Automatic aligning device for press

Abstract

This utility model relates to the field of press assembly technology, specifically to an automatic self-aligning device for a press assembly machine. It includes a press assembly body, a press assembly component fixedly connected to the top of the press assembly body, a mounting platform fixedly connected to the surface of the press assembly body, a positioning boss fixedly connected to the top of the mounting platform, a connecting plate mounted on the top of the mounting platform, two sets of positioning bosses fixedly connected to the top of the connecting plate, a fixing block mounted on the top of the connecting plate, a placement plate fixedly connected to the top of the fixing block, and a self-aligning structure on the top of the press assembly body. This utility model features a self-aligning structure that enables automatic centering of offset workpieces, improving processing accuracy, eliminating lateral forces, enhancing equipment protection, eliminating the need for manual adjustment, and making it more convenient to use. The mounting platform and positioning bosses eliminate the need for manual alignment of the three components, making installation more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of press assembly technology, and specifically relates to an automatic self-aligning device for press assembly. Background Technology

[0002] In the assembly of core components such as automotive engine blocks and transmission housings, the press-fitting of bearings, bushings, and other components is a critical process, requiring the coaxiality of the press head axis of the press-fitting machine with the axis of the workpiece's press-fitting hole (typically ≤0.05mm). If the coaxiality deviation exceeds the allowable range, it can lead to workpiece damage, press-fitting accuracy failure, and accelerated equipment wear. Existing solutions rely on manual adjustment of tooling positioning or the use of elastic guide sleeves to compensate for deviations, requiring operators to repeatedly measure coaxiality. This only achieves linear floating in a single direction, resulting in low efficiency and limited compensation range. Furthermore, existing press-fitting machines typically use bolts for mounting without positioning components, necessitating manual alignment during installation, which is inconvenient. Therefore, we propose an automatic self-aligning device for press-fitting machines. Utility Model Content

[0003] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide an automatic self-aligning device for a press machine, so as to solve the problems mentioned in the background art, which require operators to repeatedly measure coaxiality, can only achieve linear floating in one direction, have low efficiency and limited compensation range, and the existing press machine mounting platform is generally fixed by bolts without positioning components, which leads to the need for manual alignment during installation, which is quite inconvenient.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an automatic self-aligning device for a press machine, comprising a press machine body, a press assembly fixedly connected to the top of the press machine body, a mounting platform fixedly connected to the surface of the press machine body, a positioning boss fixedly connected to the top of the mounting platform, a connecting plate mounted on the top of the mounting platform, two sets of positioning bosses fixedly connected to the top of the connecting plate, a fixing block mounted on the top of the connecting plate, a placement plate fixedly connected to the top of the fixing block, a self-aligning structure provided on the top of the press machine body, the self-aligning structure comprising a fixed seat, a connecting hole opened on the top of the fixed seat, a floating seat provided on the top of the placement plate, a housing fixedly connected to the top of the floating seat, a pressure head fixedly connected to the surface of the floating seat, a retainer fixedly connected inside the housing, a bearing ball rotatably connected inside the retainer, a circular groove opened at the bottom of the inner wall of the housing, a spring fixedly connected inside the circular groove, a push plate fixedly connected to the top of the spring, and a gasket fixedly connected to the bottom of the fixed seat.

[0005] Preferably, the connecting holes are evenly distributed circumferentially on the top of the fixing seat, and the fixing seat is fixedly connected to the bottom flange of the press-fit assembly through the connecting holes and bolts.

[0006] Preferably, the floating seat and the fixed seat are coaxially arranged, and the outer shell and the floating seat are fixed to each other by bolts.

[0007] Preferably, the cage is annular, and the surface of the cage is provided with a plurality of axially penetrating spherical limiting grooves. The bearing balls are rotatably connected in the spherical limiting grooves, and the top and bottom of the bearing balls are in contact with the workpiece and the top of the push plate, respectively. The diameter of the spherical limiting groove is larger than the diameter of the bearing balls.

