Bushing press-fitting equipment

Abstract

The invention relates to the technical field of engine manufacturing, in particular to bush press-fitting equipment which comprises a rack and a workpiece positioning tool, and a press-fitting mechanism, a bush conveying mechanism and a transferring mechanism are sequentially fixed to the rack from top to bottom in the vertical direction; the workpiece positioning tool is arranged under the press-fitting mechanism, fixedly connected with the rack and used for vertically fixing the main bearing cover so that a prefabricated hole in the top of the main bearing cover can face upwards. The first press-fitting end is matched with the lining conveying mechanism when moving downwards, the linings are transferred to the transferring mechanism one by one, and the transferring mechanism transfers the input linings and coaxially sleeves the tail end of the second press-fitting end in the vertical direction. When the second press-fitting end moves downwards, the lining at the tail end of the second press-fitting end is vertically pressed into the prefabricated hole of the main bearing cover; and through cooperation of the multiple mechanisms, the lining is coaxially arranged at the tail end of the second press-fitting end of the press-fitting mechanism in a sleeving mode, and in the descending process of the second press-fitting end, the lining is vertically pressed into a prefabricated hole of the main bearing cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine manufacturing, and in particular to a bushing press-fitting device. BACKGROUND

[0002] In the field of automobile engine manufacturing, the main bearing cover, as one of the key components, functions to fix the main bearing and limit its axial displacement, ensuring the stability and precision of the crankshaft during operation. The machining quality of the main bearing cover directly affects the overall performance and service life of the engine, and therefore, the assembly of the main bearing cover and its related components (such as the bushing) requires very high standards during production.

[0003] Currently, the bushing press-fitting work of the main bearing cover is mostly completed by manual operation. During the process, the main bearing cover needs to be manually installed on the tooling of the hydraulic machine, and the bushing is pre-placed in the preformed hole of the main bearing cover. Then, the hydraulic cylinder of the hydraulic machine is controlled to extend and press the bushing into the preformed hole.

[0004] However, this traditional press-fitting method has obvious defects. On the one hand, due to the lack of precise positioning devices, it is difficult for manual operation to ensure the coaxiality between the bushing and the preformed hole of the main bearing cover, leading to problems such as bushing deflection and deformation during the press-fitting process, thereby affecting the assembly quality. On the other hand, the entire process relies on a large amount of manual operation, has low automation, is cumbersome, and has low production efficiency, making it difficult to meet the demand for high efficiency and high consistency in modern automobile manufacturing industry. SUMMARY

[0005] Therefore, the present application provides a bushing press-fitting device, which cooperates with multiple mechanisms to coaxially sleeve the bushing at the end of the second press-fitting end of the press-fitting mechanism and vertically press the bushing into the preformed hole of the main bearing cover during the downward movement of the second press-fitting end. This structure effectively ensures the coaxiality between the bushing and the preformed hole, avoids deviation or deformation during the press-fitting process, and improves the assembly precision and consistency. At the same time, the device has high automation, reduces the degree of human participation and labor intensity, and improves the production efficiency, meeting the requirements of modern engine manufacturing for high-precision and high-efficiency assembly processes and solving the problems of low press-fitting efficiency and poor assembly precision caused by manual operation in the prior art.

[0006] The technical solution of the present application is as follows: The present application provides a bushing press-fitting device, comprising a rack and a workpiece positioning tool, wherein, a press-fitting mechanism, a bushing conveying mechanism and a transfer mechanism are fixed on the rack in sequence from top to bottom along the vertical direction, and the rear end of the bushing conveying mechanism is connected with a vibration disc for storing bushings; The workpiece positioning fixture is arranged directly below the press-fitting mechanism and is fixedly connected to the frame, and is used to vertically fix the main bearing cap so that the prefabricated hole on the top of the main bearing cap faces upward; The press-fitting mechanism comprises a first press-fitting end and a second press-fitting end. When the first press-fitting end moves downward, it cooperates with the bushing conveying mechanism to transfer the bushings one by one to the transfer mechanism. The transfer mechanism transfers the input bushings and sleeves them vertically and coaxially to the end of the second press-fitting end. When the second press-fitting end moves downward, the bushing at the end thereof is vertically pressed into the prefabricated hole of the main bearing cap.

