Closed-loop gear anti-backlash structure of gear milling machining reduction gearbox
By milling teeth, the reduction in precision caused by gear transmission clearance and difficulty in disassembling the cutter plate is solved, and the effect of high-precision processing and convenient disassembly is achieved.
Patent Information
- Application Number
- CN202422509176.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-16
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-10-16
AI Technical Summary
In high-precision milling equipment, gear transmission gaps lead to reduced transmission accuracy, increased noise and system instability, while the cutting wheel is difficult to disassemble.
The gearbox closed-loop gear structure is used to process milling teeth, including end seat, piston rod, drive assembly, buffer assembly, helical gear set and spindle. The drive assembly promotes the movement of the piston rod and helical gear set, and the buffer assembly and guide grooves are used to reduce the vibration of the cutter plate, so as to achieve stable clamping and convenient disassembly of the cutter plate.
Improves machining accuracy, reduces toolbar vibration, enhances the reliability and durability of the transmission system, and facilitates the disassembly and replacement of toolbars.
Smart Images
Figure CN223063107U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of mechanical transmission and gear processing, and in particular to a closed-loop gear backlash elimination structure for a gear milling processing speed reducer box. Background Art
[0002] In high-precision gear milling processing equipment, gear transmission clearance is used to improve processing accuracy and stability. In a gear transmission system, due to the existence of meshing clearance between gears, problems such as decreased transmission accuracy, increased noise, and unstable system operation often occur.
[0003] The internal transmission system of a gear milling box for gear milling consists of multiple sets of helical gear sets. A cutter head for processing workpieces is installed at the bottom of the gear milling box. In the existing processing process, there is a clearance between the transmission system and the cutter head, resulting in unstable clamping force at both ends of the cutter head, causing the cutter head to vibrate, affecting the accuracy of the processed workpiece, and also being inconvenient for disassembling the cutter head. Utility Model Content
[0004] In order to improve the problem that there is a clearance between the traditional system and the cutter head during the processing process, which affects the processing accuracy of the cutter head and the difficulty of disassembling the cutter head, this application provides a closed-loop gear backlash elimination structure for a gear milling processing speed reducer box.
[0005] A closed-loop gear backlash elimination structure for a gear milling processing speed reducer box provided by this application adopts the following technical solutions:
[0006] A closed-loop gear backlash elimination structure for a gear milling processing speed reducer box includes an end seat, a piston rod, a driving component, a buffer component, a helical gear set, a main shaft, and a gear milling box. The end seat is installed on one side of the gear milling box. The main shaft is rotatably arranged between the gear milling box and the end seat. The piston rod is movably arranged in a movable cavity opened on the main shaft along the axis of the main shaft. The buffer component is used to buffer the piston rod movably arranged in the movable cavity. The driving component is installed on the gear milling box. The driving component is used to push the piston rod in the movable cavity. The piston rod and the helical gear set are connected by a locking member. The helical gear set is slidably arranged on the main shaft.
[0007] By adopting the above technical solutions, a detachable cutter head is installed at the bottom of the gear milling box. When the cutter head processes a workpiece, the driving component pushes the piston rod and the helical gear set connected to the piston rod to move to the right. The buffer component located in the movable cavity is compressed, so that the cutter head at the bottom of the gear milling box is tightly pressed on both sides, reducing the vibration effect generated during cutter head processing and improving the accuracy of the processed workpiece. When the cutter head needs to be replaced and disassembled, the piston rod moves to the left along the axis of the main shaft, so that the helical gear set also moves to the left together, creating a gap on one side of the cutter head, which is convenient for disassembling the cutter head.
[0008] Optionally, the main shaft is axially provided with a guiding groove, and the helical gear set is in sliding fit with the guiding groove.
[0009] By adopting the above technical solution, the guiding groove formed on the main shaft is used for limiting the helical gear sleeved on the main shaft, facilitating the axial movement when adjusting the clearance of the helical gear.
[0010] Optionally, the locking member includes a limiting post and a limiting ring. A keyway is provided on the main shaft, the notch of the keyway is larger than the diameter of the limiting post. The limiting post respectively penetrates through the helical gear set and the piston rod, and the limiting ring is fixedly sleeved at both ends of the limiting post.
[0011] By adopting the above technical solution, the piston rod moves along the axis of the main shaft. The limiting post passing through the main shaft facilitates driving the distance of the piston rod within the range of the moving keyway, and the limiting ring circumferentially limits the limiting posts installed on the main shaft and the piston rod.
