High-precision curved surface feeding mechanism

Abstract

The utility model provides a high-precision curved surface feeding mechanism which comprises an electric main shaft, a crank assembly is arranged at the output end of the electric main shaft in a sleeved mode, and the crank assembly drives the electric main shaft to rotate eccentrically. The output end of the motorized spindle rotates and is matched with eccentric motion driven by the crank assembly, so that the vibration strength of feeding is reduced, the service life of the motorized spindle is prolonged, and stable high-precision curved surface feeding is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of mechanical precision machining especially relates to a high-precision curved surface feeding mechanism. BACKGROUND

[0002] In the traditional grinding machine processing, the processing of curved surface often has problems such as insufficient precision and low efficiency. When processing complex curved surface, the ordinary grinding machine is difficult to realize accurate curved surface contour control due to the limitation of its feeding system, resulting in a large deviation between the processed curved surface and the design requirement, which cannot meet the processing requirement of high-precision parts.

[0003] Chinese patent CN207387325U discloses a numerical control grinding machine for processing complex curved surface, which comprises a base, a workbench, a Z-axis stand, a grinding wheel, a grinding wheel shaft and a finished product conveying device, and further comprises a pair of drag plates for controlling the front and back movement of a workpiece and a pair of drag plates for controlling the left and right movement of the workpiece; the two pairs of drag plates are perpendicular to each other and constitute X-axis and Y-axis respectively, a workpiece supporting and rotating device, a compression wheel and a workpiece positioning rod are used to fix the workpiece on the Z-axis for up and down movement, the two drag plates are used for front and back movement, and the movement of the workpiece on the X-axis and Y-axis is controlled, and the processing of the curved surface is finally completed through numerical control programming control of the movement of the grinding wheel and the workpiece.

[0004] However, the technical scheme has the following disadvantages: the linear motion parts of the X-axis and Y-axis may deviate from the straight line after long-time operation, resulting in a non-straight motion track, which may cause position deviation of the tool or processing tool during the feeding process, and further affect the shape precision of the curved surface. Since the X-axis and Y-axis need to change the movement direction constantly, the acceleration and deceleration process is required at each direction change, which reduces the processing efficiency. SUMMARY

[0005] The utility model discloses a high-precision curved surface feeding mechanism to solve the technical problem of the prior art, and the utility model discloses the following technical scheme: a high-precision curved surface feeding mechanism, including electric spindle, the output of electric spindle is equipped with crank assembly, the crank assembly drives eccentric rotation motion of electric spindle, the output of electric spindle is self-rotating, and the eccentric motion driven by the crank assembly is cooperated, the vibration intensity of feeding is reduced, the service life of electric spindle is prolonged, and stable high-precision curved surface feeding is realized.

[0006] To achieve the above object, the utility model provides the following technical scheme: a high-precision curved surface feeding mechanism, including electric spindle, characterized in that, the output of electric spindle is equipped with crank assembly, the crank assembly drives eccentric rotation motion of electric spindle, the output of electric spindle is self-rotating, and the eccentric motion driven by the crank assembly is cooperated, realizing high-precision curved surface feeding.

[0007] As a preferred embodiment, the crank assembly includes a fixed base with a mounting hole, a first bearing rotatably disposed in the mounting hole, and an eccentric component rotatably disposed on the first bearing.

[0008] As a preferred embodiment, a housing is provided on one side of the fixed base, an end cover is provided on the housing, a driving component is installed on the end cover, a driving gear is sleeved on the output shaft of the driving component, the driving gear meshes with a driven gear, the driven gear is fixedly installed and coaxially arranged with the eccentric component, and the driving component drives the eccentric component to rotate through gear transmission.

[0009] As a preferred embodiment, the end cover and the driven gear are provided with through holes, the electric spindle is located in the through holes and the trajectory of the eccentric movement of the electric spindle is smaller than the diameter of the through holes.

[0010] As a preferred embodiment, the eccentric component is provided with an eccentric hole, and a second bearing is provided in the eccentric hole. The second bearing is sleeved on the side of the electric spindle output end away from the end face, and the rotation of the eccentric component drives the electric spindle to rotate eccentrically.

[0011] As a preferred embodiment, a sliding groove is provided on the other side of the fixing base, and a slider is slidably disposed on the sliding groove.

[0012] As a preferred embodiment, the slider has an elliptical groove, in which a third bearing is disposed, and the third bearing is sleeved on the side of the output end of the electric spindle near the end face.

