Mechanical expansion pipe dismounting clamp
By incorporating an inclined extrusion cone and a bidirectional axially moving mandrel into the mechanical pipe expansion and disassembly fixture, the limitations of existing fixtures in narrow spaces and unidirectional clamping are solved, achieving stable bidirectional internal expansion clamping of pipe fittings, making it suitable for various scenarios.
Patent Information
- Application Number
- CN202423161664.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-20
AI Technical Summary
Existing pipe clamps are limited in use in narrow spaces and can only achieve unidirectional inward expansion clamping, which cannot meet the needs of efficient assembly and disassembly of small batch products.
A mechanical tube expansion and disassembly clamp was designed. By setting extrusion cones with opposite inclination directions at both ends of the extruder, the bidirectional axial movement of the mandrel drives the extruder to radially expand the expansion flap, thereby achieving bidirectional internal expansion clamping of the tube.
It achieves stable internal expansion clamping of pipe fittings in narrow spaces, has a wide range of applications, is highly efficient and convenient to operate, and overcomes the limitation of unidirectional force application.
Smart Images
Figure CN223685283U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of pipe clamp, and relates to a mechanical pipe expanding dismounting clamp. BACKGROUND
[0002] In order to meet the assembly and test requirements of products, more and more products need to install different bushing parts in holes, and after the first assembly and test, the products need to be disassembled to determine whether the parts will be worn after working or not. For example, various valve bodies, housings and damper products have relatively complex internal part assembly requirements, and need to be disassembled and tested after verification, which often directly affects the overall performance of the products.
[0003] At present, widely used hydraulic, pneumatic and electric dismounting tool clamps such as pneumatic chucks and hydraulic shears can meet the working conditions of many factories, but these all need oil sources and air pumps, which are not suitable for small batches or single products. These working methods cannot efficiently produce products. If a pneumatic or hydraulic tool is developed and produced for these small batches of products, the production cost and time cost will be greatly increased. At the same time, the above-mentioned pneumatic chuck and hydraulic shear clamps are external clamping structures, which need a large operating space and are difficult to be used in narrow space.
[0004] There are also clamps for clamping pipe in the prior art, but the existing internal expansion type pipe clamp usually only meets the force requirement in one direction, that is, only meets the internal expansion or pushing internal expansion. When the operation environment is limited and the force direction is limited, the existing internal expansion type clamp also has limitations.
[0005] Therefore, in view of the defects that the existing pipe external clamping type clamp cannot adapt to narrow space and the existing pipe internal expansion type clamp only meets the force requirement in one direction, the utility model discloses a mechanical pipe expanding dismounting clamp. UTILITY MODEL CONTENTS
[0006] The utility model discloses a mechanical pipe expanding dismounting clamp, which can adapt to narrow space requirements, efficiently and conveniently clamp pipes in two directions, is more widely applicable and more convenient to use.
[0007] The utility model discloses the following technical scheme:
[0008] The utility model provides a kind of mechanical pipe expansion disassembly clamp, including limiting sleeve, the inside coaxial of limiting sleeve is provided with mandrel, one end of the mandrel is provided with extrusion piece, the one end of extrusion piece close to mandrel and the one end away from mandrel are respectively provided with extrusion cone with opposite inclination angle, the outside coaxial of extrusion piece is provided with expansion petal, the two ends of the inner hole of expansion petal are respectively provided with pressure cone with corresponding two extrusion cone cooperation, limiting portion is arranged between the pressure cone of two ends, and the end portion of limiting sleeve is axially limited and clamped.
[0009] Mandrel moves axially, when mandrel moves axially towards first direction, one end extrusion cone is driven to the pressure cone of corresponding side, so that expansion petal is radially expanded to the inner tube wall of pipe element, then limiting sleeve is drawn, and is disassembled.When mandrel moves towards second direction opposite to first direction, the other end extrusion cone is driven to the pressure cone of corresponding side, so that expansion petal is radially expanded to the tube wall of pipe element, then limiting sleeve can be drawn, and is disassembled.No matter first direction or second direction axial driving force is applied to mandrel, expansion petal can be radially expanded to the inner tube wall of pipe element, and two-way inflation clamping of pipe element is realized.
[0010] In order to better realize the utility model, further, the limiting portion includes a limiting sleeve, two ends of the limiting sleeve are provided with expansion petals, a limiting groove is provided on the outer side of the limiting sleeve, and the end portion of the limiting sleeve is axially limited and clamped with the limiting groove.
[0011] In order to better realize the utility model, further, the end portion of the limiting sleeve is provided with a limiting ring, and the limiting ring is axially limited and clamped with the limiting groove.
[0012] In order to better realize the utility model, further, a hexagonal nut is coaxially fixed to the end of the limiting sleeve away from the extrusion piece, and the hexagonal nut is threadedly connected with the mandrel.
[0013] In order to better realize the utility model, further, a gasket is arranged between the hexagonal nut and the end portion of the limiting sleeve.
