Automatic press fitting machine for crankshaft connecting rod bushing

Abstract

The utility model discloses a kind of automatic press-fitting machines of bushing of crankshaft connecting rod, including press-fitting mechanism being installed in the top of workbench, setting in the limiting seat of workbench upper end surface and setting in the inside of workbench material discharging mechanism, the material discharging mechanism includes fixed seat being fixed in the inside of workbench upper end surface, fixed seat is hollow structure;The bottom of fixed seat is equipped with the lifting support platform of longitudinal adjustment, the top of lifting support platform is fixed with hollow limiting sleeve, limiting sleeve can be longitudinally moved along the central axis of fixed seat;The inside of fixed seat is also equipped with the material discharging seat for supporting bushing;The top of limiting sleeve is provided with the return spring for supporting material discharging seat, and return spring is installed in the inside of fixed seat.The utility model solves the problem that bushing is inconvenient to take out after press-fitting.

Description

Technical Field

[0001] This utility model relates to the technical field of crankshaft connecting rod processing equipment, specifically to an automatic press-fitting machine for crankshaft connecting rod bushings. Background Technology

[0002] Crankshaft connecting rod production requires press-fitting of bushings, a process typically performed using a bushing press-fitting machine. Existing technology, for example, discloses an automatic bushing press-fitting machine (authorization announcement number CN222754810U), comprising a press-fitting platform, a workpiece, a fixed structure, a rotating structure, a support plate, a mounting arm, and a press-fitting machine body. The press-fitting platform has an mounting groove on its upper surface, and a workpiece is placed above the groove. The workpiece has punched holes on its upper surface. A fixed structure is located inside the mounting groove. A rotating structure is located on the upper surface of the press-fitting platform, and a support plate is placed above the rotating structure, positioned above the workpiece. A mounting arm is located on one side of the support plate, and the press-fitting machine body is fixedly connected to the lower surface of the mounting arm. This automatic bushing press-fitting machine, by incorporating a fixed structure, allows for easy alignment of the workpiece's punched holes with the mounting holes on the support plate. When the position of the punched holes on the workpiece's upper surface does not correspond to the mounting holes on the support plate, the sliding of the adjusting block changes the position of the support plate, thereby adjusting the workpiece's position. This facilitates aligning the punched holes on the workpiece's upper surface with the mounting holes on the support plate, effectively improving the versatility of the automatic bushing press-fitting machine.

[0003] In the aforementioned existing automatic press-fitting machine for bushings, the bushing and shaft remain in the installation position after the press-fitting operation is completed, making it impossible to remove them smoothly. Therefore, an automatic press-fitting machine for crankshaft connecting rod bushings is proposed. Utility Model Content

[0004] To address the aforementioned problems, an automatic press-fitting machine for crankshaft connecting rod bushings is provided. By utilizing the elimination or weakening of the pressing pressure of the pressing mechanism on the unloading seat, the compressive force of the return spring is weakened or eliminated, releasing the potential energy accumulated in the return spring. This allows the return spring to push the unloading seat, which in turn moves the bushing and shaft upwards, solving the problem of inconvenient bushing removal after press-fitting.

[0005] To address the existing technical problems, this application provides an automatic press-fitting machine for crankshaft connecting rod bushings, including a press-fitting mechanism installed on the top of a worktable, a limiting seat disposed on the upper surface of the worktable, and a feeding mechanism disposed inside the worktable. The feeding mechanism includes a fixed seat fixed to the upper surface inside the worktable, and the fixed seat has a hollow structure. The bottom of the fixed base is equipped with a vertically adjustable lifting support platform, and the top of the lifting support platform is fixed with a hollow limiting sleeve, which can move longitudinally along the central axis of the fixed base. The fixed base also has a feeding seat for supporting the bushing; The top of the limiting sleeve is equipped with a return spring for supporting the feeding seat, and the return spring is installed inside the fixed seat. The limiting seat is fixed to the upper surface of the workbench, and the bottom of the limiting seat can limit the feeding seat.

