WO2019010899A1

WO2019010899A1 - Linear module

Info

Publication number: WO2019010899A1
Application number: PCT/CN2017/113220
Authority: WO
Inventors: 蒋国雄
Original assignee: 蒋国雄
Priority date: 2017-07-12
Filing date: 2017-11-28
Publication date: 2019-01-17
Also published as: CN107191480A

Abstract

The invention discloses a linear module comprising a base (1) and a movable seat (2) slidably arranged on the base (1). The base (1) is provided with a guide rail groove (3). A sliding block (4) is arranged at the lower end of the movable seat (2) and provided with a sliding chute groove (5) matched with the guide rail groove (3). Rolling balls (6) are arranged between the guide rail groove (3) and the sliding chute groove (5). The guide rail groove (3) and the rolling balls are in two-point contact, and the sliding chute groove (5) and the rolling balls (6) are in two-point contact. As for the linear module, due to the fact that the sliding chute grooves (3) and the rolling balls (6) are in two-point contact and the guide rail grooves (5) and the rolling balls (6) are in two-point contact, compared with semicircular structured modules in the prior art, the linear module has the advantages that the overall rigidity is improved, meanwhile, the pretightening force is improved by increasing the diameters of the rolling balls so that the backlash of the module can be reduced, and the operation comprehensive precision of the module is improved.

Description

Linear module

Technical field

The invention relates to a linear module, belonging to the technical field of linear positioning components.

Background technique

Linear modules are usually called several types, such as linear modules, Cartesian robots, linear slides, and so on. The linear module is an automatic upgrade unit of the linear guide and the linear drive mechanism of the ball screw. The linear module can realize the straight line and curve movement of the load through the combination of various units, which makes the automation of the light load more flexible and the positioning more precise.

In the prior art, the linear module of the semi-arc structure comprises a base and a moving seat slidingly disposed on the base. As shown in FIG. 1 , the base is provided with a first recess 1 ′, and the lower end of the movable seat is provided with a sliding a block, the slider is provided with a second groove 2' cooperating with the first groove 1', and a steel ball 3' is disposed between the first groove 1' and the second groove 2', and the steel ball 3' is respectively A single point contact is formed between the first groove 1' and the second groove 2', thereby forming two contact points, an upper contact point A and a lower contact point B, and the linear module thus structured is not rigid overall. Operational accuracy is not guaranteed.

Summary of the invention

In view of the deficiencies of the prior art, the object of the present invention is to provide a linear module to improve the overall rigidity of the module and the overall operational precision.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A linear module includes a base and a movable seat slidably disposed on the base, wherein the base is provided with a rail groove, a lower end of the movable seat is provided with a slider, and the slider is provided with the guide rail a groove matching groove, a ball is disposed between the rail groove and the slide groove, and the guide groove is in contact with the ball, and the slide is concave There is a two-point contact between the groove and the ball.

As a modification of the above aspect, the guide rail groove includes a first circular arc segment and a second circular arc segment connected to the first circular arc segment, the slideway groove including the third circular arc segment and the third circular arc a fourth arc segment connected to the segment, wherein the ball and the first arc segment and the second arc segment respectively form a first contact point and a second contact point, wherein the ball is respectively associated with the first A third contact point and a fourth contact point are formed between the three arc segments and the fourth arc segment.

As a modification of the above aspect, the line between the first contact point and the fourth contact point is perpendicular to the line between the second contact point and the third contact point.

As a modification of the above solution, two parallel linear guide rails are protruded from the base, and the guide rail recesses are respectively disposed on inner sides of the two linear guide rails, and the slide rails are respectively disposed on two sides of the slider Groove.

As a modification of the above solution, the front end and the rear end of the base are respectively provided with a front end cover and a fixing base, a rear side of the fixing base is provided with a motor mounting seat, and a rear side of the motor mounting seat is provided with a driving motor. The motor mount is provided with a flexible coupling, and the slider is provided with a lead screw that can drive the movable seat to walk straight, and one end of the lead screw is disposed on the front end cover through a bearing, and the other end of the lead screw The fixing seat is bored through a bearing, and the two ends of the elastic coupling are respectively connected to the lead screw and the driving motor.

As a modification of the above solution, the moving seat is provided with a nut for arranging the lead screw, and the lead screw is screwed with the nut.

As an improvement of the above scheme, the moving seat, the slider, and the lead screw and the wire nut are integrally formed.

As an improvement of the above solution, the upper cover and the side baffle are further included, the upper part of the movable seat is provided with a cover passage, the upper cover passes through the cover passage, and the front and rear ends of the upper cover The front end cover and the fixing base are respectively connected, and the lower end of the side baffle abuts the base, and the front and rear ends of the side baffle are respectively connected to the front end cover and the fixing base.

