A machine tool positioning workbench with an automatic leveling function

Abstract

This application relates to the technical field of machine tool processing, and specifically discloses a machine tool positioning workbench with an automatic leveling function, which includes a mounting base, a left jaw and a right jaw slidably connected to the top surface of the mounting base, and a placement table; both ends of the placement table are connected to the top surface of the mounting base; a frustum is connected to the top surface of the placement table, and three sliding plates are inclined and slidably arranged in the placement table, and the three sliding plates are evenly distributed around the circumference of the frustum. A sliding groove for the sliding plate to slide is arranged on the circumferential surface of the frustum; a sector plate is detachably connected to the top end of the sliding plate, and the cavity of the workpiece is sleeved outside the frustum and the sector plate; an installation cavity is arranged in the mounting base, and a first driving mechanism for driving the sliding plate to reciprocate along the sliding groove is arranged in the installation cavity, and a second driving mechanism for driving the left jaw and the right jaw to open and close is arranged in the installation cavity. This application has the effect of reducing errors generated during workpiece processing.

Description

Technical Field

[0001] The present invention relates to the technical field of machine tool processing, and particularly to a machine tool positioning workbench with an automatic leveling function. Background Art

[0002] In the machining of workpieces on a machine tool, jaws for clamping the workpiece are provided on the workbench of the machine tool. The most common workpiece clamping method is to clamp the workpiece by two left and right jaws driven by hydraulic pressure provided on the top surface of the workbench or three jaws driven by hydraulic pressure arranged around the workpiece.

[0003] In the related art, during the machining of a workpiece by a hydraulic cylinder, the hydraulic jaws at the end of a manipulator extend into the cavity of the workpiece, the hydraulic jaws open to clamp the workpiece, and then the workpiece is placed on the top surface of the workbench and located between the left and right jaws. When the workpiece is placed on the top surface of the workbench, at this time, the axis of the workpiece and the axis of the output shaft that drives the tool of the machine tool to rotate are both perpendicular to the top surface of the workbench. The hydraulic system drives the left and right jaws to clamp the workpiece. However, during the process of the left and right jaws clamping the workpiece, when different jaws contact the workpiece from the horizontal direction, there are inevitably often differences in sequence, so the forces on different sides of the part are also in sequence, resulting in the position of the workpiece being prone to slight inclination, and the axis of the workpiece not being perpendicular to the top surface of the workbench. At this time, the workpiece is clamped by the left and right jaws. There is a deviation between the axis of the workpiece and the axis of the output shaft, resulting in errors in the machined workpiece and unqualified workpiece quality. Summary of the Invention

[0004] In order to reduce the errors generated during workpiece machining, the present application provides a machine tool positioning workbench with an automatic leveling function.

[0005] The machine tool positioning workbench with an automatic leveling function provided by the present application adopts the following technical solutions:

[0006] A machine tool positioning workbench with an automatic leveling function, comprising a mounting base, a left jaw and a right jaw slidably connected to the top surface of the mounting base, and a placement table; the placement table is U-shaped, and both ends of the placement table are connected to the top surface of the mounting base, and the placement table is used for placing workpieces; a frustum is connected to the top surface of the placement table, and three sliding plates are inclined and slidably arranged in the placement table, and the three sliding plates are evenly distributed around the circumference of the frustum, and a sliding groove for the sliding plates to slide is arranged on the circumferential surface of the frustum; the bottom end of the sliding plate extends out of the bottom surface of the placement table, and the top end of the sliding plate extends out of the top surface of the placement table; a sector plate is detachably connected to the top end of the sliding plate, and the cavity of the workpiece is sleeved outside the frustum and the sector plate; an installation cavity is arranged in the mounting base, and a first driving mechanism for driving the sliding plate to reciprocate along the sliding groove is arranged in the installation cavity, and a second driving mechanism for driving the left jaw and the right jaw to open and close is arranged in the installation cavity.

[0007] Optionally, the first driving mechanism includes a cylinder body, a first piston rod, a first piston head and a push-pull disc; the cylinder body is installed in the installation cavity, the axis of the cylinder body is collinear with the axis of the frustum, the first piston head slides on the inner wall of the cylinder body, the end of the first piston rod is connected to the top surface of the first piston head, and the top end of the first piston rod extends out of the top of the cylinder body and out of the top surface of the mounting base; the push-pull disc is coaxially connected to the top end of the first piston rod, one end of a limiting block is connected to the bottom end of the sliding plate, the top surface of the other end of the limiting block is attached to the bottom surface of the push-pull disc, a notch for the push-pull disc to extend into is arranged at the bottom end of the sliding plate, and the top surface of the push-pull disc is attached to the top surface of the notch; a first oil pipe is inserted and communicated with the circumferential surface of the top of the cylinder body, and a second oil pipe is inserted and communicated with the circumferential surface of the bottom of the cylinder body.

[0008] Optionally, two guiding plates symmetrically arranged with respect to the frustum are installed on the top surface of the mounting base, trapezoidal sliders are connected to the bottom surfaces of the left jaw and the right jaw respectively, and trapezoidal grooves for the two trapezoidal sliders to slide are arranged on the top surfaces of the two guiding plates respectively, and the trapezoidal grooves penetrate through both ends of the guiding plates; the second driving mechanism is used for driving the trapezoidal sliders to slide in the trapezoidal grooves.

