A bushing pressing device

Abstract

This utility model relates to the field of engine manufacturing technology, and in particular to a bushing pressing device, including a frame and a workpiece positioning fixture. The frame is vertically fixed from top to bottom with a pressing mechanism, a bushing conveying mechanism, and a transfer mechanism. The workpiece positioning fixture is located directly below the pressing mechanism and is fixedly connected to the frame, used to vertically fix the main bearing cap so that the pre-drilled hole at the top of the main bearing cap faces upwards. When the first pressing end moves downwards, 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 coaxially fits them vertically to the end of the second pressing end. When the second pressing end moves downwards, it vertically presses the bushing at its end into the pre-drilled hole of the main bearing cap. Through the coordinated operation of multiple mechanisms, the bushing is coaxially fitted onto the end of the second pressing end of the pressing mechanism, and during the downward movement of the second pressing end, the bushing is vertically pressed into the pre-drilled hole of the main bearing cap.

Description

Technical Field

[0001] This utility model relates to the field of engine manufacturing technology, and in particular to a bushing pressing device. Background Technology

[0002] In the automotive engine manufacturing industry, the main bearing cap is a key component, its function being 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 cap directly affects the overall performance and lifespan of the engine; therefore, the assembly requirements for the main bearing cap and its related components (such as bushings) during the production process are extremely high.

[0003] Currently, the press-fitting of main bearing cap bushings is mostly done manually. The process involves first manually installing the main bearing cap onto the tooling of a hydraulic press and pre-placing the bushing in a pre-drilled hole in the main bearing cap. Then, by controlling the extension of the hydraulic cylinder of the hydraulic press, the bushing is pressed into the pre-drilled hole.

[0004] However, this traditional press-fitting method has significant drawbacks. On the one hand, due to the lack of precise positioning devices, it is difficult to ensure the coaxiality between the bushing and the pre-drilled hole in the main bearing cap manually, leading to problems such as bushing misalignment and deformation during the press-fitting process, thus affecting assembly quality. On the other hand, the entire process relies heavily on manual operation, has a low degree of automation, is cumbersome, and has low production efficiency, making it difficult to meet the demands of the modern automotive manufacturing industry for high-efficiency and high-consistency production. Utility Model Content

[0005] In view of this, this utility model proposes a bushing pressing device, which, through the coordinated operation of multiple mechanisms, coaxially fits the bushing onto the end of the second pressing end of the pressing mechanism, and vertically presses the bushing into the pre-drilled hole of the main bearing cap during the downward movement of the second pressing end. This structure effectively ensures the coaxiality between the bushing and the pre-drilled hole, avoids misalignment or deformation during pressing, and improves assembly accuracy and consistency. At the same time, the equipment has a high degree of automation, reducing manual intervention and labor intensity, improving production efficiency, meeting the requirements of modern engine manufacturing for high-precision and high-efficiency assembly processes, and solving the problems of low pressing efficiency and poor assembly accuracy caused by manual operation in existing technologies.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a bushing pressing device, including a frame and a workpiece positioning fixture, wherein... The frame is vertically fixed from top to bottom with a pressing mechanism, a bushing conveying mechanism and a transfer mechanism. The rear end of the bushing conveying mechanism is connected to a vibratory plate for storing bushings. The workpiece positioning fixture is located directly below the pressing mechanism and is fixedly connected to the frame. It is used to vertically fix the main bearing cover so that the pre-made hole on the top of the main bearing cover faces upward. The pressing mechanism has a first pressing end and a second pressing end. When the first pressing 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 fits them coaxially along the vertical axis to the end of the second pressing end. When the second press-fit end moves downward, its end bushing is pressed vertically into the pre-made hole of the main bearing cover.

[0007] Based on the above technical solutions, preferably, the workpiece positioning fixture includes an electric slide table and a mold, wherein... The electric slide is fixedly mounted on the frame in the left-right direction; The mold is fixed on the slider of the electric slide table, and its top is provided with a mounting groove for insertion and positioning with the bottom of the main bearing cover.

