Reverse planetary lead screw assembly

Abstract

The utility model discloses a reverse planetary lead screw assembly which comprises a rotating rod, a planetary nut and a planetary roller, one end of the rotating rod is provided with a mounting mechanism, the planetary roller is rotatably connected with the rotating rod through the mounting mechanism, and the thread part of the planetary roller is only in threaded connection with the internal thread of the planetary nut; the installation mechanism comprises a locking piece, a lower cover plate and an upper cover plate, the lower cover plate and the upper cover plate are oppositely arranged up and down, the planetary roller is located between the upper cover plate and the lower cover plate, the upper cover plate and the lower cover plate are respectively provided with shaft holes which are in one-to-one correspondence, and non-threaded parts at the two ends of the planetary roller are respectively connected with the shaft holes of the upper cover plate and the lower cover plate. During assembly, the planetary pin roller is connected with the rotating rod through the mounting mechanism, then the whole formed by the planetary pin roller and the rotating rod is screwed with the internal thread of the planetary nut through the thread part of the planetary pin roller, the structure is simple, parts and procedures are reduced, the assembly difficulty is small, the assembly efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment accessories, in particular to a reverse planetary screw assembly. Background Art

[0002] In the planetary roller screw of the prior art, the planetary rollers need to be installed on the planetary nut through multiple parts and multiple processes, and then the planetary screw is assembled with the assembled planetary nut and planetary rollers; and during the assembly process of the planetary roller screw, the external threads of the planetary rollers, the planetary screw and the internal threads of the planetary nut need to be screwed together at the same time, which makes the assembly difficult and the process cumbersome and complicated, affecting the production efficiency and production cost of the planetary roller screw.

[0003] Therefore, it is necessary to develop a reverse planetary screw assembly, in which an installation mechanism for installing planetary rollers is set on the rotating rod. During assembly, the planetary rollers and the rotating rod are installed to form a whole, and then the threaded part of the planetary roller is screwed with the internal thread of the planetary nut. The structure is simple, the parts and processes are reduced, the assembly difficulty is small, the assembly efficiency is improved, and the production cost is reduced. Utility Model Content

[0004] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0005] A reverse planetary screw assembly, comprising a rotating rod, a planetary nut and a planetary roller, characterized in that a mounting mechanism is provided at one end of the rotating rod, the planetary roller is rotatably connected to the rotating rod through the mounting mechanism, and the threaded portion of the planetary roller is only threadedly connected to the internal thread of the planetary nut;

[0006] The planetary rollers are provided in plurality and are distributed in a circle with the axis of the rotating rod as the center.

[0007] Furthermore, the mounting mechanism includes a locking member and a lower cover plate and an upper cover plate that are arranged opposite to each other up and down, the planetary roller is located between the upper cover plate and the lower cover plate, and the upper cover plate and the lower cover plate are respectively provided with corresponding axial holes, and the non-threaded parts at both ends of the planetary roller are respectively connected to the axial holes of the upper cover plate and the lower cover plate.

[0008] Furthermore, the lower cover plate is formed integrally with the rotating rod, the upper cover plate is detachably connected to the rotating rod via a locking member, and the upper cover plate is non-rotatably connected to the rotating rod.

[0009] Furthermore, a connecting portion is provided at the connection between the rotating rod and the upper cover plate, the connecting portion is a polygonal column structure, a through hole connected to the connecting portion is provided in the upper cover plate, and the locking member is connected to the connecting portion.

[0010] Furthermore, a threaded hole threadedly connected to the locking member is formed on the surface of one end of the connecting portion away from the rotating rod, and the thickness of the upper cover plate is greater than the height of the connecting portion.

[0011] Furthermore, the locking member is a bolt.

[0012] Furthermore, the inner side wall of the port of the planetary nut close to the planetary roller is provided with matching holes corresponding one to one with the planetary rollers.

[0013] Furthermore, the outer surfaces of the rotating rod and the planetary nut are provided with anti-slip grooves.

