High-torque milling machine for machining crankshaft

Abstract

The utility model discloses a high-torque milling machine for machining a crankshaft. According to the technical scheme, the lathe comprises a base and a machine shell, a machining main shaft assembly and a tailstock chuck assembly are fixedly installed on the base, a tool turret sliding table assembly is further fixedly installed on the base and comprises a cutter head assembly, the cutter head assembly is used for machining a crankshaft, and a stable clamping jaw assembly is further connected to the base in a sliding mode. The cutterhead assembly comprises a cutterhead main shaft, a driving motor and a cutterhead body, a planetary gear speed reducer is arranged between the cutterhead main shaft and the driving motor, and the cutterhead main shaft is sleeved with a cutterhead main shaft box body; a front sealing cover, a front double-row bearing, a conical bearing, a sun retainer ring, a rear double-row bearing and a rear sealing cover are sequentially arranged in the cutter head spindle box body from near to far away from the cutter head body. The milling machine has the advantages that the high-rigidity heavy-load machining spindle and the cutter head spindle are adopted, so that the milling machine can adapt to a working environment with larger torque for a long time, and the upper limit of cutting depth and precision during machining of the milling machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a high-torque milling machine for machining crankshafts. Background Art

[0002] The machining of crankshafts is usually carried out by a follow-up milling machine. The core is to control the synchronous movement of the tool and the crankshaft through a numerical control system, so that the tool can be dynamically adjusted along the non-circular trajectory of the crankshaft during the machining process, thereby meeting the machining requirements of complex curved surfaces.

[0003] The machining of crankshafts needs to withstand high cutting forces and complex loads. However, the traditional spindle structure has low rigidity and is prone to vibration and deformation under high-torque working conditions, resulting in a decline in the machining surface quality and difficulty in ensuring dimensional accuracy.

[0004] Therefore, a new method is needed to solve the above problems. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model provides a high-torque milling machine for machining crankshafts.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: A high-torque milling machine for machining crankshafts includes a base and a machine housing. A machining spindle assembly and a tailstock chuck assembly are fixedly installed on the base. The machining spindle assembly and the tailstock chuck assembly are respectively used to fix both ends of the crankshaft. A turret slide assembly is also fixedly installed on the base. The turret slide assembly includes a tool disc assembly, and the tool disc assembly is used to machine the crankshaft. A stable jaw assembly for clamping the crankshaft is also slidably connected to the base. The tool disc assembly includes a tool disc spindle, a driving motor, and a tool disc body. The tool disc body is fixedly connected to the tool disc spindle and rotates synchronously with the tool disc spindle. The driving motor is used to drive the tool disc spindle to rotate. A planetary gear reducer is arranged between the tool disc spindle and the driving motor. A tool disc spindle housing is sleeved outside the tool disc spindle. Inside the tool disc spindle housing, a front seal cover, a front double-row bearing, a tapered bearing, a sun retainer, a rear double-row bearing, and a rear seal cover are arranged in sequence from near to far from the tool disc body. Washers are arranged between the front seal cover and the front double-row bearing, between the front double-row bearing and the tapered bearing, and between the sun retainer and the tapered bearing. A locking nut is also fixedly connected between the sun retainer and the rear double-row bearing.

[0007] Through the above settings: the planetary gear reducer is used to amplify the torque output by the driving motor, so that the cutter head has a greater torque during the machining process, which can deepen the cutting depth during machining, thereby obtaining higher machining efficiency. At the same time, compared with the traditional gearbox reduction, it has the advantages of simple structure and compact layout, which is convenient for maintenance and repair. And through the cutter head spindle box body and multiple bearings sleeved on the cutter head spindle in the box body, the load capacity of the spindle is improved, so that the spindle can work under high torque for a long time, thus ensuring that the milling machine has higher cutting ability and higher machining accuracy.