[0008] Based on the above technical solutions, preferably, a positioning pin structure is fixed on the bottom of the mounting groove.

[0009] Based on the above technical solutions, preferably, the bushing conveying mechanism includes a support base and a translation cylinder, the conveying 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 base, 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 pressing end to rise and fall to perform the bushing pressing action; The support base is provided with a sliding groove at the top, and a bushing output hole is provided on one side of the bottom of the sliding groove, and a bushing input port connected to the discharge port of the vibratory plate is provided at the rear end of the other side. A translation plate is slidably arranged in the chute. One end of the translation plate passes through the side end of the support base and is hinged to the output end of the translation cylinder. 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 vertically. 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 opening of the positioning sleeve is aligned vertically with the bushing output hole or the second pressing end. The first lifting module is located directly above the bushing output hole and is used to drive the first pressing 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 closer to or further away from the second pressing end.

[0010] Based on the above technical solutions, preferably, the first pressing end has a cylindrical structure, the transfer groove has a U-shaped structure, and the bushing output hole and the positioning sleeve have circular structures. The outer diameter of the first press-fit end is larger than the outer diameter of the bushing and smaller than the width of the transfer groove; The width of the transfer trough, the width of the bushing inlet, the inner diameter of the bushing outlet, and the inner diameter of the positioning sleeve are equal. The inner surface of the transfer trough, the inner surface of the bushing inlet, the inner surface of the bushing outlet, and the inner surface of the positioning sleeve are all coated with a friction-reducing coating.

[0011] Based on the above technical solutions, preferably, the rear end of the bushing inlet extends rearward to form a groove-shaped conveying channel, wherein, The rear end of the conveying channel is horizontally aligned with the discharge port of the vibratory feeder; The rear end of the conveying channel is higher than the front end, and its width gradually increases from front to back. The inner surface of the conveying channel is coated with a friction-reducing coating, and a vibration motor is fixed to its outer bottom.

[0012] Based on the above technical solutions, preferably, a limit 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 bottom of the conveying channel is greater than the axial length of the bushing.

[0013] Based on the above technical solutions, preferably, the top of the support base is provided with a guide groove, and the bottom of the translation plate is fixed with a positioning protrusion, wherein... The bottom of the positioning protrusion is slidably disposed in the guide groove in the left-right direction, and its side is hinged to the output end of the translation cylinder.

[0014] Based on the above technical solutions, preferably, the translation module and the third lifting module are pneumatic linear modules, the first lifting module is a linear cylinder, and the second lifting module is an electric cylinder.

[0015] Based on the above technical solutions, preferably, the second press-fit end has a columnar structure, wherein... The second press-fit end is provided with a recessed groove at its bottom end. The inner diameter of the recessed groove is equal to the outer diameter of the bushing, and its inner wall is coated with a friction-reducing coating. The bottom of the settling tank is provided with a boss, the outer diameter of which is less than or equal to the inner diameter of the bushing. The boss is provided with a spring plunger on its side, and the ball end of the spring plunger is used to elastically abut against the inner surface of the bushing. The second pressing end is provided with an air passage on its side. One end of the air passage is screwed with an air line connector, and the other end is connected to the settling tank.

[0016] The bushing pressing equipment of this utility model has the following advantages over the prior art: (1) By setting up workpiece positioning fixtures, pressing mechanisms, bushing conveying mechanisms, and transfer mechanisms on the frame, the bushing can be coaxially fitted onto the end of the second pressing end of the pressing mechanism through the coordinated operation of multiple mechanisms. During the downward movement of the second pressing end, the bushing is vertically pressed into the pre-drilled hole of the main bearing cap. This structure effectively ensures the coaxiality between the bushing and the pre-drilled hole, avoids offset or deformation during the pressing process, and improves assembly accuracy and consistency. At the same time, the equipment has a high degree of automation, reduces manual intervention and labor intensity, improves production efficiency, and meets the requirements of modern engine manufacturing for high-precision and high-efficiency assembly processes.

