阅读说明：本技术 高精度丝杆螺母传动定位装置 (High-precision screw nut transmission positioning device ) 是由 葛明华 于 2021-09-30 设计创作，主要内容包括：本发明涉及丝杆螺母传动技术领域,具体涉及高精度丝杆螺母传动定位装置,包括固定架、驱动组件、传动组件和负载组件,固定架上安装有驱动组件,通过驱动组件驱动传动组件工作,带动负载组件进行移动；传动组件包括传动轴、主动锥形齿轮、从动锥形齿轮、第一轴承座、第二轴承座、丝杆和螺母；驱动组件的两个输出端连接有传动轴,固定架上通过第一轴承座转动安装有传动轴,传动轴的端部设有主动锥形齿轮,固定架上通过第一轴承座转动安装有丝杆；解决了丝杆螺母传动过程中,由于停止后存在定位精度低以及丝杆螺母本身存在间隙导致定位误差较大,一些高精度定位传动场合,存在无法适用的情况的问题。(The invention relates to the technical field of screw nut transmission, in particular to a high-precision screw nut transmission positioning device which comprises a fixed frame, a driving assembly, a transmission assembly and a load assembly, wherein the fixed frame is provided with the driving assembly, and the driving assembly drives the transmission assembly to work through the driving assembly to drive the load assembly to move; the transmission assembly comprises a transmission shaft, a driving conical gear, a driven conical gear, a first bearing seat, a second bearing seat, a lead screw and a nut; two output ends of the driving assembly are connected with transmission shafts, the transmission shafts are rotatably mounted on the fixed frame through first bearing seats, driving conical gears are arranged at the end parts of the transmission shafts, and screw rods are rotatably mounted on the fixed frame through the first bearing seats; the problem of among the feed screw nut transmission process, because there is the positioning accuracy low and feed screw nut itself to have the clearance after stopping and lead to positioning error great, some high accuracy location transmission occasions exist the unable condition of being suitable for is solved.)

1. The high-precision screw nut transmission positioning device comprises a fixing frame (1), a driving assembly (2), a transmission assembly (3) and a load assembly (4), and is characterized in that the driving assembly (2) is mounted on the fixing frame (1), and the transmission assembly (3) is driven to work through the driving assembly (2) to drive the load assembly (4) to move;

the transmission assembly (3) comprises a transmission shaft (31), a driving bevel gear (32), a driven bevel gear (33), a first bearing seat (34), a second bearing seat (35), a screw rod (36) and a nut (37); two output ends of drive assembly (2) are connected with transmission shaft (31), pass through on mount (1) primary shaft seat (34) are rotated and are installed transmission shaft (31), the tip of transmission shaft (31) is equipped with initiative conical gear (32), pass through on mount (1) primary shaft seat (34) are rotated and are installed lead screw (36), the upper end of lead screw (36) is equipped with driven conical gear (33), initiative conical gear (32) with mesh mutually between driven conical gear (33), the screw thread department threaded connection of lead screw (36) has nut (37).

2. A high precision screw nut transmission positioning device according to claim 1, characterized in that the driving assembly (2) comprises a driving motor (21) and a double-shaft reduction gearbox (22); the output end of the driving motor (21) is connected with the input end of the double-shaft reduction box (22), and the two output ends of the double-shaft reduction box (22) are connected with the driving end of the transmission assembly (3).

3. A high precision screw nut transmission positioning device according to claim 2, characterized in that the driving motor (21) is a three-phase asynchronous motor.

4. A high precision feed screw nut transmission positioning device according to claim 1, characterized in that the bearings in the first bearing seat (34) and the second bearing seat (35) are needle bearings or ball bearings.

5. The high-precision feed screw nut transmission positioning device according to claim 1, wherein the upper and lower parts of the nut (37) comprise symmetrically arranged cone frustum parts (38) which are integrally formed, and screw holes which are in threaded fit with the feed screw (36) are formed at the axial parts of the nut (37) and the two cone frustum parts (38).

6. The high-precision feed screw nut transmission positioning device according to claim 5, wherein the inner side end faces of the second bearing seats (35) on the upper and lower sides are provided with frustum cone holes (39), and the frustum cone holes (39) are matched with the frustum cone parts (38) for sliding insertion.

7. A high precision feed screw nut transmission positioning device according to claim 6, characterized in that the cone angle of the cone frustum hole (39) is 45-60 °.

8. A high-precision feed screw nut transmission positioning device as claimed in claim 6, characterized in that the wall of the conical hole of the conical frustum (39) and the wall of the conical surface of the conical frustum are coated with wear-resistant coatings.

9. The high-precision feed screw nut transmission positioning device according to claim 8, wherein the wear-resistant coating is a cobalt-nickel alloy wear-resistant layer with a thickness of 60-80 um.

