CN111551364A - Lead screw running-in mechanism and running-in method - Google Patents
Lead screw running-in mechanism and running-in method Download PDFInfo
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- CN111551364A CN111551364A CN202010384339.1A CN202010384339A CN111551364A CN 111551364 A CN111551364 A CN 111551364A CN 202010384339 A CN202010384339 A CN 202010384339A CN 111551364 A CN111551364 A CN 111551364A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Abstract
The invention belongs to the technical field of lead screw running-in, and discloses a lead screw running-in mechanism and a running-in method, wherein the lead screw running-in mechanism comprises a fastener, an inner thread and a lead screw thread; the pressing piece is provided with a central through hole, the lead screw penetrates through the central through hole, and an elastic piece is arranged between the fastening piece and the pressing piece; and the grinding part is in threaded connection with the screw rod and is arranged on one side of the pressing part, which is far away from the fastener, and can rotate relative to the screw rod to move the pressing part towards the direction of loading the elastic part and grind the screw rod. According to the screw rod running-in mechanism, the elastic piece is arranged between the fastening piece and the pressing piece, the running-in piece is used for loading the elastic piece, the elastic loading force of the elastic piece is used for providing a simulated heavy load, the size of the heavy load can be adjusted at will, the screw rod to be run in is not required to be installed on complete actual equipment, the running-in process is time-saving and labor-saving, and the driving mode is simple.
Description
Technical Field
The invention relates to the technical field of lead screw running-in, in particular to a lead screw running-in mechanism and a running-in method.
Background
The screw belongs to an important part in a mechanical structure and can convert the rotary motion of a motor into the linear motion of a workpiece. Most lead screws need to be subjected to running-in treatment when leaving a factory, and the bearing surfaces of the lead screws simulate the actual working conditions to carry out a pressure running-in test.
To some heavy load lead screws, the bearing capacity of a single lead screw is more than 20 tons, the surface grinding work needs very big load to be able to play good grinding effect, and the actual working condition is simulated even, so that the advantage is that the actual working condition simulation is vivid, but the defect is also obvious, namely, the actual equipment of the whole group is required to be tested at every time, the test process is complicated, the actual equipment is required to be used for the test at every time, and the lead screw running-in method is time-consuming and labor-consuming.
Disclosure of Invention
The invention aims to provide a screw running-in mechanism and a running-in method, which aim to solve the problem that the running-in of a heavy-load screw in the prior art is time-consuming and labor-consuming.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lead screw running-in mechanism comprising:
the fastener is provided with internal threads and is in threaded installation with the lead screw;
the pressing piece is provided with a central through hole, and the lead screw penetrates through the central through hole;
the elastic piece is arranged between the fastening piece and the pressing piece;
the grinding part is provided with an internal thread, is in threaded connection with the screw rod and is arranged on one side of the pressing part, which deviates from the fastener, and can rotate relative to the screw rod to move the pressing part towards the direction of loading the elastic part.
Optionally, there are a plurality of the elastic members, and the plurality of the elastic members are uniformly distributed between the fastening member and the pressing member at intervals.
Optionally, the opposite inner sides of the pressing piece and the fastening piece are respectively provided with corresponding elastic piece positioning structures, and the elastic piece positioning structures are configured to limit the elastic pieces.
Optionally, the grinding device further comprises a gasket, wherein the gasket is sleeved on the lead screw and clamped between the pressing piece and the grinding piece.
Optionally, the fastening device further comprises a limiting member, and the limiting member is connected with the fastening member and the pressing member; or the like, or, alternatively,
the limiting part is connected with the fastening part, the pressing part and the grinding part at the same time.
Optionally, the at least two limiting members are uniformly distributed around the screw rod at intervals.
Optionally, the fastener assembly further comprises a driving member connected to the fastener or the engaging member, the driving member configured to drive rotation of the fastener or the engaging member.
