Automatic bushing press-fitting machine for crankshaft connecting rod

Abstract

The invention belongs to the technical field of crankshaft connecting rod assembly, and provides an automatic bush pressing machine for a crankshaft connecting rod. A plurality of placing positions are uniformly distributed on the periphery of the turntable at intervals and are used for placing crankshaft connecting rods; the connecting rod feeding mechanism is used for placing the crankshaft connecting rod to be subjected to bush press fitting on the placing position of the workbench; the lining feeding mechanism is used for conveying the lining to the position above the rotary disc and conducting rotary positioning on the lining; the bush press-fitting mechanism comprises a pressing rod, the pressing rod is located above the containing position, the bush feeding mechanism enables the bush subjected to rotating positioning to be connected to the lower end of the pressing rod in a sleeving mode, and the bush press-fitting mechanism is used for driving the pressing rod to press the bush into a piston pin hole in the crankshaft connecting rod at the containing position; and the connecting rod discharging mechanism is used for moving the crankshaft connecting rod subjected to bush press fitting out of the workbench. The automatic press-fitting device has the advantages that the production efficiency is improved through automatic operation, the press-fitting process is more stable and reliable, and the press-fitting quality problem caused by improper manual operation is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of crankshaft connecting rod assembly, and in particular relates to an automatic bushing press for a crankshaft connecting rod. Background Art

[0002] The crankshaft connecting rod is one of the indispensable parts of a car engine. Its function is to connect the piston and the crankshaft, and transmit the gas pressure borne by the piston to the crankshaft, so that the reciprocating motion of the piston is converted into the rotational motion of the crankshaft and output work to the outside.

[0003] The crankshaft connecting rod 1 comprises a rod body 11 and a small end portion 12 and a large end portion 13 (such as Figure 1 As shown), the small end portion 12 is connected to the piston pin of the piston through the piston pin hole 121, and the large end portion 13 is connected to the crankshaft through the crankshaft pin hole 131. The small end portion 12 of the crankshaft connecting rod 1 is subjected to the gas force transmitted from the piston pin, its own swing, and the reciprocating inertia force of the piston group. The magnitude and direction of these forces are periodically changed, and the small end portion 12 of the crankshaft connecting rod 1 is mostly a thin-walled annular structure, which is often in a state of wear. Therefore, a bushing 2 is often arranged in the piston pin hole 121 to protect the crankshaft connecting rod 1, play a role in shock absorption, noise isolation, fatigue reduction, increase service life, and improve the operational stability of the vehicle. In addition, in order to facilitate the passage and entry of lubricating oil, a U-shaped groove 21 (such as Figure 2 As shown), when the bushing 2 is installed into the piston pin hole 121 of the crankshaft connecting rod 1, the U-shaped groove 21 of the bushing 2 needs to be rotated to a preset angle direction to ensure that the lubricating oil can smoothly enter the piston pin hole 121 to achieve lubrication between the bushing 2 and the piston pin.

[0004] Since the bushing 2 and the piston pin hole 121 of the small end portion 12 of the crankshaft connecting rod 1 are fixed by interference fit, in the prior art, the bushing 2 is generally knocked into the piston pin hole 121 of the crankshaft connecting rod 1 manually. Manual operation is not only inefficient but also has poor press-fitting stability, and it is becoming increasingly difficult to meet the requirements of modern production. Summary of the invention

[0005] The purpose of this application is to provide an automatic pressing machine for crankshaft connecting rod bushings, which greatly shortens the pressing time, improves production efficiency, and speeds up production through automated operation. Moreover, the automated pressing process is more stable and reliable, ensuring that each bushing is accurately pressed into the piston pin hole of the crankshaft connecting rod, reducing pressing quality problems caused by improper manual operation.

[0006] The technical solution adopted by the present application to solve the above technical problems is: to propose an automatic bushing press for a crankshaft connecting rod, comprising: a workbench; A turntable is arranged on the workbench, and a plurality of placement positions are evenly spaced around the turntable, and the placement positions are used to place the crankshaft connecting rod; A connecting rod loading mechanism is arranged on the workbench and located on one side of the turntable, and is used to place the crankshaft connecting rod to be press-fitted with a bushing on a placement position on the workbench; A bushing feeding mechanism is arranged on the workbench and located on one side of the turntable, and is used to convey the bushing to the top of the turntable and perform rotational positioning on the bushing; A bushing press-fitting mechanism is arranged on the workbench and located on one side of the turntable, the bushing press-fitting mechanism comprises a press rod, the press rod is located above the placement position, the bushing feeding mechanism sleeves the bushing after rotation and positioning on the lower end of the press rod, and the bushing press-fitting mechanism is used to drive the press rod to press the bushing into the piston pin hole on the crankshaft connecting rod at the placement position; A connecting rod unloading mechanism is arranged on the workbench and located on one side of the turntable. The connecting rod unloading mechanism is used to move the crankshaft connecting rod on which the bushing is pressed out of the workbench.

[0007] Through the above technical features, when in use, the crankshaft connecting rod to be press-fitted with the bushing is automatically placed on the placement position on the turntable on the workbench. At the same time, the bushing feeding mechanism transports the bushings one by one to the top of the turntable, and ensures that the U-shaped groove of the bushing is in a preset angle direction through rotational positioning so that the lubricating oil can enter smoothly. When the turntable rotates to the bottom of the bushing pressing mechanism, the bushing feeding mechanism has sleeved the bushing after rotational positioning on the lower end of the pressure rod. At this time, the bushing pressing mechanism starts, driving the pressure rod to move downward, and accurately presses the bushing into the piston pin hole of the crankshaft connecting rod located in the placement position. After the bushing is pressed, the turntable continues to rotate to the connecting rod unloading mechanism, and the connecting rod unloading mechanism automatically removes the crankshaft connecting rod that has been pressed from the workbench for subsequent processing or packaging.

[0008] Therefore, the automatic bushing press machine of the present application greatly shortens the press-fitting time, improves production efficiency, and speeds up production through automated operation. Moreover, the automated press-fitting process is more stable and reliable, and can ensure that each bushing is accurately pressed into the piston pin hole of the crankshaft connecting rod, reducing press-fitting quality problems caused by improper manual operation. In addition, the automated press-fitting process can ensure that the press-fitting quality of the bushings of each crankshaft connecting rod is consistent, thereby improving the overall quality and consistency of the product.

[0009] Preferably, the connecting rod feeding mechanism comprises: A feeding conveying assembly, comprising a conveying frame, the conveying frame is arranged on the workbench and extends toward a side close to the turntable, the conveying frame is used for sequentially placing the crankshaft connecting rods in a vertical state in parallel, and the feeding conveying assembly sequentially conveys the crankshaft connecting rods toward a side close to the turntable; A flip assembly is arranged at one end of the conveying frame close to the turntable, and the flip mechanism is used to flip the crankshaft connecting rod moved to the end of the conveying frame close to the turntable from a vertical state to a horizontal state; The loading robot assembly is arranged between the flipping mechanism and the turntable. The loading robot assembly is used to grab the crankshaft connecting rod placed horizontally on the flipping assembly, and move it to place it horizontally on the placement position of the turntable close to the flipping assembly.

[0010] Through the above technical features, the feeding conveying assembly conveys the crankshaft connecting rods one by one to the flipping assembly. The flipping assembly flips the crankshaft connecting rods from the vertical state to the horizontal state through precise control, ensuring the horizontality of the crankshaft connecting rods after flipping. The feeding manipulator assembly accurately grabs the flipped crankshaft connecting rods, moves the connecting rods to the designated placement position on the turntable close to the flipping assembly, and places them steadily to ensure the accuracy of the placement of the crankshaft connecting rods. Therefore, the feeding conveying assembly of the present application reduces the errors and damages caused by human factors through the automated flipping and feeding process, improves the placement accuracy and consistency of the crankshaft connecting rods, and thus improves the product quality.

