TWI719732B - Joints that can be used to protect the tube - Google Patents

Abstract

A joint for movable steering of a protective tube includes a body unit and a limit unit. The body unit is hollow and used for inserting a protective tube along an axis. The body unit includes a first inner end surface, a second inner end surface opposite to the first inner end surface along the axis, and a The inner peripheral surface between the first inner end surface and the second inner end surface, the first inner end surface, the second inner end surface, and the inner peripheral surface jointly define an arrangement space. The limiting unit is used to connect the protection tube and is limited in the installation space. The limiting unit includes a first outer end surface adjacent to the first inner end surface, and a second outer end surface adjacent to the second inner end surface. The end surface, and an outer peripheral surface adjacent to the inner peripheral surface, the distance between the first outer end surface and the second outer end surface is smaller than the distance between the first inner end surface and the second inner end surface, and the diameter of the outer peripheral surface is smaller than the inner The diameter of the peripheral surface is such that the limiting unit can rotate about the axis relative to the main body unit, and can allow the connection between the protective tube and the joint to be flexibly rotated.

Description

Joints that can be used for the movable steering of the protective tube

The present invention relates to a joint, in particular to a joint that can be used for the movable steering of a protective tube.

There is a kind of quick waterproof joint for wave tube disclosed in Taiwan Certificate No. M296536 Patent, which includes a hollow joint body, a waterproof fixing part group, and a pressing part. The joint body includes a second joint portion with an external thread, and a protruding edge protruding from the inner middle section. The waterproof fixing assembly includes a soft waterproof seat and a ring buckle. The soft waterproof seat is hollow and has a second joint part inserted into the connector body and a lip that abuts against the convex edge, and a reverse A recessed portion on the lip edge and abutting against the end surface of the second joint portion, the ring buckle is inserted into the recessed portion of the soft waterproof seat, and has a plurality of elastic buckles arranged on the inner ring, and a plurality of A card edge arranged on the free end of the elastic clasp. The tightening member has a socket for a wave tube to penetrate, an internal thread section locked to the second joint of the joint body, and a pusher located on the inner edge of the socket and against the ring buckle. Noodles.

When in use, one end of the wave tube is inserted into the socket of the tightening part, inserted into the waterproof fixing part group, and snapped with the edge of the ring buckle to be fixed to the The wave tube quick waterproof joint, in this way, the wave tube can be connected to a fixed object through the wave tube quick waterproof joint.

However, the wave tube is mainly used for the wire of the machine to pass through to protect the wire, and the wire will move with the action of the machine. At this time, because the end of the wave tube is firmly pressed against the The wave tube quick waterproof connector makes the wire and the wave tube restricted, and cannot rotate freely at random. In particular, nowadays three-axis or more robotic arms are very common, and four-axis and five-axis robotic arms are widely used. In the manufacturing industry, the robot arm emphasizes the flexibility and accuracy of movement, but the wire of the robot arm is limited by the wave tube quick waterproof connector, which will cause the robot arm to be pulled during operation, which will affect its movement. Accuracy.

In addition, if the wave tube receives a large rotating force and rotates relative to the ring buckle, the wave tube will also be cut by the clamping edges of the ring buckle, causing the wave tube to fall off from the joint. The internal wires are exposed, even when the corrugated tube is cut, the internal wires are also cut.

Therefore, the object of the present invention is to provide a joint that can be used for the movable steering of the protective tube.

Therefore, the joint for the movable steering of the protective tube of the present invention includes a body unit and a limit unit. The body unit is hollow and used for inserting a protective tube along an axis. The body unit includes a first inner end surface, a second inner end surface opposite to the first inner end surface along the axis, and a The inner peripheral surface between the first inner end surface and the second inner end surface, the first inner end surface, the second inner end surface, and the inner peripheral surface jointly define an installation space for inserting the protective tube. The limiting unit is used to connect the protection tube and is limited in the installation space. The limiting unit includes a first outer end surface adjacent to the first inner end surface, a first outer end surface opposite to the first outer end surface along the axis, and A second outer end surface adjacent to the second inner end surface, and an outer peripheral surface extending between the first outer end surface and the second outer end surface and adjacent to the inner peripheral surface, the first outer end surface and the second outer end surface The distance between the outer end surfaces is smaller than the distance between the first inner end surface and the second inner end surface, and the diameter of the outer circumferential surface is smaller than the diameter of the inner circumferential surface, so that the limiting unit can rotate about the axis relative to the main body unit.

