Automobile die hoisting clamp and control method

Abstract

The invention relates to an automobile mold hoisting clamp and a control method, the automobile mold hoisting clamp comprises a main beam, a clamping assembly and a detection assembly, the main beam is arranged along the X axis, and a first cavity is formed in the main beam; the clamping assembly comprises a cross beam, a rack, a telescopic beam and a clamp leg, and the cross beam reciprocates in the first cavity; the rack is connected with the cross beam, a second cavity is formed in the rack along the Y axis, and the telescopic beam reciprocates in the second cavity; the clamp leg is connected with the telescopic beam; a hook claw is arranged at the other end of the clamp leg; the detection assembly comprises a first feeler lever and a second feeler lever, the first feeler lever is arranged in the hook claw, and the first feeler lever is connected with a first limiting sensor; the second feeler lever is arranged on the inner side of the clamp leg and connected with a second limiting sensor. The product clamping stability can be guaranteed through the clamp legs and the hook claws; and the first feeler lever and the second feeler lever can detect whether the hook claw hooks in place or not, so that the accuracy and reliability of the hoisting clamp are improved. And meanwhile, the damage to the surface of the product caused by overlarge clamping force of the clamp can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive sheet metal manufacturing, and particularly to a lifting fixture and control method for automotive molds. Background Art

[0002] Automotive molds are mainly applied in the automotive manufacturing industry for producing automotive body parts. On the automotive production line, automotive sheet metal molds need to be frequently moved back and forth to facilitate different processes. To facilitate workshop operations, the handling and transfer of automotive molds are achieved by lifting. During the lifting process, the automotive mold needs to be grasped first, and then the position of the automotive mold is transferred by operating a crane.

[0003] In the prior art, slings or special grippers are used for lifting automotive molds during the lifting process. The stability of sling lifting is poor, and it is easy to slide during the lifting process, resulting in the inclination or deviation of the mold, with poor lifting accuracy and potential safety hazards; during the lifting process of the fixture, the automotive mold is clamped by the fixture and then lifted. Although the stability and accuracy are guaranteed to a certain extent, it is difficult to control the magnitude of the clamping force during the operation process. If the clamping force is too large, it is easy to cause the mold to be scrapped. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor lifting stability, poor accuracy, and easy scrapping of automotive molds in the prior art.

[0005] To solve the above technical problems, the present invention provides a lifting fixture for automotive molds, including: A main beam, the main beam is arranged along the X-axis, and a first cavity is arranged inside the main beam along the X-axis direction; A clamping assembly, the clamping assembly includes a cross beam, a frame, a telescopic beam, and clamping legs. A pair of the cross beams reciprocate in the first cavity; the frame is connected to the cross beam, and a second cavity is arranged inside the frame along the Y-axis direction. A pair of the telescopic beams reciprocate in the second cavity; the clamping legs are arranged along the Z-axis direction, one end of the clamping legs is connected to the telescopic beam, and a hook claw is arranged at the other end of the clamping legs. A detection assembly, the detection assembly is arranged inside the clamping legs, and the detection assembly includes a first touch rod, a first ejector rod, a second touch rod, and a second ejector rod. The first touch rod is arranged inside the hook claw, the first ejector rod is hinged to the clamping leg, a first limit sensor is arranged at one end of the first ejector rod, and the other end of the first ejector rod is connected to the first touch rod; the second touch rod is arranged on the side of the clamping leg close to the telescopic beam, the second ejector rod is hinged to the clamping leg, one end of the second ejector rod is hinged to the second touch rod, and a second limit sensor is arranged at the other end of the second ejector rod.

[0006] In an embodiment of the present invention, a suspension beam is provided on the top of the main beam, and a pin - type weighing sensor is disposed through between the suspension beam and the main beam; pulleys are provided at the four top corners of the suspension beam, and an inclination sensor is provided at the center of the suspension beam.

[0007] In an embodiment of the present invention, the clamping assembly further includes a driving sprocket, a driven sprocket and a first driving source. The driving sprocket and the driven sprocket are disposed at both ends of the main beam, and are connected by a chain therebetween. The output end of the first driving source is connected to the driving sprocket, and a first traction device is provided between the cross beam and the chain.

[0008] In an embodiment of the present invention, the center of the frame is hinged to the cross beam, both ends of the frame are connected to the cross beam, and a balance spring is provided between the frame and the cross beam.

