High-precision low-noise punching machine
By using hydraulic oil interference matching technology in the slider connection part of the punching machine, the problems of high noise and low accuracy during the punching process are solved, and low noise and high precision punching machine operation is achieved.
Patent Information
- Application Number
- CN202411825150.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-02-11
AI Technical Summary
During the stamping process, the noise and accuracy of the punching machine are high due to the gap between the slider and the connecting rod, which affects the normal operation of the punching machine.
By installing the fixing sleeve and the mounting sleeve on the connecting part of the slider and injecting hydraulic oil into the oil cavity, the threaded connection between the mounting sleeve and the connecting rod is in an interference fit state, tightening the connection relationship and avoiding gaps The emergence of
It effectively reduces the noise of the punch, improves the accuracy of the punch, avoids unnecessary strokes of the slider, and ensures the stable operation of the punch.
Smart Images
Figure CN119407029A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of punching machines, in particular to a high-precision and low-noise punching machine. Background Art
[0002] Punching machines are mainly used to form metal plates or punch holes in metal plates. They are widely used in electronics, communications, computers, household appliances, furniture, transportation vehicles (such as cars, motorcycles, bicycles) and other fields. Mechanical punching machines are usually composed of a frame, a slider, a crank mechanism, a transmission system and a control system. Among them, the frame is the supporting structure of the punching machine, the slider is used to install the mold and perform stamping processing, the crank mechanism converts the rotational motion into the reciprocating linear motion of the slider, the transmission system is responsible for transmitting power, and the control system is used to control the operation and stop of the punching machine. In the specific application process, the main motor is started to drive the flywheel to rotate, and the flywheel is operated. The function is to store and release energy so that the punch press can maintain a stable state of motion during the stamping process. Then, the flywheel is connected to the gear through the clutch to transmit the rotational motion to the gear; the main motor drives the small gear to rotate, and the small gear is coaxially connected to the large gear to achieve deceleration and increase torque. In this way, the large gear can rotate at a slower speed but with greater force. When the manipulator is stepped on, the clutch is engaged and disengaged, and the power is output to the crankshaft. The shape of the crankshaft enables it to produce reciprocating linear motion during the rotation process. When the crankshaft rotates, the connecting rod drives the slider to perform reciprocating linear motion. The upper die is installed on the slider, and the lower die is installed on the workbench. When the slider moves downward, the upper die contacts the lower die and applies pressure to punch the material placed between them; In order to ensure the accuracy of motion conversion, withstand and transmit punching force, maintain the smoothness of motion and prevent component damage, the slider in the punch press usually limits the end of the connecting rod by extrusion. However, in the actual punching process, the slider ball head seat and the connecting rod spherical end will be subject to a large punching force, which will cause a certain elastic deformation of the connection between the two. This elastic deformation will change the matching relationship between the two, and then produce a gap; when there is a gap between the slider ball head seat and the connecting rod spherical end, in the actual punching process, they will move relative to each other, and when they transition from free movement to contact movement, they will cause a strong impact. This noise has a wide frequency band and a strong high-frequency part; the larger the gap, the higher the noise. In addition, when the gap is constant, the higher the number of slider strokes, the higher the noise ratio, which will also affect the accuracy of the punch press. For this reason, we propose a high-precision and low-noise punch press. Summary of the invention
[0003] The object of the present invention is to provide a high-precision and low-noise punching machine to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-precision and low-noise punching machine, comprising a frame, a power transmission mechanism arranged inside the frame, and a crankshaft mechanism is also installed on the power transmission mechanism, and a connecting rod is rotatably installed on the crankshaft mechanism, a slider is installed inside the frame, and a connecting part connected to the connecting rod is arranged inside the slider; the connecting part comprises a fixed sleeve fixedly installed inside the slider, and a plurality of mounting sleeves are installed in parallel inside the fixed sleeve, each mounting sleeve is threadedly connected to the connecting rod, one of the mounting sleeves forms an oil cavity with the inside of the fixed sleeve, hydraulic oil is injected into the oil cavity to generate a downward force on the mounting sleeve, so that the threaded connection between the mounting sleeve and the connecting rod is in an interference fit state, and a plurality of cavities are arranged in the fixed sleeve, each cavity is provided with a pressure relief part, and sealing ring 1 and sealing ring 2 are installed in parallel between the fixed sleeve and the mounting sleeve.