[0009] Optionally, the second driving mechanism includes a push-pull plate, a rotating shaft, a rotating arm, and a driving component; there are two push-pull plates, and the two push-pull plates are respectively connected to the bottom surfaces of the mutually adjacent ends of the two trapezoidal sliders. The bottom end of the push-pull plate extends into the installation cavity, and the bottom surface of the trapezoidal groove and the top surface of the installation seat are provided with moving grooves for the push-pull plate to slide; there are two rotating shafts, and the two rotating shafts are fixedly connected to the inner wall of the installation cavity, and the two rotating shafts are symmetrically arranged with respect to the axis of the frustum; there are two rotating arms, and the two rotating arms are respectively rotatably connected to the two rotating shafts; a first rotating opening for the bottom end of the push-pull plate to enter is provided at the top end of the rotating arm, first rotating pins are connected to both side surfaces of the bottom end of the push-pull plate, and a first waist-shaped hole for the first rotating pin to rotate is provided on the side surface of the top end of the rotating arm; the driving component is installed in the installation cavity, and the driving component is used to drive the bottom ends of the two rotating arms to approach each other synchronously or move away from each other synchronously.

[0010] Optionally, the driving component includes a sliding block, a pressing block, and a driving member; there are two sliding blocks, and the two sliding blocks slide on the bottom surface of the installation cavity, and the two sliding blocks are symmetrically arranged with respect to the axis of the frustum; the mutually adjacent side surfaces of the sliding blocks are in a slope shape, and the slope of the sliding block is inclined upward; the pressing block is arranged between the two sliding blocks, both ends of the pressing block are in a slope shape, the slope of the pressing block is inclined downward, and the two slopes of the pressing block are respectively attached to and slidably connected to the slopes of the two sliding blocks; second rotating openings for the two sliding blocks to enter are respectively provided at the bottom ends of the two rotating arms, second rotating pins are connected to both side surfaces of the sliding block, and a second waist-shaped hole for the second rotating pin to rotate is provided on the side surface of the bottom end of the rotating arm; the driving member is installed in the cylinder block, and the driving member is used to drive the pressing block to move up and down.

[0011] Optionally, T-shaped blocks are connected to the slopes at both ends of the pressing block, and T-shaped grooves for the two T-shaped blocks to slide are provided on the slopes of the two sliding blocks.

[0012] Optionally, a slide bar slides at the bottom of each sliding block, the slide bar penetrates through the sliding block, bolts are connected to the mutually remote ends of the two slide bars, the bolts are threadedly connected to the installation seat, and the ends of the bolts extend into the installation cavity.

[0013] Optionally, the driving member includes a second piston head and a second piston rod. The second piston head slides on the inner wall of the cylinder body. The second piston head is located below the first piston head. The bottom surface of the second piston head is connected with two arc-shaped plates symmetrically arranged about the axis of the second piston head. The second piston rod slides at the bottom of the cylinder body. The bottom end of the second piston rod is connected to the middle position of the top surface of the pressing block. Two symmetrically arranged positioning pins are connected to the peripheral surface of the top of the second piston rod. The inner walls of the two arc-shaped plates are respectively attached to the peripheral surface of the top of the second piston rod. Strip-shaped grooves for the two positioning pins to slide up and down are respectively arranged in the two arc-shaped plates. A regulating valve for communicating both sides of the first piston head is arranged in the first piston head.

[0014] Optionally, there are four regulating valves. The four regulating valves are evenly distributed around the circumference of the first piston head. Two of the regulating valves are used to convey the hydraulic oil on the side of the first piston head away from the second piston head to the other side of the first piston head, and the two regulating valves are symmetrically arranged. The other two regulating valves are used to convey the hydraulic oil on the side of the first piston head close to the second piston head to the other side of the first piston head, and the two regulating valves are symmetrically arranged.

[0015] Optionally, the regulating valve includes a valve tube, a spring, a sealing plug, a sliding rod and a sealing ring. The sealing plug is threadedly connected to the inner wall of one end of the valve tube. The spring is arranged in the valve tube. One end of the sliding rod slides in the valve tube. The end face of the sliding rod presses against one end of the spring. The other end of the spring presses against the sealing plug. The sealing ring is connected to the peripheral surface of the sliding rod. A through hole for inserting the valve tube is arranged in the first piston head. The end face of the sealing plug away from the valve tube is flush with the side face of the first piston head. The end face of the sliding rod away from the spring is flush with the other side face of the first piston head. The sealing ring slides and seals on the inner wall of the through hole. A limiting ring is connected to the inner wall of the end of the through hole away from the sealing plug. The limiting ring presses against the side face of the sealing ring. Two flow channels are arranged on the inner wall of the through hole. One end of the flow channel is located at the sealing ring. The other end of the flow channel communicates with the side face of the first piston head close to the sealing plug. The valve tube is threadedly connected to the inner wall of the through hole.

[0016] In summary, the present application includes at least one of the following beneficial technical effects:

[0017] 1. The manipulator sleevs the workpiece outside the conical frustum and places it on the top surface of the placement table. At this time, the axis of the workpiece is perpendicular to the placement table, and the axis of the output shaft is also perpendicular to the placement table. The first driving mechanism drives the sliding plate to slide downward along the sliding groove. Since the sliding plate slides obliquely, the tops of the three sliding plates move away from each other during the downward sliding process, so that the outer peripheral surface of the sector plate presses against the inner peripheral surface of the workpiece cavity. At this time, when the first driving mechanism continues to pull down the sliding plate, the sliding plate pulls down the workpiece through the sector plate, so that the bottom surface of the workpiece presses against the top surface of the placement table. At this time, the axis of the workpiece is still perpendicular to the placement table. Subsequently, the second driving mechanism drives the left jaw and the right jaw to clamp the workpiece. Since the workpiece is pressed against the top surface of the placement table by the sector plate, the workpiece is not likely to tilt when the left jaw and the right jaw strike the workpiece, so the axis of the workpiece is still perpendicular to the placement table, enabling the tool to accurately machine the workpiece and reducing the error during workpiece production.

