A bush press machine

Abstract

The utility model discloses a kind of bushing press fitting machine, including machine body, rotating limiting mechanism being arranged at the one side of machine body and top pressure subassembly being arranged at the other side of machine body, the rotating limiting mechanism includes the fixed plate being connected with the output end of step motor and the limiting rod for limiting fixed plate offset, detachably provided with pressure assembly on the fixed plate, the pressure assembly includes guide sleeve and the pressing plate being arranged on guide sleeve, lifting assembly is provided at the position below corresponding top pressure subassembly on the machine body, the lifting assembly includes the bottom plate lifted by push block drive.This utility model sets rotating limiting mechanism to position rotation to the position below top pressure subassembly, and top pressure subassembly promotes pressure assembly to press bushing into workpiece, among them, lifting assembly is also provided, to make bottom plate support pressure assembly in press fitting process, to improve press fitting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a bushing press-fitting machine. Background Technology

[0002] The vehicle subframe connects the body and suspension. In automobile production, bushings are installed at the mounting points between the subframe and the body to improve ride comfort. The current method for installing bushings to the subframe involves manually placing the bushings on the mounting points and then pressing them in one by one using a manual press. This manual pressing is laborious and inefficient. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a bushing press-fitting machine that can automatically switch the press-fitting position and ensure the stability and accuracy of the press-fitting.

[0004] To solve the above-mentioned technical problems, the present invention provides a bushing pressing machine, comprising a machine body, a rotation limiting mechanism disposed on one side of the machine body, and a pressing assembly disposed on the other side of the machine body. The rotation limiting mechanism includes a fixed plate connected to the output end of a stepper motor and a limiting rod for limiting the offset of the fixed plate. A pressing assembly is detachably disposed on the fixed plate. The pressing assembly includes a guide sleeve and a pressure plate sleeved on the guide sleeve. A lifting assembly is disposed on the machine body at a position below the pressing assembly. The lifting assembly includes a base plate that is lifted and lowered by a push block. In use, the pressing position of the workpiece is placed outside the guide sleeve, the bushing is placed on the guide sleeve, and the pressure plate is sleeved on the outside of the guide sleeve and covers the bushing. The stepper motor drives the fixed plate and the guide sleeve to rotate synchronously to the bottom of the pressing assembly. The limiting rod limits the offset of the fixed plate. The push block drives the base plate to move upward and abuts against the bottom of the pressing assembly. Finally, the pressing assembly squeezes the pressure plate and forces the bushing into the pressing position of the workpiece.

[0005] The above structure includes a top-pressing component for quick and easy assembly of the bushing, a rotation limiting mechanism for positioning the rotating fixing plate below the top-pressing component, and a clamping component for placing the bushing, which further facilitates pressing the bushing into the workpiece. A lifting component is also included, supported by the base plate during the pressing process to improve pressing efficiency. Specifically, the workpiece is positioned outside the guide boss, the bushing is placed at the guide boss position, and a pressure plate is fitted over the guide boss and covers the bushing. A stepper motor drives the fixing plate and guide boss to rotate synchronously below the top-pressing component. A push rod limits the offset of the fixing plate, and a push block moves the base plate upward, bringing it into contact with the bottom of the guide boss. Finally, the top-pressing component squeezes the pressure plate, forcing the bushing into the workpiece's pressing position.

[0006] To simplify the structure and facilitate installation and use, preferably, the top-pressing assembly includes a support platform mounted on the machine body and a cylinder mounted on the support platform. The output end of the cylinder is provided with a connecting rod that extends vertically downward through the support platform. A connecting plate is provided at the end of the connecting rod that extends outward. A guide rod that extends vertically upward through the support platform is provided at the upper end of the connecting plate. A top rod that extends vertically downward is provided at the lower end of the connecting plate.