[0008] Preferably, the floating seat has a tapered positioning pin at the center of its end face away from the fixed seat, and the pressure head is fixedly connected to the floating seat through the tapered positioning pin.

[0009] Preferably, the surface of the connecting plate is provided with a second circular groove, the connecting plate is slidably connected to the outside of the first positioning boss through the second circular groove, and the connecting plate is fixedly connected to the top of the mounting platform by bolts.

[0010] Preferably, the fixing block has three circular grooves on both sides, the fixing block is slidably connected to the outside of the positioning boss two through the three circular grooves, and the fixing block is fixedly connected to the top of the connecting plate by bolts.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This automatic self-aligning device for a press machine is equipped with a self-aligning structure. During press-fitting, the press-fitting assembly drives the fixed seat to move down and contact the workpiece's press-fitting hole. Through the rolling of the bearing balls, the floating seat can float slightly relative to the fixed seat in the X and Y axis directions perpendicular to the press-fitting axis. At the same time, it can also offset angularly in any direction in the plane perpendicular to the press-fitting axis. This enables automatic centering of the offset workpiece, improves processing accuracy, eliminates lateral forces, enhances equipment protection, eliminates the need for manual adjustment, and makes it more convenient to use.

[0012] 2. The automatic self-aligning device for the press is equipped with a mounting platform and a second positioning boss. The positioning boss and the second round groove cooperate to achieve quick positioning of the fixing block, connecting plate and mounting platform during installation. No manual alignment of the three is required, making installation more convenient. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2This is a structural schematic diagram of the press-fitting assembly, mounting platform, and self-aligning structure of this utility model; Figure 3 This is a cross-sectional view of the self-aligning structure of this utility model; Figure 4 This is an exploded view of the self-aligning structure of this utility model; Figure 5 This is an exploded view of the structure of the mounting platform, connecting plate, and fixing block of this utility model.

[0014] In the diagram: 1. Press machine body; 11. Press assembly; 12. Mounting platform; 13. Positioning boss one; 14. Connecting plate; 15. Positioning boss two; 16. Fixing block; 17. Placement plate; 2. Self-aligning structure; 21. Fixing seat; 22. Connecting hole; 23. Outer shell; 24. Floating seat; 25. Press head; 26. Cage; 27. Bearing ball; 28. Circular groove one; 29. ​​Spring; 210. Push plate; 211. Gasket. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-5 One embodiment provided by this utility model: An automatic self-aligning device for a press machine includes a press machine body 1. A press assembly 11 is fixedly connected to the top of the press machine body 1. A mounting platform 12 is fixedly connected to the surface of the press machine body 1. A positioning boss 13 is fixedly connected to the top of the mounting platform 12. A connecting plate 14 is mounted on the top of the mounting platform 12. Two sets of positioning bosses 15 are fixedly connected to the top of the connecting plate 14. A fixing block 16 is mounted on the top of the connecting plate 14. A placement plate 17 is fixedly connected to the top of the fixing block 16. A self-aligning structure 2 is provided on the top of the press machine body 1. The self-aligning structure 2 includes a fixing seat 21. A connecting hole 22 is opened on the top of the fixing seat 21. A floating seat 24 is provided on the top of the placement plate 17. A housing 23 is fixedly connected to the top of the floating seat 24. A pressure head 25 is fixedly connected to the surface of the floating seat 24. A retainer 26 is fixedly connected inside the housing 23. Bearing balls 27 are rotatably connected inside the retainer 26. A circular groove 28 is opened at the bottom of the inner wall of the housing 23. An internal fixed connection is provided with a spring 29, and a push plate 210 is fixedly connected to the top of the spring 29. A gasket 211 is fixedly connected to the bottom of the fixed seat 21. A self-aligning structure 2 is provided. During press fitting, the press fitting assembly 11 drives the fixed seat 21 to move down and contact the workpiece's press fitting hole. Through the rolling of the bearing balls 27, the floating seat 24 can float slightly relative to the fixed seat 21 in the X and Y axis directions perpendicular to the press fitting axis. At the same time, it can also be offset angularly in any direction in the plane perpendicular to the press fitting axis, thereby realizing automatic centering of the offset workpiece, improving processing accuracy, eliminating lateral force, improving equipment protection, eliminating the need for manual adjustment, and making it more convenient to use. A mounting platform 12 and a positioning boss 2 15 are provided. The cooperation of the positioning boss 1 13 and the circular groove 2, and the cooperation of the positioning boss 2 15 and the circular groove 3, realizes the quick positioning of the fixed block 16, the connecting plate 14 and the mounting platform 12 when they are installed together, eliminating the need for manual alignment of the three, making the installation more convenient.

