A four-column servo press for components

Abstract

The present invention relates to the technical field of knuckle press-fitting, and in particular to a four-column type servo press for components, which includes a servo electric cylinder and a flat plate fixed to its telescopic end, and a pressing cylinder is fixed to the lower side of the flat plate. The present invention further includes: a coaxial positioning mechanism arranged at the middle section of the pressing cylinder; an inclined power-off device electrically connected to the circuit of the servo electric cylinder; and an inclined sensing mechanism arranged at the lower end of the pressing cylinder. Through the inclined sensing mechanism of the present invention, as the pressing cylinder moves downward, before the pressing cylinder contacts the wheel axle, the angle of the wheel axle can be detected in advance. When the wheel axle generates a certain inclination and is not coaxial with the knuckle shaft hole, the power supply line of the servo electric cylinder is quickly disconnected through the inclined power-off mechanism, so that the servo electric cylinder immediately powers off and stops running, thereby stopping driving the pressing cylinder to move downward, thereby stopping applying pressure to the inclined wheel axle, thereby avoiding deformation of the inclined wheel axle after being pressured, and thus can well avoid the generation of defective products and reduce the defective rate.

Description

Technical Field

[0001] The invention relates to the technical field of steering knuckle press-fitting, in particular to a four-column type component servo press-fitting machine. Background Art

[0002] The steering knuckle is an important component in the chassis suspension system of the car. The function of the steering knuckle is to transmit and bear the front load of the car, support and drive the front wheel to rotate around the kingpin to make the car turn. For front-wheel drive cars, the steering knuckle needs to be responsible for steering and driving, and a spline sleeve needs to be installed inside its shaft hole. For rear-wheel drive cars, the front wheels only need to be responsible for steering and do not need to be driven, so the wheel axle needs to be pressed into the steering knuckle shaft hole by a press machine, and the front wheels are connected through the wheel axle.

[0003] After searching, a Chinese patent with publication number: CN219967020U discloses a car steering knuckle bushing press, including a press body, the press body includes a bottom cabinet, vertical plates are fixedly installed on both sides of the top of the bottom cabinet, a top cabinet is fixedly installed on the top of the vertical plate, a hydraulic cylinder is arranged on the top of the top cabinet, a pressure head is connected and installed below the top cabinet and at the output end of the hydraulic cylinder, a control panel is arranged on one side of the top cabinet, a workbench is connected and installed on the top of the bottom cabinet and located between the two vertical plates through a buffer assembly, a clamping assembly is arranged inside and on the top of the workbench, and a pressure detection assembly for conveniently controlling the force is arranged on one side of the clamping assembly.

[0004] Based on the above search and combined with actual problems, it was found that: the press cannot detect the inclination of the wheel axle, because before pressing, the worker needs to place the steering knuckle on the table, and then align the lower end of the wheel axle with the end face of the steering knuckle shaft hole, and then apply pressure to the wheel axle through the press. However, in actual operation, it is difficult for workers to keep the wheel axle in a completely vertical state, and thus it is difficult to ensure that the wheel axle and the steering knuckle shaft hole remain coaxial. If the wheel axle has a slight inclination angle, after being subjected to the pressure of the press, the force on its lower end and the inner wall of the steering knuckle shaft hole is uneven, which not only makes it difficult to press in, but also easily causes the end of the wheel axle and the inner wall of the steering knuckle shaft hole to be squeezed and scratched, resulting in deformation of the steering knuckle and the wheel axle, thereby increasing the defective rate of steering knuckle production. Summary of the invention

[0005] The object of the present invention is to provide a four-column type parts servo press machine to solve the problems raised in the above-mentioned background technology.