[0014] Furthermore, the planetary nut is a structure having a length.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model is provided with an installation mechanism for installing the planetary roller on the rotating rod. During assembly, the planetary roller and the rotating rod are installed to form a whole, and then the threaded part of the planetary roller is screwed with the internal thread of the planetary nut. The structure is simple, the parts and processes are reduced, the assembly difficulty is small, the assembly efficiency is improved, and the production cost is reduced.

[0017] 2. Anti-skid grooves are arranged on the outer surfaces of the rotating rod and the planetary nut to increase the friction between the force-applying part and the rotating rod and the planetary nut, so that the assembly of the rotating rod, the planetary roller and the planetary nut is labor-saving and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is one of the explosion diagrams of the utility model;

[0019] Figure 2 This is the second explosion diagram of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged schematic diagram in the middle;

[0021] Among them: a rotating rod 1, a planetary nut 2, a planetary roller 3, a mounting mechanism 4, a connecting portion 11, a threaded hole 12, a matching hole 21, a locking piece 41, a lower cover plate 42, an upper cover plate 43, an axial hole 10, an anti-slip pattern 20, and a through hole 431. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0026] like Figure 1-3 As shown, a reverse planetary screw assembly includes a rotating rod 1, a planetary nut 2 and a planetary roller 3. A mounting mechanism 4 is provided at one end of the rotating rod 1. The planetary roller 3 is rotatably connected to the rotating rod 1 through the mounting mechanism 4. The threaded portion of the planetary roller 3 is only threadedly connected to the internal thread of the planetary nut 2.

[0027] The planetary rollers 3 are provided in plurality and are distributed in a circle with the axis of the rotating rod 1 as the center.

[0028] In this embodiment, during assembly, the planetary roller 3 is connected to the rotating rod 1 through the mounting mechanism 4, and then the whole formed by the planetary roller 3 and the rotating rod 1 is screwed together with the internal thread of the planetary nut 2 through the threaded portion of the planetary roller 3. Compared with the structure in the prior art in which the planetary roller 3 is assembled with the planetary nut 2 and then assembled with the lead screw, the structure is simple, the parts and processes are reduced, the assembly difficulty is small, the assembly efficiency is improved, and the production cost is reduced.

[0029] Further, such as Figure 1 , 2 As shown, in order to realize the stable rotation connection between the planetary roller 3 and the rotating rod 1, the mounting mechanism 4 includes a locking member 41 and a lower cover plate 42 and an upper cover plate 43 arranged opposite to each other up and down, the planetary roller 3 is located between the upper cover plate 43 and the lower cover plate 42, and the upper cover plate 43 and the lower cover plate 42 are respectively provided with corresponding shaft holes 10, and the non-threaded parts at both ends of the planetary roller 3 are respectively connected to the shaft holes 10 of the upper cover plate 43 and the lower cover plate 42; the lower cover plate 42 and the upper cover plate 43 are not rotationally connected to the rotating rod 1.

[0030] Further, such as Figure 1 , 2 As shown, in order to facilitate assembly, reduce assembly processes and parts, and improve assembly efficiency, the lower cover plate 42 is formed integrally with the rotating rod 1, and the upper cover plate 43 is detachably connected to the rotating rod 1 through a locking member 41, and the upper cover plate 43 is non-rotatably connected to the rotating rod 1.

[0031] Further, such as Figure 1 , 2 As shown, in order to limit the freedom of rotation of the upper cover plate 43 relative to the rotating rod 1 and improve reliability, a connecting portion 11 is provided at the connection between the rotating rod 1 and the upper cover plate 43. The connecting portion 11 is a polygonal column structure. A through hole 431 connected to the connecting portion 11 is opened in the upper cover plate 43, and the locking member 41 is connected to the connecting portion 11.

