CN110193747B - Ram transmission clearance elimination assembly - Google Patents
Ram transmission clearance elimination assembly Download PDFInfo
- Publication number
- CN110193747B CN110193747B CN201910583969.9A CN201910583969A CN110193747B CN 110193747 B CN110193747 B CN 110193747B CN 201910583969 A CN201910583969 A CN 201910583969A CN 110193747 B CN110193747 B CN 110193747B
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- ram
- driving gear
- gear
- shaft
- driving
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/54—Arrangements or details not restricted to group B23Q5/02 or group B23Q5/22 respectively, e.g. control handles
- B23Q5/56—Preventing backlash
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
Abstract
The invention relates to the field of machine tool structures, in particular to a ram transmission clearance elimination assembly, wherein a first driving gear and a second driving gear are arranged on a ram, a mounting hole on the second driving gear is sleeved on a mounting shaft on the first driving gear, the end faces of the two driving gears are abutted, gear teeth of the first driving gear and gear teeth of the second driving gear are respectively abutted against different-side tooth faces of a driven gear on a base, so that a clearance between teeth is eliminated, high-precision transmission is realized, the situation that the ram is inclined abnormally relative to the base when a machine tool main shaft is machined is avoided, the first driving gear and the second driving gear are combined into a whole, the weight and the volume of the assembly are reduced, the rotational inertia of the ram is smaller, the quick inclination of the ram is facilitated, and the machining efficiency of a machine tool is improved.
Description
Technical Field
The invention relates to the field of machine tool structures, in particular to a ram transmission clearance eliminating assembly.
Background
The existing part of five-axis drilling and milling compound machine tool or six-axis compound machine tool is provided with a ram capable of tilting (such as patent document CN 108436466A), and the ram is rotationally connected to a base through a rotating shaft which is horizontally arranged, so that the ram can tilt on a vertical surface, and further the multi-angle feeding of a machine tool main shaft is realized. In order to realize tilting of the ram relative to the base, a gear-rack transmission mechanism or a gear transmission mechanism in the prior art is selected, however, a pair of gears meshed with each other have inter-tooth gaps, the inter-tooth gaps enable the ram and the base to be incapable of moving relatively with high precision, and in the process of machining a workpiece by a machine tool spindle, the inter-tooth gaps can allow the ram to slightly tilt relative to the base, so that the workpiece is in a low quality. There are inter-tooth gap eliminating mechanisms in the prior art, such as CN107366724A, CN103753333a, which generally use a plurality of driving gears arranged in parallel to drive a driven gear (or driven rack), wherein the plurality of driving gears respectively abut against tooth surfaces on opposite sides of the driven gear. However, since the plurality of driving gears are sequentially disposed on the outer circumference of the driven gear, especially when the interdental clearance eliminating mechanism in the prior art is disposed on the ram, the moment of inertia of the ram is large, which is not conducive to the rapid tilting of the ram on the base.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a ram transmission clearance eliminating assembly, so as to solve the problem that the moment of inertia of the ram is too large due to the large volume and weight of the existing interdental clearance eliminating mechanism.
Based on the above, the invention provides a ram transmission clearance elimination assembly, which comprises a base and a ram rotationally connected with the base; the base is provided with a driven gear which is coaxially arranged with the rotation axis of the ram, the ram is provided with a first driving gear and a second driving gear, the first driving gear is fixedly provided with a mounting shaft, the second driving gear is provided with a mounting hole, the mounting shaft is penetrated through and connected with the mounting hole, and the end face of the first driving gear is abutted against the end face of the second driving gear; the first driving gear and the second driving gear are both meshed with the driven gear, and the gear teeth of the first driving gear and the gear teeth of the second driving gear are respectively abutted against the opposite-side tooth surfaces of the driven gear.
Preferably, the second driving gear is further provided with a hollow shaft, and the mounting shaft is arranged through the mounting hole and a central hole of the hollow shaft.
