Four-stand-column type part servo press-fitting machine

Abstract

The invention relates to the technical field of steering knuckle press fitting, in particular to a four-stand-column type part servo press fitting machine which comprises a servo electric cylinder and a flat plate for fixing the telescopic end of the servo electric cylinder, and further comprises a coaxial positioning mechanism arranged at the middle section position of a pressing barrel. The inclined power-off device is electrically connected to a circuit of the servo electric cylinder; the inclination sensing mechanism is arranged at the lower end of the pressing cylinder. Through the inclination induction mechanism, before the pressing cylinder makes contact with the axle, the angle of the axle can be detected in advance, and when the axle inclines to a certain degree and is not coaxial with the axle hole of the steering knuckle, a power circuit of the servo electric cylinder is rapidly disconnected through the inclination power-off mechanism; therefore, the servo electric cylinder is immediately powered off and stops running, the pressing cylinder is stopped from being driven to move downwards, pressure is stopped from being applied to the inclined wheel shaft, the inclined wheel shaft is prevented from being deformed after being pressed, defective products can be well avoided, and the defective rate is reduced.

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 servo press machine for parts, comprising a servo electric cylinder and a flat plate to which its telescopic end is fixed, and a pressing cylinder is fixed on the lower side of the flat plate, and also comprising: a coaxial positioning mechanism arranged at the middle section of the pressing cylinder; a tilting power-off device electrically connected to the servo electric cylinder circuit; a tilting sensing mechanism arranged at the lower end of the pressing cylinder; the tilting sensing mechanism comprises a plurality of fan-shaped 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, and a push plate is fixed on the outer side of each of the fan-shaped pressing plates; the tilting power-off device comprises a shell, a plurality of slides are movably arranged on the inner side of the shell, and both sides of each slide are respectively connected to a connecting piece 1 and a connecting piece 2, and the connecting piece 1 and the connecting piece 2 located on the same slide are electrically connected through a wire, and an electromagnet is installed at the inner side of the shell at a position below each slide, and a positive conductive strip and a negative conductive strip are respectively installed at both ends of the inner side of the shell.

[0007] Preferably, a small hole is opened at the lower end of the pressing cylinder corresponding to the position of each fan-shaped pressure plate, a large hole is arranged at the upper end of each of the small holes, two suspension rods extending to the inside of the small hole are fixed on the upper side of each of the fan-shaped pressure plates, and a limiting ring is fixed on the outer side of each of the suspension rods which is slidably adapted to the inner side of the large hole at the corresponding position.

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

[0009] Preferably, an insertion rod is fixed at the position of each slide cylinder on the inner side of the shell, and the multiple slide cylinders are slidably mounted on the outer sides of the multiple insertion rods, and each slide cylinder is made of insulating material, and an armature is fixed at the lower end of each slide cylinder.

[0010] Preferably, one end of each slide cylinder is elastically connected to the inner side of the shell through a spring.

[0011] Preferably, the coaxial positioning mechanism includes an annular shell fixed on the outside of the pressing cylinder, a plurality of sliding rods slidably inserted on the outside of the pressing cylinder and located on the inside of the annular shell, the inner side of the annular shell is rotatably connected with a rotating ring, and the rotating ring is rotatably connected to one end of the plurality of sliding rods through a plurality of connecting rods, a positioning rod is fixed to the other end of each of the sliding rods, and rollers are rotatably connected at both ends of each of the positioning rods, and 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 comprises a motor mounted on the outside of the annular shell and an inner gear ring fixed to the inner edge of the rotating ring, and a driving gear meshing with the inner gear ring is fixed to the driving end of the motor.

[0013] Preferably, each of the positioning rods is arranged at a vertical angle.

[0014] Preferably, the servo electric cylinder is mounted on an upper plate, a lower plate is fixed to the lower side of the upper plate via four columns, and a plurality of guide rods penetrating and slidably connected to the interior of the upper plate are fixed to the upper side of the flat plate.