[0017] (2) By setting up a bushing conveying mechanism consisting of a support base and a translation cylinder, and a transfer mechanism consisting 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 bushing is transferred step by step and pressed precisely. The modules work together, with a compact structure and smooth operation, ensuring high precision throughout the entire process from the output of the vibratory feeder to the final pressing into the main bearing cover, thus improving the equipment's operating efficiency and stability.

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

[0019] (4) By setting a trough-shaped conveying channel at the rear end of the bushing inlet, and gradually increasing the width and height of the trough from front to back, combined with the anti-friction coating and vibrating motor, the smoothness and stability of the bushing during the conveying process are effectively improved, preventing jamming or accumulation. Combined with a vibrating plate, it helps to improve the efficiency and reliability of automatic bushing conveying, and provides a guarantee for the smooth progress of subsequent pressing operations.

[0020] (5) By setting a groove, a boss, a spring plunger and an air passage structure at the bottom of the second press-fit end, the functions of clamping, positioning and cleaning of the bushing are realized. Among them, the groove matches the outer diameter of the bushing, the boss cooperates with the spring plunger to achieve elastic clamping, and the air passage can be used for cleaning or auxiliary clamping. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of a bushing pressing device according to the present invention; Figure 2 This is a perspective view of a bushing pressing device according to the present invention. Figure 3 for Figure 1 A partial stereoscopic view from another perspective; Figure 4 A 3D view of the tooling location for the workpiece; Figure 5 This is a three-dimensional view of the pressing mechanism. Figure 6 for Figure 5 Enlarged view of point A; Figure 7 A three-dimensional view of the bushing conveying mechanism; Figure 8 A three-dimensional view of the transfer mechanism; Figure 9 This is a perspective view of the second press-fit end portion; Figure 10 This is a three-dimensional view of the first press-fit end portion; In the diagram: 1. Frame; 2. Workpiece positioning fixture; 3. Pressing mechanism; 4. Bushing conveying mechanism; 5. Transfer mechanism; 6. Vibratory feeder; 21. Electric slide table; 22. Die mold; 31. First lifting module; 32. Second lifting module; 34. Spring plunger; 35. Air line connector; 41. Support base; 42. Translation cylinder; 43. Translation plate; 44. Limit plate; 51. Translation module; 52. Third lifting module. Lowering module; 211, slider; 301, first pressing end; 302, second pressing 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, settling groove; 3022, boss; 3023, air passage. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1-10 As shown, a bushing pressing device of this utility model includes a frame 1 and a workpiece positioning fixture 2. A pressing mechanism 3, a bushing conveying mechanism 4 and a transfer mechanism 5 are fixed vertically from top to bottom on the frame 1. The rear end of the bushing conveying mechanism 4 is connected to a vibratory feeder 6 for storing and outputting bushings.

[0025] The workpiece positioning fixture 2 is located directly below the pressing mechanism 3 and is fixedly connected to the frame 1. It is used to vertically fix the main bearing cover so that the pre-drilled hole at the top of the main bearing cover faces upward. The pressing mechanism 3 has a first pressing end 301 and a second pressing end 302. When the first pressing 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 fits them vertically and coaxially to the end of the second pressing end 302. Subsequently, when the second pressing end 302 moves downward, it vertically presses the bushing at its end into the pre-drilled hole of the main bearing cover.

[0026] Through the coordinated operation of the aforementioned mechanisms, the coaxiality between the bushing and the pre-drilled hole is ensured, preventing misalignment or deformation during press-fitting and improving assembly accuracy and consistency. Simultaneously, the automation level of the equipment is enhanced, reducing manual intervention and labor intensity, increasing production efficiency, and meeting the requirements of modern engine manufacturing for high-precision, high-efficiency assembly processes.