As a modification of the above aspect, the motor mount includes a case body and a coupling cover that mates with the case body.

The present invention has the following beneficial effects: the linear module of the present invention has two points of contact between the guide groove and the ball, and two points of contact between the slide groove and the ball, The semi-arc structure module in the prior art improves the overall rigidity, and can increase the pre-tightening force by increasing the diameter of the ball to reduce the backlash of the module and improve the operation integration of the module. Precision.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

1 is a schematic structural view of a semi-circular linear module in the prior art;

2 is a schematic structural view of a first embodiment of a linear module of the present invention;

3 is a schematic structural view of a second embodiment of the linear module of the present invention;

4 is a schematic structural view of a moving seat with a lead screw according to an embodiment of the present invention;

Figure 5 is a schematic structural view of a movable seat without a lead screw in a specific embodiment of the present invention;

Figure 6 is a schematic view showing the structure of a Gothic structure in a specific embodiment of the present invention.

In the figure:

1-base 2-moving seat 3-rail groove

4-slider 5-slide groove 6-ball

7-first arc segment 8-second arc segment 9-third arc segment

10-fourth arc segment 11-first contact point 12-second contact point

13-third contact point 14-fourth contact point 15-front cover

16-mounting seat 17-motor mount 18-drive motor

19-screw 20-upper cover 21-side bezel

22-Coupling cover 1'-first groove 2'-second groove

3'-steel ball A-upper contact point B-lower contact point

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIGS. 1 through 6, a linear module includes a base 1 and a movable base 2 slidably disposed on the base 1. Wherein, the base 1 is provided with a guide groove 3, and the lower end of the movable base 2 is provided with a slider 4, and the slider 4 is provided with a slide groove 5 matched with the guide groove 3, the guide groove 3 and the slide concave A ball 6 is disposed between the slots 5, and the rail groove 3 and the ball 6 are in contact with each other at two points, and the slide groove 5 and the ball 6 are in contact with each other.

It can be seen from the above that the linear module of the present invention has two-point contact between the guide groove 3 and the ball 6, and the two-point contact between the slide groove 5 and the ball 6, compared with the prior art. The semi-arc structure module improves the overall rigidity, and at the same time increases the pre-tightening force by increasing the diameter of the ball 6, thereby reducing the backlash of the module and improving the overall running precision of the module.

In a specific embodiment, as shown in FIG. 6, the guide rail groove 3 includes a first circular arc segment 7 and a second circular arc segment 8 connected to the first circular arc segment 7, the slide groove 5 including the third The arc segment 9 and the fourth arc segment 10 connected to the third arc segment 9 form a first contact point 11 and a second between the first arc segment 7 and the second arc segment 8 respectively. At the contact point 12, the ball 6 forms a third contact point 13 and a fourth contact point 14 with the third circular arc segment 9 and the fourth circular arc segment 10, respectively. More specifically, the line between the first contact point 11 and the fourth contact point 14 is perpendicular to the line between the second contact point 12 and the third contact point 13. In this example, the guide rail groove 3 and the slide groove 5 are both formed by two arcs, and the ball 6 is in contact with the guide groove 3 and the slide groove 5 in a direction of 4:45°. The Gothic structure, compared with the two-point 45° contact of the semi-arc structure module in the prior art, not only improves the rigidity, but also reduces the diameter of the ball 6 and reduces the reverse movement of the module back and forth. gap.

In the above embodiment, specifically, two parallel linear guide rails are protruded from the base 1, and the two linear guide rails and the base 1 enclose a U-shaped structure that cooperates with the slider 4. The inner sides of the two linear guide rails are respectively provided with guide rails. The groove 3 and the slide groove 5 are respectively disposed on both sides of the slider 4.

In the above embodiment, specifically, as shown in FIG. 2 and FIG. 3, the front end and the rear end of the base 1 are respectively provided with a front end cover 15 and a fixing seat 16, and the rear side of the fixing base 16 is provided with a motor mounting seat 17, and the motor is mounted. The rear side of the seat 17 is provided with a drive motor 18, and the motor mount 17 is provided with a flexible coupling. The slider 4 is provided with a lead screw 19 for driving the movable base 2 to travel linearly. One end of the lead screw 19 is disposed through the bearing. On the front end cover 15, the other end of the lead screw 19 is passed through a bearing through the fixing seat 16, and the two ends of the elastic coupling are respectively connected to the lead screw 19 and the driving motor 18. As shown in FIG. 3 and FIG. 4, the movable seat 2 is provided with a nut for arranging the lead screw 19, and the lead screw 19 is screwed to the nut.