[0007] On the basis of the above technical solution, preferably, the workpiece positioning tooling includes an electric slide and a tire mold, wherein, The electric slide is fixedly arranged on the frame along the left and right directions; The tire mold is fixed on the slider of the electric slide, and the top of the tire mold is provided with a mounting groove for plugging and positioning with the bottom of the main bearing cover.

[0008] On the basis of the above technical solution, preferably, a positioning pin structure is fixed on the bottom of the installation groove.

[0009] On the basis of the above technical solution, preferably, the bushing conveying mechanism includes a support seat and a translation cylinder, the transfer mechanism includes a translation module and a third lifting module, and the pressing mechanism includes a first lifting module and a second lifting module, wherein, The support seat, the translation module, the first lifting module and the second lifting module are all fixed on the frame, and the second lifting module drives the second press-fitting end to move up and down to perform the bushing press-fitting action; A chute is provided on the top of the support seat, a bushing output hole is provided on one side of the bottom of the chute, and a bushing input port connected to the discharge port of the vibration plate is provided at the rear end of the other side; A translation plate is slidably provided in the slide groove, one end of the translation plate passes through the side end of the support seat and is hinged to the output end of the translation cylinder, and a transfer groove is provided on the rear end of the other end. The translation cylinder drives the translation plate to translate left and right, so that the transfer groove is aligned with the bushing input port front and back, or aligned with the bushing output hole top and bottom; The third lifting module is fixed to the output end of the translation module. A positioning sleeve is fixed to the output end of the third lifting module. The translation module drives the third lifting module to translate back and forth so that the tube mouth of the positioning sleeve is aligned with the bushing output hole or the second press-fitting end in vertical alignment. The first lifting module is arranged just above the bushing output hole and is used to drive the first press-fitting end downward to push the lower end of the bushing into the positioning sleeve; The third lifting module drives the positioning sleeve to move up and down, so that the positioning sleeve moves close to or away from the second pressing end.

[0010] On the basis of the above technical solutions, preferably, the first pressing end is in a cylindrical structure, the transfer groove is in a U-shaped structure, the bushing output hole and the positioning sleeve are in a circular structure, wherein, The outer diameter of the first pressing end is greater than the outer diameter of the bushing and smaller than the groove width of the transfer groove; The groove width of the transfer groove, the width of the bushing input port, the inner diameter of the bushing output hole, and the inner diameter of the positioning sleeve are equal; The inner surfaces of the transfer groove, the bushing input port, the bushing output hole, and the positioning sleeve are coated with a friction-reducing coating.

[0011] On the basis of the above technical solutions, preferably, the rear end of the bushing input port extends backward to form a groove-shaped conveying channel, wherein, The rear end of the conveying channel is horizontally aligned with the discharge port of the vibration disc; The rear end of the conveying channel is higher than the front end, and the groove width gradually increases from the front to the rear; The inner surface of the conveying channel is coated with a friction-reducing coating, and the outer side of the bottom is fixed with a vibration motor.

[0012] On the basis of the above technical solutions, preferably, a limiting plate is fixed on one side of the top of the conveying channel, wherein, The distance between the bottom of the limiting plate and the groove bottom of the conveying channel is greater than the axial length of the bushing.

[0013] On the basis of the above technical solutions, preferably, a guide groove is provided on the top of the support seat, and a positioning protrusion is fixed on the bottom of the translation plate, wherein, The bottom of the positioning protrusion is slidingly arranged in the guide groove in the left-right direction, and the side is hinged to the output end of the translation air cylinder.

[0014] On the basis of the above technical solutions, preferably, the translation module and the third lifting module are gas-driven linear modules, the first lifting module is a linear air cylinder, and the second lifting module is an electric cylinder.

[0015] On the basis of the above technical solutions, preferably, the second pressing end is in a columnar structure, wherein, The bottom end of the second pressing end is provided with a sink, the inner diameter of the sink is equal to the outer diameter of the bushing, and a friction-reducing coating is coated on the inner wall thereof; A boss is provided on the groove bottom of the sink, and the outer diameter of the boss is less than or equal to the inner diameter of the bushing; The spring plunger is provided with a spherical head end for elastically abutting against the inner side surface of the bushing; The side of the second pressing end is provided with an air channel, one end of which is screwed with an air line joint, and the other end is communicated with the sink groove.