The effect of the present invention is that the distance between the first outer end surface and the second outer end surface of the limiting unit is smaller than the distance between the first inner end surface and the second inner end surface of the body unit, and the limiting unit The diameter of the outer peripheral surface is smaller than the diameter of the inner peripheral surface of the body unit, so that the limit unit can rotate with the protection tube in the setting space around the axis, so that the connection between the protection tube and the joint can be flexible Rotation.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.

1 and FIG. 2, a first embodiment of the joint for movable steering of the protective tube of the present invention is suitable for connecting a protective tube 9. In this embodiment, an outer surface 91 of the protective tube 9 forms a plurality of shapes Annular recesses 911 spaced apart from each other. The joint for the movable turning of the protective tube includes a body unit 1 and a limit unit 2.

The body unit 1 is hollow and used for inserting the protective tube 9 along an axis L. The body unit 1 includes a first inner end surface 11, a second inner end surface 12 opposite to the first inner end surface 11 along the axis L, and a second inner end surface 12 extending between the first inner end surface 11 and the second inner end surface 12 The inner peripheral surface 13, the first inner end surface 11, the second inner end surface 12 and the inner peripheral surface 13 jointly define an installation space 14 for the protection tube 9 to be inserted into.

In this embodiment, the body unit 1 further includes a joint body 15 and a sleeve 16 set and screw-locked to one end 150 of the joint body 15, and the joint body 15 and the sleeve 16 jointly define the installation space 14. The end 150 of the joint body 15 is tubular and has an end surface 151, and the end surface 151 constitutes the first inner end surface 11. The sleeve 16 is used for the protection tube 9 to pass through and has an inner end surface 161 opposite to the joint body 15, and an inner ring surface 162 connected to the inner end surface 161 and locked to the joint body 15. The inner end surface 161 constitutes the second inner end surface 12, and the inner ring surface 162 constitutes the inner peripheral surface 13.

The limiting unit 2 is used to connect the protection tube 9 and is limited in the setting space 14. The limiting unit 2 includes a first outer end surface 21 adjacent to the first inner end surface 11, and an opposite direction along the axis L A second outer end surface 22 on the first outer end surface 21 adjacent to the second inner end surface 12, and a second outer end surface 22 extending between the first outer end surface 21 and the second outer end surface 22 and adjacent to the inner peripheral surface 13的外面23。 The outer peripheral surface 23. The first outer end surface 21 and the second outer end surface 22 are respectively restricted by the inner end surface 11 and the second inner end surface 12 of the body unit 1 in the direction in which the axis L extends, so that the limit The unit 2 is limited to the installation space 14. The first external face 21 and the outer end surface of the second pitch is less than 2 l 22 of the first inner surface 11 and the second inner end surface 12 of the distance l 1, and the outer peripheral surface diameter d2 23 is smaller than the inner circumferential surface 13 The diameter d1 is such that the limiting unit 2 can rotate about the axis L relative to the body unit 1.