Preferably, one end of the first driving gear is provided with a transmission shaft, the other end of the first driving gear is provided with the mounting shaft, the transmission shaft is rotationally connected with the ram through a first thrust bearing, and the hollow shaft is rotationally connected with the ram through a second thrust bearing.
Preferably, the device further comprises a tensioning gasket, the tensioning gasket further comprises an inner ring and an outer ring which are abutted, the contact surface of the inner ring and the outer ring is a conical surface, and two ends of the tensioning gasket are respectively connected with the mounting hole and the mounting shaft.
Preferably, the device further comprises an end cover connected to the end of the mounting shaft, and the end face of the end cover is abutted against one end of the tensioning gasket.
Preferably, the device further comprises a driving mechanism, wherein the driving mechanism comprises a driving belt wheel, a driven belt wheel, a driving belt wound on the driving belt wheel and the driven belt wheel and a driving device arranged on the ram, the driving belt wheel is connected with the driving device, and the driven belt wheel is connected with the first driving gear.
Preferably, the driven gear has a fan-shaped structure.
Preferably, the head end of the ram is rotatably connected to the base through a rotating shaft, and the first driving gear and the second driving gear are both located at the tail end of the ram.
According to the ram transmission clearance elimination assembly, the first driving gear and the second driving gear are arranged on the ram, the mounting hole on the second driving gear is sleeved on the mounting shaft on the first driving gear, the end faces of the two driving gears are abutted, the gear teeth of the first driving gear and the gear teeth of the second driving gear are respectively abutted on the opposite side tooth faces of the driven gear on the base, so that gaps between teeth are eliminated, high-precision transmission is realized, the situation that the ram is inclined abnormally relative to the base during machining is avoided, the first driving gear and the second driving gear are combined into a whole, the weight and the volume of the assembly are reduced, and the rotational inertia of the ram is smaller.
Drawings
FIG. 1 is a schematic diagram of the connection state of a first driving gear, a second driving gear and a driven gear of a ram transmission gap elimination assembly according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a ram and a base of a ram drive gap elimination assembly of an embodiment of the invention;
FIG. 3 is a schematic rear view of a ram and a base of a ram drive gap elimination assembly according to an embodiment of the invention;
FIG. 4 is a front schematic view of a ram and a base of a ram drive gap elimination assembly according to an embodiment of the invention;
FIG. 5 is a schematic top view of a ram and a base of a ram drive gap elimination assembly according to an embodiment of the invention;
FIG. 6 is a schematic illustration of the construction of a tension washer of a ram drive gap elimination assembly according to an embodiment of the invention.
1, A base; 2. a ram; 21. a first thrust bearing; 22. a second thrust bearing; 3. a driven gear; 4. a first drive gear; 41. a mounting shaft; 42. a transmission shaft; 5. a second drive gear; 51. a mounting hole; 52. a hollow shaft; 6. tensioning the gasket; 61. an inner ring; 62. an outer ring; 7. an end cap; 8. a driving mechanism; 81. a driving pulley; 82. a driven pulley; 83. a transmission belt; 84. a driving device.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1 to 6, there is schematically shown a ram transmission clearance eliminating assembly according to the present invention, including a base 1 and a ram 2 rotatably connected thereto, a spindle of a machine tool being mounted on the ram 2, the ram 2 being tiltable relative to the base 1 to adjust an angle between the spindle and a workpiece, so that the machine tool can machine the workpiece at a plurality of angles. As shown in fig. 3 and fig. 4, the driven gear 3 coaxially arranged with the rotation axis of the ram 2 is arranged on the base 1, the ram 2 is provided with a first driving gear 4 and a second driving gear 5 with axes coincident, as shown in fig. 1, the first driving gear 4 is fixedly provided with a mounting shaft 41, the second driving gear 5 is provided with a mounting hole 51, the mounting shaft 41 is penetrated and connected with the mounting hole 51, and the end face of the first driving gear 4 is abutted with the end face of the second driving gear 5, so that the first driving gear 4 and the second driving gear 5 are combined into one. The first driving gear 4 and the second driving gear 5 are both meshed with the driven gear 3, it can be understood that the thickness of the first driving gear 4 and the thickness of the second driving gear 5 are both smaller than the thickness of the driven gear 3 (the thickness of the gears refers to the distance between two end faces of the gears), so that the volume and the weight of the assembly are reduced, the gear teeth of the first driving gear 4 and the gear teeth of the second driving gear 5 are respectively abutted against the opposite side tooth faces of the driven gear 3, gaps between the gear teeth are eliminated, transmission precision is improved, abnormal tilting of the ram 2 relative to the base 1 during machining of a workpiece by a machine tool is prevented, and machining precision is further improved.