[0005] Preferably, the cavity includes a pressure relief channel arranged on the side wall of the oil chamber and connected to the interior of the oil chamber, an oil outlet channel arranged on the top of the oil chamber and connected to the interior of the oil chamber, an oil storage chamber arranged above the oil outlet channel and connected to the oil, the oil storage chamber and the pressure relief channel are connected through a conveying channel, and the pressure relief part is arranged inside the pressure relief channel.
[0006] Preferably, the pressure relief part includes a sealing sphere body 1 arranged inside the pressure relief channel, and the sealing sphere body 1 is adapted to the inner wall of the pressure relief channel, wherein a connecting rod frame is also fixedly installed on the sealing sphere body 1, and a limiting sleeve is fixedly installed inside the pressure relief channel, and one end of the connecting rod frame is located inside the limiting sleeve and is slidably connected to its inner wall, and a reset spring is connected between the connecting rod frame and the inner wall of the limiting sleeve.
[0007] Preferably, the outlet end of the oil outlet channel is provided with a sealing sphere 2 adapted to its inner wall, and an annular panel is fixedly connected to the sealing sphere 2, the annular panel is located in the oil outlet channel, and a buffer spring is connected between the annular panel and the inner wall of the oil outlet channel, and a connecting shaft is also fixedly installed on the annular panel.
[0008] Preferably, a sliding shaft is symmetrically installed on the annular panel, and an annular groove and a vertical groove connected to the annular groove are provided on the inner wall of the oil outlet channel, wherein the sliding shaft slides in the annular groove and the vertical groove, and an electromagnetic component is fixedly installed on the inner wall of the end of the limiting sleeve, wherein the end of the connecting rod frame is a magnetic end, and the electromagnetic component generates a repulsive force on the magnetic end of the connecting rod frame when energized.
[0009] Preferably, a supporting sleeve is fixedly installed inside the fixed sleeve, a sliding sleeve is installed inside the supporting sleeve, and the sliding sleeve is slidably connected to the inner wall of the supporting sleeve, one end of the sliding sleeve is located in the oil outlet channel, wherein the end of the connecting shaft is located inside the sliding sleeve, a sealing plate frame adapted to the inner wall thereof is provided in the oil outlet channel, and the sealing plate frame is fixedly installed on the outer wall of the sliding sleeve, and an electromagnet body is fixedly installed on the inner wall at the top of the supporting sleeve, a magnetic panel is fixedly installed on one end of the sliding sleeve located inside the supporting sleeve, and when the electromagnet body is energized, a repulsive force is generated on the magnetic panel, and a spring body is connected between the magnetic panel and the inner wall of the supporting sleeve.
[0010] Preferably, the inner wall of the sliding sleeve is symmetrically provided with an arc-shaped groove body and a sliding groove body, and a circular shaft body that slides within the arc-shaped groove body and the sliding groove body is symmetrically installed on the connecting shaft body, and a constant force spring is fixedly installed on the inner wall of the top of the sliding sleeve, and a plurality of action rod frames are also fixedly installed on the connecting shaft body.
[0011] Preferably, the sealing plate frame is equipped with a plurality of rolling balls rotatably connected to its inner wall, and through holes are provided on the rolling balls. An extension shaft is also installed on the rolling balls, one end of which passes through the inner wall of the sealing plate frame and extends to the interior of the sliding sleeve. A torsion spring is connected between the extension shaft and the inner wall of the sealing plate frame, and a force-bearing rod frame is fixedly installed on one end of the extension shaft located inside the sliding sleeve, and the force-bearing rod frame is located on the motion trajectory of the action rod frame.
[0012] Preferably, a bracket is fixedly mounted on the end of the mounting sleeve, and two sensing elements are fixedly mounted on the bracket, one of the sensing elements is in contact with the end of the connecting rod, and the other sensing element is not in contact with the end of the connecting rod.