In this embodiment, the limiting unit 2 further includes a limiting member 24 that is C-shaped around the axis L. As shown in FIG. The limiting member 24 has an outer ring portion 241 for sleeved on the protective tube 9, and at least one blocking portion 242 connected to the outer ring portion 241 and protruding inwardly toward the axis L. The outer ring portion 241 has two opposite end surfaces 243 along the axis L, an outer ring surface 244 connecting the end surfaces 243, and an inner ring surface 245 opposite to the outer ring surface 244. The end surfaces 243 are adjacent to each other. The first inner end surface 11 and the second inner end surface 12, the end surface 243 adjacent to the first inner end surface 11 constitutes the first outer end surface 21, and the other end surface 243 constitutes the second outer end surface 22. The ring surface 244 constitutes the outer peripheral surface 23. In this embodiment, the limiting member 24 has a plurality of blocking portions 242 arranged at intervals around the axis L. Each blocking portion 242 is connected to the inner ring surface 245 and is in the shape of elastic claws. The blocking portion 242 is used to block one of the recessed portions 911 positioned in the protection tube 9, and only allows the protection tube 911 to pass from the second inner end surface 12 toward the first inner end surface 11.

In this embodiment, the joint body 15, the sleeve 16, the limiting member 24, and the protective tube 9 can be made of plastic materials, and the materials of these components are not limited thereto.

When assembling, the limiting member 24 can be placed in the sleeve 16, then the sleeve 16 and the end 150 of the joint body 15 can be locked, and then the protective tube 9 can be moved along the axis L by the The sleeve 16 is inserted into the setting space 14 in the direction of the joint body 15. During the insertion, the limiting member 24 can be pushed and deformed to allow the protective tube 9 to pass through until the protective tube 9 is inserted into a sufficient length. The blocking portions 242 of the positioning member 24 and one of the recessed portions 911 of the protection tube 9 are blocked and positioned, and the protection tube 9 cannot be drawn out along the axis L in a direction away from the joint body 15 to complete the assembly. However, the assembly method of this embodiment is not limited to this.

In use, since the distance l2 between the first outer end surface 21 and the second outer end surface 22 of the limiting unit 2 is smaller than the distance l1 between the first inner end surface 11 and the second inner end surface 12 of the body unit 11, And the diameter d2 of the outer circumferential surface 23 of the limiting unit 2 is smaller than the diameter d1 of the inner circumferential surface 13 of the body unit 1 (at this time, the joint body 15 and the sleeve 16 are locked to each other), so when the protection tube 9 When being rotated around the axis L by an external force, the limiting unit 2 can rotate with the protection tube 9 in the setting space 14 around the axis L, so as to allow the protection tube 9 to be connected with the joint capable of turning the protection tube. It can be flexibly rotated. In this way, when this embodiment is used for the wires of a general machine to pass through, the wires can be allowed to rotate freely with the movement of the machine, especially for robots with more than three axes When the wires are threaded, the wires can be rotated smoothly to prevent the wires from jamming and pulling, which will affect the accuracy of the robot arm.

In addition, since the limiting member 24 can freely rotate in the setting space 14, it can prevent the limiting member 24 from being locked in the setting space 14 and rotating relative to the protective tube 9, resulting in the limiting member 24 The blocking parts 242 of the protection tube 9 are cut and damaged.

Referring to Figures 3 and 4, the second embodiment of a joint for movable steering of the protective tube of the present invention is similar to the first embodiment, and the difference lies in:

The number of the blocking portion 242 of the limiting member 24 of the limiting unit 2 is one, and the blocking portion 242 extends around the axis L, and the inner ring surface 245 of the outer ring portion 241 faces the axis L Extending radially, the blocking portion 242 is used for blocking one of the recessed portions 911 positioned in the protection tube 9.

In this embodiment, because the limiting member 24 has a relatively simple structure, the thickness of the outer ring portion 241 can be increased, and the structural strength of the limiting member 24 can be improved, so that it is not easy to deform, and can be firmly clamped. The protection tube 9 therefore makes this embodiment suitable for connecting the protection tube 9 with a larger size.

In this embodiment, when assembling, the sleeve 16 is first set on the protective tube 9, then the limiting member 24 is opened and sleeved and clamped to the end of the protective tube 9, and finally the joint body 15 is connected to the end of the protective tube 9 The set 16 can be locked.

