Quick clamping piece

Abstract

A shell comprises a first connecting section, a contraction section and a second connecting section, a clamping head and a positioning ring are arranged in the first connecting section, a spring piece is arranged between the clamping head and the positioning ring, the clamping head is provided with a first clamping groove, and the shell is provided with an upper clamping groove and a lower clamping groove. The clamping head can move in the first connecting section in the axial direction so as to be switched between the locking position and the opening position. The quick clamping piece further comprises a locking piece, the locking piece can be switched between a locking position and an opening position, when the locking piece is located at the locking position, the first wing portion of the locking piece penetrates through the upper clamping groove and the first clamping groove to extend out of the lower clamping groove, and when the locking piece is located at the opening position, the clamping head can pass through the arc-shaped opening of the first wing portion. When the locking piece is in the locking state, the first wing part of the locking piece penetrates through the upper clamping groove and the first clamping groove to extend out of the lower clamping groove, so that the locking state of the locking piece is more stable, and deformation of the first wing part caused by pressure of the liquid supply pipeline is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline connection technical field especially a quick clamping piece. BACKGROUND

[0002] In order to realize the intercommunication of liquid supply pipeline and hose, the quick connection structure is usually used to connect the liquid supply channel and the hose, so that the liquid in the liquid supply channel can flow into the hose smoothly.

[0003] When the liquid supply channel and the hose establish the channel and work normally, the liquid pressure exists in the pipeline, and the sealing ring and other supporting parts of the quick connection structure may be deformed after long-term work, causing the instability of the quick connection structure. INVENTION CONTENTS

[0004] The utility model provides a quick clamping piece, which can not only realize the quick connection of the pipeline, but also prevent the instability of the clamping piece caused by the liquid pressure.

[0005] A quick clamping piece comprises a shell, the shell comprises a first connecting section, a contraction section and a second connecting section, a first step is formed at the junction of the first connecting section and the contraction section, and a second step is formed at the junction of the contraction section and the second connecting section,

[0006] A clamping head and a positioning ring are arranged in the first connecting section, a spring sheet is arranged between the clamping head and the positioning ring, the spring force of the spring sheet acts on the clamping head and the positioning ring, the clamping head is provided with a first clamping groove, the shell is provided with an upper clamping groove and a lower clamping groove, the clamping head can move in the first connecting section along the axial direction to switch between a locking position and an open position, when the clamping head is located at the locking position, the first clamping groove is aligned with the upper clamping groove and the lower clamping groove in the direction perpendicular to the axis, and when the clamping head is located at the open position, the first clamping groove is staggered with at least one of the upper clamping groove and the lower clamping groove in the direction perpendicular to the axis;

[0007] The quick clamping piece further comprises a locking piece, the locking piece can switch between a locking position and an open position, when the locking piece is located at the locking position, a first wing part of the locking piece passes through the upper clamping groove and the first clamping groove and extends out of the lower clamping groove, and when the locking piece is located at the open position, the first wing part is separated from the first clamping groove.

[0008] Further, the first wing part comprises a wing foot located below, and the length of the wing foot extending out of the surface of the first connecting section is 2-5 mm at the locking position.

[0009] Further, the positioning ring comprises a first limiting ring, the clamping head is provided with a second limiting ring, and the second limiting ring is sleeved on the first limiting ring and can move along the axial direction relative to the first limiting ring.

[0010] Further, the positioning ring comprises a skirt and a first limiting part, the spring piece is arranged to press the skirt against the first step, the first limiting part extends into the contraction section, the contraction section is provided with a first sealing ring, and the first limiting part has a certain length to press the first sealing ring.

[0011] Further, the length of the first limiting part is 2-4mm.

[0012] Further, a reinforcing ring and a second sealing ring are arranged between the first limiting part and the first sealing ring, and the reinforcing ring has a higher hardness than the first and second sealing rings.

[0013] Further, the locking piece comprises a pressing part and a side part, the upper surface of the pressing part is flat, and the side part comprises a first arc surface and a second arc surface, and the first and second arc surfaces are matched with the outer periphery of the first connecting section.

[0014] Further, the locking piece further comprises a second fin part, the second fin part is arranged opposite to the first fin part, and the second fin part is matched with the outer end surface of the first connecting section.

[0015] Further, the hardness of the first and second sealing rings is 80HD-100HD.

[0016] Further, the clamping head is provided with a second limiting part, the first connecting section is provided with a limiting groove, and the second limiting part is arranged in the limiting groove and can reciprocate in the limiting groove along the axial direction.