[0009] In an embodiment of the present invention, the clamping assembly further includes a second driving source, a first lead screw and a second lead screw. The first lead screw and the second lead screw are disposed on the frame along the Y - axis direction. A first gear is sleeved outside the first lead screw, and a second gear is sleeved outside the second lead screw. The output end of the second driving source is provided with a driving gear, and the driving gear meshes with the first gear and the second gear; second traction devices are sleeved on both the first lead screw and the second lead screw, and the second traction devices are connected to the telescopic beam.

[0010] In an embodiment of the present invention, a sensing scale is provided on one side of the second traction device, and a positioning sensor cooperating with the sensing scale is provided on the frame.

[0011] In an embodiment of the present invention, a first laser rangefinder is provided on the frame, the first laser rangefinder is disposed facing the second traction device, and a second laser rangefinder is provided between the two cross beams.

[0012] In an embodiment of the present invention, the detection assembly further includes a first elastic element and a second elastic element. The first elastic element and the second elastic element are both provided on the clamping leg, the first elastic element is connected to the first contact rod, and the second elastic element is connected to the second contact rod.

[0013] In an embodiment of the present invention, the detection assembly further includes a third contact rod, a third elastic element and a third ejector rod. The third contact rod is provided on the side of the clamping leg away from the telescopic beam. Both ends of the third ejector rod are hinged to the clamping leg and the third contact rod respectively, and a third limit sensor is provided at the top of the third contact rod; one end of the third elastic element is connected to the clamping leg, and the other end of the third elastic element is connected to the top of the third contact rod.

[0014] A control method for a hoisting fixture of an automobile mold, which is used to control the hoisting fixture of the automobile mold. The specific control method is as follows: S1: The crane drives the hoisting fixture to move to the top of the product; S2: The cross beam moves along the first cavity so that the distance between the clamping legs on both sides of the main beam is equal to the distance of the lifting points of the product to be clamped in the X-axis direction; at the same time, the telescopic beam moves in the second cavity so that the distance between the clamping legs on both sides of the frame is greater than the distance of the lifting points of the product to be clamped in the Y-axis direction; S3: The crane drives the hoisting fixture to descend close to the product to be clamped, and the telescopic beam contracts in the second cavity so that the clamping legs on both sides are attached to the product to be clamped. When the second touch rod is attached to the product to be clamped, the second touch rod acts to drive the second ejector rod to rotate, so that the second ejector rod abuts against the second limit sensor; after receiving the feedback signal from the second limit sensor, the contraction beam stops acting; S4: The crane acts to drive the hoisting fixture to lift. When the hook claw is attached to the lifting point of the product to be clamped, the first touch rod acts to drive the first ejector rod to rotate, so that the first ejector rod abuts against the first limit sensor. After receiving the feedback signal from the first limit sensor, the hoisting fixture clamps the product to be clamped.

[0015] The above technical solution of the present invention has the following advantages compared with the prior art: For the hoisting fixture and control method of an automobile mold of the present invention, the product can be hooked by the hook claw at the bottom of the clamping leg, improving the stability of the product during hoisting; secondly, the detection by the first touch rod inside the hook claw can detect whether the hook claw is hooked in place, further improving the accuracy and reliability of the hoisting fixture on the premise of the stable hoisting of the product by the hoisting fixture. By the actions of the cross beam and the telescopic beam, multiple clamping legs are controlled to clamp the product, and the second touch rod inside the clamping leg detects whether the clamping legs are clamped in place, which can prevent damage to the surface of the product caused by excessive clamping force of the fixture and avoid scrapping the product due to clamping. Brief Description of the Drawings