[0016] The bushing pressing equipment has the following beneficial effects relative to the prior art: (1) By setting the workpiece positioning tool, pressing mechanism, bushing conveying mechanism and transfer mechanism on the rack, the bushing can be coaxially sleeved on the second pressing end of the pressing mechanism through the coordinated cooperation of multiple mechanisms, and the bushing can be vertically pressed into the prefabricated hole of the main bearing cover during the downward movement of the second pressing end. The structure effectively ensures the coaxiality between the bushing and the prefabricated hole, avoids deviation or deformation during pressing, improves the assembly precision and consistency. At the same time, the equipment has high automation degree, reduces the labor participation and labor intensity, improves the production efficiency, and meets the requirements of modern engine manufacturing on high-precision and high-efficiency assembly process.

[0017] (2) By setting the bushing conveying mechanism composed of a support seat and a translation air cylinder, and the transfer mechanism composed of a translation module and a third lifting module, combined with the first and second pressing ends driven by the first and second lifting modules, the step-by-step transfer and accurate pressing of the bushing are realized. The modules work together, the structure is compact, the action is smooth, and the high precision of the bushing from the vibration disc output to the final pressing into the main bearing cover is ensured, and the equipment running efficiency and stability are improved.

[0018] (3) By designing the first pressing end as a cylindrical structure, the transfer groove as a U-shaped structure, the bushing output port and the positioning sleeve as a circular structure, and setting a friction-reducing coating on each contact surface, the bushing is uniformly stressed and smoothly slides during transmission, effectively reducing friction resistance and preventing surface damage. At the same time, the size matching design ensures the stability and centring of the bushing during transmission and pressing, further improving the assembly quality.

[0019] (4) By setting a slot-shaped conveying channel at the rear end of the bushing input port, and gradually increasing the slot width from front to back and gradually increasing the height, cooperating with the friction-reducing coating and the vibration motor, the smoothness and stability of the bushing during conveying are effectively improved, preventing jamming or accumulation. Combined with the vibration disc, it helps to improve the efficiency and reliability of automatic conveying of the bushing, and provides protection for the smooth performance of subsequent pressing actions.

[0020] (5) By setting the sink groove, boss, spring plunger and air channel structure at the bottom end of the second pressing end, the clamping, positioning and cleaning functions of the bushing are realized. Among them, the sink groove matches the outer diameter of the bushing, the boss cooperates with the spring plunger to realize elastic clamping, and the air channel can be used for cleaning or auxiliary clamping. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

[0022] Figure 1 It is a perspective view of a bushing press-fitting equipment of the present application; Figure 2 It is a perspective view of another view of a bushing press-fitting equipment of the present application; Figure 3 It is a perspective view of another view of a bushing press-fitting equipment of the present application; Figure 1 Figure 4 It is a perspective view of a workpiece positioning tool part; Figure 5 It is a perspective view of a press-fitting mechanism part; Figure 6 It is an enlarged view of point A of the present application; Figure 5 Figure 7 It is a perspective view of a bushing conveying mechanism part; Figure 8 It is a perspective view of a transfer mechanism part; Figure 9 It is a perspective view of a second press-fitting end part; Figure 10 It is a perspective view of a first press-fitting end part; In the drawings: 1, frame; 2, workpiece positioning tool; 3, press-fitting mechanism; 4, bushing conveying mechanism; 5, transfer mechanism; 6, vibration disc; 21, electric sliding table; 22, tire mold; 31, first lifting mold group; 32, second lifting mold group; 34, spring plunger; 35, air line joint; 41, support seat; 42, translation air cylinder; 43, translation plate; 44, limiting plate; 51, translation mold group; 52, third lifting mold group; 211, sliding block; 301, first press-fitting end; 302, second press-fitting end; 431, positioning protrusion; 2201, mounting groove; 4101, sliding groove; 4102, bushing input port; 4103, bushing output hole; 4301, transfer groove; 521, positioning sleeve; 4104, conveying channel; 4105, guide groove; 3021, sink groove; 3022, boss; 3023, air channel. DETAILED DESCRIPTION

[0023] ​​The technical solutions in the present application will be described clearly and completely in combination with the specific embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] As shown in the drawings, Figures 1-10 A bushing press-fitting equipment of the present application comprises a rack 1 and a workpiece positioning tool 2. The press-fitting mechanism 3, the bushing conveying mechanism 4 and the transfer mechanism 5 are sequentially fixed on the rack 1 in the vertical direction from top to bottom, and the rear end of the bushing conveying mechanism 4 is connected with a vibrating disc 6 for storing and outputting bushings.

