Force-control flexible precision positioning unit

Abstract

The utility model discloses a force control flexible precision positioning unit which comprises a main seat body, a driving and control integrated stepping motor, a lead screw transmission assembly, a belt transmission assembly, a cover cap and a positioning sliding table. A through cylinder cavity penetrating through the front end face and the rear end face of the main seat body is formed in one side of the main seat body, and an embedded cavity adjacent to the rear end face of the main seat body is formed in the other side of the main seat body. The driving and control integrated stepping motor is mounted in the embedding cavity; the lead screw transmission assembly is installed in the through cylinder cavity. The belt transmission assembly is arranged between the driving end of the driving and control integrated stepping motor and the transmission end of the lead screw transmission assembly. The cover cap covers the rear end face of the main seat body; the positioning sliding table comprises a guide plate arranged above the main seat body and a positioning plate arranged in front of the main seat body, and a linear guide rail is arranged between the guide plate and the main seat body; the upper portion of the positioning plate is connected with the front end of the guide plate, and the lower portion of the positioning plate is connected with the driving end of the lead screw transmission assembly. According to the utility model, accurate reciprocating positioning motion can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning systems, in particular to a force-controlled flexible precision positioning unit. Background Art

[0002] With the development of industries such as semiconductors, microelectronics, biomedicine, and precision measurement, the demand for high-precision, high-stability linear motion control is growing. Positioning systems play a critical role in various precision mechanical equipment. These devices require planar reciprocating positioning motion, which requires precise positioning of the platform with high speed and frequent starts and stops. While maintaining the required accuracy, the speed and acceleration must be maximized to shorten machining time, reduce operation time, and effectively improve productivity. However, traditional manual or pneumatic slides cannot meet the precision and automation requirements of these industries. Utility Model Content

[0003] The purpose of the utility model is to provide a force-controlled flexible precision positioning unit.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A force-controlled flexible precision positioning unit comprises a main base, an integrated drive-control stepper motor, a screw transmission assembly, a belt transmission assembly, a cover and a positioning slide; the main base is formed with a through-cylinder cavity passing through its front and rear end faces on one side and an embedded cavity adjacent to its rear end face on the other side; the integrated drive-control stepper motor is installed in the embedded cavity, and the driving end of the integrated drive-control stepper motor passes through the rear end face of the main base; the screw transmission assembly is installed in the through-cylinder cavity, the driving end of the screw transmission assembly passes through the rear end face of the main base, and the driving end of the screw transmission assembly passes through the rear end face of the main base Front end face; the belt drive assembly is arranged between the driving end of the drive-control integrated stepper motor and the driving end of the screw drive assembly; the cover is arranged on the rear end face of the main seat body, and the belt drive assembly is accommodated therein; the positioning slide comprises a guide plate arranged above the main seat body and a positioning plate arranged in front of the main seat body, and a plurality of groups of linear guide rails are arranged between the guide plate and the main seat body; the upper part of the positioning plate is connected to the front end of the guide plate, and the lower part of the positioning plate is connected to the driving end of the screw drive assembly, so that the driving end of the screw drive assembly can be extended and retracted, thereby driving the positioning slide to move forward and backward relative to the main seat body.

[0006] As a further technical solution of the present invention: the screw transmission assembly includes a ball screw, a deep groove ball bearing, a ball screw nut and a piston rod; the deep groove ball bearing is fixedly installed at the rear end of the through cylinder cavity; the ball screw can be rotatably installed in the through cylinder cavity through the deep groove ball bearing, the rod head of the ball screw passes through the deep groove ball bearing to the rear end face of the main seat body, and the spiral section of the ball screw passes into the piston rod; the ball screw nut and the piston rod can be installed in the through cylinder cavity so as to advance and retreat relative to the ball screw, and the ball screw nut is sleeved on the spiral section of the ball screw; the rear end of the piston rod is fixedly sleeved on the front end of the ball screw nut, and the front end of the piston rod passes through the through cylinder cavity to the front end face of the main seat body and is connected to the lower part of the positioning plate, for the ball screw to rotate, driving the ball screw nut and the piston rod to advance and retreat relative to the ball screw.

[0007] As a further technical solution of the present invention: a screw limit block is installed on the front end of the ball screw.

[0008] As a further technical solution of the present invention: the cover is formed with a connecting cavity and a receiving cavity in the front and rear recesses of its front end surface, and a connecting plate is installed in the connecting cavity, which is screwed to the integrated drive and control stepper motor, the rear end surface of the main seat body and the cover respectively; the receiving cavity is used to accommodate the belt drive assembly.