[0016] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to specific embodiments of the present invention and in conjunction with the accompanying drawings, where Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is Figure 1 the structural schematic diagram of the clamping assembly in Figure 3 is Figure 1 the internal structural schematic diagram of the main beam in Figure 4 is Figure 2 the partial structural schematic diagram of the A position in Figure 5 is Figure 2Partial structural schematic diagram at B in [the figure]; Figure 6 is Figure 2 Internal structural schematic diagram of the tong legs in [the figure]; Figure 7 is Figure 2 Structural schematic diagram of the frame in [the figure]; Figure 8 is Figure 2 Structural schematic diagram of the telescopic beam and the tong legs in [the figure]; Figure 9 is Figure 2 Structural schematic diagram of the bottom of the cross beam in [the figure]; Explanation of the reference numerals in the drawings of the specification: 1, main beam; 2, clamping assembly; 3, detection assembly; 4, suspension beam; 5, pin type load cell; 6, pulley; 7, inclination sensor; 8, control cabinet; 11, first cavity; 21, cross beam; 22, telescopic beam; 23, tong legs; 24, frame; 25, balance spring; 26, second cavity; 31, first contact rod; 32, first ejector rod; 33, first limit sensor; 34, second contact rod; 35, second ejector rod; 36, second limit sensor; 37, third contact rod; 38, third ejector rod; 39, third limit sensor; 211, driving sprocket; 212, driven sprocket; 213, first driving source; 214, chain; 215, first tractor; 216, second laser rangefinder; 217, second encoder; 221, induction scale; 222, positioning sensor; 231, claw; 241, second driving source; 242, first lead screw; 243, second lead screw; 244, driving gear; 245, first gear; 246, second gear; 247, second tractor; 248, first laser rangefinder; 249, first encoder; 311, first elastic element; 341, second elastic element; 371, third elastic element. Detailed implementation manners

[0017] The present invention will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the exemplified embodiments are not intended to limit the present invention. Embodiment 1

[0018] Referring to Figure 1 - Figure 6 as shown, the present invention discloses a hoisting fixture for an automobile mold, including: A main beam 1, the main beam 1 is arranged along the X axis, and a first cavity 11 is arranged inside the main beam 1 along the X axis direction; The clamping assembly 2, the clamping assembly 2 includes a cross beam 21, a frame 24, a telescopic beam 22 and clamping legs 23, and a pair of the cross beams 21 reciprocate in the first cavity 11; the frame 24 is connected to the cross beam 21, a second cavity 26 is arranged inside the frame 24 along the Y-axis direction, and a pair of the telescopic beams 22 reciprocate in the second cavity 26; the clamping legs 23 are arranged along the Z-axis direction, one end of the clamping leg 23 is connected to the telescopic beam 22, and a hook 231 is arranged at the other end of the clamping leg 23; The detection assembly 3, the detection assembly 3 is arranged inside the clamping leg 23, the detection assembly 3 includes a first contact rod 31, a first ejector rod 32, a second contact rod 34 and a second ejector rod 35, the first contact rod 31 is arranged inside the hook 231, the first ejector rod 32 is hinged to the clamping leg 23, a first limit sensor 33 is arranged at one end of the first ejector rod 32, and the other end of the first ejector rod 32 is connected to the first contact rod 31; the second contact rod 34 is arranged on one side of the clamping leg 23 close to the telescopic beam 22, the second ejector rod 35 is hinged to the clamping leg 23, one end of the second ejector rod 35 is hinged to the second contact rod 34, and a second limit sensor 36 is arranged at the other end of the second ejector rod 35.

[0019] In the present invention, the top of the main beam 1 is used to be connected to a crane to hoist the entire fixture, so as to realize the movement of the entire fixture in the Y-axis direction; the clamping assembly 2 in the present invention includes two parts, wherein two groups of cross beams 21 are arranged in the first cavity 11 of the main beam 1, and the two groups of cross beams 21 move relatively or away from each other in the first cavity 11 along the X-axis direction; a frame 24 for installing the clamping legs 23 is arranged at the end of each group of cross beams 21, the frame 24 is arranged along the Y-axis direction, two telescopic beams 22 are arranged in the second cavity 26 of each frame 24, the bottom of each telescopic beam 22 is provided with a clamping leg 23, and the movement of the telescopic beam 22 drives a pair of clamping legs 23 to move relatively or away from each other in the Y-axis direction. There are at least four groups of clamping legs 23 in total in the clamping assembly 2 of the present invention, and a pair are arranged on both sides of the two cross beams 21 respectively. The movement of the cross beam 21 drives the clamping legs 23 on both sides to adjust the distance in the X-axis direction, and the movement of the telescopic beam 22 drives the adjustment of the distance between the two clamping legs 23 on the same side in the Y-axis direction, and the four clamping legs 23 clamp the product in the X-axis and Y-axis directions; secondly, a hook 231 is arranged at the bottom of the clamping leg 23 in the present invention. Specifically, the hooks 231 on both sides of each frame 24 are arranged oppositely for fixing the product in the Z-axis direction, which can effectively ensure the stability of the clamped product.