[0011] Preferably, the loading conveying assembly further comprises a guide rod, a slide groove, a lifting unit and a driving unit, the guide rod being arranged on both sides of the upper end of the conveying frame along the length direction, the slide groove being arranged in parallel below the guide rod, the guide rod being used to abut against the lower end of the large end of the crankshaft connecting rod, the slide groove being used to abut against the lower end of the small end of the crankshaft connecting rod, the driving unit being connected below the slide groove and connected to the conveying frame, and being used to drive the slide groove to move back and forth along the length direction of the conveying frame, the lifting unit being connected below the slide groove and connected to the conveying frame, and being used to drive the slide groove to move up and down; When the driving unit drives the slide slot to move toward the side close to the turntable, the lifting unit drives the slide slot to move upward and abut against the lower end of the crankshaft connecting rod; when the driving unit drives the slide slot to move away from the turntable, the lifting unit drives the slide slot to move downward and away from the lower end of the crankshaft connecting rod.

[0012] Through the above technical features, when the crankshaft connecting rod is placed on the conveying frame, the driving unit starts to work and drives the slide to move toward the side close to the turntable. At the same time, the lifting unit also drives the slide to rise, so that the slide rests against the lower end of the small end of the crankshaft connecting rod to provide support. As the driving unit continues to work, the slide and the crankshaft connecting rod move toward the turntable together; when the crankshaft connecting rod is conveyed to the flip assembly, the driving unit works in the opposite direction and drives the slide to move away from the turntable. At this time, the lifting unit drives the slide to descend, so that the slide is away from the lower end of the crankshaft connecting rod and no longer provides support. Therefore, when the driving unit drives the slide to move away from the turntable, it will not drive the crankshaft connecting rod to move away from the turntable together, so that the crankshaft connecting rod is sent to the flip assembly in sequence through the reciprocating movement of the slide driven by the driving unit.

[0013] Preferably, the driving unit includes a fixed plate, a pull rod, an eccentric turntable and a driving element, the fixed plate is connected to the lower end of the slide slot, the pull rod is connected to the end of the fixed plate away from the slide slot, the eccentric turntable is connected to the end of the pull rod away from the fixed plate, and the pull rod is connected to one side of the eccentric turntable, the driving element is transmission-connected to the eccentric turntable, the driving element is used to drive the eccentric turntable to rotate, and the driving element is connected to the conveying frame through a fixed frame.

[0014] Through the above-mentioned technical features, when the driving element is started, it drives the eccentric turntable to rotate. The rotation of the eccentric turntable causes the pull rod connected to one side of it to produce reciprocating linear motion. The linear motion of the pull rod is transmitted to the slide slot through the fixed plate, driving the slide slot to move back and forth along the length direction of the conveyor frame, thereby realizing reciprocating feeding of the crankshaft connecting rod.

[0015] Preferably, the flip assembly comprises: The adjusting unit comprises an adjusting frame, a first limiting element, a second limiting element, and a pushing element arranged at the end of the conveying frame, the adjusting frame is provided with an adjusting track, the adjusting track is inclined downward toward an end away from the conveying frame, the crankshaft connecting rod at the end of the conveying frame enters the adjusting track in turn and slides to the end of the adjusting track, the first limiting element comprises a first driving member and a blocking piece, the first driving member is connected to the adjusting frame, the blocking piece is connected to the output end of the first driving member, the first driving member drives the blocking piece to move back and forth toward or away from the upper end direction of the end of the adjusting track, thereby limiting the upper end of the large end of the crankshaft connecting rod at the end of the adjusting track in the adjusting track or releasing the limitation on the large end of the crankshaft connecting rod, the second limiting element comprises a second driving member and a fixed fork, the first ... The second driving member is connected to the adjusting frame, the fixed fork is connected to the output end of the second driving member, the second driving member drives the fixed fork to move back and forth in the direction close to or away from the rod body of the crankshaft connecting rod, so as to limit the rod body of the crankshaft connecting rod at the end of the adjusting track within the adjusting track or release the limit on the rod body of the crankshaft connecting rod, the pushing element comprises a third driving member and a pushing fork, the third driving member is connected to the second driving member, the second driving member drives the third driving member to move back and forth in the direction close to or away from the rod body of the crankshaft connecting rod, the pushing fork is connected to the output end of the third driving member, the pushing fork is located at the end of the adjusting track, and the third driving member is used to drive the pushing fork to move back and forth along the extension direction of the adjusting track toward or away from the end of the adjusting track; The turning unit includes a swing frame and a fifth driving member rotatably connected to the workbench, the swing frame being located between the adjusting frame and the turntable, the swing frame being provided with a tooling base plate, the upper end of the tooling base plate being provided with a first locating pin and a second locating pin, the first locating pin and the second locating pin respectively cooperating with the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod, the fourth driving member being connected to the tooling base plate, the fourth driving member being used to drive the tooling base plate to move back and forth in a direction close to or away from the end of the adjusting track, the swing frame swinging back and forth between the first position and the second position under the action of the fifth driving member; when the swing frame is in the first position, the swing frame is located on a side close to the turntable, and the tooling base plate is in a horizontal state; when the swing frame is in the second position, the swing frame is located on a side close to the adjusting frame, and the tooling base plate is in a vertical state.

[0016] Through the above technical features, the crankshaft connecting rod is sent into the adjustment track at the end of the conveyor frame. Since the adjustment track is inclined toward the end away from the conveyor frame, the crankshaft connecting rod will automatically slide to the end along the track, and the first driving member drives the baffle to move to limit the upper end of the large end of the crankshaft connecting rod. The second driving member drives the fixed fork to move to limit the rod body of the crankshaft connecting rod, and the crankshaft connecting rod at the end of the adjustment track is limited within the adjustment track. Then the fifth driving member drives the swing frame to rotate to a vertical state, and then the fourth driving member drives the tooling base plate to move toward the side close to the end of the adjustment track so that the first positioning pin and the second positioning pin on the tooling base plate are inserted into the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod at the end of the adjustment track. At this time, the first driving member drives the baffle to move to release the limit on the upper end of the large end of the crankshaft connecting rod, and the second driving member drives the fixed fork to move to release the limit on the rod body of the crankshaft connecting rod. While the second driving member drives the fixed plug-in to move, it will drive the pushing element to move synchronously in the direction away from the rod body of the crankshaft connecting rod. Afterwards, the fourth driving member drives the tooling base plate to move a certain distance away from the end of the adjustment track, so that the crankshaft connecting rod at the end of the adjustment track moves out of the adjustment track, and the crankshaft connecting rod behind it moves to the end of the adjustment track. Under the abutment of the tooling base plate and the crankshaft connecting rod behind it, the crankshaft connecting rod that moves out of the end of the adjustment track will not fall off from the tooling base plate, and will remain behind the tooling base plate and the crankshaft connecting rod at the end of the adjustment track. Afterwards, the second driving member drives the fixed fork to move, and the fixed fork and the push fork are both inserted between the crankshaft connecting rod at the end of the adjustment track and the crankshaft connecting rod on the tooling base plate. At this time, the fixed fork limits the rod body of the crankshaft connecting rod at the end of the adjustment track to prevent the crankshaft connecting rod at the end of the adjustment track from falling off the adjustment track, and the push fork abuts against the rod body of the crankshaft connecting rod on the tooling base plate away from the tooling base plate. Afterwards, the fourth driving member drives the tooling base plate to continue moving toward the side away from the end of the adjusting track. At this time, the third driving member drives the push fork to move along the extension direction of the adjusting track toward the end away from the adjusting track, pushing the crankshaft connecting rod that has moved out of the end of the adjusting track to move synchronously with the tooling base plate, keeping the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod always sleeved in the first locating pin and the second locating pin of the tooling base plate. Because the tooling base plate is in a vertical device, it is necessary to push the push fork to push the crankshaft connecting rod against the tooling base plate so that the crankshaft connecting rod will not fall off the tooling base plate. At the same time, the first driving member drives the baffle to move, so that the baffle can limit the upper end of the large end of the crankshaft connecting rod located at the end of the adjusting track.When the fourth driving member drives the tooling base plate to the side away from the end of the adjusting track until it is close to the swing frame, the fifth driving member drives the swing frame to rotate to a horizontal position. While the swing frame rotates, the third driving member drives the push fork to move along the extension direction of the adjusting track toward the end of the adjusting track to avoid interference with the rotation of the swing frame. When the swing frame rotates to a horizontal state, the tooling base plate on the swing frame is in a horizontal state, that is, the crankshaft connecting rod on the tooling base plate is in a horizontal state, completing the flipping of the crankshaft connecting rod from a vertical state to a horizontal state, ensuring the horizontality of the crankshaft connecting rod, thereby ensuring the concentricity of the bushing and the piston pin hole on the crankshaft connecting rod when the bushing is pressed. The pressing effect of the bushing is ensured.

