Numerical control vertical movement positioning device

Abstract

The utility model discloses a numerical control vertical moving positioning device, and belongs to the technical field of numerical control moving positioning equipment. Comprising a vertical shell, a driving device and a linear motion mechanism, a mounting cavity is formed in the upper portion of the vertical shell, a bearing plate is arranged on the lower portion of the mounting cavity, and a bearing rotating bearing is arranged on the bearing plate; the linear motion mechanism comprises a screw rod, a linear motion seat and a slide rail, the vertical lower part of the screw rod is inserted into the rotating bearing and rotates relative to the bearing plate, the linear motion seat is screwed on the screw rod, the slide rail is vertically arranged on one side of the mounting cavity, and the side part of the linear motion seat is clamped on the slide rail in a sliding manner; the driving device drives the screw rod to rotate; the technical problems that in a traditional numerical control movable positioning linear shaft moving in the vertical direction, due to the fact that a bearing seat is arranged, a bolt is subjected to the shearing force effect, the movable positioning precision is lowered, reliability is lowered, and even faults occur are solved.

Description

Technical Field

[0001] This utility model relates to the field of CNC mobile positioning equipment technology, and in particular to a CNC vertical mobile positioning device. Background Technology

[0002] A CNC linear positioning device is a servo motion mechanism directly controlled by the NC system in a CNC system. It can be used for workpiece movement and positioning, with typical applications including linear axes (X / Y / Z) or rotary axes (A / B / C) in machining centers. Traditional vertical CNC linear positioning axes often use lead screws and lead screw-slider structures to provide linear motion. Bearing seats are located at both ends of the lead screw, which are fixed to the housing by horizontal bolts. This results in a load acting on the lead screw-slider structure, and the forces from the lead screw-slider structure and the load act on the bearing seats and the horizontally positioned bolts, causing the bolts to experience vertical shear forces. In the automated machining of automotive white models, the workpiece needs to be mounted on a traditional CNC linear positioning axis for movement and positioning. The load acting on the CNC linear positioning axis during workpiece movement is a dynamic load. The combined effect of the additional forces exerted on the workpiece after it reaches its position and during machining is a static load, which is generally greater than the dynamic load. Due to the alternating effects of dynamic and static loads, bolts subjected to shear force may loosen or deform, resulting in a decrease in the positioning accuracy and reliability of the vertical CNC linear axis, or even malfunction. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by providing a CNC vertical moving positioning device, which solves the technical problem that the use of bearing seats in traditional CNC moving positioning linear axes with vertical movement causes bolts to be subjected to shear forces, resulting in decreased moving positioning accuracy, decreased reliability, or even failure.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A CNC vertical motion positioning device includes a vertical housing, a drive unit, and a linear motion mechanism. The upper part of the vertical housing has a mounting cavity, and the lower part of the mounting cavity has a load-bearing plate. A load-bearing rotary bearing is mounted on the load-bearing plate. The linear motion mechanism includes a lead screw, a linear motion seat, and a slide rail. The lead screw is vertically disposed within the mounting cavity, with its upper end rotatably connected to the vertical housing. The lower vertical part of the lead screw is inserted into the rotary bearing and rotates relative to the load-bearing plate. The linear motion seat is screwed onto the lead screw. The slide rail is vertically disposed on one side of the mounting cavity, and the side portion of the linear motion seat is slidably engaged with the slide rail. The drive unit drives the lead screw to rotate.

[0006] Furthermore, the load-bearing plate is provided with bearing mounting holes, and a stepped ring is provided at the lower part of the bearing mounting holes. The rotating bearing is installed in the bearing mounting holes, and the lower end face of the outer ring of the rotating bearing abuts against the stepped ring.

[0007] Furthermore, the rotating bearing is an angular contact ball bearing.

[0008] Furthermore, a fixing cover is provided on the upper part of the bearing mounting hole, and the lower end face of the fixing cover abuts against the upper end face of the outer ring of the rotating bearing.