[0017] Furthermore, the connecting holes 22 are evenly distributed around the top of the fixed base 21. The fixed base 21 is fixedly connected to the bottom flange of the press assembly 11 through the connecting holes 22 and bolts. The quick installation and disassembly between the fixed base 21 and the press assembly 11 is achieved through the cooperation of the connecting holes 22 and bolts.

[0018] Furthermore, the floating seat 24 and the fixed seat 21 are coaxially arranged, and the outer shell 23 and the floating seat 24 are fixed to each other by bolts, which facilitates the disassembly of the outer shell 23 for maintenance.

[0019] Furthermore, the cage 26 is annular, and multiple axially penetrating spherical limiting grooves are formed on the surface of the cage 26. The bearing balls 27 are rotatably connected in the spherical limiting grooves. The top and bottom of the bearing balls 27 are in contact with the top of the workpiece and the top of the push plate 210, respectively. The diameter of the spherical limiting groove is larger than the diameter of the bearing balls 27, so as to precisely control the rolling range of the bearing balls 27 and prevent the bearing balls 27 from sliding out of the spherical limiting groove.

[0020] Furthermore, a tapered positioning pin is provided at the center of the end face of the floating seat 24 away from the fixed seat 21, and the pressure head 25 is fixedly connected to the floating seat 24 through the tapered positioning pin, so as to realize the rapid and accurate docking between the pressure head 25 and the floating seat 24.

[0021] Furthermore, the surface of the connecting plate 14 is provided with a circular groove 2. The connecting plate 14 is slidably connected to the outside of the positioning boss 13 through the circular groove 2. The connecting plate 14 is fixedly connected to the top of the mounting platform 12 by bolts. The connecting plate 14 is slidably installed on the top of the mounting platform 12 through the cooperation of the circular groove 2 and the positioning boss 13, and then fixed by bolts.

[0022] Furthermore, the fixing block 16 has three circular grooves on both sides. The fixing block 16 is slidably connected to the outside of the positioning boss 2 15 through the three circular grooves. The fixing block 16 is fixedly connected to the top of the connecting plate 14 by bolts. The fixing block 16 is slidably installed on the top of the connecting plate 14 through the cooperation of the three circular grooves and the positioning boss 2 15, and then fixed by bolts.