[0006] The technical solution of the present invention is: a four-column type servo press for parts, including a servo electric cylinder and a flat plate fixed to its telescopic end, and a pressing cylinder is fixed to the lower side of the flat plate. It further includes: a coaxial positioning mechanism arranged at the middle position of the pressing cylinder; an inclined power-off device electrically connected to the circuit of the servo electric cylinder; an inclined induction mechanism arranged at the lower end of the pressing cylinder; the inclined induction mechanism includes a plurality of sector pressing plates movably arranged at the lower end of the pressing cylinder, and a plurality of switches installed on the outer side of the pressing cylinder. A push plate is fixed to the outer side of each sector pressing plate; the inclined power-off device includes a housing, a plurality of sliding cylinders are movably arranged inside the housing, and a connecting piece one and a connecting piece two are respectively connected to both sides of each sliding cylinder. The connecting piece one and the connecting piece two on the same sliding cylinder are electrically connected through a wire. An electromagnet is installed at the lower position of each sliding cylinder inside the housing, and a positive conductive bar and a negative conductive bar are respectively installed at both ends inside the housing.

[0007] Preferably, small holes are respectively opened at the lower end of the pressing cylinder corresponding to each sector pressing plate, large holes are arranged at the upper ends of each small hole, two suspension rods extending into the inner side of the small hole are fixed to the upper side of each sector pressing plate, and a limiting ring slidably adapted to the inner side of the corresponding large hole is fixed to the outer side of each suspension rod.

[0008] Preferably, the number of the switches is the same as that of the electromagnets, and the plurality of switches are electrically connected to the control circuits of the plurality of electromagnets respectively.

[0009] Preferably, inserting rods are respectively fixed at the positions corresponding to each sliding cylinder inside the housing, the plurality of sliding cylinders are respectively sleeved on the outer sides of the plurality of inserting rods in a sliding manner, and each sliding cylinder is made of an insulating material component. An armature is fixed to the lower end of each sliding cylinder.

[0010] Preferably, one end of each sliding cylinder is elastically connected to the inside of the housing through a spring.

[0011] Preferably, the coaxial positioning mechanism includes an annular shell fixed to the outer side of the pressing cylinder, a plurality of sliding rods slidably inserted on the outer side of the pressing cylinder and located inside the annular shell. A rotating ring is rotatably connected to the inside of the annular shell. The rotating ring is respectively rotatably connected to one ends of the plurality of sliding rods through a plurality of connecting rods. A positioning rod is fixed to the other end of each sliding rod. Rollers are rotatably connected to both ends of each positioning rod. A driving mechanism for driving the rotating ring to rotate is arranged between the rotating ring and the annular shell.

[0012] Preferably, the driving mechanism includes a motor installed on the outer side of the annular shell and an internal gear ring fixed to the inner edge of the rotating ring. A driving gear meshing with the internal gear ring is fixed to the driving end of the motor.

[0013] Preferably, each positioning rod is arranged at a vertical angle.

[0014] Preferably, the servo electric cylinder is installed on the upper plate. The lower side of the upper plate is fixed with a lower plate through four columns. The upper side of the flat plate is fixed with a plurality of guide rods that penetrate and are slidably connected inside the upper plate.

[0015] Preferably, a positioning seat is fixed at the position below the pressing cylinder on the upper side of the lower plate. A plurality of positioning pins are fixed on the upper side of the positioning seat. The plurality of positioning pins are used to penetrate the screw holes of the steering knuckle to position the steering knuckle.

[0016] The present invention provides a four-column type servo press for parts through improvement. Compared with the prior art, it has the following improvements and advantages:

[0017] First: Through the inclination sensing mechanism of the present invention, as the pressing cylinder moves downward, before the pressing cylinder contacts the wheel shaft, the angle of the wheel shaft can be detected in advance. When the wheel shaft is coaxial with the shaft hole of the steering knuckle, the servo electric cylinder can drive the pressing cylinder to continue moving downward to press the wheel shaft. When the wheel shaft generates a certain inclination and is not coaxial with the shaft hole of the steering knuckle, the power supply line of the servo electric cylinder is quickly disconnected through the inclination power-off mechanism, so that the servo electric cylinder immediately powers off and stops running, thus stopping driving the pressing cylinder to move downward, thus stopping applying pressure to the inclined wheel shaft, thus avoiding deformation of the inclined wheel shaft after being pressured, and thus can well avoid the generation of defective products and reduce the defective rate.

