Lead screw alignment auxiliary tool

Abstract

The utility model discloses a screw rod alignment auxiliary frock, include: positioning part, including: positioning, for abutting at the acute angle arrangement's inclined side of swallow tail guide rail and horizontal bottom surface, connecting piece, perpendicularly positioning part setting, with Positioning part can dismantle connection, first detection table, set up in the one end of connecting piece near screw rod, with first pointer, first pointer abuts at the side position of screw rod, second detection table, movable, arrange above screw rod part, with second pointer, second pointer abuts at the position above screw rod, the screw rod alignment auxiliary frock that the utility model provides, it can greatly reduce the deviation in the alignment of screw rod process, guarantees the alignment effect of screw rod.

Description

Technical Field

[0001] This utility model belongs to the technical field of lead screw alignment equipment, specifically, it relates to an improvement of an auxiliary tooling for lead screw alignment. Background Technology

[0002] As a precision mechanical transmission component, the ball screw plays a crucial role in modern high-precision equipment. Its core function is to accurately convert the rotary motion of a servo motor into the linear motion of a motion platform. This characteristic makes it an ideal transmission choice for the marble motion platform of a high-precision coordinate measuring machine (CMM). In a high-precision CMM, the installation quality of the ball screw directly determines the overall measurement accuracy and long-term stability of the machine.

[0003] The ball screw installed in the coordinate measuring machine must ensure that the axis of the ball screw and the extension direction of the dovetail guide on the coordinate measuring machine are parallel. If the above requirements are not met, the nonlinear error of the transmission system will be significantly increased; secondly, it will accelerate the wear of the balls and the screw, and shorten its service life. Currently, aligning the lead screw axis requires a dial indicator in conjunction with an L-shaped positioning plate. During positioning, the long side of the L-shaped positioning plate is engaged with the top surface of the dovetail guide rail, and its short side is engaged with the edge where the top surface and the side slope of the dovetail guide rail intersect. The dial indicator is fixed on the top surface of the L-shaped positioning plate, and the dial indicator pointer extends from the side of the dovetail guide rail to the lead screw position, resting against the side of the lead screw. Due to the large span of the pointer, a cantilever-like structure is formed. During the measurement process, as the positioning plate moves the dial indicator, the short side is engaged with the edge, which has a large machining error and has not undergone fine machining. When moving along the edge, the roughness of the edge affects the measurement accuracy. Furthermore, because the pointer is suspended, it is extremely prone to shaking during the measurement process, which also affects the measurement accuracy.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] This invention addresses the problem of large errors in the tooling used for aligning the lead screw axis in the prior art. It proposes a tooling for lead screw alignment that can greatly reduce deviations during the lead screw alignment process and ensure the alignment effect of the lead screw.

[0006] To achieve the above-mentioned utility model / design objectives, the present utility model adopts the following technical solution: A lead screw alignment auxiliary fixture includes: Positioning components include: The positioning part is used to abut against the inclined side and horizontal bottom surface of the dovetail guide rail, which are arranged at an acute angle. A connector is positioned perpendicular to the positioning component and is detachably connected to the positioning component. A first test gauge is set at one end of the connector near the lead screw and has a first pointer, which is located against the side of the lead screw. The second test gauge is movable and arranged above the lead screw assembly. It has a second pointer that rests against the upper part of the lead screw.

[0007] In some embodiments of this application, the positioning component includes a positioning body, and two positioning parts are provided, which are respectively connected to the two ends of the positioning body.

[0008] In some embodiments of this application, the positioning part is a circular positioning element, the positioning body is a positioning shaft, and the circular positioning element is connected to both ends of the positioning shaft and integrally formed with the positioning shaft.

[0009] Some embodiments of this application include: A magnetic mounting base, on which the second detection gauge is mounted; A rigid component, movably mounted on the horizontal bottom surface of the dovetail guide rail, is used to attract the magnetic mounting base.

[0010] In some embodiments of this application, an insertion part is provided on the positioning body; One end of the connector is provided with a first connecting part, and the end of the connector with the first connecting part is inserted into the insertion part; The first locking element is screwed and fixed into the first connecting part through the positioning body.

[0011] Some embodiments of this application include: A clamping seat, which is assembled inside the connector, is used to clamp and fix the first detection table; The connector has a hollow cavity inside, and a second connecting part is provided at one end opposite to the first connecting part. The second locking member is screwed onto the second connecting part and partially extends into the hollow cavity, with its end abutting against the side of the clamping seat.

