A hydraulic bushing full-automatic press-fitting equipment and method

Abstract

The application discloses a kind of hydraulic bushing full-automatic press mounting equipment and method, specifically related to product assembly technical field, the equipment includes assembly pool and press mounting component, press mounting component includes press mounting rod, the inside of assembly pool is further provided with isolation cylinder component, isolation cylinder component includes two groups of half cylinder structure, the bottom of press mounting rod is further provided with piston disc, two groups of half cylinder structure are mutually close and form a complete cylinder structure after being combined, and form piston structure with piston disc after that.The damping liquid in the isolation cylinder component is compressed by piston disc, so that the damping liquid forms pressure to elastic buffer, the pressure makes elastic buffer shrink, offset the expansion deformation when press mounting rod and outer tube form extrusion to elastic buffer, and then reduce the frictional resistance between it and outer tube when assembling, reduce the friction damage of elastic buffer while reducing the press mounting difficulty of elastic buffer, and then effectively improve product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of product assembly, more particularly, the present application relates to a kind of hydraulic bushing full-automatic press equipment and method. BACKGROUND

[0002] Hydraulic bushing is composed of outer tube and elastic buffer, and the elastic buffer is provided with liquid storage cavity to form flow channel (the elastic buffer is rubber part, and part of the elastic buffer is also provided with flow channel plate), and the internal liquid storage cavity and flow channel are filled with damping liquid; when the bushing is impacted by vibration source, the damping liquid will flow in the flow channel, and the impact energy is quickly absorbed, thereby eliminating vibration.

[0003] In order to ensure the damping liquid filling amount, the hydraulic bushing assembly mainly adopts wet assembly, i.e., under-liquid assembly, and after assembly, it still needs to be processed for shrinkage, cleaning, drying and stiffness detection, etc., and the assembly process of the hydraulic bushing is mainly to press the elastic buffer into the metal outer tube by pressure equipment, and then to process the end of the outer tube for shrinkage to improve the sealing effect.

[0004] In order to ensure the effective sealing of the liquid storage cavity and the flow channel, the elastic buffer needs to form effective extrusion and sealing with the outer tube after assembly, that is, during assembly, the elastic buffer needs to be in interference fit with the outer tube, and the higher the sealing requirement of the hydraulic bushing product, the higher the requirement for the degree of the above interference fit, and thus the greater the friction between the elastic buffer and the outer tube during actual assembly.

[0005] Especially for the hydraulic bushing product with long length, during assembly, one end of the elastic buffer is pressed by the pressure equipment, and the other end is resisted by the outer tube, which compresses the elastic buffer and causes the elastic buffer to be upset, thereby further increasing the friction between the elastic buffer and the outer tube, increasing the assembly difficulty, and in severe cases, causing irreversible friction damage to the elastic buffer, affecting the sealing effect of the product and having the risk of liquid leakage. SUMMARY

[0006] The present application provides a kind of hydraulic bushing full-automatic press equipment and method, and the problems to be solved are that the existing hydraulic bushing product with long length is compressed and upset during assembly, the friction between the elastic buffer and the outer tube is increased, and in severe cases, the elastic buffer is damaged by friction, affecting the sealing effect of the product.

[0007] To achieve the above purpose, the present application provides the following technical scheme: a kind of hydraulic bushing full-automatic press equipment, comprising an assembly pool and a press assembly, the assembly pool is used to store damping liquid, and a supporting seat for supporting the outer tube is arranged in the assembly pool;

[0008] The pressing assembly comprises a pressing rod driven by a downward driving device to move up and down, and the inside of the assembling pool is further provided with a separation cylinder assembly comprising two groups of half cylinder structures, and the two groups of half cylinder structures are driven by a combination driving device to move close to or away from the outer tube;

[0009] The bottom of the half cylinder structure is provided with a bottom sealing structure for contacting the outer wall of the outer tube, the bottom of the pressing rod is further provided with a piston disc, and the two groups of half cylinder structures form a complete cylinder structure after moving close to each other and combining, and the piston disc forms a piston structure, and the piston disc is further provided with a pressure relief device.

[0010] In a preferred embodiment, the pressure relief device is a pressure relief valve fixedly installed on the piston disc, and the piston disc is further provided with a liquid injection pipe for inputting damping liquid into the separation cylinder assembly.