[0006] As one technical solution of this application, the fixed base is longitudinally fixed with limit rods on both sides, and a movable frame is fixed at the bottom end of the limit rods. A threaded hole is opened at the center of the movable frame. The bottom of the lifting support platform is equipped with a rotatable threaded rod that can be inserted into a threaded hole, with the threaded hole and the threaded rod engaging.

[0007] As one technical solution of this application, the lifting support platform is provided with symmetrical limiting holes on both sides, penetrating its upper and lower end faces; The limiting rod can pass through the limiting hole, and the limiting rod and the limiting hole slide together.

[0008] As one technical solution of this application, the pressing mechanism includes a hydraulic telescopic component that is longitudinally fixed to the top of the workbench, and a pressing head that can press down on the upper surface of the bushing is fixed to the retracted end of the hydraulic telescopic component.

[0009] As one technical solution of this application, a clearance hole is provided at the center of the bottom end of the pressing head.

[0010] As one technical solution of this application, the top of the workbench is provided with symmetrical sliding holes on the side near the hydraulic telescopic component; The pressing head is externally fixed with a stabilizing frame, and slide rods that can move along the central axis of the slide hole are longitudinally fixed on both sides of the stabilizing frame.

[0011] The advantages of this utility model application compared to the prior art are: 1. This application utilizes the pressing mechanism to reduce or eliminate the downward pressure on the discharge seat, thereby reducing or eliminating the compressive force of the return spring. At this point, the potential energy accumulated in the return spring is released. This allows the return spring to push the discharge seat, which in turn causes the discharge seat to move the bushing and shaft upwards. This solves the problem of inconvenient bushing removal after pressing.

[0012] 2. This application utilizes a rotating threaded rod, which, through a threaded hole that mates with the rod, drives the lifting support platform longitudinally, thereby adjusting the height of the lifting support platform. This solves the problem that the feeding mechanism cannot be adjusted according to the length of the shaft. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of an automatic press-fitting machine for crankshaft connecting rod bushings. Figure 1 .

[0014] Figure 2A three-dimensional structural diagram of an automatic press-fitting machine for crankshaft connecting rod bushings. Figure 2 .

[0015] Figure 3 A three-dimensional structural diagram of the pressing mechanism in an automatic pressing machine for crankshaft connecting rod bushings. Figure 1 .

[0016] Figure 4 A three-dimensional structural diagram of the pressing mechanism in an automatic pressing machine for crankshaft connecting rod bushings. Figure 2 .

[0017] Figure 5 This is a sectional view of the unloading mechanism in an automatic press-fitting machine for crankshaft connecting rod bushings.

[0018] Figure 6 This is an exploded view of the unloading mechanism in an automatic press-fitting machine for crankshaft connecting rod bushings.

[0019] The following are the labels in the diagram: 1. Workbench; 11. Sliding hole; 2. Pressing mechanism; 21. Hydraulic telescopic component; 22. Pressing head; 221. Clearance hole; 23. Stabilizing frame; 24. Sliding rod; 3. Limiting seat; 4. Unloading mechanism; 41. Fixed seat; 42. Limiting hole; 43. Lifting support platform; 431. Limiting sleeve; 44. Limiting rod; 45. Moving frame; 46. Return spring; 47. Threaded hole; 48. Threaded rod; 49. Unloading seat. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model application, the following detailed description of this utility model application is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] See Figures 1-6 As shown, an automatic press-fitting machine for crankshaft connecting rod bushings includes a press-fitting mechanism 2 installed on the top of a workbench 1, a limiting seat 3 disposed on the upper surface of the workbench 1, and a feeding mechanism 4 disposed inside the workbench 1. The feeding mechanism 4 includes a fixing seat 41 fixed to the upper surface inside the workbench 1, and the fixing seat 41 has a hollow structure. The bottom of the fixed base 41 is equipped with a vertically adjustable lifting support platform 43, and the top of the lifting support platform 43 is fixed with a limiting sleeve 431 with a central hole. The limiting sleeve 431 can move longitudinally along the central axis of the fixed base 41. The fixed base 41 is also equipped with a feeding base 49 for supporting the bushing; The top of the limiting sleeve 431 is provided with a return spring 46 for supporting the feeding seat 49, and the return spring 46 is installed inside the fixed seat 41. The limiting seat 3 is fixed on the upper surface of the workbench 1, and the bottom of the limiting seat 3 can limit the feeding seat 49.