[0007] To facilitate positioning and simplify the structure, preferably, the rotary positioning mechanism further includes a worktable connected to the machine body. The stepper motor is fixed on the worktable. A protruding plate is provided on the lower end face of the fixed plate, and a slot is provided on the protruding plate. A support plate is fixed on the worktable at the position corresponding to the slot. The support plate is fixedly connected to one side of a compression spring, and the other side of the compression spring is fixedly connected to one side of a positioning rod. The other side of the positioning rod extends vertically upward through the worktable. The protruding end of the positioning rod is provided with a "U"-shaped groove. The groove opening end face of the "U"-shaped groove fits against the protruding plate. A rotating wheel is provided in the "U"-shaped groove, and a rotating rod sleeved on the groove wall of the "U"-shaped groove is provided in the middle of the rotating wheel. The upper wheel surface is flush with the end face of the protruding end of the positioning rod.

[0008] For ease of installation and transmission, preferably, a sleeve plate is fixed on the support plate and sleeved on the outside of the compression spring, and a sleeve is provided on the sleeve plate and sleeved on the outside of the limiting rod; a strip-shaped through groove is provided on the limiting rod, and a pin is inserted through the strip-shaped through groove; a connecting hole is provided on the sleeve at the corresponding position of the pin protruding from the through groove, and the protruding end of the corresponding end of the pin extends into the connecting hole.

[0009] To avoid interference from movement, it is preferable that the end face of the "U"-shaped groove has a rounded corner structure.

[0010] To ensure the stability of the pressing direction, preferably, the pressing assembly also includes a base screwed to a fixed plate, a fixed sleeve fixedly mounted on the base, a stepped hole provided in the fixed sleeve, a guide sleeve passing through the stepped hole, a mounting hole provided on the guide sleeve, a tension spring inserted in the mounting hole, one side of the tension spring being fixedly connected to the base, and the other side abutting against the bottom of the mounting hole, and a boss being provided around one end of the guide sleeve in a circumferential direction, the boss abutting against and limiting the step surface of the stepped hole.

[0011] To avoid pressure attachment and facilitate part removal, preferably, a pad and a pressure plate are stacked sequentially from bottom to top on the guide sleeve, and the pad is provided with multiple ventilation holes.

[0012] To facilitate stable pressing and directional movement, preferably, a positioning pin is horizontally inserted on one side of the guide sleeve, and guide grooves are provided on the pad and the pressure plate at the positions corresponding to the positioning pin.

[0013] To avoid movement interference and to facilitate support for pressing, the lifting assembly preferably includes a linear motor fixed to the machine body and a positioning block facing the push block. The output end of the linear motor is connected to a pull rod that passes horizontally through the positioning block, and the protruding end of the pull rod is connected to the push block. The positioning block has a first transition slope on one side and a second transition slope on one side of the push block. The base plate is placed between the positioning block and the push block. The base plate has a first clearance slope that fits against the first transition slope on one side and a second clearance slope that fits against the second transition slope on the other side.

[0014] To facilitate defining the direction of movement of the base plate and prevent deviation, preferably, a guide protrusion is provided on the machine body at the position corresponding to the linear motor, covering the outside of the base plate. The guide protrusion has an opening at the position corresponding to the base plate, through which the upper end face of the base plate protrudes, and the end face of the protruding end of the base plate abuts against the lower end face of the base.

[0015] Beneficial effects: This utility model is equipped with a rotation limiting mechanism to position the bushing under the top pressing component. The top pressing component pushes the clamping component to press the bushing into the workpiece. In addition, a lifting component is provided so that the bottom plate supports the clamping component during the pressing process, thereby improving the pressing efficiency. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is the front view of the present invention.

[0019] Figure 3 This is a diagram showing the operational status of the rotary limit mechanism.

[0020] Figure 4 This is a schematic diagram of the installation structure of the rotary wheel.

[0021] Figure 5 This is a diagram showing the usage status of the pressure plate and the pad.

[0022] Figure 6 This is a schematic diagram of the clamping assembly.

[0023] Figure 7 This is a schematic diagram of the lifting component structure.