A lead screw running-in method adopts the lead screw running-in mechanism, and the specific method is as follows:
firstly, the fastening piece is in threaded connection with the lead screw, the lead screw penetrates through the central through hole in the pressing piece, and the elastic piece is arranged between the fastening piece and the pressing piece;
the grinding element is in threaded connection with the lead screw, and the grinding element is rotated to enable the pressing element to move towards the direction of loading the elastic element until the elastic element reaches a target loading state;
and rotating the grinding piece to walk on the lead screw to grind the lead screw.
Optionally, rotation of the abrading article provides a driving force via a drive member.
Optionally, the driving member drives the rotational run-in of the milling element by driving rotation of the fastener.
The invention has the beneficial effects that:
according to the screw rod running-in mechanism, the elastic piece is arranged between the fastening piece and the pressing piece, the running-in piece provides loading for the elastic piece, the simulated heavy load is provided by the aid of the elastic loading force of the elastic piece, and the size of the heavy load can be adjusted at will. The screw rod running-in mechanism is simple in structure, the running-in of the screw rod is realized through the running-in piece along the running process of the threads on the screw rod without installing the screw rod to be run-in to complete actual equipment, and the screw rod running-in mechanism is convenient to assemble and disassemble, time-saving, labor-saving and easy to drive.
According to the screw rod running-in method, the fastening piece and the running-in piece are respectively in threaded connection and walk with the screw rod, the elastic piece is loaded by utilizing the threaded tightening force, and the magnitude of the loading force or the loading load can be adjusted at will. The grinding-in of the screw rod can be realized only by spirally walking the grinding-in part on the screw rod, the screw rod to be ground is not required to be mounted on complete actual equipment, and the grinding-in device is convenient to assemble and disassemble, time-saving and labor-saving.
Drawings
FIG. 1 is a schematic view of the overall structure of a lead screw running-in mechanism provided by the invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
fig. 3 is an enlarged view of the region B in fig. 2.
In the figure:
1. a lead screw; 2, fastening pieces; 3, a pressing piece; 4, an elastic member;
5. grinding a combined piece; 6, driving piece; a washer; a stop.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The present invention first provides a screw running-in mechanism, as shown in fig. 1-3, the screw running-in mechanism includes: the screw rod comprises a fastening piece 2, a pressing piece 3, an elastic piece 4 and a running-in piece 5, wherein the fastening piece 2 is provided with internal threads and is in threaded mounting with the screw rod 1; the pressing piece 3 is provided with a central through hole, and the lead screw 1 penetrates through the central through hole; the elastic piece 4 is arranged between the fastening piece 2 and the pressing piece 3; the grinding element 5 is provided with an internal thread, is connected with the screw rod 1 in a threaded manner and is arranged on one side of the pressing element 3, which is far away from the fastener 2, and can rotate relative to the screw rod 1 to move the pressing element 3 towards the direction of the loading elastic element 4.
It should be explained that the screw running-in mechanism provided by the invention is a running-in mechanism for heavy-duty screws, which can provide accurate loading force for loading, and because the heavy-duty load is provided by the elastic member 4, it is suggested that a large damping elastic member is selected when in use, the elastic member 4 is arranged between the fastening member 2 and the pressing member 3, the elastic member 4 is loaded by the grinding member 5, the elastic member 4 can be loaded by the screwing force of the screw thread, and the simulated heavy-duty load is provided by the elastic loading force of the elastic member 4, so that the size of the heavy-duty load can be adjusted freely. This lead screw running-in mechanism's simple structure need not install the complete actual equipment with the lead screw 1 of treating the running-in, be threaded connection between fastener 2 and the lead screw 1, running-in 5 and lead screw 1 threaded connection, two threaded connection's middle loading elastic component 4, realize the running-in to lead screw 1 at fastener 2 and running-in 5 along the walking in-process of lead screw 1 upper thread, not only assemble and dismantle the convenience, labour saving and time saving moreover, the drive mode is simple. In other embodiments, the screw running-in mechanism provided by the invention is not limited to one fastener 2 and one running-in element 5, and the aim of adopting a plurality of fasteners 2 and/or running-in elements 5 is to increase the threaded connection section with the screw 1 so as to run in the screw 1 with larger length in a smaller rotation stroke. Of course, it is also possible to lengthen the threaded connection of a single run-in 5 to achieve a run-in of a longer distance within one thread pitch.