[0008] Further: a front retaining ring is fixedly connected to the spindle outside the cutter head spindle box and close to the cutter head body, the front retaining ring is fixedly connected to the cutter head body, a rear locking cover is fixedly connected to the spindle outside the cutter head spindle box and close to the planetary gear reducer, a fixing seat is arranged on the planetary gear reducer, the shaft of the planetary gear reducer is fixedly connected to the spindle, and the fixing seat is fixedly connected to the rear locking cover.

[0009] Through the above settings: the settings of the front retaining ring and the rear locking cover can further improve the stability of the spindle itself, avoid the spindle from vibrating during the machining process, thereby ensuring the machining accuracy of the milling machine, and the double connection between the planetary gear reducer and the spindle ensures both stability and connection strength, ensuring that the torque can be transmitted smoothly.

[0010] Further: the driving motor is located above the planetary gear reducer, the driving motor and the planetary gear reducer are driven by a belt pulley. The belt pulley includes an upper synchronous pulley connected to the driving motor and a lower synchronous pulley connected to the planetary gear reducer. The upper synchronous pulley and the lower synchronous pulley are jointly connected by a transmission belt, and the diameter of the upper synchronous pulley is smaller than that of the lower synchronous pulley.

[0011] Through the above settings: the synchronous pulley with a smaller upper and a larger lower diameter makes the driving motor perform preliminary deceleration when transmitting torque to the planetary gear reducer. Combined with the deceleration ability of the planetary gear reducer itself, the torque of the driving motor is further amplified, thereby increasing the torque upper limit of the cutter head spindle, and further improving the machining upper limit of the milling machine.

[0012] Further: the driving motor includes a mounting seat and an adjusting seat. The adjusting seat is used to adjust the position of the driving motor. The adjusting seat is installed above the mounting seat, and the mounting seat is fixedly connected to the top surface of the cutter head spindle box body.

[0013] With the above settings: The way the mounting base is fixed to the cutter head spindle housing improves the structural integrity of the turret slide assembly itself, so that the cutter head can obtain higher stability during operation, further preventing the cutter head spindle from vibrating, thus ensuring machining accuracy and extending the life of parts.

[0014] Furthermore: The turret slide assembly further includes a cutter head moving seat slidably connected to the base. A translation motor is provided on the base, and the output end of the translation motor is fixedly connected to a lead screw. A connecting seat for threadedly connecting with the lead screw and moving along the lead screw is fixed to the bottom of the cutter head moving seat.

[0015] With the above settings: The cutter head moving seat enables the turret slide assembly to have the ability to move along the axial direction of the crankshaft. Using the lead screw to achieve the sliding of the cutter head moving seat can make the moving accuracy of the cutter head moving seat higher, so that the cutting accuracy of the cutter head for the crankshaft can be higher, thereby improving the machining quality.

[0016] Furthermore: The cutter head moving seat is inclined at 45° relative to the base. A housing fixed slide is fixedly connected below the cutter head spindle housing. A turret slide is fixedly connected to the cutter head moving seat. The housing fixed slide is slidably connected to the turret slide, and a slide motor for driving the housing fixed slide to slide is provided on the turret slide.

[0017] With the above settings: The cutter head body slides along the cutter head moving seat, so that the cutter head body and the crankshaft to be machined are arranged at 45°. It can eliminate stress to a certain extent, so that the milling machine has higher rigidity and strength, and further improve the cutting ability.

[0018] Furthermore: The machining spindle assembly includes a spindle motor, a machining spindle and a front chuck. The chuck is used for clamping the crankshaft. A servo motor reducer is also fixedly connected between the spindle motor and the reduction gearbox. A rotary oil cylinder is fixedly connected to the machining spindle. A reduction gearbox is connected between the rotary oil cylinder and the spindle motor. The reduction gearbox includes a small gear connected to the servo motor reducer and a large gear connected to the rotary oil cylinder.

[0019] With the above settings: The rotary oil cylinder itself also has the effect of amplifying torque. Cooperating with the reduction gearbox, the torque upper limit of the machining spindle is also greatly improved, so that the milling machine can machine crankshafts with higher strength and greater difficulty.