[0012] Optionally, a socket is movably sleeved in the end seat. An oil inlet hole is formed on the end seat. An oil cavity is formed between the socket and the end seat. The oil inlet hole communicates with the oil cavity. The driving assembly includes an oil cylinder and an oil pipe. The oil cylinder is installed on the gear milling box. One end of the oil pipe is connected to the output end of the oil cylinder, and the other end of the oil pipe is connected to the oil inlet hole.
[0013] By adopting the above technical solution, when the oil cylinder supplies oil to the oil cavity, it is transported along the oil pipe to the oil inlet hole, pushing the piston rod to move to the left; when the oil cavity returns oil, the piston rod moves to the right.
[0014] Optionally, the buffer assembly includes a disc spring and an elastic gasket. One end of the disc spring is connected to the main shaft, the other end of the disc spring is connected to the piston rod, and the elastic gasket is arranged on the socket.
[0015] By adopting the above technical solution, the disc spring is located in the movable cavity. When the piston rod approaches the axis of the main shaft, the disc spring is compressed; when the piston rod moves away from the axis of the main shaft, the disc spring rebounds. The stress distribution of the disc spring decreases uniformly from the inside to the outside, achieving the effect of high compensation force at low stroke.
[0016] Optionally, a cover is installed on one side of the end seat, and the cover and the end seat are fastened by bolts.
[0017] By adopting the above technical solution, the cover has a good sealing effect on one side of the end seat, and is convenient for installation or disassembly itself.
[0018] Optionally, at least 3 groups of helical gear sets are provided.
[0019] By adopting the above technical solution, the use of multiple groups of helical gear sets for transmission enables the whole to bear greater loads, reduces vibration and impact. The use of multiple groups of helical gears can improve the reliability and durability of the transmission system, and reduce the occurrence of failure rate and noise.
[0020] Optionally, a bearing is movably sleeved on the middle part of the main shaft.
[0021] By adopting the above technical solution, the rotation accuracy of the main shaft is guaranteed, the transmission energy loss is reduced, and a good supporting effect on the main shaft is achieved.
[0022] In summary, the present application includes at least one of the following beneficial technical effects:
[0023] 1. When the piston rod located in the movable cavity approaches the main shaft side, the buffer assembly in the movable cavity is compressed, reducing the clearance between the helical gear set and one end of the main shaft, improving the clamping effect of the cutter head installed on the transmission system, reducing the vibration effect of the cutter head during machining, and improving the machining accuracy of the workpiece;
[0024] 2. When disassembling the cutter head, the piston rod moves away from the main shaft side, driving the helical gear set to move to the left, facilitating the reduction of the acting force pressing against the cutter head on one side and generating a clearance therewith, facilitating the disassembly and replacement of the cutter head. Description of the Drawings
[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0026] Figure 1 It is a partial structural schematic diagram showing the driving component of the present application.
[0027] Figure 2 It is a partial cross-sectional schematic diagram showing the present application.
[0028] Figure 3 It is a view showing the present application Figure 2 A magnified view in the direction A.
[0029] Figure 4 It is a partial internal structural schematic diagram showing the present application.
[0030] Figure 5 It is a view showing the present application Figure 4 B magnified view.
[0031] Reference numerals: 1, end seat; 2, piston rod; 3, drive assembly; 4, buffer assembly; 5, helical gear set; 6, main shaft; 7, gear milling box; 8, movable cavity; 9, locking member; 10, guide groove; 91, limit post; 92, limit ring; 11, socket; 12, oil inlet hole; 13, oil cavity; 31, oil cylinder; 32, oil pipe; 41, disc spring; 42, elastic gasket; 14, cover; 15, keyway; 16, bearing. Detailed implementation manners
[0032] The following further describes the present application in detail with reference to Figure 1 and Figure 5 the accompanying drawings.
[0033] An embodiment of the present application discloses a closed-loop gear backlash elimination structure for a gear milling reducer.
[0034] Referring to Figure 1 and Figure 2 as shown, it is composed of an end seat 1, a piston rod 2, a drive assembly 3, a buffer assembly 4, a helical gear set 5, a main shaft 6 and a gear milling box 7. The end seat 1 is installed on one side of the gear milling box 7. The main shaft 6 is rotatably arranged between the gear milling box 7 and the end seat 1. The piston rod 2 is movably arranged in a movable cavity 8 opened on the main shaft 6 along the axis direction of the main shaft 6. A bearing 16 is movably sleeved in the middle of the main shaft 6. The bearing 16 on the main shaft 6 improves the rotation accuracy, reduces the loss of transmission energy consumption, and is convenient for supporting both ends during installation.