[0011] In a preferred embodiment, the supporting seat is provided with a suction seat which is adapted to the bottom end of the elastic buffer, and the bottom of the suction seat is fixedly connected with a downward pull rod which extends downward out of the assembling pool and is in sliding fit with the assembling pool, and the downward pull rod is driven by a downward pull driving device to move up and down.

[0012] In a preferred embodiment, the suction seat is provided with a vacuum suction disc, the suction seat is provided with a vacuum flow channel, and the suction seat is further connected with a vacuum suction pipe which extends downward, is led out of the supporting seat, is then led out of the assembling pool, and is connected with a vacuum suction equipment, the vacuum suction disc is in contact with the rubber part at the bottom end of the elastic buffer, and the vacuum suction disc and the vacuum suction pipe are both in communication with the vacuum flow channel in the suction seat.

[0013] In a preferred embodiment, a heater is installed in the inside of the assembling pool, the heater is used for heating the damping liquid in the assembling pool, liquid flow channels in communication with the inner tube are arranged in the pressing rod and the downward pull rod, a cold flow input pipe is fixedly installed on the pressing rod, a cold flow output pipe is fixedly connected to the upward pull rod, and the cold flow input pipe is connected with a low-temperature liquid supply equipment.

[0014] In a preferred embodiment, the liquid injection pipe is connected with a low-temperature damping liquid supply equipment, the liquid injection pipe is used for inputting low-temperature damping liquid into the separation cylinder assembly, and the inside of the half cylinder structure is provided with a heat insulation layer.

[0015] In a preferred embodiment, a one-way valve is further arranged on the pipeline for installing the pressure relief valve on the piston disc, the one-way valve is in a upward conduction direction, the bottom wall of the piston disc is gradually raised from inside to outside, and the pressure relief valve is arranged close to the edge of the piston disc.

[0016] In a preferred embodiment, the bottom of the liquid injection pipe is also fixedly installed with a downward tube, the bottom end of the downward tube is fixedly installed with a spoiler ring, the spoiler ring is arranged close to the elastic buffer, and the spoiler ring mechanically stirs the damping liquid around the elastic buffer during the process of following the piston disc to move downward.

[0017] In a preferred embodiment, the spoiler ring is coaxially arranged with the elastic buffer, the spoiler ring is a hollow ring structure, a plurality of inclined upward inclined flow holes are formed on the inner wall of the spoiler ring, and the downward tube is a hollow tube structure and communicates with the inner cavity of the spoiler ring.

[0018] A full-automatic pressure assembly method of a hydraulic bushing, comprising the following steps:

[0019] Step one, the outer tube is clamped into the assembly pool by the mechanical clamping jaw and placed on the supporting seat;

[0020] Step two, the elastic buffer is clamped into the assembly pool by the mechanical clamping jaw and placed on the outer tube;

[0021] Step three, the pressure assembly rod is controlled to move downward, the pressure head is in contact with the top end of the elastic buffer for pre-extrusion, and the two groups of half cylinder structures are controlled to approach each other for combination, so that the half cylinder structures are in contact with and closed to the outer tube and the piston disc;

[0022] Step four, the pressure assembly rod is controlled to move upward, and a negative pressure area is formed in the isolation cylinder assembly by the piston action of the piston disc;

[0023] Step five, the pressure assembly rod is controlled to move downward, the elastic buffer is continuously pressed by the pressure assembly rod for pressure assembly, and the damping liquid in the isolation cylinder assembly is pressed by the piston disc;

[0024] Step six, after the pressure assembly is completed, the half cylinder structures are controlled to be separated, the pressure assembly rod is controlled to move upward, and the pressure-assembled hydraulic bushing product is taken out by the mechanical clamping jaw.

[0025] The beneficial effects of the present application are that: by arranging the two groups of half cylinder structures and the piston disc to form a piston structure, the damping liquid in the isolation cylinder assembly is compressed by the piston disc during pressure assembly, so that the damping liquid forms a pressure on the elastic buffer, the pressure makes the elastic buffer shrink, offsets the expansion deformation of the elastic buffer when the pressure assembly rod and the outer tube extrude the elastic buffer, and further reduces the frictional resistance during assembly between the elastic buffer and the outer tube. At the same time, since the damping liquid is pre-pressed into the liquid storage cavity of the elastic buffer and the fine gap between the elastic buffer and the outer tube after compression, the damping liquid can also form a lubricating effect, which reduces the pressure assembly difficulty of the elastic buffer, reduces the frictional damage of the elastic buffer, and further effectively improves the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0027] Figure 2 The schematic diagram of the composition of the hydraulic bushing product assembled by the present application.