[0027] In this structure, the vibratory feeder 6 is used to orderly feed the bushings to the bushing conveying mechanism 4. It can employ any bushing feeding mechanism from the prior art, such as the bushing feeding mechanism disclosed in a fully automatic workpiece bushing and pin pressing device (authorization announcement number CN112091600B). In use, the outlet of the vibratory feeder 6 is connected to the rear end of the bushing conveying mechanism 4. When the vibratory feeder 6 is working, the bushings sequentially enter the bushing conveying mechanism 4 from the outlet, achieving automatic feeding.

[0028] In the aforementioned bushing pressing equipment, the workpiece positioning fixture 2 includes an electric slide table 21 and a mold 22. The electric slide table 21 is fixedly mounted on the frame 1 in the left-right direction, and the mold 22 is fixed on the slider 211 of the electric slide table 21. The mold 22 has a mounting groove 2201 on its top for insertion and positioning with the bottom of the main bearing cover. The main bearing cover can be manually installed onto the mold 22 and manually disassembled after pressing. Alternatively, it can be automatically installed and disassembled using an industrial robot, thus improving the automation level and applicability of the equipment.

[0029] In this structure, the shape of the mounting groove 2201 is adapted to the bottom shape of the main bearing cover. During installation, the bottom of the main bearing cover is inserted into the mounting groove 2201, and positioning is achieved through a plug-in method, resulting in high positioning accuracy. The electric slide 21 is used to drive the mold 22 to move in the left and right directions, facilitating the loading and unloading of the main bearing cover. Its control principle is known in the prior art.

[0030] Furthermore, a locating pin structure is fixed on the bottom of the mounting groove 2201, which is adapted to the original shaft hole at the bottom of the main bearing cover. After the main bearing cover is installed, the locating pin structure is inserted into its bottom shaft hole, and together with the insertion and positioning of the mounting groove 2201, a double positioning structure is formed, which further improves the positioning accuracy of the main bearing cover and ensures that it will not shift or tilt during the press-fitting process, thereby improving the coaxiality and assembly quality of the bushing press-fitting.

[0031] Furthermore, the mold 22 has an integrated electromagnet structure at its bottom, which magnetically attracts the main bearing cap, making it more stable after installation and effectively preventing displacement caused by vibration or impact during the pressing process, thereby further improving the stability and assembly quality of the pressing process.

[0032] In the aforementioned bushing pressing equipment, the bushing conveying mechanism 4 includes a support base 41 and a translation cylinder 42, the conveying 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 base 41, translation module 51, first lifting module 31, and second lifting module 32 are all fixed to the frame 1. The second lifting module 32 drives the second pressing end 302 to rise and fall, performing the bushing pressing action and pressing the bushing into the pre-drilled hole at the top of the main bearing cap.

[0033] In this structure, the top of the support base 41 is provided with a sliding groove 4101, and one side of the bottom of the sliding groove 4101 is provided with a bushing output hole 4103, while the rear end of the other side is provided with a bushing input hole 4102 that communicates with the discharge port of the vibrating plate 6. A translation plate 43 is slidably arranged in the sliding groove 4101. The front and rear surfaces of the translation plate 43 abut against the corresponding groove surfaces of the sliding groove 4101, and one end of the translation plate 43 passes through the side end of the support base 41 and is hinged to the output end of the translation cylinder 42. The rear end of the other end is provided with a transfer groove 4301. When the translation cylinder 42 is working, its output end drives the translation plate 43 to translate left and right, so that the transfer groove 4301 is aligned front and back with the bushing input hole 4102, or vertically aligned with the bushing output hole 4103.

[0034] Initially, the transfer trough 4301 is located directly above the bushing output hole 4103, and the bushing in the bushing input port 4102 of the vibratory feeder 6 is blocked by the rear end of the translation plate 43 and remains in place. When the translation cylinder 42 drives the translation plate 43 to translate, the transfer trough 4301 moves to the front of the bushing input port 4102. At this time, the bushing is conveyed forward by the vibratory feeder 6, so that the bushing in the bushing input port 4102 enters the transfer trough 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, all mechanisms return to their original positions, ready for the next transfer action.

[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 move back and forth, so that the opening of the positioning sleeve 521 is aligned vertically with the bushing output hole 4103 or the second pressing end 302. The first lifting module 31 is located 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.