[0017] Preferably, the bushing feeding mechanism comprises: A vibration plate, one end of which is close to the rotating plate and is connected to a first feeding channel; The conveyor belt is arranged on the material separation frame and extends to one side of the material feeding channel. The material separation frame is provided with a second material feeding channel. The two ends of the conveyor belt are respectively connected with the first feeding channel and the second feeding channel. The push block is arranged on the material separation frame and one end of the push block is provided with a receiving groove, the receiving groove is connected with the end of the second feeding channel, the receiving groove is used to receive the bushing moved to the end of the second feeding channel, one side of the push block is connected with a sixth driving member, the side of the material separation frame away from the push block is provided with a storage hole, the pressing unit is arranged above the storage hole, the sixth driving member is used to drive the push block to move toward the side close to the storage hole, so as to move the bushing in the receiving groove to the top of the storage hole and drop it into the storage hole, and the pressing unit is used to push the bushing in the storage hole to move downward; The loading moving assembly includes a moving frame, a first moving unit, a second moving unit, a moving base plate, a three-jaw chuck, a seventh driving member and an eighth driving member, wherein the moving frame is arranged on the workbench, the first moving unit is connected to the workbench, the second moving unit is connected to the first moving unit, and the moving base plate is connected to the second moving unit, the first moving unit is used to drive the moving base plate to move back and forth between the pressure rod and the storage hole, the second moving unit is used to drive the moving base plate to move back and forth in the direction close to or away from the lower end of the pressure rod, the three-jaw chuck is rotatably connected to the moving base plate, the three-jaw chuck is used to clamp a bushing that falls from the storage hole, the seventh driving member is used to drive the three-jaw chucks to move closer to or away from each other, thereby clamping or releasing the bushing, and the eighth driving member is used to drive the three-jaw chuck to rotate, thereby positioning the bushing so that the U-shaped groove on the bushing is in a preset position.

[0018] Through the above technical features, the vibration plate arranges the bushings in order and conveys them to the first feeding channel through vibration. The bushings in the first feeding channel are conveyed to the second feeding channel through the conveyor belt. When the bushings move to the end of the second feeding channel, the push block is driven by the sixth driving member to move forward to the end of the second feeding channel, so that the bushings enter the receiving groove. The bushings in the receiving groove are pushed to the top of the storage hole and fall into the storage hole due to gravity. When the first moving unit drives the moving bottom plate to move to the bottom of the storage hole, the three-jaw chuck is located at the lower end of the discharge hole, and then the pressing unit pushes the bushings in the storage hole to move downward to the center of the three-jaw chuck. At the same time, the seventh driving member drives the three-jaw chucks to move closer to each other to clamp the bushings. Afterwards, the first movable unit drives the movable base plate to move to the bottom of the pressure rod, and then the eighth driving member is used to drive the three-jaw chuck to rotate to rotationally position the bushing. When the bushing rotates to a predetermined position, the second movable unit is used to drive the movable base plate to move toward the lower end of the pressure rod, thereby putting the bushing on the lower end of the pressure rod to complete the loading and rotational positioning of the bushing.

[0019] Preferably, the bushing pressing mechanism also includes a column, a ninth driving member, a slide, a pressure sensor and a displacement sensor. The column is connected to the workbench and is located on one side of the turntable. The column is provided with a slide rail which extends vertically for convenience. The slide is slidably connected to the slide rail. The pressure rod is connected to the lower end of the slide. The ninth driving member is arranged at the upper end of the column. The pressure sensor is connected to the output end of the ninth driving member. The lower end of the pressure sensor is connected to the slide. The displacement sensor is connected between the slide and the column.

[0020] Through the above-mentioned technical features, when the pressure rod presses the bushing, the ninth driving member drives the slide to move toward the crankshaft connecting rod placed on the workbench, and presses the bushing at the lower end of the pressure rod into the piston pin hole of the crankshaft connecting rod. Through real-time monitoring by the pressure sensor and the displacement sensor, the pressing force and depth can be accurately controlled to ensure a close fit between the bushing and the part to be pressed, thereby improving the pressing accuracy.

[0021] Preferably, a connecting rod tooling is provided on the placement position, and a large-end locating pin and a small-end locating pin are provided on the connecting rod tooling, and the small-end locating pin can move up and down relative to the connecting rod tooling.

[0022] Through the above technical features, when the pressure rod is pressed into the piston pin hole of the crankshaft connecting rod, the small end piston located in the piston pin hole moves downward, making it convenient for the pressure rod to be completely pressed into the piston pin hole, thereby pressing the bushing into the piston pin hole.

[0023] Preferably, a shrink sleeve is provided above the small-end locating pin, and the shrink sleeve is connected to the column.

[0024] Through the above technical features, in order to press-fit the directional bushing, a gap extending in the axial direction is provided on the outer peripheral wall of the bushing in the present application. When the bushing is sleeved on the lower end of the pressure rod, the bushing and the lower end of the pressure rod are interference-fitted. When the pressure rod drives the bushing to pass through the shrink sleeve, under the action of the shrink sleeve, the gap on the bushing is deformed, the diameter of the bushing becomes smaller, and the interference between the bushing and the pressure rod becomes larger. Then the pressure rod drives the bushing to insert into the piston pin hole of the crankshaft connecting rod. The bushing and the piston pin hole are interference-fitted. Then the ninth driving member drives the pressure rod to move upward, and the bushing is press-fitted into the piston pin hole.

[0025] Preferably, the connecting rod unloading mechanism includes a unloading conveying assembly and a unloading robot assembly, the unloading robot assembly includes a unloading robot, the unloading robot is used to grab the crankshaft connecting rod with the bushing pressed on the placement position, one side of the unloading robot is connected to a rotating cylinder, the rotating cylinder is used to drive the unloading robot to rotate, thereby rotating the crankshaft connecting rod on the robot from a horizontal state to a vertical state, and placing the crankshaft connecting rod vertically on the unloading conveying assembly, and the unloading conveying assembly moves the crankshaft connecting rod with the bushing pressed out of the workbench.

[0026] Through the above-mentioned technical features, the unloading robot grabs the crankshaft connecting rod with the bushing pressed and placed in the placement position, and then the rotating cylinder is used to drive the unloading robot to rotate, thereby rotating the crankshaft connecting rod on the unloading robot from a horizontal state to a vertical state, and then placing it on the unloading conveying assembly, and the unloading conveying assembly moves the crankshaft connecting rod out of the workbench.

[0027] In summary, this application has the following beneficial effects: (1) The present application significantly shortens the press-fitting time, improves production efficiency, and speeds up production through automated operation. The automated press-fitting process is more stable and reliable, ensuring that each bushing is accurately pressed into the piston pin hole of the crankshaft connecting rod, reducing press-fitting quality problems caused by improper manual operation. The automated press-fitting process can ensure that the press-fitting quality of the bushing of each crankshaft connecting rod is consistent, thereby improving the overall quality and consistency of the product. (2) The connecting rod feeding mechanism of the present application reduces errors and damage caused by human factors through the automated flipping and feeding process, improves the placement accuracy and consistency of the crankshaft connecting rod, and thus improves product quality; (3) The bushing feeding mechanism of the present application effectively improves production efficiency, reduces labor intensity, and ensures product positioning accuracy and production safety through highly automated and precise control methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the crankshaft connecting rod; Figure 2 is a schematic diagram of the structure of the bushing; Figure 3 The overall structure of an embodiment of the present application is shown in FIG. Figure 1 ; Figure 4 The overall structure of an embodiment of the present application is shown in FIG. Figure 2 ; Figure 5 This is a schematic diagram of the structure of a turntable according to an embodiment of the present application; Figure 6 This is a schematic structural diagram of a connecting rod feeding mechanism according to an implementation scheme of the present application; Figure 7 This is a schematic structural diagram of a loading and conveying assembly according to an embodiment of the present application; Figure 8 A schematic diagram of the structure of a flip assembly according to an embodiment of the present application Figure 1 ; Fig. 9 A schematic diagram of the structure of a flip assembly according to an embodiment of the present application Figure 2 ; Fig.10 A schematic diagram of the structure of a flip assembly according to an embodiment of the present application Figure 3 ; Fig.11 A schematic diagram of the structure of a flip assembly according to an embodiment of the present application Figure 4 ; Fig.12 This is a schematic diagram of the structure of a loading robot assembly according to an embodiment of the present application; Fig.13 This is a structural schematic diagram of a bushing feeding mechanism according to an embodiment of the present application; Fig.14 This is a schematic structural diagram of a bushing spacer assembly according to an embodiment of the present application; Fig.15 This is a schematic structural diagram of a loading and moving assembly according to an embodiment of the present application; Fig.16 This is a structural schematic diagram of a bushing press-fitting mechanism according to an embodiment of the present application; Fig.17 This is a schematic structural diagram of a connecting rod unloading mechanism according to an implementation scheme of the present application.

