Lead screw spline shaft protective cover structure of horizontal multi-joint robot

Abstract

The utility model relates to a lead screw spline shaft protective cover structure of a horizontal multi-joint robot, which comprises a second connecting rod part, a lead screw spline shaft is arranged at the front end of a second connecting rod shell in a penetrating manner, and a lead screw spline shaft protective cover is sleeved outside the lead screw spline shaft. The lead screw spline shaft protective cover is sequentially provided with a lead screw cover upper piece, a lead screw cover middle piece and a lead screw cover lower piece from top to bottom. By arranging the lead screw cover upper piece, the lead screw cover middle piece and the lead screw cover lower piece, if lead screw spline shafts with different strokes need to be replaced, only the lead screw cover middle pieces with different sizes need to be replaced, the height of the whole protective cover assembly can be adjusted, cost is saved, mold opening is not needed again, and the stroke of the lead screw spline shafts can be flexibly changed; meanwhile, the lead screw spline shaft protective cover is divided into three parts and can stretch out and draw back freely, the lead screw spline shaft can be better protected, partial stroke of the lead screw spline shaft cannot be occupied, and the actual stroke of the lead screw spline shaft cannot be shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial robot equipment technical field especially relates to a horizontal multi -joint type robot's lead screw spline shaft protection cover structure. BACKGROUND

[0002] With the development of society and the progress of science and technology, robots have been widely used in production and life to replace or assist human to complete various work.

[0003] In the horizontal multi -joint type (SCARA) robot design, the function of the lead screw spline shaft protection cover of the horizontal multi -joint type robot is mainly to protect the lead screw spline shaft from the damage of external environment and ensure that the lead screw spline shaft does not knock during the movement.

[0004] Usually, the lead screw spline shaft protection cover of the horizontal multi -joint type robot on the market has two forms:

[0005] The first kind of injection molding integrated protection mode cannot flexibly change the lead screw spline shaft stroke. This injection molding integrated protection mode needs to determine the stroke of the lead screw spline shaft in advance, and the lead screw spline shaft cannot be replaced with longer stroke at any time. If the lead screw spline shaft with longer stroke is replaced, the mold needs to be re-opened, which is expensive.

[0006] The second kind of protection cover is separately used in the telescopic type, which cannot prevent the lead screw spline shaft from knocking. Although the telescopic type lead screw spline shaft protection cover does not limit the stroke of the lead screw spline shaft and can replace the longer stroke at any time, due to the telescopic property of the protection cover material, a relatively soft material must be used as the protection cover material, which cannot prevent the lead screw spline shaft from knocking, and the protection cover of this type needs to occupy a part of the stroke of the lead screw spline shaft after compression, resulting in the actual stroke being shortened. SUMMARY

[0007] The utility model aims at solving the above -mentioned problem, and provides a new type of horizontal multi -joint type robot's lead screw spline shaft protection cover structure which can not limit the stroke of the lead screw spline shaft, can replace the longer stroke at any time, can prevent the lead screw spline shaft from knocking and does not occupy the stroke of the lead screw spline shaft.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A lead screw spline shaft protection cover structure of a horizontal multi -joint type robot, comprising a second connecting rod part, the second connecting rod part comprises a second connecting rod shell, a lead screw spline shaft is provided at the front end of the second connecting rod shell, and a lead screw spline shaft protection cover for protecting the lead screw spline shaft is provided on the lead screw spline shaft.

[0010] In the embodiment, the second connecting rod shell upper surface is fixed with a screw nut mounting seat, and at least one first screw is arranged at the four corners of the screw nut mounting seat, and the first screw is used for fixing the screw nut mounting seat on the second connecting rod shell.

[0011] In the embodiment, the screw nut mounting seat is sleeved with a screw nut, and the screw nut is used for sleeving a screw key shaft in the inner wall thereof.

[0012] In the embodiment, the screw key shaft protective cover is sequentially provided with a screw cover upper part, a screw cover middle part and a screw cover lower part from top to bottom.

[0013] In the embodiment, the aperture size of the upper end of the screw cover lower part is smaller than the aperture size of the lower end, the bottom end of the screw cover lower part is used for sleeving the screw nut mounting seat in the screw cover lower part, and the screw cover lower part is fixed on the second connecting rod shell upper surface through the second screw.

[0014] In the embodiment, the lower end of the screw cover middle part is connected with the upper end of the screw cover lower part, and the upper end of the screw cover middle part is connected with the lower end of the screw cover upper part.

[0015] In the embodiment, the screw cover middle part is provided with at least one, and the screw cover middle part is an equal cross-section cylinder.

[0016] In the embodiment, the screw cover upper part and the screw cover lower part are integrally formed by injection molding.

[0017] In the embodiment, the screw key shaft protective cover is located at the middle upper segment of the outer surface of the screw key shaft.