[0025] The workpiece positioning tool 2 is arranged directly below the press-fitting mechanism 3 and is fixedly connected with the rack 1, for vertically fixing the main bearing cover so that the prefabricated hole at the top of the main bearing cover faces upward. The press-fitting mechanism 3 has a first press-fitting end 301 and a second press-fitting end 302. When the first press-fitting end 301 goes down, it cooperates with the bushing conveying mechanism 4 to transfer the bushings one by one to the transfer mechanism 5, and the transfer mechanism 5 transfers the bushings and coaxially sleeves them to the end of the second press-fitting end 302 in the vertical direction. Then, when the second press-fitting end 302 goes down, it vertically presses the bushing at the end into the prefabricated hole of the main bearing cover.

[0026] Through the cooperation of the above-mentioned mechanisms, the coaxiality between the bushing and the prefabricated hole is ensured, and the deviation or deformation during the press-fitting process is avoided, thereby improving the assembly precision and consistency. At the same time, the automation degree of the equipment is improved, the degree of human participation and the labor intensity are reduced, the production efficiency is improved, and the requirements of modern engine manufacturing for high-precision and high-efficiency assembly process are met.

[0027] In the present structure, the vibrating disc 6 is used to orderly convey the bushings to the bushing conveying mechanism 4, which can adopt any one of the bushing feeding mechanisms in the prior art, such as the bushing feeding mechanism disclosed in a full-automatic workpiece bushing and pin press-in device (authorized publication number CN112091600B). In use, the discharge port of the vibrating disc 6 is connected with the rear end of the bushing conveying mechanism 4. When the vibrating disc 6 works, the bushings enter the bushing conveying mechanism 4 one by one from the discharge port, realizing automatic feeding.

[0028] In the above-mentioned bushing press-fitting equipment, the workpiece positioning tool 2 comprises an electric sliding table 21 and a mold 22. The electric sliding table 21 is fixedly arranged on the rack 1 in the left-right direction, and the mold 22 is fixed on the sliding block 211 of the electric sliding table 21, and the top of the mold 22 is provided with a mounting groove 2201 for positioning with the bottom of the main bearing cover. The main bearing cover can be manually installed on the mold 22, and after the press-fitting is completed, it can be manually disassembled, or it can be automatically installed and disassembled through an industrial robot, thereby improving the automation level and application range of the equipment.

[0029] In the structure, the shape of the mounting groove 2201 is matched with the bottom of the main bearing cover, and the bottom of the main bearing cover is inserted into the mounting groove 2201 during installation, and the positioning is realized by the plug-in mode, and the positioning accuracy is high. The electric sliding table 21 is used to drive the tire mold 22 to move in the left-right direction, facilitating the dismounting operation of the main bearing cover, and the control principle can be known in the prior art.

[0030] Further, the positioning pin structure is fixed on the groove bottom of the mounting groove 2201, and the positioning pin structure is matched with the original shaft hole of the bottom of the main bearing cover. After the main bearing cover is installed, the positioning pin structure is plugged into the shaft hole at the bottom thereof, and the plug-in positioning of the mounting groove 2201 is cooperated to form a double positioning structure, which further improves the positioning accuracy of the main bearing cover and ensures that the main bearing cover will not be deviated or inclined during the pressing process, thereby improving the coaxiality of the bushing pressing and the assembly quality.

[0031] Further, the tire mold 22 is provided with an electromagnet structure at the bottom thereof, and the main bearing cover is attracted by magnetic force, so that the main bearing cover is more stable after installation, and displacement caused by vibration or impact during the pressing process is effectively prevented, thereby further improving the stability of the pressing process and the assembly quality.

[0032] In the above-mentioned bushing pressing equipment, the bushing conveying mechanism 4 includes a support seat 41 and a translation cylinder 42, the transfer mechanism 5 includes a translation module 51 and a third lifting module 52, and the pressing mechanism 3 includes a first lifting module 31 and a second lifting module 32. The support seat 41, the translation module 51, the first lifting module 31 and the second lifting module 32 are all fixed on the rack 1. The second lifting module 32 drives the second pressing end 302 to lift and perform the bushing pressing action to press the bushing into the prefabricated hole at the top of the main bearing cover.

