CN210153172U

CN210153172U - End plug type ball reflux device

Info

Publication number: CN210153172U
Application number: CN201920659333.3U
Authority: CN
Inventors: 纪颖旻
Original assignee: PMI GROUP
Current assignee: PMI GROUP; Precision Motion Industries Inc
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-03-17
Anticipated expiration: 2029-05-09

Abstract

The utility model discloses an end stopper formula ball backward flow ware, its key feature includes: the first and second combined parts are in a three-dimensional block shape, the first and second ends of the two parts are connected in a face-to-face way, the first and second combined faces of the two parts are combined in a face-to-face way to form a first and second ball guide grooves which are combined to form a ball channel, the ball channel is provided with an axial port and a radial port, and the first and second parts are in a radial up-and-down configuration relation; the double-dovetail type embedding and clamping component is arranged at the corresponding matching position of the first and second combination surfaces, the two dovetail type male and female fasteners of the double-dovetail type embedding and clamping component are arranged at two different sides of the ball channel, and the disassembling and assembling direction corresponds to the axial line; an extended upper cover portion is disposed at one end of the first member corresponding to the radial port and is in an extended shape with an equal width.

Description

End plug type ball reflux device

Technical Field

The utility model relates to a ball backward flow ware especially indicates an innovative structure of end plug formula ball backward flow ware.

Background

The ball backflow mode of the existing ball screw is mainly divided into an external circulation backflow mode and an end backflow mode; the end-part backflow type design is that the circulation path at the front end and the back end is matched with the through hole in the nut to be used as a steel ball backflow path, so that all the ball grooves on the nut are fully filled with effective steel balls, and therefore, under the condition of the same nut length, the end-part backflow type form generally has higher dynamic load than the external circulation backflow type form.

However, despite the current end-reflux type structure, there still exist some problems and disadvantages in practical applications, which are even more problematic for users, such as: the local side of the ball reflux device is used as a part of supporting interface of the steel ball through a nut structure, the structure shape can cause the over-large friction force of the steel ball to accelerate abrasion and improve actuating noise, and the nut is required to be processed with high precision to form a complete ball reflux channel together with the reflux device, so that the defect of relatively improving working hours and cost is overcome, and the assembly difficulty is relatively improved; in addition, the problem of poor stability of the combined state of the components is caused by the lack of a proper embedding and clamping positioning mechanism among the combined components of some ball reflux devices; in addition, the ball reflux device has the problems and disadvantages of unsatisfactory structural strength, poor steel ball guiding stability and the like because of excessively weak local structure; the disadvantage of these ball reflux devices is an important technical issue to be paid more attention and improved in the related industries.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an end plug type ball reflux unit.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an end plug ball return, comprising: the first component and the second component are combined in a three-dimensional block shape, the first component comprises a first end face, a first combination face and a first ball guide groove in an arc-bent shape, the second component comprises a second end face, a second combination face and a second ball guide groove in an arc-bent shape, the first end face and the second end face are mutually connected in a side-by-side mode, the first combination face and the second combination face are oppositely closed, the first ball guide groove and the second ball guide groove are oppositely combined to form a ball channel with a circular section, the ball channel comprises an axial port and a radial port, the direction of the axial port is the same as that of an axial line, and the direction of the radial port is the same as that of a radial line; the first component and the second component are combined and arranged along the radial direction of the ball screw in an up-and-down arrangement relationship; the double-dovetail type clamping component is arranged at the corresponding matching position of the first combination surface and the second combination surface, the double-dovetail type clamping component comprises two dovetail type male and female fasteners, the two dovetail type male and female fasteners are arranged at two different sides of the ball channel at intervals, and the disassembling direction of each dovetail type male and female fastener corresponds to the axial line; the extending upper cover part is arranged at one end of the radial port of the first component, extends for a set length in an equal width mode, is provided with an extending guide groove which is connected and communicated with the first ball guide groove, and is oppositely defined at two sides of the extending guide groove to form two protective edges; and the extending upper cover part is in a radial protruding shape relative to one end of the second ball guide groove arranged on the second component.

