CN209959818U - Novel gear rack transmission mechanism - Google Patents
Novel gear rack transmission mechanism Download PDFInfo
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- CN209959818U CN209959818U CN201822095326.3U CN201822095326U CN209959818U CN 209959818 U CN209959818 U CN 209959818U CN 201822095326 U CN201822095326 U CN 201822095326U CN 209959818 U CN209959818 U CN 209959818U
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Abstract
The utility model provides a novel rack and pinion drive mechanism, including the loading board, the upside of loading board is provided with actuating mechanism, actuating mechanism's downside is provided with the drive shaft, the drive shaft passes one of loading board and serves and be provided with the action wheel, be provided with 2 gear groups on one side of action wheel, all be provided with the pivot on every gear group, the one end of every pivot is all passed the loading board, and all through ball bearing with the loading board is connected, lie in every pivot the downside of loading board all is provided with first gear and second gear, every first gear all with the action wheel meshing, the downside level of action wheel is provided with the rack, every second gear all with rack toothing. The transmission mechanism adopts the double gear set to be meshed with the rack, and the gear rotates forwards and backwards to eliminate the gap problem when the gear is meshed, so that the precision of the moving distance is ensured, and the cost is reduced.
Description
Technical Field
The utility model relates to a numerical control processing equipment field especially relates to a novel rack and pinion drive mechanism.
Background
The numerical control machining is a mechanical machining method for controlling displacement of parts and tools by digital information, and a transmission mechanism is usually adopted to drive a machine tool to move for a long distance in the numerical control machining process, so that the machining quality is stable, and the machining precision is high.
At present, high-precision gear rack transmission is often adopted to replace ball screw transmission so as to ensure the transmission precision and the service life. However, the feeding system of the machine tool is often in an automatic direction changing state, and when a gap exists between the gear and the rack in the reverse direction, the reverse direction of the feeding motion lags behind a command signal, so that the driving precision of the feeding system is influenced.
In order to realize high transmission precision of a rack and pinion, in a utility model patent with the application number of CN201620373243.4, a rack and pinion meshing clearance micro-adjustment mechanism is disclosed, which comprises a supporting seat, a power assembly is placed in an inner cavity of the supporting seat, and the power assembly is fixed with the supporting seat through a reducer screw; the two sides of the power component are respectively provided with an adjusting component; the power assembly comprises a servo motor, an output shaft of the servo motor is connected with a precision speed reducer, and an output shaft of the precision speed reducer is connected with a precision gear; the precise gear is meshed with the precise rack, and the precise rack is arranged on the base. When the precise gear rack is used, the meshing clearance between the precise gear and the precise rack reaches the standard through the adjusting screw, so that the transmission precision of the linear coordinate of the numerical control equipment is stable and reliable.
However, although the transmission mechanism using the servo motor to directly drive the gear rack can avoid the length limitation of the screw transmission theoretically, the meshing gap still exists, and when the gear rack moves in the opposite direction, the reverse gap exists, which easily causes the transmission mechanism to generate a nonlinear error. Due to the existence of the reverse clearance, a return error is generated, so that the transmission mechanism has the condition of lagging behind the command signal in the reverse direction, and the transmission precision is influenced.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a novel rack and pinion transmission mechanism, which employs a double gear set and a rack gear, wherein the gear rotates forward and backward to eliminate the gap problem when the gear is engaged, thereby ensuring the precision of the moving distance.
Another object of the utility model is to provide a novel rack and pinion drive mechanism, this drive mechanism pass through actuating mechanism and drive double gear group and rotate, simple structure, convenient to use, and the cost is reduced.
In order to achieve the above object, the technical solution of the present invention is as follows.
The utility model provides a novel rack and pinion drive mechanism, including the loading board, the upside of loading board is provided with actuating mechanism, actuating mechanism's downside is provided with the drive shaft, the drive shaft passes one of loading board and serves and be provided with the action wheel, be provided with 2 gear groups on one side of action wheel, all be provided with the pivot on every gear group, the one end of every pivot is all passed the loading board, and all through ball bearing with the loading board is connected, lie in every pivot the downside of loading board all is provided with first gear and second gear, every first gear all with the action wheel meshing, the downside level of action wheel is provided with the rack, every second gear all with rack toothing.
Further, the driving mechanism comprises a servo motor and a speed reducer, an output shaft of the servo motor is connected with the speed reducer, and the lower end of the speed reducer is connected with the driving shaft.
Further, the driving shaft is connected with the bearing plate through a ball bearing, a box body is arranged on the upper side of the bearing plate, and the part of the speed reducer connected with the driving shaft is arranged in the box body.
Further, a first bearing box is arranged at the position, located on the lower side of the driving wheel, of the tail end of the driving shaft, and the first bearing box is connected with the driving shaft through a ball bearing.
Furthermore, each rotating shaft is provided with a second bearing box which is positioned on the same horizontal plane with the first bearing box, each second bearing box is arranged between the corresponding first gear and the corresponding second gear, and each second bearing box is connected with the corresponding rotating shaft through a ball bearing.