[0020] Furthermore: A spindle box is fixedly connected to the base, and the machining spindle is located inside the spindle box.

[0021] With the above settings, the spindle head improves the load capacity of the machining spindle to a certain extent, enabling it to handle the large torque transmitted by the reduction gearbox to the machining spindle, thus enhancing the service life of the machining spindle.

[0022] Furthermore, the tailstock chuck assembly includes a rear chuck for fixing the crankshaft and a support base slidably connected to the base. A slide rail is provided on the base. Both the support base and the stable jaw assembly are on the slide rail. The rear chuck is rotatably connected to the support base, and a driven motor for driving the rear chuck to rotate is provided on the support base.

[0023] With the above settings, the sliding tailstock chuck assembly can adjust its position according to the length of the crankshaft to be machined, thereby enabling the milling machine to have a larger machining range. The sliding stable jaw assembly can clamp different positions of the crankshaft at different times during machining, thus providing higher stability to the machining part and ensuring machining accuracy.

[0024] In summary, the present utility model has the following beneficial effects:

[0025] By adopting a machining spindle and a tool turret spindle with high rigidity and heavy load, the rigidity of the milling machine is greatly improved, enabling it to adapt to a working environment with a larger torque for a long time, and thus increasing the upper limits of the cutting depth and accuracy during milling machine machining.

[0026] To cooperate with the high-rigidity spindle, high-rigidity castings are also used as the materials for the base and the machine housing, thereby also enhancing the overall strength of the milling machine and extending the service life of the equipment.

[0027] The multiple reduction structures provided in the machining spindle assembly and the tool turret slide assembly play a strong role in amplifying the torque of the corresponding components, thereby further enhancing the cutting depth and accuracy of the equipment. Also, because the reduction structures adopted in the above settings are relatively simple in structure, they are more convenient for maintenance and replacement.

[0028] The 45° inclination angle between the tool disc body and the base adopts a large-span structural design, which is beneficial for eliminating stress and further improving the rigidity and strength of the equipment.

[0029] The way that both the tailstock chuck assembly and the stable jaw assembly move on the base gives the milling machine greater flexibility in the size of the crankshaft that can be machined, expanding the applicable range of the milling machine.

[0030] The jaws on the chuck are hydraulically driven, and the motors for driving each component are servo motors, enabling the accuracy during the operation of the milling machine to be more precisely controlled and also facilitating the maintenance and replacement of these components. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a high-torque milling machine for machining crankshafts provided by the present utility model.

[0032] Figure 2 It is a schematic structural diagram of a high-torque milling machine for machining crankshafts provided by the present utility model after removing the machine shell.

[0033] Figure 3 It is a schematic structural diagram of the base of a high-torque milling machine for machining crankshafts provided by the present utility model;

[0034] Figure 4 It is a schematic structural diagram of the turret slide assembly of a high-torque milling machine for machining crankshafts provided by the present utility model Figure 1 ;

[0035] Figure 5 It is a schematic structural diagram of the turret slide assembly of a high-torque milling machine for machining crankshafts provided by the present utility model Figure 2 ;

[0036] Figure 6 It is a schematic structural diagram of the turret slide assembly of a high-torque milling machine for machining crankshafts provided by the present utility model Figure 3 ;

[0037] Figure 7 It is an exploded view of the main shaft of a high-torque milling machine for machining crankshafts provided by the present utility model;

[0038] Figure 8 It is a schematic structural diagram of the machining main shaft assembly of a high-torque milling machine for machining crankshafts provided by the present utility model Figure 1 ;

[0039] Figure 9 It is a schematic structural diagram of the machining main shaft assembly of a high-torque milling machine for machining crankshafts provided by the present utility model Figure 2 ;

[0040] Figure 10 It is a schematic structural diagram of the tailstock chuck assembly of a high-torque milling machine for machining crankshafts provided by the present utility model.

