Crankshaft ring gear press fitting tool

Abstract

A kind of crankshaft gear ring press-fit tool, the crankshaft processing technical field, including the tooling table with installation window, the installation window of tooling table is rotatably installed with crankshaft carrier, the crankshaft carrier is provided with the lifting plate with lifting notch and end support plate, and the crankshaft carrier is installed with lifting positioning mechanism, the surface of tooling table is fixedly installed with push-tight positioning mechanism and clamping positioning mechanism, the front and rear surfaces of crankshaft carrier are fixedly installed with semicircular plate, the rear surface of rear semicircular plate is fixedly installed with half gear ring, the surface below tooling table is fixedly installed with stepper motor, the output shaft outer surface of stepper motor is sleeved with driving gear, driving gear is meshed with half gear ring, the present application can reduce the assembly error caused by positioning deviation, avoid unnecessary friction between gear ring and crankshaft, reduce wear risk, guarantee the transmission accuracy of crankshaft, at the same time, can make press-fit force evenly distributed, avoid assembly defects, improve product reliability and stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crankshaft machining, in particular to a crankshaft gear ring press-fitting tool. BACKGROUND

[0002] The gear ring, also known as a gear, is often installed on the crankshaft by the method of thermal expansion and contraction. The specific operation is to heat the gear ring first. After being heated, the inner diameter of the gear ring will expand and become larger until it exceeds the diameter of the crankshaft mounting part. At this time, the gear ring is pressed into the crankshaft by using a press machine. After the gear ring cools down, its inner diameter shrinks, forming an interference fit with the crankshaft, thereby firmly mounting it on the crankshaft.

[0003] After searching, there are two authorized patents in the related field, namely the patent with publication number CN115255888B, "Crankshaft gear ring press-fitting machine and press-fitting method", and the patent with publication number CN220217431U, "Engine crankshaft gear ring pressing tool". The installation methods of these two patents are both in the working condition of placing the crankshaft vertically to complete the installation of the gear ring.

[0004] Directly placing and press-fitting vertically has many drawbacks. Due to the limited vertical operation space, the gear ring is easily affected by gravity and quickly falls during installation, making it difficult to accurately align the center axis of the gear ring with the mounting position of the crankshaft, thereby affecting the assembly precision.

[0005] At the same time, when directly placing and press-fitting vertically, the gear ring quickly fits onto the crankshaft under the action of gravity, which may cause wear and deformation of the gear ring teeth, and even damage to the surface of the crankshaft, especially for high-precision mechanical crankshaft gear rings, even a small impact may affect the transmission precision of the entire mechanical device.

[0006] In addition, due to the difficulty in accurately grasping the initial contact state of the gear ring and the press-fitting equipment, direct vertical press-fitting may also result in uneven press-fitting force, which cannot ensure that the press-fitting force is uniformly applied to the entire circumference of the gear ring, seriously affecting the assembly quality.

[0007] Therefore, it is urgent to design a crankshaft gear ring press-fitting tool that places the gear ring horizontally first, uses the larger operation space to facilitate positioning and initial installation, and then uses a rotating structure to smoothly change it to a vertical state, reducing the risk of impact and damage, and better controlling the press-fitting process, thereby solving the above problems in the prior art. SUMMARY

[0008] The purpose of the present application is to provide a crankshaft gear ring press-fitting tool to solve the problems raised in the background art.

[0009] To achieve the above purpose, the present application provides the following technical solutions:

[0010] A crankshaft gear press fitting tool, comprising a tool table with a mounting window, a crankshaft carrier is rotatably mounted in the mounting window of the tool table, a lifting plate with a lifting notch and an end lifting plate are arranged in the crankshaft carrier, and a lifting positioning mechanism is mounted in the crankshaft carrier, the lifting positioning mechanism is located on the left side of the lifting plate, a pushing positioning mechanism and a clamping positioning mechanism are fixedly mounted on the surface of the tool table, the pushing positioning mechanism is located on the left side of the crankshaft carrier, and the pushing positioning mechanism is used for positioning the crankshaft in the lifting plate horizontally, when the crankshaft is vertically placed, the clamping positioning mechanism is used in cooperation with the lifting positioning mechanism to clamp and fix the gear ring on the crankshaft, semicircular plates are fixedly mounted on the front and rear surfaces of the crankshaft carrier, a half gear ring is fixedly mounted on the rear surface of the rear semicircular plate, a stepping motor is fixedly mounted below the surface of the tool table, a drive gear is sleeved on the outer surface of the output shaft of the stepping motor, and the drive gear is in meshing connection with the half gear ring.