[0028] Figure 3 The schematic diagram of the internal structure of the assembly pool of the present application.

[0029] Figure 4 The state diagram of the elastic buffer when the damping liquid in the isolation cylinder assembly exerts pressure on the elastic buffer during the pressing assembly of the elastic buffer of the present application.

[0030] Figure 5 The schematic diagram of the structure after the elastic buffer is completely pressed into the outer tube of the present application.

[0031] Figure 6 The schematic diagram of the structure after the pulling-down assembly is added of the present application.

[0032] Figure 7 The enlarged view of the B structure of the present application. Figure 6

[0033] Figure 8 The state diagram when the bubbles are removed by vacuumizing of the present application.

[0034] Figure 9 The enlarged view of the A structure of the present application. Figure 8

[0035] Figure 10 The plan view when the turbulence ring cooperates with the elastic buffer of the present application.

[0036] Figure 11 The flow chart of the pressing assembly method of the present application.

[0037] The reference signs are: 1, assembly pool; 11, supporting seat; 12, heater; 2, pressing assembly; 21, pressing rod; 211, cold flow input pipe; 22, piston disc; 23, pressing driver; 24, pressure relief valve; 241, one-way valve; 25, liquid injection pipe; 26, downward extending pipe; 27, turbulence ring; 271, inclined flow hole; 3, hydraulic bushing product; 31, outer tube; 32, elastic buffer; 33, inner tube; 4, isolation cylinder assembly; 41, half-cylinder structure; 42, combination driver; 5, adsorption seat; 51, pulling-down rod; 511, cold flow output pipe; 52, pulling-down driver; 53, vacuum suction disc; 54, vacuumizing pipe. DETAILED DESCRIPTION

[0038] ​​The application will be further described in detail below with reference to the drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the application and cannot be understood as limiting the scope of protection of the application. Those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0039] Referring to the drawings accompanying the specification Figures 1 to 9 A kind of hydraulic bushing full-automatic press equipment and, including assembly pool 1 and press assembly 2, assembly pool 1 is used to store damping fluid, the damping fluid is commonly used in the field of hydraulic bushing damping fluid, by under-liquid assembly, make hydraulic bushing product 3 fill into damping fluid, and assembly pool 1 is provided with the support seat 11 for supporting outer tube 31, press assembly 2 includes press rod 21, press rod 21 is driven by lower drive 23 to move up and down, the bottom of press rod 21 is provided with the pressure head structure mutually adapted with the top of elastic buffer 32, and assembly pool 1 and lower drive 23 are installed on the same machine, simultaneously, the device is also equipped with the feeding assembly for the feeding of outer tube 31 and elastic buffer 32 and the mechanical gripper structure for the feeding operation of outer tube 31 and elastic buffer 32, outer tube 31 is placed on support seat 11 after being grabbed by mechanical gripper, then elastic buffer 32 (inner tube 33 is directly formed in elastic buffer 32 when elastic buffer 32 is produced, it is an integral structure, and for part of elastic buffer 32 with runner plate structure, runner plate is also pre-assembled on elastic buffer 32 by mechanical gripper) is placed above outer tube 31 in assembly pool 1 and is immersed below the damping fluid level, then press rod 21 is driven to descend by lower drive 23, and elastic buffer 32 is pressed, i.e. elastic buffer 32 can be completely assembled into outer tube 31.