[0009] As a further technical solution of the present invention: the belt transmission assembly includes a driving wheel, a driven wheel and a belt body, the driving wheel is installed on the driving end of the drive-control integrated stepper motor, the driven wheel is installed on the rod head of the ball screw, and the belt body is mounted on the driving wheel and the driven wheel.

[0010] As a further technical solution of the present invention: two sections of ribs are provided on both sides of the bottom surface of the guide plate, and several groups of linear guide rails are arranged between the two sections of ribs; each linear guide rail includes a guide rail body fixed on the bottom surface of the guide plate and a slider slidably arranged on the guide rail body, and the slider is connected to the main seat body.

[0011] As a further technical solution of the present invention: a limit block is installed on the top surface of the main seat body corresponding to a retaining edge, and a strip groove for the limit block to penetrate into the bottom of the retaining edge.

[0012] Compared with the existing technology, the beneficial effects of the present invention are: the present invention proposes a force-controlled flexible precision positioning unit which can realize precise reciprocating positioning motion through the cooperation between the main base, the drive-control integrated stepping motor, the screw transmission assembly, the belt transmission assembly, the cover and the positioning slide, achieve micron-level positioning accuracy and effectively reduce the noise and vibration generated during the operation of the system, thereby improving the comfort of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1Schematic diagram of the force-controlled flexible precision positioning unit.

[0014] Figure 2 This is an exploded view of the force-controlled flexible precision positioning unit.

[0015] Figure 3 This is a cross-sectional view of the force-controlled flexible precision positioning unit.

[0016] Figure 4 This is a single-body diagram of the main seat.

[0017] Figure 5 This is a single-body diagram of the guide plate.

[0018] Figure 6 This is a single-body diagram of the cover. DETAILED DESCRIPTION

[0019] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the scope of protection of the present invention.

[0020] See also Figure 1 、 Figure 2 and Figure 3 A force-controlled flexible precision positioning unit includes a main body 10, a drive-control integrated stepper motor 20, a screw drive assembly 30, a belt drive assembly 40, a cover 50 and a positioning slide 60; Figure 4The main seat body 10 is formed with a through-cylinder cavity 11 on one side that passes through its front and rear end faces and an embedded cavity 12 adjacent to its rear end face on the other side; the drive-control integrated stepper motor 20 is installed in the embedded cavity 12, and the driving end of the drive-control integrated stepper motor 20 passes through the rear end face of the main seat body 10; the screw transmission assembly 30 is installed in the through-cylinder cavity 11, and the driving end of the screw transmission assembly 30 passes through the rear end face of the main seat body 10, and the driving end of the screw transmission assembly 30 passes through the front end face of the main seat body 10; the belt transmission assembly 40 is arranged between the driving end of the drive-control integrated stepper motor 20 and the driving end of the screw transmission assembly 30, for the driving end of the drive-control integrated stepper motor 20 to rotate, and the belt transmission assembly 40 drives the transmission end of the screw transmission assembly 30 The moving end rotates together, causing the driving end of the screw transmission assembly 30 to extend and retract; the cover 50 is arranged on the rear end face of the main base body 10, accommodating the belt transmission assembly 40 therein; the positioning slide 60 includes a guide plate 61 arranged above the main base body 10 and a positioning plate 62 arranged in front of the main base body 10, and a plurality of groups of linear guide rails 63 are arranged between the guide plate 61 and the main base body 10, and the setting direction of each linear guide rail 63 is the same as the extension and retraction direction of the driving end of the screw transmission assembly 30; the upper part of the positioning plate 62 is connected to the front end of the guide plate 61, and the lower part of the positioning plate 62 is connected to the driving end of the screw transmission assembly 30, so that the driving end of the screw transmission assembly 30 can extend and retract, driving the positioning slide 60 to advance and retreat relative to the main base body 10, thereby realizing precise reciprocating positioning motion.

[0021] Furthermore, in this embodiment, the screw transmission assembly 30 includes a ball screw 31, a deep groove ball bearing 32, a ball screw nut 33 and a piston rod 34; the deep groove ball bearing 32 is fixedly mounted at the rear end of the through-cylinder cavity 11; the ball screw 31 is rotatably mounted in the through-cylinder cavity 11 through the deep groove ball bearing 32, the rod head of the ball screw 31 passes through the deep groove ball bearing 32 to the rear end surface of the main seat body 10, and the spiral section of the ball screw 31 passes into the piston rod 34; the The ball screw nut 33 and the piston rod 34 can be installed in the through-cylinder cavity 11 so as to advance and retreat relative to the ball screw 31, and the ball screw nut 33 is sleeved on the spiral section of the ball screw 31; the rear end of the piston rod 34 is fixedly sleeved on the front end of the ball screw nut 33, and the front end of the piston rod 34 passes through the through-cylinder cavity 11 to the front end surface of the main seat body 10 and is connected to the lower part of the positioning plate 62, so that the ball screw 31 can rotate, driving the ball screw nut 33 and the piston rod 34 to advance and retreat relative to the ball screw 31.