[0018] Second: Through the coaxial positioning mechanism of the present invention, before the pressing cylinder applies pressure to the wheel shaft, the wheel shaft can be positioned in advance to keep the wheel shaft in a vertical angle, so that the axis center line of the wheel shaft coincides with that of the shaft hole of the steering knuckle. Therefore, the coaxiality of the wheel shaft and the shaft hole of the steering knuckle is also ensured, preventing the wheel shaft from tilting. This not only facilitates the wheel shaft to be more smoothly pressed into the inner side of the shaft hole of the steering knuckle, but also can well avoid scratches and deformation on the end face of the wheel shaft and the inner wall of the shaft hole of the steering knuckle due to uneven force caused by the inclined placement of the wheel shaft, thus further reducing the defective rate of the production of the steering knuckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the structural schematic diagram of the first perspective of the present invention;

[0021] Figure 2 is the structural schematic diagram of the second perspective of the present invention;

[0022] Figure 3 is of the present inventionFigure 2 Schematic diagram of the enlarged structure at A in the [device / component name];

[0023] Figure 4 Schematic diagram of the partial sectional structure of the present invention;

[0024] Figure 5 of the present invention Figure 4 Schematic diagram of the enlarged structure at B in the [device / component name];

[0025] Figure 6 Schematic diagram of the structure of the inclined power-off mechanism in the present invention;

[0026] Figure 7 Schematic diagram of the structure in the state where multiple sliding cylinders move simultaneously in the present invention;

[0027] Figure 8 Schematic diagram of the mechanism structure in the moving state of any one sliding cylinder in the present invention;

[0028] Figure 9 Schematic diagram of the structure in the state where the wheel axle is inclined in the present invention;

[0029] Figure 10 Schematic diagram of the steering knuckle and the wheel axle in the present invention.

[0030] Reference numerals:

[0031] 1. Servo electric cylinder; 2. Flat plate; 3. Pressing cylinder; 4. Housing; 5. Positive conductive bar; 6. Negative conductive bar; 7. Sliding cylinder; 8. Connecting piece one; 9. Connecting piece two; 10. Electromagnet; 11. Spring; 12. Plug rod; 13. Upper plate; 14. Column; 15. Lower plate; 16. Guide rod; 17. Positioning seat; 18. Positioning pin; 19. Conducting wire; 20. Armature; 101. Sector pressing plate; 102. Pushing plate; 103. Switch; 104. Small hole; 105. Large hole; 106. Suspension rod; 107. Limiting ring; 201. Ring-shaped shell; 202. Rotating ring; 203. Slide bar; 204. Connecting rod; 205. Positioning rod; 206. Roller; 207. Motor; 208. Internal gear ring; 209. Driving gear. Detailed implementation manners

[0032] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0033] The present invention provides a four-column type servo press for parts by improvement. The technical solution of the present invention is as follows:

[0034] As Figures 1 to 10 shown, an embodiment of the present invention provides a four-column servo press for parts, including a servo electric cylinder 1 and a flat plate 2 fixed to its telescopic end, and a pressing cylinder 3 is fixed to the lower side of the flat plate 2. The servo electric cylinder 1 is installed on an upper plate 13, and a lower plate 15 is fixed to the lower side of the upper plate 13 through four columns 14. A plurality of guide rods 16 that penetrate and are slidably connected to the inside of the upper plate 13 are fixed to the upper side of the flat plate 2. It further includes: a coaxial positioning mechanism provided at the middle position of the pressing cylinder 3; an inclined power-off device electrically connected to the circuit of the servo electric cylinder 1; an inclined induction mechanism provided at the lower end of the pressing cylinder 3. The inclined induction mechanism includes a plurality of sector-shaped pressing plates 101 movably provided at the lower end of the pressing cylinder 3 and a plurality of switches 103 installed on the outer side of the pressing cylinder 3. A push plate 102 is fixed to the outer side of each sector-shaped pressing plate 101; the inclined power-off device includes a housing 4, and a plurality of sliding cylinders 7 (as Figure 6 shown) are movably provided inside the housing 4, and a first connecting piece 8 and a second connecting piece 9 are respectively connected to both sides of each sliding cylinder 7. The first connecting piece 8 and the second connecting piece 9 located on the same sliding cylinder 7 are electrically connected through a wire 19. An electromagnet 10 is installed at the lower position of each sliding cylinder 7 inside the housing 4. The number of switches 103 is the same as that of the electromagnets 10, and a plurality of switches 103 are respectively electrically connected to the control circuits of a plurality of electromagnets 10, and a positive conductive bar 5 and a negative conductive bar 6 are respectively installed at both ends inside the housing 4.