[0014] In order to better realize the utility model, further, a mounting pin perpendicular to the axis of the mandrel is arranged at the end of the mandrel away from the extrusion piece.
[0015] In order to better realize the utility model, further, a plug is coaxially arranged at each end of the extrusion piece, an expansion guide groove is arranged on the plug corresponding to the position of the expansion petal, and the expansion guide groove is slidably connected with the expansion petal.
[0016] In order to better realize the utility model, further, the width of the expansion guide groove is greater than or equal to the width of the expansion petal.
[0017] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0018] The utility model discloses a two -way axial movement of the mandrel is driven extrusion piece, and the extrusion cone surface of extrusion piece is driven to the pressure cone surface of the both ends of the inner hole of the expansion petal, and then the inner tube wall of the pipe fitting is firmly expanded and clamped in the case of two -way force, is applicable to the narrow space, and has no restriction to the force direction, and it is more efficient and convenient to use. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the structural diagram of mechanical type pipe expansion and dismounting clamp;
[0020] Figure 2 It is the structural diagram of extrusion piece;
[0021] Figure 3 It is the structural diagram of expansion petal;
[0022] Figure 4 It is Figure 1 A view of the utility model.
[0023] Wherein: 1 - limit sleeve;2 - mandrel;3 - hexagon nut;4 - gasket;5 - mounting pin;6 - plug;11 - limit ring;21 - extrusion piece;22 - extrusion cone surface;23 - expansion petal;24 - pressure cone surface;25 - limit sleeve;61 - expansion guide slot. DETAILED DESCRIPTION
[0024] The following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs.
[0025] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the utility model expressly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, they indicate the presence of a feature, step, operation, device, component and / or their combination.
[0026] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings themselves, and do not limit the structure. They are merely for the purpose of facilitating the description of this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0027] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0028] Example 1:
[0029] This embodiment provides a mechanical tube expansion and disassembly clamp, such as... Figure 1 As shown, the device includes a limiting sleeve 1, a mandrel 2 coaxially disposed inside the limiting sleeve 1, an extrusion member 21 disposed at one end of the mandrel 2, an extrusion cone surface 22 with opposite inclination angles disposed at the end of the extrusion member 21 near the mandrel 2 and the end away from the mandrel 2, respectively, an expansion flap 23 coaxially sleeved on the outside of the extrusion member 21, and a pressure-receiving cone surface 24 disposed at both ends of the inner hole of the expansion flap 23 corresponding to the two extrusion cone surfaces 22, and a limiting part disposed between the two pressure-receiving cone surfaces 24, the limiting part being axially limited and engaged with the end of the limiting sleeve 1.
[0030] like Figures 1-3 As shown, the first direction is horizontally to the left, and the second direction is horizontally to the right. An axial force in the first direction is applied to the mandrel 2, causing it to move axially to the left. When the mandrel 2 moves axially to the left, the extrusion cone 22 at the right end of the extruder 21 presses against the pressure cone 24 at the inner hole of the right end of the expansion flap 23, causing the right end of the expansion flap 23 to expand radially and internally fix the inner wall of the fitting. An axial force in the second direction is applied to the mandrel 2, causing it to move axially to the right. When the mandrel 2 moves axially to the right, the extrusion cone 22 at the left end of the extruder 21 presses against the pressure cone 24 at the inner hole of the left end of the expansion flap 23, causing the left end of the expansion flap 23 to expand radially and internally fix the inner wall of the fitting. Therefore, regardless of whether an axial force is applied to the mandrel 2 to the left or right, it can effectively cause the expansion flap 23 to expand internally and fix the inner wall of the fitting, adapting to different application scenarios.
[0031] Example 2:
[0032] A mechanical pipe expansion dismounting clamp is improved based on the embodiment 1, as shown in the figure, the limiting part comprises a limiting sleeve 25, the two ends of the limiting sleeve 25 are provided with expansion petals 23, the outer side of the limiting sleeve 25 is provided with a limiting groove, and the limiting groove is axially limited and clamped with the end of the limiting sleeve 1. Figures 1-3
[0033] The limiting groove is axially limited and clamped with the end of the limiting sleeve 1, so that the expansion petals 23 are prevented from moving axially greatly and from being separated from the inner hole of the pipe, and the limiting sleeve 25 is used to limit the axial movement of the expansion petals 23, so as to ensure the stability of the radial expansion of the expansion petals 23.
[0034] Further, the end of the limiting sleeve 1 is provided with a limiting ring 11 which is axially limited and clamped with the limiting groove, and the limiting ring 11 is fixedly installed on the end of the limiting sleeve 1 by screws, so as to limit the axial movement of the expansion petals 23.
[0035] The other parts of the embodiment are the same as those of the embodiment 1, and will not be described herein again.