Borrow this innovation unique structure form and technical characteristic, make the utility model discloses contrast prior art, reach following advantage and practical progressive nature:

firstly, the first ball guide groove and the second ball guide groove are combined to form a full-angle ball backflow channel framework with a circular cross section by the structural configuration characteristics that the first component and the second component are combined and configured up and down along the radial direction of the ball screw, and the ball is completely coated by the ball backflow device structure in the backflow process by the configuration, so that the ball backflow device has the advantages of greatly reducing the friction coefficient and the rolling noise, prolonging the service life of the component and the like; in addition, the condition of over-processing of the nut of the ball screw can be avoided, so that the advantages of greatly reducing working hours, cost, assembly difficulty and the like and practical and economic benefits are achieved;

secondly, through the morphological characteristics of the double-dovetail type embedding and clamping component, the combined state of the first part and the second part can achieve an extremely stable positioning state in terms of the radial direction of the corresponding ball screw, and the first part and the second part have the advantage of more convenient disassembly and assembly operation in terms of the axial direction of the corresponding ball screw;

and thirdly, the upper cover part is added through the shape of the upper cover part, and the upper cover part is provided with the extending guide groove and two protective edges, so that the overall structural strength of the end plug type ball reflux device can be improved, the stability of ball guiding is further improved, and the ball reflux device has practical and progressive benefits.

Drawings

Fig. 1 is an exploded perspective view of a preferred embodiment of an end plug type ball reflux unit according to the present invention.

Fig. 2 is an assembled perspective view of the preferred embodiment of the end plug type ball reflux unit of the present invention.

Fig. 3 is an exploded perspective view of the preferred embodiment of the end plug type ball reflux unit of the present invention assembled on a ball screw.

Fig. 4 is an assembled perspective view of the end plug type ball reflux unit of the present invention assembled to a preferred embodiment of a ball screw.

Fig. 5 is a combined axial cross-sectional view of the end plug ball return of the present invention assembled to a preferred embodiment of a ball screw.

Fig. 6 is a combined radial cross-sectional view of the end plug ball return of the present invention assembled to a preferred embodiment of a ball screw.

Fig. 7 is a schematic diagram of the end plug type ball return channel of the present invention in a state of supplying and guiding balls.

Detailed Description

Referring to fig. 1 to 7, the preferred embodiment of the end-stop ball reflux unit of the present invention is only for illustrative purposes and is not limited to the structure of the end-stop ball reflux unit.

As shown in fig. 3 to 7, the end plug type ball return device a is configured to be assembled to an axial end surface 63 of a threaded hole 62 formed in a nut 61 of a ball screw 60, the axial end surface 63 is concavely provided with an accommodating portion 64 for assembling and positioning the end plug type ball return device a, and an axial line L1 and a radial line L2 (as shown in fig. 3) are fictionally formed according to the arrangement direction of the ball screw 60.

The end plug type ball return device a includes the following configuration: a first part 10 and a second part 20 which are combined with each other in a three-dimensional block shape, wherein the first part 10 comprises a first end surface 11, a first combination surface 12 and a first ball guide groove 13 in an arc bending shape; the second member 20 includes a second facing surface 21, a second combining surface 22 and a second ball guiding groove 23 in an arc-curved shape, wherein the first facing surface 11 and the second facing surface 21 are abutted against each other, the first combining surface 12 and the second combining surface 22 are abutted against each other, and the first ball guiding groove 13 and the second ball guiding groove 23 are combined into a ball passage 30 with a circular cross section, and the ball passage 30 includes an axial port 31 and a radial port 32, and the axial port 31 is oriented in the same direction as the axial line L1, and the radial port 32 is oriented in the same direction as the radial line L2; the first member 10 and the second member 20 are arranged in a combined manner in a vertical arrangement along the radial direction of the ball screw 60 (as shown in fig. 6); a pair of dovetail snap members 40 disposed at the corresponding mating position of the first mating surface 12 of the first part 10 and the second mating surface 22 of the second part 20, wherein the pair of dovetail snap members 40 includes two dovetail male and female fasteners 41, the two dovetail male and female fasteners 41 are disposed at two different sides of the ball channel 30 at intervals, and the assembling direction of each dovetail male and female fastener 41 corresponds to the axial line L1; an extended upper cover 50 disposed at one end of the first component 10 corresponding to the radial port 32, the extended upper cover 50 extending in a constant width shape for a predetermined length, the extended upper cover 50 having an extended guide channel 51 communicating with the first ball guide channel 13, and two opposite sides of the extended guide channel 51 defining two guard edges 52; and wherein the extended upper cover portion 50 is protruded in a radial direction with respect to one end of the second ball guide groove 23 provided in the second member 20.

