CN218326058U

CN218326058U - Slide rail nut and lead screw stepping motor comprising same

Info

Publication number: CN218326058U
Application number: CN202222765220.6U
Authority: CN
Inventors: 郭俊; 俞斌
Original assignee: Jiangsu Dingzhi Intelligent Control Technology Co ltd
Current assignee: Jiangsu Dingzhi Intelligent Control Technology Co ltd
Priority date: 2022-10-20
Filing date: 2022-10-20
Publication date: 2023-01-17
Anticipated expiration: 2032-10-20

Abstract

The utility model discloses a slide rail nut and a lead screw stepping motor comprising the same, which comprises a metal insert and a nut body which is integrally injection-molded with the metal insert; the center of the metal insert and the nut body is provided with a shaft hole for a screw rod of the screw rod stepping motor to penetrate through, an external thread is arranged at one axial end of the metal insert, a connecting hole is formed in the periphery of the other axial end of the metal insert, the shaft hole of the nut body is provided with an internal thread matched with the screw rod, an annular mounting groove for inserting the end portion of the metal insert is formed in one end of the nut body, a connecting block matched with the connecting hole is formed in the annular mounting groove, and the peripheral face of the nut body is provided with a sliding contact face matched with a sliding rail of the screw rod stepping motor in a sliding mode. The utility model discloses a slide rail nut and connecting axle threaded connection, convenient to detach to the nut body that multiple helical pitch can be made according to output speed requirement cooperation system is inserted to same kind of metal, when making in batches to different model motor accessories, can improve whole machining efficiency greatly.

Description

Slide rail nut and lead screw stepping motor comprising same

Technical Field

The utility model relates to the technical field of electric machine, especially, relate to a slide rail nut and contain its lead screw step motor.

Background

Lead screw step motor's theory of operation is that step motor drives the screw rod rotatory, screw rod and nut screw-thread fit, the nut with slide rail sliding fit and drive the connecting axle motion, realize linear motion, among the current lead screw step motor, be single metal material or plastics material with slide rail complex nut, be according to given process direct forming, every nut corresponds a screw rod model, the nut is also simple welded fastening with the connecting axle, can't dismantle, the application scope that leads to the nut is lower, the motor accessory cost of manufacture of every model increases, in addition, the nut is the axial total length of nut with the contact length of slide rail, the contact surface is great, wearing and tearing are also great, the noise is great when leading to the motor switching-over.

SUMMERY OF THE UTILITY MODEL

For solving among the lead screw step motor of prior art nut and connecting axle for non-detachable welded fastening, and every nut corresponds a screw rod model, and the application scope that leads to the nut is lower, the technical problem of the motor accessories cost of manufacture increase of every model, the utility model provides a slide rail nut and contain its lead screw step motor and solve above-mentioned problem.

The utility model provides a slide rail nut, which comprises a metal insert and a nut body which is integrally injection-molded with the metal insert; the screw rod of confession lead screw step motor has the shaft hole that supplies the screw rod of lead screw step motor to pass in the center of metal mold insert and nut body, and the axial one end of metal mold insert is equipped with the external screw thread, and the axial other end periphery of metal mold insert is equipped with the connecting hole, the shaft hole of nut body have with screw rod complex internal thread, and the one end of nut body has the connecting hole place tip male annular mounting groove that supplies the metal mold insert, form in the annular mounting groove with connecting hole complex connecting block, the outer peripheral face of nut body has lead screw step motor's slide rail sliding fit's sliding contact face.

Furthermore, the shaft hole of the metal insert is larger than the shaft hole of the nut body.

Further, the inner circumferential surface of the connecting hole is a waist-round surface.

Furthermore, the outer peripheral face of nut body has three or more than three lateral surfaces parallel with the slide rail, and sliding contact face is located the lateral surface, and every lateral surface has the groove of dodging to nut body center sunken.

Furthermore, two sides of each avoidance groove are respectively provided with a sliding contact surface.

Furthermore, an inclined plane which is not in contact with the sliding rail is arranged between the adjacent outer side faces.

Further, the width of the avoiding groove is larger than that of the sliding contact surface.

Furthermore, the nut body is made of PBT materials.

The utility model also provides a lead screw step motor, including motor body, screw rod, slide rail, connecting axle and above the slide rail nut, the one end of screw rod is connected with motor body's output, the other end and the nut body threaded connection of screw rod, connecting axle and metal mold insert threaded connection, slide rail nut is located the slide rail.

Furthermore, the inner surface of the slide rail is square.

Furthermore, the connecting shaft and the metal insert are both made of the same metal material.

The utility model has the advantages that:

(1) Slide rail nut and contain its lead screw step motor, slide rail nut comprises metal insert and nut body, metal insert and connecting axle threaded connection, convenient to detach, the preferential preparation of metal insert, the nut body is through with metal insert injection moulding, connect the position at both and adopt connecting hole and connecting block lock joint, can avoid both to drop to the same kind of metal is inserted and can be made the nut body of multiple helical pitch according to output speed requirement cooperation system, when making in batches to different model motor accessories, can improve whole machining efficiency greatly.