[0013] Preferably, the inner wall apertures of the pressure relief channel and the oil outlet channel are both larger than the end apertures.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can control the mounting sleeve to have a tendency to move downward by injecting hydraulic oil into the oil chamber, so that the threaded connection between the mounting sleeve and the connecting rod is in an interference fit state, and the interference fit between the mounting sleeve and the connecting rod makes the connection between the connecting rod and the slider tighter, thereby avoiding the gap between the connecting rod and the slider during the stamping process, thereby effectively reducing noise, improving the accuracy of the punch press, and avoiding the slider from making unnecessary travel; 2. The present invention buffers the force exerted by the hydraulic oil by the movement of the sealing ball 1 in the pressure relief channel. The sealing ball 1 is subjected to the force and moves toward the limit sleeve. During the movement, the connecting rod frame squeezes the reset spring, and the sealing ball 1 exposes the delivery channel. The hydraulic oil is then delivered to the delivery channel under the action of pressure, and is delivered to the oil storage chamber through the trajectory of the delivery channel, thereby effectively avoiding the situation where the interference is too large. 3. The present invention utilizes the sealing plate frame, the rolling ball thereon and the through hole to allow the hydraulic oil in the oil storage chamber to enter the oil outlet channel, and under the action of the sealing ball 2, the hydraulic oil in the oil outlet channel enters the oil chamber, and the hydraulic oil is refilled in the oil chamber through the squeezing force of the sealing plate frame, and the leaked hydraulic oil is blocked by the sealing ring 2, thereby effectively applying a force to the mounting sleeve, so that the threaded connection between the mounting sleeve and the connecting rod is still in an interference fit state. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the slider of the present invention; Figure 4 It is a schematic diagram of the separation of the connecting part and the connecting rod structure of the present invention; Figure 5 It is a front view schematic diagram of the connecting part and connecting rod structure of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure of the area B in the middle; Figure 7 This is a schematic diagram of the structure of the connecting shaft and the sliding sleeve of the present invention; Figure 8 It is a schematic diagram of the separation of the sliding sleeve, the connecting shaft and the sealing plate frame structure of the present invention; Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structure of the area C in the middle; Fig.10 This is a schematic diagram of the cavity structure of the present invention; Fig.11 It is a schematic diagram of the structure of the bracket and the sensing element of the present invention.
[0016] In the figure: 1, frame; 2, power transmission mechanism; 3, crankshaft mechanism; 4, connecting rod; 5, slider; 6, connecting part; 61, fixing sleeve; 62, mounting sleeve; 63, oil chamber; 64, cavity; 641, pressure relief channel; 642, oil outlet channel; 643, oil storage chamber; 644, conveying channel; 645, annular groove body; 646, vertical groove body; 65, pressure relief part; 651, sealing ball 1; 652, connecting rod frame; 653, limiting sleeve; 654, reset spring; 655, electromagnetic assembly; 66, sealing ring 1; 67, sealing Circle 2; 68, sealing sphere 2; 681, annular panel; 682, buffer spring; 683, connecting shaft; 684, sliding shaft; 685, circular shaft; 686, action rod frame; 7, supporting sleeve; 71, sliding sleeve; 711, arc-shaped groove; 712, sliding groove; 72, sealing plate frame; 73, electromagnet body; 74, magnetic panel; 75, spring body; 76, constant force spring; 8, rolling sphere; 81, through hole; 82, extension shaft; 83, torsion spring; 84, force rod frame; 9, bracket; 91, induction element. DETAILED DESCRIPTION
[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0018] See also Figure 1-11 The present invention provides a technical solution: a high-precision and low-noise punching machine. The present invention makes corresponding improvements to the technical problems in the background technology, including a frame 1, a power transmission mechanism 2 arranged inside the frame 1, and the power transmission mechanism 2 includes a series of power transmission elements such as a motor, a flywheel, and a gear. Since the power transmission mechanism 2 is a prior art component, the present invention does not give too much redundant description thereof, and a crankshaft mechanism 3 is also installed on the power transmission mechanism 2, and a connecting rod 4 is rotatably installed on the crankshaft mechanism 3, a slider 5 is installed