[0018] Compared with the prior art, the screw key shaft protective cover structure of the horizontal multi-joint robot has the following beneficial effects:

[0019] 1. The screw key shaft protective cover is divided into three parts: a screw cover upper part, a screw cover middle part and a screw cover lower part, wherein the screw cover lower part and the screw cover upper part are injection molding products, and the screw cover middle part adopts an equal cross-section body mold. If different stroke screw key shafts are required to be replaced, only the screw cover middle part in the middle part needs to be replaced with a screw cover middle part of different sizes, so that the height of the entire protective cover assembly can be adjusted. In this way, only the screw cover middle part needs to be replaced, and the screw cover lower part and the screw cover upper part do not need to be replaced. The length of the screw cover middle part can be adjusted as required, and when different stroke screw key shafts are used, compared with the injection integrated protective cover, the cost has a great advantage.

[0020] 2、Meanwhile, the screw key shaft protective cover is divided into three parts, which can be freely extended and retracted, can better protect the screw key shaft, and will not occupy part of the stroke of the screw key shaft, and will not cause the actual stroke of the screw key shaft to be shortened;

[0021] 3、By the screw cover lower piece upper end aperture size is less than the lower end aperture size, the bottom end of the screw cover lower piece can be sleeved with the screw nut mounting seat in the screw cover lower piece, and the stability of the screw key shaft during operation is better protected;

[0022] 4、By setting the screw nut mounting seat and the screw nut, the screw key shaft can be better protected, the screw key shaft is prevented from shaking during operation, and the stability of the screw key shaft during operation is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and other objects, features and advantages of the exemplary embodiments of the present disclosure will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present disclosure are shown by way of example, and wherein the same or corresponding elements are referred to by the same or corresponding reference numerals. In the drawings:

[0024] Fig. 1 is a cross-sectional view of the screw key shaft protective cover structure of the horizontal multi-joint robot of the utility model;

[0025] Fig. 2 is an explosion view of the screw key shaft protective cover structure of the horizontal multi-joint robot of the utility model in a short stroke state;

[0026] Fig. 3 is an explosion view of the screw key shaft protective cover structure of the horizontal multi-joint robot of the utility model in a long stroke state;

[0027] Reference signs: 300, second connecting rod part; 301, second connecting rod shell; 302, screw key shaft; 303, screw cover lower piece; 304, screw cover middle piece; 305, screw cover upper piece; 306, second screw; 307, screw nut mounting seat; 308, first screw; 309, screw nut; 310, screw key shaft protective cover. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Traditional horizontal multi-joint robots require the lead screw and spline shaft protective cover structure to determine the stroke of the lead screw and spline shaft in advance. The lead screw and spline shaft cannot be replaced with a longer stroke at any time. Even if a telescopic protective cover is used alone, the soft material of the protective cover cannot prevent the lead screw and spline shaft from being bumped. In addition, the compression of this type of protective cover requires a portion of the lead screw and spline shaft stroke, resulting in a shorter actual stroke.

[0031] In view of this, such as Figs. 1 to 3 As shown, a lead screw spline shaft protective cover structure for a horizontal multi-joint robot includes a second link portion 300. The second link portion 300 includes a second link housing 301, and a lead screw spline shaft 302 is inserted through the front end of the second link housing 301. A lead screw spline shaft protective cover 310 for protecting the lead screw spline shaft 302 is sleeved on the outer surface of the lead screw spline shaft 302. Specifically, the lead screw spline shaft protective cover 310 is located in the upper middle section of the outer surface of the lead screw spline shaft 302.

[0032] Furthermore, the lead screw spline shaft protective cover 310 is provided with an upper lead screw cover 305, a middle lead screw cover 304, and a lower lead screw cover 303 from top to bottom. Specifically, the lower end of the middle lead screw cover 304 is connected to the upper end of the lower lead screw cover 303, and the upper end of the middle lead screw cover 304 is connected to the lower end of the upper lead screw cover 305. In this specific embodiment, the middle lead screw cover 304 can be fixedly connected to the upper lead screw cover 305 and the lower lead screw cover 303 respectively by adhesive. In other specific embodiments, it can also be fixedly connected by threads or other means.

[0033] Specifically, both the upper part 305 and the lower part 303 of the lead screw cover are integrally molded using injection molding. When changing the length and stroke of the lead screw spline shaft 302, it is not necessary to replace the upper part 305 and the lower part 303 of the lead screw cover, thus saving the cost of this invention. Meanwhile, at least one middle part 304 of the lead screw cover is provided, and the middle part 304 is a column with a uniform cross-section. In this specific embodiment, there is one middle part 304 of the lead screw cover, but multiple middle parts 304 can be provided according to actual needs. The middle part 304 of the lead screw cover can be changed arbitrarily according to the length and stroke requirements of the lead screw spline shaft 302.