[0035] The buffer assembly 4 is used to buffer the piston rod 2 movably arranged in the movable cavity 8. The drive assembly 3 is installed on the gear milling box 7. The drive assembly 3 is used to push the piston rod 2 in the movable cavity 8. The piston rod 2 and the helical gear set 5 are connected by a locking member 9. The helical gear set 5 is slidably arranged on the main shaft 6. At least three groups of helical gear sets 5 are provided. The transmission of multiple groups of helical gear sets 5 enables the whole to bear greater loads, reduces the vibration and impact of the workpiece. The use of multiple groups of helical gears can improve the reliability and durability of the transmission system.
[0036] Referring to Figure 4 as shown, a guide groove 10 is axially opened on the main shaft 6. The helical gear set 5 is in sliding fit with the guide groove 10. The guide groove 10 opened on the main shaft 6 is convenient for limiting the helical gear, so that when adjusting the clearance on the helical gear, the helical gear is convenient to move along the axis direction of the main shaft 6, thereby compressing the buffer assembly 4 in the movable cavity 8, reducing the rebound, and ensuring the constant clamping force at both ends of the cutter head.
[0037] Referring to Figure 5As shown, the locking member 9 is composed of a limit post 91 and a limit ring 92. A keyway 15 is provided on the main shaft 6. The notch of the keyway 15 is larger than the diameter of the limit post 91. The limit post 91 respectively penetrates through the helical gear and the piston rod 2. The limit ring 92 is fixedly sleeved at both ends of the limit post 91. The limit post 91 penetrates through the helical gear set 5 and the piston rod 2, and the limit ring 92 is used to limit and fix the limit post 91. When the piston rod 2 moves in the moving cavity 8, the piston rod 2 drives the helical gear to move on the guiding groove 10 of the main shaft 6, facilitating backlash elimination.
[0038] See Figure 3 As shown, a socket 11 is movably sleeved inside the end seat 1. An oil inlet hole 12 is formed on the end seat 1. An oil cavity 13 is formed between the socket 11 and the end seat 1. The oil inlet hole 12 is communicated with the oil cavity 13. The driving assembly 3 includes an oil cylinder 31 and an oil pipe 32. The oil cylinder 31 is installed on the milling tooth box 7. One end of the oil pipe 32 is connected to the output end of the oil cylinder 31, and the other end of the oil pipe 32 is connected to the oil inlet hole 12. When the oil cylinder 31 supplies oil to the oil cavity 13, it is delivered to the oil inlet hole 12 along the oil pipe 32, pushing the piston rod 2 to move to the right; when the oil cavity 13 returns oil, the piston rod 2 moves to the left; the piston rod 2 moves in the moving cavity 8 under the action of the oil pressure in the oil cavity 13, controlling the position of the helical gear on the main shaft 6, enhancing the pressing action of the transmission system connected to one side of the cutter head on the cutter head, reducing the vibration generated during production and processing of the cutter head, and ensuring the accuracy of the machined workpiece.
[0039] See Figure 3 As shown, the buffer assembly 4 is composed of a disc spring 41 and an elastic gasket 42. One end of the disc spring 41 is connected to the main shaft 6, and the other end of the disc spring 41 is connected to the piston rod 2. The elastic gasket 42 is arranged on the socket 11. The disc spring 41 is located in the moving cavity 8. When the piston rod 2 approaches the axis direction of the main shaft 6, the disc spring 41 is compressed; when the piston rod 2 moves away from the axis direction of the main shaft 6, the disc spring 41 rebounds. The stress distribution of the disc spring 41 decreases uniformly from the inside to the outside, achieving the effect of high compensation force with low stroke.
[0040] See Figure 3 As shown, a cover 14 is installed on one side of the end seat 1. The cover 14 and the end seat 1 are fastened by bolts. The installed cover 14 improves the sealing performance of one side of the end seat 1, and at the same time, the bolt fastening method facilitates installation or disassembly.
