Crankshaft thrust face polishing device

Abstract

The utility model provides a kind of crankshaft thrust face polishing device, it is related to crankshaft main journal both sides thrust face polishing technical field, including mounting bracket, clamping turnover assembly, mounting rod, manual translation component, telescopic cylinder, first servo motor, driving motor, polishing disc, abrasive band and distance sensor;The present application can be stably clamped to the crankshaft Limit, at the same time through the synergies of manual translation component, telescopic cylinder, first servo motor, driving motor, polishing disc and abrasive band can be polished in order to the perpendicular thrust face of crankshaft main journal both sides, and artificial does not need close to crankshaft and handheld operation polishing equipment operation in polishing process, and then the security risk and labor intensity in polishing process are reduced.

Description

Technical Field

[0001] This utility model relates to the field of polishing technology for the thrust surfaces on both sides of the crankshaft main journal, and more specifically, to a crankshaft thrust surface polishing device. Background Technology

[0002] The crankshaft is a crucial component of an engine. It bears the force transmitted from the connecting rods and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. The crankshaft requires sufficient strength and rigidity, as well as good balance during rotation; therefore, the manufacturing precision of the crankshaft is critical.

[0003] The crankshaft thrust surfaces refer to the two end faces of the crankshaft main journals, and thrust washers need to be installed on the thrust surfaces. The significance of the thrust washers is as follows:

[0004] (1) Limit crankshaft axial movement

[0005] The thrust washers constrain the crankshaft's axial (engine front-to-back direction) displacement by clamping the crankshaft thrust surface, preventing abnormal movement caused by thermal expansion, clutch operation, or inertial forces, and maintaining the geometric fit between the crankshaft and the piston connecting rod mechanism.

[0006] (2) Bearing axial load

[0007] During engine operation, the crankshaft is subjected to periodic axial thrust transmitted by the piston and connecting rod (such as shifting impact and inertial force). The thrust washers disperse the load through the friction interface, prevent the crankshaft from directly contacting and rubbing against the main bearing housing, and reduce local stress concentration.

[0008] Currently, after the crankshaft is manufactured, in order to ensure that the thrust surfaces on both sides of the main journal can fit tightly with the thrust washers after they are installed, a polishing process is required for the thrust surfaces. The current polishing process involves manually holding a hand-held belt polishing device close to the rotating main journal surface, so that the sanding belt in the transmission fits tightly with the main journal surface, and then the main journal and the thrust surfaces can be polished together. However, this requires manual operation of the hand-held belt polishing device at close range to the crankshaft during the polishing process, which poses a significant safety hazard and the labor intensity needs to be reduced. Utility Model Content

[0009] The purpose of this invention is to solve the problems mentioned in the background art and to propose a crankshaft thrust surface polishing device.

[0010] The technical solution adopted by this utility model to solve its technical problem is:

[0011] A crankshaft thrust surface polishing device includes a mounting bracket, a clamping and tilting assembly, a mounting rod, a manual translation assembly, a telescopic cylinder, a first servo motor, a drive motor, a polishing disc, a sanding belt, and a distance sensor.

[0012] The clamping and tilting assembly is mounted on the mounting bracket to stably clamp the crankshaft and make its main journal rotate at a constant speed in place.

[0013] The mounting rod is fixed on the mounting bracket and is equipped with a manually movable component that can lock the orientation.

[0014] The telescopic cylinder is fixed to the manual translation component;

[0015] The first servo motor is connected to a telescopic cylinder;

[0016] The drive motor is connected to the first servo motor;

[0017] A drive motor is connected to the center of the polishing disc, and an abrasive belt of the same diameter is installed on the polishing disc;

[0018] A distance sensor is mounted on the drive motor to detect the distance between the crankshaft journals.

[0019] Furthermore, the clamping and flipping assembly includes a second servo motor, a chuck, a cylinder, a movable rod, and an ejector pin.

[0020] The second servo motor and cylinder are both fixed on the mounting bracket;

[0021] The chuck is connected to a second servo motor;

[0022] The movable rod is slidably fitted with the mounting bracket and is connected to a cylinder.

[0023] The ejector pin is rotated on the movable rod, and the center of the ejector pin and the center of the chuck are on the same straight line.

[0024] Furthermore, the manual translation assembly includes a slide rail, a slider, fixing bolts, and a pull rod.