[0036] In the transfer state, the translation module 51 drives the third lifting module 52 to move backward, aligning the opening of the positioning sleeve 521 with the bushing output hole 4103. Then, the first lifting module 31 drives the first pressing end 301 downward, pushing the lower end of the bushing into the positioning sleeve 521, realizing the second transfer of the bushing. During this process, the first pressing end 301 passes downward through the transfer groove 4301 and the bushing output hole 4103 to ensure the bushing is properly positioned. Subsequently, the first pressing end 301 moves upward back to its original position, and the translation module 51 drives the third lifting module 52 to move forward, aligning the opening of the positioning sleeve 521 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 approaches the second pressing end 302, until the upper end of the bushing is fitted onto the second pressing end 302, completing the fourth transfer of the bushing.

[0038] After transfer, the positioning sleeve 521 returns to its original position directly below the bushing output hole 4103 through the coordinated operation of the third lifting module 52 and the translation module 51. Subsequently, the second lifting module 32 drives the second pressing end 302 downward to press the bushing into the pre-drilled hole on the top of the main bearing cover, completing the bushing pressing. After pressing, the second pressing end 302 moves upward back to its original position.

[0039] Through the coordinated operation of the aforementioned mechanisms, the bushing is transferred and precisely pressed into the main bearing cap in a step-by-step manner, from the output of the vibratory feeder 6 to its final insertion. The collaborative work of each mechanism module, with its compact structure and smooth operation, ensures high-precision operation and improves equipment efficiency and stability. Combined with industrial robots for automatic loading and unloading, the entire process can be fully automated.

[0040] In the aforementioned 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. This drive structure combination fully leverages the advantages of pneumatic components—fast response and compact structure—and the advantages of electric cylinders—high control precision. It offers flexible control, adapts to different pressing action requirements, and improves the overall automation level and operating efficiency of the equipment.

[0041] The translation module 51 includes a slide rail, a sliding block, a horizontal push cylinder, and a carrying plate. The slide rail and the horizontal push cylinder are fixed to the frame 1, the sliding block is slidably engaged with the top of the slide rail, and the carrying plate is fixed to the top of the sliding block. The carrying plate is driven to move linearly in the front-back direction by the horizontal push cylinder.

[0042] The third lifting module 52 includes a lifting cylinder and a base. The lifting cylinder is fixed to the front end of the carrying plate, and the base is fixed to the top of the output end of the lifting cylinder. The positioning sleeve 521 is fixed to the top of the base. The lifting cylinder drives the base to rise and fall, which in turn drives the positioning sleeve 521 to move up and down, realizing the lifting and transferring action of the bushing. At the same time, the horizontal thrust cylinder drives the carrying plate to move back and forth, which drives the positioning sleeve 521 to move synchronously, realizing the switching of its front and rear positions.

[0043] By working together with the translation module 51 and the third lifting module 52, the positioning sleeve 521 can move precisely in the front-back direction and the vertical direction, thereby completing the precise transfer of the bushing from the bushing output hole 4103 to the second pressing end 302.

[0044] In the aforementioned bushing pressing equipment, the first pressing end 301 has a cylindrical structure, the transfer groove 4301 has a U-shaped structure, and the bushing output hole 4103 and the positioning sleeve 521 have circular structures. Specifically, the outer diameter of the first pressing end 301 is larger 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 all coated with a friction-reducing coating, such as a PTFE coating or a ceramic coating.

[0045] This structure ensures uniform force distribution and smooth sliding of the bushing during transmission, effectively reducing frictional resistance and preventing damage to the bushing surface. Simultaneously, the dimensional matching design guarantees the stability and alignment of the bushing during transmission and pressing, further improving assembly quality.