In a preferred embodiment, as shown in Figures 4 and 5, the movable seat 2, the slider 4, and the lead screw 19 are integrally formed with the wire. The module on the market generally separates the slider 4 from the screw nut and then is screwed together. In this embodiment, the slider 4 and the lead screw 19 and the nut are directly integrated on the movable seat 2, not only the lead screw is ensured. The combination precision of 19 and the silk mother can reduce the combined space volume of the module, reduce the weight of the module, and reduce the material cost. Therefore, the integrated mechanism can make the combined height and overall size of the linear module smaller and more compact, and is more suitable for various industries.

In order to reduce the entry of foreign matter into the interior of the linear module, preferably, as shown in FIG. 2, the upper cover 20 and the side baffle 21 are further included. The upper part of the movable base 2 is provided with a cover passage, and the upper cover 20 is provided with a cover passage. The front and rear ends of the upper cover 20 are respectively connected to the front end cover 15 and the fixed seat 16, and the lower end of the side baffle 21 abuts the base 1. The front and rear ends of the side baffle 21 are respectively connected to the front end cover 15 and the fixed seat 16.

Specifically, the material of the ball 6 is steel, the upper cover 20 is a stainless steel sheet, and the surface of the movable seat 2 is covered with a plastic outer casing. As shown in Figures 2 and 3, the motor mount 17 includes a housing body and a coupling cover 22 that mates with the housing body.

It is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the invention is defined by the appended claims instead All changes in the meaning and scope of equivalent elements are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim.

In addition, it should be understood that although the description is described in terms of embodiments, not every embodiment includes only one independent technical solution. The description of the specification is merely for the sake of clarity, and those skilled in the art should The technical solutions in the respective embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

Claims

A linear module includes a base (1) and a movable seat (2) slidably disposed on the base (1), and the base (1) is provided with a guide groove (3), and the movable seat (2) a lower end is provided with a slider (4), and the slider (4) is provided with a slide groove (5) matched with the guide groove (3), the guide groove (3) and the A ball (6) is disposed between the slide groove (5), wherein the guide groove (3) and the ball (6) are in contact with each other, and the slide groove is (5) There is a two-point contact with the ball (6).
The linear module according to claim 1, characterized in that the guide rail groove (3) comprises a first circular arc segment (7) and a second circular arc segment connected to the first circular arc segment (7) ( 8) The slide groove (5) includes a third circular arc segment (9) and a fourth circular arc segment (10) connected to the third circular arc segment (9), wherein the rolling ball (6) respectively Forming a first contact point (11) and a second contact point (12) with the first circular arc segment (7) and the second circular arc segment (8), the rolling ball (6) respectively A third contact point (13) and a fourth contact point (14) are formed between the third circular arc segment (9) and the fourth circular arc segment (10).
The linear module according to claim 2, wherein a line between the first contact point (11) and the fourth contact point (14) is perpendicular to the second contact point (12) and The connection between the three contact points (13).
The linear module according to claim 1, wherein two parallel linear guide rails are protruded from the base (1), and the guide rail grooves are respectively disposed on the inner sides of the two linear guide rails (3). The slide grooves (5) are respectively disposed on both sides of the slider (4).
The linear module according to any one of claims 1 to 4, characterized in that the front end and the rear end of the base (1) are respectively provided with a front end cover (15) and a fixing seat (16), the fixing base The rear side of the (16) is provided with a motor mount (17), the rear side of the motor mount (17) is provided with a drive motor (18), and the motor mount (17) is provided with a flexible coupling. A screw (19) is disposed in the slider (4) for driving the movable seat (2) to travel linearly, and one end of the screw (19) is disposed on the front end cover (15) through a bearing, the lead screw The other end of (19) is passed through the bearing through the fixing seat (16), and the two ends of the elastic coupling are respectively connected to the lead screw (19) and the driving motor (18).
The linear module according to claim 5, wherein the moving seat (2) is provided with a nut for arranging the lead screw (19), the lead screw (19) and the wire Female threaded connection.
The linear module according to claim 6, wherein the moving seat (2), the slider (4), and the lead screw (19) are integrally formed with the wire.
The linear module according to claim 5, further comprising an upper cover (20) and a side baffle (21), wherein the upper portion of the movable seat (2) is provided with a cover passage, and the upper cover The front and rear ends of the upper cover (20) are respectively connected to the front end cover (15) and the fixing seat (16), and the lower end of the side baffle (21) abuts The base (1), the front and rear ends of the side baffle (21) are respectively connected to the front end cover (15) and the fixing seat (16).
The linear module according to claim 5, wherein the motor mount (17) comprises a case body and a coupling cover (22) that cooperates with the case body.