[0023] Working principle: When the pressure head 25 is about to contact the hole to be pressed on the workpiece, due to the deviation of the workpiece hole, the pressure head 25 will first touch the edge of the hole. The hole wall will exert a lateral thrust on the pressure head 25. Since the pressure head 25 is fixed on the floating seat 24, this thrust is directly transmitted to the floating seat 24. This thrust overcomes the minimal rolling friction between the bearing balls 27 and the contact surface, causing the bearing balls 27 to roll within the cage 26. After the bearing balls 27 roll, the floating seat 24 moves the pressure head 25 together with it for a certain distance until the center line of the pressure head 25 is aligned with the center line of the hole to be pressed. When the center lines coincide, if the workpiece is tilted, the pressure head 25 will first contact one side of the hole to be pressed, forming uneven contact. This will generate a torque that causes the pressure head 25 to rotate. This torque will act on the floating seat 24, causing the bearing balls 27 on one side of the floating seat 24 to be squeezed, and the bearing balls 27 on the other side to move downwards. This causes the entire floating seat 24, along with the pressure head 25, to rotate to match the tilt angle of the hole to be pressed. Once the floating seat 24 has completed the fine adjustment of position and angle through the rolling of the bearing balls 27, making the pressure head 25 perfectly aligned with the hole to be pressed, the lateral force disappears. At this time, the vertical downward pressure continued to be applied by the pressing machine body 1 will be pressed into the hole vertically and without eccentric load through the fixed seat 21, the floating seat 24, and the pressure head 25. Because the alignment is good, the workpiece will not be scratched, and no harmful lateral force will be generated.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An automatic aligning device for a press machine, comprising a press machine body (1), characterized in that: The top of the press machine body (1) is fixedly connected to a press assembly (11), and the surface of the press machine body (1) is fixedly connected to a mounting platform (12). The top of the mounting platform (12) is fixedly connected to a positioning boss (13), and the top of the mounting platform (12) is equipped with a connecting plate (14). The top of the connecting plate (14) is fixedly connected to two sets of positioning bosses (15), and the top of the connecting plate (14) is equipped with a fixing block (16). The top of the fixing block (16) is fixedly connected to a placement plate (17). The top of the press machine body (1) is provided with a self-aligning structure (2), which includes a fixing seat (21). The top of the plate (17) is provided with a connecting hole (22). The top of the plate (17) is provided with a floating seat (24). The top of the floating seat (24) is fixedly connected with a shell (23). The surface of the floating seat (24) is fixedly connected with a pressure head (25). The inside of the shell (23) is fixedly connected with a retainer (26). The inside of the retainer (26) is rotatably connected with a bearing ball (27). The bottom of the inner wall of the shell (23) is provided with a circular groove (28). The inside of the circular groove (28) is fixedly connected with a spring (29). The top of the spring (29) is fixedly connected with a push plate (210). The bottom of the fixed seat (21) is fixedly connected with a gasket (211).

2. An automatic aligning device for a press according to claim 1, characterized in that: The connecting holes (22) are evenly distributed around the top of the fixed seat (21), and the fixed seat (21) is fixedly connected to the bottom flange of the press assembly (11) through the connecting holes (22) and bolts.

3. The automatic aligning device for a press according to claim 1, characterized in that: The floating seat (24) is coaxially arranged with the fixed seat (21), and the outer shell (23) is fixed to the floating seat (24) by bolts.

4. The automatic aligning device for a press according to claim 1, characterized in that: The retainer (26) is annular, and the surface of the retainer (26) is provided with a plurality of axially penetrating spherical limiting grooves. The bearing balls (27) are rotatably connected in the spherical limiting grooves. The top and bottom of the bearing balls (27) are in contact with the top of the workpiece and the push plate (210) respectively. The diameter of the spherical limiting groove is larger than the diameter of the bearing balls (27).

5. The automatic aligning device for a press according to claim 1, characterized in that: The floating seat (24) has a tapered positioning pin at the center of its end face away from the fixed seat (21), and the pressure head (25) is fixedly connected to the floating seat (24) through the tapered positioning pin.

6. The automatic aligning device for a press according to claim 1, characterized in that: The surface of the connecting plate (14) is provided with a circular groove. The connecting plate (14) is slidably connected to the outside of the positioning boss (13) through the circular groove. The connecting plate (14) is fixedly connected to the top of the mounting platform (12) by bolts.

7. The automatic self-aligning device for a press according to claim 1, characterized in that: The fixing block (16) has three circular grooves on both sides. The fixing block (16) is slidably connected to the outside of the positioning boss (15) through the three circular grooves. The fixing block (16) is fixedly connected to the top of the connecting plate (14) by bolts.

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