10. A high precision lead screw nut transmission positioning device according to claim 1, characterized in that the load assembly (4) comprises a mounting plate (41) and a load member (42); the left end and the right end of the mounting plate (41) are detachably connected with the nuts (37) through bolts respectively, and the middle of the bottom of the mounting plate (41) is provided with the load piece (42).

Technical Field

The invention relates to the technical field of screw nut transmission, in particular to a high-precision screw nut transmission positioning device.

Background

The lifting screw rod nut transmission mechanism device converts rotary motion into linear motion, is the most commonly used transmission element on tool machinery and precision machinery, and has the characteristics of high precision, reversibility and high efficiency. The lifting screw nut transmission mechanism works to drive the load part loaded on the lifting screw nut transmission mechanism to lift and move.

However, in the prior art, in the transmission process of the screw nut, because the positioning accuracy is low after the screw nut is stopped and the positioning error is large due to the gap of the screw nut, some situations of high-accuracy positioning transmission exist, which cannot be applied, and therefore, the research and development of a high-accuracy screw nut transmission positioning device are urgently needed to solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a high-precision screw nut transmission positioning device, which solves the problems that in the screw nut transmission process, due to the low positioning precision after stopping and the large positioning error caused by the gap of the screw nut, the high-precision screw nut transmission positioning device cannot be applied to some high-precision positioning transmission occasions.

The invention is realized by the following technical scheme:

the high-precision screw nut transmission positioning device comprises a fixing frame, a driving assembly, a transmission assembly and a load assembly, wherein the driving assembly is mounted on the fixing frame, and the driving assembly drives the transmission assembly to work to drive the load assembly to move;

the transmission assembly comprises a transmission shaft, a driving conical gear, a driven conical gear, a first bearing seat, a second bearing seat, a lead screw and a nut; two output ends of the driving assembly are connected with the transmission shaft, the transmission shaft is rotatably installed on the fixing frame through the first bearing seat, the end part of the transmission shaft is provided with the driving bevel gear, the fixing frame is provided with the lead screw through the first bearing seat, the upper end of the lead screw is provided with the driven bevel gear, the driving bevel gear is meshed with the driven bevel gear, and the thread part of the lead screw is in threaded connection with the nut.

Preferably, the driving assembly comprises a driving motor and a double-shaft reduction box; the output end of the driving motor is connected with the input end of the double-shaft reduction gearbox, and the two output ends of the double-shaft reduction gearbox are connected with the driving end of the transmission assembly.

Preferably, the driving motor is a three-phase asynchronous motor.

Preferably, the bearings in the first bearing seat and the second bearing seat are needle roller bearings or ball bearings.

Preferably, the upper and lower parts of the nut comprise cone frustum parts which are symmetrically formed in an integrated manner, and screw holes which are in threaded fit with the screw rod are formed in the axial positions of the nut and the two cone frustum parts.

Preferably, the inner side end faces of the second bearing seats on the upper side and the lower side are provided with conical table holes, and the conical table holes are matched with the conical table portions and are in sliding insertion connection.

Preferably, the conical angle of the conical frustum hole is 45-60 degrees.

Preferably, the wall of the conical hole of the conical frustum and the wall of the conical surface of the conical frustum are both plated with wear-resistant coatings.

Preferably, the wear-resistant coating adopts a cobalt-nickel alloy wear-resistant layer with the thickness of 60-80 um.

Preferably, the load assembly comprises a mounting plate and a load member; the left end and the right end of the mounting plate are detachably connected with the nuts through bolts respectively, and the middle of the bottom of the mounting plate is provided with the load piece.

The invention has the beneficial effects that:

under the design and the use of the structure, the abutting contact position of the nut and the second bearing seat is matched in a conical surface and conical hole mode when the nut is contacted with the second bearing seat through the arrangement of the conical surface hole and the conical surface part, and when the nut on the transmission assembly is transmitted to be contacted with the second bearing seat, the axial clearance error and the radial clearance error of the screw rod nut are eliminated through the matching of the conical surface and the conical hole, so that the zero clearance matching is ensured, and the high-precision transmission and positioning requirements are met;

the invention has novel structure, reasonable design and strong practicability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a view of the nut of the present invention as it is moved into abutment with the second bearing housing;

fig. 3 is an enlarged view of a structure a in the present invention.