As shown in fig. 1, in this embodiment, a hook-shaped protrusion 70 is further protruded from a side of the first end facing surface 11 of the first component 10 away from the extended upper cover 50, and the hook-shaped protrusion 70 is in a shape of a protruding hook and is defined with an inner groove 71; the arrangement of the hook-shaped protrusion 70 and the inner groove 71 in this embodiment is intended to be as shown in fig. 5, when the end plug type ball reflux apparatus a is installed in the accommodating portion 64 provided on the axial end surface 63 of the nut 61, a retaining ring 90 is further used as its positioning member, and a part of the retaining ring 90 is embedded in the inner groove 71 of the hook-shaped protrusion 70 to generate a positioning effect on the end plug type ball reflux apparatus a.

As shown in fig. 1 and 2, in this embodiment, the first facing surface 11 of the first component 10 and the second facing surface 21 of the second component 20 are further provided with an

auxiliary positioning lug

81, 82, each of the

auxiliary positioning lugs

81, 82 is in a form of protruding toward the radial direction of the ball screw 60, and the auxiliary positioning lug 81 provided on the first facing surface 11 and the auxiliary positioning lug 82 provided on the second facing surface 21 are in a protruding configuration relationship in opposite directions; the

auxiliary positioning lugs

81 and 82 shown in this example are mainly effective in increasing the area of engagement for the mounting state of the end ball return apparatus a and are more stable.

With the above structure, the installation state of the end plug type ball reflux device a of the present invention is shown in fig. 5 to 7, and is assembled in the accommodating portion 64 provided on the axial end surface 63 of the threaded hole 62 provided on the nut 61, and the end plug type ball reflux device a can be two sets of implementation forms disposed at the two axial ends of the nut 61 in pairs as shown in fig. 7, and a connecting channel 65 is provided in the upper side wall of the nut 61 shown in the figure for connecting the axial ports 31 provided on the ball channel 30 of the two end plug type ball reflux devices a, thereby forming a ball circulation guiding path.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An end plug type ball reflux device is used for being assembled on an axial end face of a threaded hole arranged on a nut of a ball screw, a containing part is concavely arranged on the axial end face for assembling and positioning the end plug type ball reflux device, and an axial line and a radial line are virtually generated according to the arrangement direction of the ball screw; the end plug type ball reflux device is characterized by comprising:

the first part and the second part are combined mutually in a three-dimensional block shape, and the first part comprises a first end surface, a first combination surface and a first ball guide groove in an arc-bent shape; the second component comprises a second end face, a second combination face and a second ball guide groove in an arc-bent shape, the first end face and the second end face are mutually connected in a side-by-side mode, the first combination face and the second combination face are relatively closed, the first ball guide groove and the second ball guide groove are relatively combined to form a ball channel with a circular cross section, the ball channel comprises an axial port and a radial port, the direction of the axial port is the same as the direction of an axial line, and the direction of the radial port is the same as the direction of a radial line; the first component and the second component are combined and arranged in a vertical arrangement along the radial direction of the ball screw;

the double-dovetail type clamping component is arranged at the corresponding matching position of the first combination surface of the first part and the second combination surface of the second part and comprises two dovetail type male and female fasteners, the two dovetail type male and female fasteners are arranged at two different sides of the ball channel at intervals, and the disassembling and assembling direction of each dovetail type male and female fastener corresponds to the axial line; and

the extending upper cover part is arranged at one end of the first component corresponding to the radial port, extends for a set length in an equal-width mode, is provided with an extending guide groove which is connected and communicated with the first ball guide groove, and is oppositely defined at two sides to form two protective edges;

and wherein, the extending upper cover part is in a radial protruding shape relative to one end of the second ball guide groove arranged on the second component.

2. An end plug ball return as in claim 1 wherein the first end of the first member is further provided with a hook projection projecting from a side facing away from the extended upper cover portion, the hook projection being in the form of a projecting hook defining an internal recess.

3. An end plug type ball reflux apparatus as claimed in claim 1 or 2, wherein the first end facing surface of the first member and the second end facing surface of the second member are further provided with an auxiliary positioning lug, each of the auxiliary positioning lugs is in a form of projecting in a radial direction of the ball screw, and the auxiliary positioning lug provided on the first end facing surface is in a configuration relationship of projecting in an opposite direction to the auxiliary positioning lug provided on the second end facing surface.