The second driving gear 5 is further provided with a hollow shaft 52, the mounting shaft 41 is arranged in the central holes of the mounting hole 51 and the hollow shaft 52 in a penetrating manner, the hollow shaft 52 can promote connection tightness of the second driving gear 5 and the first driving gear 4, further prevent the axis of the second driving gear 5 and the axis of the first driving gear 4 from deflecting, and of course, the second driving gear 5 and the hollow shaft 52 can be of an integrated structure, and the central holes of the mounting hole 51 and the hollow shaft 52 are the same hole. Specifically, one end of the first driving gear 4 is provided with a transmission shaft 42, the other end is provided with the mounting shaft 41, the transmission shaft 42 is rotatably connected to the ram 2 through the first thrust bearing 21, the hollow shaft 52 is rotatably connected to the ram 2 through the second thrust bearing 22, and thrust directions of the first thrust bearing 21 and the second thrust bearing 22 are opposite, so that the first thrust bearing 21 and the second thrust bearing 22 can also provide thrust forces to force the first driving gear 4 and the second driving gear 5 to tightly fit.
In order to adjust the deflection angle between the first driving gear 4 and the second driving gear 5 and to mutually lock the two driving gears, the assembly further comprises a tensioning gasket 6 and an end cover 7, and as shown in fig. 1 and 6, the tensioning gasket 6 further comprises an inner ring 61 and an outer ring 62 which are in butt joint, the contact surfaces of the inner ring 61 and the outer ring 62 are conical surfaces, when external force forces the inner ring 61 and the outer ring 62 to move towards each other in the axial direction, the inner diameter of the inner ring 61 is reduced, the outer diameter of the outer ring 62 is enlarged, and two ends of the tensioning gasket 6 are respectively connected with the mounting hole 51 and the mounting shaft 41. The end cover 7 is connected to the end of the mounting shaft 41 by a bolt, the distance between the end cover 7 and the end of the mounting shaft 41 can be adjusted by an adjusting bolt, the end face of the end cover 7 is abutted against one end of the tensioning washer 6 (in this embodiment, the end face of the end cover 7 is abutted against the end face of the outer ring 62, and the end face of the inner ring 61 is abutted against the end face of the shoulder on the mounting shaft 41), therefore, when the end cover 7 and the end of the mounting shaft 41 are adjusted by the adjusting bolt, the distance between the end face of the end cover 7 and the end of the mounting shaft 41 is reduced, so that the end face of the end cover 7 applies pressure to the outer ring 62 of the tensioning washer 6, the inner ring 61 is forced to pinch the mounting shaft 41, and the outer ring 62 is expanded and abutted against the wall of the mounting hole 51 (or the central hole of the hollow shaft 52), thereby connecting the first driving gear 4 and the second driving gear 5. It will be appreciated, of course, that the deflection angles of the first and second drive gears 4, 5 should be manually adjusted prior to tightening the end cap 7 described above such that the teeth of the first drive gear 4 and the teeth of the second drive gear 5 respectively abut against the flank flanks of the driven gear 3.