[0040] It should be noted that the above scheme is a commonly used scheme for assembling hydraulic bushing product 3, therefore, the feeding and discharging scheme is not explained in detail in this embodiment, and lower drive 23 can also adopt a commonly used hydraulic cylinder structure, except that, in this embodiment, a separation cylinder assembly 4 is also arranged in the interior of assembly pool 1, the separation cylinder assembly 4 includes two groups of half cylinder structures 41, the two groups of half cylinder structures 41 are slidingly arranged in assembly pool 1, and the two groups of half cylinder structures 41 are driven to move by body driver 42 to approach or move away from outer tube 31, the bottom of half cylinder structure 41 is provided with bottom sealing structure for contacting the outer wall of outer tube 31, and the two groups of half cylinder structures 41 form a complete cylinder structure after approaching and combining each other, the bottom of press rod 21 is also provided with piston disc 22, and piston disc 22 is slidingly matched with half cylinder structure 41.

[0041] The sealing members are arranged on the joint surface of the half-cylinder structure 41 and the surface of the bottom sealing structure of the half-cylinder structure 41 which is attached to the outer tube 31, and the sealing members are also arranged between the piston disc 22 and the cylinder structure formed by the two groups of half-cylinder structures 41, so that the three form a piston structure.

[0042] In actual assembly, after the outer tube 31 and the elastic buffer 32 are placed in position, the pressing rod 21 is controlled to move downward, so that the pressing head of the pressing rod 21 contacts the top end of the elastic buffer 32 (if necessary, a tool for supporting the elastic buffer 32 can be arranged, and the tool is automatically removed after the pressing rod 21 contacts the elastic buffer 32), and then the two groups of half-cylinder structures 41 are controlled to move close to each other to seal the outer tube 31, so that the elastic buffer 32 is located in the sealed space formed by the piston disc 22 and the isolation cylinder assembly 4, and the space is filled with the damping liquid. Therefore, as the pressing rod 21 continues to move downward, the piston disc 22 starts to compress the damping liquid in the isolation cylinder assembly 4, so that the damping liquid forms a pressure on the elastic buffer 32. The pressure causes the elastic buffer 32 to shrink, which offsets the expansion deformation of the elastic buffer 32 caused by the extrusion of the pressing rod 21 and the outer tube 31, thereby reducing the frictional resistance between the elastic buffer 32 and the outer tube 31 during assembly. In addition, the damping liquid is pre-pressed into the liquid storage cavity of the elastic buffer 32 and the tiny gap between the elastic buffer 32 and the outer tube 31 after compression, so that the damping liquid also has a lubricating effect, which reduces the frictional damage of the elastic buffer 32 and improves the product quality.

[0043] It should be noted that the pressing rod 21 needs a certain stroke to press the elastic buffer 32, so that the piston disc 22 will eventually be unable to move downward due to the reverse pressure of the damping liquid. Therefore, in order not to affect the pressing of the pressing rod 21, the piston disc 22 is also provided with a pressure relief device, for example, the piston disc 22 is slidingly installed on the pressing rod 21, and an elastic member (spring) is arranged between the piston disc 22 and the pressing rod 21 to apply pressure to the piston disc 22. When the liquid pressure of the damping liquid in the isolation cylinder assembly 4 increases to a certain degree, the piston disc 22 no longer moves, and the elastic member is compressed, thereby not affecting the pressure on the damping liquid and not affecting the downward movement of the pressing rod 21.

[0044] In addition, referring to the drawings Figure 3 and Figure 4, the pressure relief device can also be selected as a pressure relief valve 24, which is fixedly installed on the piston disc 22. With the continuous pressing of the piston disc 22, the liquid pressure of the damping liquid in the isolation cylinder assembly 4 gradually increases to a certain extent, and then the pressure relief valve 24 can relieve pressure, so that the excess damping liquid is discharged upward from the area below the piston disc 22, thereby not affecting the pressing of the pressing rod 21, and at the same time, the hydraulic pressure below the piston disc 22 can be kept stable. By replacing pressure relief valves 24 of different specifications, different degrees of pressure on the damping liquid can also be achieved.

[0045] At the same time, in addition to increasing the liquid pressure by moving the piston disc 22, a liquid injection pipe 25 can also be provided on the piston disc 22. The liquid injection pipe 25 is connected to a damping liquid supply pump, and the damping liquid is continuously input into the isolation cylinder assembly 4 through the supply pump, so that the pressure of the isolation cylinder assembly 4 can be increased, and the elastic buffer 32 can be pressed inward.

[0046] The above scheme for increasing the liquid pressure in the isolation cylinder assembly 4 can be selected according to actual needs, or can be used in combination, but the principle is to press the elastic buffer 32 inward by the damping liquid, so as to reduce the deformation of the elastic buffer 32 outward and hinder the pressing.