[0029] In the figure, 1, crankshaft connecting rod; 11, rod body; 12, small end; 121, piston pin hole; 13, large end; 131, crankshaft pin hole; 2, bushing; 21, U-shaped groove; 22, gap; 3, workbench; 31, protective cover; 32, controller; 4, turntable; 41, placement position; 42, connecting rod tooling; 421, large end positioning pin; 422, small end positioning pin; 43, loading position; 44, press-fitting position; 45, unloading position; 5, connecting rod loading mechanism; 51, loading conveying assembly; 511, conveying frame; 512, guide rod; 513, slide; 514, lifting unit; 51 5. Driving unit; 5151. Fixed plate; 5152. Pull rod; 5153. Eccentric turntable; 5154. Driving element; 5155. Fixed frame; 52. Turnover assembly; 521. Adjusting unit; 5211. Adjusting frame; 52111. Adjusting track; 5212. First limiting element; 52121. First driving member; 52122. Blocking piece; 5213. Second limiting element; 52131. Second driving member; 52132. Fixed fork; 5214. Pushing element; 52141. Third driving member; 52142. Pushing fork; 522. Turnover unit; 5221, swing frame; 5222, fifth driving member; 5223, tooling bottom plate; 5224, first positioning pin; 5225, second positioning pin; 5226, fourth driving member; 53, loading robot assembly; 531, loading rack; 532, loading robot; 533, clamping claw; 6, bushing loading mechanism; 61, vibration plate; 611, first feeding channel; 62, bushing spacer assembly; 621, spacer rack; 6211, storage hole; 622, conveyor belt; 623, push block; 6231, accommodating groove; 624, pressing unit; 625, second feeding channel; 626, first Six driving members; 63, loading moving assembly; 631, moving frame; 632, first moving unit; 633, second moving unit; 634, moving base plate; 635, three-jaw chuck; 636, seventh driving member; 637, eighth driving member; 7, bushing pressing mechanism; 71, pressure rod; 72, ninth driving member; 73, slide seat; 74, pressure sensor; 75, displacement sensor; 76, column; 761, slide rail; 77, shrink sleeve; 8, connecting rod unloading mechanism; 81, unloading conveying assembly; 82, unloading manipulator assembly; 821, unloading manipulator; 822, rotating cylinder. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present application and combined with the accompanying drawings to further describe the technical solution of the present application, but the present application is not limited to these embodiments.

[0031] like Figure 3 , Figure 4As shown, the present application discloses an automatic bushing press for a crankshaft connecting rod, comprising: an automatic bushing press for a crankshaft connecting rod, comprising: a workbench 3, a protective cover 31 is provided on the periphery of the workbench 3, and a controller 32 is provided on the protective cover 31.

[0032] A turntable 4, a connecting rod loading mechanism 5, a bushing loading mechanism 6, a bushing pressing mechanism 7 and a connecting rod unloading mechanism 8 are installed on the workbench 3. A number of placement positions 41 are evenly spaced around the turntable 4. The connecting rod loading mechanism 5 places the crankshaft connecting rod 1 to be pressed with the bushing 2 on the placement position 41. The bushing loading mechanism 6 transports the bushing 2 to the top of the turntable 4 and rotationally positions the bushing 2. The bushing loading mechanism 6 sleeves the rotated and positioned bushing 2 on the lower end of the pressing rod 71. The bushing pressing mechanism 7 drives the pressing rod 71 to press the bushing 2 into the piston pin hole 121 on the crankshaft connecting rod 1 at the placement position 41. The connecting rod unloading mechanism 8 moves the crankshaft connecting rod 1 on which the bushing 2 is pressed out of the workbench 3.

[0033] like Figure 5 As shown, the turntable 4 in the present application is provided with four placement positions 41, including a loading position 43, a pressing position 44 and a unloading position 45, and one placement position 41 is unused and can be used for a detection position after pressing, which can be used as a subsequent function extension need.

[0034] A connecting rod fixture 42 is provided on each placement position 41, and a large end positioning pin 421 and a small end positioning pin 422 are provided on the connecting rod fixture 42. When the crankshaft connecting rod 1 is placed horizontally on the placement position 41, the large end positioning pin 421 and the small end positioning pin 422 are respectively inserted into the crankshaft pin hole 131 and the piston pin hole 121 of the crankshaft connecting rod 1, and the crankshaft connecting rod 1 on the placement position 41 is positioned to prevent the position of the crankshaft connecting rod 1 from moving back and forth during the press-fitting process. In addition, the small end positioning pin 422 can move up and down relative to the connecting rod fixture 42. In this application, an elastic member is connected to the lower end of the small end positioning pin 422. When the pressure rod 71 drives the bushing 2 to be inserted into the piston pin hole 121 of the crankshaft connecting rod 1, the small end positioning pin 422 moves downward to avoid the pressure rod 71.

[0035] like Figure 6 As shown, the connecting rod feeding mechanism 5 of the present application includes a feeding conveying assembly 51, a flipping assembly 52 and a feeding robot assembly 53. The feeding conveying assembly 51 conveys the crankshaft connecting rod 1 in a vertical state to one side of the flipping assembly 52 in sequence. The flipping assembly 52 flips the crankshaft connecting rod 1 at the end of the feeding conveying assembly 51 from a vertical state to a horizontal state. The feeding robot assembly 53 is used to grab the crankshaft connecting rod 1 placed horizontally on the flipping assembly 52, and move it to a horizontal position 43 on the turntable 4.

[0036] In the present application, the feeding and conveying assembly 51 feeds the crankshaft connecting rod 1 in a vertical state, which reduces the space occupied by the crankshaft connecting rod 1 during feeding and improves the conveying efficiency of the crankshaft connecting rod. Since the crankshaft connecting rod 1 is in a horizontal state when the bushing 2 is pressed, in order to ensure the coaxiality of the bushing 2 and the piston pin hole 121 during the sleeve pressing process, the crankshaft connecting rod 1 is flipped by the flipping assembly 52 to ensure the horizontality of the crankshaft connecting rod 1 after flipping.

[0037] like Figure 7 As shown, the feeding conveying assembly 51 of the present application also includes a conveying frame 511, guide rods 512 are arranged on both sides of the upper end of the conveying frame 511 along the length direction, and the slide groove 513 is arranged in parallel below the guide rod 512, the guide rod 512 is used to abut against the lower end of the large end 13 of the crankshaft connecting rod 1, and the slide groove 513 is used to abut against the lower end of the small end 12 of the crankshaft connecting rod 1, the driving unit 515 is connected to the bottom of the slide groove 513 and connected to the conveying frame 511, and is used to drive the slide groove 513 to move back and forth along the length direction of the conveying frame 511, and the lifting unit 514 is connected to the bottom of the slide groove 513 and connected to the conveying frame 511, and is used to drive the slide groove 513 to move up and down.