[0017] The technical scheme has the following technical effects:

[0018] When the clamping head and the locking piece are in the open state, the clamping head blocks the movement of the locking piece under the action of the spring piece, so that the locking piece is in a stable state and can effectively prevent misoperation. When the liquid supply pipeline is inserted into the clamping head, the clamping head is pushed to move to the locked state, at this time, the locking piece can move to the locked state, so that the clamping head is maintained in the locked state and the liquid supply pipeline is fixed in the clamping head, realizing the connection of the liquid supply pipeline and the quick clamping piece, and the operation is simple and fast. When the locking piece is in the locked state, the first fin part of the locking piece passes through the upper clamping groove and the first clamping groove and extends out of the lower clamping groove, so that the locked state of the locking piece is more stable, and the deformation of the first fin part caused by the pressure of the liquid supply pipeline is prevented.

[0019] The first and second sealing rings form double sealing, and the reinforcing part is arranged between the first and second sealing rings, so that the excessive deformation of the sealing ring caused by the internal pressure is prevented to cause liquid leakage, and the utility model is particularly suitable for occasions with high internal liquid pressure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The exploded structure diagram of the embodiment one.

[0021] Figure 2 The perspective structure diagram of the embodiment one.

[0022] Figure 3 The cross-sectional structure diagram of the quick clamping piece in the open state of the embodiment one.

[0023] Figure 4 The cross-sectional structure diagram of the quick clamping piece in the locked state of the embodiment one.

[0024] The shell 1, the first connecting section 11, the contraction section 12, the second connecting section 13, the first step 51, the second step 52, the first sealing ring 2, the reinforcing member 3, the second sealing ring 4, the positioning ring 6, the skirt 61, the first limiting ring 63, the clamping head 8, the head 82, the first clamping groove 821, the second limiting ring 81, the spring piece 7, the outer end surface 822, the inner end surface 823, the second limiting part 83, the limiting groove 16, the upper clamping groove 14, the lower clamping groove 15, the locking member 9, the pressing part 91, the side part 92, the first wing part 93, the second wing part 94, the first arc surface 921, the second arc surface 922, the half wing 931, and the wing leg 932. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0026] It should be noted that, in the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more than two; the directions or position relations indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like are the directions or position relations shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the utility model.

[0027] In addition, the terms "first", "second", "third" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance.

[0028] A quick clamping piece, comprising a shell 1, the shell 1 comprising a first connecting section 11, a contraction section 12 and a second connecting section 13, the second connecting section 12 being used for connecting a hose or other pipeline, and the first connecting section 11 being used for connecting a liquid supply pipeline provided with a stopper, so as to realize the sealed connection of the liquid supply pipeline and the hose or other pipeline.

[0029] The inner diameter of the first connecting section 11 is larger than that of the contraction section 12, the inner diameter of the contraction section 12 is larger than that of the second connecting section 13, thereby forming a first step 51 at the junction of the first connecting section 11 and the contraction section 12, and a second step 52 at the junction of the contraction section 12 and the second connecting section 13. The first sealing ring 2 is arranged in the contraction section, the outer diameter of the first sealing ring is between the inner diameter of the contraction section 12 and the inner diameter of the second connecting section 13, the inner diameter of the first sealing ring matches the size of the outer diameter of the liquid supply pipe, and the first sealing ring 2 is arranged on the side close to the second step 52. When the first sealing ring 2 is subjected to external force, the sealing ring 2 can abut against the first step. The contraction section 12 is further provided with a reinforcing member 3 and a second sealing ring 4, the hardness of the reinforcing member 3 is greater than that of the first sealing ring 2 and the reinforcing member 3 is arranged outside the first sealing ring 2, and the second sealing ring 4 is arranged outside the reinforcing member 3. By arranging the reinforcing member 3 with greater hardness, a certain strength is provided for the first sealing ring 2 and the second sealing ring 4, so that the second sealing ring 2 and the second sealing ring 4 are prevented from deforming when subjected to external force. The hardness of the first sealing ring 2 and the second sealing ring 4 is 80HD-100HD.

[0030] The positioning ring 6 is provided with a skirt 61, the outer diameter of the skirt 61 is between the inner diameter of the first connecting section 11 and the inner diameter of the contraction section 12, and when the positioning ring 6 is subjected to external force, the skirt 61 abuts against the second step 52. The positioning ring 6 is provided with a first limiting portion 62 extending into the contraction section 12, the second limiting portion 62 has a certain length, usually 2-4 mm. When the skirt 61 abuts against the second step 52, the first limiting portion 62 can effectively extrude the second sealing ring 4, thereby compressing the second sealing ring 4, the reinforcing member 3 and the first sealing ring 2 and pressing the second sealing ring against the first step 51.