[0018] 2. When the first oil pipe injects hydraulic oil into the cylinder body, the first piston head pushes the second piston head to slide in the cylinder body together, and the positioning pin slides in the strip-shaped groove until the sector plate presses against the inner wall of the workpiece cavity. At this time, the first piston head stops moving. Since hydraulic oil is continuously injected into the valve body, the oil pressure on the side of the first piston head away from the second piston head increases, and the hydraulic oil pushes the sliding rods of the two regulating valves. The sliding rods press down the springs in the valve pipes until the sealing rings cross the ends of the flow channels. At this time, the flow channels are connected to both sides of the first piston head, and the hydraulic oil gradually enters between the first piston head and the second piston head through the flow channels. The hydraulic oil squeezes the second piston head, and the second piston head then pushes the second piston rod. The second piston rod presses down the lower pressing block. Under the action of the hydraulic oil, the other two regulating valves make the sealing rings press against the limiting rings.

[0019] 3. When the second oil pipe injects hydraulic oil into the cylinder body, the hydraulic oil pushes the second piston head, and the second piston head leaves the second piston rod. The positioning pin slides in the strip-shaped groove, and the arc-shaped plate pulls the positioning pin, and the positioning pin pulls the second piston rod. Then the second piston rod pulls the lower pressing block. During the rising process of the second piston head, the second piston head pushes the first piston head through the hydraulic oil until the push-pull disc fits against the bottom surface of the placement table and the first piston head is restricted. At this time, the second piston head squeezes the hydraulic oil between the first piston head and the second piston head, and the hydraulic oil pushes the sliding rods of the two regulating valves. The sliding rods press up the springs in the valve pipes until the sealing rings cross the ends of the flow channels. At this time, the flow channels are connected to both sides of the first piston head, and the hydraulic oil gradually enters the side of the first piston head away from the second piston head until the first piston head and the second piston head fit together. Under the action of the hydraulic oil, the other two regulating valves make the sealing rings press against the limiting rings. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the machine tool positioning workbench according to the embodiment of the present application;

[0021] Figure 2 It is a schematic cross-sectional structure diagram of the mounting base in the embodiment of the present application;

[0022] Figure 3 It is a schematic cross-sectional structure diagram of the cylinder block in the embodiment of the present application;

[0023] Figure 4 It is a schematic cross-sectional structure diagram of the first piston head and the valve pipe in the embodiment of the present application;

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the first piston head in the embodiment of the present application.

[0025] Explanation of reference numerals:

[0026] 01, workpiece; 1, machine tool base; 2, mounting base; 21, left clamping jaw; 22, right clamping jaw; 23, mounting cavity; 24, guide plate; 241, trapezoidal groove; 242, moving groove; 25, trapezoidal slider; 3, placing table; 31, sliding plate; 311, sector plate; 312, notch; 32, frustum; 321, sliding groove; 4, first driving mechanism; 41, cylinder block; 411, first oil pipe; 412, second oil pipe; 42, first piston rod; 43, first piston head; 431, through hole; 432, limiting ring; 433, flow channel; 44, push-pull disc; 45, limiting block; 5, second driving mechanism; 51, push-pull plate; 511, first rotating pin; 52, rotating shaft; 53, rotating arm; 531, first rotating port; 532, first waist-shaped hole; 533, second rotating port; 534, second waist-shaped hole; 54, driving assembly; 541, sliding block; 5411, second rotating pin; 5412, T-shaped groove; 5413, sliding rod; 5414, bolt; 542, pressing block; 5421, T-shaped block; 543, driving part; 5431, second piston head; 5432, second piston rod; 5433, arc plate; 5434, positioning pin; 5435, strip-shaped groove; 6, regulating valve; 61, valve pipe; 62, spring; 63, sealing plug; 64, sliding rod; 65, sealing ring. Detailed implementation manners

[0027] The following will further elaborate on the present application in conjunction with the attached Figures 1-5 to make a more detailed description of the present application.

[0028] The embodiment of the present application discloses a machine tool positioning workbench with an automatic leveling function. Refer to Figures 1-5, the machine tool positioning workbench includes a mounting seat 2 installed on the top surface of the machine tool base 1, a left jaw 21 and a right jaw 22 slidably connected to the top surface of the mounting seat 2, and a placement table 3; the placement table 3 is U-shaped, and both ends of the placement table 3 are connected to the top surface of the mounting seat 2, and the placement table 3 is used for placing the workpiece 01; a frustum 32 is integrally formed on the top surface of the placement table 3, and three sliding plates 31 are inclined and slidably arranged in the placement table 3, and the three sliding plates 31 are evenly distributed around the circumference of the frustum 32. The tops of the three sliding plates 31 are inclined towards the frustum 32, and a sliding groove 321 for the sliding plate 31 to slide is arranged on the circumferential surface of the frustum 32; the bottom end of the sliding plate 31 extends out of the bottom surface of the placement table 3, and the top end of the sliding plate 31 extends out of the top surface of the placement table 3; a sector plate 311 is detachably connected to the top end of the sliding plate 31, the cavity of the workpiece 01 is sleeved outside the frustum 32 and the sector plate 311, and the outer peripheral surface of the sector plate 311 faces the inner wall of the cavity of the workpiece 01; a mounting cavity 23 is arranged in the mounting seat 2, and a first driving mechanism 4 for driving the sliding plate 31 to reciprocate along the sliding groove 321 is arranged in the mounting cavity 23, and a second driving mechanism 5 for driving the left jaw 21 and the right jaw 22 to open and close is arranged in the mounting cavity 23.