inside the frame 1, and a lower die fixedly installed on the frame 1 is also arranged below the slider 5, and a connecting portion 6 connected to the connecting rod 4 is arranged inside the slider 5; when the power transmission mechanism 2 is started, it drives the crankshaft mechanism 3 to rotate, and the crankshaft mechanism 3 drives the slider 5 to reciprocate through the connecting portion 6 through the connecting rod 4. If a workpiece is placed on the lower die, the workpiece will be punched by the reciprocating slider 5; Combined with Figure 3As shown, as a further limitation of the present invention, the connecting portion 6 includes a fixed sleeve 61 fixedly installed inside the slider 5, and a plurality of mounting sleeves 62 are installed in parallel inside the fixed sleeve 61, each mounting sleeve 62 is threadedly connected to the connecting rod 4, one of the mounting sleeves 62 (the mounting sleeve 62 close to the bottom end of the connecting rod 4) forms an oil chamber 63 with the fixed sleeve 61, and hydraulic oil is injected into the oil chamber 63 to generate a downward force on the mounting sleeve 62, so that the threaded connection between the mounting sleeve 62 and the connecting rod 4 is in an interference fit state, and the fixed sleeve 61 and the mounting sleeve 62 are in an interference fit state. A sealing ring 1 66 and a sealing ring 2 67 are installed in parallel between the sleeves 62. When the oil chamber 63 is filled with hydraulic oil, the hydraulic oil can make the installation sleeve 62 have a tendency to move downward, so that the threaded connection between the installation sleeve 62 and the connecting rod 4 is in an interference fit state. The interference fit between the installation sleeve 62 and the connecting rod 4 makes the connection between the connecting rod 4 and the slider 5 more tightly connected, thereby avoiding a gap between the connecting rod 4 and the slider 5 during the stamping process, thereby effectively reducing noise, improving the accuracy of the punch press, and avoiding the slider 5 from making unnecessary strokes. However, in the actual working process, although the interference fit can avoid the noise phenomenon, it is impossible to effectively judge the interference between the installation sleeve 62 and the connecting rod 4 during the filling of hydraulic oil. The interference directly affects the tightness of the fit and the stress state. If the interference is too small, the fit may not be tight and leakage may occur. If the interference is too large, excessive stress may be generated, resulting in indentations, cracks and other damages in the connection area between the installation sleeve 62 and the connecting rod 4. In view of this, the present invention is designed as follows: Combined with Figure 4 and attached Figure 5 As shown, a plurality of cavities 64 are provided in the fixed sleeve 61, each cavity 64 includes a pressure relief passage 641 provided on the side wall of the oil chamber 63 and communicating with the inside of the oil chamber 63, an oil outlet passage 642 provided on the top of the oil chamber 63 and communicating with the inside of the oil chamber 63, an oil storage chamber 643 provided above the oil outlet passage 642 and communicating with the oil storage chamber 643, the oil storage chamber 643 and the pressure relief passage 641 are communicated through a delivery passage 644, and the oil storage chamber 643 and the pressure relief passage 641 are communicated with each other through a delivery passage 644. Fig.10As shown, the inner wall apertures of the pressure relief channel 641 and the oil outlet channel 642 are larger than the end apertures, wherein a pressure relief portion 65 is disposed inside the pressure relief channel 641. As a further limitation in the present invention, the pressure relief portion 65 includes a sealing ball 651 disposed inside the pressure relief channel 641, the sealing ball 651 is located at the intersection of the inside of the pressure relief channel 641 and the end, and the aperture of the inner wall of the pressure relief channel 641 is larger than the end aperture, and thus the sealing ball 651 can only move toward the inside of the pressure relief channel 641, and cannot move toward the end direction of the pressure relief channel 641, and the sealing ball 651 and the pressure relief channel are connected. 