Furthermore, the part of one end of each rotating shaft, which is positioned on the upper side of the bearing plate, is provided with a guide block, and the two sides of each guide block are provided with adjusting locking nuts and are fixedly connected with the bearing plate through the adjusting locking nuts.
Furthermore, a plurality of power locks are arranged on the part of each first gear, which is connected with the corresponding rotating shaft.
Further, each of the first gears and the driving wheel are spur gears.
Further, each second gear is a helical gear, and the rack is a helical rack.
Further, the downside of second gear is provided with the base, the rack is installed on the base, the both sides of base all be provided with rack parallel arrangement's guide rail.
The utility model has the advantages that:
compared with the prior art, the novel gear and rack transmission mechanism provided by the utility model adopts the double gear set to be meshed with the rack, and the gear rotates positively and negatively to eliminate the clearance problem when the teeth are meshed, thereby ensuring the precision of the moving distance; meanwhile, the double gear set is driven to rotate by the driving mechanism, the structure is simple, the use is convenient, and the cost is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a portion a of the schematic diagram of fig. 1 from a first viewing angle.
Fig. 3 is a schematic diagram of a portion a of the schematic diagram of fig. 1 from a second viewing angle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
The description in this application as relating to "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, for the embodiment of the present invention realizes a novel rack and pinion transmission mechanism, including a bearing plate 2, the upside of bearing plate 2 is provided with a driving mechanism 1, the downside of driving mechanism 1 is provided with a driving shaft 13, one end of bearing plate 2 that driving shaft 13 passes is provided with a driving wheel 3, one side of driving wheel 3 is provided with 2 gear sets 4, all be provided with a rotating shaft 41 on every gear set 4, bearing plate 2 is all passed to the one end of every rotating shaft 41, and all be connected with bearing plate 2 through ball bearing 5, the downside that lies in bearing plate 2 on every rotating shaft 41 all is provided with first gear 42 and second gear 43, every first gear 42 all meshes with driving wheel 3, the downside level of driving wheel 3 is provided with rack 6, every second gear 43 all meshes with rack 6.
The driving mechanism 1 comprises a servo motor 11 and a speed reducer 12, an output shaft of the servo motor 11 is connected with the speed reducer 12, and the lower end of the speed reducer 12 is connected with a driving shaft 13.
In this embodiment, the servo motor 11 is connected to a driving shaft 13 through a speed reducer 12, and a driving pulley 3 is connected to a lower end of the driving shaft 13, so that the driving pulley 3 drives 2 the gear set 4 to rotate. After the driving mechanism 1 is electrified, the driving shaft 13 is driven to rotate together with the driving wheel 3. The tooth-type meshing forms are arranged between the driving wheel 3 and the 2 first gears 42 and between the 2 second gears 43 and the rack 6. Here, the rack 6 is fixed, and the 2 second gears 43 are all meshed along the teeth on the rack 6, so as to drive the bed to move.
As shown in fig. 1 and fig. 2, the embodiment of the present invention provides a transmission mechanism, wherein 2 gear sets 4 are installed on one side of the driving mechanism 1, the first gear 42 on 2 gear sets 4 is engaged with the driving wheel 3 on the driving mechanism 1, the second gear 43 on 2 gear sets 4 is engaged with the rack 6, and after the servo motor 11 is powered on, the 2 gear sets 4 are driven to rotate along the rack 6. Because the double gears rotate positively and negatively, enough reverse driving force is always applied to the tooth surfaces of the racks 6, no matter the gears drive the lathe bed to move positively or reversely, no reverse gap is generated, the nonlinear error in the transmission process is eliminated, and the transmission precision of the gears and the racks is effectively improved.
Preferably, the driving shaft 13 is connected to the carrier plate 2 through the ball bearing 5, the upper side of the carrier plate 2 is provided with a case 21, and a portion of the speed reducer 12 connected to the driving shaft 13 is disposed in the case 21. Here, the part that the reduction gear is connected with the drive shaft and the part that lies in the loading board upside on the gear train all are located the box, make overall structure simple, and can improve the safety in utilization.
Preferably, the end of the drive shaft 13, which is located at the lower side of the drive pulley 3, is provided with a first bearing housing 14, which first bearing housing 14 is connected to the drive shaft 13 by means of ball bearings 5.
Meanwhile, each rotating shaft 41 is provided with a second bearing box 44 which is located on the same horizontal plane as the first bearing box 14, each second bearing box 44 is arranged between the corresponding first gear 42 and the corresponding second gear 43, and each second bearing box 44 is connected with the corresponding rotating shaft 41 through the ball bearing 5.
At this moment, first bearing box and 2 second bearing boxes are located a plane, and first bearing box is located the end of drive shaft, and the drive shaft is at the rotation in-process, connects first bearing box through ball bearing, makes the transmission of drive shaft accurate, does not take place the transmission offset.
First bearing box is all connected to 2 second bearing boxes, makes 2 pivot all at the second bearing box internal rotations rather than corresponding, has guaranteed the precision of displacement.
Example 2
Referring to fig. 1 to 3, the difference from the above embodiment is that a guide block 45 is provided at a portion of one end of each rotating shaft 41 located at an upper side of the loading plate 2, and an adjustment locking nut 46 is provided at both sides of each guide block 45 and is fixedly connected to the loading plate 2 by the adjustment locking nut 46.