[0020] In the present invention, the clamping leg 23 is of a plate-like structure. Each clamping leg 23 includes at least two side plates, and a detection component 3 is installed between the two side plates. Among them, the first contact rod 31 is arranged at the hook 231. When clamping a product, after the hook 231 cooperates with the product, the product will abut against the first contact rod 31. The first contact rod 31 drives the first ejector rod 32 to rotate, and the first ejector rod 32 rotates and abuts against the first limit sensor 33. Signal feedback determines that the hook 231 hooks the product to ensure that the product is hooked. The second contact rod 34 is arranged inside the clamping leg 23. When the clamping leg 23 fits with the product, the product presses the second contact rod 34, and the second contact rod 34 acts to drive the second ejector rod 35 to rotate. The second ejector rod 35 abuts against the second limit sensor 36, and signal feedback indicates that the clamping leg 23 fits with the product in place, and the clamping leg 23 stops acting. While ensuring accurate clamping of the product, it avoids the clamping leg 23 continuing to act and damaging the surface of the product due to excessive clamping force.

[0021] Further, a suspension beam 4 is arranged at the top of the main beam 1, and a pin-type load cell 5 is arranged between the suspension beam 4 and the main beam 1; pulleys 6 are arranged at the four top corners of the suspension beam 4, and an inclination sensor 7 is arranged at the center of the suspension beam 4.

[0022] The suspension beam 4 is arranged at the top of the main beam 1 and is used to connect the crane. Specifically, pulleys 6 are arranged at the four top corners of the top of the suspension beam 4 and are used to cooperate with the steel wire ropes of the crane. The electric hoist on the crane winds the steel wire ropes to realize the adjustment of the height of the entire fixture. The suspension beam 4 and the main beam 1 are connected by a pin. As a preferred solution of the present invention, the pin-type load cell 5 can, while ensuring the stable connection between the suspension beam 4 and the main beam 1, judge the quality of the product clamped by the fixture, avoid the load of the clamped product exceeding the load of the crane, and ensure the safety of the hoisting. Secondly, the inclination sensor 7 is arranged at the center position of the suspension beam 4 and is used to detect the horizontality of the entire lifting appliance to ensure the stability of the product clamping.

[0023] Further, referring to Figure 2 As shown, the clamping component 2 further includes a driving sprocket 211, a driven sprocket 212, and a first driving source 213. The driving sprocket 211 and the driven sprocket 212 are arranged at both ends of the main beam 1. The driving sprocket 211 and the driven sprocket 212 are connected by a chain 214. The output end of the first driving source 213 is connected to the driving sprocket 211. A first tractor 215 is arranged between the cross beam 21 and the chain 214.

[0024] Specifically, the driving sprocket 211 and the driven sprocket 212 are connected by a chain 214. The first driving source 213 drives the driving sprocket 211 to rotate, and drives the driven sprocket 212 to rotate synchronously through the chain 214. Two groups of cross beams 21 are arranged inside the main beam 1, and the cross beam 21 is connected to the chain 214 through the first tractor 215. The whole chain 214 is in a ring shape, and two groups of first tractors 215 are arranged on both sides of the chain 214. When the first driving source 213 rotates forward or backward, it drives the first tractors 215 on both sides to move relative to each other or away from each other, thereby realizing the adjustment of the distance between the two groups of cross beams 21. As a preferred solution of the present invention, a tensioning mechanism is arranged on one side of the main beam 1 where the driven sprocket 212 is located for adjusting the tension of the chain 214.

[0025] Further, the center of the frame 24 is hinged to the cross beam 21, both ends of the frame 24 are connected to the cross beam 21, and a balance spring 25 is arranged between the frame 24 and the cross beam 21.

[0026] Specifically, two groups of balance springs 25 are arranged, and the two groups of balance springs 25 are symmetrically arranged. The stability of the whole fixture can be further improved through the balance springs 25.

[0027] Further, referring to Figure 7 As shown, the clamping assembly 2 further includes a second driving source 241, a first lead screw 242 and a second lead screw 243. The first lead screw 242 and the second lead screw 243 are arranged on the frame 24 along the Y-axis direction. A first gear 245 is sleeved outside the first lead screw 242, and a second gear 246 is sleeved outside the second lead screw 243. The output end of the second driving source 241 is provided with a driving gear 244, and the driving gear 244 meshes with the first gear 245 and the second gear 246; A second tractor 247 is sleeved on both the first lead screw 242 and the second lead screw 243, and the second tractor 247 is connected to the telescopic beam 22.