[0034] Furthermore, a lead screw nut mounting seat 307 is fixedly provided on the upper surface of the second connecting rod housing 302. At least one first screw 308 is provided at each of the four corners of the lead screw nut mounting seat 307. The first screws 308 are used to fix the lead screw nut mounting seat 307 to the second connecting rod housing 302. Of course, other fixing methods can also be used according to actual needs.

[0035] Furthermore, a lead screw nut 309 is fitted inside the lead screw nut mounting base 307, and the lead screw nut 309 is used to fit the lead screw spline shaft 302 onto the inner wall of the lead screw nut 309.

[0036] In this specific embodiment, by setting the lead screw nut mounting seat 307 and the lead screw nut 309, the lead screw spline shaft 302 can be better protected, preventing the lead screw spline shaft 302 from shaking during operation, and further ensuring the stability of the lead screw spline shaft 302 during operation.

[0037] Specifically, the upper end of the lower part of the lead screw cover 303 has a smaller hole diameter than the lower end. The bottom end of the lower part of the lead screw cover 303 is used to fit the lead screw nut mounting seat 307 into the lower part of the lead screw cover 303. The lower part of the lead screw cover 303 is fixed to the upper surface of the second connecting rod housing 301 by the second screw 306, which can better protect the stability of the lead screw spline shaft 302 during operation.

[0038] The working principle of this utility model is as follows: By dividing the lead screw spline shaft protective cover 310 into three parts: upper part 305, middle part 304, and lower part 303, if a lead screw spline shaft 302 with different strokes needs to be replaced, only the middle part 304 of the middle part needs to be replaced with a different size, and the height of the entire protective cover assembly can be adjusted. In this way, only the middle part 304 needs to be replaced, without replacing the lower part 303 and the upper part 305. Moreover, the length of the middle part 304 can be adjusted arbitrarily according to the requirements. When dealing with lead screw spline shafts 302 with different strokes, it has a huge cost advantage compared to the injection-molded one-piece lead screw spline shaft protective cover 310, and the stroke of the lead screw spline shaft 302 can be flexibly changed.

[0039] In addition, the lead screw spline shaft protective cover 310 is divided into three parts, which can be freely extended and retracted. This not only better protects the lead screw spline shaft 302, but also does not occupy part of the stroke of the lead screw spline 302, so as not to cause the actual stroke of the lead screw spline shaft 302 to become shorter.

[0040] In the foregoing description of this specification, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this specification, those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Based on the above description in this specification, those skilled in the art will also understand that terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not imply that the devices or elements involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0042] Furthermore, the terms "first" or "second," etc., used in this specification to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as indicating, explicitly or implicitly, relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0043] While various embodiments of the invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and essence of the invention. It should be understood that various alternatives to the embodiments of the invention described herein may be employed in the practice of the invention. The appended claims are intended to define the scope of protection of the invention and therefore cover modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A protective cover structure for the lead screw spline shaft of a horizontal multi-joint robot, comprising a second connecting rod portion, characterized in that, The second connecting rod portion includes a second connecting rod housing, with a lead screw spline shaft passing through the front end of the second connecting rod housing, and a lead screw spline shaft protective cover for protecting the lead screw spline shaft is provided on the outer sleeve of the lead screw spline shaft.

2. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 1, characterized in that, A lead screw nut mounting seat is fixed on the upper surface of the second connecting rod housing. At least one first screw is provided at each of the four corners of the lead screw nut mounting seat. The first screw is used to fix the lead screw nut mounting seat to the second connecting rod housing.

3. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 2, characterized in that, The lead screw nut is fitted inside the lead screw nut mounting seat, and the lead screw nut is used to fit the lead screw spline shaft into its inner wall.

4. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 2, characterized in that, The lead screw spline shaft protective cover consists of an upper part, a middle part, and a lower part, arranged from top to bottom.

5. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 4, characterized in that, The upper end of the lower part of the lead screw cover has a smaller hole diameter than the lower end. The bottom end of the lower part of the lead screw cover is used to fit the lead screw nut mounting seat inside the lower part of the lead screw cover. The lower part of the lead screw cover is fixed to the upper surface of the second connecting rod housing by a second screw.

6. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 4, characterized in that, The lower end of the middle component of the lead screw cover is connected to the upper end of the lower component of the lead screw cover, and the upper end of the middle component of the lead screw cover is connected to the lower end of the upper component of the lead screw cover.

7. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 4, characterized in that, The lead screw cover has at least one component, and the lead screw cover is a column with a constant cross-section.

8. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 4, characterized in that, Both the upper and lower parts of the lead screw cover are injection molded and integrally formed.

9. The lead screw spline shaft protective cover structure for a horizontal multi-joint robot according to claim 1, characterized in that, The protective cover for the lead screw spline shaft is located in the upper middle section of the outer surface of the lead screw spline shaft.

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