[0036] Embodiment 3:
[0037] A mechanical pipe expansion dismounting clamp is improved based on the embodiment 1 or 2, as shown in the figure, the limiting sleeve 1 is coaxially and fixedly provided with a hexagonal nut 3 at the end away from the extruding piece 21, and the core shaft 2 is threadedly connected with the threaded hole of the hexagonal nut 3 in correspondence. Figure 1 The outer part of the core shaft 2 is provided with an external thread which is threadedly connected with the threaded hole of the hexagonal nut 3, and since the hexagonal nut 3 is fixedly installed on the end of the limiting sleeve 1, the core shaft 2 can be axially moved in the limiting sleeve 1 only by being rotated.
[0038] Further, the hexagonal nut 3 and the end of the limiting sleeve 1 are provided with a gasket 4, so that the hexagonal nut 3 is tightly attached to the end of the limiting sleeve 1, and the stability of the axial movement of the core shaft 2 is ensured.
[0039] Further, the end of the core shaft 2 away from the extruding piece 21 is provided with a mounting hole which is perpendicular to the axis of the core shaft 2, and a mounting pin 5 is inserted into the mounting hole, so that the core shaft 2 can be easily and labor-savingly rotated by rotating the mounting pin 5.
[0040] The other parts of the embodiment are the same as those of the embodiment 1 or 2, and will not be described herein again.
[0041] Embodiment 4:
[0042] An axial limiting structure is realized based on the segmented blocking ring of any one of embodiments 1-3, as shown in Figure 1 and Figure 4 As shown in the drawings, the two ends of the extrusion piece 21 are coaxially provided with plugs 6, the plugs 6 are provided with expansion guide grooves 61 corresponding to the positions of the expansion petals 23, and the expansion guide grooves 61 are in sliding fit connection with the expansion petals 23.
[0043] The plugs 6 are fixedly installed on the two ends of the extrusion piece 21 by slotted disc head screws, when the expansion petals 23 are radially expanded under pressure, the expansion petals 23 and the expansion guide grooves 61 are in sliding fit to realize guiding, and it is ensured that the expansion petals 23 can be smoothly expanded to fix the inner tube wall of the inner expansion tube.
[0044] Further, the width of the expansion guide groove 61 is greater than or equal to the width of the expansion petal 23.
[0045] The other parts of the embodiment are the same as any one of embodiments 1-3, and thus will not be described again.
[0046] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form, and any simple modification and equivalent change according to the technical essence of the utility model are within the protection scope of the utility model.
Claims
1. A mechanical pipe expansion dismounting clamp, comprising a limiting sleeve (1), the inside of the limiting sleeve (1) is coaxially provided with a mandrel (2), characterized in that, One end of the mandrel (2) is provided with an extrusion piece (21), and the extrusion piece (21) is provided with extrusion conical surfaces (22) with opposite inclination angles near one end of the mandrel (2) and away from one end of the mandrel (2), respectively, and the outer part of the extrusion piece (21) is coaxially provided with a dilatation petal (23), and the inner hole of the dilatation petal (23) is provided with pressure conical surfaces (24) corresponding to the two extrusion conical surfaces (22) at both ends, respectively, and a limiting part is arranged between the pressure conical surfaces (24) at both ends, and the limiting part is axially clamped with the end part of the limiting sleeve (1).
2. A mechanical tube expansion removal fixture according to claim 1, wherein, The limiting part includes a limiting sleeve (25), and both ends of the limiting sleeve (25) are provided with dilatation petals (23), and a limiting groove is arranged on the outer side surface of the limiting sleeve (25), and the limiting groove is axially clamped with the end part of the limiting sleeve (1).
3. A mechanical tube expansion removal fixture according to claim 2, wherein, The end part of the limiting sleeve (1) is provided with a limiting ring (11), and the limiting ring (11) is axially clamped with the limiting groove.
4. A mechanical tube expansion removal fixture according to any one of claims 1-3, characterized in that, The end part of the limiting sleeve (1) away from the extrusion piece (21) is coaxially fixedly provided with a hexagonal nut (3), and the mandrel (2) and the threaded hole of the hexagonal nut (3) are correspondingly and threadedly connected.
5. A mechanical tube expansion removal fixture according to claim 4, wherein, The hexagonal nut (3) and the end part of the limiting sleeve (1) are provided with a gasket (4).
6. A mechanical tube expansion removal fixture according to claim 5, wherein, The end part of the mandrel (2) away from the extrusion piece (21) is provided with a mounting pin (5) perpendicular to the axis of the mandrel (2).
7. A mechanical tube expansion removal fixture according to any one of claims 1-3, characterized in that, Both ends of the extrusion piece (21) are coaxially provided with plug covers (6), and the plug covers (6) are provided with dilatation guide grooves (61) corresponding to the positions of the dilatation petals (23), and the dilatation guide grooves (61) are slidably connected with the dilatation petals (23).
8. A mechanical tube expansion removal fixture according to claim 7, wherein, The width of the dilatation guide groove (61) is greater than or equal to the width of the dilatation petal (23).