[0035] Further, two small holes 104 (as Figure 5 shown) are opened at the lower end of the pressing cylinder 3 corresponding to the position of each sector-shaped pressing plate 101. A large hole 105 is provided at the upper end of each small hole 104. Two suspension rods 106 extending to the inside of the small holes 104 are fixed to the upper side of each sector-shaped pressing plate 101. A limiting ring 107 that is slidably adapted to the inside of the corresponding large hole 105 is fixed to the outer side of each suspension rod 106;

[0036] The suspension rods 106 play a guiding role in the movement of the sector-shaped pressing plates 101, keeping the sector-shaped pressing plates 101 moving vertically up and down. The limiting rings 107 can slide up and down inside the large holes 105. When the plurality of limiting rings 107 respectively contact the bottom ends of the corresponding large holes 105, the plurality of sector-shaped pressing plates 101 move down to the lowest point, and the plurality of sector-shaped pressing plates 101 have the same height, so as to facilitate simultaneous contact with the lower end of the wheel axle (as Figure 10 shown).

[0037] Further, a plug rod 12 is fixed to the inside of the housing 4 corresponding to the position of each sliding cylinder 7. The plurality of sliding cylinders 7 are respectively sleeved on the outer sides of the plurality of plug rods 12, and each sliding cylinder 7 is made of an insulating material member. An armature 20 is fixed to the lower end of each sliding cylinder 7;

[0038] The sliding cylinder 7 can be vertically moved up and down through the insertion rod 12, ensuring that the connecting piece one 8 and the connecting piece two 9 on both sides of it can stably separate from or combine with the adjacent connecting piece two 9 and connecting piece one 8. When the electromagnet 10 is energized, it can generate a magnetic attraction force on the armature 20, thereby attracting the armature 20 and the sliding cylinder 7 to move downward.

[0039] Furthermore, one end of each sliding cylinder 7 is elastically connected to the inner side of the housing 4 through a spring 11;

[0040] When the sliding cylinder 7 and the armature 20 move downward, the spring 11 is compressed. When the electromagnet 10 is powered off and loses the electromagnetic attraction force on the armature 20, the sliding cylinder 7 and the armature 20 can move upward and reset under the action of the spring 11.

[0041] Furthermore, the coaxial positioning mechanism includes an annular housing 201 fixed to the outside of the pressure cylinder 3, a plurality of sliding rods 203 slidably inserted on the outside of the pressure cylinder 3 and located inside the annular housing 201. A rotating ring 202 is rotatably connected to the inner side of the annular housing 201. The rotating ring 202 is respectively rotatably connected to one end of the plurality of sliding rods 203 through a plurality of connecting rods 204. A positioning rod 205 is fixed to the other end of each sliding rod 203. A roller 206 is rotatably connected to both ends of each positioning rod 205. A driving mechanism for driving the rotating ring 202 to rotate is provided between the rotating ring 202 and the annular housing 201. The driving mechanism includes a motor 207 installed on the outside of the annular housing 201 and an internal gear ring 208 fixed to the inner edge of the rotating ring 202. The driving end of the motor 207 is fixed with a driving gear 209 meshing with the internal gear ring 208.

[0042] Through the coaxial positioning mechanism, before the pressure cylinder 3 applies pressure to the wheel axle, the wheel axle can be positioned in advance to keep the wheel axle at a vertical angle, so that the axis of the wheel axle coincides with the axis of the shaft hole of the steering knuckle. Therefore, the coaxiality of the wheel axle and the shaft hole of the steering knuckle is also ensured, preventing the wheel axle from tilting. This not only facilitates the wheel axle to be more smoothly pressed into the inner side of the shaft hole of the steering knuckle, but also can well avoid scratches and deformations on the end face of the wheel axle and the inner wall of the shaft hole of the steering knuckle caused by uneven force due to the inclined placement of the wheel axle, thereby further reducing the defective rate of steering knuckle production.