[0041] Explanation of reference numerals:

[0042] 1. Base; 11. Translation motor; 12. Lead screw; 13. Headstock; 2. Machine housing; 3. Machining spindle assembly; 31. Spindle motor; 32. Machining spindle; 33. Front chuck; 34. Servo motor reducer; 35. Rotary oil cylinder; 36. Reduction gearbox; 361. Pinion gear; 362. Gear; 4. Tailstock chuck assembly; 41. Rear chuck; 42. Support base; 43. Driven motor; 5. Turret slide assembly; 51. Tool disc spindle; 511. Front retaining ring; 512. Rear locking cover; 52. Driving motor; 521. Mounting seat; 522. Adjusting seat; 53. Tool disc body; 54. Planetary gear reducer; 55. Tool disc spindle housing; 551. Front seal cover; 552. Front double-row bearing; 553. Tapered bearing; 554. Sun retaining ring; 555. Rear double-row bearing; 556. Rear seal cover; 557. Washer; 558. Locking nut; 56. Pulley; 561. Upper synchronous pulley; 562. Lower synchronous pulley; 563. Transmission belt; 57. Tool disc moving seat; 571. Connecting seat; 58. Box body fixed slide; 59. Turret slide; 591. Slide motor; 6. Stable jaw assembly. Detailed implementation mode

[0043] The following further describes the present utility model in detail in conjunction with the embodiments of the accompanying drawings.

[0044] As Figures 1 to 3 shown, a high-torque milling machine for machining crankshafts includes a base 1 and a machine housing 2. The machine housing 2 adopts a sealed sheet metal design, which can prevent cutting fluid from splashing out inside. The materials of the base 1 and the machine housing 2 are high-rigidity casting materials, which can strengthen the overall structural strength and rigidity of the equipment. A machining spindle assembly 3 and a tailstock chuck assembly 4 are fixedly installed on the base 1. The machining spindle assembly 3 and the tailstock chuck assembly 4 are respectively used to fix the two ends of the crankshaft. A turret slide assembly 5 is also fixedly installed on the base 1. The turret slide assembly 5 includes a tool disc assembly, and the tool disc assembly is used to machine the crankshaft. A stable jaw assembly 6 for clamping the crankshaft is also slidably connected to the base 1. During machining, first fix the two ends of the crankshaft to be machined to the machining spindle assembly 3 and the tailstock chuck assembly 4 respectively, and then clamp the crankshaft itself with the stable jaw assembly 6 to ensure its stability during the machining process. Then start the equipment to make the crankshaft rotate synchronously with the machining spindle assembly 3. At this time, the tool disc on the turret slide assembly 5 will move to the working position to process the corresponding position of the crankshaft.

[0045] As Figures 4 to 6As shown in the figure, the cutter head assembly includes a cutter head main shaft 51, a driving motor 52, and a cutter head body 53. The cutter head body 53 is fixedly connected to the cutter head main shaft 51 and rotates synchronously with the cutter head main shaft 51. The driving motor 52 is used to drive the rotation of the cutter head main shaft 51. A planetary gear reducer 54 is arranged between the cutter head main shaft 51 and the driving motor 52. The planetary gear reducer 54 has the function of amplifying torque, which can enable the cutter head main shaft 51 to have a greater torque, so that the cutter head body 53 can obtain a greater cutting depth and higher cutting accuracy. As a result, the milling machine can machine crankshafts with higher requirements, and the machined crankshafts also have higher quality. At the same time, compared with traditional planetary gear reduction boxes, the planetary gear reducer 54 has the characteristics of simple structure and compact layout, which can save more space in layout and also reduce the difficulty of maintenance and overhaul, which is beneficial to cost savings;