[0038] When the crankshaft connecting rod 1 is placed on the conveying frame 511, the driving unit 515 starts to work, driving the slide 513 to move toward the side close to the turntable 4. At the same time, the lifting unit 514 also drives the slide 513 to rise, so that the slide 513 abuts against the lower end of the small end 12 of the crankshaft connecting rod 1 to provide support. As the driving unit 515 continues to work, the slide 513 and the crankshaft connecting rod 1 move toward the turntable 4 together; when the crankshaft connecting rod 1 is conveyed to the flip assembly 52, the driving unit 515 works in the reverse direction, driving the slide 513 to move away from the turntable 4. At this time, the lifting unit 514 drives the slide groove 513 to descend, so that the slide groove 513 is away from the lower end of the crankshaft connecting rod 1 and no longer provides support. Therefore, when the driving unit 515 drives the slide groove 513 to move away from the turntable 4, it will not drive the crankshaft connecting rod 1 to move away from the turntable 4. Therefore, the driving unit 515 drives the reciprocating movement of the slide groove 513 to send the crankshaft connecting rod 1 to the flip assembly 52 in sequence.

[0039] The driving unit 515 in the present application includes a fixed plate 5151, a pull rod 5152, an eccentric turntable 5153, and a driving element 5154. The fixed plate 5151 is connected to the lower end of the slide slot 513, the pull rod 5152 is connected to the end of the fixed plate 5151 away from the slide slot 513, the eccentric turntable 5153 is connected to the end of the pull rod 5152 away from the fixed plate 5151, and the pull rod 5152 is connected to one side of the eccentric turntable 5153, the driving element 5154 is connected to the eccentric turntable 5153 in transmission connection, the driving element 5154 is used to drive the eccentric turntable 5153 to rotate, and the driving element 5154 is connected to the conveying frame 511 through the fixed frame 5155.

[0040] The driving element 5154 is started, driving the eccentric turntable 5153 to rotate. The rotation of the eccentric turntable 5153 causes the pull rod 5152 connected to one side thereof to produce reciprocating linear motion. The linear motion of the pull rod 5152 is transmitted to the slide groove 513 through the fixed plate 5151, driving the slide groove 513 to move back and forth along the length direction of the conveying frame 511, thereby realizing reciprocating feeding of the crankshaft connecting rod 1.

[0041] like Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the flip assembly 52 of the present application includes an adjustment unit 521 and a flip unit 522 .

[0042] The adjusting unit 521 includes an adjusting frame 5211, a first limiting element 5212, a second limiting element 5213, and a pushing element 5214, which are arranged at the end of the conveying frame 511. An adjusting track 52111 is arranged on the adjusting frame 5211, and the adjusting track 52111 is tilted downward toward the end away from the conveying frame 511. The crankshaft connecting rod 1 at the end of the conveying frame 511 enters the adjusting track 52111 in turn and slides to the end of the adjusting track 52111. The first limiting element 5212 includes a first driving member 52121 and a baffle 52122. The first driving member 52121 is connected to the adjusting frame 5211, and the baffle 52122 is connected to the output of the first driving member 52121. The first driving member 52121 drives the blocking piece 52122 to move back and forth toward or away from the upper end of the end of the adjusting track 52111, thereby limiting the upper end of the large end 13 of the crankshaft connecting rod 1 at the end of the adjusting track 52111 within the adjusting track 52111 or releasing the limitation of the large end 13 of the crankshaft connecting rod 1; the second limiting element 5213 includes a second driving member 52131 and a fixed fork 52132, the second driving member 52131 is connected to the adjusting frame 5211, and the fixed fork 52132 2132 is connected to the output end of the second driving member 52131, and the second driving member 52131 drives the fixed fork 52132 to move back and forth in the direction of approaching or moving away from the rod body 11 of the crankshaft connecting rod 1, so as to limit the rod body 11 of the crankshaft connecting rod 1 at the end of the adjusting track 52111 in the adjusting track 52111 or release the limit on the rod body 11 of the crankshaft connecting rod 1; the pushing element 5214 includes a third driving member 52141 and a pushing fork 52142, and the third driving member 52141 is connected to the first The second driving member 52131 on the second driving member 52131 drives the third driving member 52141 to move back and forth toward or away from the rod body 11 of the crankshaft connecting rod 1, and the pushing fork 52142 is connected to the output end of the third driving member 52141, and the pushing fork 52142 is located at the end of the adjusting track 52111. The third driving member 52141 is used to drive the pushing fork 52142 to move back and forth along the extension direction of the adjusting track 52111 toward or away from the end of the adjusting track 52111.

[0043] The turning unit 522 includes a swing frame 5221 and a fifth driving member 5222 which are rotatably connected to the workbench 3. The swing frame 5221 is located between the adjusting frame 5211 and the rotating disk 4. A tooling base plate 5223 is provided on the swing frame 5221. A first positioning pin 5224 and a second positioning pin 5225 are provided on the upper end of the tooling base plate 5223. The first positioning pin 5224 and the second positioning pin 5225 are respectively matched with the piston pin hole 121 and the crankshaft pin hole 131 of the crankshaft connecting rod 1. A fourth driving member 5226 is connected to the tooling base plate 5223. The moving member 5226 is used to drive the tooling base plate 5223 to move back and forth toward or away from the end of the adjusting track 52111, and the swing frame 5221 swings back and forth between the first position and the second position under the action of the fifth driving member 5222; when the swing frame 5221 is in the first position, the swing frame 5221 is located on the side close to the turntable 4, and the tooling base plate 5223 is in a horizontal state; when the swing frame 5221 is in the second position, the swing frame 5221 is located on the side close to the adjusting frame 5211, and the tooling base plate 5223 is in a vertical state.

[0044] The crankshaft connecting rod 1 is fed into the adjusting track 52111 at the end of the conveying frame 511. Since the adjusting track 52111 is inclined toward the end away from the conveying frame 511, the crankshaft connecting rod 1 will automatically slide to the end along the track. The first driving member 52121 drives the baffle 52122 to move, thereby limiting the upper end of the large end 13 of the crankshaft connecting rod 1. The second driving member 52131 drives the fixed fork 52132 to move, thereby limiting the rod body 11 of the crankshaft connecting rod 1, and limiting the crankshaft connecting rod 1 at the end of the adjusting track 52111 within the adjusting track 52111. Then the fifth driving member 5222 drives the swing frame 5221 to rotate to a vertical state, and then the fourth driving member 5226 drives the tooling base plate 5223 to move toward the side close to the end of the adjusting track 52111 so that the first locating pin 5224 and the second locating pin 5225 on the tooling base plate 5223 are inserted into the piston pin hole 121 and the crankshaft pin hole 131 of the crankshaft connecting rod 1 located at the end of the adjusting track 52111. At this time, the first driving member 52121 drives the baffle 52122 to move, and releases the limit on the upper end of the large end 13 of the crankshaft connecting rod 1. The second driving member 52131 drives the fixed fork 52132 to move, and releases the limit on the rod body 11 of the crankshaft connecting rod 1. While the second driving member 52131 drives the fixed plug-in to move, it will drive the pushing element 5214 to move synchronously in the direction away from the rod body 11 of the crankshaft connecting rod 1. Afterwards, the fourth driving member 5226 drives the tooling base plate 5223 to move a certain distance to the side away from the end of the adjusting track 52111, so that the crankshaft connecting rod 1 located at the end of the adjusting track 52111 moves out of the adjusting track 52111, and the crankshaft connecting rod 1 located behind it moves to the end of the adjusting track 52111. Under the abutment action of the tooling base plate 5223 and the crankshaft connecting rod 1 located behind it, the crankshaft connecting rod 1 moved out of the end of the adjusting track 52111 will not fall off the tooling base plate 5223, and will remain behind the tooling base plate 5223 and the crankshaft connecting rod 1 located at the end of the adjusting track 52111. Afterwards, the second driving member 52131 drives the fixed fork 52132 to move, and the fixed fork 52132 and the pushing fork 52142 are both inserted between the crankshaft connecting rod 1 located at the end of the adjusting track 52111 and the crankshaft connecting rod 1 located on the tooling base plate 5223. At this time, the fixed fork 52132 limits the rod body 11 of the crankshaft connecting rod 1 located at the end of the adjusting track 52111 to prevent the crankshaft connecting rod 1 located at the end of the adjusting track 52111 from falling off the adjusting track 52111, and pushes the fork 52142 against the rod body 11 of the crankshaft connecting rod 1 on the tooling base plate 5223 away from the tooling base plate 5223.Then, the fourth driving member 5226 drives the tooling base plate 5223 to continue to move away from the end of the adjusting track 52111. At this time, the third driving member 52141 drives the push fork 52142 to move away from the end of the adjusting track 52111 along the extension direction of the adjusting track 52111, pushing the crankshaft connecting rod 1 that has moved out of the end of the adjusting track 52111 to move synchronously with the tooling base plate 5223, keeping the piston pin hole 121 and the crankshaft pin hole 131 of the crankshaft connecting rod 1 always sleeved on the tooling base plate 5223. In the first positioning pin 5224 and the second positioning pin 5225 on 223, because the tooling base plate 5223 is in a vertical device, it is necessary to push the fork 52142 to push the crankshaft connecting rod 1 against the tooling base plate 5223, so that the crankshaft connecting rod 1 will not fall off from the tooling base plate 5223. At the same time, the first driving member 52121 drives the baffle 52122 to move, so that the baffle 52122 can limit the upper end of the large end 13 of the crankshaft connecting rod 1 located at the end of the adjustment track 52111. When the fourth driving member 5226 drives the tooling base plate 5223 to move away from the end of the adjusting rail 52111 until it is close to the swing frame 5221, the fifth driving member 5222 drives the swing frame 5221 to rotate to a horizontal position. While the swing frame 5221 rotates, the third driving member 52141 drives the pushing fork 52142 to move along the extension direction of the adjusting rail 52111 toward the end of the adjusting rail 52111 to avoid interference with the rotation of the swing frame 5221. When the swing frame 5221 rotates to a horizontal state, the tooling base plate 5223 on the swing frame 5221 is in a horizontal state, that is, the crankshaft connecting rod 1 on the tooling base plate 5223 is in a horizontal state, completing the flipping of the crankshaft connecting rod 1 from a vertical state to a horizontal state, ensuring the horizontality of the crankshaft connecting rod 1, thereby ensuring the concentricity of the bushing 2 and the piston pin hole 121 on the crankshaft connecting rod 1 when the bushing 2 is pressed.