[0028] Specifically, the first lead screw 242 and the second lead screw 243 are arranged in parallel on the top of the frame 24. When the second driving source 241 rotates, it drives the driving gear 244 to rotate. The driving gear 244 rotates to drive the first gear 245 and the second gear 246 to rotate, and the rotation directions of the first gear 245 and the second gear 246 are opposite. At this time, the first lead screw 242 and the second lead screw 243 rotate in opposite directions, and the two groups of second tractors 247 move relative to each other or away from each other on the first lead screw 242 and the second lead screw 243, thereby realizing the actions of the two groups of telescopic beams 22 and adjusting the distance between the clamping legs 23 on both sides.

[0029] Further, referring to Figure 8As shown, a sensing ruler 221 is provided on one side of the second tractor 247, and a positioning sensor 222 cooperating with the sensing ruler 221 is provided on the frame 24.

[0030] Specifically, during the operation of the two telescopic beams 22, the actual distance between the two clamping legs 23 is fed back through the cooperation of the sensing ruler 221 and the positioning sensor 222. At the same time, the displacement of the telescopic beam 22 can also be restricted by the sensing ruler 221.

[0031] Further, referring to Figure 9 As shown, a first laser rangefinder 248 is provided on the frame 24, the first laser rangefinder 248 is disposed opposite to the second tractor 247, and a second laser rangefinder 216 is provided between the two cross beams 21.

[0032] Specifically, during the actual operation process, the second tractor 247 reciprocates on the frame 24. The distance between the two clamping legs 23 in the Y-axis direction is measured by the first laser rangefinder 248. When clamping the same product again, the second drive source 241 can be controlled to rotate the same number of turns, reducing the adjustment time of the fixture and improving the lifting efficiency. Similarly, the second laser rangefinder 216 provided at the bottom of the cross beam 21 can feedback the distance between the two groups of clamping legs 23 in the X-axis direction. In addition, through the data fed back by the first laser rangefinder 248 and the second laser rangefinder 216, the data when clamping the same product again can also be compared to improve the accuracy and reliability of clamping the product. As a preferred solution of the present invention, a first encoder 249 is further provided on the frame 24. The first encoder 249 is used to detect the number of turns of the first drive source 213, thereby calibrating the accuracy of the first laser rangefinder 248. Similarly, a second encoder 217 is provided at the bottom of the cross beam 21 to measure the moving distance of the cross beam 21 and calibrate the data detected by the second laser rangefinder 216, further improving the accuracy of the lifting fixture.

[0033] Further, referring to Figure 6 As shown, the detection assembly 3 further includes a first elastic element 311 and a second elastic element 341. The first elastic element 311 and the second elastic element 341 are both provided on the clamping leg 23. The first elastic element 311 is connected to the first contact rod 31, and the second elastic element 341 is connected to the second contact rod 34.

[0034] Specifically, by using the tension of the first elastic element 311 and the second elastic element 341, the reset of the first contact rod 31 and the second contact rod 34 can be realized respectively. During the actual operation process, when the fixture leaves the product, the first elastic element 311 drives the first ejector rod 32 to rotate away, so that the first ejector rod 32 moves away from the first limit sensor 33. Similarly, the second elastic element 341 drives the second ejector rod 35 to rotate, so that the second ejector rod 35 leaves the second limit sensor 36.

[0035] Furthermore, the detection assembly 3 further includes a third contact rod 37, a third elastic element 371 and a third ejector rod 38. The third contact rod 37 is arranged on the side of the clamp leg 23 away from the telescopic beam 22. The two ends of the third ejector rod 38 are respectively hinged to the clamp leg 23 and the third contact rod 37. A third limit sensor 39 is arranged at the top of the third contact rod 37. One end of the third elastic element 371 is connected to the clamp leg 23, and the other end of the third elastic element 371 is connected to the top of the third contact rod 37.

