WO2020118770A1

WO2020118770A1 - Cross-roller guide rail

Info

Publication number: WO2020118770A1
Application number: PCT/CN2018/123435
Authority: WO
Inventors: 刘元江; 周忠厚
Original assignee: 歌尔股份有限公司
Priority date: 2018-12-12
Filing date: 2018-12-25
Publication date: 2020-06-18
Also published as: CN209398733U

Abstract

Disclosed is a cross-roller guide rail, comprising a first guide rail (1) and a second guide rail (2), which are arranged opposite each other, and a holder (3), wherein the holder (3) is provided with rollers (32) in rolling fit with the first guide rail (1) and the second guide rail (2) at the same time; the first guide rail (1) is provided with a coaxial first gear (11) and second gear (12), which rotate synchronously; the second guide rail (2) is provided with a first rack (21) meshed with the first gear (11); the holder (3) is provided with a second rack (31) meshed with the second gear (12); and the rollers (32) are configured in such a way that when the second guide rail (2) slides relative to the first guide rail (1), the meshing between the first gear (11) and the second guide rail (2) and the meshing between the second gear (12) and the holder (3) allow the rollers (32) on the holder (3) to perform a pure rolling motion relative to the first guide rail (1) and the second guide rail (2). The structural design can simplify the structure of the holder, reduce the weight of the holder, and reduce the movement inertia of the holder.

Description

Cross roller guide

Technical field

The utility model belongs to the technical field of mechanical structure. More specifically, the utility model relates to a cross roller guide rail.

Background technique

The cross roller guide is composed of two guide rails with V-shaped raceways, roller cages, cylindrical rollers, etc. Cylindrical rollers arranged cross each other reciprocate on the precision-ground V-shaped raceway surface. Withstand loads in all directions to achieve high-precision and smooth linear motion.

In the prior art, as shown in FIG. 5, in order to prevent the roller cage from creeping in the raceway, an anti-creeping structure is provided. The usual structure is to install an anti-creeping gear on the roller cage, and then Tooth tracks are correspondingly processed in the V-shaped raceways of the two guide rails to prevent the roller cage from creeping in the raceway, so that only when the two guide rails have a tendency to slide against each other, the roller cage will respond and roll. The root rails slide on each other. This anti-creeping structure makes the structure of the roller cage relatively complicated, and the weight inertia is large, resulting in fast wear and short life of the anti-creeping gear, which is easy to cause operating noise.

Therefore, it is necessary to provide an improved cross roller guide.

Utility model content

An object of the utility model is to provide a new technical solution for a cross roller guide.

According to an aspect of the present invention, there is provided a cross roller guide rail, which includes a first guide rail and a second guide rail disposed oppositely, and a retainer disposed between the first guide rail and the second guide rail, the The cage is provided with rollers which are in rolling cooperation with the first guide rail and the second guide rail; the first guide rail is provided with coaxial and synchronously rotating first gears and second gears, and the second guide rails are provided with A first rack that meshes with the first gear, a second rack that meshes with the second gear is provided on the cage, and the roller is configured: when the second rail slides relative to the first rail At this time, the meshing between the first gear and the second rail and the meshing between the second gear and the cage allow the rollers on the cage to perform a pure rolling motion relative to the first and second rails.

Optionally, the first gear and the second gear are made by an integral molding process.

Optionally, the first gear and the second gear are provided on the upper surface of the first guide rail, and the first gear is located above the second gear.

Optionally, the axial direction of the first gear and the second gear is perpendicular to the upper portion of the first guide rail.

Optionally, the end face of the first gear and the end face of the second gear are adjacent to each other.

Optionally, a concave portion is provided on the upper surface of the first rail, and the first gear and the second gear are provided on the concave portion.

Optionally, the depth of the recessed portion is at least greater than or equal to the height of the upper end surface of the second gear from the recessed portion.

Optionally, the cage has a long axis side that is parallel to the rolling advance direction of the roller, and the second rack is disposed on the long axis side of the cage.

Optionally, a plurality of the rollers are provided on the cage, and the axial directions of two adjacent rollers intersect at 90° in the rolling direction of the rollers.

Optionally, a rotation shaft is further included, and the first rack and the second gear are coaxially rotated on the first guide rail through the rotation shaft.

One technical effect of the present invention is that the structural design of the present invention can simplify the structure of the cage, reduce the weight of the cage, and reduce the moving inertia of the cage.

Through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

BRIEF DESCRIPTION

The drawings constituting a part of the description describe the embodiments of the present invention, and together with the description are used to explain the principles of the present invention.

FIG. 1 is a schematic diagram of the structure explosion of some embodiments of the present invention.

Fig. 2 is a schematic diagram of a side view of some embodiments of the present invention.

FIG. 3 is a schematic structural view of a cage in some embodiments of the present invention.

4 is a schematic structural view of an anti-creep gear in some embodiments of the present invention.