[0045] like Fig.12 As shown, the loading robot assembly 53 of the present application includes a loading frame 531, to which a loading robot 532 is connected, and a clamp 533 is connected at the lower end of the loading robot 532. The clamp 533 is used to grab the crankshaft connecting rod 1 placed horizontally on the flipping assembly 52, and the clamp 533 is moved by the loading robot 532 and placed horizontally on the placement position 41 of the turntable 4.

[0046] like Fig.13 As shown, combined with the attached Figure 4The bushing feeding mechanism 6 includes a vibration plate 61, a bushing spacer assembly 62 and a feeding moving assembly 63. One end of the vibration plate 61 is connected to a first feeding channel 611. The bushings 2 in the first feeding channel 611 are fed into the feeding moving assembly 63 one by one through the bushing spacer assembly 62. The feeding moving assembly 63 moves the bushing 2 to the bottom of the pressure rod 71 to rotate and position the bushing 2. After rotation and positioning, the bushing 2 is mounted on the lower end of the pressure rod 71 to press the bushing 2.

[0047] like Fig.14 As shown, the bushing spacer assembly 62 includes a spacer frame 621, a conveyor belt 622, a push block 623, and a pressing unit 624. The spacer frame 621 is arranged between the first feeding channel 611 and the turntable 4. The conveyor belt 622 is arranged on the spacer frame 621 and extends to one side of the first feeding channel 611. The spacer frame 621 is provided with a second feeding channel 625. The two ends of the conveyor belt 622 are respectively connected to the first feeding channel 611 and the second feeding channel 625. The push block 623 is arranged on the spacer frame 621 and one end of the push block 623 is provided with a receiving groove 6231. The receiving groove 6231 is connected to the end of the second feeding channel 625. The accommodating groove 6231 is used to accommodate the sleeve 2 moved to the end of the second feeding channel 625. One side of the push block 623 is connected to the sixth driving member 626. The side of the material partition frame 621 away from the push block 623 is provided with a storage hole 6211. The pressing unit 624 is arranged above the storage hole 6211. The sixth driving member 626 is used to drive the push block 623 to move toward the side close to the storage hole 6211, thereby moving the sleeve 2 in the accommodating groove 6231 to the top of the storage hole 6211 and falling into the storage hole 6211. The pressing unit 624 is used to push the sleeve 2 in the storage hole 6211 to move downward.

[0048] like Fig.15As shown, the loading moving assembly 63 includes a moving frame 631, a first moving unit 632, a second moving unit 633, a moving bottom plate 634, a three-jaw chuck 635, a seventh driving member 636 and an eighth driving member 637. The moving frame 631 is arranged on the workbench 3, the first moving unit 632 is connected to the workbench 3, the second moving unit 633 is connected to the first moving unit 632, the moving bottom plate 634 is connected to the second moving unit 633, and the first moving unit 632 is used to drive the moving bottom plate 634 to move between the pressure rod 71 and the storage hole 6211. The third driving member 637 is used to drive the three-jaw chuck 635 to rotate, thereby positioning the bushing 2 so that the U-shaped groove 21 on the bushing 2 is in a preset position.

[0049] The vibration plate 61 arranges the bushings 2 in order and conveys them to the first feeding channel 611 through vibration. The bushings 2 in the first feeding channel 611 are conveyed to the second feeding channel 625 through the conveyor belt 622. When the bushings 2 move to the end of the second feeding channel 625, the push block 623 is driven by the sixth driving member 626 to move forward to the end of the second feeding channel 625, so that the bushings 2 enter the receiving groove 6231. The bushings 2 in the receiving groove 6231 are pushed to the top of the storage hole 6211 and fall into the storage hole 6211 due to gravity. When the first moving unit 632 drives the moving bottom plate 634 to move to the bottom of the storage hole 6211, the three-jaw chuck 635 is just located at the lower end of the discharge hole. Then, the pressing unit 624 pushes the bushings 2 in the storage hole 6211 to move downward to the center of the three-jaw chuck 635. At the same time, the seventh driving member 636 drives the three-jaw chuck 635 to approach each other and clamp the bushings 2. Afterwards, the first movable unit 632 drives the movable base plate 634 to move to the bottom of the pressure rod 71, and then the eighth driving member 637 is used to drive the three-jaw chuck 635 to rotate to rotationally position the bushing 2. When the bushing 2 rotates to a predetermined position, the second movable unit 633 is used to drive the movable base plate 634 to move toward the lower end of the pressure rod 71, thereby fitting the bushing 2 onto the lower end of the pressure rod 71 to complete the loading and rotational positioning of the bushing 2.

[0050] The seventh driving member 636 in the present application drives the three-jaw chuck 635 to move closer to and away from each other, which is equivalent to modifying the pneumatic drive in the pneumatic jaw cylinder to allow the seven driving members 636 to drive the three-jaw chuck 635 to move closer to and away from each other. The seven driving member 636 drives the three-jaw chuck 635 to move closer to and away from each other, eliminating the need for access to the cylinder in the pneumatic control, making it convenient for the eight driving member 637 to drive the three-jaw chuck 635 to rotate.

[0051] like Fig.15 As shown, combined with the attached Figure 2 The bushing pressing mechanism 7 of the present application further includes a column 76, a ninth driving member 72, a slide 73, a pressure sensor 74 and a displacement sensor 75. The column 76 is connected to the workbench 3 and is located on one side of the turntable 4. The column 76 is provided with a slide rail 761 extending vertically for convenience. The slide 73 is slidably connected to the slide rail 761. The pressure rod 71 is connected to the lower end of the slide 73. The ninth driving member 72 is arranged at the upper end of the column 76. The pressure sensor 74 is connected to the output end of the ninth driving member 72. The lower end of the pressure sensor 74 is connected to the slide 73. The displacement sensor 75 is connected between the slide 73 and the column 76. The column 76 is also connected with a shrink sleeve 77, which is located above the small end positioning pin 422.