[0015] Preferably, a positioning seat is fixed on the upper side of the lower plate at a position below the pressing cylinder, and 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 component servo press machine through improvement, which has the following improvements and advantages compared with the prior art:

[0017] Firstly, the present invention uses a tilt sensing mechanism. As the pressing cylinder moves downward, the angle of the wheel axle can be detected in advance before the pressing cylinder contacts the wheel axle. When the wheel axle is coaxial with the steering knuckle shaft hole, the servo electric cylinder can drive the pressing cylinder to continue to move downward to press the wheel axle. When the wheel axle is tilted to a certain extent and is not coaxial with the steering knuckle shaft hole, the power supply line of the servo electric cylinder is quickly disconnected through the tilt power-off mechanism, so that the servo electric cylinder is immediately powered off and stops running, thereby stopping driving the pressing cylinder to move downward, and stopping applying pressure to the tilted wheel axle, thereby preventing the tilted wheel axle from being deformed after being subjected to pressure, thereby effectively avoiding the production of defective products and reducing the defective product rate.

[0018] Secondly, the present invention uses a coaxial positioning mechanism to position the wheel axle in advance before the pressing cylinder applies pressure to the wheel axle, so that the wheel axle maintains a vertical angle, thereby coinciding with the axial center line of the wheel axle and the shaft hole of the steering knuckle, thereby ensuring the coaxiality of the wheel axle and the shaft hole of the steering knuckle, preventing the wheel axle from tilting, not only facilitating the wheel axle to be pressed more smoothly into the inner side of the steering knuckle shaft hole, but also effectively avoiding uneven force caused by tilted placement of the wheel axle, thereby causing scratches and deformation on the end face of the wheel axle and the inner wall of the steering knuckle shaft hole, thereby further reducing the defective rate of steering knuckle production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0021] Figure 2 It is a schematic diagram of the structure of the second viewing angle of the present invention;

[0022] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 4 It is a partial cross-sectional structural schematic diagram of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 6 It is a structural schematic diagram of the tilt power-off mechanism in the present invention;

[0026] Figure 7 It is a structural schematic diagram of a state where multiple slides move simultaneously in the present invention;

[0027] Figure 8 It is a schematic diagram of the mechanism structure of any slide moving state in the present invention;

[0028] Fig. 9 It is a structural schematic diagram of the axle in the tilted placement state in the present invention;

[0029] Fig.10 It is a schematic diagram of the structure of the steering knuckle and the wheel axle in the present invention.

[0030] Reference numerals:

[0031] 1. Servo cylinder; 2. Plate; 3. Pressing cylinder; 4. Shell; 5. Positive conductive strip; 6. Negative conductive strip; 7. Slide cylinder; 8. Connecting plate 1; 9. Connecting plate 2; 10. Electromagnet; 11. Spring; 12. Inserting rod; 13. Upper plate; 14. Column; 15. Lower plate; 16. Guide rod; 17. Positioning seat; 18. Positioning pin; 19. Wire; 20. Armature; 101. Fan-shaped pressing plate; 102. Pushing plate; 103. Switch; 104. Small hole; 105. Large hole; 106. Hanging rod; 107. Limiting ring; 201. Annular shell; 202. Rotating ring; 203. Sliding rod; 204. Connecting rod; 205. Positioning rod; 206. Roller; 207. Motor; 208. Inner gear ring; 209. Driving gear. DETAILED DESCRIPTION

[0032] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides a four-column type parts servo press machine through improvement. The technical solution of the present invention is:

[0034] like Figures 1 to 10 As shown, the embodiment of the present invention provides a four-column servo press machine for parts, including a servo electric cylinder 1 and a flat plate 2 to which its telescopic end is fixed, and a pressing cylinder 3 is fixed on 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, and a plurality of guide rods 16 that penetrate and slide and are connected to the interior of the upper plate 13 are fixed on the upper side of the flat plate 2, and also include: a coaxial positioning mechanism arranged at the middle section of the pressing cylinder 3; a tilt power-off device electrically connected to the circuit of the servo electric cylinder 1; a tilt sensing mechanism arranged at the lower end of the pressing cylinder 3; the tilt sensing mechanism includes 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 outer side of the pressing cylinder 3, and a push plate 102 is fixed on the outer side of each fan-shaped pressing plate 101; the tilt power-off device includes a shell 4, and a plurality of slide cylinders 7 (such as Figure 6 As shown), and each slide 7 is respectively connected to a connecting piece 1 8 and a connecting piece 2 9 on both sides, the connecting piece 1 8 and the connecting piece 2 9 on the same slide 7 are electrically connected through a wire 19, and an electromagnet 10 is installed on the inner side of the shell 4 at a position below each slide 7, the number of switches 103 and the number of electromagnets 10 are the same, and the multiple switches 103 are respectively electrically connected to the control circuits of the multiple electromagnets 10, and the positive conductive strip 5 and the negative conductive strip 6 are respectively installed at both ends of the inner side of the shell 4.

[0035] Furthermore, two small holes 104 (such as Figure 5 As shown), 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;

[0036] The suspension rod 106 guides the movement of the sector-shaped pressure plate 101, so that the sector-shaped pressure plate 101 can keep moving vertically up and down, and the limit ring 107 can slide up and down inside the large hole 105. When multiple limit rings 107 are in contact with the bottom ends of the corresponding large holes 105, the multiple sector-shaped pressure plates 101 move down to the lowest point and make the multiple sector-shaped pressure plates 101 have the same height, so that it is convenient to simultaneously contact with the wheel shaft (such as Fig.10 as shown) lower end contact.

[0037] Furthermore, a plug rod 12 is fixed on the inner side of the housing 4 at a position corresponding to each slide cylinder 7, and multiple slide cylinders 7 are respectively slidably sleeved on the outer sides of multiple plug 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;

[0038] The slide 7 can be moved vertically up and down by the insertion rod 12, ensuring that the connecting piece 1 8 and the connecting piece 2 9 on both sides thereof can be stably separated or combined with the adjacent connecting piece 2 9 and the connecting piece 1 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 slide 7 to move downward.

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

[0040] When the slide 7 and the armature 20 move downward, the spring 11 is compressed. When the electromagnet 10 loses its electromagnetic attraction to the armature 20 due to power failure, the slide 7 and the armature 20 can be moved upward and reset under the action of the spring 11.

[0041] Furthermore, the coaxial positioning mechanism includes an annular shell 201 fixed on the outside of the pressing cylinder 3, a plurality of slide 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, and the rotating ring 202 is rotatably connected to one end of the plurality of slide rods 203 through a plurality of connecting rods 204, and a positioning rod 205 is fixed to the other end of each slide rod 203, and rollers 206 are rotatably connected to both ends of each positioning rod 205, and a driving mechanism for driving the rotating ring 202 to rotate is arranged between the rotating ring 202 and the annular shell 201, and the driving mechanism includes a motor 207 installed on the outside of the annular shell 201 and an inner gear ring 208 fixed to the inner edge of the rotating ring 202, and a driving gear 209 meshing with the inner gear ring 208 is fixed to the driving end of the motor 207.

[0042] By means of the coaxial positioning mechanism, the wheel axle can be positioned in advance before the pressing cylinder 3 applies pressure to the wheel axle, so that the wheel axle maintains a vertical angle, thereby coinciding with the axial center line of the wheel axle and the shaft hole of the steering knuckle, thereby ensuring the coaxiality of the wheel axle and the shaft hole of the steering knuckle, and preventing the wheel axle from tilting. This not only facilitates the wheel axle to be pressed into the inner side of the steering knuckle shaft hole more smoothly, but also effectively avoids uneven force caused by the tilted placement of the wheel axle, thereby causing scratches and deformation on the end face of the wheel axle and the inner wall of the steering knuckle shaft hole, thereby further reducing the defective rate of steering knuckle production.