[0022] During the pressing process, the shaft is inserted longitudinally into the lifting support platform 43, and then the bushing is fitted onto the shaft. At this time, the bottom of the bushing contacts the upper surface of the feeding seat 49. Then, the pressing mechanism 2 is activated, so that the downward pressure of the pressing mechanism 2 acts on the bushing, thereby pressing the bushing onto the shaft. During this process, the bushing is subjected to downward pressure, causing the feeding seat 49 to move downward until the bushing is completely fitted onto the shaft. At the same time, as the feeding seat 49 moves downward, it compresses the return spring 46 placed in the fixed seat 41. After the pressing is completed, the pressing mechanism 2 moves upward. During this process, the downward pressure of the pressing mechanism 2 on the feeding seat 49 disappears or weakens, so the compressive force of the return spring 46 weakens or disappears. At this time, the potential energy accumulated by the return spring 46 is released. This allows the return spring 46 to push the feeding seat 49, thereby causing the feeding seat 49 to drive the bushing and the shaft upward. This solves the problem of inconvenient removal of the bushing after pressing.

[0023] See Figure 5 and Figure 6 As shown, the fixed base 41 has a limit rod 44 fixed longitudinally on both sides, and a movable frame 45 is fixed at the bottom end of the limit rod 44. A threaded hole 47 is provided at the center of the movable frame 45. The bottom end of the lifting support platform 43 is equipped with a rotatable threaded rod 48, which can be inserted into a threaded hole 47, and the threaded hole 47 and the threaded rod 48 are threadedly engaged.

[0024] When the threaded rod 48 is rotated, it drives the lifting support platform 43 to move longitudinally through the threaded hole 47 that mates with the thread, thereby adjusting the height of the lifting support platform 43. This solves the problem that the feeding mechanism 4 cannot be adjusted according to the length of the shaft.

[0025] See Figure 5 and Figure 6 As shown, the lifting support platform 43 has symmetrical limiting holes 42 on both sides that penetrate its upper and lower end faces. The limiting rod 44 can pass through the limiting hole 42, and the limiting rod 44 and the limiting hole 42 are in sliding fit.

[0026] To ensure the stability of the lifting support platform 43, when the lifting support platform 43 moves longitudinally, the lifting support platform 43 will move along the central axis of the limiting rod 44 through the limiting hole 42, so that the limiting rod 44 and the limiting hole 42 cooperate to limit the lifting support platform 43, thereby preventing the lifting support platform 43 from rotating axially.

[0027] See Figure 3 and Figure 4 As shown, the pressing mechanism 2 includes a hydraulic telescopic component 21 that is longitudinally fixed to the top of the workbench 1. The retracted end of the hydraulic telescopic component 21 is fixed with a pressing head 22 that can press down on the upper surface of the bushing.

[0028] When the hydraulic telescopic component 21 is activated, it drives the pressing head 22 downward through its retracting end. When the bottom end of the pressing head 22 contacts the top of the bushing, the pressing head 22 drives the bushing downward, thereby allowing the bushing to be fully fitted onto the shaft.

[0029] See Figure 4 As shown, a clearance hole 221 is provided at the center of the bottom end of the pressing head 22.

[0030] To prevent the pressing head 22 from colliding with the shaft during the pressing of the bushing, a clearance hole 221 is provided at the center of the bottom end of the pressing head 22. When the pressing head 22 moves the bushing downwards, the bushing moves along the central axis of the shaft. At this time, the rotating tip extends upwards from the top of the bushing, and the top of the shaft enters the interior of the clearance hole 221. This effectively prevents the shaft from colliding with the pressing head 22, thus avoiding the inability to perform the pressing operation.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, sliding holes 11 are symmetrically provided on the side of the top of the workbench 1 near the hydraulic telescopic component 21; The press head 22 is externally fixed with a stabilizing frame 23, and the stabilizing frame 23 has longitudinally fixed sliding rods 24 on both sides that can move along the central axis of the sliding hole 11.