[0052] In order to press-fit the bushing 2, the outer peripheral wall of the bushing 2 in the present application is provided with a gap 22 extending in the axial direction. When the bushing 2 is sleeved on the lower end of the pressure rod 71, the bushing 2 and the lower end of the pressure rod 71 are interference fit. When the pressure rod 71 presses the bushing 2, the ninth driving member 72 drives the slide 73 to move toward the crankshaft connecting rod 1 placed on the position 41 on the workbench 3. When the pressure rod 71 drives the bushing 2 to pass through the shrink sleeve 77, under the action of the shrink sleeve 77, the gap on the bushing 2 is deformed, the diameter of the bushing 2 is reduced, and the interference between the bushing 2 and the pressure rod 71 is increased. Then the pressure rod 71 drives the bushing 2 to insert into the piston pin hole 121 of the crankshaft connecting rod 1. The bushing 2 and the piston pin hole 121 are interference fit. Then the ninth driving member 72 drives the pressure rod 71 to move upward, and the bushing 2 is press-fitted into the piston pin hole 121.

[0053] like Fig.16 As shown, the connecting rod unloading mechanism 8 of the present application includes an unloading conveying assembly 81 and an unloading robot assembly 82. The unloading robot assembly 82 includes an unloading robot 821. The unloading robot 821 is used to grab the crankshaft connecting rod 1 on which the bushing 2 is pressed and placed in the placement position 41. A rotating cylinder 822 is connected to one side of the unloading robot 821. The rotating cylinder 822 is used to drive the unloading robot 821 to rotate, thereby rotating the crankshaft connecting rod 1 on the robot from a horizontal state to a vertical state, and placing the crankshaft connecting rod 1 vertically on the unloading conveying assembly 81. The unloading conveying assembly 81 moves the crankshaft connecting rod 1 on which the bushing 2 is pressed and out of the workbench 3.

[0054] The unloading robot 821 grabs the crankshaft connecting rod 1 on which the bushing 2 is pressed and placed on the placement position 41, and then the rotating cylinder 822 is used to drive the unloading robot 821 to rotate, thereby rotating the crankshaft connecting rod 1 on the unloading robot 821 from a horizontal state to a vertical state, and then placing it on the unloading conveying assembly 81, and the unloading conveying assembly 81 moves the crankshaft connecting rod 1 out of the workbench 3.

[0055] The structure of the unloading conveying assembly 81 in the present application is consistent with that of the loading conveying assembly 51 .

[0056] Working principle: When in use, the crankshaft connecting rod 1 to be press-fitted with the bushing 2 is automatically placed on the placement position 41 on the turntable 4 on the workbench 3. At the same time, the bushing feeding mechanism 6 transports the bushings 2 one by one to the top of the turntable 4, and ensures that the U-shaped groove 21 of the bushing 2 is in the preset angle direction through rotation positioning so that the lubricating oil can enter smoothly. When the turntable 4 rotates to the bottom of the bushing pressing mechanism 7, the bushing feeding mechanism 6 has sleeved the bushing 2 after rotation positioning on the lower end of the pressing rod 71. At this time, the bushing pressing mechanism 7 is started, driving the pressing rod 71 to move downward, and accurately press-fitting the bushing 2 into the piston pin hole 121 of the crankshaft connecting rod 1 located at the placement position 41. After the bushing 2 is pressed, the turntable 4 continues to rotate to the connecting rod unloading mechanism 8, and the connecting rod unloading mechanism 8 automatically removes the crankshaft connecting rod 1 that has been pressed from the workbench 3 for subsequent processing or packaging.

[0057] The specific embodiments described herein are merely examples of the present application. A person skilled in the art of the present application may make various modifications or additions to the specific embodiments described or replace them in a similar manner without departing from the scope defined in the present application.

Claims

1. An automatic bushing press for a crankshaft connecting rod, characterized in that: include: Workbench (3); A turntable (4) is arranged on the workbench (3), and a plurality of placement positions (41) are evenly spaced around the turntable (4), wherein the placement positions (41) are used to place crankshaft connecting rods; A connecting rod loading mechanism (5) is arranged on the workbench (3) and located on one side of the turntable (4), and the connecting rod loading mechanism (5) is used to place the crankshaft connecting rod to be press-fitted with a bushing on a placement position (41) of the workbench (3); A bushing feeding mechanism (6) is arranged on the workbench (3) and located on one side of the turntable (4), and the bushing feeding mechanism (6) is used to transport the bushing to the top of the turntable (4) and to perform rotational positioning on the bushing; A bushing press-fitting mechanism (7) is arranged on the workbench (3) and located on one side of the turntable (4). The bushing press-fitting mechanism (7) comprises a press rod (71). The press rod (71) is located above the placement position (41). The bushing feeding mechanism (6) sleeves the bushing after rotation and positioning onto the lower end of the press rod (71). The bushing press-fitting mechanism (7) is used to drive the press rod (71) to press the bushing into the piston pin hole on the crankshaft connecting rod at the placement position (41). A connecting rod unloading mechanism (8) is arranged on the workbench (3) and located on one side of the turntable (4). The connecting rod unloading mechanism (8) is used to move the crankshaft connecting rod on which the bushing is pressed out of the workbench (3).

2. The automatic bushing press for crankshaft connecting rod according to claim 1, characterized in that: The connecting rod feeding mechanism (5) comprises: A loading conveying assembly (51) comprises a conveying frame (511), wherein the conveying frame (511) is arranged on the workbench (3) and extends toward a side close to the turntable (4), wherein the conveying frame (511) is used for sequentially placing the crankshaft connecting rods in a vertical state in parallel, and the loading conveying assembly (51) sequentially conveys the crankshaft connecting rods toward a side close to the turntable (4); A turning assembly (52) is arranged at one end of the conveying frame (511) close to the turntable (4), and the turning mechanism is used to turn the crankshaft connecting rod moved to the end of the conveying frame (511) close to the turntable (4) from a vertical state to a horizontal state; A loading robot assembly (53) is arranged between the flipping mechanism and the turntable (4), and is used to grab the crankshaft connecting rod placed horizontally on the flipping assembly (52), and after moving, place it horizontally on a placement position (41) on the turntable (4) close to the flipping assembly (52).

3. The automatic bushing press for crankshaft connecting rod according to claim 2, characterized in that: The loading conveying assembly (51) also includes a guide rod (512), a slide groove (513), a lifting unit (514) and a driving unit (515), wherein the guide rod (512) is arranged on both sides of the upper end of the conveying frame (511) along the length direction, and the slide groove (513) is arranged in parallel below the guide rod (512), the guide rod (512) is used to abut against the lower end of the large end of the crankshaft connecting rod, and the slide groove (513) is used to abut against the lower end of the small end of the crankshaft connecting rod, the driving unit (515) is connected below the slide groove (513) and connected to the conveying frame (511), and is used to drive the slide groove (513) to move back and forth along the length direction of the conveying frame (511), and the lifting unit (514) is connected below the slide groove (513) and connected to the conveying frame (511), and is used to drive the slide groove (513) to move up and down; When the driving unit (515) drives the slide groove (513) to move toward the side close to the turntable (4), the lifting unit (514) drives the slide groove (513) to move upward and abut against the lower end of the crankshaft connecting rod; when the driving unit (515) drives the slide groove (513) to move toward the side away from the turntable (4), the lifting unit (514) drives the slide groove (513) to move downward and away from the lower end of the crankshaft connecting rod.

4. The automatic bushing press for crankshaft connecting rod according to claim 3, characterized in that: The driving unit (515) includes a fixed plate (5151), a pull rod (5152), an eccentric turntable (5153), and a driving element (5154), wherein the fixed plate (5151) is connected to the lower end of the slide slot (513), the pull rod (5152) is connected to one end of the fixed plate (5151) away from the slide slot (513), the eccentric turntable (5153) is connected to one end of the pull rod (5152) away from the fixed plate (5151), and the pull rod (5152) is connected to one side of the eccentric turntable (5153), the driving element (5154) is transmission-connected to the eccentric turntable (5153), and the driving element (5154) is used to drive the eccentric turntable (5153) to rotate, and the driving element (5154) is connected to the conveying frame (511) through a fixed frame (5155).