Since this embodiment has a structure similar to that of the first embodiment, it can also achieve the same purpose and effect as the first embodiment.

Referring to Fig. 5 and Fig. 6, the third embodiment of a joint for movable steering of the protective tube of the present invention is similar to the first embodiment, and the difference lies in:

An inner surface 92 of the protective tube 9 applicable to the joint for the movable turning of the protective tube forms a spiral recess 921. The inner peripheral surface 13 of the main body unit 1 of the joint for the movable steering of the protective tube has a first inner diameter section 131 and a second inner diameter section 132 with a diameter different from the first inner diameter section 131. The outer peripheral surface 23 of the limiting unit 2 has a first outer diameter section 231 with a position and diameter corresponding to the first inner diameter section 131, and a second outer diameter section with a position and diameter corresponding to the second inner diameter section 132 232. The diameter d2' of the first outer diameter section 231 is smaller than the diameter d1' of the first inner diameter section 131, and the diameter d2" of the second outer diameter section 232 is smaller than the diameter d1" of the second inner diameter section 132.

The end 150 of the joint body 15 of the body unit 1 further has an inner tube surface 152 connected to the inner edge of the end surface 151, and an outer edge connected to the inner tube surface 152 and a shoulder surface 153 away from the end surface 151, The inner tube surface 152 constitutes the first inner diameter section 131, the shoulder surface 153 constitutes the first inner end surface 11, and the part of the inner ring surface 162 of the sleeve 16 that is not connected to the joint body 15 constitutes the second inner diameter section 132.

The limiting unit 2 includes the first outer end surface 21, the second outer end surface 22, and the outer peripheral surface 23. In addition, it also includes an end adjacent to the first inner end surface 11 and used to be fixed to the protective tube 9 The positioning member 25 of the upper part, and a backing ring 26 located between the positioning member 25 and the second inner end surface 12 and used to sleeve the protective tube 9. The positioning member 25 has an outer cover portion 251 located between the first inner end surface 11 and the backing ring 26 and used to cover the end of the protective tube 9, and a lock connected to the inner edge of the outer cover portion 251接部252. The outer cover portion 251 has an end surface 253 adjacent to the first inner end surface 11, and an outer ring surface 254 connected to the outer edge of the end surface 253 and extending toward the backing ring 26. The end surface 253 constitutes the first outer end surface 21 , The outer ring surface 254 constitutes the first outer diameter section 231. The locking portion 252 is used to insert the end of the protection tube 9 and screw-lock to the inner surface 92 of the protection tube 9. The backing ring 26 has two abutment surfaces 261 opposite along the axis L, and an outer ring surface 262 connecting the outer edges of the abutment surfaces 261. The abutment surfaces 261 are adjacent to the positioning member 25 and the positioning member 25 and the The second inner end surface 12, the abutting surface 261 adjacent to the second inner end surface 12 constitutes the second outer end surface 22, and the outer ring surface 262 constitutes the second outer diameter section 232.

In this embodiment, the positioning member 25 can be made of a metal material, the backing ring 26 is made of a rubber material, and the protective tube 9 is made of a metal material and covered with a rubber layer. Not limited to this.

When assembling this embodiment, the sleeve 16 can be set on the protective tube 9 first, then the backing ring 26 can be set on the end of the protective tube 9, and then the locking portion of the positioning member 25 252 is inserted into the end of the protective tube 9 and screw-locked to the inner surface 92 of the protective tube 9. At this time, the backing ring 26 is located between the positioning member 25 and the sleeve 16, and finally the joint body 15 and The set 16 can be locked.

In use, the first end surface of the outer end face 21 and the second outer pitch l 22 2 is smaller than the inner end surface 11 of the first end surface and the second inner spacing of 1 l 12 (the positioning member 25 and the cushion ring 26 Leaning against), and the diameter d2' of the first outer diameter section 231 is smaller than the diameter d1' of the first inner diameter section 131, and the diameter d2" of the second outer diameter section 232 is smaller than that of the second inner diameter section 132 The diameter d1", therefore, the limiting unit 2 can rotate with the protective tube 9 in the installation space 14, so it can achieve the same purpose and effect as the first embodiment.

