Multi-link high-reliability tensioning mechanism
By employing a multi-stage, highly reliable tensioning mechanism, and utilizing a combination of primary and secondary positioning mechanisms, a hydraulic motor, and a clamping cylinder, the problem of unstable tool fixation is solved, resulting in higher machining accuracy and longer tool life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QI ZHONG SHU KONG ZHUANG BEI GU FEN YOU XIAN GONG SI
- Filing Date
- 2023-12-27
- Publication Date
- 2026-05-22
AI Technical Summary
The existing methods of fixing the cutting tool and the tool plate have poor stability and are difficult to meet the requirements of machining for accuracy and lifespan.
The system employs a multi-stage, highly reliable tensioning mechanism, including the cutting tool, blade, primary positioning mechanism, secondary positioning mechanism, adjusting pad, primary tensioning mechanism, and secondary tensioning mechanism. Through the dual protection of two sets of guide positioning mechanisms, hydraulic motors, and clamping cylinders, the stability and reliability of the cutting tool during the machining process are ensured.
It improves the matching accuracy and stability of the cutting tool and the cutting plate, extends the service life of the cutting tool, and ensures the safety and accuracy of the machining process.
Smart Images
Figure CN117644408B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a multi-stage, highly reliable tensioning mechanism, belonging to the technical field of tool tensioning mechanisms. Background Technology
[0002] Currently, the tool body and the tool plate are mostly fixed by manual or electric tensioning using lead screws. While the tensioning method is simple, the stability of the tool body after fixing is relatively poor. With the development of the machinery industry, the requirements for the tool tensioning mechanism during machine tool cutting are increasing in terms of the precision, stability, and tool life of the machined parts. How to improve the stability of the tool body fixing has become an important research topic in the industry. Summary of the Invention
[0003] To address the shortcomings of the existing technology, this invention provides a multi-stage, highly reliable tensioning mechanism that makes tool processing more stable, reliable, and safe.
[0004] The technical solution adopted by this invention to solve its technical problem is: a multi-stage high-reliability tensioning mechanism, including a blade body, a blade plate, a primary positioning mechanism, a secondary positioning mechanism, an adjusting pad, a primary tensioning mechanism, and a secondary tensioning mechanism. The blade plate has a sloping groove at its front end that mates with the blade body, and the tail end of the blade body can be completely embedded in the sloping groove. An adjusting pad is provided between the bottom surface of the blade body and the bottom surface of the groove in the blade plate. A primary positioning mechanism is provided between the contacting sloping surfaces of the blade plate and the blade body. A secondary positioning mechanism is provided between the bottom surface of the blade body and the adjusting pad. When the blade body enters the blade plate, a primary tensioning mechanism connected to the blade body is provided inside the blade plate. A secondary tensioning mechanism is provided between the blade body and the adjusting pad. After the blade body is guided into the blade plate by the primary positioning mechanism, the primary tensioning mechanism tensions the blade body, causing its bottom surface to contact the adjusting pad, and simultaneously it is positioned by the secondary positioning mechanism. After the blade body is positioned by the secondary positioning mechanism, the secondary tensioning mechanism starts working, tensioning the blade body a second time.
[0005] The beneficial effects of this invention are: by using two sets of guiding and positioning mechanisms, the matching accuracy between the tool body and the tool plate is improved, and the stability and reliability of the tool body is improved. The use of hydraulic motors and clamping cylinders for tensioning provides dual protection. If one tensioning action fails, the other will continue to work, making the tool body and the tool plate form an integral whole, making the tool body more stable, reliable and safe during processing, improving processing accuracy while increasing the service life of the tool. Attached Figure Description
[0006] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0007] Figure 1 This is a schematic diagram of the structure of the present invention.
[0008] Numbering on the map:
[0009] 1. Blade body, 2. Long positioning key, 3. Double-ended threaded rivet, 4. Positioning key, 5. Pull rod, 6. Rivet, 7. Signal switch, 8. Clamping cylinder, 9. Blade plate, 10. Gearbox, 11. Hydraulic motor, 12. Tensioning oil pipe, 13. Relaxing oil pipe, 14. Bearing, 15. Adjusting block. Detailed Implementation
[0010] like Figure 1 As shown, a multi-stage high-reliability tensioning mechanism includes a blade body 1, a blade plate 9, a primary positioning mechanism, a secondary positioning mechanism, an adjusting pad 15, a primary tensioning mechanism, and a secondary tensioning mechanism.