5 is a schematic structural view of a cross roller guide in the prior art.

In the picture: 1 first guide rail, 11 first gear, 12 second gear, 13 rotation shaft, 14 recess, 15 rotation mounting hole, 2 second guide rail, 21 first rack, 3 cage, 31 second tooth Article. 32 rollers,

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is actually merely illustrative, and in no way serves as any limitation to the present invention and its application or use.

Techniques and equipment known to those of ordinary skill in the related art may not be discussed in detail, but where appropriate, the techniques and equipment should be considered as part of the specification.

In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, there is no need to discuss it further in subsequent drawings.

The utility model provides a cross roller guide rail. In some embodiments, referring to FIGS. 1 to 4, it includes a first guide rail 1, a second guide rail 2 and a retainer 3. The first rail 1 and the second rail 2 are oppositely arranged. The holder 3 is provided between the first rail 1 and the second rail 2. The cage 3 is provided with a plurality of rollers 32, and both ends of the rollers 32 are respectively located in V-shaped slide grooves on opposite sides of the first rail 1 and the second rail 2 and are connected to the first rail 1 and the second rail 2 simultaneously. Rolling fit. The first guide rail 1 and the second guide rail 2 can slide relatively through the roller 32 on the cage 3.

The first guide rail 1 is provided with a first gear 11 and a second gear 12 which are coaxial and rotate synchronously. The first gear 11 and the second gear 12 are anti-creep gears. The second rail 2 is provided with a first rack 21 that meshes with the first gear 11. The cage 3 is provided with a second rack 31 that meshes with the second gear 12. When the first guide rail 1 and the second guide rail 2 slide relatively, driven by the roller 32, the cage 3 follows the guide rail to slide. Due to the restriction of the coaxial and synchronous rotation of the first gear 11 and the second gear 12, when the second guide rail 2 slides relative to the first guide rail 1, the meshing between the first gear 11 and the second guide rail 2 and the second gear 12 The engagement with the cage 3 allows the rollers 32 on the cage 3 to perform a pure rolling movement relative to the first rail and the second rail.

Further, in some embodiments, the radius of the index circle of the first gear 11 is equal to twice the radius of the index circle of the second gear 12, which ensures that the cage 3 rolls on the cage 3 when it moves with the guide rail When the movement of the column 32 is always in a rolling state; when the first guide rail 1 and the second guide rail 2 stop moving and remain relatively still, the cage 3 can also stop moving and remain stationary without creeping.

The anti-creep gear is installed on the guide rail, and there is no need to set the mounting position corresponding to the anti-creep gear on the cage 3. The cage 3 only needs to maintain the stability of the roller 32, which can simplify the structure of the cage 3 and reduce the maintenance. The weight of the cage 3 reduces the moving inertia of the cage 3, making the cage 3 suitable for high-speed operation.

Further, the anti-creep gear is fixed relative to a guide rail, which can improve its structural accuracy and reduce running noise; in addition, the rotation shaft of the anti-creep gear is moved from the cage to the guide rail, and the anti-creep gear is provided on the cage relative to the anti-creep gear. Effectively reduce the impact of the moving inertia of the cage on the rotation shaft of the anti-creep gear, reduce the wear on the anti-creep gear, and reduce the running noise.

In some embodiments, referring to FIG. 4, the first gear 11 and the second gear 12 are made by an integral molding process, so that the anti-creep gear formed by the first gear 11 and the second gear 12 is a double-layer with double-layer external teeth Compared with the split anti-creep gear structure that needs to be assembled, the utility model can reduce the assembly steps, improve its structural strength and can always maintain synchronous coaxial rotation.

In some embodiments, referring to FIGS. 1 and 2, the first guide rail 1 is equipped with a rotating shaft 13. The first guide rail 1 is provided with a rotation installation hole 15, and the rotation shaft 13 is rotatably installed in the rotation installation hole 15. The first rack 21 and the second gear 12 may be assembled on the first guide rail 1 through the rotating shaft 13. Further, the first rack 21 and the second gear 12 can also be integrally formed with the rotating shaft 13.

In some embodiments, referring to FIGS. 1 and 2, the first gear 11 and the second gear 12 are provided on the upper surface of the first guide rail 1. Compared with the prior art where the anti-creep gear is arranged on the cage, the anti-creep gear of the present invention is arranged on the upper surface of the first guide rail 1 and can be removed without integrally disassembling its cross roller guide rail mechanism Check the anti-creep gear.

The first gear 11 is higher than the second gear 12. Compared with the prior art in which racks are opened in the V-shaped slide grooves of the two opposite guide rails, the present invention makes the first rack 21 on the second guide rail 2 disposed on the upper part of the second guide rail 2 and the first guide rail 1 On the opposite side wall, the first rack 21 can be exposed, which is convenient for observation, maintenance and processing; it can improve the processing accuracy, reduce the impact noise during operation, and extend the life of the guide rail.

