A cavity sealed fixed threading pipe structure

Abstract

The utility model relates to a cavity sealed fixed threading tube structure, comprising a cavity machine base and a threading tube that penetrates and is installed in the cavity machine base, so that the threading tube forms a hollow threading area on the cavity machine base; a small diameter end face and a lower sealing groove are provided in the lower cavity of the cavity machine base, the diameter of the insertion end of the threading tube matches the size of the small diameter end face, and a lower sealing ring is installed in the lower sealing groove to seal the insertion end tube wall of the threading tube; a large diameter end face and a clamping groove are provided in the upper cavity of the cavity machine base, the diameter of the fixed end of the threading tube matches the size of the large diameter end face, and a C ring groove with a roughly C-shaped cross section is opened on the outer side of the fixed end tube wall of the threading tube, and an upper sealing groove is formed by the C ring groove and the clamping groove, and an upper sealing ring is installed to seal and fix the fixed end tube wall of the threading tube. It has the advantages of simple structure, easy processing and assembly.

Description

Technical Field

[0001] The utility model relates to the field of industrial manufacturing and automation, and in particular to a cavity sealed fixed wire threading pipe structure. Background Art

[0002] At present, the market for reducers for general robots is rapidly heating up. With the changes in robot structure and usage scenarios, new requirements are also put forward for the reducer structure. Among them, reducers with hollow wiring structure are particularly popular.

[0003] There are generally two existing hollow reducer cavity wiring solutions. One is to directly pass the cable through the hollow center hole of the reducer without sealing it. Dust can easily enter the reducer cavity and damage the reducer. The other is to start with external assembly castings, use multiple parts to seal the pipe fittings or process the pipe fittings into a sealing structure. Its structure is complex and difficult to process and assemble. Summary of the invention

[0004] The purpose of the utility model is to provide a cavity-sealed fixed wire threading tube structure which is simple in structure and easy to process and assemble in view of the above-mentioned existing problems.

[0005] The purpose of the utility model is achieved in this way. A cavity sealed fixed threading tube structure comprises a cavity machine base and a threading tube that penetrates and is installed in the cavity machine base, so that the threading tube forms a hollow threading area on the cavity machine base; a small-diameter end face and a lower sealing groove are provided in the lower cavity of the cavity machine base, the diameter of the insertion end of the threading tube matches the size of the small-diameter end face, and a lower sealing ring is installed in the lower sealing groove to seal the insertion end tube wall of the threading tube; a large-diameter end face and a clamping groove are provided in the upper cavity of the cavity machine base, the diameter of the fixed end of the threading tube matches the size of the large-diameter end face, and a C-ring groove with a roughly C-shaped cross-section is opened on the outer side of the tube wall of the fixed end of the threading tube, the C-ring groove and the clamping groove form an upper sealing groove and an upper sealing ring is installed to seal and fix the fixed end tube wall of the threading tube.

[0006] In the utility model, a top shoulder is arranged on the lower cavity of the cavity machine base, and the top shoulder is used to limit the axial downward movement of the threading tube so as to limit the position of the threading tube.

[0007] The utility model reserves an annular groove between the upper cavity and the fixed end tube wall of the threading tube. The upper sealing ring in the upper sealing groove is squeezed and deformed to protrude into the annular groove, so that the upper sealing ring is axially limited to form a structure to prevent the threading tube from moving up and down.

[0008] In the utility model, the corner of the upper cavity ring surface corresponding to the annular groove is provided with a rounded corner or / and a chamfered right angle, so that the upper sealing ring is easily squeezed and compressed to be installed in the upper sealing groove.

[0009] In the utility model, the upper sealing ring and the lower sealing ring are O-type rubber sealing rings.

[0010] The utility model has a structure in which the width of the upper sealing groove is less than 1.2 times the standard cross-sectional diameter of the upper sealing ring, and the width of the annular groove is greater than the minimum compressed cross-sectional diameter formed after the upper sealing ring is compressed to the maximum, so that the upper sealing ring can be easily installed from the annular groove into the upper sealing groove from top to bottom.

[0011] The utility model uses the upper and lower cavity walls of the cavity machine base to set sealing grooves, the threading tube is processed with matching large and small tube diameters, the cavity is closed by a sealing ring, and the upper sealing ring is used as a retaining ring to fix the wiring tube, thereby reducing parts assembly; further, a top shoulder is added to the lower cavity scheme of the cavity machine base to limit the axial downward movement of the threading tube; further, an annular groove is reserved between the upper cavity and the tube wall of the fixed end of the threading tube, and the upper sealing ring in the upper sealing groove is squeezed and deformed to protrude into the annular groove, so that the upper sealing ring is axially limited to prevent the threading tube from moving up and down. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the A part of the embodiment;

[0014] Figure 3 yes Figure 2 A schematic structural diagram of an example in which an upper sealing ring is squeezed and deformed to serve as a retaining ring to fix a wiring tube.