[0011] The front end of the blade plate 9 has a sloping groove that mates with the blade body 1. The tail end of the blade body 1 can be completely embedded in the sloping groove. An adjusting pad 15 is provided between the bottom surface of the blade body 1 and the bottom surface of the groove in the blade plate 9. A primary positioning mechanism is provided between the contact sloping surfaces of the blade plate 9 and the blade body 1. The primary positioning mechanism consists of a long positioning key 2, a screw, and a pin. Keyways are provided on the two sloping surfaces of the blade plate 9. The long positioning key 2 is installed in the keyway of the blade plate 9 by screws and pins. Keyways are provided on the two sloping surfaces of the blade body 1 that mate with the long positioning key 2. When the blade body 1 enters the blade plate 9, primary positioning is achieved through the cooperation of the keyways and the long positioning key 2.
[0012] A secondary positioning mechanism is provided between the bottom surface of the blade body 1 and the adjusting pad 15. The secondary positioning mechanism consists of a positioning key 4, screws and pins. The positioning key 4 is installed on the top surface of the adjusting pad 15 by screws and pins. A keyway that mates with the positioning key 4 is provided on the bottom surface of the blade body 1. The positioning key 4 is entered through the keyway on the bottom surface of the blade body 1 to achieve secondary positioning.
[0013] When the cutter body 1 enters the cutter plate 9, the cutter plate 9 is equipped with a primary tensioning mechanism connected to the cutter body 1. The primary tensioning mechanism includes a double-headed threaded rivet 3, a pull rod 5, a clamping cylinder 8, a gearbox 10, a hydraulic motor 11, and a bearing 14. The cutter plate 9 is equipped with a pull rod 5 that passes through the adjusting pad 15 and is inserted into the inclined groove. The rear end of the pull rod 5 is connected to a reducer 10 fixed on the cutter plate 9. The reducer 10 is driven by the hydraulic motor 11. A flange is provided on the rear side wall of the pull rod 5. Bearings 14 are provided at both the upper and lower ends of the flange. The bearings 14 are fixed in the cutter plate 9 to restrict its forward and backward movement. A double-headed threaded rivet 3 is screwed into the bottom of the cutter body 1. A threaded hole is opened at the end of the pull rod 5 to cooperate with the double-headed threaded rivet 3. When the double-headed threaded rivet 3 contacts the pull rod 5, the hydraulic motor 11 can drive the pull rod 5 to rotate, so that the cutter body 1 is tensioned in place.
[0014] A two-stage tensioning mechanism is provided between the blade body 1 and the adjusting pad 15. The two-stage tensioning mechanism includes a pull pin 6, a signal switch 7, and a clamping cylinder 8. The bottom surface of the blade body 1 is provided with a pull pin 6. The adjusting pad 5 is provided with a clamping cylinder 8 embedded in the blade plate 1. The cylinder rod of the clamping cylinder 8 extends from the upper and lower ends of its cylinder body. The upper end passes through the adjusting pad 5 and is provided with a pull claw connected to the pull pin 6. The lower end of the clamping cylinder 8 is inserted into the blade plate 9. The blade plate 9 is provided with a signal switch 7 triggered by the lower pull rod after the clamping cylinder 8 is tightened to the position. The blade plate 9 is provided with a tensioning oil passage 12 and a relaxation oil passage 13 that are connected to the clamping cylinder 8.
[0015] After the blade body 1 is guided into the blade plate 9 by the primary positioning mechanism, the primary tensioning mechanism tensions the blade body 1 so that its bottom surface contacts the adjusting pad 15. At the same time, it is positioned by the secondary positioning mechanism. After the blade body 1 is positioned by the secondary positioning mechanism, the secondary tensioning mechanism starts to work and tensions the blade body 1 a second time.
[0016] Installation steps:
[0017] Install the two long locating keys 2 into the two beveled keyways of the cutter plate 9 using screws and pins. Grind the two beveled keyways of the tool body 1 to ensure flexible sliding with the two sides of the long locating keys 2, and ensure that the contact area between the tool body 1 and the two beveled surfaces of the cutter plate 9 is not less than 85%.
[0018] Install the adjusting block 15 on the blade plate 9, and attach the positioning key 4 to the adjusting block 15.
[0019] Double-headed threaded rivets 3 and rivets 6 are screwed into the cutter body 1, and the pull rod 5, signal switch 7 and clamping cylinder 8 are installed into the cutter plate 9.
[0020] The reducer 10 presses the bearing 14 and installs the blade plate 9. The hydraulic motor 11 is then attached to the reducer 10. The oil pipe 12 is tightened and the oil pipe 13 is loosened to connect to the oil supply system.
[0021] Working principle:
[0022] During the tightening process, the oil pipe 13 is in the oil supply state and the clamping cylinder 8 is about to open.