In some embodiments, referring to FIG. 2, the axial direction of the first gear 11 and the second gear 12 is perpendicular to the upper portion of the first guide rail 1 and perpendicular to the sliding direction of the first guide rail 1 and the second guide rail 2, which is convenient for structural design and Processing. In other embodiments, the axial direction of the first gear 11 and the second gear 12 may not be perpendicular to the upper portion of the first guide rail 1, but may be perpendicular to the sliding direction of the opposite two guide rails in other directions. This application does not limit this.

In some embodiments, referring to FIGS. 2 and 4, the diameter of the first gear 11 is larger than the diameter of the second gear 12. The first gear 11 and the second gear 12 are easy to disassemble upward along the first guide rail 1 without There are structural obstacles. Further, the lower end surface of the first gear 11 can be meshed with the first rack 21 across the cage 3, and the first rack 21 does not need to protrude outward in the direction closer to the first guide rail 1 so that the second guide rail 2 becomes a second shaped guide.

In some embodiments, referring to FIG. 4, the end face of the first gear 11 and the end face of the second gear 12 are adjacent to each other, simplifying the structure. In other embodiments, the first gear may be provided on the upper surface of the first guide rail, and the second gear may be fixedly connected to the lower surface of the first guide rail through the same rotating shaft. The second guide rail and the cage are respectively The first rack and the second rack can also be implemented correspondingly, and the present invention is not limited thereto.

In some embodiments, referring to FIGS. 1 and 2, the upper surface of the first guide rail 1 is provided with a recessed recessed portion 14, and the first gear 11 and the second gear 12 are disposed on the recessed portion 14. The influence of a gear 11 and a second gear 12 on the height of the first guide rail 1.

In some embodiments, referring to FIGS. 1 and 2, the depth of the recessed portion 14 is at least greater than or equal to the height of the upper end surface of the second gear 12 from the recessed portion 14, so that the outer shape of the cage 3 is located on the first rail 1 and the second rail The inside between 2 does not need to exceed the surface of the first guide rail 1 to prevent the cage 3 from being interfered by the outside and hindering the relative movement of the first guide rail 1 and the second guide rail 2.

In some embodiments, referring to FIGS. 1 and 3, the main body of the cage 3 is a plate-like structure, and the main body of the cage 3 has a long axis side parallel to the rolling direction of the roller 32, that is, parallel to the second guide rail 2 On the long-axis side of the sliding direction, the second rack 31 is provided on the long-axis side of the cage 3 on the upper side to mesh with the second gear 12. Further, the external teeth of the second rack 31 extend outward along the plate surface of the main body of the cage 3.

In some embodiments, referring to FIGS. 1 and 3, the axial directions of two adjacent rollers 32 are crossed at 90° in the rolling direction of the rollers 32, and can withstand loads in various directions to achieve high accuracy and Smooth linear motion.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

A cross-roller guide rail, characterized in that it includes a first guide rail and a second guide rail disposed oppositely, and a holder disposed between the first guide rail and the second guide rail, and the holder is provided with At the same time, rollers that are in rolling cooperation with the first guide rail and the second guide rail; the first guide rail is provided with coaxial and synchronously rotating first gears and second gears, and the second guide rail is provided with the first gear A first rack gear engaged with a gear, a second rack gear meshed with the second gear is provided on the cage, the roller is configured: when the second guide rail slides relative to the first guide rail, the first gear The engagement with the second guide rail and the engagement between the second gear and the cage allow the rollers on the cage to perform a pure rolling movement relative to the first guide rail and the second guide rail.
The cross roller guide according to claim 1, wherein the first gear and the second gear are made by an integral molding process.
The cross roller guide according to claim 1 or 2, wherein the first gear and the second gear are provided on an upper surface of the first guide, and the first gear is located on the Above the second gear.
The cross roller guide according to claim 3, wherein the axial direction of the first gear and the second gear is perpendicular to the upper portion of the first guide.
The cross roller guide according to claim 3, wherein the end surface of the first gear and the end surface of the second gear are adjacent to each other.
The cross roller guide according to claim 3, wherein a concave portion is provided on the upper surface of the first guide, and the first gear and the second gear are provided on the concave portion .
The cross roller guide according to claim 6, wherein the depth of the recessed portion is at least greater than or equal to the height of the upper end surface of the second gear from the recessed portion.
The cross roller guide according to claim 1 or 2, characterized in that the cage has a long axis side parallel to the rolling advance direction of the roller, and the second rack is provided on the cage On the long axis.
The cross roller guide according to claim 1 or 2, wherein the cage is provided with a plurality of the rollers, and the axial direction of the two adjacent rollers is in the rolling direction of the rollers The upper cross is 90°.
The cross roller guide according to claim 1 or 2, further comprising a rotating shaft, and the first rack and the second gear are mounted on the first guide rail coaxially through the rotating shaft Turn.