[0046] As Figure 6 and Figure 7 shown in the figure, a cutter head main shaft housing 55 is sleeved outside the cutter head main shaft 51. Inside the cutter head main shaft housing 55, a front seal cover 551, a front double-row bearing 552, a tapered bearing 553, a sun retaining ring 554, a rear double-row bearing 555, and a rear seal cover 556 are arranged in sequence from near to far from the cutter head body 53. Washers 557 are arranged between the front seal cover 551 and the front double-row bearing 552, between the front double-row bearing 552 and the tapered bearing 553, and between the sun retaining ring 554 and the tapered bearing 553. A locking nut 558 is also fixedly connected between the sun retaining ring 554 and the rear double-row bearing 555. The setting of multiple bearings enables the cutter head main shaft 51 itself to bear a greater load, and thus the cutter head main shaft 51 becomes a heavy-duty main shaft to match the high torque brought by the planetary gear reducer 54, so as to ensure that the characteristics of high machining accuracy and large cutting depth of the milling machine can be fully exerted. A front retaining ring 511 is fixedly connected to the cutter head main shaft outside the cutter head main shaft housing 55 and close to the cutter head body 53, and the front retaining ring 511 is fixedly connected to the cutter head body 53. A rear locking cover 512 is fixedly connected to the cutter head main shaft outside the cutter head main shaft housing 55 and close to the planetary gear reducer 54. This setting is used to further strengthen the fixing strength between the cutter head main shaft 51, the cutter head body 53, and the planetary gear reducer 54, so as to further enhance the stability of the cutter head during the working process to ensure machining accuracy. A fixing seat is arranged on the planetary gear reducer 54. The shaft of the planetary gear reducer 54 is fixedly connected to the main shaft, and the fixing seat is fixedly connected to the rear locking cover 512. This setting enables the cutter head main shaft 51 and the planetary gear reducer 54 to have a double connection between the internal shaft and the external seat, further strengthening the fixing strength between the two and improving the integrity of the equipment.

[0047] As Figure 5 and Figure 6As shown, the drive motor 52 is located above the planetary gear reducer 54. The drive motor 52 and the planetary gear reducer 54 are driven by a pulley 56. The pulley 56 includes an upper synchronous pulley 561 connected to the drive motor 52 and a lower synchronous pulley 562 connected to the planetary gear reducer 54. The upper synchronous pulley 561 and the lower synchronous pulley 562 are jointly connected by a transmission belt 563. The diameter of the upper synchronous pulley 561 is smaller than that of the lower synchronous pulley 562. The setting of the smaller driving wheel and the larger driven wheel makes the pulley 56 also have a speed reduction effect, so that the torque can be initially amplified. Cooperating with the planetary gear reducer 54, the upper limit of the maximum torque of the cutter head spindle 51 is increased, so that the upper limit of the product requirements that the milling machine can process is also greatly improved. The drive motor 52 includes a mounting seat 521 and an adjusting seat 522. The adjusting seat 522 is used to adjust the position of the drive motor 52. The adjusting seat 522 is installed above the mounting seat 521. The mounting seat 521 is fixedly connected to the top surface of the cutter head spindle housing 55. This setting makes the connection relationship between the drive motor 52, the pulley 56, the planetary gear reducer 54, the cutter head spindle 51 and the cutter head body 53 closer and firmer, thereby improving the integrity of the entire turret slide assembly 5, reducing the vibration that will occur during the processing, and further improving the accuracy.

[0048] As Figure 3 and Figure 4 shown, the turret slide assembly 5 further includes a cutter head moving seat 57 slidably connected to the base 1. A translation motor 11 is provided on the base 1. The output end of the translation motor 11 is fixedly connected to a lead screw 12. A connecting seat 571 for threadedly connecting with the lead screw 12 and moving along the lead screw 12 is fixed to the bottom of the cutter head moving seat 57. The sliding cutter head moving seat 57 enables the cutter head to adjust its position with the progress of processing, so as to achieve a follow-up effect. Compared with the slide rail and the push rod, the lead screw has higher precision and can accurately control its moving distance, thereby further enhancing the processing precision of the milling machine. The cutter head moving seat 57 is inclined at 45° relative to the base 1. The large-span design with a 45° inclination is beneficial to eliminating stress, so that the rigidity and strength of the milling machine are guaranteed. A housing fixed slide 58 is fixedly connected below the cutter head spindle housing 55. A turret slide 59 is fixedly connected to the cutter head moving seat 57. The housing fixed slide 58 is slidably connected to the turret slide 59. A slide motor 591 for driving the housing fixed slide 58 to slide is provided on the turret slide 59. This setting enables the cutter head to slide along the cutter head slide in the 45° direction.