[0023] Push the cutter body 1 into the two inclined surfaces of the cutter plate 9. The long positioning keys 2 on both sides play a positioning and sliding guiding role. When the double-headed threaded rivet 3 contacts the pull rod 5, the hydraulic motor 11 starts to rotate and drives the pull rod 5 to tighten the double-headed threaded rivet 3 until it contacts the adjusting block 15, which means it is tightened in place.
[0024] Positioning key 4 also serves as a positioning function. After tightening to the desired position, hydraulic motor 11 stops working, and oil from tightening oil pipe 12 closes the claws of clamping cylinder 8, gripping the pull pin 6 firmly. Signal switch 7 receives the signal, indicating that the entire tool body 1 is tightened.
Claims
1. A multi-stage, high-reliability tensioning mechanism, characterized in that: The device includes a cutter body (1), a cutter plate (9), a primary positioning mechanism, a secondary positioning mechanism, an adjusting pad (15), a primary tensioning mechanism, and a secondary tensioning mechanism. The front end of the cutter plate (9) has a sloping groove that mates with the cutter body (1). The tail end of the cutter body (1) can be completely embedded in the sloping groove. An adjusting pad (15) is provided between the bottom surface of the cutter body (1) and the bottom surface of the groove in the cutter plate (9). A primary positioning mechanism is provided between the contact sloping surfaces of the cutter plate (9) and the cutter body (1). A secondary positioning mechanism is provided between the bottom surface of the cutter body (1) and the adjusting pad (15). When the cutter body (1) enters the cutter plate (9), a primary tensioning mechanism is provided inside the cutter plate (9) that is connected to the cutter body (1). The clamping mechanism has a secondary clamping mechanism between the cutter body (1) and the adjusting pad (15). After the cutter body (1) is guided into the cutter plate (9) by the primary positioning mechanism, the primary clamping mechanism clamps the cutter body (1) so that its bottom surface contacts the adjusting pad (15) and is simultaneously positioned by the secondary positioning mechanism. After the cutter body (1) is positioned by the secondary positioning mechanism, the secondary clamping mechanism starts to work and clamps the cutter body (1) a second time. The primary positioning mechanism consists of a long positioning key (2), screws and pins. Keyways are provided on the two inclined surfaces of the cutter plate (9). The long positioning key (2) is installed in the keyway of the cutter plate (9) by screws and pins. Keyways are provided on the two inclined surfaces of the cutter body (1) to connect with the long positioning key (2). The key (2) has a keyway that engages with the tool body (1) and enters the tool plate (9). The first-level positioning is achieved by engaging the keyway with the long positioning key (2). The second-level positioning mechanism consists of a positioning key (4), screws and pins. The positioning key (4) is installed on the top surface of the adjusting pad (15) by screws and pins. A keyway that engages with the positioning key (4) is provided on the bottom surface of the tool body (1). The positioning key (4) is entered through the keyway on the bottom surface of the tool body (1) to achieve the second-level positioning. The first-level tensioning mechanism includes a double-headed threaded rivet (3), a pull rod (5), a gearbox (10), a hydraulic motor (11) and a bearing (14). The tool plate (9) has a keyway that passes through the adjusting pad (15) and inserts into it. The pull rod (5) is inserted into the inclined sinker. The rear end of the pull rod (5) is connected to the reducer (10) fixed on the cutter plate (9). The reducer (10) is driven by the hydraulic motor (11). The rear end side wall of the pull rod (5) is provided with a flange. The upper and lower ends of the flange are provided with bearings (14). The bearings (14) are fixed in the cutter plate (9) to restrict its forward and backward movement. A double-headed threaded rivet (3) is screwed into the bottom of the cutter body (1). The end of the pull rod (5) is provided with a threaded hole that matches the double-headed threaded rivet (3). When the double-headed threaded rivet (3) contacts the pull rod (5), the hydraulic motor (11) can drive the pull rod (5) to rotate, so that the cutter body (1) is tightened in place.The secondary tensioning mechanism includes a pull stud (6), a signal switch (7), and a clamping cylinder (8). The bottom surface of the cutter body (1) is provided with a pull stud (6). Under the adjusting pad (15), there is a clamping cylinder (8) embedded in the cutter plate (1). The cylinder rod of the clamping cylinder (8) extends from the upper and lower ends of its cylinder body, with the upper end passing through the adjusting pad (15) and having a pull claw connecting to the pull stud (6) at the upper end. The lower end of the clamping cylinder (8) is inserted into the cutter plate (9). The cutter plate (9) is provided with a signal switch (7) triggered by the lower pull rod after the clamping cylinder (8) is tightened to the correct position. A tensioning oil passage (12) and a relaxation oil passage (13) communicating with the clamping cylinder (8) are provided on the cutter plate (9).