[0046] Furthermore, the rear end of the bushing inlet 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 vibratory feeder 6. The height of the rear end of the conveying channel 4104 is greater than the height of the front end, and its groove width gradually increases from front to back by an increase of 2-6 mm to prevent excessive clearance. The inner surface of the conveying channel 4104 is also coated with the aforementioned anti-friction coating, and a vibratory motor is fixed to its outer bottom. This structure effectively improves the smoothness and stability of the bushing during the conveying process, prevents jamming or accumulation, and, combined with the vibratory feeder 6, ensures the smooth progress of subsequent pressing operations.

[0047] Furthermore, 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 bottom of the groove of the conveying channel 4104 is greater than the axial length of the bushing. The limiting plate 44 prevents the bushing from detaching from the channel due to vibration and jumping during the conveying process, thereby further improving the stability of the conveying process, preventing bushing misalignment, and improving conveying efficiency.

[0048] In the aforementioned bushing pressing equipment, the support base 41 has a guide groove 4105 at its top, and the bottom of the translation plate 43 is fixed with a positioning protrusion 431. The bottom of the positioning protrusion 431 is slidably disposed in the guide groove 4105 in the left-right direction, and its side is hinged to the output end of the translation cylinder 42. This structure achieves precise guidance of the movement trajectory of the translation plate 43, ensuring accurate alignment between the transfer groove 4301 and the bushing input port 4102 and the bushing output hole 4103, providing a reliable guarantee for the stable transmission and precise positioning of the bushing during the conveying process.

[0049] In the aforementioned bushing pressing equipment, the second pressing end 302 has a columnar structure with a recess 3021 at its bottom. The inner diameter of the recess 3021 is equal to the outer diameter of the bushing, and its inner wall is also coated with the aforementioned anti-friction coating. A boss 3022 is provided on the bottom of the recess 3021, and the outer diameter of the boss 3022 is less 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 abut against the inner surface of the bushing. An air passage 3023 is provided on the side of the second pressing end 302, one end of which is screwed with an air line connector 35, and the other end is connected to the recess 3021.

[0050] The third lifting module 52 drives the positioning sleeve 521 upwards towards the second pressing end 302, inserting the upper end of the bushing into the recess 3021. At this time, the ball end of the spring plunger 34 elastically abuts against the inner wall of the bushing, achieving clamping and precise positioning of the bushing. After pressing, there is no bushing in the recess 3021. At this time, the air passage 3023 blows air into the recess 3021 to clean the inside of the recess 3021 and prevent residual impurities from affecting the subsequent pressing accuracy. Through the above clamping, positioning, and cleaning functions, the positioning accuracy and stability of bushing pressing are improved, further ensuring assembly quality.

[0051] It should be noted that the control technology of the cylinders, electric cylinders, and other drive components involved in this utility model is existing technology. The specific control methods and implementation means have been widely applied and described in detail in related fields, and will not be elaborated upon here. The core of this utility model lies in providing an innovative mechanical structure and its combination method to achieve an efficient and precise bushing pressing process.

[0052] The method of using the bushing pressing equipment of this utility model is as follows: First, the main bearing cap is installed on the workpiece positioning fixture 2 to complete its positioning and fixation. Simultaneously, the bushings to be pressed are placed in the vibratory feeder 6, which intermittently transports the bushings sequentially to the bushing conveying mechanism 4. Then, the first pressing end 301, driven by the first lifting module 31, moves downwards and, in cooperation with the bushing conveying mechanism 4, transfers the bushings one by one to the transfer mechanism 5. The transfer mechanism 5 moves the bushings vertically and coaxially fits them onto the end of the second pressing end 302, returning to its original position after transfer. Next, the second pressing end 302, driven by the second lifting module 32, moves downwards and vertically presses the bushings into the pre-drilled holes on the top of the main bearing cap, completing the automatic pressing operation of the bushings.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bushing press fitting apparatus characterized by: Includes a frame (1) and a workpiece positioning fixture (2), wherein, The frame (1) is vertically fixed from top to bottom with a pressing mechanism (3), a bushing conveying mechanism (4) and a transfer mechanism (5). The bushing conveying mechanism (4) is connected to a vibratory plate (6) for storing bushings at its rear end. The workpiece positioning fixture (2) is located directly below the pressing mechanism (3) and is fixedly connected to the frame (1) for vertically fixing the main bearing cover so that the pre-made hole at the top of the main bearing cover faces upward. The pressing mechanism (3) has a first pressing end (301) and a second pressing end (302). When the first pressing 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 fits them on the end of the second pressing end (302) along the vertical coaxial direction. When the second press-fit end (302) moves downward, the bushing at its end is pressed vertically into the pre-made hole of the main bearing cover.