[0025] The slide rail is fixed on the mounting rod and has several locking holes.

[0026] The slider slides in conjunction with the slide rail, and the slider is provided with a fixing bolt that is threaded into one of the locking holes;

[0027] The main body of the pull rod is L-shaped and fixed on the slider.

[0028] Furthermore, a rubber layer is provided around the circumference of the arc surface of the polishing disc.

[0029] Furthermore, the rotational speed of the drive motor is greater than that of the second servo motor.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] Compared with existing technologies, this application can stably clamp and limit the crankshaft. At the same time, through the coordinated action of the manual translation component, telescopic cylinder, first servo motor, drive motor, polishing disc and sanding belt, the vertical thrust surfaces on both sides of the crankshaft main journal can be polished sequentially. Moreover, during the polishing process, the operator does not need to be close to the crankshaft and operate the polishing equipment by hand, thereby reducing the safety hazards and labor intensity during the polishing process. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0033] Figure 2 This is a schematic diagram of the movement of the polishing disc;

[0034] Figure label:

[0035] 1. Mounting bracket; 2. Mounting rod; 3. Telescopic cylinder; 4. First servo motor; 5. Drive motor; 6. Polishing disc; 7. Sanding belt; 8. Distance sensor; 9. Second servo motor; 10. Chuck; 11. Cylinder; 12. Movable rod; 13. Ejector pin; 14. Slide rail; 15. Slider; 16. Fixing bolt; 17. Pull rod. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0037] like Figure 1 and Figure 2 As shown, a crankshaft thrust surface polishing device includes a mounting frame 1, a clamping and flipping assembly, a mounting rod 2, a manual translation assembly, a telescopic cylinder 3, a first servo motor 4, a drive motor 5, a polishing disc 6, a sanding belt 7, and a distance sensor 8.

[0038] The clamping and flipping assembly is mounted on the mounting bracket 1 to stably clamp the crankshaft and make its main journal rotate in place at a uniform speed.

[0039] Mounting rod 2 is fixed on mounting bracket 1 and is equipped with a manual translation component that can lock the orientation.

[0040] The telescopic cylinder 3 is fixed on the manual translation component;

[0041] The first servo motor 4 is connected to the telescopic cylinder 3;

[0042] The drive motor 5 is connected to the first servo motor 4;

[0043] The polishing disc 6 is connected to the center of the drive motor 5, and the polishing disc 6 is equipped with a sanding belt 7 of the same diameter (and a rubber layer is provided on the circumference of the arc surface of the polishing disc 6 to avoid hard contact between the arc surface of the polishing disc 6 and the surface of the spindle journal).

[0044] Distance sensor 8 is fixed on drive motor 5 to detect the distance between crankshaft journals.

[0045] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the clamping and flipping assembly includes a second servo motor 9, a chuck 10, a cylinder 11, a movable rod 12, and an ejector pin 13.

[0046] The second servo motor 9 and the cylinder 11 are both fixed on the mounting bracket 1;

[0047] The chuck 10 is connected to a second servo motor 9;

[0048] The movable rod 12 is slidably engaged with the mounting bracket 1, and the movable rod 12 is connected to the cylinder 11;

[0049] The ejector pin 13 is rotatably mounted on the movable rod 12, and the center of the ejector pin 13 is on the same straight line as the center of the chuck 10.

[0050] Specific implementation of the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the manual translation assembly includes a slide rail 14, a slider 15, a fixing bolt 16, and a pull rod 17.

[0051] The slide rail 14 is fixed on the mounting rod 2 and has several locking holes.

[0052] The slider 15 is slidably engaged with the slide rail 14, and the slider 15 is provided with a fixing bolt 16 that is threadedly engaged with one of the locking holes;

[0053] The L-shaped pull rod 17 is fixed on the slider 15.

[0054] To ensure effective polishing of the thrust surfaces on both sides of the crankshaft main journal, the above embodiment is further optimized by increasing the speed of the drive motor 5 to be greater than that of the second servo motor 9.

[0055] It should be noted that the telescopic cylinder 3, the first servo motor 4, the drive motor 5, the distance sensor 8, the second servo motor 9, and the cylinder 11 are all electrically connected to the controller, which is not labeled in the figure.