[0009] Furthermore, a step is provided at the lower part of the lead screw, and the step abuts against the upper end face of the inner ring of the rotating bearing.

[0010] Furthermore, the step of the lead screw abuts against the upper end face of the inner ring of the rotating bearing via a transition ring.

[0011] Furthermore, an annular buffer pad is fitted onto the lead screw, and the annular buffer pad is located on the upper surface of the fixed cover.

[0012] Furthermore, both sides of the lower part of the vertical housing are provided with mounting flanges, and the lower part of the mounting flanges is provided with several mounting holes.

[0013] Furthermore, the vertical shell, the load-bearing plate, and the seat flange are integrally formed.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows:

[0015] 1. In use, this utility model allows for the installation of a workpiece fixture on the linear motion output end of the linear motion mechanism. A drive device drives the linear motion mechanism, moving the workpiece fixture to the workpiece clamping position. The workpiece to be processed is then mounted on the fixture, moved to the processing station for processing, and finally moved to the removal station, thus completing the processing of one workpiece for use, ready for the next workpiece to be processed in a cycle. The force transmission in this utility model involves the linear motion seat load force being transferred to the lead screw, which in turn acts on a load-bearing rotating bearing, and then through the rotating bearing to the load-bearing plate. The load is effectively transferred to the housing, the ground, or a lower-level moving positioning device via the load-bearing plate. Based on the above, this utility model allows the load force transmission to proceed without any fasteners, greatly improving the rigidity and geometric accuracy of the device. It solves the technical problem of reduced moving positioning accuracy, decreased reliability, or even failure caused by the use of bearing seats in traditional vertical CNC moving positioning linear axes, which results in bolts being subjected to shear forces.

[0016] 2. The stepped ring at the lower part of the bearing mounting hole of this utility model can realize the positioning and installation of the rotating bearing, and the stepped ring can be used for load bearing; the step at the lower part of the lead screw facilitates the fixing and positioning of the lead screw and prevents the lead screw from moving downward along the axial direction; by setting a transition ring, the contact between the step at the lower part of the lead screw and the upper end face of the bearing inner ring can be protected, so as to realize the reliable transmission of the force on the lead screw and improve reliability.

[0017] 3. This utility model, by incorporating an annular buffer pad, can prevent the linear motion seat from directly impacting the rigid structural components in the event of a control malfunction, thus preventing structural damage. The integrated vertical shell, load-bearing plate, and seat flange eliminate the need for fasteners connecting these components, thus preventing any interference from fasteners. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0020] Figure 3 This is a horizontal cross-sectional view of the bottom of this utility model;

[0021] Figure 4 This is a cross-sectional view of the vertical shell portion of this utility model;

[0022] Figure 5 This is a structural diagram of the linear motion seat installation of this utility model;

[0023] In the attached diagram, a1-vertical housing, a2-servo motor, a3-linear motion mechanism, a4-electromagnetic brake, a5-reduction gear, a6-flexible dustproof structure, a7-rotating bearing, a8-wire component, a11-reduction chamber, a12-mounting chamber, a13-load-bearing plate, a14-bearing mounting hole, a15-step ring, a16-vertical groove, a17-foot flange, a21-dust cover, a31-lead screw, a32-linear motion seat, a33-slide rail, a34-slider, a35-annular buffer pad, a61-flexible belt, a62-upper misaligned guide post assembly, a63-lower misaligned guide post assembly, a71-fixed cover, a72-transition ring, a321-yield groove, a322-mounting flange. Detailed Implementation

[0024] The specific implementation of the utility model will be further described below with reference to the accompanying drawings.