(2) Slide rail nut and contain its lead screw step motor, in the axial, metal mold insert and slide rail contactless, only nut body and slide rail contact, axial contact length reduces, the lateral surface of the contact of nut body and slide rail is equipped with and dodges the groove, the ascending contact length of width side also reduces to reduce the friction, reduced the noise.

(3) Slide rail nut and contain its lead screw step motor, the internal surface of slide rail is square, slide rail nut receives the effort of four directions when the switching-over, the atress is balanced, can not produce the skew of slide rail nut because of the switching-over, lead to producing the clearance between slide rail nut and the slide rail, and then arouse the switching-over noise.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is a perspective view of a slide nut according to an embodiment of the present invention;

fig. 2 is an exploded view of an embodiment of the slide nut of the present invention;

FIG. 3 is an axial cross-sectional view of the slide nut of FIG. 2;

FIG. 4 is a side view of FIG. 1;

fig. 5 is a schematic view of the slide rail nut of the present invention cooperating with the connecting shaft and the slide rail;

FIG. 6 isbase:Sub>A sectional view taken along line A-A of FIG. 5;

fig. 7 is a perspective view of an embodiment of the lead screw stepping motor according to the present invention;

fig. 8 is an exploded view of a screw stepping motor according to an embodiment of the present invention.

In the figure, 1, slide rail nut, 101, metal insert, 1011, external screw thread, 1012, connecting hole, 102, nut body, 1021, internal screw thread, 1022, annular mounting groove, 1023, connecting block, 1024, sliding contact surface, 1025, dodge the groove, 1026, inclined plane, 2, shaft hole, 3, slide rail, 4, screw rod, 5, connecting axle, 6, motor body, 7, mounting panel.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Example one

As shown in fig. 1 to 4, a slide nut includes a metal insert 101 and a nut body 102 integrally injection-molded with the metal insert 101; the metal insert 101 is made of metal, preferably stainless steel with good rigidity, and the nut body 102 is preferably made of PBT. The metal insert 101 is preferably processed, the processed metal insert 101 is placed in an injection molding tool for injection molding and forms an injection molding part, namely, the nut body 102, the centers of the metal insert 101 and the nut body 102 are provided with a shaft hole 2 for a screw rod 4 of a screw rod stepping motor to pass through, one axial end of the metal insert 101 is provided with an external thread 1011 for being in threaded connection with the connecting shaft 5, the periphery of the other axial end of the metal insert 101 is provided with a connecting hole 1012, the shaft hole 2 of the nut body 102 is provided with an internal thread 1021 matched with the screw rod 4, one end of the nut body 102 is provided with an annular mounting groove 1022 for inserting the end part of the connecting hole 1012 of the metal insert 101, a connecting block 1023 matched with the connecting hole 1012 is formed in the annular mounting groove 1022, and the peripheral surface of the nut body 102 is provided with a sliding contact surface 1024 in sliding fit with a sliding rail 3 of the screw rod stepping motor.

Metal insert 101 is connected with connecting axle 5, is located nut body 102 with screw rod 4 complex position, adds man-hour in batches, processes metal insert 101 earlier, and metal insert 101 moulds plastics with the nut body 102 of different internal thread 1021 helical pitches and can cooperate the screw rod 4 of different models to be used for the motor of multiple different models, carry out whole nut preparation alone with every model motor of tradition and compare, the utility model discloses whole process time can be shortened greatly. And metal insert 101 and connecting axle 5 threaded connection, the reuse of convenient to detach, nut body 102 and metal insert 101 adopt connecting

hole

1012 and 1023 lock joint of connecting block, and difficult separation is thrown off, improves accessory life, reduces complete machine use cost.

Preferably, the axial hole 2 of the metal insert 101 is larger than the axial hole 2 of the nut body 102. The friction between the inner wall of the metal insert 101 and the screw rod 4 is avoided.

The connecting holes 1012 are arranged in an array along the periphery of the metal insert 101, so that the stress can be guaranteed to be uniform, the inner circumferential surface of the connecting hole 1012 is preferably a waist-shaped circular surface, the waist-shaped circular surface consists of two parallel planes and a circular arc surface connecting the two planes, compared with a common circular hole, the surface area of the waist-shaped circular surface is larger, the contact surface between the connecting hole 1012 and the connecting block 1023 is larger, and the connecting strength can be guaranteed better.

Example two

The slide rail nut 1 needs to drive the connecting shaft 5 to move forwards or backwards, so the slide rail nut 1 needs to be reversed, when the screw rod 4 is reversed instantly, the stress of the slide rail nut 1 changes suddenly, if the slide rail nut 1 and the slide rail 3 are not uniformly stressed, the slide rail nut 1 can shift axially when the slide rail nut 1 is reversed, so that the slide rail nut 1 and the slide rail 3 generate a gap, and therefore, reversing noise is generated, on the basis of the embodiment, the outer peripheral surface of the nut body 102 is provided with three or more outer side surfaces parallel to the slide rail 3, the sliding contact surface 1024 is positioned on the outer side surface, and each outer side surface is provided with an avoiding groove 1025 recessed towards the center of the nut body 102. Every the lateral surface is towards equidirectional not, and the quantity of lateral surface is more, and slide rail nut 1 is more even in equidirectional atress, can avoid slide rail nut 1 switching-over skew more. The arrangement of the avoiding groove 1025 can reduce friction while ensuring stress.