2. A bush press apparatus as claimed in claim 1, characterised in that: The workpiece positioning fixture (2) includes an electric slide table (21) and a mold (22), wherein, The electric slide (21) is fixedly mounted on the frame (1) in the left-right direction; The mold (22) is fixed on the slider (211) of the electric slide (21), and its top is provided with a mounting groove (2201) for insertion and positioning with the bottom of the main bearing cover.

3. A bush press installation as claimed in claim 2, characterised in that: A positioning pin structure is fixed on the bottom of the mounting groove (2201).

4. A bush press apparatus as claimed in claim 1, characterised in that: The bushing conveying mechanism (4) includes a support base (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 base (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 lift and lower to perform the bushing pressing action; The support base (41) has a groove (4101) at the top, a bushing output hole (4103) on one side of the bottom of the groove (4101), and a bushing input port (4102) connected to the discharge port of the vibrating plate (6) at the rear end of the other side. A translation plate (43) is slidably disposed in the slide groove (4101). One end of the translation plate (43) passes through the side end of the support base (41) and is hinged to the output end of the translation cylinder (42). A transfer groove (4301) is provided on the rear end of the other end. The translation cylinder (42) drives the translation plate (43) to move 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) vertically. The third lifting module (52) is fixed on the output end of the translation module (51). A positioning sleeve (521) is fixed on the output end of the third lifting module (52). The translation module (51) drives the third lifting module (52) to translate back and forth, so that the opening of the positioning sleeve (521) is aligned vertically with the bushing output hole (4103) or the second pressing end (302). The first lifting module (31) is located 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) moves closer to or further away from the second pressing end (302).

5. A bush press apparatus as claimed in claim 4, wherein: The first press-fit 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. 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 width of the transfer groove (4301), the width of the bushing inlet (4102), the inner diameter of the bushing outlet (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 inlet (4102), the inner surface of the bushing outlet (4103), and the inner surface of the positioning sleeve (521) are all coated with a friction-reducing coating.

6. A bush press apparatus as claimed in claim 4, characterised in that: The bushing inlet (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 plate (6); The height of the rear end of the conveying channel (4104) is greater than the height of the front end, and its groove width 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 its outer bottom.

7. A bush press apparatus as claimed in claim 6, characterised in that: A limit 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 bottom of the conveying channel (4104) is greater than the axial length of the bushing.

8. A bush press apparatus as claimed in claim 4, characterised in that: The support base (41) is provided with a guide groove (4105) at its top, and the translation plate (43) is fixed with a positioning protrusion (431) at its bottom. The bottom of the positioning protrusion (431) is slidably disposed in the guide groove (4105) in the left-right direction, and the side is hinged to the output end of the translation cylinder (42).

9. A bushing press installation as defined in claim 4 wherein: 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.

10. The bushing pressing equipment as described in claim 1, characterized in that: The second press-fit end (302) has a columnar structure, wherein, The second press-fit end (302) has a recess (3021) at its bottom end. The inner diameter of the recess (3021) is equal to the outer diameter of the bushing, and its inner wall is coated with a friction-reducing coating. The bottom of the settling tank (3021) is provided with a boss (3022), the outer diameter of the boss (3022) being less than or equal to the inner diameter of the bushing; The boss (3022) is provided with a spring plunger (34) on its side, and the ball end of the spring plunger (34) is used to elastically abut against the inner surface of the bushing. The second press end (302) has an air passage (3023) on its side. One end of the air passage (3023) is screwed with an air line connector (35), and the other end is connected to the sink (3021).

Images