[0047] In the above embodiment, the elastic buffer 32 is mainly pressed inward by the damping liquid to reduce the upsetting deformation of the elastic buffer 32, but the elastic buffer 32 is still subjected to a large axial pressure. Therefore, referring to the drawings Figure 6 and Figure 7 , the present embodiment also provides the following scheme. The support seat 11 is provided with an adsorption seat 5, which is adapted to the bottom end of the elastic buffer 32. The adsorption seat 5 is provided with a vacuum suction cup 53, and the adsorption seat 5 is provided with a vacuum flow channel. The adsorption seat 5 is also connected with a vacuum pipe 54, which extends downward, is led out of the support seat 11, is then led out of the assembly pool 1, and is connected with a vacuum pumping device (vacuum pump). The vacuum suction cup 53 is in contact with the rubber part at the bottom end of the elastic buffer 32 (i.e. avoiding the metal inner tube 33). The vacuum suction cup 53 and the vacuum pipe 54 are in communication with the vacuum flow channel in the adsorption seat 5. At the same time, the bottom of the adsorption seat 5 is fixedly connected with a downward pulling rod 51, which extends downward out of the assembly pool 1 and is in sliding cooperation with the assembly pool 1. At the same time, a corresponding sealing structure is provided. The downward pulling rod 51 is driven by a downward pulling driver 52 to move up and down (wherein the combined driver 42 and the downward pulling driver 52 in the present embodiment can adopt a hydraulic cylinder structure to provide sufficient driving force. The downward pulling driver 52 is fixedly installed in the rack and located below the assembly pool 1).

[0048] Specifically, in the process of the pressing rod 21 downwardly pressing, the adsorption seat 5 is at the bottom of the elastic buffer 32, and the elastic buffer 32 is vacuum adsorbed by the vacuum chuck 53 (the negative pressure adsorption is formed at the vacuum chuck 53 by opening the vacuumizing equipment), and the lower pulling rod 51 is driven to move downwardly by the lower pulling driver 52, so that the adsorption seat 5 is stretched downwardly at the bottom of the elastic buffer 32, and the upsetting phenomenon of the elastic buffer 32 caused by the upward and downward extrusion is reduced. When the suction force of the vacuum chuck 53 is enough, the elastic buffer 32 can also be stretched and thinned.

[0049] Further, in the above embodiment, although the outer tube 31 and the elastic buffer 32 can be automatically fed by the automatic feeding equipment such as the mechanical clamping jaw, when the elastic buffer 32 is placed into the outer tube 31, it can also be slowly operated to reduce the bubble adhesion on the surface of the elastic buffer 32 and in the liquid storage cavity of the elastic buffer 32, but in actual operation, a small amount of bubbles will inevitably remain. Generally, heating the damping liquid to accelerate the release of the bubbles is the simplest and most effective solution, but in the present embodiment, the heating of the damping liquid will cause the elastic buffer 32 to expand due to heat, and then affect the pressing. Therefore, the present embodiment also provides the following technical solutions. Specifically, refer to the accompanying drawings Figure 6 The inside of the assembling pool 1 is provided with a heater 12, the heater 12 is used for heating the damping liquid in the assembling pool 1 to be higher than the room temperature, and cooperating with the temperature detection system and the temperature control system, the damping liquid in the assembling pool 1 is kept in a certain relatively high temperature state, and then when the elastic buffer 32 is just put into the assembling pool 1, it is not easy to form bubble residues.

[0050] At the same time, the pressing rod 21 and the lower pulling rod 51 are both provided with liquid flow channels communicated with the inner tube 33, the pressing rod 21 is fixedly provided with a cold flow input pipe 211, the lower pulling rod 51 is fixedly connected with a cold flow output pipe 511, the cold flow input pipe 211 is connected with a low-temperature liquid supply equipment (for example, a liquid supply pump is used to deliver low-temperature liquid, which can be damping liquid lower than room temperature, but since the inner cavity of the inner tube 33 is relatively isolated from the damping liquid outside during pressing, low-temperature water such as 1-5℃ water can also be directly used), and the cold flow output pipe 511 is connected with a recovery device. After the pressing rod 21 contacts with the elastic buffer 32, the liquid supply pump of the low-temperature liquid supply equipment is opened, the low-temperature liquid is circulated and input into the inner tube 33, the elastic buffer 32 is cooled from inside to outside, so that the internal shrinkage deformation is generated to offset the external thermal expansion deformation.

