Screw and nut transmission structure

Abstract

The utility model belongs to the technical field of transmission equipment, and particularly relates to a screw and nut transmission structure which comprises a guide screw, a nut and a nut, an internal thread is arranged in the nut; the nut further comprises a main body part, the main body part is made of metal and used for providing the structural strength of the nut, and the internal threads are arranged in the main body part. The plastic lining covers the internal thread, and the plastic lining comprises an outer side thread and an inner side thread; the scraper is detachably arranged at the end part of the main body part and is used for removing foreign matters on the surface of the guide screw rod; wherein the guide screw drives the nut to move through meshing of the outer thread and the inner side thread, compared with the prior art, the screw nut transmission structure has the advantages that the problems of strength and friction heating are effectively considered, meanwhile, impurities attached to the surface of the screw can be effectively cleaned, and the working stability of the screw nut transmission structure is improved.

Description

Technical Field

[0001] This utility model belongs to the field of transmission equipment technology, and in particular relates to a screw and nut transmission structure. Background Technology

[0002] The screw-nut transmission structure is a common linear guide transmission structure, which usually consists of a guide screw and a nut that mates with the guide screw. For example, the screw-nut transmission mechanism disclosed in patent application number CN201621108461.1 includes a nut and a screw, the threaded portion of the screw passes through the nut, and at least one through slot is provided in the nut, the size of which matches the threaded portion of the screw.

[0003] In the existing screw and nut drive structure, the nut is usually made of metal. However, pure metal nuts are prone to friction noise and overheating during use, while plastic nuts have insufficient strength and are easily damaged. It is difficult to achieve both, so it is necessary to make improvements. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a screw and nut transmission structure that reduces nut friction noise and heat generation while ensuring the strength and durability of the nut.

[0005] In view of this, the present invention provides a screw and nut transmission structure, comprising:

[0006] A guide screw, wherein the outer surface of the guide screw is provided with an external thread;

[0007] Nut, wherein the nut has internal threads;

[0008] The nut also includes:

[0009] The main body, which is made of metal, is used to provide structural strength for the nut, and the internal thread is built into the main body.

[0010] A plastic liner covering an internal thread, the plastic liner comprising an external thread and an internal thread;

[0011] A scraper, detachably mounted at the end of the main body, is used to remove foreign matter from the surface of the guide screw;

[0012] The guide screw drives the nut to move through the engagement of the external thread and the internal thread.

[0013] In this technical solution, the screw and nut transmission structure provides strength through a metal main body and reduces friction through a plastic liner during use. By combining these two materials, the strength of the screw and nut transmission structure is ensured while reducing friction noise and heat generation, effectively balancing strength and frictional heat generation. At the same time, the scraper can effectively clean impurities adhering to the screw surface, improving the working stability of the screw and nut transmission structure.

[0014] Furthermore, the above technical solution also includes:

[0015] The positioning part includes a positioning groove disposed on the inner side of the main body and a positioning protrusion disposed on the outer side of the plastic liner;

[0016] The positioning groove engages with the positioning protrusion to prevent the plastic liner from rotating with the guide screw.

[0017] Furthermore, the above technical solution also includes:

[0018] The blocking part includes a filling hole disposed inside the main body and a blocking member disposed outside the plastic liner;

[0019] The blocking member, in conjunction with the filling hole, is used to fix the plastic liner and prevent it from swaying axially and radially.

[0020] In the above technical solution, the scraper further includes:

[0021] A ring-shaped body having an outer ring surface, an inner ring surface, and two outer peripheral side surfaces;

[0022] A scraper, located on the outer peripheral side, is used to remove foreign matter from the surface of the guide screw;

[0023] The assembly groove is formed by a recess in the outer ring surface on the outer peripheral surface and has an axial through-hole that penetrates the annular body.

[0024] The end face of the main body is provided with a mounting groove that mates with the annular body and a fixing screw hole that mates with the through hole.

[0025] In the above technical solution, the blocking member is further shaped as a cone.