[0033] In the structure, the support seat 41 is provided with a sliding groove 4101 at the top thereof, the sliding groove 4101 is provided with a bushing output hole 4103 at one side of the bottom thereof and a bushing input port 4102 at the rear end of the other side, which is communicated with the discharge port of the vibration disc 6. The translation plate 43 is slidably arranged in the sliding groove 4101, the surfaces on the front and rear sides of the translation plate 43 are abutted with the corresponding groove surfaces of the sliding groove 4101, one end of the translation plate 43 penetrates through the side end of the support seat 41 and is hinged with the output end of the translation cylinder 42, and the rear end of the other end is provided with a transfer groove 4301. When the translation cylinder 42 works, the output end drives the translation plate 43 to translate left and right, so that the transfer groove 4301 is aligned with the bushing input port 4102 front and back, or aligned with the bushing output hole 4103 up and down.

[0034] In the initial state, the transfer groove 4301 is located directly above the bushing output hole 4103, and the bushing in the bushing input port 4102 of the vibration disc 6 is blocked by the rear end of the translation plate 43 and stays in place. When the translation cylinder 42 drives the translation plate 43 to translate, the transfer groove 4301 moves to the front of the bushing input port 4102, at which time the bushing is transported forward by the vibration disc 6, so that the bushing in the bushing input port 4102 enters the transfer groove 4301. Subsequently, the translation cylinder 42 drives the translation plate 43 to translate in the opposite direction, so that the bushing reaches directly above the bushing output hole 4103, completing the first transfer of the bushing. After the transfer, the mechanisms are returned to the original position, ready for the next transfer operation.

[0035] In this structure, the third lifting module 52 is fixed to the output end of the translation module 51, and a positioning sleeve 521 is fixed to the output end of the third lifting module 52. The translation module 51 drives the third lifting module 52 to translate forward and backward, so that the barrel mouth of the positioning sleeve 521 is aligned with the bushing output hole 4103 or the second pressing end 302. The first lifting module 31 is arranged directly above the bushing output hole 4103, and is used to drive the first pressing end 301 to move downward, so that the lower end of the bushing is pushed into the positioning sleeve 521.

[0036] In the transfer state, the translation module 51 drives the third lifting module 52 to translate backward, so that the barrel mouth of the positioning sleeve 521 is aligned with the bushing output hole 4103. Then, the first lifting module 31 drives the first pressing end 301 to move downward, so that the lower end of the bushing is pushed into the positioning sleeve 521, realizing the second transfer of the bushing. In the process, the first pressing end 301 passes through the transfer groove 4301 and the bushing output hole 4103 downward, ensuring that the bushing is well positioned. Subsequently, the first pressing end 301 moves upward to return to the original position, the translation module 51 drives the third lifting module 52 to translate forward, so that the barrel mouth of the positioning sleeve 521 is aligned with the second pressing end 302, completing the third transfer of the bushing.

[0037] When the bushing reaches directly below the second pressing end 302, the third lifting module 52 drives the positioning sleeve 521 to move upward, so that the positioning sleeve 521 is close to the second pressing end 302, until the upper end of the bushing is sleeved on the second pressing end 302, completing the fourth transfer of the bushing.

[0038] After the transfer, the positioning sleeve 521 is returned to the position directly below the bushing output hole 4103 through the cooperation of the third lifting module 52 and the translation module 51. Subsequently, the second lifting module 32 drives the second pressing end 302 to move downward, so that the bushing is pressed into the prefabricated hole at the top of the main bearing cover, completing the pressing of the bushing. After the pressing, the second pressing end 302 moves upward to return to the original position.

[0039] Through the cooperation of the above-mentioned mechanisms, the gradual transfer and precise pressing of the bushing from the vibration disc 6 to the final pressing into the main bearing cover is realized. The mechanism modules work together, the structure is compact, the action is smooth, and the high-precision operation is ensured, which improves the equipment operation efficiency and stability. Combined with industrial robots for automatic feeding and discharging, the whole process can be fully automated.

[0040] In the above-mentioned bushing pressing equipment, the translation module 51 and the third lifting module 52 are pneumatic linear modules, the first lifting module 31 is a linear cylinder, and the second lifting module 32 is an electric cylinder. The combination of the driving structure fully utilizes the advantages of fast response, compact structure of pneumatic elements and high control precision of electric cylinders, and is flexible in control, suitable for different pressing action requirements, and improves the overall automation level and operation efficiency of the equipment.