In the figure: 1-a fixed frame, 2-a driving component, 21-a driving motor, 22-a double-shaft reduction box, 3-a transmission component, 31-a transmission shaft, 32-a driving conical gear, 33-a driven conical gear, 34-a first bearing seat, 35-a second bearing seat, 36-a screw rod, 37-a nut, 38-a cone table part, 39-a cone table hole, 4-a loading component, 41-an installation plate and 42-a loading component.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the embodiment specifically discloses a technical solution for providing a high-precision screw nut transmission positioning device, which includes a fixed frame 1, a driving component 2, a transmission component 3 and a load component 4, wherein the fixed frame 1 is provided with the driving component 2, and the driving component 2 drives the transmission component 3 to work to drive the load component 4 to move;

the transmission assembly 3 comprises a transmission shaft 31, a driving bevel gear 32, a driven bevel gear 33, a first bearing seat 34, a second bearing seat 35, a screw rod 36 and a nut 37; two output ends of the driving assembly 2 are connected with a transmission shaft 31, the transmission shaft 31 is rotatably installed on the fixed frame 1 through a first bearing seat 34, a driving bevel gear 32 is arranged at the end part of the transmission shaft 31, a lead screw 36 is rotatably installed on the fixed frame 1 through the first bearing seat 34, a driven bevel gear 33 is arranged at the upper end of the lead screw 36, the driving bevel gear 32 is meshed with the driven bevel gear 33, and a nut 37 is in threaded connection with the threaded part of the lead screw 36. When the transmission assembly 3 is used specifically, the driving assembly 2 is driven to provide driving force to drive the transmission shaft 31 to rotate, the driving bevel gear 32 and the driven bevel gear 33 are meshed for transmission, the lead screw 36 is synchronously driven to rotate, and the load assembly 4 is synchronously driven to move under the transmission action of the thread force between the lead screw 36 and the nut 37.

In addition, the stability of the transmission shaft 31 and the lead screw during transmission is further improved by the arrangement of the first bearing seat 34 and the second bearing seat 35.

Specifically, the driving assembly 2 comprises a driving motor 21 and a double-shaft reduction box 22; the output end of the driving motor 21 is connected with the input end of the double-shaft reduction box 22, and two output ends of the double-shaft reduction box 22 are connected with the driving end of the transmission component 3. When the driving assembly 2 is used, the driving motor 21 provides power for the double-shaft reduction gearbox 22, and the power is stably output to the transmission shaft 31 through the reduction of the double-shaft reduction gearbox 22.

Specifically, the driving motor 21 is a three-phase asynchronous motor, which facilitates controlling the rotation speed of the driving motor 21 during rotation.

Specifically, the bearings in the first bearing seat 34 and the second bearing seat 35 are needle roller bearings or ball bearings.

Specifically, the upper and lower portions of the nut 37 include symmetrically-formed cone-shaped table portions 38, and screw holes in threaded engagement with the lead screw 36 are formed in the axial direction of the nut 37 and the two cone-shaped table portions 38. The inner side end faces of the second bearing seats 35 on the upper side and the lower side are provided with conical platform holes 39, and the conical platform holes 39 are matched with the conical platform part 38 in a sliding insertion mode. Through the arrangement of the conical platform hole 39 and the conical platform part 38, when the nut 37 is in contact with the second bearing seat 35, the abutting contact part of the nut 37 and the second bearing seat 35 is matched in a conical surface and conical hole mode, when the nut 37 on the transmission assembly 3 is transmitted to be in contact with the second bearing seat 35, the axial clearance error and the radial clearance error of the screw rod 36 and the nut 37 are eliminated through the conical surface and conical hole matching, the zero clearance matching is ensured, and the high-precision transmission and positioning requirements are met.

Specifically, the cone angle of the cone frustum hole 39 is 45-60 degrees, and the requirements of high-precision transmission and positioning are further met.

Specifically, the wall of the conical hole 39 and the wall of the conical surface of the conical frustum are coated with wear-resistant coatings, so that the wear resistance of the nut 37 and the second bearing seat 35 during matching is further improved.

Specifically, the wear-resistant coating adopts a cobalt-nickel alloy wear-resistant layer with the thickness of 60-80 um.

Specifically, the load assembly 4 includes a mounting plate 41 and a load member 42; the left end and the right end of the mounting plate 41 are detachably connected with the nut 37 through bolts, and a load member 42 is arranged in the middle of the bottom of the mounting plate 41.

Under the design and the use of the structure, the abutting contact position of the nut 37 and the second bearing seat 35 is matched in a conical surface and conical hole mode when the nut 37 is in contact with the second bearing seat 35 through the arrangement of the conical hole 39 and the conical part 38, and when the nut 37 on the transmission assembly 3 is transmitted to be in contact with the second bearing seat 35, the axial clearance error and the radial clearance error of the nut 37 of the lead screw 36 are eliminated through the conical surface and conical hole matching, so that the gapless matching is ensured, and the high-precision transmission and positioning requirements are met.

The control mode of the electrical components is controlled by a single chip microcomputer or a PLC (programmable logic controller) of a control terminal matched with the control mode, and a control circuit can be realized by simple programming of technical personnel in the field, which belongs to the common knowledge in the field, only uses the control circuit without improving the control circuit, and the control circuit is mainly used for protecting a mechanical device, so the control mode and the circuit connection are not described in detail in the invention.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.