[0043] Furthermore, each positioning rod 205 is set at a vertical angle;

[0044] The positioning rod 205 is set at a vertical angle. Therefore, the connection line between the two rollers 206 at both ends of it is at a vertical angle. Therefore, under the positioning action of the plurality of rollers 206, the wheel axle can be kept at a vertical angle, so that the axis of the wheel axle coincides with the axis of the shaft hole of the steering knuckle. Therefore, the coaxiality of the wheel axle and the shaft hole of the steering knuckle is also ensured, preventing the wheel axle from tilting.

[0045] Further, a positioning seat 17 is fixed at the lower position of the upper side of the lower plate 15 and below the pressing cylinder 3. A plurality of positioning pins 18 are fixed on the upper side of the positioning seat 17. The plurality of positioning pins 18 are used to penetrate the threaded holes of the steering knuckle to position the steering knuckle (as Figure 10 shown);

[0046] The plurality of positioning pins 18 can be inserted into the inner sides of a plurality of threaded holes on the steering knuckle, so that the steering knuckle can be positioned, preventing the steering knuckle from shifting during press-fitting, so that the wheel axle can be smoothly pressed into the inner side of the steering knuckle axle hole.

[0047] Working principle: During use, place the steering knuckle body on the upper side of the positioning seat 17, and make the plurality of positioning pins 18 pass through the plurality of threaded holes of the steering knuckle. Then place the wheel axle to be pressed into the inner side of the steering knuckle axle hole at one end of the axle hole of the steering knuckle. Then control the telescopic end of the servo electric cylinder 1 to extend. The telescopic end of the servo electric cylinder 1 drives the flat plate 2 to move downward. The flat plate 2 drives the pressing cylinder 3 below it to move downward. The lower end of the pressing cylinder 3 can apply pressure to the edge position of the wheel axle, so as to press one end of the wheel axle into the inner side of the steering knuckle axle hole;

[0048] In order to avoid the non-coaxiality between the wheel axle and the steering knuckle axle hole when the worker places the wheel axle, when the lower end of the pressing cylinder 3 approaches the surface of the wheel axle, at this time, control the motor 207 of the coaxial positioning mechanism to operate and drive the driving gear 209 to rotate. The driving gear 209 drives the internal gear ring 208 and the rotating ring 202 to rotate through tooth engagement. When the rotating ring 202 rotates, it respectively pushes a plurality of sliding rods 203 to move synchronously toward the inside of the pressing cylinder 3 through a plurality of connecting rods 204. The plurality of sliding rods 203 respectively drive the positioning rods 205 at one end to merge synchronously, so that the rollers 206 at both ends of each positioning rod 205 are attached to the outer side of the wheel axle. Since each positioning rod 205 is arranged at a vertical angle, the connection line between the two rollers 206 at both ends of the same positioning rod 205 is at a vertical angle. Therefore, under the positioning action of the plurality of rollers 206, the wheel axle can be kept at a vertical angle, so that the axis of the wheel axle coincides with the axis of the steering knuckle axle hole, thus ensuring the coaxiality between the wheel axle and the steering knuckle axle hole and preventing the wheel axle from tilting (as Figure 9 shown); Therefore, the positioning action of the plurality of rollers 206 not only facilitates the wheel axle to be more smoothly pressed into the inner side of the steering knuckle axle hole, but also can well avoid the uneven force caused by the inclined placement of the wheel axle, resulting in scratches and deformation on the end face of the wheel axle and the inner wall of the steering knuckle axle hole, and can well reduce the defective rate of the production of the steering knuckle;

[0049] Since multiple positioning rods 205 are all rollingly connected to the outer side of the axle through rollers 206 at both ends, when the multiple rollers 206 apply pressure to the outer side of the axle for positioning, the pressing cylinder 3 can also continue to move downward to apply pressure to the axle. Therefore, during the press-fitting process of the axle, a uniform squeezing force is always applied to the side surface of the axle, effectively preventing the axle from tilting again due to uneven pressure distribution, thereby further improving the stability of the axle angle during the press-fitting process and avoiding deformation of the axle and the steering knuckle axle hole caused by the tilting of the axle when it is pressed.