[0049] As Figure 8 and Figure 9As shown in the figure, the machining spindle assembly 3 includes a spindle motor 31, a machining spindle 32, and a front chuck 33. A spindle box 13 is fixedly connected to the base 1. The machining spindle 32 is located inside the spindle box 13. The machining spindle 32 also adopts a heavy-duty spindle. The chuck is used to clamp the crankshaft. A servo motor reducer 34 is fixedly connected between the spindle motor 31 and the reduction gearbox 36. A rotary oil cylinder 35 is fixedly connected to the machining spindle 32. A reduction gearbox 36 is connected between the rotary oil cylinder 35 and the spindle motor 31. The reduction gearbox 36 includes a pinion 361 connected to the servo motor reducer 34 and a large gear 362 connected to the rotary oil cylinder 35. This setting enables the machining spindle 32 to also obtain the deceleration effect under the combined action of the servo motor reducer 34, the reduction gearbox 36, and the rotary oil cylinder 35, so as to obtain a greater torque, improve the upper limit of the workpieces that the milling machine can process, and thus enable the milling machine to have a larger applicable range.

[0050] As Figure 10 shown in the figure, the tailstock chuck assembly 4 includes a rear chuck 41 for fixing the crankshaft and a support seat 42 slidably connected to the base 1. A slide rail is provided on the base 1. The support seat 42 and the stable jaw assembly 6 are both on the slide rail. The rear chuck 41 is rotatably connected to the support seat 42. A driven motor 43 for driving the rear chuck 41 to rotate is provided on the support seat 42. The slidable tailstock chuck assembly 4 can adjust its own position, so that the milling machine can process crankshafts of different lengths, improving the flexibility of the milling machine. The sliding of the stable jaw assembly 6 enables it to clamp different parts of the crankshaft at different stages of machining, thereby improving the stability of the machining part and further improving the product quality.

[0051] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope of the present utility model is subject to the claims. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.

Claims

1. A high torque milling machine for machining a crankshaft, comprising a base (1) and a housing (2), wherein a machining spindle assembly (3) and a tailstock chuck assembly (4) are fixedly mounted on the base (1), wherein the machining spindle assembly (3) and the tailstock chuck assembly (4) are respectively used to fix two ends of the crankshaft, wherein a turret slide assembly (5) is also fixedly mounted on the base (1), wherein the turret slide assembly (5) comprises a cutter head assembly, wherein the cutter head assembly is used to machine the crankshaft, wherein a stable clamping jaw assembly (6) for clamping the crankshaft is also slidably connected to the base (1), wherein the stable clamping jaw assembly (6) is used to clamp the crankshaft, and wherein the stable clamping jaw assembly (6) is slidably connected to the base (1), wherein the stable clamping jaw assembly (6) is used to clamp the crankshaft, and wherein the stable clamping jaw assembly (6) is slidably connected to the base (1), and ... The cutter disc assembly comprises a cutter disc main shaft (51), a drive motor (52) and a cutter disc body (53); the cutter disc body (53) is fixedly connected to the cutter disc main shaft (51) and rotates synchronously with the cutter disc main shaft (51); the drive motor (52) is used to drive the cutter disc main shaft (51) to rotate; a planetary gear reducer (54) is provided between the cutter disc main shaft (51) and the drive motor (52); a cutter disc main shaft housing (55) is provided on the outer sleeve of the cutter disc main shaft (51); the cutter disc main shaft housing (55) is 1.5 meters in diameter and 1.5 meters in width from the cutter disc main shaft (53); A front sealing cover (551), a front double-row bearing (552), a tapered bearing (553), a sun ring (554), a rear double-row bearing (555) and a rear sealing cover (556) are sequentially arranged from near to far. Washers (557) are arranged between the front sealing cover (551) and the front double-row bearing (552), between the front double-row bearing (552) and the tapered bearing (553), and between the sun ring (554) and the tapered bearing (553). A locking nut (558) is also fixedly connected between the sun ring (554) and the rear double-row bearing (555).