[0011] Preferably, a sliding groove is formed through the crankshaft carrier, the lifting positioning mechanism comprises a sliding block, the sliding block is slidingly installed in the sliding groove, a fixed plate is fixedly mounted on the upper surface of the sliding block, a U-shaped supporting plate is fixedly mounted on the upper surface of the fixed plate, and a telescopic cylinder A is fixedly mounted on the right surface of the sliding block.

[0012] Preferably, the pushing positioning mechanism comprises a telescopic cylinder B, the telescopic cylinder B is fixedly mounted on the surface of the tool table, and a push block is fixedly mounted on the right end of the telescopic cylinder B.

[0013] Preferably, the clamping positioning mechanism comprises a J-shaped frame and a telescopic cylinder C, the bottom end of the J-shaped frame is rotatably connected with the surface of the tool table, two pressing blocks are fixedly mounted on the top end of the J-shaped frame, a horizontal rod is fixedly mounted in the J-shaped frame, one end of the telescopic cylinder C is rotatably connected with the surface of the tool table, and the other end of the telescopic cylinder C is rotatably connected with the horizontal rod.

[0014] Preferably, two synchronous telescopic cylinders are fixedly mounted in the tool table, the top ends of the two synchronous telescopic cylinders are fixedly mounted with L-shaped supporting blocks, the two L-shaped supporting blocks are oppositely arranged, the two synchronous telescopic cylinders are arranged on the left and right sides of the crankshaft carrier respectively, and the synchronous telescopic cylinders are located below the mounting window of the tool table.

[0015] Preferably, two bearing seats are fixedly mounted on the surface of the tool table, inner rotor bearings are fixedly mounted in the bearing seats, and rotating shaft rods are fixedly mounted in the inner rotor bearings, and one end of the rotating shaft rod close to the crankshaft carrier is fixedly connected with the crankshaft carrier.

[0016] Preferably, three adapters are fixedly installed on the table top of the tool table, the left adapter is rotatably connected between the pin shaft and the telescopic cylinder C, and the right two adapters are rotatably connected with the bottom end of the J-shaped frame through pin shafts.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] When the crankshaft gear ring is pressed and assembled, the crankshaft is first positioned horizontally in the crankshaft loading table, and the position of the gear ring is preliminarily positioned by the cooperation of the push positioning mechanism and the lifting positioning mechanism. Then, the crankshaft loading table is turned ninety degrees together with the crankshaft by the cooperation of the stepping motor, the driving gear and the half gear ring, so that the crankshaft is placed vertically. Finally, the position of the gear ring is clamped and fixed by the cooperation of the clamping positioning mechanism and the lifting positioning mechanism. The assembly accuracy of the gear ring and the crankshaft installation position is ensured in all directions, the assembly error caused by positioning deviation is effectively reduced, unnecessary friction between the gear ring and the crankshaft during assembly is avoided, the wear risk is greatly reduced, the transmission accuracy of the assembled crankshaft is ensured, the crankshaft can stably and efficiently transmit power during subsequent operation, the transmission efficiency loss and fault hidden danger caused by wear are reduced, and in addition, the lifting positioning mechanism provides stable lifting force to the longitudinally placed crankshaft gear ring in the vertical assembly state, and the clamping positioning mechanism uniformly clamps and holds the gear ring. The cooperative action makes the pressing force uniformly distributed on the assembly interface of the gear ring and the crankshaft, effectively avoids assembly defects caused by uneven pressing force, further ensures assembly quality, and improves the reliability and stability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic diagram when the crankshaft of the present application is used horizontally.

[0020] Figure 2 It is a structure schematic diagram when the crankshaft of the present application is used horizontally. Figure 1 It is an enlarged view of the local structure at a in the middle.

[0021] Figure 3 It is a structure schematic diagram of the crankshaft loading table of the present application.

[0022] Figure 4 It is a structure schematic diagram of the driving motor of the present application.

[0023] Figure 5 It is a structure schematic diagram of the U-shaped supporting plate of the present application.

[0024] Figure 6 It is a structure schematic diagram when the crankshaft of the present application is used longitudinally.

[0025] Figure 7 It is a structure schematic diagram when the crankshaft of the present application is used longitudinally. Figure 6 It is an enlarged view of the local structure at b in the middle.