[0031] The positioning ring 6 further includes a first limiting ring 63 arranged in the first connecting section 11. The head 82 of the clamping head 8 is provided with a first clamping groove 821, and one end of the head 82 extends a second limiting ring 81, the diameter of the second limiting ring 81 is smaller than that of the head 82, so that the liquid supply channel can extend into the second limiting ring 81, and the flange of the liquid supply channel is in contact with the inner end surface 823 of the head 82 and cannot enter the second limiting ring 81. The second limiting ring 81 is sleeved on the outer periphery of the first limiting ring 63, the inner diameter of the second limiting ring 81 matches the outer diameter of the first limiting ring 63, and the spring sheet 7 is sleeved on the outer periphery of the first limiting ring 63 and the second limiting ring 81. One end of the spring sheet 7 abuts against the skirt 61, and the other end of the spring sheet 7 abuts against the outer end surface 822 of the head 82. The spring force of the spring sheet 7 makes the skirt of the positioning ring 6 abut against the first step 51, so that the first limiting portion 62 effectively extrudes the second sealing ring 4, and the first sealing ring 3 is extruded on the second step 52 through the reinforcing member 3. The shell 1 is provided with an upper clamping groove 14 and a lower clamping groove 15,

[0032] The clamping joint 8 is provided with a second limiting part 83 and a first connecting segment limiting groove 16. The second limiting part 83 is arranged in the first limiting groove 16 and can reciprocate in the first limiting groove 16 along the axial direction, so that the clamping joint 8 can be switched between the open position and the locking position. When the clamping joint 8 is in the open position, the first clamping groove 821 is misaligned with the upper clamping groove 14 and the lower clamping groove 15. When the clamping joint 8 is in the locking position, the first clamping groove 821 is arranged corresponding to the upper clamping groove 14 and the lower clamping groove 15, that is, the first clamping groove 821 is aligned with the upper clamping groove 14 and the lower clamping groove 15 along the direction perpendicular to the axis.

[0033] The quick clamping piece further comprises a locking piece 9, which comprises a pressing part 91, a side part 92, a first fin part 93 and a second fin part 94. The upper surface of the pressing part 91 is planar. The side part 92 is located below the pressing part 92 and is provided with a first arc surface 921 and a second arc surface 922. The second arc surface 922 is located below the first arc surface 921, and the first arc surface 921 and the second arc surface 922 match the outer periphery of the first connecting segment 11. The first fin part 93 and the second fin part 94 extend downward from the pressing part 91. The first fin part 93 comprises two half fins 931. The lower part of the half fin 931 extends to form a fin foot 932. An arc-shaped opening is formed between the two half fins. When the second arc surface 922 contacts the outer periphery of the first connecting segment 11, the locking piece 9 is in an open state. At this time, the first fin part 93 passes through the upper clamping groove 14, the first clamping groove 821 is separated from the first clamping groove 821, and the clamping joint 8 can pass through the arc-shaped opening. When the first arc surface 921 contacts the outer periphery of the first connecting segment 11, the locking piece 9 is in a locking state. At this time, the first fin part 93 passes through the upper clamping groove 14, the first clamping groove 821, so as to realize the locking of the clamping joint 8. The fin foot 932 passes through the lower clamping groove 15 and extends out of the lower clamping groove 15. The length of the fin foot extending out of the outer surface of the connecting segment in the locking position is 2-5 mm, so that the locking of the locking piece is more stable, and the deformation of the locking piece caused by the long-term pressure in the liquid supply pipeline is prevented. The second fin part 94 is arranged opposite to the first fin part 93. The second fin part 94 matches the outer end surface of the first connecting segment 11, so as to further enhance the fixing effect of the locking piece and prevent it from being deformed by the pressure in the pipeline.