[0012] In some embodiments of this application, multiple connectors are provided, with different lengths, and the first and second connecting portions at both ends have the same structure.

[0013] In some embodiments of this application, the positioning body is provided with a turning clearance portion for turning the first locking member and an insertion clearance portion for inserting the connector.

[0014] In some embodiments of this application, the clamping seat includes: seat body; Two clamping walls are provided, arranged opposite to each other, extending from the base body. There is a gap between the two clamping walls. Each clamping wall has a recessed portion formed from the recessed portion of the clamping wall. The recessed portion between the two clamping walls forms a support channel that matches the shape of the first pointer. Locking assembly for locking and securing the two clamping walls.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are: The lead screw alignment auxiliary tooling in this utility model is equipped with a positioning component. During positioning, the positioning component abuts against the inclined side and horizontal bottom surface of the precision-machined dovetail guide rail. The high precision of the dovetail guide rail surface results in extremely small measurement deviations, thereby ensuring measurement accuracy. Furthermore, the positioning part rests against the inclined side and the horizontal bottom surface arranged at an acute angle. When the tooling moves along the dovetail guide rail, the positioning part is always clamped and positioned by the two surfaces of the dovetail guide rail. This ensures that the positioning part always moves along the extension direction parallel to the guide rail and will not experience any positional deviation, thus ensuring measurement accuracy. Secondly, the first gauge is installed at the end of the connector near the lead screw. This makes the distance between the first pointer of the first gauge and the lead screw very short, shortening the length of the first pointer and avoiding the detection error caused by the first pointer shaking during the movement of the tooling, thus further ensuring the accuracy of the detection.

[0016] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structure of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model. Figure 1 ; Figure 2 This is a three-dimensional structure of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model. Figure 2 ; Figure 3 This is a three-dimensional structure of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model. Figure 3 ; Figure 4This is a front view of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model; Figure 5 This is a top view of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model; Figure 6 for Figure 5 Sectional view along axis AA; Figure 7 This is a schematic diagram of the clamping seat and connecting parts of an embodiment of the lead screw alignment auxiliary tooling proposed in this utility model. Figure 8 This is a schematic diagram of the positioning component and the dovetail guide rail in one embodiment of the lead screw alignment auxiliary tooling proposed in this utility model.

[0019] In the diagram, 100 is the dovetail guide rail; 110 is the inclined side; 120 is the horizontal bottom surface; 200 is the positioning component; 210 is the positioning part; 220 is the positioning body; 221 is the insertion part; 222 is the screwing clearance part; 223 is the insertion clearance part; 300 is the connector; 310 is the first connecting part; 320 is the second connecting part; 400 is the first gauge; 410 is the first pointer; 500 is the second gauge; 510 is the second pointer; 610 is the first locking component; 620 is the second locking component; 700 is the clamping seat; 710 is the seat body; 720 is the clamping wall; 730 is the support channel; 740 is the locking assembly; and 800 is the lead screw. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" 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.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0023] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0024] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In some embodiments of this application, a lead screw alignment auxiliary fixture is proposed, comprising: Positioning component 200, the positioning component 200 includes: The positioning part 210 is used to abut against the inclined side 110 and the horizontal bottom surface 120 of the dovetail guide rail 100, which are arranged at an acute angle. The connector 300 is disposed perpendicular to the positioning component 200, and one end is detachably connected to the positioning component 200; A first test gauge 400 is disposed at one end of the connector 300 near the lead screw 800, and has a first pointer 410, which abuts against the side of the lead screw 800. The second measuring instrument 500 is movable and arranged above the lead screw 800. It has a second pointer 510, which rests against the lead screw 800 at a position above it.

[0026] For the first test table 400, use the first micrometer; for the second test table 500, use the second micrometer.

[0027] The first test table is arranged horizontally at 400, and the second test table is arranged vertically at 500.

[0028] In this embodiment, the lead screw 800 alignment auxiliary fixture is mainly used to adjust the position of the lead screw 800 so that the axis of the lead screw is set parallel to the extension direction of the dovetail guide rail 100.