2. The high torque milling machine for machining crankshafts according to claim 1, characterized in that: A front retaining ring (511) is fixedly connected to the main shaft outside the cutter disc spindle housing (55) and close to the cutter disc body (53); the front retaining ring (511) is fixedly connected to the cutter disc body (53); a rear locking cover (512) is fixedly connected to the main shaft outside the cutter disc spindle housing (55) and close to the planetary gear reducer (54); a fixing seat is provided on the planetary gear reducer (54); the shaft of the planetary gear reducer (54) is fixedly connected to the main shaft; and the fixing seat is fixedly connected to the rear locking cover (512).

3. The high torque milling machine for machining crankshafts according to claim 1, characterized in that: The drive motor (52) is located above the planetary gear reducer (54); the drive motor (52) is driven between the planetary gear reducer (54) via a pulley (56); the pulley (56) comprises an upper synchronous wheel (561) connected to the drive motor (52) and a lower synchronous wheel (562) connected to the planetary gear reducer (54); the upper synchronous wheel (561) and the lower synchronous wheel (562) are connected to a transmission belt (563); the diameter of the upper synchronous wheel (561) is smaller than the diameter of the lower synchronous wheel (562).

4. The high torque milling machine for machining crankshafts according to claim 3, characterized in that: The drive motor (52) comprises a mounting seat (521) and an adjustment seat (522), wherein the adjustment seat (522) is used to adjust the position of the drive motor (52), and the adjustment seat (522) is mounted above the mounting seat (521), and the mounting seat (521) is fixedly connected to the top surface of the cutter head spindle housing (55).

5. The high torque milling machine for machining crankshafts according to claim 1, characterized in that: The turret slide assembly (5) further comprises a cutter disc moving seat (57) slidably connected to the base (1); a translation motor (11) is arranged on the base (1); an output end of the translation motor (11) is fixedly connected to a lead screw (12); and a connecting seat (571) for being threadedly connected to the lead screw (12) and moving along the lead screw (12) is fixedly provided at the bottom of the cutter disc moving seat (57).

6. The high torque milling machine for machining crankshafts according to claim 5, characterized in that: The tool disc movable seat (57) is inclined at 45 degrees relative to the base (1); a box-fixed slide (58) is fixedly connected to the bottom of the tool disc spindle box (55); a turret slide (59) is fixedly connected to the tool disc movable seat (57); the box-fixed slide (58) is slidably connected to the turret slide (59); and a slide motor (591) is provided on the turret slide (59) for driving the box-fixed slide (58) to slide.

7. The high torque milling machine for machining crankshafts according to claim 1, characterized in that: The machining spindle assembly (3) comprises a spindle motor (31), a machining spindle (32) and a front chuck (33), wherein the chuck is used to clamp a crankshaft, and a rotary cylinder (35) is fixedly connected to the machining spindle (32), a reduction gear box (36) is connected between the rotary cylinder (35) and the spindle motor (31), and a servo motor reducer (34) is also fixedly connected between the spindle motor (31) and the reduction gear box (36), and the reduction gear box (36) comprises a small gear (361) connected to the servo motor reducer (34) and a large gear (362) connected to the rotary cylinder (35).

8. The high torque milling machine for machining crankshafts according to claim 7, characterized in that: A spindle box (13) is fixedly connected to the base (1), and the machining spindle (32) is located in the spindle box (13).

9. The high torque milling machine for machining crankshafts according to claim 1, characterized in that: The tailstock chuck assembly (4) comprises a rear chuck (41) for fixing the crankshaft and a support seat (42) slidably connected to the base (1); a slide rail is provided on the base (1); the support seat (42) and the stabilizing jaw assembly (6) are both on the slide rail; the rear chuck (41) is rotatably connected to the support seat (42); and a driven motor (43) is provided on the support seat (42) for driving the rear chuck (41) to rotate.

Images