[0050] As the pressing cylinder 3 continues to move downward, before the lower end of the pressing cylinder 3 contacts the axle, the multiple sector-shaped pressing plates 101 of the tilt sensing mechanism first contact the axle. If the axle is completely coaxial with the steering knuckle axle hole, the multiple sector-shaped pressing plates 101 will simultaneously contact the lower end of the axle. At this time, the multiple sector-shaped pressing plates 101 will drive the corresponding suspension rods 106 to move upward respectively under the reaction force of the axle. At the same time, the multiple sector-shaped pressing plates 101 will move upward synchronously until their upper sides contact the lower surface of the pressing cylinder 3. At the same time, the multiple sector-shaped pressing plates 101 will drive the outer push plates 102 to move upward simultaneously. The multiple push plates 102 will respectively trigger the switches 103 at corresponding positions, and the circuits of each switch 103 can be simultaneously turned on. Thus, through the control circuit, the multiple electromagnets 10 in the tilt power-off device are controlled to be simultaneously energized and generate magnetic attraction forces on the multiple armatures 20. After being subjected to the magnetic attraction forces, the multiple armatures 20 drive the corresponding sliding cylinders 7 to move downward synchronously. The multiple sliding cylinders 7 drive the connecting pieces one 8 and connecting pieces two 9 on both sides to move downward synchronously, so that electrical connections can be made between every two adjacent sliding cylinders 7 through the connecting pieces one 8 and connecting pieces two 9. The two sliding cylinders 7 at both ends are respectively electrically connected to the positive conductive bar 5 and the negative conductive bar 6 through the connecting pieces one 8 and connecting pieces two 9 on one side, so that the positive conductive bar 5 and the negative conductive bar 6 are kept in a conducting state. The positive conductive bar 5 and the negative conductive bar 6 are connected in series with the power supply line of the servo cylinder 1. When the positive conductive bar 5 and the negative conductive bar 6 are kept in a conducting state, the servo cylinder 1 can continue to be powered on and operate, so that the telescopic end of the servo cylinder 1 continues to move downward to drive the pressing cylinder 3 to move downward, and the pressing cylinder 3 can press the axle into the inner side of the steering knuckle axle hole to complete the press-fitting operation.

[0051] If the axle is not coaxial with the steering knuckle axle hole due to placement error, that is, the axle generates a certain tilt (such as Figure 9 the tilt state shown), at this time, the multiple sector-shaped pressing plates 101 of the tilt sensing mechanism will not simultaneously contact the lower end of the axle. At this time, the sector-shaped pressing plate 101 with the highest lifting height near the lower end of the axle will first contact the lower end of the axle, so that one switch 103 at the corresponding position will be powered on first, thereby controlling one electromagnet 10 electrically connected to it to be powered on first to generate a magnetic attraction force (such as Figure 8As shown, a corresponding sliding cylinder 7 is driven to move downward first, and this sliding cylinder 7 drives the connecting pieces one 8 and the connecting pieces two 9 on both sides thereof to move downward simultaneously, so that the connecting pieces one 8 and the connecting pieces two 9 located on both sides of this sliding cylinder 7 are separated from the adjacent connecting pieces two 9 and the connecting pieces one 8 respectively, so that the circuit between the positive conductive bar 5 and the negative conductive bar 6 is disconnected, so that the power circuit of the servo cylinder 1 is disconnected. At this time, the servo cylinder 1 immediately loses power and stops running, so as to stop driving the pressing cylinder 3 to continue moving downward, so as to stop applying pressure to the inclined wheel shaft, so as to avoid deformation of the inclined wheel shaft after being subjected to pressure, so that the generation of defective products can be well avoided and the defective rate can be reduced.