641 inner wall adaptation, wherein the sealing sphere 651 is also fixedly mounted with a connecting rod frame 652, and a limiting sleeve 653 is fixed inside the pressure relief channel 641. It should be noted that one end of the connecting rod frame 652 close to the limiting sleeve 653 is a magnetic end, and one end of the connecting rod frame 652 is located inside the limiting sleeve 653 and is slidably connected to its inner wall, a return spring 654 is connected between the connecting rod frame 652 and the inner wall of the limiting sleeve 653, an electromagnetic component 655 is fixedly mounted on the inner wall of the end of the limiting sleeve 653, and the electromagnetic component 655 generates a repulsive force on the magnetic end of the connecting rod frame 652 when it is energized; In order to effectively monitor whether there is a micro-motion between the connecting rod 4 and the mounting sleeve 62, the present invention is fixedly mounted with a bracket 9 at the end of the mounting sleeve 62, and two sensing elements 91 are fixedly mounted on the bracket 9, one of the sensing elements 91 is in contact with the end of the connecting rod 4, and the other sensing element 91 is not in contact with the end of the connecting rod 4. When both sensing elements 91 are pressed or not triggered, it indicates that there is a micro-motion between the connecting rod 4 and the mounting sleeve 62. Specifically, follow the above, combined with the attached Figure 6 As shown, after the hydraulic oil fills the entire oil chamber 63, the hydraulic oil continues to be delivered. Since the hydraulic oil cannot be compressed, the hydraulic oil will exert a force on the sealing ball 651, so that the sealing ball 651 is subjected to the force and moves toward the direction of the limiting sleeve 653. During the movement, the connecting rod frame 652 squeezes the return spring 654, and the sealing ball 651 exposes the delivery channel 644, so that the hydraulic oil is delivered to the delivery channel 644 under the action of pressure, and is delivered to the oil storage chamber 643 through the trajectory of the delivery channel 644, thereby effectively avoiding the situation where the interference is too large; As the stamping work proceeds, the pressure exerted by the hydraulic oil on the seal ring 1 66 can easily cause damage or failure of the seal ring 66. Therefore, the present invention sets a seal ring 2 67 below the seal ring 66. The double-layer seal ring can effectively prevent the hydraulic oil from leaking into the interior of the slider. However, the hydraulic oil in the oil chamber 63 is still in short supply. In order to replenish the hydraulic oil in the oil chamber 63, the present invention makes the following design: a seal ball 2 68 adapted to the inner wall of the oil outlet channel 642 is set at the outlet end of the oil outlet channel 642. Under normal conditions (i.e., the oil chamber 63 is full of hydraulic oil), the seal ball 2 68 is located at the outlet end of the oil outlet channel 642, and a ring panel 681 is fixedly connected to the seal ball 2 68. The ring panel 681 is located at the outlet end of the oil outlet channel 642. 42, and a buffer spring 682 is connected between the annular panel 681 and the inner wall of the oil outlet channel 642, and a connecting shaft 683 is fixedly installed on the annular panel 681, and a sliding shaft 684 is symmetrically installed on the annular panel 681, and an annular groove 645 and a vertical groove 646 connected to the annular groove 645 are provided on the inner wall of the oil outlet channel 642, wherein the sliding shaft 684 slides within the annular groove 645 and the vertical groove 646, wherein a support sleeve 7 is fixedly installed inside the fixed sleeve 61, and a sliding sleeve 71 is installed inside the support sleeve 7, and the sliding sleeve 71 is slidably connected to the inner wall of the support sleeve 7, and one end of the sliding sleeve 71 is located in the oil outlet channel 642, wherein the end of the connecting shaft 683 is connected to the inner wall of the support sleeve 7, and the sliding sleeve 71 is connected to the inner wall of the support sleeve 7. The oil outlet channel 642 is provided with a sealing plate frame 72 adapted to the inner wall thereof, and the sealing plate frame 72 is fixedly mounted on the outer wall of the sliding sleeve 71, and an electromagnet body 73 is fixedly mounted on the inner wall at the top of the supporting sleeve 7, and a magnetic panel 74 is fixedly mounted on one end of the sliding sleeve 71 located inside the supporting sleeve 7, and the electromagnet body 73 generates a repulsive force on the magnetic panel 74 when energized, and a spring body 75 is connected between the magnetic panel 74 and the inner wall of the supporting sleeve 7, and an arcuate groove body 711 and a sliding groove body 712 are symmetrically arranged on the inner wall of the sliding sleeve 71, and a circular shaft body 685 that slides in the arcuate groove body 711 and the sliding groove body 712 is symmetrically mounted on the connecting shaft body 683 ... A constant force spring 76 is fixedly installed on the inner wall of the top of the sliding sleeve 71. It should be noted that the connecting shaft 683 is located below the constant force spring 76, and a plurality of action rod frames 686 are also fixedly installed on the connecting shaft 683, wherein a plurality of rolling balls 8 rotatably