[0036] Specifically, the position of the third contact rod 37 is arranged outside the clamp leg 23. During the operation, if an obstacle is encountered on the outside of the clamp leg 23, the third contact rod 37 acts, driving the third ejector rod 38 to contact the third limit sensor 39. The third limit sensor 39 feeds back a signal to timely adjust the position of the fixture, avoiding the extrusion of the product caused by the collision of the entire fixture and damaging the surface of the mold. Embodiment 2

[0037] A control method for an automotive mold hoisting fixture is used to control the automotive mold hoisting fixture described in Embodiment 1. The specific control method is as follows: S1: The crane drives the hoisting fixture to move to the top of the product; S2: The cross beam 21 moves along the first cavity 11, so that the distance between the clamp legs 23 on both sides of the main beam 1 in the X-axis direction of the suspension point of the product to be clamped is equal; at the same time, the telescopic beam 22 moves in the second cavity 26, so that the distance between the clamp legs 23 on both sides of the frame 24 is greater than the distance in the Y-axis direction of the suspension point of the product to be clamped; S3: The crane drives the hoisting fixture to descend and approach the product to be clamped. The telescopic beam 22 contracts in the second cavity 26, so that the clamp legs 23 on both sides fit with the product to be clamped. When the second contact rod 34 fits with the product to be clamped, the second contact rod 34 acts to drive the second ejector rod 35 to rotate, so that the second ejector rod 35 abuts against the second limit sensor 36; after receiving the feedback signal from the second limit sensor 36, the contraction beam stops acting; S4: The crane operates to drive the lifting of the lifting fixture. After the hook claw 231 fits with the lifting point of the product to be clamped, the first contact rod 31 operates to drive the rotation of the first ejector rod 32, so that the first ejector rod 32 abuts against the first limit sensor 33. After receiving the feedback signal from the first limit sensor 33, the lifting fixture clamps the product to be clamped.

[0038] On the top of the main beam 1 in the present invention, a control cabinet 8 is further provided for controlling the operation of the entire lifting fixture. Specifically, in step S1, the entire lifting fixture is conveyed to the top of the product to be clamped by the crane.

[0039] In step S2, according to the position of the product lifting point, the distance between the two side beams 21 is adjusted, which can be adjusted according to the data fed back by the second laser rangefinder 216, so that the distance between the two sets of clamping legs 23 in the X-axis direction corresponds to the position of the product lifting point to be clamped; at the same time, the distance between the telescopic beams 22 is adjusted so that the distance between the two clamping claws in the Y-axis direction is greater than the width of the product to be clamped.

[0040] In step S3, the telescopic beam 22 drives the clamping legs 23 to fit with both sides of the product to be clamped. After the product to be clamped contacts the second contact rod 34 inside the clamping legs 23, the second contact rod 34 drives the rotation of the second ejector rod 35. When the control cabinet 8 receives the signal from the second limit sensor 36, it proves that the clamping legs 23 fit with the side wall of the product, and the telescopic beam 22 stops operating, avoiding excessive clamping force on the product to be clamped and damaging the surface of the product; In step S4, the crane operates to drive the entire lifting fixture to move along the Z-axis direction, raising the position of the hook claw 231 so that the hook claw 231 contacts the product to be clamped. When the first contact rod 31 inside the hook claw 231 contacts the lifting point of the product to be clamped, the first ejector rod 32 contacts the first limit sensor 33. After the control cabinet 8 receives the signal from the first limit sensor 33, it proves that the hook claw 231 is hooked in place, and then the crane continues with the lifting.

[0041] The present invention discloses an automobile mold lifting fixture and a control method. The product can be hooked by the hook claw 231 at the bottom of the clamping leg 23, improving the stability of the product during the lifting process; secondly, the detection by the first contact rod 31 inside the hook claw 231 can detect whether the hook claw 231 is hooked in place, further improving the accuracy and reliability of the lifting fixture on the premise of stably lifting the product by the lifting fixture. By the actions of the cross beam 21 and the telescopic movement, multiple clamping legs 23 are controlled to clamp the product. The second contact rod 34 inside the clamping legs 23 detects whether the clamping legs 23 are clamped in place, which can prevent damage to the product surface caused by excessive clamping force of the fixture and avoid scrapping the product due to clamping.

[0042] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. An automotive mold lifting fixture, characterized in that, Comprising: A main beam, the main beam is arranged along the X-axis, and a first cavity is arranged inside the main beam along the X-axis direction; A clamping assembly, the clamping assembly includes a cross beam, a frame, a telescopic beam and clamping legs. A pair of the cross beams reciprocate in the first cavity; the frame is connected to the cross beam, and a second cavity is arranged inside the frame along the Y-axis direction. A pair of the telescopic beams reciprocate in the second cavity; the clamping legs are arranged along the Z-axis direction, one end of the clamping legs is connected to the telescopic beam, and a hook is arranged at the other end of the clamping legs; A detection assembly, the detection assembly is arranged inside the clamping legs, the detection assembly includes a first touch rod, a first ejector rod, a second touch rod and a second ejector rod. The first touch rod is arranged inside the hook, the first ejector rod is hinged to the clamping leg, a first limit sensor is arranged at one end of the first ejector rod, and the other end of the first ejector rod is connected to the first touch rod; the second touch rod is arranged on one side of the clamping leg close to the telescopic beam, the second ejector rod is hinged to the clamping leg, one end of the second ejector rod is hinged to the second touch rod, and a second limit sensor is arranged at the other end of the second ejector rod.