[0051] In addition, since the above-mentioned embodiment only requires the elastic buffer 32 to keep the damping liquid at a relatively high temperature during the process of being immersed in the damping liquid to reduce the generation of bubbles, after being completely immersed in the damping liquid, the damping liquid in the isolation cylinder assembly 4 does not need to be at a high temperature, and therefore, a heat insulation structure can be arranged in the half-cylinder structure 41, and the liquid injection pipe 25 is connected to a low-temperature damping liquid supply device (for example, using a liquid supply pump to supply damping liquid at a temperature lower than room temperature), so as to input new low-temperature damping liquid through the liquid injection pipe 25 and discharge the original high-temperature damping liquid through the pressure relief valve 24, thereby achieving the cooling of the damping liquid in the isolation cylinder assembly 4, and cooperating with the cooling of the internal region of the elastic buffer 32 by the cold flow input pipe 211, so as to make the elastic buffer 32 as a whole to have a contraction state, thereby further reducing the difficulty of pressure assembly.

[0052] Since the liquid storage cavity and the flow channel in part of the hydraulic bushing product 3 are relatively complex, the difficulty of bubble elimination is relatively large, in addition to the above-mentioned embodiments, in order to improve the bubble elimination effect of the elastic buffer 32, the present embodiment also provides the following technical solutions, specifically, referring to the drawings Figures 8 to 10 The pipeline for installing the pressure relief valve 24 on the piston disc 22 is also provided with a one-way valve 241, the conduction direction of the one-way valve 241 is upward, the piston disc 22 is in a disc-shaped structure, that is, the bottom wall of the piston disc 22 is gradually raised from inside to outside, and the pressure relief valve 24 is arranged close to the edge of the piston disc 22.

[0053] In addition, before formal pressure assembly, the piston disc 22 is first controlled to descend to a certain position, and then the two groups of half-cylinder structures 41 are controlled to be combined, after the piston structure is formed by the half-cylinder structures 41 and the piston disc 22, the piston disc 22 is controlled to move upward by a part, at this time, the external air has a tendency to enter the isolation cylinder assembly 4 in the reverse direction through the pressure relief valve 24, but the one-way valve 241 is closed at this time, and therefore, a certain vacuum effect is formed in the isolation cylinder assembly 4, under the action of the vacuum, the bubbles remaining in the elastic buffer 32 are more easily separated and concentrated upward, especially to the edge of the piston disc 22, and then the pressure assembly rod 21 is controlled to descend and gradually contact the elastic buffer 32 and begin formal pressure assembly, at this time, the piston disc 22 presses downward to form pressure on the damping liquid, and the damping liquid in the isolation cylinder assembly 4 has a tendency to overflow outward through the pressure relief valve 24, at this time, the one-way valve 241 is conducted, and the pressure relief valve 24 normally works, after the damping liquid in the isolation cylinder assembly 4 reaches a certain pressure, the excess damping liquid will be discharged through the pressure relief valve 24, thereby improving the bubble elimination effect without affecting the normal pressure assembly.

[0054] Further, the bottom of the liquid injection pipe 25 is also fixedly installed with a downward pipe 26, the bottom end of the downward pipe 26 is fixedly installed with a spoiler ring 27, the spoiler ring 27 is coaxially arranged with the elastic buffer 32, and then in the process of moving the piston disc 22 downward, the spoiler ring 27 can form a stirring effect on the damping liquid around the elastic buffer 32, and then form liquid flow to improve the elimination effect of the gas bubbles, in addition, the spoiler ring 27 is a hollow ring structure, a plurality of inclined upward inclined flow holes 271 are formed in the inner wall of the spoiler ring 27, the downward pipe 26 is a hollow pipe structure, and the downward pipe 26 is in communication with the inner cavity of the spoiler ring 27, and then when the liquid injection pipe 25 inputs new damping liquid into the isolation cylinder assembly 4, the new damping liquid can flow upward from the inclined flow hole 271, thereby accelerating the flow effect of the damping liquid around the elastic buffer 32, and thereby strengthening the elimination effect of the gas bubble adhesion phenomenon.