In summary, the joint of the present invention that can be used for the movable steering of the protective tube, the distance l 2 between the first outer end surface 21 and the second outer end surface 22 of the limiting unit 2 is smaller than that of the first outer end surface of the main body unit 1. The distance between the inner end surface 11 and the second inner end surface 12 is l 1, and the diameter d2 of the outer peripheral surface 23 of the limiting unit 2 is smaller than the diameter d1 of the inner peripheral surface 13 of the main body unit 1, so that the limiting unit 2 The protective tube 9 can be rotated around the axis L in the installation space 14 to allow the protective tube 9 to be flexibly rotated at the joint connection for the protective tube to move, thereby ensuring the movement of the internal wires and the machine It is smooth and can prevent the protection tube 9 and the limiting unit 2 from being damaged due to relative rotation, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to This invention patent covers the scope.

1: body unit 11: first inner end surface 12: second inner end surface 13: inner peripheral surface 131: first inner diameter section 132: second inner diameter section 14: installation space 15: joint body 150: end 151: end surface 152: inner tube surface 153: shoulder surface 16: kit 161: inner end surface 162: inner ring surface 2: limit unit 21: first outer end surface 22: second outer end surface 23: outer peripheral surface 231: first outer diameter section 232 : Second outer diameter section 24: limiting member 241: outer ring portion 242: blocking portion 243: end surface 244: outer ring surface 245: inner ring surface 25: positioning member 251: outer cover portion 252: locking portion 253: end surface 254: outer ring surface 26: backing ring 261: abutment surface 262: outer ring surface 9: protective tube 91: outer surface 911: recessed portion 92: inner surface 921: recessed portion L: axis l 1: spacing l 2: spacing d1: Diameter d1': Diameter d1": Diameter d2: Diameter d2': Diameter d2": Diameter

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Fig. 1 is a perspective exploded view of a first embodiment of a joint capable of turning a protective tube in accordance with the present invention; Figure 2 is a cross-sectional view of the first embodiment; Fig. 3 is a perspective exploded view of a second embodiment of the joint for movable steering of the protective tube according to the present invention; Figure 4 is a cross-sectional view of the second embodiment; Fig. 5 is a perspective exploded view of a third embodiment of the joint for movable steering of the protective tube according to the present invention; and Fig. 6 is a cross-sectional view of the third embodiment.

1: body unit

11: The first inner end face

12: The second inner end face

13: inner peripheral surface

14: Set up space

15: Connector body

150: end

16: kit

23: Outer peripheral surface

24: limit piece

241: Outer Ring

242: Jamming Department

243: end face

9: Protection tube

L: axis

l 1: spacing

2: limit unit

21: The first outer end face

22: The second outer end face

l 2: Spacing

d1: diameter

d2: diameter

Claims (6)