Further, in the invention, a plurality of elastic members 4 are arranged, and the plurality of elastic members 4 are uniformly distributed between the fastening member 2 and the pressing member 3 at intervals. It should be noted that, a plurality of elastic members 4 are uniformly distributed and spaced in the circumferential direction of the wire winding rod 1, and do not contact each other, so as to avoid interference, and uniform loading and unloading can be realized, so as to prevent damage to the thread of the wire winding rod 1.
Preferably, opposite inner sides of the pressing piece 3 and the fastening piece 2 are respectively provided with corresponding elastic piece positioning structures, and the elastic piece positioning structures are configured to limit the elastic pieces 4. In different embodiments, the elastic member positioning structures may be provided in the form of cylindrical pins or mounting grooves, and one-to-one elastic member positioning structures are provided according to the number of the elastic members 4 to define the positions of the elastic members 4 and prevent the elastic members from being displaced or contacting the lead screw 1 during running-in. The spring positioning structure is preferably in the form of a mounting groove, which avoids as much as possible the loading of the spring 4 by interfering influences in the form of cylindrical pins during compression of the spring 4. Meanwhile, the groove-shaped elastic piece positioning structure can relatively limit the circumferential relative position between the fastening piece 2 and the pressing piece 3, and relative rotation is avoided in the running-in process.
As shown in fig. 3, the screw running-in mechanism of the present invention further includes a washer 7, wherein the washer 7 is sleeved on the screw 1 and clamped between the pressing member 3 and the running-in member 5. The main function of the gasket 7 is anti-skid, in the running-in process, the fastening piece 2 rotates spirally through the gasket 7 between the running-in piece 5 and the pressing piece 3, the elastic piece 4, the pressing piece 3 and the running-in piece 5 rotate along with the spiral rotation of the screw rod 1, the pressing piece 3 transmits power to the running-in piece 5 through friction force between the pressing piece and the gasket 7, and the reverse is also true. Therefore, the gasket 7 realizes the compression fit between the compression piece 3 and the running-in piece 5, and forms a large friction force, the friction force is larger than the surface friction force generated by running-in, and the surface of the lead screw 1 is generally lubricated by oil, so that the friction force is easy to meet. The central through hole of packing ring 7 is the same with the internal diameter of the central through hole that compresses tightly piece 3, all is greater than lead screw 1's external diameter of screw thread, avoids rubbing between the in-process and lead screw 1 at the break-in, harms the screw thread on the lead screw 1.
Optionally, the screw running-in mechanism of the present invention further includes a limiting member 8, as shown in fig. 1 to 3, the limiting member 8 connects the fastening member 2 and the pressing member 3. In the process that the fastening piece 2 rotates along the screw rod 1 in a spiral mode, the limiting piece 8 is arranged, and relative rotation between the fastening piece 2 and the pressing piece 3 can be prevented. Meanwhile, the limiting part 8 can also provide pretightening force in the installation process so as to conveniently install the elastic part 4 and load the elastic part 4.
The limiting part 8 can also be connected with the fastening part 2, the pressing part 3 and the running-in part 5 at the same time, so that the relative positions of the three parts are unchanged, and the running-in process is guaranteed to be carried out smoothly. Wherein, the locating part 8 can be connected the fastener 2 alone and compress tightly 3 back reconnection and compress tightly piece 3 and the piece 5 that grinds, also can adopt a pin or bolt through connection spacing.
The number of the limiting members 8 is at least two, and when at least two limiting members 8 are adopted, the at least two limiting members 8 are uniformly distributed around the winding screw 1 at intervals and can be alternately arranged with the elastic member 4 at intervals.