[0024] The meanings of the labels in the attached diagram are as follows:

[0025] Body-1; Support platform-10; Cylinder-11; Connecting plate-12; Guide rod-13; Push rod-14; Guide protrusion-15; Opening-151;

[0026] Stepper motor-2; Fixed plate-20; Limiting rod-21; Strip groove-210; Pin-211; Worktable-22; Slot-23; Support plate-24; Compression spring-25; Rotary wheel-26; Sleeve plate-27; Protruding plate-28; Sleeve-29;

[0027] Base-3; Guide sleeve-30; Mounting hole-300; Boss-301; Fixing sleeve-31; Tension spring-32; Positioning pin-33;

[0028] Pressure plate-4; guide groove-40; pad plate-41; vent hole-410;

[0029] Push block-5; Base plate-50; First clearance ramp-501; Second clearance ramp-502; Linear motor-51; Positioning block-52; First transition ramp-521; Second transition ramp-53; Pull rod-54;

[0030] Support block-6; Vertical clamp-60. Detailed Implementation

[0031] Depend on Figures 1 to 7 As shown, this utility model includes a body 1, a rotation limiting mechanism disposed on one side of the body 1, and a pressing assembly disposed on the other side of the body 1. The rotation limiting mechanism includes a fixed plate 20 connected to the output end of a stepper motor 2 and a limiting rod 21 for limiting the offset of the fixed plate 20. A pressing assembly is detachably disposed on the fixed plate 20. The pressing assembly includes a guide sleeve 30 and a pressure plate 4 disposed on the guide sleeve 30. A lifting assembly is disposed on the body 1 at a position below the pressing assembly. The lifting assembly includes a pusher block 5. The base plate 50 is driven to lift and lower. In use, the workpiece is placed on the outside of the guide sleeve 30, the bushing is placed at the position of the guide sleeve 30, and the pressure plate 4 is placed on the outside of the guide sleeve 30 and covers the bushing. Then, the stepper motor 2 drives the fixing plate 20 and the guide sleeve 30 to rotate synchronously to the bottom of the top pressing assembly. The limiting rod 21 limits the offset of the fixing plate 20. Then, the push block 5 drives the base plate 50 to move upward and make the base plate 50 abut against the bottom of the pressing assembly. Finally, the top pressing assembly squeezes the pressure plate 4 and squeezes the bushing into the workpiece pressing position.

[0032] Specifically, the top pressing assembly includes a support platform 10 mounted on the machine body 1 and a cylinder 11 mounted on the support platform 10. The output end of the cylinder 11 is provided with a connecting rod that passes vertically downward through the support platform 10. A connecting plate 12 is provided at the end of the connecting rod. A guide rod 13 that passes vertically upward through the support platform 10 is provided at the upper end of the connecting plate 12. A top rod 14 that extends vertically downward is provided at the lower end of the connecting plate 12.

[0033] The rotation limiting mechanism also includes a worktable 22 connected to the machine body 1. The stepper motor 2 is fixed on the worktable 22. A protruding plate 28 is provided on the lower end face of the fixed plate 20. A slot 23 is provided on the protruding plate 28. A support plate 24 is fixed on the worktable 22 at the position corresponding to the slot 23. The support plate 24 is fixedly connected to one side of the compression spring 25. The other side of the compression spring 25 is fixedly connected to one side of the limiting rod 21. The other side of the limiting rod 21 extends vertically upward through the worktable 22. The protruding end of the limiting rod 21 is provided with a "U"-shaped groove. The groove opening end face of the "U"-shaped groove is in contact with the protruding plate 28. A rotating wheel 26 is provided in the "U"-shaped groove. A rotating rod sleeved on the groove wall of the "U"-shaped groove is provided in the middle of the rotating wheel 26. The upper wheel surface of the rotating wheel 26 is flush with the end face of the protruding end of the limiting rod 21. The groove opening end face of the "U"-shaped groove has a rounded corner structure.

[0034] The support plate 24 is fixedly provided with a sleeve plate 27 sleeved on the outside of the compression spring 25, and the sleeve plate 27 is provided with a sleeve 29 sleeved on the outside of the limiting rod 21; the limiting rod 21 is provided with a strip-shaped through groove 210, and a pin 211 is inserted through the strip-shaped through groove 210. The sleeve 29 is provided with connecting holes at the corresponding protruding positions of the pin 211, and the protruding end of the corresponding end of the pin 211 extends into the connecting hole.