[0025] In the description of this utility model, it should be understood that the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Please see Figures 1 to 5A CNC vertical motion positioning device includes a housing, a drive unit, a linear motion mechanism, and a brake. The drive unit is installed inside the housing, the linear motion mechanism is installed on the housing, and the brake is used to brake the drive unit. The drive unit can drive the linear motion mechanism to output linear motion. Specifically, the housing is a vertically arranged vertical housing a1, the drive unit is a servo motor a2, and a reduction chamber a11 is provided at the lower part of the vertical housing a1. Several reduction gears a5 are arranged in the reduction chamber a11, and the reduction gears a5 are rotatably connected to the vertical housing a1. The reduction gears a5 mesh with each other in sequence, and the servo motor a2 drives the linear motion mechanism to move through the several reduction gears a5. A brake is installed at the output end of the servo motor a2, and one end face of the brake is fixedly connected to the vertical housing a1. A wire member a8 is provided on the outside of the vertical housing a1.

[0029] In this embodiment, the upper part of the vertical housing a1 is provided with a mounting cavity a12 opening to one side. The linear motion mechanism is a vertically arranged linear motion mechanism a3, which includes a lead screw a31, a linear motion seat a32, and a slide rail a33. The lead screw a31 is vertically and rotatably arranged in the mounting cavity a12. The linear motion seat a32 is screwed onto the lead screw a31. The slide rail a33 is vertically installed on one side of the mounting cavity a12, and the side of the linear motion seat a32 is slidably engaged with the slide rail a33. Specifically, vertical grooves a16 are provided on both sides of the mounting cavity a12, and slide rails a33 are installed on both sides of the mounting cavity a12. Several sliders a34 are provided on each side of the linear motion seat a32, and both sides of the linear motion seat a32 are slidably engaged with the slide rail a33 through the sliders a34. The linear motion seat a32 has a mounting part extending from the mounting cavity a12 on one side for the weapon. A clearance groove a321 is located in the middle of one side of the mounting part, and mounting flanges for installation are located on both sides of the clearance groove a321. a322.

[0030] In this embodiment, a flexible dustproof structure a6 is provided at the side opening of the mounting cavity a12. Specifically, the flexible dustproof structure a6 includes a flexible belt a61, an upper misaligned guide post assembly a62, and a lower misaligned guide post assembly a63. The flexible belt a61 is tightly sealed at the side opening of the mounting cavity a12. The upper end of the flexible belt a61 is fixedly connected to the upper part of the vertical housing a1, and the lower end of the flexible belt a61 is fixedly connected to the lower part of the vertical housing a1. The upper misaligned guide post assembly a62 is located at the upper end of the linear motion seat a32, and the lower misaligned guide post assembly a63 is located at the lower end of the linear motion seat a32. The upper misaligned guide post assembly a62 includes two upper rotating posts with parallel axes, which are misaligned. The lower misaligned guide post assembly a63 includes two lower rotating posts with parallel axes, which are misaligned. The flexible belt a61 wraps around the upper rotating posts and the lower rotating posts and is attached to the clearance groove a321.

[0031] In this embodiment, both the servo motor a2 and the brake are mounted above the reduction chamber a11. The servo motor a2 is covered by a dust cover a21. The brake is an electromagnetic brake a4; the electromagnetic brake a4 is in a braking state when de-energized and releases the brake when energized.

[0032] In this embodiment, a mounting cavity a12 is provided on the upper part of the vertical housing a1, and a load-bearing plate a13 is provided on the lower part of the mounting cavity a12. A load-bearing rotating bearing a7 is provided on the load-bearing plate a13. The linear motion mechanism a3 includes a lead screw a31, a linear motion seat a32, and a slide rail a33. The lead screw a31 is vertically arranged in the mounting cavity a12, and the upper end of the lead screw a31 is rotatably connected to the vertical housing a1. The lower vertical part of the lead screw a31 is inserted into the rotating bearing a7 and rotates relative to the load-bearing plate a13. The linear motion seat a32 is screwed onto the lead screw a31. The slide rail a33 is vertically installed on one side of the mounting cavity a12, and the side of the linear motion seat a32 is slidably locked onto the slide rail a33. The driving device drives the lead screw a31 to rotate.