[0043] Further, each positioning rod 205 is arranged at a vertical angle;

[0044] The positioning rod 205 is set at a vertical angle, so the line connecting the two rollers 206 at both ends thereof is a vertical angle. Therefore, under the positioning action of the multiple rollers 206, the wheel axle can maintain a vertical angle, so that the axis center lines of the wheel axle and the shaft hole of the steering knuckle coincide, thereby ensuring the coaxiality of the wheel axle and the shaft hole of the steering knuckle, preventing the wheel axle from tilting.

[0045] Furthermore, a positioning seat 17 is fixed on the upper side of the lower plate 15 at a position below the pressing 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 (such as Fig.10 shown);

[0046] A plurality of positioning pins 18 can be inserted into the inner sides of a plurality of screw holes on the steering knuckle, so as to position the steering knuckle and prevent the steering knuckle from being offset during press-fitting, so that the wheel axle can be smoothly pressed into the inner side of the steering knuckle shaft hole.

[0047] Working principle: When in use, place the steering knuckle body on the upper side of the positioning seat 17, and make multiple positioning pins 18 pass through multiple screw holes of the steering knuckle, then place the wheel axle that needs to be pressed into the inner side of the steering knuckle shaft hole at one end of the steering knuckle shaft hole, and 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, and the flat plate 2 drives the pressing cylinder 3 on its lower side to move downward, and 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 shaft hole of the steering knuckle;

[0048] In order to avoid the misalignment between the wheel axle and the steering knuckle shaft hole when the worker places the wheel axle, when the lower end of the pressing cylinder 3 approaches the surface of the wheel axle, the motor 207 that controls the coaxial positioning mechanism drives the driving gear 209 to rotate, and the driving gear 209 drives the inner gear ring 208 and the rotating ring 202 to rotate through the tooth meshing. When the rotating ring 202 rotates, the multiple sliding rods 203 are pushed to move synchronously to the inner side of the pressing cylinder 3 through the multiple connecting rods 204, and the multiple sliding rods 203 respectively drive the positioning rods 20 at one end to rotate. 5 are synchronously merged, so that the rollers 206 at both ends of each positioning rod 205 are attached to the outside of the wheel axle. Since each positioning rod 205 is set at a vertical angle, the connection line between the two rollers 206 located at both ends of the same positioning rod 205 is a vertical angle. Therefore, under the positioning effect of multiple rollers 206, the wheel axle can maintain a vertical angle, so that the axis center line of the wheel axle and the shaft hole of the steering knuckle coincide, thereby ensuring the coaxiality of the wheel axle and the shaft hole of the steering knuckle, preventing the wheel axle from tilting (such as Fig. 9 As shown); therefore, the positioning function of the multiple rollers 206 not only facilitates the axle to be pressed into the inner side of the steering knuckle shaft hole more smoothly, but also can well avoid uneven force due to the tilted placement of the axle, thereby causing scratches and deformation on the end face of the axle and the inner wall of the steering knuckle shaft hole, which can well reduce the defective rate of the steering knuckle production;

[0049] Since the multiple positioning rods 205 are connected to the outer side of the wheel axle in a rolling manner through the rollers 206 at both ends, when the multiple rollers 206 apply pressure to the outer side of the wheel axle for positioning, the pressing cylinder 3 can also be continuously moved downward to apply pressure to the wheel axle. Therefore, during the process of press-fitting the wheel axle, a uniform extrusion force is always applied to the side of the wheel axle, effectively preventing the uneven pressure distribution on the wheel axle from causing the wheel axle to tilt again, thereby further improving the stability of the wheel axle angle during the press-fitting process, and preventing the wheel axle from tilting when pressed and causing deformation between it and the steering knuckle shaft hole;