[0035] The clamping assembly also includes a base 3 screwed to the fixing plate 20. A fixing sleeve 31 is fixed on the base 3. A stepped hole is provided in the fixing sleeve 31. A guide sleeve 30 passes through the stepped hole. An installation hole 300 is provided on the guide sleeve 30. A tension spring 32 is inserted into the installation hole 300. One side of the tension spring 32 is fixedly connected to the base 3, and the other side abuts against the bottom of the installation hole 300. A boss 301 is provided around one end of the guide sleeve 30 in the circumferential direction. The boss 301 abuts against and limits the stepped surface of the stepped hole.

[0036] Among them, a pad 41 and a pressure plate 4 are stacked on the guide sleeve 30 from bottom to top, and the pad 41 is provided with multiple ventilation holes 410; a positioning pin 33 is horizontally inserted on one side of the guide sleeve 30, and a guide groove 40 is provided on the pad 41 and the pressure plate 4 at the position corresponding to the positioning pin 33.

[0037] The lifting assembly also includes a linear motor 51 fixed on the body 1 and a positioning block 52 facing the push block 5. The output end of the linear motor 51 is connected to a pull rod 54 that passes horizontally through the positioning block 52. The protruding end of the pull rod 54 is connected to the push block 5. A first transition slope 521 is provided on one side of the positioning block 52, and a second transition slope 53 is provided on one side of the push block 5. The base plate 50 is placed between the positioning block 52 and the push block 5. A first clearance slope 501 that fits against the first transition slope 521 is provided on one side of the base plate 50, and a second clearance slope 502 that fits against the second transition slope 53 is provided on the other side of the base plate 50.

[0038] A guide protrusion 15 is provided on the body 1 at the position corresponding to the linear motor 51, covering the outside of the base plate 50. An opening 151 is provided on the guide protrusion 15 at the position corresponding to the base plate 50, allowing the upper end face of the base plate 50 to protrude from the upper end face of the guide protrusion 15. The protruding end face of the base plate 50 abuts against the lower end face of the base 3.

[0039] The working principle of this utility model is as follows:

[0040] like Figures 1 to 7 As shown, first, place the hole-shaped position of the workpiece to be pressed onto the fixed sleeve 31, and position it outside the guide sleeve 30. A gap is formed between the outer wall of the guide sleeve 30 and the inner wall of the hole-shaped position for placing the bushing. Next, place the bushing outside the guide sleeve 30 and push it down. During this process, the outer wall of the guide sleeve 30 and the inner wall of the bushing remain in contact, and the pressing end of the bushing is located at the port of the workpiece pressing position. Since the outer diameter of the bushing and the inner diameter of the workpiece pressing position are transition fit, the workpiece should be pre-machined with a guide bevel (not shown) at the pressing position so that the bushing can be smoothly pressed into the workpiece.

[0041] Then, the pad 41 and the pressure plate 4 are stacked on the guide sleeve 30 in sequence, with the pad 41 stacked on the upper end of the bushing and the pressure plate 4 stacked on the upper end of the pad 41. At the same time, a positioning pin 33 is horizontally inserted on one side of the guide sleeve 30, and guide grooves 40 are provided on the pad 41 and the pressure plate 4 at the positions corresponding to the positioning pin 33, so as to ensure that the pressure plate 4 and the pad 41 do not shift during the pressing and moving process.

[0042] Subsequently, stepper motor 2 is started, driving the fixed plate 20 and the workpiece to rotate synchronously. When the workpiece rotates to its position, the limiting rod 21 is located in the downward-facing "V"-shaped groove 23. Under the elastic force of the compression spring 25, the limiting rod 21 moves upward along the axial direction of the strip groove 210, that is, the limiting rod 21 extends into the groove 23, the wheel surface of the rotating wheel 26 leaves the groove wall of the groove 23, and the groove wall of the groove 23 abuts against the inserted end of the limiting rod 21 for limiting. At this time, stepper motor 2 is turned off. At the same time, the linear motor 51 is turned on, driving the push block 5 to move towards the positioning block 52. The first transition slope 521 and the first clearance slope 501, as well as the second transition slope 53 and the second clearance slope 502, work together to assist the base plate 50 to move upward and protrude the opening 151 on the upper end of the guide protrusion 15. The linear motor 51 is turned off, and the protruding end of the base plate 50 abuts against the lower end of the base 3, providing support for the press-fit position.