[0013] As a preferred embodiment, the third bearing is slidably disposed within the elliptical groove.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model drives the electric spindle to perform eccentric rotation by means of the crank assembly, and rotates in conjunction with the output end of the electric spindle to achieve surface feeding, thereby avoiding straightness deviation after long-term operation and improving the accuracy of surface processing.

[0016] (2) By setting a slider with an elliptical groove, the electric spindle drives the slider to move up and down when it performs eccentric motion, which reduces the vibration intensity during the feeding process, extends the service life of the electric spindle, and improves production efficiency.

[0017] (3) By setting the third bearing to rotate and slide in the elliptical groove, this utility model realizes that the outer raceway of the third bearing is subjected to uniform force on multiple sides, which increases the service life of the third bearing, can also effectively prevent the electric spindle from vibrating, and improves the stability during feeding.

[0018] In summary, this utility model has the advantages of high precision, high efficiency, and high stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial schematic diagram of the present invention;

[0021] Figure 3 This is a partial schematic diagram of the present invention;

[0022] Figure 4 This is a partial schematic diagram of the present invention;

[0023] Figure 5 This is a partial schematic diagram of the present invention;

[0024] Figure 6 This is a partial schematic diagram of the present invention;

[0025] Figure 7 This is a partial schematic diagram of the present invention;

[0026] Figure 8 This is a schematic diagram of the operation of this utility model. Figure 1 ;

[0027] Figure 9 This is a schematic diagram of the operation of this utility model. Figure 2 . Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Example 1

[0031] like Figures 1 to 9 As shown, this embodiment provides a high-precision curved surface feed mechanism, including an electric spindle 1. A crank assembly 2 is sleeved on the output end of the electric spindle 1. The crank assembly 2 drives the electric spindle 1 to perform eccentric rotation. The output end of the electric spindle 1 rotates on its own axis, and in conjunction with the eccentric motion driven by the crank assembly 2, high-precision curved surface feed is achieved.

[0032] It should be noted that the crank assembly 2 drives the electric spindle 1 to perform eccentric rotation, which, in conjunction with the output end of the electric spindle 1, rotates to achieve surface feed. This avoids straightness deviations after prolonged operation and improves the accuracy of surface machining.

[0033] like Figure 2 As shown, the crank assembly 2 includes a fixed seat 21, on which a mounting hole 211 is provided, and a first bearing 11 is rotatably disposed in the mounting hole 211, and an eccentric member 22 is rotatably disposed on the first bearing 11.

[0034] It should be noted that the eccentric component 22 is stepped, the inner raceway of the first bearing 11 is sleeved on the small end of the eccentric component 22, the outer raceway of the first bearing 11 is rotatably disposed in the mounting hole 211, and the mounting hole is provided on one side of the large end of the eccentric component 22.

[0035] like Figure 3 , 4As shown, a housing 23 is provided on one side of the fixed base 21, and an end cover 231 is provided on the housing. A driving member 24 is installed on the end cover 231. A driving gear 25 is sleeved on the output shaft of the driving member 24. The driving gear 25 meshes with a driven gear 26. The driven gear 26 is fixedly installed and coaxially arranged with the eccentric member 22. The driving member 24 drives the eccentric member 22 to rotate through gear transmission.

[0036] It should be noted that the large end of the eccentric component 22 is fixedly installed with the driven gear 26 through a fixing component. The output shaft of the driving component 24 drives the driving gear 25 to rotate. The driving gear 25 meshes and drives the driven gear 26 to rotate. The eccentric component 22 rotates with the driven gear 26.

[0037] like Figure 5 As shown, the end cover 231 and the driven gear 26 are provided with through holes 261, the electric spindle 1 is located in the through hole 261 and the trajectory of the eccentric movement of the electric spindle 1 is smaller than the diameter of the through hole 261.

[0038] It should be noted that through holes 261 are provided on the end cover 231 and the driven gear 26, and the diameter of the holes is larger than the trajectory of the eccentric movement of the electric spindle 1, so as to avoid interference when the electric spindle 1 moves eccentrically, and at the same time, it can also play a certain role in dust prevention.

[0039] like Figure 6 As shown, the eccentric component 22 is provided with an eccentric hole 221, and a second bearing 12 is provided in the eccentric hole 221. The second bearing 12 is sleeved on the side of the output end of the electric spindle 1 away from the end face. The rotation of the eccentric component 22 drives the electric spindle 1 to rotate eccentrically.