[0055] With reference to the drawings accompanying the specification Figure 11 The present application also provides a full-automatic hydraulic bushing press-fitting method, which comprises the following steps:

[0056] Step one, the outer pipe 31 is clamped into the assembly pool 1 by a mechanical clamp jaw and placed on the supporting seat 11;

[0057] Step two, the elastic buffer 32 is clamped into the assembly pool 1 by a mechanical clamp jaw and placed on the outer pipe 31;

[0058] Step three, the press-fitting rod 21 is controlled to move downward, the pressure head is in contact with the top end of the elastic buffer 32 for pre-extrusion, and the two groups of half-cylinder structures 41 are controlled to approach each other for combination, so that the half-cylinder structures 41 are in contact with and closed to the outer pipe 31 and the piston disc 22;

[0059] Step four, the press-fitting rod 21 is controlled to move upward, the piston effect of the piston disc 22 is used to form a negative pressure area in the isolation cylinder assembly 4, and the overflow of the gas bubbles in the elastic buffer 32 is accelerated;

[0060] Step five, the press-fitting rod 21 is controlled to move downward, the press-fitting rod 21 continuously presses the elastic buffer 32 for press-fitting, at the same time, the piston disc 22 presses the damping liquid in the isolation cylinder assembly 4, so that the damping liquid forms an inward compression effect on the elastic buffer 32;

[0061] Step six, after the press-fitting is completed, the half-cylinder structures 41 are controlled to be separated, the press-fitting rod 21 is controlled to move upward, and the press-fitted hydraulic bushing product 3 is taken out by a mechanical clamp jaw;

[0062] Step seven, transfer the hydraulic bushing product 3 to the diameter reducing station, extrude the top of the outer tube 31 to reduce the diameter, so that the elastic buffer 32 is firmly installed in the outer tube 31 (before assembly. The bottom end of the outer tube 31 has been reduced in diameter to avoid the elastic buffer 32 directly penetrating downward through the outer tube 31 to affect the pressing precision, so at this time only the top of the outer tube 31 needs to be reduced in diameter).

[0063] The above embodiments only express several embodiments of the present application, which are described in detail and specifically, but cannot be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application.

Claims

1. A fully automatic press-fitting device for a hydraulic bushing, comprising an assembly tank (1) and a press-fitting assembly (2), wherein the assembly tank (1) is used to store damping fluid, and a supporting seat (11) for supporting an outer tube (31) is provided in the assembly tank (1); The press-fitting assembly (2) comprises a press-fitting rod (21), which is driven by a downward pressing driver (23) to move up and down, and is characterized in that: An isolation cylinder assembly (4) is further provided inside the assembly pool (1), the isolation cylinder assembly (4) comprising two groups of half-cylinder structures (41), and the two groups of half-cylinder structures (41) are respectively driven by a combined driver (42) to move closer to or farther away from the outer tube (31); The bottom of the semi-cylinder structure (41) is provided with a bottom sealing structure for contacting the outer wall of the outer tube (31), and the bottom of the press rod (21) is also provided with a piston disc (22). After the two groups of semi-cylinder structures (41) are close to each other and combined to form a complete cylindrical structure, they form a piston structure with the piston disc (22), and the piston disc (22) is also provided with a pressure relief device.

2. The fully automatic press-fitting equipment for hydraulic bushings according to claim 1, characterized in that: The pressure relief device is a pressure relief valve (24), which is fixedly mounted on the piston disc (22). A liquid injection pipe (25) is also provided on the piston disc (22), and the liquid injection pipe (25) is used to input damping liquid into the isolation cylinder assembly (4).

3. The fully automatic press-fitting equipment for hydraulic bushings according to claim 2, characterized in that: An adsorption seat (5) is provided in the support seat (11), and the adsorption seat (5) and the bottom end of the elastic buffer (32) are adapted to each other. A lower pull rod (51) is fixedly connected to the bottom of the adsorption seat (5), and the lower pull rod (51) extends downward from the assembly pool (1) and is slidably matched with the assembly pool (1). The lower pull rod (51) is driven by a lower pull driver (52) to perform lifting movement.