[0029] The manipulator sleeved the workpiece 01 outside the frustum 32 and placed it on the top surface of the placement table 3. At this time, the axis of the workpiece 01 is perpendicular to the placement table 3, and the axis of the output shaft is also perpendicular to the placement table 3; the first driving mechanism 4 drives the sliding plate 31 to slide downward along the sliding groove 321. Since the sliding plate 31 slides obliquely, during the downward sliding of the sliding plate 31, the tops of the three sliding plates 31 are away from each other, so that the outer peripheral surface of the sector plate 311 is pressed against the inner peripheral surface of the cavity of the workpiece 01. At this time, when the first driving mechanism 4 continues to pull down the sliding plate 31, the sliding plate 31 pulls down the workpiece 01 through the sector plate 311, so that the bottom surface of the workpiece 01 is pressed against the top surface of the placement table 3. At this time, the axis of the workpiece 01 is still perpendicular to the placement table 3; then the second driving mechanism 5 drives the left jaw 21 and the right jaw 22 to clamp the workpiece 01. Since the workpiece 01 is pressed against the top surface of the placement table 3 by the sector plate 311, when the left jaw 21 and the right jaw 22 impact the workpiece 01, the workpiece 01 is not likely to tilt, so the axis of the workpiece 01 is still perpendicular to the placement table 3, enabling the tool to accurately machine the workpiece 01 and reducing the error during the production of the workpiece 01.

[0030] When it is necessary to remove the workpiece 01, the second driving mechanism 5 drives the left jaw 21 and the right jaw 22 to separate, and the first driving mechanism 4 drives the sliding plate 31 to move upward. The tops of the three sliding plates 31 approach each other, so the three sector plates 311 approach each other, releasing the pressing of the sector plate 311 against the inner wall of the cavity of the workpiece 01. At this time, the workpiece 01 can be removed.

[0031] The first driving mechanism 4 includes a cylinder block 41, a first piston rod 42, a first piston head 43 and a push-pull disc 44; the cylinder block 41 is installed in the installation cavity 23, the axis of the cylinder block 41 is collinear with the axis of the frustum 32, the first piston head 43 slides on the inner wall of the cylinder block 41, the end of the first piston rod 42 is connected to the top surface of the first piston head 43, and the top end of the first piston rod 42 extends out of the top of the cylinder block 41 and out of the top surface of the mounting seat 2; the push-pull disc 44 is coaxially connected to the top end of the first piston rod 42, one end of a limiting block 45 is connected to the bottom end of the sliding plate 31, the top surface of the other end of the limiting block 45 abuts against the bottom surface of the push-pull disc 44, a notch 312 for the push-pull disc 44 to extend into is provided at the bottom end of the sliding plate 31, and the top surface of the push-pull disc 44 abuts against the top surface of the notch 312; a first oil pipe 411 is inserted and communicated with the circumferential surface of the top of the cylinder block 41, and a second oil pipe 412 is inserted and communicated with the circumferential surface of the bottom of the cylinder block 41.

[0032] When it is necessary to drive the sliding plate 31 to descend, hydraulic oil is injected into the cylinder block 41 through the first oil pipe 411. The hydraulic oil pushes the first piston head 43, and the first piston head 43 moves downward. The first piston head 43 presses the hydraulic oil at the other end of the cylinder block 41 out of the second oil pipe 412. The first piston head 43 pulls down the first piston rod 42, the first piston rod 42 pulls down the push-pull disc 44, the push-pull disc 44 pulls down the limiting block 45, and the limiting block 45 pulls down the sliding plate 31; when it is necessary to drive the sliding plate 31 to ascend, hydraulic oil is injected into the cylinder block 41 through the second oil pipe 412. The hydraulic oil pushes the first piston head 43, and the first piston head 43 moves upward. The first piston head 43 presses the hydraulic oil at the other end of the cylinder block 41 out of the first oil pipe 411. The first piston head 43 pushes up the first piston rod 42, the first piston rod 42 pushes up the push-pull disc 44, and the push-pull disc 44 pushes up the top surface of the notch 312, then the sliding plate 31 slides upward; during the up and down movement of the push-pull disc 44, the push-pull disc 44 slides on the top surface of the notch 312 and the top surface of the limiting block 45.

[0033] Two guide plates 24 symmetrically arranged with respect to the frustum 32 are installed on the top surface of the mounting seat 2. Trapezoidal sliders 25 are connected to the bottom surfaces of the left clamping jaw 21 and the right clamping jaw 22 respectively. Trapezoidal grooves 241 for the two trapezoidal sliders 25 to slide are respectively provided on the top surfaces of the two guide plates 24, and the trapezoidal grooves 241 penetrate through both ends of the guide plates 24; the second driving mechanism 5 is used to drive the trapezoidal sliders 25 to slide in the trapezoidal grooves 241.