A joint capable of movably turning a protective tube includes: a body unit, which is hollow and used for inserting a protective tube along an axis, the body unit includes a first inner end surface, and a first inner end surface along the axis opposite to the first The second inner end surface of the inner end surface, and an inner peripheral surface extending between the first inner end surface and the second inner end surface, the first inner end surface, the second inner end surface and the inner peripheral surface jointly define a For the installation space for the protection tube to be inserted, the body unit further includes a joint body and a sleeve fixed to one end of the joint body. The end of the joint body has an end surface, and the end surface constitutes the The first inner end surface, the kit is used for the protection tube to pass through and has an inner end surface opposite to the joint body, and an inner ring surface connected to the inner end surface and connected to the joint body, and the inner end surface constitutes the second The inner end surface, the inner ring surface constitutes the inner peripheral surface; and a limiting unit for connecting the protection tube and being limited in the setting space, the limiting unit includes a first adjacent to the first inner end surface Outer end surface, a second outer end surface opposite to the first outer end surface along the axis and adjacent to the second inner end surface, and a second outer end surface extending between the first outer end surface and the second outer end surface and adjacent to the inner end surface The outer peripheral surface of the peripheral surface, the distance between the first outer end surface and the second outer end surface is smaller than the distance between the first inner end surface and the second inner end surface, and the diameter of the outer peripheral surface is smaller than the diameter of the inner peripheral surface, so that The limiting unit can rotate around the axis relative to the main body unit. According to claim 1 of the joint capable of movably turning the protective tube, an outer surface of the protective tube forms a plurality of annular recesses spaced apart from each other, wherein the limiting unit further includes a C-shape around the axis The limit piece, the limit The positioning member has an outer ring portion for sleeved on the protection tube, and at least one blocking portion connected to the outer ring portion and protruding inwardly toward the axis, the outer ring portion having two opposite end surfaces along the axis , An outer ring surface connecting the end surfaces, and an inner ring surface opposite to the outer ring surface, the end surfaces of the limiting member are respectively adjacent to the first inner end surface and the second inner end surface, and respectively constitute The first outer end surface and the second outer end surface, the outer ring surface of the limiting member constitutes the outer peripheral surface, and the blocking portion is used for blocking one of the recessed portions positioned on the protection tube. The joint capable of movable steering of the protective tube according to claim 2, wherein the limiting member of the limiting unit has a plurality of blocking parts arranged at intervals around the axis, and each blocking part is connected to the outer ring part The inner ring surface is in the shape of elastic claws, and the blocking parts are used to block one of the recesses positioned in the protection tube, and only for the protection tube from the second inner end to the first The direction of an inner end face passes through. The joint capable of movably turning the protective tube according to claim 2, wherein the number of the blocking part of the limiting member of the limiting unit is one, and the blocking part extends around the axis and is formed by the outer The inner ring surface of the ring portion extends radially toward the axis, and the blocking portion is used for blocking one of the recessed portions positioned on the protection tube. The joint capable of movably turning a protective tube according to claim 1, wherein the inner peripheral face of the body unit has a first inner diameter section and a second inner diameter section, and the outer peripheral surface of the limit unit Having a first outer diameter section corresponding to the first inner diameter section, and a second outer diameter section corresponding to the second inner diameter section, the diameter of the first outer diameter section is smaller than the diameter of the first inner diameter section, The diameter of the second outer diameter section is smaller than the diameter of the second inner diameter section. The joint capable of turning the protective tube movable as described in claim 5, wherein the The end portion of the joint body of the body unit is tubular, and the end portion also has an inner tube surface connected to the inner edge of the end surface of the body unit, and an outer edge connected to the inner tube surface and a shoulder surface away from the end surface, The inner tube surface constitutes the first inner diameter section, the shoulder surface constitutes the first inner end surface, the part of the inner ring surface of the sleeve that is not connected to the joint body constitutes the second inner diameter section, and the limiting unit further includes A positioning member adjacent to the first inner end surface and used to be fixed to the end of the protective tube, and a backing ring located between the positioning member and the second inner end surface and used to sleeve the protective tube, The positioning member has an outer cover part located between the first inner end surface and the backing ring and used to sleeve the end of the protective tube, and a cover part connected to the inner edge of the outer cover part and used to insert the protective tube A locking portion, the outer cover portion has an end surface adjacent to the first inner end surface, and an outer ring surface connected to the outer edge of the end surface of the outer cover portion and extending toward the backing ring, and the end surface of the positioning member constitutes the The first outer end surface, the outer ring surface of the positioning member constitutes the first outer diameter section, the backing ring has two abutting surfaces opposite along the axis, and an outer ring surface connecting the outer edges of the abutting surfaces , The abutting surfaces are respectively adjacent to the positioning member and the second inner end surface, the abutting surface adjacent to the second inner end surface constitutes the second outer end surface, and the outer ring surface of the backing ring constitutes the second outer end surface. Diameter section.

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