[0032] Further, such as Figure 1 , 2 As shown, in order to ensure that the upper cover plate 43 is stably and reliably connected to the rotating rod 1, a threaded hole 12 threadedly connected to the locking member 41 is provided on the end surface of the connecting portion 11 away from the rotating rod 1, and the thickness of the upper cover plate 43 is greater than the height of the connecting portion 11.

[0033] Furthermore, the locking member 41 is a bolt.

[0034] Further, such as Figure 2 , 3 As shown, the inner side wall of the port of the planetary nut 2 close to the planetary roller 3 is provided with matching holes 21 corresponding to the planetary rollers 3 one by one.

[0035] In this embodiment, during installation, the planetary rollers 3 are aligned one-to-one with the matching holes 21 for quick alignment before assembly, thereby improving the assembly efficiency and effect of the rotating rod 1, the planetary rollers 3 and the planetary nuts 2.

[0036] Further, such as Figure 1 , 2 As shown, the outer surfaces of the rotating rod 1 and the planetary nut 2 are provided with anti-slip grooves 20 .

[0037] In this embodiment, when the rotating rod 1 and the planetary roller 3 are assembled with the planetary nut 2, it is necessary to apply external forces to the rotating rod 1 and the planetary nut 2 to drive the planetary roller 3 to rotate and drive the rotating rod 1 to move axially relative to the planetary nut 2. Therefore, in order to save effort and quickly assemble the rotating rod 1 and the planetary roller 3 with the planetary nut 2, anti-slip grooves 20 are provided to increase the friction between the force-applying part and the rotating rod 1 and the planetary nut 2.

[0038] Further, such as Figure 1 , 2As shown, the planetary nut 2 is a structure having a length.

[0039] In this embodiment, the planetary nut 2 can be used as the push rod part of the electric cylinder, thereby saving the connection structure of the push rod that is separately set up and being more integrated.

[0040] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A reverse planetary screw assembly, comprising a rotating rod, a planetary nut and a planetary roller, characterized in that: One end of the rotating rod is provided with a mounting mechanism, the planetary roller is rotatably connected to the rotating rod through the mounting mechanism, and the threaded portion of the planetary roller is only threadedly connected to the internal thread of the planetary nut; The planetary rollers are provided in plurality and are distributed in a circle with the axis of the rotating rod as the center.

2. A reverse planetary screw assembly according to claim 1, characterized in that: The mounting mechanism includes a locking member and a lower cover plate and an upper cover plate arranged opposite to each other up and down. The planetary roller is located between the upper cover plate and the lower cover plate. The upper cover plate and the lower cover plate are respectively provided with corresponding axial holes. The non-threaded parts at both ends of the planetary roller are respectively connected to the axial holes of the upper cover plate and the lower cover plate.

3. A reverse planetary screw assembly according to claim 2, characterized in that: The lower cover plate is formed integrally with the rotating rod, the upper cover plate is detachably connected to the rotating rod via a locking member, and the upper cover plate is non-rotatably connected to the rotating rod.

4. A reverse planetary screw assembly according to claim 3, characterized in that: A connecting part is provided at the connection between the rotating rod and the upper cover plate. The connecting part is a polygonal column structure. A through hole connected to the connecting part is provided in the upper cover plate. The locking member is connected to the connecting part.

5. A reverse planetary screw assembly according to claim 4, characterized in that: A threaded hole threadedly connected to a locking member is formed on the surface of one end of the connecting portion away from the rotating rod, and the thickness of the upper cover plate is greater than the height of the connecting portion.

6. A reverse planetary screw assembly according to any one of claims 2 to 5, characterized in that: The locking member is a bolt.

7. A reverse planetary screw assembly according to claim 1, characterized in that: The inner side wall of the port of the planetary nut close to the planetary roller is provided with matching holes corresponding to the planetary rollers one by one.

8. A reverse planetary screw assembly according to claim 1, characterized in that: The outer surfaces of the rotating rod and the planetary nut are provided with anti-slip grooves.

9. A reverse planetary screw assembly according to claim 1, 7 or 8, characterized in that: The planetary nut is a structure having a length.

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