[0034] The assembled diagram of the quick clamping piece is shown in FIGS. 2-4. In the natural state, the second arc surface 922 matches the first connecting segment 11. The quick clamping piece is like Figure 3As shown, at this time, the locking member 9 is in the open state, the spring piece 7 pushes the clamping head 8 to the open position by the elastic force, and the first wing 93 of the locking member 9 is blocked by the clamping head 8 and cannot move. When the liquid supply pipeline is inserted into the clamping head, the liquid supply pipeline passes through the clamping head 8, the positioning ring 6, the second sealing ring 4, the reinforcing member 3 and the first sealing ring 2 in sequence and extends into the second connecting section 13, and the second sealing ring 4 and the first sealing ring 2 form a sealed connection between the liquid supply pipeline and the contraction end. During the insertion of the liquid supply pipeline, the flange on the liquid supply pipeline contacts the inner end face 823 of the clamping head 8 and pushes the clamping head 8 to move along the axial direction to the positioning ring 6 to the locking position, at this time, the locking member is pressed to move the locking member 9 downward to the locking position, at this time, the first wing 93 passes through the first clamping groove 821 to fix the clamping head 8 in the locking position, and the flange of the liquid supply pipeline is fixed between the first wing 93 and the inner end face 823 of the clamping structure 8, so that the fixation of the liquid supply pipeline and the quick clamping member is effectively realized. When it is needed to be taken out, the locking member 9 slides upward to the second arc surface 922 to match the connecting section 11, at this time, the spring piece 7 pushes the clamping head to move to the open position by the elastic force, at this time, the liquid supply pipeline and the flange can be easily taken out.

[0035] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A quick coupling member, characterized by, The shell (1) comprises a first connecting section (11), a contraction section (12), and a second connecting section (13), the first connecting section (11) and the contraction section (12) form a first step (51) at the junction, and the contraction section (12) and the second connecting section (13) form a second step (52) at the junction, The first connecting section (11) is provided with a clamping joint (8) and a positioning ring (6), a spring sheet (7) is arranged between the clamping joint (8) and the positioning ring (6), the spring force of the spring sheet (7) acts on the clamping joint (8) and the positioning ring (6), the clamping joint (8) is provided with a first clamping groove (821), the shell (1) is provided with an upper clamping groove (14) and a lower clamping groove (15), the clamping joint (8) can move in the first connecting section (11) along the axial direction to switch between the locked position and the open position, when the clamping joint (8) is in the locked position, the first clamping groove (821) is aligned with the upper clamping groove (14) and the lower clamping groove (15) in the direction perpendicular to the axis, when the clamping joint (8) is in the open position, the first clamping groove (821) is offset from at least one of the upper clamping groove (14) and the lower clamping groove (15) in the direction perpendicular to the axis; The quick clamping piece further comprises a locking piece (9), the locking piece (9) can switch between a locked position and an open position, when the locking piece (9) is in the locked position, a first wing part (93) of the locking piece (9) passes through the upper clamping groove (14) and the first clamping groove (821) and extends out of the lower clamping groove (15), when the locking piece is in the open position, the first wing part (93) is separated from the first clamping groove (821).

2. The quick hitch according to claim 1, characterized in that, The first wing part (93) comprises a wing foot (932) located below, the wing foot (932) extends out of the outer surface of the first connecting section (11) by 2-5 mm in the locked position.

3. The quick hitch according to claim 1, characterized in that, The positioning ring (6) comprises a first limiting ring (63), the clamping joint (8) is provided with a second limiting ring (81), the second limiting ring (81) is sleeved on the first limiting ring (63) and can move along the axial direction relative to the first limiting ring (63).

4. The quick hitch according to claim 1, characterized in that, The positioning ring (6) comprises a skirt (61) and a first limiting part (62), the spring force of the spring sheet (7) abuts the skirt (61) against the first step (51), the first limiting part (62) extends into the contraction section (12), the contraction section (12) is provided with a first sealing ring (2), and the first limiting part (62) can press the first sealing ring (2).

5. The quick hitch according to claim 4, characterized in that, The length of the first limiting part (62) is 2-4 mm.

6. The quick hitch according to claim 4, characterized in that, A reinforcing ring (3) and a second sealing ring (4) are further arranged between the first limiting part (62) and the first sealing ring (2), the hardness of the reinforcing ring (3) is greater than that of the first sealing ring (2) and the second sealing ring (4).

7. The quick hitch according to claim 1, characterized in that, The locking piece (9) comprises a pressing part (91) and a side part (92), the upper surface of the pressing part (91) is planar, the side part (92) comprises a first arc surface (921) and a second arc surface (922), and the first arc surface (921) and the second arc surface (922) are matched with the outer periphery of the first connecting section (11).

8. The quick hitch according to claim 1, characterized in that, The locking piece (9) further comprises a second fin part (94) which is oppositely arranged with the first fin part (93) and matched with the outer end surface of the first connecting section (11).

9. The quick hitch according to claim 6, characterized in that, The hardness of the first sealing ring (2) and the second sealing ring (4) is 80HD-100HD.

10. The quick hitch according to claim 1, characterized in that, The clamping joint (8) is provided with a second limiting part (83), the first connecting section (11) is provided with a limiting groove (16), the second limiting part (83) is arranged in the first limiting groove (16) and can reciprocate in the limiting groove (16) along the axial direction.

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