[0034] The second driving mechanism 5 includes a push-pull plate 51, a rotating shaft 52, a rotating arm 53, and a driving assembly 54; there are two push-pull plates 51, and the two push-pull plates 51 are respectively connected to the bottom surfaces of the two trapezoidal sliders 25 near each other. The bottom end of the push-pull plate 51 extends into the installation cavity 23. The bottom surface of the trapezoidal groove 241 and the top surface of the installation seat 2 are provided with moving grooves 242 for the push-pull plate 51 to slide; there are two rotating shafts 52, and the two rotating shafts 52 are fixedly connected to the inner wall of the installation cavity 23. The two rotating shafts 52 are symmetrically arranged about the axis of the frustum 32; there are two rotating arms 53, and the two rotating arms 53 are respectively rotatably connected to the two rotating shafts 52; the top end of the rotating arm 53 is provided with a first rotating opening 531 for the bottom end of the push-pull plate 51 to enter. Both side surfaces of the bottom end of the push-pull plate 51 are connected with first rotating pins 511, and the side surface of the top end of the rotating arm 53 is provided with first waist-shaped holes 532 for the first rotating pins 511 to rotate; the driving assembly 54 is installed in the installation cavity 23, and the driving assembly 54 is used to drive the bottom ends of the two rotating arms 53 to approach each other synchronously or move away from each other synchronously.

[0035] When it is necessary to drive the left jaw 21 and the right jaw 22 to clamp the workpiece 01, the driving assembly 54 drives the bottom ends of the two rotating arms 53 to move away from each other. The rotating arm 53 rotates with the rotating shaft 52 as the center. The top end of the rotating arm 53 pushes the first rotating pin 511 towards the frustum 32. The first rotating pin 511 pulls the push-pull plate 51, and the push-pull plate 51 pulls the trapezoidal slider 25 to slide towards the frustum 32 in the trapezoidal groove 241 until the left jaw 21 and the right jaw 22 clamp the workpiece 01; when it is necessary to release the clamping of the workpiece 01, the driving assembly 54 drives the bottom ends of the two rotating arms 53 to approach each other first. The rotating arm 53 rotates with the rotating shaft 52 as the center. The top end of the rotating arm 53 pushes the first rotating pin 511 away from the frustum 32. The first rotating pin 511 pulls the push-pull plate 51, and the push-pull plate 51 pulls the trapezoidal slider 25 to slide towards the end away from the frustum 32 in the trapezoidal groove 241, releasing the clamping of the workpiece 01 by the left jaw 21 and the right jaw 22.

[0036] The driving assembly 54 includes a sliding block 541, a pressing block 542 and a driving member 543; there are two sliding blocks 541, and the two sliding blocks 541 slide on the bottom surface of the installation cavity 23, and the two sliding blocks 541 are symmetrically arranged about the axis of the frustum 32; the side surfaces of the sliding blocks 541 close to each other are sloped surfaces, and the sloped surfaces of the sliding blocks 541 slope obliquely upwards; the pressing block 542 is arranged between the two sliding blocks 541, and both ends of the pressing block 542 are sloped surfaces, and the sloped surfaces of the pressing block 542 slope obliquely downwards, and the two sloped surfaces of the pressing block 542 are respectively attached to and slidably connected to the sloped surfaces of the two sliding blocks 541; second rotating ports 533 for the two sliding blocks 541 to enter are respectively arranged at the bottom ends of the two rotating arms 53, second rotating pins 5411 are connected to both side surfaces of the sliding block 541, and second waist-shaped holes 534 for the second rotating pins 5411 to rotate are arranged on the side surface of the bottom end of the rotating arm 53; the driving member 543 is installed on the cylinder block 41, and the driving member 543 is used to drive the pressing block 542 to move up and down.

[0037] T-shaped blocks 5421 are connected to the sloped surfaces at both ends of the pressing block 542, and T-shaped grooves 5412 for the two T-shaped blocks 5421 to slide are arranged on the sloped surfaces of the two sliding blocks 541, and the T-shaped grooves 5412 penetrate through the top and bottom ends of the sliding blocks 541.

[0038] A sliding rod 5413 slides at the bottom of each sliding block 541, the sliding rod 5413 is parallel to the bottom surface of the installation cavity 23, the sliding rod 5413 penetrates through the sliding block 541, bolts 5414 are connected to the ends of the two sliding rods 5413 away from each other, the bolts 5414 are threadedly connected to the mounting seat 2, and the ends of the bolts 5414 extend into the installation cavity 23.

[0039] When it is necessary to drive the bottom ends of the rotating arms 53 to move away from each other, the driving member 543 drives the pressing block 542 to descend, the pressing block 542 pushes the two sliding blocks 541 to move away from each other through the sloped surfaces, the T-shaped blocks 5421 slide in the T-shaped grooves 5412, the sliding blocks 541 slide along the sliding rods 5413, and the two sliding blocks 541 push the bottom ends of the two rotating arms 53 to move away from each other through the second rotating pins 5411; when it is necessary to drive the bottom ends of the rotating arms 53 to move closer to each other, the driving member 543 drives the pressing block 542 to ascend, the pressing block 542 drives the two sliding blocks 541 to move closer to each other through the T-shaped blocks 5421, the T-shaped blocks 5421 slide in the T-shaped grooves 5412, the sliding blocks 541 slide along the sliding rods 5413, and the two sliding blocks 541 push the bottom ends of the two rotating arms 53 to move closer to each other through the second rotating pins 5411.