connected to the inner wall of the sealing plate frame 72 are installed on the sealing plate frame 72, and a through hole 81 is opened on the rolling ball 8, and an extension shaft 82 is also installed on the rolling ball 8, one end of the extension shaft 82 passes through the inner wall of the sealing plate frame 72 and extends to the inside of the sliding sleeve 71, a torsion spring 83 is connected between the extension shaft 82 and the inner wall of the sealing plate frame 72, and a force rod frame 84 is fixedly installed on one end of the extension shaft 82 located inside the sliding sleeve 71, and the force rod frame 84 is located on the movement trajectory of the action rod frame 686; Specifically, follow the above, combined with the attached Figure 6As shown, in a normal state, the oil chamber 63 is not filled with hydraulic oil. At this time, the sealing ball 68 is located at the outlet end of the oil outlet channel 642, and the sliding shaft 684 on the annular panel 681 (connected to the sealing ball) is located in the annular groove 645; the staff fills the oil chamber 63 with hydraulic oil. When the oil chamber 63 is filled, the hydraulic oil will give downward pressure to the mounting sleeve 62, thereby making the mounting sleeve 62 and the connecting rod 4 in an interference fit state. In order to avoid damage between the connecting rod 4 and the mounting sleeve 62 caused by excessive interference, the excess hydraulic oil will exert a force on the sealing ball 651, so that the sealing ball 651 moves in the direction of the limiting sleeve 653 to expose the delivery channel 644, and then the hydraulic oil is delivered to the delivery channel 644 under the action of pressure, and is delivered to the oil storage chamber 643 through the trajectory of the delivery channel 644. Figure 7-9 As shown, in this state, since the through hole 81 on the rolling ball 8 is not connected with the oil storage chamber 643 and the oil outlet channel 642, the hydraulic oil will be stored in the oil storage chamber 643, and the oil outlet channel 642 does not contain hydraulic oil. When the hydraulic oil reaches a certain amount, the electromagnet body 73 on the inner wall of the top of the support sleeve 7 can be controlled to be energized, so that the electromagnet body 73 generates a repulsive force on the magnetic panel 74, and then the magnetic panel 74 drives the sliding sleeve 71 to move downward. During the descent of the sliding sleeve 71, the sealing plate frame 72 on the outer wall thereof moves synchronously with it (combined with the attached Figure 7 As shown in the figure, the arc groove 711 on the inner wall of the sliding sleeve 71 applies a force to the circular shaft 685, so that the connecting shaft 683 is adjusted in angle. During the angle adjustment process of the connecting shaft 683, the annular panel 681 thereon moves synchronously with it, that is, the sliding shaft 684 on the outer wall of the annular panel 681 moves along the track of the annular groove 645 to the vertical groove 646. At the same time, the electromagnetic assembly 655 located in the pressure relief channel 641 is energized to adjust the connecting rod frame 65 2 generates a repulsive force, the connecting rod frame 652 drives the sealing ball 1 651 to move toward the outlet end of the pressure relief channel 641, and the hydraulic oil in the oil chamber 63 acts on the sealing ball 2 68, and the sealing ball 2 68 is moved into the oil outlet channel 642 by the force, and then the sliding shaft 684 on the annular panel 681 adjusts its position in the vertical groove 646. At this time, the hydraulic oil in the oil chamber 63 is in a balanced state and exerts downward pressure on the mounting sleeve 62; It should be noted that the length of the action rod frame 686 in the present invention is greater than that of the force rod frame 84. When the sliding sleeve 71 moves downward, the sealing plate frame 72 on the outer wall of the sliding sleeve 71 and its internal components all move downward synchronously therewith. During the process of the force rod frame 84 descending with the sealing plate frame 72, it is still located on the rotation trajectory of the action rod frame 686. In this process, the action rod frame 686 will rotate with the connecting shaft 683. During the rotation of the action rod frame 686, a force is applied to the force rod frame 84, so that the force rod frame 84 drives the extension shaft 82 to rotate. Under the action of the extension shaft 82, the rolling ball 8 rotates, and the through hole 81 on the rolling ball 8 is exposed to the oil storage chamber 643 and the oil outlet channel 642, that is, the hydraulic oil in the oil storage chamber 643 is transported to the oil outlet channel 642. At this time, the hydraulic channel and the oil outlet channel 642 are both sealed by the sealing ball 1 651 and the sealing ball 2 68. When the sealing ring 66 is