[0041] The implementation principle of a closed-loop gear backlash elimination structure for a gear milling reducer in an embodiment of this application is as follows: A cutter head is installed at the bottom of the gear milling box 7. One side of the cutter head is constantly under a pressing action, while the pressing action on the other side of the cutter head changes with the position change of the helical gear set 5 on the transmission system. Oil is supplied into the oil cavity 13 by the oil cylinder 31. The disc spring 41 in the movable cavity 8 is compressed, the piston rod 2 moves closer to the main shaft 6, and at the same time, the piston rod 2 drives the helical gear set 5 to move to the right, increasing the pressing action on the side of the cutter head by the movable helical gear set 5, reducing the vibration of the cutter head during processing, and improving the machining accuracy of the workpiece. When the cutter head is disassembled, the piston rod 2 and the helical gear set 5 move to the left, facilitating the reduction of the pressing force on one side of the cutter head and generating a gap therewith, which is convenient for the installation, disassembly, and replacement of the cutter head.
[0042] Unless otherwise defined, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the field to which this application pertains. The words "first", "second", "third", and similar terms used in the specification and claims of this application do not denote any order, quantity, or importance, but are only used to distinguish different components. Words such as "a" or "an" do not denote a quantity limitation either, but indicate the existence of at least one. Words such as "comprising" or "including" mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. "Upper", "lower", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationships may also change accordingly.
[0043] The above are all preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.
Claims
1. A closed-loop gear backlash elimination structure for a milling gear reduction box, characterized in that: It includes an end seat (1), a piston rod (2), a driving assembly (3), a buffer assembly (4), a helical gear set (5), a main shaft (6) and a gear milling box (7). The end seat (1) is installed on one side of the gear milling box (7). The main shaft (6) is rotatably arranged between the gear milling box (7) and the end seat (1). The piston rod (2) is movably arranged in a movable cavity (8) opened on the main shaft (6) along the axis direction of the main shaft (6). The buffer assembly (4) is used to buffer the piston rod (2) movably arranged in the movable cavity (8). The driving assembly (3) is installed on the gear milling box (7), and the driving assembly (3) is used to push the piston rod (2) in the movable cavity (8). The piston rod (2) and the helical gear set (5) are connected by a locking member (9), and the helical gear set (5) is slidably arranged on the main shaft (6).
2. The closed-loop gear backlash elimination structure of a milling gear processing speed reducer according to claim 1, characterized in that: The main shaft (6) is axially provided with a guiding groove (10), and the helical gear set (5) is in sliding fit with the guiding groove (10).
3. A closed-loop gear backlash elimination structure for a gear hobbing processing reduction box according to claim 1, characterized in that: The locking member (9) includes a limiting post (91) and a limiting ring (92). A keyway (15) is provided on the main shaft (6). The notch of the keyway (15) is larger than the diameter of the limiting post (91). The limiting post (91) respectively penetrates through the helical gear set (5) and the piston rod (2), and the limiting ring (92) is fixedly sleeved at both ends of the limiting post (91).
4. A closed-loop gear backlash elimination structure for a gear milling processing speed reducer according to claim 1, characterized in that: A socket (11) is movably sleeved in the end seat (1). An oil inlet hole (12) is opened on the end seat (1). An oil cavity (13) is formed between the socket (11) and the end seat (1). The oil inlet hole (12) is communicated with the oil cavity (13). The driving assembly (3) includes an oil cylinder (31) and an oil pipe (32). The oil cylinder (31) is installed on the gear milling box (7). One end of the oil pipe (32) is connected to the output end of the oil cylinder (31), and the other end of the oil pipe (32) is connected to the oil inlet hole (12).
5. A backlash elimination structure for a closed-loop gear of a milling gear processing reduction box according to claim 4, characterized in that: The buffer assembly (4) includes a disc spring (41) and an elastic gasket (42). One end of the disc spring (41) is connected to the main shaft (6), and the other end of the disc spring (41) is connected to the piston rod (2). The elastic gasket (42) is arranged on the socket (11).
6. The closed-loop gear backlash elimination structure for a gear milling and processing speed reducer according to claim 4, characterized in that: A cover (14) is installed on one side of the end seat (1), and the cover (14) and the end seat (1) are fastened by bolts.
7. A closed-loop gear backlash elimination structure for a milling gear processing reduction box according to claim 1, characterized in that: At least 3 groups of the helical gear set (5) are provided.
8. A closed-loop gear backlash elimination structure for a gear milling processing speed reducer according to claim 1, characterized in that: A bearing (16) is movably sleeved in the middle of the main shaft (6).