[0026] Figure 8 Fig. 1 is a schematic view of the lifting plate structure of the present application.

[0027] In the figure: 1, tooling table; 11, bearing seat; 111, inner rotor bearing; 2, crankshaft carrier; 21, lifting plate; 22, end lifting plate; 23, sliding groove; 3, lifting positioning mechanism; 31, sliding block; 32, fixed plate; 33, U-shaped lifting plate; 34, telescopic cylinder A; 4, push positioning mechanism; 41, telescopic cylinder B; 42, push block; 5, clamping positioning mechanism; 51, J-shaped frame; 511, cross rod; 52, telescopic cylinder C; 53, pressing block; 6, synchronous telescopic cylinder; 61, L-shaped lifting block; 7, semicircular plate; 8, stepper motor; 81, driving gear. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , the present application provides a technical solution:

[0030] A crankshaft gear ring press-fitting tool, comprising a tooling table 1 with a mounting window, a crankshaft carrier 2 is rotatably installed in the mounting window of the tooling table 1, a lifting plate 21 with a lifting slot and an end lifting plate 22 are arranged in the crankshaft carrier 2, and a lifting positioning mechanism 3 is installed in the crankshaft carrier 2, the lifting positioning mechanism 3 is located on the left side of the lifting plate 21, a push positioning mechanism 4 and a clamping positioning mechanism 5 are fixedly installed on the top surface of the tooling table 1, the push positioning mechanism 4 is located on the left side of the crankshaft carrier 2, the push positioning mechanism 4 is used to position the crankshaft horizontally in the lifting plate 21, and when the crankshaft is vertically placed, the clamping positioning mechanism 5 is used in cooperation with the lifting positioning mechanism 3 to clamp and fix the gear ring on the crankshaft, semicircular plates 7 are fixedly installed on the front and rear surfaces of the crankshaft carrier 2, a half gear ring (the half gear ring does not appear in the figure due to the viewing angle problem of the drawing) is fixedly installed on the rear surface of the rear semicircular plate 7, a stepper motor 8 is fixedly installed below the top surface of the tooling table 1, a driving gear 81 is sleeved on the outer surface of the output shaft of the stepper motor 8, the driving gear 81 is in meshing connection with the half gear ring, the stepper motor 8 is a reversible motor, which can drive the semicircular plate 7 and the crankshaft carrier 2 to rotate as a whole through the linkage of the driving gear 81 and the half gear ring, so as to change the crankshaft from a horizontal placement state to a vertical placement state.

[0031] The automatic locking structure body is provided between the end supporting plate 22 and the crankshaft supporting table 2, and is a mechanical buckle type automatic locking mechanism, an electromagnetic adsorption type automatic locking mechanism or a hydraulic clamping type automatic locking mechanism in the prior art (all of which are common knowledge in the tooling field and will not be explained here), when the crankshaft is placed on the lifting plate 21 and the end supporting plate 22, and positioned by the push positioning mechanism 4, the automatic locking mechanism can be used to clamp and fix it, and then the stability of the crankshaft during the turning and changing of the placement state can be ensured.

[0032] In combination with Figure 2 and Figure 3 , the push positioning mechanism 4 includes a telescopic cylinder B41 fixedly installed on the table surface of the tooling table 1, and a push block 42 fixedly installed at the right end of the telescopic cylinder B41, the push block 42 is made of rubber material and can reduce damage to the crankshaft during pushing, when the crankshaft loaded with the gear ring is placed horizontally in the crankshaft supporting table 2 and lifted by the lifting plate 21 and the end supporting plate 22, the telescopic cylinder B41 starts to work. It pushes the crankshaft to the right side by the extension action of the push block 42 until the balance block outer surface of the crankshaft is tightly fitted with the left surface of the lifting plate 21, thereby completing the positioning operation of the crankshaft during the initial placement and laying a precise foundation for the subsequent assembly process.

[0033] In combination with Figure 7 and Figure 5 , the crankshaft supporting table 2 is provided with a sliding groove 23, the lifting positioning mechanism 3 includes a sliding block 31 slidably installed in the sliding groove 23, and a fixed plate 32 fixedly installed on the upper surface of the sliding block 31, and a U-shaped supporting plate 33 fixedly installed on the upper surface of the fixed plate 32, and a telescopic cylinder A34 fixedly installed on the right surface of the sliding block 31, and the telescopic cylinder A34 is fixedly installed on the lower surface of the crankshaft supporting table 2.