damaged and oil leakage occurs, the current flowing into the electromagnet body 73 is increased, that is, the magnetic force of the electromagnet body 73 is increased, and the magnetic panel 74 continues to descend under the action of the electromagnet body 73, and the sliding sleeve 71 moves synchronously with it. At this time, the constant force spring 76 is close to the connecting shaft 683, and the force-bearing rod frame 84 leaves the movement trajectory of the action rod frame 686, and under the action of the deformed torsion spring 83, the extension shaft 82 drives the force-bearing rod frame 84 and the rolling ball 8 to return to the initial state, that is, the sealing plate frame 72 isolates the oil outlet channel 642 and the oil storage chamber 643. During the descent of the sliding sleeve 71, the constant force spring 76 contacts the force-bearing shaft. When the force-bearing rod frame 84 is not on the rotation trajectory of the action rod frame 686, the constant force spring 76 contacts the connecting shaft 683, and then the sliding sleeve 71 When the sliding sleeve 71 is descending, the sealing plate frame 72 acts on the hydraulic oil in the oil outlet channel 642, so that the hydraulic oil applies a force to the sealing ball 68. At the same time, the constant force spring 76 applies a force to the connecting shaft 683 under the action of the sliding sleeve 71. The connecting shaft 683 causes the sealing ball 68 to descend through the annular panel 681, that is, the sealing ball 68 leaves the outlet end of the oil outlet channel 642 and moves into the oil chamber 63. At this time, the oil chamber 63 is connected with the inside of the oil outlet channel 642. Under the action of the sealing plate frame 72, the hydraulic oil refills the oil chamber 63, and the leaked hydraulic oil is blocked by the sealing ring 67, thereby effectively applying a force to the mounting sleeve 62, so that the threaded connection between the mounting sleeve 62 and the connecting rod 4 is still in an interference fit state.
[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-precision, low-noise punch press, characterized in that: The invention comprises a frame (1), a power transmission mechanism (2) arranged inside the frame (1), a crankshaft mechanism (3) being further mounted on the power transmission mechanism (2), and a connecting rod (4) being rotatably mounted on the crankshaft mechanism (3), a slider (5) being mounted inside the frame (1), and a connecting portion (6) being arranged inside the slider (5) and connected to the connecting rod (4); the connecting portion (6) comprising a fixed sleeve (61) fixedly mounted inside the slider (5), and a plurality of mounting sleeves (62) being mounted in parallel inside the fixed sleeve (61), and each mounting sleeve (62) being connected to the connecting rod (4). The rod (4) is threadedly connected, wherein an oil chamber (63) is formed inside a mounting sleeve (62) and a fixed sleeve (61), and hydraulic oil is injected into the oil chamber (63) to generate a downward force on the mounting sleeve (62), so that the threaded connection between the mounting sleeve (62) and the connecting rod (4) is in an interference fit state, and a plurality of cavities (64) are arranged in the fixed sleeve (61), and a pressure relief portion (65) is arranged in each cavity (64), and a sealing ring 1 (66) and a sealing ring 2 (67) are installed in parallel between the fixed sleeve (61) and the mounting sleeve (62).
2. A high-precision, low-noise punching machine according to claim 1, characterized in that: The cavity (64) comprises a pressure relief passage (641) arranged on a side wall of the oil chamber (63) and connected to the interior of the oil chamber (63), an oil outlet passage (642) arranged on the top of the oil chamber (63) and connected to the interior of the oil chamber (63), and an oil storage chamber (643) arranged above the oil outlet passage (642) and connected to the oil outlet passage. The oil storage chamber (643) is connected to the pressure relief passage (641) via a delivery passage (644), and the pressure relief portion (65) is arranged inside the pressure relief passage (641).
3. A high-precision, low-noise punching machine according to claim 2, characterized in that: The pressure relief portion (65) includes a sealing sphere (651) disposed inside the pressure relief channel (641), and the sealing sphere (651) is adapted to the inner wall of the pressure relief channel (641), wherein a connecting rod frame (652) is fixedly mounted on the sealing sphere (651), and a limiting sleeve (653) is fixedly mounted inside the pressure relief channel (641), and one end of the connecting rod frame (652) is located inside the limiting sleeve (653) and is slidably connected to the inner wall thereof, and a return spring (654) is connected between the connecting rod frame (652) and the inner wall of the limiting sleeve (653).