In this embodiment, adjusting the lock nut can finely adjust the offset of 2 rotating shafts, thereby adjusting the engagement between 2 second gears and the rack, and enabling the 2 second gears to be in contact with one side surface of the teeth of the rack, so as to eliminate the engagement gap.
Preferably, each of the first gears 42 connected to the corresponding rotating shaft 41 is provided with a plurality of power locks 47. Here, the power lock can make 2 first gears realize the function of speed reduction and parking braking respectively to improve safety in utilization.
Preferably, each first gear 42 and the drive wheel 3 are spur gears. Each second gear 43 is a helical gear and the rack 6 is a helical rack. Specifically, the spur gear meshing is adopted between 2 first gears and the driving wheel, the helical gear can be adopted for 2 second gears, the rack can be a helical rack, the helical gear and the helical rack are meshed more tightly in the forward and reverse movement process, the meshing stability is good, the transmission mechanism is started stably, the transmission precision is higher, and the bearing capacity is larger.
Preferably, a base 7 is provided at the lower side of the second gear 43, the rack 6 is mounted on the base 7, and guide rails 8 arranged in parallel with the rack 6 are provided at both sides of the base 7. The rack can be arranged on the transmission mechanism, and the guide rails on two sides are connected through the rack to bear the weight of the machine tool, so that the meshing transmission of the rack and the 2 gear sets is facilitated.
It should be noted that, the rack-and-pinion transmission mechanism drives 2 gear sets to engage with the rack through one driving mechanism, so that the cost is reduced, the overall size is reduced, and the transmission precision is improved.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a novel rack and pinion drive mechanism, including the loading board, the upside of loading board is provided with actuating mechanism, actuating mechanism's downside is provided with the drive shaft, a serial communication port, the drive shaft passes one of loading board and serves and be provided with the action wheel, be provided with 2 gear sets on one side of action wheel, all be provided with the pivot on every gear set, the one end of every pivot is all passed the loading board, and all through ball bearing with the loading board is connected, lie in every pivot the downside of loading board all is provided with first gear and second gear, every first gear all with the action wheel meshing, the downside level of action wheel is provided with the rack, every second gear all with rack toothing.
2. The novel rack and pinion transmission mechanism of claim 1, wherein the drive mechanism includes a servo motor and a reducer, an output shaft of the servo motor is connected with the reducer, and a lower end of the reducer is connected with the drive shaft.
3. The novel rack and pinion transmission of claim 2 wherein the drive shaft is connected to the carrier plate by a ball bearing, the carrier plate having a housing on an upper side thereof, the reducer having a portion connected to the drive shaft disposed within the housing.
4. The novel rack and pinion drive of claim 1 wherein the end of the drive shaft on the underside of the drive wheel is provided with a first bearing housing, said first bearing housing being connected to the drive shaft by ball bearings.
5. The novel rack and pinion transmission mechanism according to claim 4, wherein each of the rotating shafts is provided with a second bearing box located on the same horizontal plane as the first bearing box, each of the second bearing boxes is arranged between the first gear and the second gear corresponding to the second bearing box, and each of the second bearing boxes is connected with the corresponding rotating shaft through a ball bearing.
6. The novel rack and pinion transmission mechanism as claimed in claim 1, wherein a guide block is provided on a portion of one end of each of the rotation shafts, which is located on an upper side of the bearing plate, and an adjustment locking nut is provided on both sides of each of the guide blocks and is fixedly connected to the bearing plate through the adjustment locking nut.
7. The novel rack and pinion transmission of claim 1 wherein the portion of each first gear that is connected to its corresponding shaft is provided with a plurality of power locks.
8. The novel rack and pinion gear of claim 1 wherein each of said first gear and said drive wheel are spur gears.
9. The novel rack and pinion gear of claim 1 wherein each of said second gears is a helical gear and said rack is a helical rack.
10. The novel rack and pinion transmission of claim 1 wherein the underside of the second gear is provided with a base on which the rack is mounted, and wherein the two sides of the base are each provided with a guide rail arranged parallel to the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095326.3U CN209959818U (en) | 2018-12-13 | 2018-12-13 | Novel gear rack transmission mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822095326.3U CN209959818U (en) | 2018-12-13 | 2018-12-13 | Novel gear rack transmission mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209959818U true CN209959818U (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822095326.3U Expired - Fee Related CN209959818U (en) | 2018-12-13 | 2018-12-13 | Novel gear rack transmission mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN209959818U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548415A (en) * | 2020-12-23 | 2021-03-26 | 山东中际智能装备有限公司 | Synchronous reverse moving device for stator torsion welding machine |
-
2018
- 2018-12-13 CN CN201822095326.3U patent/CN209959818U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112548415A (en) * | 2020-12-23 | 2021-03-26 | 山东中际智能装备有限公司 | Synchronous reverse moving device for stator torsion welding machine |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200117 Termination date: 20201213 |
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| CF01 | Termination of patent right due to non-payment of annual fee |