The assembly is further provided with a driving mechanism 8, the driving mechanism 8 comprises a driving pulley 81, a driven pulley 82, a driving belt 83 wound on the driving pulley 81 and the driven pulley 82 and a driving device 84 arranged on the ram 2, the driving device 84 is a motor, the driving belt 83 is preferably a synchronous belt, the driving pulley 81 is connected to the driving device 84, the driven pulley 82 is connected to the first driving gear 4, and the synchronous belt driving mechanism is stable and quiet in driving under the condition of ensuring the driving precision. In this embodiment, the driven gear 3 has a fan-shaped structure, the head end of the ram 2 is rotatably connected to the base 1 through a rotating shaft, and the first driving gear 4 and the second driving gear 5 are both located at the tail end of the ram 2. Of course, in some alternative embodiments, the drive 84 can also be directly connected to the drive shaft 42 of the first drive gear 4 such that the drive 84 directly drives the first drive gear 4 in rotation.
In summary, in the ram transmission clearance eliminating assembly of the present invention, the first driving gear 4 and the second driving gear 5 are disposed on the ram 2, the mounting hole 51 on the second driving gear 5 is sleeved on the mounting shaft 41 on the first driving gear 4, the end faces of the two driving gears are abutted, the teeth of the first driving gear 4 and the teeth of the second driving gear 5 are respectively abutted on the opposite side tooth faces of the driven gear 3 on the base 1, so as to eliminate the clearance between teeth, realize high-precision transmission, avoid the situation that the ram 2 is inclined abnormally relative to the base 1 when the spindle of the machine tool is processed, and combine the first driving gear 4 and the second driving gear 5, so that the weight and the volume of the assembly are reduced, and the moment of inertia of the ram 2 is smaller.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (5)
1. A ram transmission clearance elimination assembly is characterized by comprising a base and a ram rotationally connected with the base; the base is provided with a driven gear which is coaxially arranged with the rotation axis of the ram, the ram is provided with a first driving gear and a second driving gear, the first driving gear is fixedly provided with a mounting shaft, the second driving gear is provided with a mounting hole, the mounting shaft is penetrated through and connected with the mounting hole, and the end face of the first driving gear is abutted against the end face of the second driving gear; the first driving gear and the second driving gear are both meshed with the driven gear, and the gear teeth of the first driving gear and the gear teeth of the second driving gear are respectively abutted against the opposite-side tooth surface of the driven gear;
The second driving gear is also provided with a hollow shaft, and the mounting shaft is arranged through the mounting hole and the central hole of the hollow shaft;
One end of the first driving gear is provided with a transmission shaft, the other end of the first driving gear is provided with the installation shaft, the transmission shaft is rotationally connected with the ram through a first thrust bearing, and the hollow shaft is rotationally connected with the ram through a second thrust bearing;
The novel anti-theft device is characterized by further comprising a tensioning gasket, the tensioning gasket further comprises an inner ring and an outer ring which are abutted against each other, the contact surface of the inner ring and the outer ring is a conical surface, and two ends of the tensioning gasket are respectively connected with the mounting hole and the mounting shaft.
2. The ram transmission clearance elimination assembly according to claim 1, further comprising an end cap connected to an end of the mounting shaft, an end face of the end cap abutting an end of the tension washer.
3. The ram transmission gap elimination assembly according to claim 1 further comprising a drive mechanism comprising a drive pulley, a driven pulley, a drive belt wound around the drive pulley and the driven pulley, and a drive device provided to the ram, the drive pulley being connected to the drive device, the driven pulley being connected to the first drive gear.
4. The ram transmission clearance elimination assembly of claim 1, wherein the driven gear is in a fan-like configuration.