4. A high-precision, low-noise punching machine according to claim 3, characterized in that: The outlet end of the oil outlet channel (642) is provided with a sealing sphere (68) adapted to the inner wall thereof, and an annular panel (681) is fixedly connected to the sealing sphere (68). The annular panel (681) is located in the oil outlet channel (642), and a buffer spring (682) is connected between the annular panel (681) and the inner wall of the oil outlet channel (642), and a connecting shaft (683) is fixedly mounted on the annular panel (681).
5. A high-precision, low-noise punching machine according to claim 4, characterized in that: A sliding shaft (684) is symmetrically mounted on the annular panel (681), and an annular groove (645) and a vertical groove (646) connected to the annular groove (645) are arranged on the inner wall of the oil outlet channel (642), wherein the sliding shaft (684) slides in the annular groove (645) and the vertical groove (646) in a limited manner, and an electromagnetic component (655) is fixedly mounted on the inner wall of the end of the limiting sleeve (653), wherein the end of the connecting rod frame (652) is a magnetic end, and when the electromagnetic component (655) is energized, a repulsive force is generated on the magnetic end of the connecting rod frame (652).
6. A high-precision, low-noise punching machine according to claim 4, characterized in that: A support sleeve (7) is fixedly installed inside the fixed sleeve (61), a sliding sleeve (71) is installed inside the support sleeve (7), and the sliding sleeve (71) is slidably connected to the inner wall of the support sleeve (7), one end of the sliding sleeve (71) is located in the oil outlet channel (642), wherein the end of the connecting shaft (683) is located inside the sliding sleeve (71), a sealing plate frame (72) adapted to the inner wall of the oil outlet channel (642) is provided, and the sealing plate frame (72) is fixedly installed on the outer wall of the sliding sleeve (71), and an electromagnet body (73) is fixedly installed on the inner wall of the top of the support sleeve (7), and a magnetic panel (74) is fixedly installed on one end of the sliding sleeve (71) located inside the support sleeve (7), and the electromagnet body (73) generates a repulsive force on the magnetic panel (74) when energized, and a spring body (75) is connected between the magnetic panel (74) and the inner wall of the support sleeve (7).
7. A high-precision, low-noise punching machine according to claim 6, characterized in that: The inner wall of the sliding sleeve (71) is symmetrically provided with an arc-shaped groove body (711) and a sliding groove body (712), and a circular shaft body (685) is symmetrically installed on the connecting shaft body (683) and slides within the arc-shaped groove body (711) and the sliding groove body (712). A constant force spring (76) is fixedly installed on the inner wall of the top of the sliding sleeve (71), and a plurality of action rod frames (686) are also fixedly installed on the connecting shaft body (683).
8. A high-precision, low-noise punching machine according to claim 7, characterized in that: A plurality of rolling balls (8) rotatably connected to the inner wall of the sealing plate frame (72) are mounted on the sealing plate frame (72), and a through hole (81) is formed on the rolling balls (8). An extension shaft (82) is also mounted on the rolling balls (8), one end of the extension shaft (82) passes through the inner wall of the sealing plate frame (72) and extends into the interior of the sliding sleeve (71), a torsion spring (83) is connected between the extension shaft (82) and the inner wall of the sealing plate frame (72), and a force-bearing rod frame (84) is fixedly mounted on one end of the extension shaft (82) located inside the sliding sleeve (71), and the force-bearing rod frame (84) is located on the motion track of the action rod frame (686).
9. A high-precision, low-noise punching machine according to claim 1, characterized in that: A bracket (9) is fixedly mounted on the end of the mounting sleeve (62), and two sensing elements (91) are fixedly mounted on the bracket (9), wherein one of the sensing elements (91) contacts the end of the connecting rod (4), and the other sensing element (91) does not contact the end of the connecting rod (4).
10. A high-precision, low-noise punching machine according to claim 2, characterized in that: The inner wall apertures of the pressure relief channel (641) and the oil outlet channel (642) are both larger than the end apertures.