[0040] It should be noted that the inner raceway of the second bearing 12 is sleeved on the output end of the electric spindle 1, and its outer raceway is rotatably set in the eccentric hole 221, so that the output end can also rotate while the electric spindle 1 is driven to rotate eccentrically.

[0041] like Figure 7 As shown, a sliding groove 212 is provided on the other side of the fixed base 21, and a slider 27 is slidably disposed on the sliding groove 212.

[0042] It should be noted that the groove direction of the slide 212 is parallel to the long side direction of the fixed seat 21, and the long side direction of the slider 27 is parallel to the long side direction of the fixed seat 21.

[0043] like Figure 8 , 9 As shown, the slider 27 has an elliptical groove 271, in which a third bearing 13 is provided. The third bearing 13 is sleeved on the side of the output end of the electric spindle 1 near the end face.

[0044] It should be noted that the inner raceway of the third bearing 13 is sleeved on the output end of the electric spindle 1, and its outer raceway is rotatably set in the elliptical groove 271. When the electric spindle 1 performs eccentric motion, it drives the slider 27 to move up and down, which reduces the vibration intensity during the feeding process and extends the service life of the electric spindle 1.

[0045] like Figure 8 , 9 As shown, the third bearing 13 is slidably disposed in the elliptical groove 271.

[0046] It should be noted that the third bearing 13 rotates and slides in the elliptical groove 271, which realizes that the outer raceway of the third bearing 13 is subjected to uniform force on multiple surfaces, increases the service life of the third bearing 13, and can also effectively prevent the electric spindle 1 from vibrating, thus improving the stability during feeding.

[0047] Work steps

[0048] The output shaft of the drive component 24 drives the drive gear 25 to rotate, and the drive gear 25 meshes with and drives the driven gear 26 to rotate. The eccentric component 22 rotates with the driven gear 26, and the electric spindle 1 is driven by the eccentric component 22 to rotate eccentrically. At the same time, its output end rotates. When the electric spindle 1 is performing eccentric motion, it drives the slider 27 to move up and down. At the same time, the output end of the electric spindle 1 also slides in the elliptical groove 271.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-precision curved surface feeding mechanism comprising an electric spindle, characterized in that, The crank assembly is sleeved on the output end of the electric spindle, and drives the electric spindle to perform eccentric rotation; The output end of the electric spindle rotates, and cooperates with the eccentric motion driven by the crank assembly to realize high-precision curved surface feeding.

2. A high-precision curved surface feeding mechanism according to claim 1, characterized in that, The crank assembly comprises a fixed seat, an installation hole is formed in the fixed seat, a first bearing is rotatably arranged in the installation hole, and an eccentric part is rotatably arranged on the first bearing.

3. A high-precision curved surface feeding mechanism according to claim 2, characterized in that, One side of the fixed seat is provided with a shell, an end cover is arranged on the shell, a driving part is mounted on the end cover, a driving gear is sleeved on the output shaft of the driving part, a driven gear is engaged with the driving gear, the driven gear is fixedly installed and coaxially arranged with the eccentric part, and the driving part drives the eccentric part to rotate through gear transmission.

4. A high-precision curved surface feeding mechanism according to claim 3, characterized in that, Holes are formed in the end cover and the driven gear, the electric spindle is located in the holes, and the track of the eccentric motion of the electric spindle is smaller than the hole diameter of the holes.

5. The high-precision curved surface feeding mechanism according to claim 2, wherein An eccentric hole is arranged on the eccentric part, a second bearing is arranged in the eccentric hole, the second bearing is sleeved on the side of the output end of the electric spindle away from the end face, and the eccentric part drives the electric spindle to perform eccentric rotation.

6. The high-precision curved surface feeding mechanism according to claim 2, wherein The other side of the fixed seat is provided with a sliding groove, and a sliding block is slidably arranged on the sliding groove.

7. A high-precision curve-feeding mechanism according to claim 6, characterized in that, An elliptical groove is formed in the sliding block, a third bearing is arranged in the elliptical groove, and the third bearing is sleeved on the side of the output end of the electric spindle close to the end face.

8. A high-precision curve-feeding mechanism according to claim 7, characterized in that, The third bearing is slidably arranged in the elliptical groove.

Images