2. The hoisting fixture for automotive molds according to claim 1, wherein: A suspension beam is arranged on the top of the main beam, and a pin-type load cell is arranged between the suspension beam and the main beam; pulleys are arranged at the four top corners of the suspension beam, and an inclination sensor is arranged at the center of the suspension beam.

3. The lifting fixture for automotive molds according to claim 1, characterized in that: The clamping assembly further includes a driving sprocket, a driven sprocket and a first driving source. The driving sprocket and the driven sprocket are arranged at both ends of the main beam, and are connected by a chain between the driving sprocket and the driven sprocket. The output end of the first driving source is connected to the driving sprocket, and a first tractor is arranged between the cross beam and the chain.

4. The automotive mold hoisting fixture according to claim 1, characterized in that: The center of the frame is hinged to the cross beam, both ends of the frame are connected to the cross beam, and a balance spring is arranged between the frame and the cross beam.

5. The hoisting fixture for automotive molds according to claim 1, characterized in that: The clamping assembly further includes a second driving source, a first lead screw and a second lead screw. The first lead screw and the second lead screw are arranged on the frame along the Y-axis direction. A first gear is sleeved outside the first lead screw, and a second gear is sleeved outside the second lead screw. The output end of the second driving source is provided with a driving gear, and the driving gear meshes with the first gear and the second gear; second tractors are sleeved on both the first lead screw and the second lead screw, and the second tractors are connected to the telescopic beam.

6. The automotive mold lifting fixture according to claim 5, wherein: An induction ruler is arranged on one side of the second tractor, and a positioning sensor matched with the induction ruler is arranged on the frame.

7. The automotive mold hoisting fixture according to claim 5, wherein: A first laser sensor is arranged on the frame, the first laser sensor is arranged facing the second tractor, and a second laser rangefinder is arranged between the two groups of cross beams.

8. The automotive mold lifting fixture according to claim 1, wherein: The detection assembly further includes a first elastic element and a second elastic element. The first elastic element and the second elastic element are both arranged on the clamping leg. The first elastic element is connected to the first touch rod, and the second elastic element is connected to the second touch rod.

9. The automotive mold lifting fixture according to claim 1, wherein: The detection component further includes a third touch rod, a third elastic element, and a third ejector rod. The third touch rod is disposed on a side of the clamping leg away from the telescopic beam. Two ends of the third ejector rod are respectively hinged to the clamping leg and the third touch rod. A third limit sensor is disposed at the top of the third touch rod. One end of the third elastic element is connected to the clamping leg, and the other end of the third elastic element is connected to the top of the third touch rod.

10. A control method for an automotive die hoisting fixture, which is used to control the automotive die hoisting fixture according to any one of claims 1-9, characterized in that, The specific control method is as follows: S1: The crane drives the lifting fixture to move to the top of the product. S2: The cross beam moves along the first cavity to make the distance between the clamping legs on both sides of the main beam equal to the distance of the lifting point of the product to be clamped in the X-axis direction. At the same time, the telescopic beam moves in the second cavity to make the distance between the clamping legs on both sides of the frame greater than the distance of the lifting point of the product to be clamped in the Y-axis direction. S3: The crane drives the lifting fixture to descend and approach the product to be clamped. The telescopic beam contracts in the second cavity to make the clamping legs on both sides fit with the product to be clamped. When the second touch rod fits with the product to be clamped, the second touch rod acts to drive the second ejector rod to rotate, so that the second ejector rod abuts against the second limit sensor. After receiving the feedback signal from the second limit sensor, the retractable beam stops acting. S4: The crane acts to drive the lifting fixture to lift. When the hook claw fits with the lifting point of the product to be clamped, the first touch rod acts to drive the first ejector rod to rotate, so that the first ejector rod abuts against the first limit sensor. After receiving the feedback signal from the first limit sensor, the lifting fixture clamps the product to be clamped.

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