5. The automatic bushing press for crankshaft connecting rod according to claim 2, characterized in that: The flip assembly (52) comprises: The adjusting unit (521) comprises an adjusting frame (5211) arranged at the end of the conveying frame (511), a first limiting element (5212), a second limiting element (5213), and a pushing element (5214); an adjusting track (52111) is arranged on the adjusting frame (5211); the adjusting track (52111) is inclined downward toward an end away from the conveying frame (511); a crankshaft connecting rod at the end of the conveying frame (511) sequentially enters the adjusting track (52111) and slides to the end of the adjusting track (52111); the first limiting element (5212) comprises a first driving member (52121) and a baffle (52122), the first driving member (52121) is connected to the adjusting frame (5211), the baffle is connected to the output end of the first driving member (52121), the first driving member (52121) drives the baffle to move back and forth toward or away from the upper end of the end of the adjusting track (52111), thereby limiting the upper end of the large end of the crankshaft connecting rod at the end of the adjusting track (52111) within the adjusting track (52111) or releasing the limitation on the large end of the crankshaft connecting rod, the second limiting element (5213) includes a second driving member (52131) and a fixed fork (52132), The second driving member (52131) is connected to the adjustment frame (5211), and the fixed fork (52132) is connected to the output end of the second driving member (52131). The second driving member (52131) drives the fixed fork (52132) to move back and forth in the direction of approaching or moving away from the rod body of the crankshaft connecting rod, thereby limiting the rod body of the crankshaft connecting rod at the end of the adjustment track (52111) within the adjustment track (52111) or releasing the limit on the rod body of the crankshaft connecting rod. The pushing element (5214) includes a third driving member (52141) and a pushing fork (52142). The third driving member ( The third driving member (52141) is connected to the second driving member (52131), the second driving member (52131) drives the third driving member (52141) to move back and forth in a direction close to or away from the rod body of the crankshaft connecting rod, the pushing fork (52142) is connected to the output end of the third driving member (52141), the pushing fork (52142) is located at the end of the adjusting track (52111), and the third driving member (52141) is used to drive the pushing fork (52142) to move back and forth along the extension direction of the adjusting track (52111) towards or away from the end of the adjusting track (52111); The turning unit (522) comprises a swing frame (5221) and a fifth driving member (5222) which are rotatably connected to the workbench (3); the swing frame (5221) is located between the adjustment frame (5211) and the turntable (4); a tooling base plate (5223) is provided on the swing frame (5221); a first positioning pin (5224) and a second positioning pin (5225) are provided at the upper end of the tooling base plate (5223); the first positioning pin (5224) and the second positioning pin (5225) are respectively matched with the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod; a fourth driving member (5226) is connected to the tooling base plate (5223); the fourth driving member (5226) is connected to the crankshaft connecting rod; the fourth driving member (5226) is connected to the crankshaft connecting rod; the fourth driving member (5226) is connected to the crankshaft connecting rod; the first positioning pin (5224) and the second positioning pin (5225) are respectively matched with the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod; the first positioning pin (5224) and the second positioning pin (5225) are respectively matched with the piston pin hole and the crankshaft pin hole of the crankshaft connecting rod; the fourth driving member (5226) is connected to ... The member (5226) is used to drive the tooling base plate (5223) to move back and forth in a direction close to or away from the end of the adjustment track (52111), and the swing frame (5221) swings back and forth between the first position and the second position under the action of the fifth driving member (5222); when the swing frame (5221) is in the first position, the swing frame (5221) is located on a side close to the turntable (4), and the tooling base plate (5223) is in a horizontal state; when the swing frame (5221) is in the second position, the swing frame (5221) is located on a side close to the adjustment frame (5211), and the tooling base plate (5223) is in a vertical state.

6. The automatic bushing press for crankshaft connecting rod according to claim 1, characterized in that: The bushing feeding mechanism (6) comprises: A vibration plate (61), one end of which is close to the rotating plate (4) and is connected to a first feeding channel (611); A bushing spacer assembly (62), comprising a spacer frame (621), a conveyor belt (622), a push block (623), and a pressing unit (624); the spacer frame (621) is arranged between the first feeding channel (611) and the turntable (4); the conveyor belt (622) is arranged on the spacer frame (621) and extends to one side of the feeding channel; a second feeding channel (625) is arranged on the spacer frame (621); two ends of the conveyor belt (622) are respectively connected to the first feeding channel (611) and the second feeding channel (625); the push block (623) is arranged on the spacer frame (621) and one end of the push block (623) is provided with a receiving groove (6231); the receiving groove (6231) and the second feeding channel (625) are connected to each other. The end of the second feeding channel (625) is connected, the receiving groove (6231) is used to receive the bushing moved to the end of the second feeding channel (625), one side of the push block (623) is connected with the sixth driving member (626), the side of the material spacer (621) away from the push block (623) is provided with a storage hole (6211), the pressing unit (624) is arranged above the storage hole (6211), the sixth driving member (626) is used to drive the push block (623) to move toward the side close to the storage hole (6211), so as to move the bushing in the receiving groove (6231) to the top of the storage hole (6211) and drop it into the storage hole (6211), and the pressing unit (624) is used to push the bushing in the storage hole (6211) to move downward; A loading moving assembly (63) comprises a moving frame (631), a first moving unit (632), a second moving unit (633), a moving base plate (634), a three-jaw chuck (635), a seventh driving member (636) and an eighth driving member (637), wherein the moving frame (631) is arranged on the workbench (3), the first moving unit (632) is connected to the workbench (3), the second moving unit (633) is connected to the first moving unit (632), the moving base plate (634) is connected to the second moving unit (633), and the first moving unit (632) is used to drive the moving base plate (634) to move on the pressing rod (71). The third movable unit (633) is used to drive the movable base plate (634) to move back and forth between the material storage hole (6211), the second movable unit (633) is used to drive the movable base plate (634) to move back and forth in the direction close to or away from the lower end of the pressure rod (71), the three-jaw chuck (635) is rotatably connected to the movable base plate (634), the three-jaw chuck (635) is used to clamp the bushing dropped from the material storage hole (6211), the seventh driving member (636) is used to drive the three-jaw chuck (635) to move closer to or away from each other, thereby clamping or releasing the bushing, and the eighth driving member (637) is used to drive the three-jaw chuck (635) to rotate, thereby positioning the bushing so that the U-shaped groove on the bushing is in a preset position.

7. The automatic bushing press for crankshaft connecting rod according to claim 1, characterized in that: The bushing pressing mechanism (7) also includes a column (76), a ninth driving member (72), a slide (73), a pressure sensor (74) and a displacement sensor (75), wherein the column (76) is connected to the workbench (3) and is located on one side of the turntable (4), the column (76) is provided with a slide rail (761) extending vertically for convenience, the slide (73) is slidably connected to the slide rail (761), the pressure rod (71) is connected to the lower end of the slide (73), the ninth driving member (72) is arranged at the upper end of the column (76), the pressure sensor (74) is connected to the output end of the ninth driving member (72), the lower end of the pressure sensor (74) is connected to the slide (73), and the displacement sensor (75) is connected between the slide (73) and the column (76).

8. The automatic bushing press for crankshaft connecting rod according to claim 7, characterized in that: A connecting rod fixture (42) is provided on the placement position (41), and a large-end positioning pin (421) and a small-end positioning pin (422) are provided on the connecting rod fixture (42), and the small-end positioning pin (422) can move up and down relative to the connecting rod fixture (42).

9. The automatic bushing press for crankshaft connecting rod according to claim 8, characterized in that: A shrink sleeve (77) is provided above the small-end positioning pin (422), and the shrink sleeve (77) is connected to the column (76).

10. The automatic bushing press for crankshaft connecting rod according to claim 1, characterized in that: The connecting rod unloading mechanism (8) includes an unloading conveying assembly (81) and an unloading robot assembly (82), wherein the unloading robot assembly (82) includes an unloading robot (821), wherein the unloading robot (821) is used to grab the crankshaft connecting rod on which the bushing is pressed and installed on the placement position (41), and a rotating cylinder (822) is connected to one side of the unloading robot (821), wherein the rotating cylinder (822) is used to drive the unloading robot (821) to rotate, thereby rotating the crankshaft connecting rod on the unloading robot (821) from a horizontal state to a vertical state, and placing the crankshaft connecting rod vertically on the unloading conveying assembly (81), and the unloading conveying assembly (81) moves the crankshaft connecting rod on which the bushing is pressed and installed out of the workbench (3).

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