).

7. An automated assembly apparatus of a hydraulic mount according to claim 1 or 6, wherein The rotating driving arm (14) is further connected with a curved connecting arm (19), one end of the curved connecting arm (19) is provided with a bubble suction structure (20), and the bubble suction structure (20) is composed of an air curtain element (201) and a gas collecting element (202).

8. A hydraulic mount automated assembly apparatus as set forth in claim 7 wherein, The air curtain element (201) comprises an arc tube (2011), the arc tube (2011) is an arc-shaped pipe body with hollow inside and through both ends, a plurality of exhaust ports (2012) are connected to the top of the arc tube (2011), and a through groove is formed on the arc tube (2011) near the working cavity shell press-fit gap position, and the outer peripheral part of the through groove is a straight edge (2013) which is attached to the outer periphery of the working cavity shell.

9. A hydraulic suspension automated assembly apparatus according to claim 8, wherein, The gas collecting element (202) comprises an arc sleeve (2021) provided with a one-way air valve, a piston arc head (2022) is arranged in the arc sleeve (2021), a plurality of inclined gas guide pipes (2023) are in communication between the top of the arc sleeve (2021) and the bottom of the arc tube (2011), a plurality of reset springs (21) are connected between the piston arc head (2022) and the arc sleeve (2021), a piston push plate (2024) is connected to one side of the piston arc head (2022), and the piston push plate (2024) is connected with the curved connecting arm (19).

10. A hydraulic suspension automated assembly apparatus according to claim 9, wherein, During the rotation of the plurality of arc sleeves (2021), the outer walls are tightly attached to each other, and the adjacent through side walls of the plurality of arc tubes (2011) can be attached and communicated with each other.

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