[0029] In use, the positioning part 210 of the positioning component 200 is placed against the inclined measuring and horizontal bottom surface 120 of the dovetail guide rail 100, which have high machining positioning accuracy. Then, it is moved along the length of the dovetail guide rail 100 from one end of the lead screw 800 to the other. During testing, several side testing points can be selected on the side of the lead screw 800. During testing, the fixture is first moved to the position of the first testing point. At this time, the first testing gauge 400 will display a value. If the lead screw 800 does not deviate, the values ​​of the first testing gauge 400 read at the remaining testing points should be the same. If the lead screw 800 is offset, it may display different values ​​at the second detection point. Adjust the lead screw 800 left and right according to the displayed value, and then continue to move to the third detection point for adjustment. Once the detection and adjustment of all detection points are completed, the lead screw 800 is aligned.

[0030] Since the positioning part 210 always rests against the inclined side 110 and horizontal bottom surface 120 of the dovetail guide rail 100 during the detection process, it can be ensured that the positioning part 200 always moves along the direction of extension of the parallel guide rail during the entire movement of the fixture. The first measuring gauge 400 is mounted on the connecting part 300 of the vertical positioning part 200 and moves with the positioning part 200. If the axis of the lead screw 800 does not deviate in the direction of extension of the parallel guide rail, then the value detected by the first measuring gauge 400 should be the same. When the value of the first measuring gauge 400 is different at different positions of the lead screw 800, it indicates that the lead screw 800 has deviated from left to right.

[0031] When detecting whether the lead screw 800 is offset in the vertical direction, several detection points can be selected at the top surface of the lead screw 800. During the detection, the second detection meter 500 is moved sequentially to the multiple detection point positions, and the value of the second detection meter 500 is read. If there is no offset in the vertical direction, the value at each detection point will be the same. If there is a change in the value at the detection point, the vertical position of the lead screw 800 can be adjusted.

[0032] In this embodiment, the lead screw 800 is aligned with the auxiliary tooling, and the positioning component 200 is provided with a positioning part 210. During positioning, the positioning part 210 abuts against the inclined side 110 and the horizontal bottom surface 120 of the precision-machined dovetail guide rail 100. The high precision of the dovetail guide rail 100 surface results in extremely small measurement deviations, thereby ensuring measurement accuracy. Furthermore, the positioning part 210 abuts against the inclined side surface 110 and the horizontal bottom surface 120 arranged at an acute angle. When the tooling moves along the dovetail guide rail 100, the positioning part 200 is always clamped and positioned by the two surfaces of the dovetail guide rail 100, which can ensure that the positioning part 200 always moves along the extension direction parallel to the guide rail, and will not cause positional deviation, thus ensuring measurement accuracy. Secondly, the first gauge 400 is installed at the end of the connector 300 near the lead screw, which makes the distance between the first pointer 410 of the first gauge 400 and the lead screw 800 very short, shortening the length of the first pointer 410 and avoiding the detection error caused by the shaking of the first pointer 410 during the movement of the tooling, thus further ensuring the accuracy of the detection.

[0033] In some embodiments of this application, the positioning component 200 includes a positioning body 220, and two positioning parts 210 are provided, which are respectively connected to the two ends of the positioning body 220.

[0034] By providing positioning parts 210 at both ends of the positioning body 220, it can be ensured that the positioning component 200 can move smoothly and evenly when moving along the inclined side 110 and horizontal bottom surface 120 of the dovetail guide rail 100, without tilting or shaking during movement, thus ensuring the accuracy of the measurement.

[0035] In some embodiments of this application, the positioning part 210 is a circular positioning element, the positioning body 220 is a positioning shaft, and the circular positioning element is connected to both ends of the positioning shaft and integrally formed with the positioning shaft.

[0036] The circular positioning component can be matched and positioned with the dovetail guide rail 100 by abutting its circular outer surface against the inclined side 110 and the horizontal bottom surface 120 of the dovetail guide rail 100 respectively.

[0037] The circular positioning component can be a circular positioning disc or a circular positioning sleeve.

[0038] By directly molding the positioning shaft and the circular positioning component into one piece, it is convenient for processing and manufacturing.

[0039] By setting the positioning part 210 as a circular positioning element, it can be ensured that it can maintain a complete fit with the inclined side 110 and the horizontal bottom surface 120 of the dovetail guide rail 100 during positioning.

[0040] Furthermore, the small contact area between the circular positioning part and the inclined side 110 and the horizontal bottom surface 120 of the dovetail guide rail 100 can minimize the impact of the machining accuracy of the outer side of the positioning part 210 on the measurement results, thus ensuring the accuracy of the measurement.

[0041] When setting up, the circular positioning component can be made of tungsten carbide, and its surface is ultra-precision ground to ensure positioning accuracy.