[0040] The driving member 543 includes a second piston head 5431 and a second piston rod 5432. The second piston head 5431 slides on the inner wall of the cylinder block 41. The second piston head 5431 is located below the first piston head 43. Two arc-shaped plates 5433 symmetrically arranged about the axis of the second piston head 5431 are connected to the bottom surface of the second piston head 5431. The second piston rod 5432 slides at the bottom of the cylinder block 41. The bottom end of the second piston rod 5432 is connected to the middle position of the top surface of the lower pressing block 542. Two symmetrically arranged positioning pins 5434 are connected to the circumferential surface of the top of the second piston rod 5432. The inner walls of the two arc-shaped plates 5433 are respectively attached to the circumferential surface of the top of the second piston rod 5432. Strip-shaped grooves 5435 for the two positioning pins 5434 to slide up and down are respectively arranged in the two arc-shaped plates 5433. A regulating valve 6 for communicating the two sides of the first piston head 43 is arranged in the first piston head 43.

[0041] There are four regulating valves 6, and the four regulating valves 6 are evenly distributed around the circumference of the first piston head 43. Two of the regulating valves 6 are used to convey the hydraulic oil on the side of the first piston head 43 away from the second piston head 5431 to the other side of the first piston head 43, and the two regulating valves 6 are symmetrically arranged. The other two regulating valves 6 are used to convey the hydraulic oil on the side of the first piston head 43 close to the second piston head 5431 to the other side of the first piston head 43, and the two regulating valves 6 are symmetrically arranged.

[0042] The regulating valve 6 includes a valve tube 61, a spring 62, a sealing plug 63, a sliding rod 64 and a sealing ring 65. The sealing plug 63 is threadedly connected to the inner wall of one end of the valve tube 61. The spring 62 is arranged in the valve tube 61. One end of the sliding rod 64 slides in the valve tube 61. The end face of the sliding rod 64 presses against one end of the spring 62. The other end of the spring 62 presses against the sealing plug 63. The sealing ring 65 is connected to the circumferential surface of the sliding rod 64. The diameter of the sealing ring 65 is equal to the diameter of the valve tube 61. A through hole 431 for inserting the valve tube 61 is arranged in the first piston head 43. The end face of the sealing plug 63 away from the valve tube 61 is flush with the side face of the first piston head 43. The end face of the sliding rod 64 away from the spring 62 is flush with the other side face of the first piston head 43. The sealing ring 65 slides and seals on the inner wall of the through hole 431. A limiting ring 432 is connected to the inner wall of the end of the through hole 431 away from the sealing plug 63. The limiting ring 432 presses against the side face of the sealing ring 65. Two flow channels 433 are arranged on the inner wall of the through hole 431. One end of the flow channel 433 is located at the sealing ring 65. The other end of the flow channel 433 communicates with the side face of the first piston head 43 close to the sealing plug 63. The valve tube 61 is threadedly connected to the inner wall of the through hole 431.

[0043] When the first oil pipe 411 injects hydraulic oil into the cylinder block 41, the first piston head 43 pushes the second piston head 5431 to slide together in the cylinder block 41, and the positioning pin 5434 slides in the strip-shaped groove 5435 until the sector plate 311 presses against the inner wall of the workpiece 01 cavity. At this time, the first piston head 43 stops moving. Due to the continuous injection of hydraulic oil into the valve body, the oil pressure on the side of the first piston head 43 away from the second piston head 5431 increases, and the hydraulic oil pushes the sliding rods 64 of the two regulating valves 6. The sliding rods 64 press down the spring 62 in the valve pipe 61 until the sealing ring 65 passes over the end of the flow channel 433. At this time, the flow channel 433 communicates with both sides of the first piston head 43, and the hydraulic oil gradually enters between the first piston head 43 and the second piston head 5431 through the flow channel 433. The hydraulic oil squeezes the second piston head 5431, and the second piston head 5431 then pushes the second piston rod 5432. The second piston rod 5432 presses down the lower pressing block 542. Under the action of the hydraulic oil, the other two regulating valves 6 make the sealing ring 65 press against the limiting ring 432.

[0044] When the second oil pipe 412 injects hydraulic oil into the cylinder block 41, the hydraulic oil pushes the second piston head 5431. The second piston head 5431 leaves the second piston rod 5432, and the positioning pin 5434 slides in the strip-shaped groove 5435. The arc-shaped plate 5433 pulls the positioning pin 5434, and the positioning pin 5434 pulls the second piston rod 5432, so the second piston rod 5432 pulls the lower pressing block 542. During the rising process of the second piston head 5431, the second piston head 5431 pushes the first piston head 43 through the hydraulic oil until the push-pull disc 44 fits against the bottom surface of the placing table 3. The first piston head 43 is restricted. At this time, the second piston head 5431 squeezes the hydraulic oil between the first piston head 43 and the second piston head 5431. The hydraulic oil pushes the sliding rods 64 of the two regulating valves 6. The sliding rods 64 press up the spring 62 in the valve pipe 61 until the sealing ring 65 passes over the end of the flow channel 433. At this time, the flow channel 433 communicates with both sides of the first piston head 43, and the hydraulic oil gradually enters the side of the first piston head 43 away from the second piston head 5431 through the flow channel 433 until the first piston head 43 and the second piston head 5431 fit together. Under the action of the hydraulic oil, the other two regulating valves 6 make the sealing ring 65 press against the limiting ring 432.