[0022] Furthermore, in this embodiment, a screw limit block 311 is installed on the front end of the ball screw 31 to control the advance and retreat amplitude of the ball screw nut 33 and the piston rod 34. The advance and retreat amplitude of the integrated stepper motor driver is controlled by control instructions, and the speed and position are controlled in real time. The screw limit block 311 serves as a mechanical limit (extreme position limit).

[0023] Further, in this embodiment, referring to Figure 6 The cover 50 has a connecting cavity 51 and a receiving cavity 52 formed in a front and rear recess on its front end surface. A connecting plate 511 is installed in the connecting cavity 51, and the connecting plate 511 is screwed to the integrated drive and control stepper motor 20, the rear end surface of the main seat body 10 and the cover 50 respectively; the receiving cavity 52 is used to accommodate the belt drive assembly 40.

[0024] Furthermore, in this embodiment, the belt transmission assembly 40 includes a driving wheel 41, a driven wheel 42 and a belt body 43. The driving wheel 41 is installed on the driving end of the drive-control integrated stepper motor 20, the driven wheel 42 is installed on the rod head of the ball screw 31, and the belt body 43 is mounted on the driving wheel 41 and the driven wheel 42.

[0025] Furthermore, in this embodiment, two sections of side ribs 611 are provided on both sides of the bottom surface of the guide plate 61, and several groups of linear guide rails 63 are arranged between the two sections of side ribs 611; each linear guide rail 63 includes a guide rail body 631 fixed on the bottom surface of the guide plate 61 and a slider 632 that can slide on the guide rail body 631, and the slider 632 is connected to the main seat body 10.

[0026] Further, in this embodiment, referring to Figure 5 A limit block 101 is installed on the top surface of the main seat body 10 corresponding to a retaining edge 611. The bottom of the retaining edge 611 is provided with a strip groove 601 for the limit block 101 to penetrate, so as to control the advance and retreat range of the positioning slide 60 relative to the main seat body 10.

[0027] It can be understood that the method of using a force-controlled flexible precision positioning unit of the present invention is as follows: the driving end of the integrated stepper motor 20 is driven to rotate, and the driving end of the screw transmission assembly 30 is driven to rotate with the belt transmission assembly 40. Specifically, under the support of the deep groove ball bearing 32, the ball screw 31 rotates in the through-cylinder cavity 11, driving the ball screw nut 33 and the piston rod 34 to advance and retreat relative to the ball screw 31, so that the driving end of the screw transmission assembly 30, that is, the front end of the piston rod 34, is extended and retracted; and the driving end of the screw transmission assembly 30 is extended and retracted, driving the positioning slide 60 to advance and retreat relative to the main seat body 10, realizing precise reciprocating positioning motion and achieving micron-level positioning accuracy. In this process, the ball screw 31 used improves the transmission efficiency and transmission accuracy, and ensures high-precision positioning under various environmental conditions with a smaller volume; the linear guide 63 and the integrated drive and control stepper motor 20 used, with the low friction and high rigidity of the linear guide 63 and the low noise of the integrated drive and control stepper motor 20, effectively reduce the noise and vibration generated during system operation, and improve the comfort of the working environment.

[0028] To sum up, the utility model is a force-controlled flexible precision positioning unit, which can realize precise reciprocating positioning motion through the cooperation between the main base body 10, the integrated drive and control stepper motor 20, the screw transmission assembly 30, the belt transmission assembly 40, the cover 50 and the positioning slide 60, achieving micron-level positioning accuracy and effectively reducing the noise and vibration generated during system operation, thereby improving the comfort of the working environment.

[0029] As long as it does not violate the creative idea of ​​the present invention, any combination of various different embodiments of the present invention should be regarded as the content disclosed by the present invention; within the technical concept of the present invention, any simple modification of the technical solution and any combination of different embodiments that do not violate the creative idea of ​​the present invention should be within the protection scope of the present invention.