[0042] Because the circular positioning component has an arc-shaped side, the arc-shaped side can automatically adapt to different wear conditions of the guide rail when it comes into contact with the dovetail guide rail 100, ensuring a close fit with the guide rail.

[0043] In some embodiments of this application, the lead screw alignment auxiliary tooling includes: A magnetic mounting base on which the second detection gauge 500 is mounted; A rigid component is movably mounted on the horizontal bottom surface 120 of the dovetail guide rail 100 for attracting the magnetic mounting base. The magnetic mounting base can adopt an existing structure, which will not be described in detail here.

[0044] When detecting the height deviation of the lead screw 800, the magnetic mounting base can be attracted to the rigid component placed on the horizontal bottom surface 120 of the dovetail guide rail 100. By moving the rigid component along the horizontal bottom surface 120, several points at different selected positions of the lead screw 800 along the axial direction can be detected.

[0045] Rigid components can be made of rigid plates. Their bottom and top surfaces are precision machined to reduce contact errors with the dovetail guide rail 100 and the magnetic mounting base, ensuring measurement accuracy.

[0046] In some embodiments of this application, an insertion part 221 is provided on the positioning body 220; The connector 300 is provided with a first connecting portion 310 at one end thereof, and the end of the connector 300 with the first connecting portion 310 is inserted into the insertion portion 221. The first locking member 610 passes through the positioning body 220 and is screwed and fixed to the first connecting part 310.

[0047] The insertion part 221 is an insertion hole opened on the positioning body 220.

[0048] The first connecting part 310 is a first threaded hole provided at the end of the connector 300, and the first locking member 610 is a first locking bolt or a first locking screw.

[0049] The first connector 300 includes a connecting body segment and an insert segment connected to the connecting body segment. The outer diameter of the insert segment is smaller than the outer diameter of the connecting body segment, and the inner diameter of the insert hole is adapted to the inner diameter of the insert segment.

[0050] During assembly, the insert section is inserted into the insert hole of the positioning body 220. The first locking member 610 passes vertically through the through hole on the positioning body 220 and is screwed into the first threaded hole to limit the left and right directions of the first connecting member 300, so as to prevent the connecting member 300 from moving left and right during the movement of the tooling, which would cause measurement deviation.

[0051] Some embodiments of this application include: Clamping seat 700, used to clamp and fix the first detection gauge 400, is assembled at the end of the connector 300 near the lead screw 800; The connector 300 has a hollow cavity inside, and a second connector 320 is provided at one end of the connector 300 opposite to the first connector 310.

[0052] The second locking member 620 is screwed onto the second connecting part 320 and partially extends into the connecting member 300, with its end abutting against the side of the clamping seat 700.

[0053] A through hole is provided at one end of the connector 300 near the lead screw 800, running from top to bottom through the hollow cavity, and the clamping seat 700 is vertically inserted into the through hole.

[0054] To prevent the clamping seat 700 from swinging left and right relative to the connecting piece 300, causing the first measuring gauge 400 mounted on it to deviate in the left and right measuring direction, a second locking piece 620 is screwed into the end of the second connecting piece 300. It abuts against one side of the clamping seat 700 to limit its left and right movement and ensure the accuracy of the measurement.

[0055] In some embodiments of this application, the second connecting part 320 is a second threaded hole, and the second locking member 620 is a second locking bolt or a second locking screw, which can be screwed into the second threaded hole and, through continuous screwing, extends into the hollow cavity of the connecting member 300 and moves to a position abutting against one side of the clamping seat 700.

[0056] In some embodiments of this application, multiple connectors 300 are provided, with different lengths, and the first connecting portion 310 and the second connecting portion 320 at both ends have the same structure.

[0057] The connector 300 is a connecting rod made of high-strength alloy steel, and it can be connected to the positioning component 200 through the first connecting parts 310 at both ends.

[0058] Connectors 300 of different lengths are provided, and the first connecting part 310 and the second connecting part 320 of each connector 300 have the same structure, so that they can be used to match the alignment of the lead screw 800 which is located at different distances from the dovetail guide rail 100.

[0059] When the distance between the dovetail guide rail 100 and the lead screw 800 is large, a longer connector 300 can be used to connect with the positioning component 200. When the distance between the dovetail guide rail 100 and the lead screw 800 is small, a shorter connector 300 can be used to connect with the positioning component 200.

[0060] The configuration of multiple connectors 300 improves the versatility of the entire lead screw 800 alignment auxiliary tooling.