[0050] As the pressing cylinder 3 continues to move downward, before the lower end of the pressing cylinder 3 contacts the wheel axle, the multiple fan-shaped pressure plates 101 of the tilt sensing mechanism first contact the wheel axle. If the wheel axle is completely coaxial with the steering knuckle shaft hole, the multiple fan-shaped pressure plates 101 will contact the lower end of the wheel axle at the same time. At this time, the multiple fan-shaped pressure plates 101 will respectively drive the corresponding suspension rods 106 to move upward under the reaction force of the wheel axle. At the same time, the multiple fan-shaped pressure plates 101 move upward synchronously until their upper sides contact the lower end surface of the pressing cylinder 3. At the same time, the multiple fan-shaped pressure plates 101 simultaneously drive the outer push plates 102 to move upward. The multiple push plates 102 respectively trigger the switches 103 at the corresponding positions. The circuits of each switch 103 can be turned on at the same time, so that the multiple electromagnets 10 in the tilt power-off device are controlled by the control circuit to be energized at the same time and generate magnetic attraction to the multiple armatures 20. The multiple armatures 20 are affected by the magnetic attraction. Afterwards, the slide cylinders 7 at the corresponding positions are driven to move downward synchronously, and the multiple slide cylinders 7 drive the connecting pieces 1 8 and the connecting pieces 2 9 on both sides to move downward synchronously, so that every two adjacent slide cylinders 7 can be electrically connected through the connecting pieces 1 8 and the connecting pieces 2 9, and the two slide cylinders 7 at both ends are electrically connected to the positive conductive strip 5 and the negative conductive strip 6 through the connecting pieces 1 8 and the connecting pieces 2 9 on one side, respectively, so that the positive conductive strip 5 and the negative conductive strip 6 are kept in a conductive state, and the positive conductive strip 5 and the negative conductive strip 6 are connected in series with the power line of the servo electric cylinder 1, and the positive conductive strip 5 and the negative conductive strip 6 are kept in a conductive state, and the servo electric cylinder 1 can be continuously powered and operated, so that the telescopic end of the servo electric cylinder 1 continues to move downward to drive the pressing cylinder 3 to move downward, and the pressing cylinder 3 can press the wheel axle into the inner side of the steering knuckle shaft hole to complete the press-fitting operation;

[0051] If the wheel axle and the steering knuckle shaft hole are not aligned due to placement error, the wheel axle will tilt to a certain extent (such as Fig. 9 In the tilted state shown in the figure, at this time, the multiple fan-shaped pressure plates 101 of the tilt sensing mechanism will not contact the lower end of the wheel shaft at the same time. At this time, the fan-shaped pressure plate 101 with the highest lifting height close to the lower end of the wheel shaft will first contact the lower end of the wheel shaft, so that a switch 103 at the corresponding position will be energized first, thereby controlling an electromagnet 10 electrically connected thereto to be energized first to generate magnetic attraction (such as Figure 8As shown), the corresponding slide 7 is driven to move downward first, and the slide 7 drives the connecting pieces 1 8 and 2 9 on both sides thereof to move downward at the same time, so that the connecting pieces 1 8 and 2 9 on both sides of the slide 7 are separated from the adjacent connecting pieces 2 9 and 1 8 respectively, so that the circuit between the positive conductive strip 5 and the negative conductive strip 6 is disconnected, so that the power circuit of the servo electric cylinder 1 is disconnected. At this time, the servo electric cylinder 1 is immediately powered off and stops running, so as to stop driving the pressing cylinder 3 to move continuously downward, so as to stop applying pressure to the tilted wheel axle, so as to avoid the tilted wheel axle from being deformed after being subjected to pressure, so as to well avoid the production of defective products and reduce the defective rate.

[0052] The above 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 may 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 the embodiments shown herein, but will conform 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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