[0033] In this embodiment, the load-bearing plate a13 is provided with a bearing mounting hole a14, and a stepped ring a15 is provided at the lower part of the bearing mounting hole a14. The rotating bearing a7 is installed in the bearing mounting hole a14, and the lower end face of the outer ring of the rotating bearing a7 abuts against the stepped ring a15. The rotating bearing a7 is an angular contact ball bearing. A fixing cover a71 is provided at the upper part of the bearing mounting hole a14, and the lower end face of the fixing cover a71 abuts against the upper end face of the outer ring of the rotating bearing a7. A step is provided at the lower part of the lead screw a31, and the step abuts against the upper end face of the inner ring of the rotating bearing a7. The step of the lead screw a31 abuts against the upper end face of the inner ring of the rotating bearing a7 through a transition ring a72. An annular buffer pad a35 is sleeved on the lead screw a31, and the annular buffer pad a35 is located on the upper end face of the fixing cover a71.

[0034] In this embodiment, both sides of the lower part of the vertical shell a1 are provided with foot flanges a17, and the lower part of the foot flanges a17 is provided with several mounting screw holes. The vertical shell a1, the load-bearing plate a13 and the foot flanges a17 are integrally formed. Specifically, the vertical shell a1 is integrally cast.

[0035] The above description is a detailed description of the preferred embodiments of the present utility model. However, the embodiments are not intended to limit the scope of the patent application of the present utility model. All equivalent changes or modifications made under the technical spirit of the present utility model should fall within the patent scope covered by the present utility model.

Claims

1. A CNC vertical moving positioning device, characterized in that: The device includes a vertical housing, a drive unit, and a linear motion mechanism. The upper part of the vertical housing has a mounting cavity, and the lower part of the mounting cavity has a load-bearing plate. A load-bearing rotating bearing is mounted on the load-bearing plate. The linear motion mechanism includes a lead screw, a linear motion seat, and a slide rail. The lead screw is vertically disposed within the mounting cavity, with its upper end rotatably connected to the vertical housing. The lower vertical part of the lead screw is inserted into the rotating bearing and rotates relative to the load-bearing plate. The linear motion seat is screwed onto the lead screw. The slide rail is vertically disposed on one side of the mounting cavity, and the side portion of the linear motion seat is slidably engaged with the slide rail. The drive unit drives the lead screw to rotate.

2. The CNC vertical moving positioning device according to claim 1, characterized in that: The load-bearing plate is provided with bearing mounting holes, and a stepped ring is provided at the lower part of the bearing mounting holes. The rotating bearing is installed in the bearing mounting holes, and the lower end face of the outer ring of the rotating bearing abuts against the stepped ring.

3. The CNC vertical moving positioning device according to claim 2, characterized in that: The rotating bearing is an angular contact ball bearing.

4. The CNC vertical moving positioning device according to claim 3, characterized in that: A fixing cover is provided on the upper part of the bearing mounting hole, and the lower end face of the fixing cover abuts against the upper end face of the outer ring of the rotating bearing.

5. A CNC vertical moving positioning device according to claim 4, characterized in that: The lower part of the lead screw is provided with a step, which abuts against the upper end face of the inner ring of the rotating bearing.

6. A CNC vertical moving positioning device according to claim 5, characterized in that: The step of the lead screw abuts against the upper end face of the inner ring of the rotating bearing via a transition ring.

7. A CNC vertical moving positioning device according to claim 4, characterized in that: An annular buffer pad is fitted onto the lead screw, and the annular buffer pad is located on the upper surface of the fixed cover.

8. A CNC vertical moving positioning device according to claim 1, characterized in that: Both sides of the lower part of the vertical housing are provided with mounting flanges, and the lower part of the mounting flanges is provided with several mounting holes.

9. A CNC vertical moving positioning device according to claim 8, characterized in that: The vertical shell, the load-bearing plate, and the base flange are integrally formed.

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