[0061] In some embodiments of this application, the positioning body 220 is provided with a turning clearance portion 222 for turning the first locking member 610 and an insertion clearance portion 223 for inserting the connector 300.

[0062] The screwing clearance part 222 is a screwing clearance space, and the insertion clearance part 223 is an insertion clearance space.

[0063] In some embodiments of this application, the clamping seat 700 includes: seat body 710; Two clamping walls 720 are provided and are arranged opposite to each other. They are formed from the base body 710 and have a gap between them. Each clamping wall 720 has a recessed portion formed from the recessed portion of the clamping wall 720. The recessed portion between the two clamping walls 720 forms a support channel 730 that is adapted to the shape of the first pointer 410. The locking assembly 740 locks and secures the two clamping walls 720.

[0064] The locking assembly 740 includes a locking bolt and a locking nut, and has through holes on the two clamping walls 720. When locking, the locking bolt passes through the through holes on the two clamping walls 720, and the locking nut is used to tighten and fix the two clamping walls 720.

[0065] The first pointer 410 on the first test gauge 400 can pass through the support channel 730 and abut against the side of the lead screw 800. The support channel 730 can support and position the first pointer 410. By supporting and positioning the first pointer 410 through the support channel 730, it can be ensured that the first pointer 410 will not shake during the movement detection process and will always remain horizontally abut against the side of the lead screw 800, thus ensuring the accuracy of the detection of the linear offset of the side of the lead screw 800.

[0066] The clamping seat 700 is located at the end of the connector 300 near the lead screw 800, and the support channel 730 is supported at the position of the first pointer 410 near the lead screw 800, which further ensures that the part of the first pointer 410 near the lead screw 800 will not shake, and further ensures the measurement accuracy.

[0067] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A lead screw alignment auxiliary fixture, characterized in that, Including: Positioning components include: The positioning part is used to abut against the inclined side and horizontal bottom surface of the dovetail guide rail, which are arranged at an acute angle. A connector is positioned perpendicular to the positioning component and is detachably connected to the positioning component. A first test gauge is set at one end of the connector near the lead screw and has a first pointer, which is located against the side of the lead screw. The second test gauge is movable and arranged above the lead screw assembly. It has a second pointer that rests against the upper part of the lead screw.

2. The lead screw alignment auxiliary fixture according to claim 1, characterized in that, The positioning component includes a positioning body, and two positioning parts are provided, which are respectively connected to both ends of the positioning body.

3. The lead screw alignment auxiliary tooling according to claim 2, characterized in that, The positioning part is a circular positioning component, and the positioning body is a positioning shaft. The circular positioning component is connected to both ends of the positioning shaft and is integrally formed with the positioning shaft.

4. The lead screw alignment auxiliary fixture according to claim 1, characterized in that, Including: A magnetic mounting base, on which the second detection gauge is mounted; A rigid component, movably mounted on the horizontal bottom surface of the dovetail guide rail, is used to attract the magnetic mounting base.

5. The lead screw alignment auxiliary fixture according to claim 1, characterized in that, An insertion part is provided on the positioning body; One end of the connector is provided with a first connecting part, and the end of the connector with the first connecting part is inserted into the insertion part; The first locking element is screwed and fixed into the first connecting part through the positioning body.

6. The lead screw alignment auxiliary tooling according to claim 1, characterized in that, Including: A clamping seat, which is assembled inside the connector, is used to clamp and fix the first detection table; The connector has a hollow cavity inside, and a second connecting part is provided at one end opposite to the first connecting part. The second locking member is screwed onto the second connecting part and partially extends into the hollow cavity, with its end abutting against the side of the clamping seat.

7. The lead screw alignment auxiliary tooling according to claim 1, characterized in that, Multiple connectors are provided, each with a different length, but the first and second connecting parts at both ends have the same structure.

8. The lead screw alignment auxiliary fixture according to claim 1, characterized in that, The positioning body is provided with a turning clearance part for turning the first locking member and an insertion clearance part for inserting the connector.

9. The lead screw alignment auxiliary tooling according to claim 6, characterized in that, The clamping seat includes: seat body; Two clamping walls are provided, arranged opposite to each other, extending from the base body. There is a gap between the two clamping walls. Each clamping wall has a recessed portion formed from the recessed portion of the clamping wall. The recessed portion between the two clamping walls forms a support channel that matches the shape of the first pointer. Locking assembly for locking and securing the two clamping walls.

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