4. The fully automatic press-fitting equipment for hydraulic bushings according to claim 3 is characterized in that: A vacuum suction cup (53) is provided on the adsorption seat (5), a vacuum flow channel is provided in the adsorption seat (5), and a vacuum pumping tube (54) is connected to the adsorption seat (5). The vacuum pumping tube (54) extends downward, is led out through the supporting seat (11), and then leads out of the assembly pool (1), and is connected to the vacuum pumping equipment. The vacuum suction cup (53) contacts the rubber part at the bottom end of the elastic buffer (32), and the vacuum suction cup (53) and the vacuum pumping tube (54) are both connected to the vacuum flow channel in the adsorption seat (5).

5. The fully automatic press-fitting equipment for hydraulic bushings according to claim 4, characterized in that: A heater (12) is installed inside the assembly pool (1), and the heater (12) is used to heat the damping liquid in the assembly pool (1). The press rod (21) and the lower pull rod (51) are both provided with liquid flow channels connected to the inner tube (33). A cold flow input pipe (211) is fixedly installed on the press rod (21), and a cold flow output pipe (511) is fixedly connected upward to the lower pull rod (51), and the cold flow input pipe (211) is connected to a low-temperature liquid supply device.

6. The fully automatic press-fitting equipment for hydraulic bushings according to claim 5, characterized in that: The injection pipe (25) is connected to a low-temperature damping liquid supply device, and the injection pipe (25) is used to input the low-temperature damping liquid into the isolation cylinder assembly (4). A heat insulation layer is provided inside the semi-cylinder structure (41).

7. The fully automatic press-fitting equipment for hydraulic bushings according to claim 6, characterized in that: A one-way valve (241) is further provided on the pipeline of the piston disc (22) for installing the pressure relief valve (24). The conducting direction of the one-way valve (241) is upward. The bottom wall of the piston disc (22) is gradually raised from the inside to the outside, and the pressure relief valve (24) is provided close to the edge of the piston disc (22).

8. The fully automatic press-fitting equipment for hydraulic bushings according to claim 7, characterized in that: A lower extension tube (26) is fixedly mounted on the bottom of the injection tube (25), and a spoiler ring (27) is fixedly mounted on the bottom end of the lower extension tube (26). The spoiler ring (27) is arranged close to the elastic buffer (32). When the spoiler ring (27) moves downward following the piston disc (22), the damping liquid around the elastic buffer (32) is mechanically stirred.

9. The fully automatic press-fitting equipment for hydraulic bushings according to claim 8, characterized in that: The spoiler ring (27) is coaxially arranged with the elastic buffer member (32). The spoiler ring (27) is a hollow ring structure. A plurality of groups of upwardly inclined oblique flow holes (271) are provided on the inner wall of the spoiler ring (27). The lower extension tube (26) is a hollow tube structure. The lower extension tube (26) is in communication with the inner cavity of the spoiler ring (27).

10. A press-fitting method for the fully automatic press-fitting equipment for hydraulic bushings according to claim 9, characterized in that: The following steps are involved: Step 1: Clamp the outer tube (31) into the assembly tank (1) using a mechanical gripper and place it on the supporting seat (11); Step 2: Using a mechanical gripper, the elastic buffer (32) is clamped into the assembly tank (1) and placed on the outer tube (31); Step 3: Control the pressing rod (21) downward so that the pressing head contacts the top of the elastic buffer (32) for pre-extrusion, and control the two sets of semi-cylinder structures (41) to move closer to each other for merging, so that the semi-cylinder structures (41) contact and seal the outer tube (31) and the piston disc (22); Step 4: Control the press rod (21) to move upward, and form a negative pressure area in the isolation cylinder assembly (4) by means of the piston action of the piston plate (22); Step 5: Control the pressing rod (21) to move downward, and continuously apply pressure to the elastic buffer (32) by means of the pressing rod (21) to perform press-fitting. At the same time, the piston disc (22) applies pressure to the damping fluid in the isolation cylinder assembly (4); Step 6: After the press-fitting is completed, the half-cylinder structure (41) is controlled to separate, and the press-fitting rod (21) is controlled to move upward, and the press-fitted hydraulic bushing product (3) is taken out by the mechanical clamp.

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