[0041] The translation module 51 includes a sliding rail, a sliding block, a flat push cylinder, and a carrier plate. The sliding rail and the flat push cylinder are fixed to the rack 1, the sliding block is slidingly fitted to the top of the sliding rail, the carrier plate is fixed to the top of the sliding block, and the carrier plate is driven by the flat push cylinder to move linearly in the front-back direction.

[0042] The third lifting module 52 includes a jacking cylinder and a base, the jacking cylinder is fixed to the front end of the carrier plate, the base is fixed to the top end of the output end of the jacking cylinder, and the positioning sleeve 521 is fixed to the top of the base. The base is driven by the jacking cylinder to rise and fall, and in turn drives the positioning sleeve 521 to move up and down, realizing the lifting and transfer action of the bushing. At the same time, the carrier plate is driven by the flat push cylinder to move forward and backward, driving the positioning sleeve 521 to move synchronously, realizing the position switching of the positioning sleeve 521.

[0043] Through the cooperation of the above-mentioned translation module 51 and the third lifting module 52, the positioning sleeve 521 can be accurately moved in the front-back direction and the vertical direction, thereby completing the accurate transfer of the bushing from the bushing output hole 4103 to the second pressing end 302.

[0044] In the above-mentioned bushing pressing equipment, the first pressing end 301 is a cylindrical structure, the transfer groove 4301 is a U-shaped structure, and the bushing output hole 4103 and the positioning sleeve 521 are circular structures. Specifically, the outer diameter of the first pressing end 301 is greater than the outer diameter of the bushing and smaller than the groove width of the transfer groove 4301. The groove width of the transfer groove 4301, the width of the bushing input port 4102, the inner diameter of the bushing output hole 4103, and the inner diameter of the positioning sleeve 521 are equal. The inner surfaces of the transfer groove 4301, the bushing input port 4102, the bushing output hole 4103, and the positioning sleeve 521 are coated with a friction-reducing coating, such as a PTFE coating or a ceramic coating.

[0045] Through the structure, the bushing is uniformly stressed and smoothly slides during transmission, effectively reducing friction resistance and preventing surface damage of the bushing. Meanwhile, the size matching design ensures the stability and centring of the bushing during transmission and press fitting, further improving the assembly quality.

[0046] Further, the rear end of the bushing input port 4102 extends rearward to form a groove-shaped conveying channel 4104, wherein the rear end of the conveying channel 4104 is horizontally aligned with the discharge port of the vibrating disc 6. The height of the rear end of the conveying channel 4104 is greater than that of the front end, and the groove width gradually increases from front to back by 2-6 mm to prevent excessive fitting clearance. The inner surface of the conveying channel 4104 is also coated with the above-mentioned friction-reducing coating, and the outer bottom is fixed with a vibration motor. This structure effectively improves the smoothness and stability of the bushing during conveying, prevents jamming or accumulation, and provides protection for the smooth performance of subsequent press fitting actions in combination with the vibrating disc 6.

[0047] Further, a limiting plate 44 is fixed to one side of the top of the conveying channel 4104, wherein the distance between the bottom of the limiting plate 44 and the groove bottom of the conveying channel 4104 is greater than the axial length of the bushing. The limiting plate 44 prevents the bushing from jumping out of the channel during conveying due to vibration, further improves the stability of the conveying process, prevents misalignment of the bushing, and improves the conveying efficiency.

[0048] In the above-mentioned bushing press fitting equipment, the top of the support seat 41 is provided with a guide groove 4105, and the bottom of the translation plate 43 is fixed with a positioning protrusion 431, wherein the bottom of the positioning protrusion 431 is slidingly arranged in the guide groove 4105 in the left-right direction, and the side is hinged to the output end of the translation cylinder 42. Through this structure, the motion trajectory of the translation plate 43 is accurately guided, ensuring the accurate alignment between the transfer groove 4301 and the bushing input port 4102 and the bushing output hole 4103, and providing reliable protection for the stable transmission and accurate positioning of the bushing during conveying.