Further, the screw running-in mechanism of the present invention further comprises a driving member 6, the driving member 6 is connected to the fastener 2 or the running-in member 5, and the driving member 6 is configured to drive the rotation of the fastener 2 or the running-in member 5. In the example given in fig. 1, the driving members 6 are rod-shaped, at least two rod-shaped driving members 6 are symmetrically disposed on the fastening member 2, and by manually holding the two rod-shaped driving members 6 to drive the fastening member 2 to rotate along the screw rod 1, the threaded movement of the fastening member 2 on the screw rod 1 can be realized, the threaded movement of the grinding member 5 is driven, and the screwing-in of the screw rod 1 is realized, so that the grinding-in of the heavy-load screw rod can be manually realized. In order to further reduce labor cost and strength, the driving piece 6 can also adopt a motor, the output end of the motor is connected with the grinding piece 5, and the grinding piece 5 is driven by the motor to ascend and descend along the thread of the screw rod 1, so that automatic grinding is realized. It should be noted that, since the grinding member 5 is raised and lowered along the screw thread, the cooperation of rotation and displacement is noted during the installation of the motor. When the driver 6 is connected to the fastener 2, the driving is the same.
The invention also provides a lead screw running-in method by applying the lead screw running-in mechanism provided by the invention, which comprises the following specific steps:
firstly, a fastener 2 is in threaded connection with a lead screw 1, the lead screw 1 penetrates through a central through hole in a pressing piece 3, and an elastic piece 4 is arranged between the fastener 2 and the pressing piece 3;
screwing a grinding piece 5 with the screw rod 1 and rotating the grinding piece 5 to enable the pressing piece 3 to move towards the direction of loading the elastic piece 4 until the elastic piece 4 reaches a target loading state;
the rotating grinding assembly 5 runs on the screw rod 1 to grind the screw rod 1.
In the method, in the running-in process, the elastic part 4 is positioned between the fastening part 2 and the pressing part 3 and is in an elastic loading state, loading force is generated between the running-in part 5 and the fastening part 2 to simulate heavy load, and when the running-in part 5 is lifted relative to the screw thread of the screw rod 1, the heavy load running-in of the screw rod 1 is realized. In the embodiment shown in fig. 1, after the elastic member 4 is installed between the fastening member 2 and the pressing member 3, the elastic member 4 is pre-tightened by the cooperation of the bolt and the nut, so that the elastic member 4 is prevented from falling off, and after the grinding member 5 is screwed to the pressing member 3, the limiting member 8 can be retained or removed. At least three elastic parts 4 are arranged between the fastening part 2 and the pressing part 3, the elastic parts 4 and the limiting parts 8 are alternately and uniformly arranged at intervals, the number of the elastic parts 4 is the same as that of the limiting parts 8, and uniform loading and running-in the working process can be guaranteed.
The loading state of elastic component 4 is compressed and loaded through grinding piece 5, and grinding piece 5 threaded connection lead screw 1 is located and is pressed 3 one side, and grinding piece 5 can advance the direction that promotes to press 3 towards the compression of elastic component 4 on lead screw 1 screw. The setting of the running-in part 5 is to provide the spring 4 with a target loading state and to run-in the screw 1. When the elastic element 4 is compressed to generate elastic force, the grinding element 5 is rotated towards the pressing element 3 to push the pressing element 3 to compress the elastic element 4 to generate elastic deformation. Of course, if necessary, the elastic member 4 may also be stretched, at this time, both ends of the elastic member 4 need to be firmly fixed between the fastening member 2 and the pressing member 3, and the nut is disposed inside the fastening member 2 and the pressing member 3 to increase the distance between the fastening member 2 and the pressing member 3, so that the elastic member 4 is elastically stretched and deformed to obtain a heavy load. The present invention is exemplified by the case of compressing the elastic member 4.
The rotation of the engaging member 5 provides a driving force by the driving member 6. The grinding part 5 runs on the thread of the screw rod 1, the driving force for driving the grinding part 5 to rotate is required, and the grinding part can be driven manually or electrically, for example, the grinding part is driven electrically by a motor. The use of the driving member 6 allows the running-in of the running-in element 5 to be driven in rotation with a small force.
The driving piece 6 can drive the grinding piece 5 to carry out forward grinding and reverse grinding on the screw rod 1. According to the requirement, the lead screw 1 can be milled through the forward rotation and the reverse rotation of the milling part 5, and the milling part 5 can be driven to move repeatedly by the driving part 6 until the milling effect of the lead screw 1 is expected.