[0032] To ensure the stability of the pressing head 22, a stabilizing frame 23 is fixed to the outside of the pressing head 22. When the pressing head 22 moves longitudinally, it drives the stabilizing frame 23 to move synchronously. Simultaneously, the stabilizing frame 23 drives the sliding rod 24 to move along the central axis of the sliding hole 11. This achieves mutual cooperation between the stabilizing frame 23, the sliding rod 24, and the sliding hole 11 to limit the movement of the pressing head 22. This not only increases the strength of the pressing head 22 but also effectively prevents it from shifting.

[0033] The above embodiments only illustrate one or more implementation methods of this utility model application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model application, and these all fall within the protection scope of this utility model application. Therefore, the protection scope of this utility model application should be determined by the appended claims.

Claims

1. An automatic press-fitting machine for crankshaft connecting rod bushings, comprising a press-fitting mechanism (2) mounted on the top of a worktable (1), a limiting seat (3) disposed on the upper surface of the worktable (1), and a feeding mechanism (4) disposed inside the worktable (1), characterized in that, The feeding mechanism (4) includes a fixed seat (41) fixed inside the upper surface of the workbench (1), and the fixed seat (41) is a hollow structure; The bottom of the fixed seat (41) is equipped with a vertically adjustable lifting support platform (43), and the top of the lifting support platform (43) is fixed with a limiting sleeve (431) with a central hole. The limiting sleeve (431) can move longitudinally along the central axis of the fixed seat (41). The inside of the fixed seat (41) is also equipped with a feeding seat (49) for supporting the bushing. The top of the limiting sleeve (431) is provided with a return spring (46) for supporting the feeding seat (49), and the return spring (46) is installed inside the fixed seat (41); The limiting seat (3) is fixed on the upper surface of the workbench (1), and the bottom of the limiting seat (3) can limit the feeding seat (49).

2. The automatic press-fitting machine for crankshaft connecting rod bushings according to claim 1, characterized in that, The fixed base (41) has a limit rod (44) fixed longitudinally on both sides, and a movable frame (45) is fixed at the bottom end of the limit rod (44). A threaded hole (47) is opened at the center of the movable frame (45). The bottom end of the lifting support platform (43) is equipped with a rotatable threaded rod (48), which can be inserted into the threaded hole (47), and the threaded hole (47) and the threaded rod (48) are threadedly engaged.

3. The automatic press-fitting machine for crankshaft connecting rod bushings according to claim 1, characterized in that, The lifting support platform (43) has symmetrical limiting holes (42) on both sides that penetrate its upper and lower end faces. The limiting rod (44) can pass through the limiting hole (42), and the limiting rod (44) and the limiting hole (42) slide together.

4. An automatic press-fitting machine for crankshaft connecting rod bushings according to claim 1, characterized in that, The pressing mechanism (2) includes a hydraulic telescopic component (21) that is longitudinally fixed to the top of the workbench (1). The retracted end of the hydraulic telescopic component (21) is fixed with a pressing head (22) that can press down on the upper surface of the bushing.

5. An automatic press-fitting machine for crankshaft connecting rod bushings according to claim 4, characterized in that, A clearance hole (221) is provided at the center of the bottom end of the pressing head (22).

6. An automatic press-fitting machine for crankshaft connecting rod bushings according to claim 4, characterized in that, The workbench (1) has symmetrical sliding holes (11) on the side of the top of the workbench (1) near the hydraulic telescopic component (21). The press head (22) is externally fixed with a stabilizing frame (23), and the stabilizing frame (23) has slide rods (24) that can move along the central axis of the slide hole (11) on both sides.

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