[0026] The beneficial effects of this utility model are:

[0027] 1. By combining the main body and the plastic liner, frictional noise and heat generation are reduced while ensuring the strength of the screw and nut transmission structure;

[0028] 2. The cooperation between the positioning part and the blocking part improves the stability of the fit between the main body and the plastic liner;

[0029] 3. The scraper effectively cleans impurities adhering to the screw surface, improving the working stability of the screw and nut transmission structure. At the same time, the scraper has an integrated ring structure, which facilitates maintenance and ensures high working stability. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0032] Figure 2 This is a schematic diagram of the internal structure of the screw and nut transmission structure of this utility model.

[0033] Figure 3 This is a schematic diagram of the blocking part structure of this utility model.

[0034] Figure 4 This is a schematic diagram of the positioning part of this utility model.

[0035] Figure 5 This is a schematic diagram of the scraper structure of this utility model.

[0036] The markings in the diagram are as follows:

[0037] 1. Nut; 2. Internal thread; 3. Main body; 4. Plastic liner; 40. External thread; 41. Internal thread; 5. Scraper; 50. Ring body; 51. Outer ring surface; 52. Inner ring surface; 53. Outer peripheral side surface; 54. Scraper body; 55. Assembly groove; 56. Through hole; 6. Positioning groove; 7. Positioning protrusion; 8. Filling hole; 9. Blocking component. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] In one embodiment of this utility model, a screw and nut transmission structure includes: a guide screw, the outer surface of which is provided with an external thread; and a nut 1, the nut 1 having an internal thread 2.

[0041] Nut 1 also includes: a body 3, which is made of metal to provide structural strength for nut 1, with internal thread 2 embedded in the body 3; a plastic liner 4, which covers internal thread 2 and includes an outer thread 40 and an inner thread 41; and a scraper 5, which is detachably disposed at the end of the body 3 for removing foreign matter from the surface of the guide screw.

[0042] The guide screw drives the nut 1 to move through the engagement of the external thread and the internal thread 41.

[0043] Preferably, the main body 3 can be made of stainless steel, copper, iron or conventional alloy materials. The main body 3 is tubular and has a hole in the center for the screw to pass through. The internal thread 2 is arranged on the inner wall of the hole. The plastic liner 4 can be made of common plastic materials such as polyoxymethylene, polyphenylene sulfide, thermoplastic polyimide, polybenzimidazole or polyetheretherketone and formed in the main body 3 by insert molding process.

[0044] In this embodiment, during use, the screw and nut 1 transmission structure provides strength through the main body 3 made of metal and reduces friction through the plastic liner 4. By using the combination of the two materials, the strength of the screw and nut 1 transmission structure is guaranteed while reducing friction noise and heat generation, effectively balancing the issues of strength and frictional heat generation. At the same time, the scraper 5 can effectively clean the impurities attached to the screw surface, improving the working stability of the screw and nut 1 transmission structure.

[0045] In another embodiment of the present invention, it further includes: a positioning part, which includes a positioning groove 6 disposed on the inner side of the main body 3 and a positioning protrusion 7 disposed on the outer side of the plastic liner 4;

[0046] The positioning groove 6 engages with the positioning protrusion 7 to prevent the plastic liner 4 from rotating with the guide screw.

[0047] It also includes: a blocking part, which includes a filling hole 8 disposed inside the main body 3 and a blocking member 9 disposed outside the plastic liner 4;

[0048] The blocking element 9 cooperates with the filling hole 8 to fix the plastic liner 4 and prevent it from axial and radial shaking.

[0049] The blocking component 9 is conical.

[0050] Preferably, the main body 3 has a plurality of positioning grooves 6 in the axial direction. The positioning grooves 6 extend and are distributed along the axial direction of the main body 3 and pass through the internal thread 2. The corresponding positioning protrusions 7 are multiple and formed on the outside of the plastic liner 4. The filling holes 8 are arranged in the radial direction of the main body 3. The filling holes 8 can communicate with the positioning grooves 6 according to the actual situation. The blocking member 9 can be formed by plastic liquid being filled into the filling holes 8 and then solidifying.