[0052] The foregoing description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A four-column servo press machine for parts, comprising a servo electric cylinder (1) and a plate (2) to which the telescopic end thereof is fixed, and a pressing cylinder (3) is fixed on the lower side of the plate (2), characterized in that: Also includes: A coaxial positioning mechanism arranged at the middle section of the pressing cylinder (3); A tilt cut-off device electrically connected to the circuit of the servo cylinder (1); A tilt sensing mechanism arranged at the lower end of the pressing cylinder (3); The tilt sensing mechanism comprises a plurality of fan-shaped pressing plates (101) movably arranged at the lower end of the pressing cylinder (3), and a plurality of switches (103) installed on the outside of the pressing cylinder (3), and a push plate (102) is fixed on the outside of each fan-shaped pressing plate (101); The inclined power-off device comprises a shell (4), a plurality of slides (7) are movably arranged on the inner side of the shell (4), and a connecting piece 1 (8) and a connecting piece 2 (9) are respectively connected to both sides of each slide (7), and the connecting piece 1 (8) and the connecting piece 2 (9) located on the same slide (7) are electrically connected via a wire (19), an electromagnet (10) is installed on the inner side of the shell (4) at a position below each slide (7), and a positive conductive strip (5) and a negative conductive strip (6) are respectively installed at both ends of the inner side of the shell (4).

2. The four-column servo press machine for parts according to claim 1, characterized in that: A small hole (104) is provided at the lower end of the pressure cylinder (3) corresponding to the position of each fan-shaped pressure plate (101), and a large hole (105) is provided at the upper end of each small hole (104). Two suspension rods (106) extending to the inner side of the small hole (104) are fixed on the upper side of each fan-shaped pressure plate (101), and a limiting ring (107) slidingly adapted to the inner side of the large hole (105) at the corresponding position is fixed on the outer side of each suspension rod (106).

3. The four-column servo press machine for parts according to claim 1, characterized in that: The number of the switches (103) and the number of the electromagnets (10) are the same, and the multiple switches (103) are electrically connected to the control circuits of the multiple electromagnets (10) respectively.

4. The four-column servo press machine for parts according to claim 1, characterized in that: An insertion rod (12) is fixed on the inner side of the shell (4) at a position corresponding to each slide cylinder (7), and the plurality of slide cylinders (7) are respectively slidably sleeved on the outer sides of the plurality of insertion rods (12), and each slide cylinder (7) is made of insulating material, and an armature (20) is fixed at the lower end of each slide cylinder (7).

5. The four-column servo press machine for parts according to claim 1, characterized in that: One end of each slide cylinder (7) is elastically connected to the inner side of the housing (4) via a spring (11).

6. The four-column servo press machine for parts according to claim 1, characterized in that: The coaxial positioning mechanism comprises an annular shell (201) fixed on the outside of the pressing cylinder (3), a plurality of sliding rods (203) slidably inserted on the outside of the pressing cylinder (3) and located on the inside of the annular shell (201); a rotating ring (202) is rotatably connected to the inner side of the annular shell (201); the rotating ring (202) is rotatably connected to one end of the plurality of sliding rods (203) through a plurality of connecting rods (204); a positioning rod (205) is fixed to the other end of each of the sliding rods (203); both ends of each of the positioning rods (205) are rotatably connected to rollers (206); and a driving mechanism for driving the rotating ring (202) to rotate is provided between the rotating ring (202) and the annular shell (201).

7. The four-column servo press machine for parts according to claim 6, characterized in that: The driving mechanism comprises a motor (207) mounted on the outside of the annular shell (201) and an inner gear ring (208) fixed to the inner edge of the rotating ring (202); a driving gear (209) meshing with the inner gear ring (208) is fixed to the driving end of the motor (207).

8. The four-column servo press machine for parts according to claim 6, characterized in that: Each positioning rod (205) is arranged at a vertical angle.

9. The four-column servo press machine for parts according to claim 1, characterized in that: The servo electric cylinder (1) is mounted on an upper plate (13), a lower plate (15) is fixed to the lower side of the upper plate (13) via four columns (14), and a plurality of guide rods (16) penetrating and slidably connected to the interior of the upper plate (13) are fixed to the upper side of the flat plate (2).

10. The four-column servo press machine for parts according to claim 9, characterized in that: A positioning seat (17) is fixed on the upper side of the lower plate (15) at a position below the pressure cylinder (3), and a plurality of positioning pins (18) are fixed on the upper side of the positioning seat (17). The plurality of positioning pins (18) are used to penetrate the screw holes of the steering knuckle to position the steering knuckle.

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