Preferably, each of the escape grooves 1025 is provided with a sliding contact surface 1024 on both sides thereof. The width of the escape groove 1025, which is a dimension perpendicular to the axial direction, is preferably larger than the width of the sliding contact surface 1024.

As shown in fig. 4-6, the nut body 102 of the present embodiment is provided with eight sliding contact surfaces 1024 on the periphery, which are respectively arranged toward four directions, the sliding contact surfaces 1024 in two adjacent directions are perpendicular to each other for matching with the sliding rail 3 with a square inner surface, when the connecting shaft 5 reciprocates, the sliding rail nut 1 inside will have a rotation reversing action, and the eight sliding contact surfaces 1024 are designed to enable the sliding rail nut 1 to have four-direction stresses when advancing and four-direction stresses when retreating, so that the stresses are relatively balanced, and no gap is formed during reversing, thereby enabling the sliding rail nut to run more smoothly.

In order to further reduce the friction force between the slide rail nut 1 and the slide rail 3, an inclined surface 1026 which is not in contact with the slide rail 3 is further arranged between the adjacent outer side surfaces.

EXAMPLE III

A lead screw stepping motor is shown in figures 5-8 and comprises a motor body 6, a screw rod 4, a slide rail 3, a connecting shaft 5 and a slide rail nut 1, wherein one end of the screw rod 4 is connected with the output end of the motor body 6, the other end of the screw rod 4 is in threaded connection with a nut body 102, the connecting shaft 5 is in threaded connection with a metal insert 101, and the slide rail nut 1 is located in the slide rail 3. During installation, the screw rod 4 and the motor body 6 are installed, the sliding rail nut 1 and the connecting shaft 5 are installed, the sliding rail nut 1 is screwed into the screw rod 4, the sliding rail 3 is sleeved on the sliding rail nut, and finally the mounting plate 7 is locked at the front end of the sliding rail 3, so that the sliding rail nut 1 moves inside the sliding rail 3.

The inner surface of the slide rail 3 of the present embodiment is square.

The connecting shaft 5 and the metal insert 101 are preferably made of the same metal material, for example, stainless steel, and two parts made of the same material are screwed more firmly.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "inner", "outer", "axial", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In this specification, the schematic representations of the terms are not necessarily referring to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a slide rail nut which characterized in that: comprises a metal insert (101) and a nut body (102) which is integrally injected with the metal insert (101);

the center of metal insert (101) and nut body (102) has shaft hole (2) that screw rod (4) that supply lead screw rod step motor passed, and the axial one end of metal insert (101) is equipped with external screw thread (1011), and the axial other end periphery of metal insert (101) is equipped with connecting hole (1012), shaft hole (2) of nut body (102) have with screw rod (4) complex internal thread (1021), and the one end of nut body (102) has connecting hole (1012) place tip male annular mounting groove (1022) that supplies metal insert (101), form in annular mounting groove (1022) with connecting hole (1012) complex connecting block (1023), the outer peripheral face of nut body (102) have with slide rail (3) sliding fit's sliding contact face (1024) of lead screw step motor.

2. The slide rail nut of claim 1, wherein: the shaft hole (2) of the metal insert (101) is larger than the shaft hole (2) of the nut body (102).

3. The slide rail nut of claim 1, wherein: the inner circumferential surface of the connecting hole (1012) is a waist-round surface.

4. The slide rail nut of claim 1, wherein: the outer peripheral surface of the nut body (102) is provided with three or more than three outer side surfaces parallel to the sliding rails (3), the sliding contact surface (1024) is positioned on the outer side surfaces, and each outer side surface is provided with an avoiding groove (1025) which is sunken towards the center of the nut body (102).

5. The slide rail nut of claim 4, wherein: two sides of each avoidance groove (1025) are respectively provided with a sliding contact surface (1024).

6. The slide rail nut of claim 4, wherein: an inclined plane (1026) which is not in contact with the sliding rail (3) is arranged between the adjacent outer side surfaces.

7. The slide rail nut of claim 4, wherein: the width of the avoiding groove (1025) is larger than that of the sliding contact surface (1024).

8. The slide rail nut of claim 4, wherein: the nut body (102) is made of PBT materials.

9. The utility model provides a lead screw step motor which characterized in that: the sliding rail nut (1) comprises a motor body (6), a screw rod (4), a sliding rail (3), a connecting shaft (5) and the sliding rail nut (1) as claimed in any one of claims 1 to 8, wherein one end of the screw rod (4) is connected with the output end of the motor body (6), the other end of the screw rod (4) is in threaded connection with a nut body (102), the connecting shaft (5) is in threaded connection with a metal insert (101), and the sliding rail nut (1) is located in the sliding rail (3).

10. The lead screw stepper motor of claim 9, wherein: the inner surface of the sliding rail (3) is square.

11. The lead screw stepper motor of claim 10, wherein: the connecting shaft (5) and the metal insert (101) are both made of the same metal material.