[0043] Finally, the cylinder 11 is activated, which drives the connecting plate 12 to move downward along the axial direction of the guide rod 13, and the push rod 14 presses the pressure plate 4 and the pad 41, thereby pressing the bushing into the workpiece.

[0044] After pressing, start cylinder 11 moves push rod 14 upward, and simultaneously start linear motor 51 to move base plate 50 downward to avoid rotational interference. Then, start stepper motor 2 to drive fixed plate 20 to continue rotating horizontally. During this process, because the end face of the "U"-shaped groove is rounded, it tends to yield when it meets the force of the slot 23. In addition, the connection effect of compression spring 25 causes limit rod 21 to be pressed against compression spring 25. During horizontal rotation, limit rod 21 moves out of "V"-shaped slot 23, and the wheel surface of rotating wheel 26 abuts against the convex plate 28. Then it moves to the position of the next slot 23, and limit rod 21 extends into the corresponding slot 23 again. Then stepper motor 2 is turned off. Then, according to the above operation, the corresponding bushing is pressed into the workpiece. This is repeated to achieve the purpose of rapid pressing of bushing.

[0045] It should be noted that, in order to better ensure the stability of the workpiece during the pressing process and avoid the bushing from being pressed crooked, a support block 6 and a vertical clamping device 60 are screwed onto the fixed plate 20 in accordance with the shape of the workpiece, so as to effectively position and press the workpiece.

[0046] Furthermore, to better coordinate the linkage between various components and effectively avoid movement interference, the stepper motor 2, cylinder 11, and linear motor 51 in this embodiment are all connected to a PLC controller (not shown). Cylinder 11 is also connected to an air pump (not shown). Figure 1The control panel shown here provides unified adjustment operations. This only involves adjusting relevant parameters and does not adjust the program usage. Therefore, the connection of the PLC controller will not be described in detail here.

Claims

1. A bushing press-fitting machine, characterized in that: The device includes a body (1), a rotation limiting mechanism on one side of the body (1), and a pressing assembly on the other side of the body (1). The rotation limiting mechanism includes a fixed plate (20) connected to the output end of a stepper motor (2) and a limiting rod (21) for limiting the offset of the fixed plate (20). A pressing assembly is detachably provided on the fixed plate (20). The pressing assembly includes a guide sleeve (30) and a pressure plate (4) provided on the guide sleeve (30). A lifting assembly is provided on the body (1) at a position below the pressing assembly. The lifting assembly includes a pusher block (5). The bottom plate (50) is driven to rise and fall; the pressing position of the workpiece is placed outside the guide sleeve (30), the bushing is placed at the position of the guide sleeve (30), and the pressure plate (4) is placed on the outside of the guide sleeve (30) and covered on the bushing. The stepper motor (2) is started to drive the fixing plate (20) and the guide sleeve (30) to rotate synchronously to the bottom of the top pressing assembly. The limit rod (21) is used to limit the offset of the fixing plate (20). The push block (5) drives the bottom plate (50) to move up and abut against the bottom of the pressing assembly. Finally, the top pressing assembly is started to squeeze the pressure plate (4) and squeeze the bushing into the pressing position of the workpiece.

2. The bushing press-fitting machine as described in claim 1, characterized in that: The top pressing assembly includes a support platform (10) mounted on the body (1) and a cylinder (11) mounted on the support platform (10). The output end of the cylinder (11) is provided with a connecting rod that passes vertically downward through the support platform (10). A connecting plate (12) is provided at the end of the connecting rod. A guide rod (13) that passes vertically upward through the support platform (10) is provided at the upper end of the connecting plate (12). A top rod (14) that extends vertically downward is provided at the lower end of the connecting plate (12).