[0034] When the crankshaft is placed horizontally and the initial positioning is completed, the telescopic cylinder A34 is started immediately. Through the extension action, the cylinder stably pushes the installed gear ring to the designated installation position on the left side. This measure is very important, which can effectively avoid the change of the position of the gear ring due to the sliding of the crankshaft when it is turned to the longitudinal placement state, thereby adversely affecting the assembly accuracy, ensuring the accurate installation position of the gear ring, and providing a strong guarantee for the smooth progress of the subsequent assembly process and the final assembly quality.

[0035] In combination with Figure 5 and Figure 6As shown, the clamping positioning mechanism 5 includes a J-shaped frame 51 and a telescopic cylinder C52, the bottom end of the J-shaped frame 51 is rotatably connected between the table top of the tooling table 1, and two pressing blocks 53 are fixedly installed at the top end of the J-shaped frame 51, a crossbar 511 is fixedly installed in the J-shaped frame 51, one end of the telescopic cylinder C52 is rotatably connected between the table top of the tooling table 1, and the other end of the telescopic cylinder C52 is rotatably connected with the crossbar 511;

[0036] When the crankshaft carrier 2 is turned over 90 degrees under the drive of the stepping motor 8 and is placed vertically, the telescopic cylinder C52 starts to work, and its extension action drives the top end of the J-shaped frame 51 and the pressing blocks 53 to turn over towards the direction of the crankshaft gear ring. When turned over to a specific position, the two pressing blocks 53 press the upper surface of the gear ring from different directions in turn. At this time, the pressing blocks 53 cooperate with the lifting positioning mechanism 3 to stably lock the position of the gear ring, and thus the pressing and fixing operation of the gear ring is completed.

[0037] In order to reduce the labor intensity when placing the crankshaft into the crankshaft carrier 2, combined with the Figure 1 As shown, two synchronous telescopic cylinders 6 are fixedly installed in the tooling table 1, the top end of each of the two synchronous telescopic cylinders 6 is fixedly installed with an L-shaped supporting block 61, the two L-shaped supporting blocks 61 are oppositely arranged, the two synchronous telescopic cylinders 6 are respectively arranged on the left and right sides of the crankshaft carrier 2, and the synchronous telescopic cylinder 6 is located below the installation window of the tooling table 1. When operating, the crankshaft is first hoisted by an external lifting tool between the two L-shaped supporting blocks 61, and then the crankshaft is slowly lowered into the crankshaft carrier 2 by controlling the contraction of the two synchronous telescopic cylinders 6, so as to reduce the labor intensity of the crankshaft placing work.

[0038] Specifically, two bearing seats 11 are fixedly installed on the table top of the tooling table 1, an inner rotor bearing 111 is fixedly installed in each of the bearing seats 11, a rotating shaft rod is fixedly installed in each of the inner rotor bearings 111, one end of the rotating shaft rod close to the crankshaft carrier 2 is fixedly connected with the crankshaft carrier 2, and the crankshaft carrier 2 is rotatably installed in the installation window of the tooling table 1 through the cooperation of the rotating shaft rod and the inner rotor bearing 111.

[0039] Specifically, three adapter seats are fixedly installed on the table top of the tooling table 1, the left adapter seat is rotatably connected between the telescopic cylinder C52 and the pin shaft, so as to rotatably connect the telescopic cylinder C52 and the table top of the tooling table 1, and the right two adapter seats are rotatably connected with the bottom end of the J-shaped frame 51 through pin shafts, and the bottom end of the J-shaped frame 51 is rotatably connected with the table top of the tooling table 1 through the right two adapter seats.