[0015] In the figure, 1, threading tube; 2, lower cavity; 3, small diameter end face; 4, lower sealing groove; 5, lower sealing ring; 6, upper cavity; 7, large diameter end face; 8, slot; 9, C ring groove; 10, upper sealing groove; 11, upper sealing ring; 12, top shoulder; 13, annular groove; 14, chamfered corner; 15, chamfered right angle; W, width of upper sealing groove; CS, standard cross-sectional diameter; W1, width of annular groove; T, compressed cross-sectional diameter. DETAILED DESCRIPTION

[0016] Reference Figures 1 to 3The present embodiment is a cavity sealed fixed threading tube structure, comprising a cavity machine base and a threading tube 1 that penetrates and is installed in the cavity machine base, so that the threading tube forms a hollow threading area on the cavity machine base; a small-diameter end face 3 and a lower sealing groove 4 are provided on the lower cavity 2 of the cavity machine base, and the diameter of the insertion end of the threading tube matches the size of the small-diameter end face, and a lower sealing ring 5 is installed in the lower sealing groove to seal the tube wall of the insertion end of the threading tube; a large-diameter end face 7 and a card slot 8 are provided on the upper cavity 6 of the cavity machine base, and the diameter of the fixed end of the threading tube matches the size of the large-diameter end face, and the fixed end of the threading tube A C-ring groove 9 with a roughly C-shaped cross-section is provided on the outer side of the fixed-end tube wall. The C-ring groove and the clamping groove form an upper sealing groove 10, and an upper sealing ring 11 is installed to seal and fix the fixed-end tube wall of the threading tube; the lower cavity of the cavity machine base is provided with a top shoulder 12, which limits the axial downward movement of the threading tube and limits the position of the threading tube; an annular groove 13 is reserved between the upper cavity and the fixed-end tube wall of the threading tube, and the upper sealing ring in the upper sealing groove is squeezed and deformed to protrude into the annular groove, so that the upper sealing ring is axially limited to form a structure to prevent the threading tube from moving up and down.

[0017] In the utility model, a larger gap is formed by expanding the hole in the upper section of the upper cavity sealing ring groove, that is, a rounded corner 14 and a chamfered right angle 15 are provided at the upper cavity annular surface corner corresponding to the annular groove, so that the upper sealing ring is squeezed and compressed to fit into the upper sealing groove.

[0018] In the utility model, the upper sealing ring and the lower sealing ring are O-type rubber sealing rings.

[0019] In the utility model, the width W of the upper sealing groove is less than 1.2 times the standard cross-sectional diameter CS of the upper sealing ring, and the width W1 of the annular groove is greater than the minimum compressed cross-sectional diameter T formed after the upper sealing ring is compressed to the maximum, so that the upper sealing ring is easily installed from the annular groove to the upper sealing groove from top to bottom.

[0020] The utility model is provided with rounded corners or chamfered corners so as to compress the sealing ring and place it therein.

[0021] The above describes the specific embodiments of the utility model, but does not limit the scope of the utility model patent. The devices and structures that are not described in detail should be understood to be implemented in a common manner in the art. Those skilled in the art can make various deformations or modifications within the scope of the claims, which should all be included in the scope of protection of the utility model patent.

Claims

1. A cavity sealed fixed threading tube structure, characterized in that: It comprises a cavity machine base and a threading tube (1) which penetrates and is inserted into the cavity machine base, so that the threading tube forms a hollow threading area on the cavity machine base; A small-diameter end face (3) and a lower sealing groove (4) are provided in the lower cavity (2) of the cavity machine base. The diameter of the insertion end of the threading tube matches the size of the small-diameter end face. A lower sealing ring (5) is installed in the lower sealing groove to seal the tube wall of the insertion end of the threading tube. A large diameter end face (7) and a clamping groove (8) are provided on the upper cavity (6) of the cavity machine base. The diameter of the fixed end of the threading tube matches the large diameter end face. A C-ring groove (9) having a substantially C-shaped cross section is provided on the outer side of the tube wall of the fixed end of the threading tube. The C-ring groove and the clamping groove form an upper sealing groove (10) and an upper sealing ring (11) is installed to seal and fix the tube wall of the fixed end of the threading tube.

2. The cavity sealed fixed wire threading tube structure according to claim 1, characterized in that: The lower cavity of the cavity machine base is provided with a top shoulder (12), which limits the axial downward movement of the threading tube and limits the position of the threading tube.

3. The cavity sealed fixed wire threading tube structure according to claim 1 or 2, characterized in that: An annular groove (13) is reserved between the upper cavity and the fixed end tube wall of the threading tube. The upper sealing ring in the upper sealing groove is squeezed and deformed to protrude into the annular groove, so that the upper sealing ring is axially limited to form a structure to prevent the threading tube from moving up and down.

4. The cavity sealed fixed wire threading tube structure according to claim 3, characterized in that: A chamfer (14) and / or a chamfer (15) are provided at the corner of the annular surface of the upper cavity corresponding to the annular groove, so that the upper sealing ring is easily squeezed and compressed to be installed in the upper sealing groove.

5. The cavity-sealed fixed wire threading tube structure according to claim 4, characterized in that: The upper sealing ring and the lower sealing ring are O-type rubber sealing rings.

6. The cavity-sealed fixed wire threading tube structure according to claim 5, characterized in that: The width (W) of the upper sealing groove is less than 1.2 times the standard cross-sectional diameter (CS) of the upper sealing ring, and the width (W1) of the annular groove is greater than the minimum compressed cross-sectional diameter (T) formed after the upper sealing ring is compressed to the maximum, thereby forming a structure in which the upper sealing ring can be easily installed from the annular groove into the upper sealing groove from top to bottom.

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