[0049] In the above-mentioned bushing press fitting equipment, the second press fitting end 302 is a columnar structure, the bottom end of which is provided with a sink groove 3021, the inner diameter of which is equal to the outer diameter of the bushing, and the inner wall of which is also coated with the above-mentioned friction-reducing coating. The sink groove 3021 is provided with a boss 3022 on the groove bottom, and the outer diameter of the boss 3022 is less than or equal to the inner diameter of the bushing. The side of the boss 3022 is provided with a spring plunger 34, and the ball head end of the spring plunger 34 is used to elastically abut the inner side surface of the bushing. The side of the second press fitting end 302 is provided with an air channel 3023, one end of which is screwed with an air line joint 35, and the other end is in communication with the sink groove 3021.

[0050] The third lifting module 52 drives the positioning sleeve 521 to move upward to approach the second pressing end 302, and inserts the upper end of the bushing into the sink groove 3021. At this time, the ball head end of the spring plunger 34 elastically abuts against the inner wall of the bushing, so as to realize clamping and accurate positioning of the bushing. After the pressing is completed, there is no bushing in the sink groove 3021. At this time, the air channel 3023 blows air into the sink groove 3021, so as to realize cleaning of the inside of the sink groove 3021, and prevent residual impurities from affecting the subsequent pressing precision. Through the clamping, positioning and cleaning functions, the positioning precision and stability of the bushing pressing are improved, and the assembly quality is further ensured.

[0051] It should be pointed out that the control technology of the driving elements such as the air cylinder and the electric cylinder involved in the present application is the prior art, and the specific control method and implementation means have been widely applied and described in detail in the related field, and will not be repeated here. The core of the present application is to provide an innovative mechanical structure and its combination mode to realize an efficient and accurate bushing pressing process.

[0052] The use method of the bushing pressing equipment of the present application is as follows: Firstly, the main bearing cover is installed on the workpiece positioning tool 2 to complete positioning and fixation. At the same time, the bushing to be pressed is placed in the vibration disc 6, and the vibration disc 6 intermittently feeds the bushing to the bushing conveying mechanism 4 in sequence. Then, the first pressing end 301 is driven downward by the first lifting module 31, cooperates with the bushing conveying mechanism 4, and transfers the bushing to the transfer mechanism 5 one by one. The transfer mechanism 5 transfers the bushing in the vertical direction, and coaxially sleeves the end of the second pressing end 302, and returns after the transfer. Then, the second pressing end 302 is driven downward by the second lifting module 32, and vertically presses the bushing into the prefabricated hole at the top of the main bearing cover, to complete the automatic pressing work of the bushing.

[0053] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bushing press-fitting device, characterized in that: It comprises a machine frame (1) and a workpiece positioning fixture (2), wherein: A pressing mechanism (3), a bushing conveying mechanism (4) and a transfer mechanism (5) are fixed vertically in sequence from top to bottom on the frame (1); a vibration plate (6) for storing bushings is connected to the rear end of the bushing conveying mechanism (4); The workpiece positioning fixture (2) is located directly below the press-fitting mechanism (3) and is fixedly connected to the frame (1) and is used to vertically fix the main bearing cap so that the prefabricated hole on the top of the main bearing cap faces upward; The press-fitting mechanism (3) has a first press-fitting end (301) and a second press-fitting end (302). When the first press-fitting end (301) moves downward, it cooperates with the bushing conveying mechanism (4) to transfer the bushings one by one to the transfer mechanism (5). The transfer mechanism (5) transfers the bushings and sleeves them vertically and coaxially to the end of the second press-fitting end (302). When the second press-fitting end (302) moves downward, the bushing at its end is vertically pressed into the prefabricated hole of the main bearing cap.

2. A bushing press-fitting device according to claim 1, characterized in that: The workpiece positioning fixture (2) comprises an electric slide (21) and a mold (22), wherein: The electric slide (21) is fixedly arranged on the frame (1) along the left-right direction; The tire mold (22) is fixed on the slider (211) of the electric slide (21), and a mounting groove (2201) is provided on the top thereof for plugging and positioning with the bottom of the main bearing cover.

3. The bushing press-fitting device according to claim 2, characterized in that: A positioning pin structure is fixed on the bottom of the installation groove (2201).