Alternatively, the driving member 6 may drive the rotation of the fastening member 2 and thus the rotational running-in of the running-in member 5. Since the running-in piece 5 and the fastening piece 2 rotate along the thread of the screw rod 2 in the running-in process, the driving piece 6 is arranged on the running-in piece 5 or the fastening piece 2, and the running-in can be repeatedly rotated.
According to the lead screw running-in method, the heavy load with the randomly adjustable magnitude is provided for the loading force of the elastic part 4, the running-in of the lead screw 1 can be realized only by the spiral walking of the running-in part 5 on the lead screw 1, the lead screw 1 to be run-in is not required to be installed on complete actual equipment, and the lead screw running-in method is convenient to assemble and disassemble, time-saving and labor-saving.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A lead screw running-in mechanism is characterized by comprising:
the fastening piece (2) is provided with internal threads and is in threaded installation with the lead screw (1);
the pressing piece (3) is provided with a central through hole, and the lead screw (1) penetrates through the central through hole;
the elastic piece (4), the said elastic piece (4) locates between said fastener (2) and said compressing component (3);
the grinding part (5), the grinding part (5) has the internal thread, and threaded connection is in lead screw (1) and locate compress tightly one (3) and deviate from one side of fastener (2), can for lead screw (1) rotate with compress tightly one (3) orientation loading the direction removal of elastic component (4) and to lead screw (1) go on the running-in.
2. Lead screw running-in mechanism according to claim 1, characterized in that the elastic member (4) is provided in plurality, and the elastic members (4) are arranged at intervals between the fastening member (2) and the pressing member (3).
3. Lead screw running-in mechanism according to claim 1 or 2, characterized in that the opposite inner sides of the pressing piece (3) and the fastening piece (2) are provided with corresponding elastic piece positioning structures, respectively, which are configured to limit the elastic piece (4).
4. The lead screw running-in mechanism according to claim 1, further comprising a gasket (7), wherein the gasket (7) is sleeved on the lead screw (1) and clamped between the pressing member (3) and the grinding member (5).
5. A screw running-in mechanism according to claim 1, further comprising a stop member (8), the stop member (8) connecting the fastener (2) and the compression member (3); or the like, or, alternatively,
the limiting part (8) is connected with the fastening part (2), the pressing part (3) and the grinding part (5) at the same time.
6. Lead screw running-in mechanism according to claim 5, characterized in that the stop elements (8) are at least two, spaced apart around the lead screw (1).
7. The lead screw running-in mechanism according to claim 1, further comprising a driving member (6), the driving member (6) being connected to the fastener (2) or the running-in member (5), the driving member (6) being configured to drive the rotation of the fastener (2) or the running-in member (5).
8. A lead screw running-in method is characterized in that the lead screw running-in mechanism of any one of claims 1 to 7 is adopted, and the specific method is as follows:
firstly, the fastening piece (2) is in threaded connection with the lead screw (1), the lead screw (1) penetrates through the central through hole in the pressing piece (3), and the elastic piece (4) is arranged between the fastening piece (2) and the pressing piece (3);
screwing the grinding element (5) and the screw rod (1) and rotating the grinding element (5) to enable the pressing element (3) to move towards the direction of loading the elastic element (4) until the elastic element (4) reaches a target loading state;
and rotating the grinding part (5) to walk on the screw rod (1) to grind the screw rod (1).
9. Lead screw running-in method according to claim 8, characterized in that the rotation of the running-in element (5) provides the driving force by means of a driving element (6).
10. Lead screw running-in method according to claim 9, characterized in that the driving member (6) brings about a rotational running-in of the running-in element (5) by driving the rotation of the fastening member (2).
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| CN202010384339.1A CN111551364B (en) | 2020-05-07 | 2020-05-07 | Lead screw running-in mechanism and running-in method |
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| CN202010384339.1A CN111551364B (en) | 2020-05-07 | 2020-05-07 | Lead screw running-in mechanism and running-in method |
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