[0051] In this embodiment, during use, the positioning protrusion 7 and the positioning groove 6 engage with the screw nut 1 transmission structure, ensuring that the plastic liner 4 does not rotate with the screw when the main body 3 is in operation. This improves the working stability of the screw nut 1 transmission structure. At the same time, the blocking member 9 and the filling hole 8 cooperate to further increase the axial and radial fixation of the plastic liner 4 and the main body 3 support, thereby further improving the working stability of the screw nut 1 transmission structure.

[0052] In another embodiment of the present invention, the scraper 5 further includes: an annular body 50, the annular body 50 having an outer annular surface 51, an inner annular surface 52 and two outer peripheral side surfaces 53; a scraping body 54, the scraping body 54 being located on the outer peripheral side surface 53 for removing foreign matter from the surface of the guide screw; and a mounting groove 55, the mounting groove 55 being formed by recessing from the outer annular surface 51 to the outer peripheral surface and having a through hole 56 axially penetrating the annular body 50 inside the mounting groove 55.

[0053] The end face of the main body 3 is provided with a mounting groove that mates with the annular body 50 and a fixing screw hole that mates with the through hole 56.

[0054] Preferably, the scraper 5 can be made of different materials, such as soft resin or metal, depending on the actual usage requirements.

[0055] In this embodiment, the scraper 5 forms an integrated annular structure through the annular body 50. The mounting groove 55 for installation and the scraper body 54 for scraping off impurities are both integrated on the annular body 50. During installation, the mounting groove 55 and the through hole 56 allow tools to be inserted and applied force, which facilitates quick disassembly and assembly. After installation, the integrated scraper 5 can effectively reduce the sharing of vibration and loosening, and improve the installation stability of the scraper 5. During the operation of the screw, the scraper body 54 adheres to the surface of the screw to scrape off the impurities attached to the surface of the screw.

[0056] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A screw-nut transmission structure, comprising: A guide screw, wherein the outer surface of the guide screw is provided with an external thread; Nut (1), wherein the nut (1) has an internal thread (2) inside; The nut (1) is characterized in that it further includes: The main body (3) is made of metal to provide structural strength for the nut (1), and the internal thread (2) is built into the main body (3); A plastic liner (4) covering an internal thread (2), the plastic liner (4) including an external thread (40) and an internal thread (41); A scraper (5) is detachably disposed at the end of the main body (3) for removing foreign matter from the surface of the guide screw; The guide screw drives the nut (1) to move by engaging the external thread with the internal thread (41).

2. The screw-nut transmission structure according to claim 1, characterized in that, Also includes: The positioning part includes a positioning groove (6) disposed inside the main body (3) and a positioning protrusion (7) disposed outside the plastic liner (4); The positioning groove (6) engages with the positioning protrusion (7) to prevent the plastic liner (4) from rotating with the guide screw.

3. The screw-nut transmission structure according to claim 2, characterized in that, Also includes: The blocking part includes a filling hole (8) disposed inside the main body (3) and a blocking member (9) disposed outside the plastic liner (4); The blocking member (9) cooperates with the filling hole (8) to fix the plastic liner (4) and prevent it from shaking axially and radially.

4. The screw and nut transmission structure according to claim 1, characterized in that, The scraper (5) also includes: An annular body (50) having an outer annular surface (51), an inner annular surface (52), and two outer peripheral side surfaces (53); A scraper (54) located on the outer peripheral side (53) is used to remove foreign matter from the surface of the guide screw; Assembly groove (55), the assembly groove (55) is formed by the outer ring surface (51) recessed towards the outer peripheral surface and the assembly groove (55) has a through hole (56) axially penetrating the annular body (50) inside; The main body (3) has an installation groove that mates with the annular body (50) and a fixing screw hole that mates with the through hole (56) on its end face.

5. A screw-nut transmission structure according to claim 3, characterized in that: The blocking element (9) is conical.

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