[0056] The working process of this utility model:

[0057] First, connect one end of the crankshaft to the chuck 10. After the chuck 10 clamps the crankshaft, the controller controls the cylinder 11 to operate, which in turn drives the ejector pin 13 to press the other end of the crankshaft. Then, the crankshaft will not shift its position during the subsequent uniform rotation. After positioning, the center of the main journal and the center of the chuck 10 are on the same axis, and then the main journal rotates in place.

[0058] Then, by pulling rod 17, the polishing disc 6 can be moved to one side of the spindle journal. At this time, the polishing disc 6 can approach the spindle journal without obstruction. Then, by controlling the telescopic cylinder 3 through the controller, the polishing disc 6 can be driven to approach the surface of the spindle journal. When the distance sensor 8 detects that the distance between the polishing disc and the spindle journal is about to reach the preset value range, it will send a feedback signal to the controller. At this time, the controller will control the telescopic cylinder 3 to stop.

[0059] Then move the lever 17 to the right again for a slight adjustment. When the sand belt 7 on the outside of the polishing disc 6 comes into contact with the right thrust surface, the position of the slider 15 on the slide rail 14 can be locked by the fixing bolt 16. Then, the polishing process of the right thrust surface can be completed by controlling the second servo motor 9 and the drive motor 5 through the controller.

[0060] After polishing the right thrust surface of the crankshaft main journal is completed, the lock between the slider 15 and the slide rail 14 is first released. Then, the telescopic cylinder 3 drives the polishing disc 6 away from the crankshaft to a position that does not affect rotation. Then, the controller controls the first servo motor 4 to operate, so that the polishing disc 6 can be accurately rotated 180 degrees. Then, through the action of the telescopic cylinder 3 and the manual translation component, the polishing disc 6 can be brought into contact with the thrust surface on the left side of the crankshaft main journal and polished. This completes the polishing process of the vertical thrust surfaces on both sides of the crankshaft main journal. Finally, the polishing disc 6 is pulled away from the crankshaft, and then the clamping of the ejector pin 13 and the chuck 10 is released to complete the unloading.

[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crankshaft thrust surface polishing device, characterized in that, Includes a mounting bracket (1), a clamping and flipping assembly, a mounting rod (2), a manual translation assembly, a telescopic cylinder (3), a first servo motor (4), a drive motor (5), a polishing disc (6), a sanding belt (7), and a distance sensor (8). The clamping and flipping assembly is mounted on the mounting bracket (1) to stably clamp the crankshaft and make its main journal rotate in place at a constant speed; The mounting rod (2) is fixed on the mounting bracket (1) and the mounting rod (2) is equipped with a manual translation component that can lock the orientation; The telescopic cylinder (3) is fixed on the manual translation component; The first servo motor (4) is connected to a telescopic cylinder (3); The drive motor (5) is connected to the first servo motor (4); A drive motor (5) is connected to the center of the polishing disc (6), and an abrasive belt (7) of the same diameter is installed on the polishing disc (6); A distance sensor (8) is mounted on the drive motor (5) to detect the distance between the crankshaft journals.

2. The crankshaft thrust surface polishing device according to claim 1, characterized in that, The clamping and flipping assembly includes a second servo motor (9), a chuck (10), a cylinder (11), a movable rod (12), and a ejector pin (13). The second servo motor (9) and the cylinder (11) are both fixed on the mounting bracket (1); The chuck (10) is connected to a second servo motor (9); The movable rod (12) is slidably engaged with the mounting bracket (1), and the movable rod (12) is connected to a cylinder (11); The ejector pin (13) is rotatably mounted on the movable rod (12), and the center of the ejector pin (13) and the center of the chuck (10) are on the same straight line.

3. The crankshaft thrust surface polishing device according to claim 1, characterized in that, The manual translation assembly includes a slide rail (14), a slider (15), a fixing bolt (16), and a pull rod (17). The slide rail (14) is fixed on the mounting rod (2) and has several locking holes. The slider (15) is slidably engaged with the slide rail (14), and the slider (15) is provided with a fixing bolt (16) that is threadedly engaged with one of the locking holes; The main body of the pull rod (17) is L-shaped and fixed on the slider (15).

4. The crankshaft thrust surface polishing device according to claim 1, characterized in that, A rubber layer is provided on the circumference of the arc surface of the polishing disc (6).

5. A crankshaft thrust surface polishing device according to claim 2, characterized in that, The speed of the drive motor (5) is greater than the speed of the second servo motor (9).

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