Claims

1. A force-controlled flexible precision positioning unit, characterized by: The invention comprises a main seat (10), a drive-control integrated stepper motor (20), a screw transmission assembly (30), a belt transmission assembly (40), a cover (50) and a positioning slide (60); the main seat (10) is formed with a through-cylinder cavity (11) passing through the front and rear end faces thereof on one side and an embedded cavity (12) adjacent to the rear end face thereof on the other side; the drive-control integrated stepper motor (20) is installed in the embedded cavity (12), and the driving end of the drive-control integrated stepper motor (20) passes through the rear end face of the main seat (10); the screw transmission assembly (30) is installed in the through-cylinder cavity (11), the driving end of the screw transmission assembly (30) passes through the rear end face of the main seat (10), and the driving end of the screw transmission assembly (30) passes through the front end face of the main seat (10); the belt transmission assembly (40) is installed in the through-cylinder cavity (11), the driving end of the screw transmission assembly (30) passes through the rear end face of the main seat (10), and the driving end of the screw transmission assembly (30) passes through the front end face of the main seat (10); the belt transmission assembly (40) is installed in the through-cylinder cavity (11), the driving end of the screw transmission assembly (30) passes through the rear end face of the main seat (10), and the driving end of the screw transmission assembly (30) passes through the front end face of the main seat (10); The assembly (40) is arranged between the driving end of the drive-control integrated stepper motor (20) and the driving end of the screw transmission assembly (30); the cover (50) is arranged on the rear end surface of the main seat body (10) to accommodate the belt transmission assembly (40) therein; the positioning slide (60) includes a guide plate (61) arranged above the main seat body (10) and a positioning plate (62) arranged in front of the main seat body (10), and a plurality of groups of linear guide rails (63) are arranged between the guide plate (61) and the main seat body (10); the upper part of the positioning plate (62) is connected to the front end of the guide plate (61), and the lower part of the positioning plate (62) is connected to the driving end of the screw transmission assembly (30), so that the driving end of the screw transmission assembly (30) can be extended and retracted, thereby driving the positioning slide (60) to move forward and backward relative to the main seat body (10).

2. The force-controlled flexible precision positioning unit according to claim 1, characterized in that: The screw transmission assembly (30) comprises a ball screw (31), a deep groove ball bearing (32), a ball screw nut (33) and a piston rod (34); the deep groove ball bearing (32) is fixedly mounted at the rear end of the through-tube cavity (11); the ball screw (31) is rotatably mounted in the through-tube cavity (11) via the deep groove ball bearing (32); the rod head of the ball screw (31) passes through the deep groove ball bearing (32) to the rear end surface of the main seat (10), and the spiral section of the ball screw (31) passes into the piston rod (34); the ball screw nut ( The ball screw nut (33) and the piston rod (34) are installed in the through-cylinder cavity (11) so as to be able to advance and retreat relative to the ball screw (31), and the ball screw nut (33) is sleeved on the spiral section of the ball screw (31); the rear end of the piston rod (34) is fixedly sleeved on the front end of the ball screw nut (33), and the front end of the piston rod (34) passes through the through-cylinder cavity (11) to the front end surface of the main seat body (10) and is connected to the lower part of the positioning plate (62), so as to allow the ball screw (31) to rotate and drive the ball screw nut (33) and the piston rod (34) to advance and retreat relative to the ball screw (31).

3. The force-controlled flexible precision positioning unit according to claim 2, characterized in that: A screw stop block (311) is installed on the front end of the ball screw (31).

4. The force-controlled flexible precision positioning unit according to claim 1, characterized in that: The cover (50) has a connecting cavity (51) and a receiving cavity (52) formed in a front and rear recess on its front end surface. A connecting plate (511) is installed in the connecting cavity (51). The connecting plate (511) is screwed to the drive-control integrated stepper motor (20), the rear end surface of the main seat (10) and the cover (50) respectively; the receiving cavity (52) is used to accommodate the belt transmission assembly (40).

5. The force-controlled flexible precision positioning unit according to claim 2, characterized in that: The belt transmission assembly (40) comprises a driving wheel (41), a driven wheel (42) and a belt body (43). The driving wheel (41) is mounted on the driving end of the drive-control integrated stepper motor (20), the driven wheel (42) is mounted on the rod head of the ball screw (31), and the belt body (43) is sleeved onto the driving wheel (41) and the driven wheel (42).

6. The force-controlled flexible precision positioning unit according to claim 1, characterized in that: Two sections of ribs (611) are provided on opposite sides of the bottom surface of the guide plate (61), and a plurality of groups of linear guide rails (63) are provided between the two sections of ribs (611); each linear guide rail (63) comprises a guide rail body (631) fixed on the bottom surface of the guide plate (61) and a slider (632) slidably provided on the guide rail body (631), and the slider (632) is connected to the main seat (10).

7. The force-controlled flexible precision positioning unit according to claim 6, characterized in that: A limiting block (101) is installed on the top surface of the main seat body (10) corresponding to a retaining edge (611), and a strip groove (601) for the limiting block (101) to penetrate is provided at the bottom of the retaining edge (611).

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