5. The ram transmission clearance elimination assembly according to claim 1, wherein the head end of the ram is rotatably connected to the base by a shaft, and the first and second drive gears are located at the tail end of the ram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583969.9A CN110193747B (en) | 2019-06-28 | 2019-06-28 | Ram transmission clearance elimination assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583969.9A CN110193747B (en) | 2019-06-28 | 2019-06-28 | Ram transmission clearance elimination assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110193747A CN110193747A (en) | 2019-09-03 |
| CN110193747B true CN110193747B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910583969.9A Active CN110193747B (en) | 2019-06-28 | 2019-06-28 | Ram transmission clearance elimination assembly |
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| CN (1) | CN110193747B (en) |
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| CN104128835A (en) * | 2014-07-18 | 2014-11-05 | 宁波夏拓机械装备有限公司 | Bevel gear gap eliminating mechanism and gap eliminating method |
| CN203936696U (en) * | 2014-07-18 | 2014-11-12 | 宁波夏拓机械装备有限公司 | A kind of helical gear anti-backlash mechanism |
| CN204381556U (en) * | 2014-12-27 | 2015-06-10 | 长泰县海力机械制造有限公司 | A kind of ball valve core machining tool |
| CN105081853A (en) * | 2015-09-10 | 2015-11-25 | 沈机集团昆明机床股份有限公司 | Linear feeding mechanism for milling-boring machine |
| CN108691975A (en) * | 2018-04-18 | 2018-10-23 | 环球工业机械（东莞）有限公司 | Gas-fee gare driving mechanism and its backlash removing method |
| CN109595333A (en) * | 2018-10-30 | 2019-04-09 | 成都飞机工业（集团）有限责任公司 | A kind of device for eliminating gear-box internal gear wheel gap |
| CN210160797U (en) * | 2019-06-28 | 2020-03-20 | 环球工业机械（东莞）有限公司 | Ram transmission clearance eliminating assembly |
-
2019
- 2019-06-28 CN CN201910583969.9A patent/CN110193747B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004249406A (en) * | 2003-02-20 | 2004-09-09 | Nippei Toyama Corp | Machining head of machine tool |
| CN2644060Y (en) * | 2003-08-27 | 2004-09-29 | 江苏多棱数控机床股份有限公司 | Numerical controlled large milling machine of five shaft linkage |
| CN201824027U (en) * | 2010-10-29 | 2011-05-11 | 四川普什宁江机床有限公司 | High-precision cylindrical gear pair capable of controlling transmission clearance |
| CN103753333A (en) * | 2013-11-28 | 2014-04-30 | 芜湖恒升重型机床股份有限公司 | Backlash Elimination Structure of Gear Transmission Mechanism |
| CN203696560U (en) * | 2013-11-28 | 2014-07-09 | 芜湖恒升重型机床股份有限公司 | Backlash Elimination Structure of Gear Transmission Mechanism |
| CN104128835A (en) * | 2014-07-18 | 2014-11-05 | 宁波夏拓机械装备有限公司 | Bevel gear gap eliminating mechanism and gap eliminating method |
| CN203936696U (en) * | 2014-07-18 | 2014-11-12 | 宁波夏拓机械装备有限公司 | A kind of helical gear anti-backlash mechanism |
| CN204381556U (en) * | 2014-12-27 | 2015-06-10 | 长泰县海力机械制造有限公司 | A kind of ball valve core machining tool |
| CN105081853A (en) * | 2015-09-10 | 2015-11-25 | 沈机集团昆明机床股份有限公司 | Linear feeding mechanism for milling-boring machine |
| CN108691975A (en) * | 2018-04-18 | 2018-10-23 | 环球工业机械（东莞）有限公司 | Gas-fee gare driving mechanism and its backlash removing method |
| CN109595333A (en) * | 2018-10-30 | 2019-04-09 | 成都飞机工业（集团）有限责任公司 | A kind of device for eliminating gear-box internal gear wheel gap |
| CN210160797U (en) * | 2019-06-28 | 2020-03-20 | 环球工业机械（东莞）有限公司 | Ram transmission clearance eliminating assembly |
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| CN110193747A (en) | 2019-09-03 |
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