[0045] The implementation principle of a machine tool positioning workbench with an automatic leveling function in an embodiment of the present application is as follows: The manipulator sleeved the workpiece 01 outside the conical body 32 and placed it on the top surface of the placement table 3. At this time, the axis of the workpiece 01 is perpendicular to the placement table 3, and the axis of the output shaft is also perpendicular to the placement table 3; The first driving mechanism 4 drives the sliding plate 31 to slide downward along the sliding groove 321. Since the sliding plate 31 slides obliquely, during the downward sliding of the sliding plate 31, the tops of the three sliding plates 31 are away from each other, so that the outer peripheral surface of the sector plate 311 is pressed against the inner peripheral surface of the cavity of the workpiece 01. At this time, when the first driving mechanism 4 continues to pull down the sliding plate 31, the sliding plate 31 pulls down the workpiece 01 through the sector plate 311, so that the bottom surface of the workpiece 01 is pressed against the top surface of the placement table 3. At this time, the axis of the workpiece 01 is still perpendicular to the placement table 3; Subsequently, the second driving mechanism 5 drives the left jaw 21 and the right jaw 22 to clamp the workpiece 01. Since the workpiece 01 is pressed against the top surface of the placement table 3 by the sector plate 311, when the left jaw 21 and the right jaw 22 impact the workpiece 01, the workpiece 01 is not likely to tilt, so the axis of the workpiece 01 is still perpendicular to the placement table 3, enabling the tool to accurately process the workpiece 01 and reducing the error during the production of the workpiece 01.

[0046] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A machine tool positioning workbench with automatic leveling function, characterized in that: The invention comprises a mounting seat (2), a left clamping jaw (21) and a right clamping jaw (22) slidably connected to the top surface of the mounting seat (2), and a placing table (3); the placing table (3) is U-shaped, and the two ends of the placing table (3) are connected to the top surface of the mounting seat (2), and the placing table (3) is used to place a workpiece (01); the top surface of the placing table (3) is connected to a truncated cone body (32), and three sliding plates (31) are obliquely and slidably arranged inside the placing table (3), and the three sliding plates (31) are evenly distributed around the circumference of the truncated cone body (32), and the circumferential surface of the truncated cone body (32) is provided with sliding grooves (321) for the sliding plates (31) to slide; the sliding plates (3 1) The bottom end extends out of the bottom surface of the placing table (3), and the top end of the sliding plate (31) extends out of the top surface of the placing table (3); the top end of the sliding plate (31) is detachably connected to a fan-shaped plate (311), and the cavity of the workpiece (01) is sleeved outside the truncated table body (32) and the fan-shaped plate (311); the mounting seat (2) is provided with a mounting cavity (23), and the mounting cavity (23) is provided with a first driving mechanism (4) for driving the sliding plate (31) to slide back and forth along the sliding groove (321), and the mounting cavity (23) is provided with a second driving mechanism (5) for driving the left clamping jaw (21) and the right clamping jaw (22) to open and close; The first driving mechanism (4) comprises a cylinder body (41), a first piston rod (42), a first piston head (43) and a push-pull disc (44); the cylinder body (41) is installed in the installation cavity (23), the axis of the cylinder body (41) is colinear with the axis of the truncated cone body (32), the first piston head (43) slides on the inner wall of the cylinder body (41), the end of the first piston rod (42) is connected to the top surface of the first piston head (43), and the top end of the first piston rod (42) extends out of the top of the cylinder body (41) and the top surface of the installation seat (2); the push-pull disc (44) The disk (44) is coaxially connected to the top end of the first piston rod (42); the bottom end of the sliding plate (31) is connected to one end of a limiting block (45); the top surface of the other end of the limiting block (45) is in contact with the bottom surface of the push-pull disc (44); the bottom end of the sliding plate (31) is provided with a notch (312) for the push-pull disc (44) to extend into; the top surface of the push-pull disc (44) is in contact with the top surface of the notch (312); the top circumference of the cylinder body (41) is plugged and connected to a first oil pipe (411); the bottom circumference of the cylinder body (41) is plugged and connected to a second oil pipe (412).

2. The machine tool positioning workbench with automatic leveling function according to claim 1, characterized in that: Two guide plates (24) symmetrically arranged about the truncated cone (32) are installed on the top surface of the mounting seat (2); the bottom surfaces of the left clamping jaw (21) and the right clamping jaw (22) are both connected with a trapezoidal slider (25); the top surfaces of the two guide plates (24) are respectively provided with a trapezoidal groove (241) for the two trapezoidal sliders (25) to slide; the trapezoidal groove (241) passes through both ends of the guide plates (24); the second driving mechanism (5) is used to drive the trapezoidal slider (25) to slide in the trapezoidal groove (241).

3. The machine tool positioning workbench with automatic leveling function according to claim 2, characterized in that: The second driving mechanism (5) comprises a push-pull plate (51), a rotating shaft (52), a rotating arm (53) and a driving assembly (54); two push-pull plates (51) are provided, and the two push-pull plates (51) are respectively connected to the bottom surfaces of the two trapezoidal sliding blocks (25) close to each other at one end, and the bottom end of the push-pull plate (51) extends into the installation cavity (23), and the bottom surface of the trapezoidal groove (241) and the top surface of the installation seat (2) are provided with a movable groove (242) for the push-pull plate (51) to slide; two rotating shafts (52) are provided, and the two rotating shafts (52) are fixedly connected to the inner wall of the installation cavity (23), and the two rotating shafts (52) are relative to the truncated cone body (3 2) The axis is symmetrically arranged; two rotating arms (53) are arranged, and the two rotating arms (53) are respectively rotatably connected to the two rotating shafts (52); the top of the rotating arm (53) is provided with a first rotating opening (531) for the bottom end of the push-pull plate (51) to enter, the two side surfaces of the bottom end of the push-pull plate (51) are connected with a first rotating pin (511), and the top side surface of the rotating arm (53) is provided with a first waist-shaped hole (532) for the first rotating pin (511) to rotate; the driving component (54) is installed in the installation cavity (23), and the driving component (54) is used to drive the bottom ends of the two rotating arms (53) to synchronously approach each other or synchronously move away from each other.