3. A bushing press-fitting machine as described in claim 2, characterized in that: The rotation limiting mechanism also includes a worktable (22) connected to the machine body (1). The stepper motor (2) is fixed on the worktable (22). A protrusion (28) is provided on the lower end face of the fixed plate (20). A slot (23) is provided on the protrusion (28). A support plate (24) is fixed on the worktable (22) at the position corresponding to the slot (23). The support plate (24) is fixedly connected to one side of the compression spring (25), and the other side of the compression spring (25) is fixedly connected to... One side of the limiting rod (21) is fixedly connected, and the other side of the limiting rod (21) extends vertically upward through the worktable (22). The end of the limiting rod (21) is provided with a "U"-shaped groove. The end face of the groove of the "U"-shaped groove is in contact with the convex plate (28). A rotating wheel (26) is provided in the "U"-shaped groove. A rotating rod is provided in the middle of the rotating wheel (26) and sleeved on the groove wall of the "U"-shaped groove. The upper wheel surface of the rotating wheel (26) is flush with the end face of the end of the limiting rod (21).

4. A bushing press-fitting machine as described in claim 3, characterized in that: A sleeve plate (27) is fixed on the support plate (24) and sleeved on the outside of the compression spring (25). A sleeve (29) is provided on the sleeve plate (27) and sleeved on the outside of the limiting rod (21). A strip-shaped through groove (210) is provided on the limiting rod (21). A pin (211) is passed through the strip-shaped through groove (210). A connecting hole is provided on the sleeve (29) at the position where the pin (211) passes through. The end of the pin (211) at the corresponding end extends into the connecting hole.

5. A bushing press-fitting machine as described in claim 3, characterized in that: The end face of the "U"-shaped groove has a rounded corner structure.

6. A bushing press-fitting machine as described in claim 2, characterized in that: The clamping assembly also includes a base (3) screwed to a fixed plate (20). A fixed sleeve (31) is fixed on the base (3). A stepped hole is provided in the fixed sleeve (31). A guide sleeve (30) is inserted in the stepped hole. An installation hole (300) is provided on the guide sleeve (30). A tension spring (32) is inserted in the installation hole (300). One side of the tension spring (32) is fixedly connected to the base (3), and the other side abuts against the bottom of the installation hole (300). A boss (301) is provided around one end of the guide sleeve (30) in the circumferential direction. The boss (301) abuts against and limits the stepped surface of the stepped hole.

7. A bushing press-fitting machine as described in claim 6, characterized in that: A pad (41) and a pressure plate (4) are stacked on the guide sleeve (30) from bottom to top, and the pad (41) is provided with a plurality of vent holes (410).

8. A bushing press-fitting machine as described in claim 7, characterized in that: A positioning pin (33) is horizontally inserted on one side of the guide sleeve (30), and guide grooves (40) are provided on the pad (41) and pressure plate (4) at the positions corresponding to the positioning pin (33).

9. A bushing press-fitting machine as described in claim 6, characterized in that: The lifting assembly also includes a linear motor (51) fixed on the body (1) and a positioning block (52) facing the push block (5). The output end of the linear motor (51) is connected to a pull rod (54) that passes horizontally through the positioning block (52). The protruding end of the pull rod (54) is connected to the push block (5). A first transition slope (521) is provided on one side of the positioning block (52), and a second transition slope (53) is provided on one side of the push block (5). The base plate (50) is placed between the positioning block (52) and the push block (5). A first clearance slope (501) is provided on one side of the base plate (50) and fits against the first transition slope (521). A second clearance slope (502) is provided on the other side of the base plate (50) and fits against the second transition slope (53).

10. A bushing press-fitting machine as described in claim 9, characterized in that: A guide protrusion (15) is provided on the body (1) at the position corresponding to the linear motor (51) and is provided on the outside of the base plate (50). An opening (151) is provided on the guide protrusion (15) at the position corresponding to the base plate (50) so that the upper end face of the base plate (50) protrudes out of the upper end face of the guide protrusion (15). The end face of the protruding end of the base plate (50) abuts against the lower end face of the base (3).

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