4. The bushing press-fitting device according to claim 1, characterized in that: The bushing conveying mechanism (4) includes a support seat (41) and a translation cylinder (42), the transfer mechanism (5) includes a translation module (51) and a third lifting module (52), and the pressing mechanism (3) includes a first lifting module (31) and a second lifting module (32), wherein: The support seat (41), the translation module (51), the first lifting module (31) and the second lifting module (32) are all fixed on the frame (1), and the second lifting module (32) drives the second pressing end (302) to move up and down to perform the bushing pressing action; The support seat (41) has a chute (4101) on the top, a bushing output hole (4103) on one side of the bottom of the chute (4101), and a bushing input port (4102) connected to the discharge port of the vibration plate (6) at the rear end of the other side; A translation plate (43) is slidably provided in the slide groove (4101), one end of the translation plate (43) passes through the side end of the support seat (41) and is hinged to the output end of the translation cylinder (42), and a transfer groove (4301) is provided on the rear end of the other end. The translation cylinder (42) drives the translation plate (43) to translate left and right, so that the transfer groove (4301) is aligned with the bushing input port (4102) front and back, or aligned with the bushing output hole (4103) top and bottom; The third lifting module (52) is fixed to the output end of the translation module (51), and a positioning sleeve (521) is fixed to the output end of the third lifting module (52). The translation module (51) drives the third lifting module (52) to translate forward and backward, so that the tube mouth of the positioning sleeve (521) is aligned with the bushing output hole (4103) or the second press-fitting end (302) in the vertical direction; The first lifting module (31) is arranged directly above the bushing output hole (4103) and is used to drive the first pressing end (301) downward to push the lower end of the bushing into the positioning sleeve (521); The third lifting module (52) drives the positioning sleeve (521) to move up and down, so that the positioning sleeve (521) approaches or moves away from the second press-fitting end (302).

5. The bushing press-fitting device according to claim 4, characterized in that: The first press-fitting end (301) is a cylindrical structure, the transfer groove (4301) is a U-shaped structure, the bushing output hole (4103) and the positioning sleeve (521) are circular structures, wherein: The outer diameter of the first press-fit end (301) is larger than the outer diameter of the bushing and smaller than the width of the transfer groove (4301); The slot width of the transfer slot (4301), the width of the bushing input port (4102), the inner diameter of the bushing output hole (4103), and the inner diameter of the positioning sleeve (521) are equal; The inner surface of the transfer groove (4301), the inner surface of the bushing input port (4102), the inner surface of the bushing output hole (4103), and the inner surface of the positioning sleeve (521) are all coated with a friction-reducing coating.

6. The bushing press-fitting device according to claim 4, characterized in that: The rear end of the bushing input port (4102) extends backward to form a groove-shaped conveying channel (4104), wherein: The rear end of the conveying channel (4104) is horizontally aligned with the discharge port of the vibration plate (6); The height of the rear end of the conveying channel (4104) is greater than that of the front end, and the width of the channel gradually increases from front to back; The inner surface of the conveying channel (4104) is coated with a friction-reducing coating, and a vibration motor is fixed to the outer bottom thereof.

7. The bushing press-fitting device according to claim 6, characterized in that: A limiting plate (44) is fixed on one side of the top of the conveying channel (4104), wherein: The distance between the bottom of the limiting plate (44) and the groove bottom of the conveying channel (4104) is greater than the axial length of the bushing.

8. The bushing press-fitting device according to claim 4, characterized in that: The top of the support seat (41) is provided with a guide groove (4105), and the bottom of the translation plate (43) is fixed with a positioning protrusion (431), wherein: The bottom of the positioning protrusion (431) is slidably arranged in the guide groove (4105) along the left-right direction, and the side is hinged to the output end of the translation cylinder (42).

9. The bushing press-fitting device according to claim 4, characterized in that: The translation module (51) and the third lifting module (52) are configured as pneumatic linear modules, the first lifting module (31) is configured as a linear cylinder, and the second lifting module (32) is configured as an electric cylinder.

10. The bushing press-fitting device according to claim 1, characterized in that: The second press-fitting end (302) is a columnar structure, wherein: A sink (3021) is provided at the bottom end of the second press-fit end (302), the inner diameter of the sink (3021) being equal to the outer diameter of the bushing, and the inner wall of the sink is coated with a friction-reducing coating; A boss (3022) is provided on the bottom of the sink (3021), and the outer diameter of the boss (3022) is smaller than or equal to the inner diameter of the bushing; A spring plunger (34) is provided on the side of the boss (3022), and the ball end of the spring plunger (34) is used to elastically support the inner surface of the bushing; An air channel (3023) is provided on the side of the second press-fit end (302), one end of the air channel (3023) is threadedly connected to an air line connector (35), and the other end is communicated with the sink (3021).

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