4. The machine tool positioning workbench with automatic leveling function according to claim 3, characterized in that: The driving assembly (54) comprises a sliding block (541), a pressing block (542) and a driving member (543); two sliding blocks (541) are provided, the two sliding blocks (541) slide on the bottom surface of the mounting cavity (23), and the two sliding blocks (541) are symmetrically arranged about the axis of the truncated cone (32); the sides of the sliding blocks (541) close to each other are sloped, and the slope of the sliding blocks (541) is inclined upward; the pressing block (542) is arranged between the two sliding blocks (541), the two ends of the pressing block (542) are sloped, and the slope of the pressing block (542) is inclined downward, and the pressing block The two slope surfaces of (542) are respectively fitted to the slope surfaces of the two sliding blocks (541) and are slidably connected to the slope surfaces of the sliding blocks (541); the bottom ends of the two rotating arms (53) are respectively provided with second rotating openings (533) for the two sliding blocks (541) to enter, and the two side surfaces of the sliding blocks (541) are connected with second rotating pins (5411), and the side surfaces of the bottom ends of the rotating arms (53) are provided with second waist-shaped holes (534) for the second rotating pin (5411) to rotate; the driving member (543) is installed on the cylinder body (41), and the driving member (543) is used to drive the lower pressing block (542) to rise and fall.

5. The machine tool positioning workbench with automatic leveling function according to claim 4, characterized in that: The slopes at both ends of the pressing block (542) are connected to T-shaped blocks (5421), and the slopes of the two sliding blocks (541) are provided with T-shaped grooves (5412) for the two T-shaped blocks (5421) to slide.

6. The machine tool positioning workbench with automatic leveling function according to claim 4, characterized in that: A sliding rod (5413) is slidably disposed at the bottom of each sliding block (541), and the sliding rod (5413) passes through the sliding block (541). Two ends of the two sliding rods (5413) that are away from each other are connected with bolts (5414), and the bolts (5414) are threadedly connected to the mounting seat (2), and the ends of the bolts (5414) extend into the mounting cavity (23).

7. The machine tool positioning workbench with automatic leveling function according to claim 4, characterized in that: The driving member (543) comprises a second piston head (5431) and a second piston rod (5432). The second piston head (5431) slides on the inner wall of the cylinder body (41). The second piston head (5431) is located below the first piston head (43). The bottom surface of the second piston head (5431) is connected to two arc-shaped plates (5433) symmetrically arranged about the axis of the second piston head (5431). The second piston rod (5432) slides on the bottom of the cylinder body (41). The second piston rod (5432) The bottom end is connected to the middle position of the top surface of the lower pressure block (542); the top circumference of the second piston rod (5432) is connected to two symmetrically arranged positioning pins (5434); the inner walls of the two arc-shaped plates (5433) are both in contact with the top circumference of the second piston rod (5432); the two arc-shaped plates (5433) are respectively provided with strip grooves (5435) for the two positioning pins (5434) to slide up and down; the first piston head (43) is provided with a regulating valve (6) for connecting the two sides of the first piston head (43).

8. The machine tool positioning workbench with automatic leveling function according to claim 7, characterized in that: The regulating valves (6) include four regulating valves (6) which are evenly distributed around the circumference of the first piston head (43); two of the regulating valves (6) are used to transport the hydraulic oil on the side of the first piston head (43) away from the second piston head (5431) to the other side of the first piston head (43), and the two regulating valves (6) are symmetrically arranged; the other two regulating valves (6) are used to transport the hydraulic oil on the side of the first piston head (43) close to the second piston head (5431) to the other side of the first piston head (43), and the two regulating valves (6) are symmetrically arranged.

9. The machine tool positioning workbench with automatic leveling function according to claim 8, characterized in that: The regulating valve (6) comprises a valve tube (61), a spring (62), a sealing plug (63), a sliding rod (64) and a sealing ring (65); the sealing plug (63) is threadedly connected to the inner wall of one end of the valve tube (61); the spring (62) is arranged in the valve tube (61); one end of the sliding rod (64) slides in the valve tube (61); the end surface of the sliding rod (64) is pressed against one end of the spring (62); the other end of the spring (62) is pressed against the sealing plug (63); and the sealing ring (65) is connected to the circumferential surface of the sliding rod (64); a through hole (431) for inserting the valve tube (61) is arranged in the first piston head (43); the end surface of the sealing plug (63) away from the valve tube (61) is in contact with the first piston head (43); The side of the piston head (43) is flush, the end face of the sliding rod (64) away from the spring (62) is flush with the other side of the first piston head (43), and the sealing ring (65) is slidably sealed on the inner wall of the through hole (431); the inner wall of the end of the through hole (431) away from the sealing plug (63) is connected to a limiting ring (432), and the limiting ring (432) is pressed against the side of the sealing ring (65); two flow channels (433) are provided on the inner wall of the through hole (431), one end of the flow channel (433) is located at the sealing ring (65), and the other end of the flow channel (433) is connected to the side of the first piston head (43) close to the sealing plug (63); the valve tube (61) is threadedly connected to the inner wall of the through hole (431).

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