[0040] Working principle: in use, first, with the help of external lifting appliance, the crankshaft is lifted to the two L-shaped blocks 61, then, by controlling the two synchronous telescopic cylinders 6 to retract, the crankshaft is slowly lowered into the crankshaft loading platform 2, and is placed between the lifting plate 21 and the end plate 22, then, the crankshaft is pushed to the right side by the pushing and positioning mechanism 4, the outer surface of the balance block of the crankshaft is tightly attached to the left surface of the lifting plate 21, so that the positioning operation of the crankshaft during initial placement is completed, after positioning, the automatic locking mechanism is used for clamping and fixing, then, the telescopic cylinder A34 is started and expands, and the installed gear ring is stably pushed to the designated installation position on the left side, and the gear ring is prevented from sliding down during the turning process, then, by the cooperation of the driving gear 81 and the half gear ring, the step motor 8 drives the crankshaft loading platform 2 to turn 90 degrees, so that the crankshaft is vertically placed, finally, the telescopic cylinder C52 is started and expands, and drives the top end of the J-shaped frame 51 and the pressing block 53 to turn towards the direction of the crankshaft gear ring, when turning to a specific position, the two pressing blocks 53 are tightly pressed on the upper surface of the gear ring from different directions. At this time, the pressing block 53 cooperates with the lifting and positioning mechanism 3 to stably lock the position of the gear ring, so that the pressing and fixing operation of the gear ring is completed, after the gear ring is cooled, the crankshaft is removed from the crankshaft loading platform 2 and moved to another machining process, compared with the prior art, the tooling and assembly process of the present application can ensure the assembly accuracy of the gear ring and the crankshaft in all directions, can reduce the assembly error caused by positioning deviation, can avoid unnecessary friction between the gear ring and the crankshaft, can reduce the risk of wear and tear, can ensure the transmission accuracy of the crankshaft, can reduce the loss of transmission efficiency and hidden troubles, and can make the pressing force uniformly distributed when vertically assembling, can avoid assembly defects, and can improve the reliability and stability of the product.

Claims

1. A crankshaft gear ring press-fitting tool, comprising a tooling table with a mounting window, characterized in that: The cam is fixedly mounted on the workbench, and a lifting plate and an end supporting plate with lifting slots are arranged in the crankshaft carrier, and a lifting positioning mechanism is installed in the crankshaft carrier, and the lifting positioning mechanism is located on the left side of the lifting plate. A pushing positioning mechanism and a clamping positioning mechanism are fixedly mounted on the table top of the workbench, and the pushing positioning mechanism is located on the left side of the crankshaft carrier, and the pushing positioning mechanism is used to position the crankshaft laterally in the lifting plate. When the crankshaft is placed vertically, the clamping positioning mechanism cooperates with the lifting positioning mechanism to clamp the gear ring on the crankshaft. Semicircular plates are fixedly mounted on the front and rear surfaces of the crankshaft carrier, and a half gear ring is fixedly mounted on the rear surface of the semicircular plate on the rear side. A stepping motor is fixedly mounted under the table top of the workbench, and a driving gear is sleeved on the outer surface of the output shaft of the stepping motor, and the driving gear is meshed with the half gear ring. A slide groove is provided in the crankshaft carrier, and the lifting and positioning mechanism includes a slider, which is slidably installed in the slide groove, and a fixed plate is fixedly installed on the upper surface of the slider, and a U-shaped supporting plate is fixedly installed on the upper surface of the fixed plate. A telescopic cylinder A is fixedly installed on the right surface of the slider, and the telescopic cylinder A is fixedly installed on the lower surface of the crankshaft carrier; The pushing and positioning mechanism includes a telescopic cylinder B, which is fixedly mounted on the table of the workbench, and a push block is fixedly mounted on the right end of the telescopic cylinder B; The clamping and positioning mechanism includes a J-shaped frame and a telescopic cylinder C. The bottom end of the J-shaped frame is rotatably connected to the table top of the workbench, and two pressure blocks are fixedly installed on the top of the J-shaped frame. A crossbar is fixedly installed inside the J-shaped frame. One end of the telescopic cylinder C is rotatably connected to the table top of the workbench, and the other end of the telescopic cylinder C is rotatably connected to the crossbar. Two bearing seats are fixedly installed on the table of the workbench, and inner rotor bearings are fixedly installed in the bearing seats. A rotating shaft rod is fixedly installed in the inner rotor bearings, and one end of the rotating shaft rod close to the crankshaft carrier is fixedly connected to the crankshaft carrier; Three adapters are fixedly installed on the table top of the workbench. The adapter on the left is rotatably connected to the telescopic cylinder C through a pin shaft, and the two adapters on the right are rotatably connected to the bottom end of the J-shaped frame through pin shafts.

2. The crankshaft gear ring press-fitting tool according to claim 1, characterized in that: Two synchronous telescopic cylinders are fixedly installed in the workbench, and L-shaped support blocks are fixedly installed on the top of the two synchronous telescopic cylinders. The two L-shaped support blocks are arranged opposite to each other. The two synchronous telescopic cylinders are respectively arranged on the left and right sides of the crankshaft carrier, and the synchronous telescopic cylinders are located below the installation window of the workbench.

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