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CN-224209201-U - Electric tool

CN224209201UCN 224209201 UCN224209201 UCN 224209201UCN-224209201-U

Abstract

The utility model discloses an electric tool, which comprises a shell, a working element and a pipe fitting, wherein the shell is provided with a dust collecting port and a fixed end part, the fixed end part encloses a first channel communicated with the dust collecting port, the pipe fitting comprises a connecting end part connected to the fixed end part and a pipe fitting body connected to the connecting end part, the pipe fitting body is communicated with the first channel through the connecting end part, the connecting end part is provided with a second channel communicated with the first channel, the connecting end part comprises an outer pipe arranged on the periphery of the fixed end part, the outer pipe is provided with a notch extending along the axial direction of the outer pipe, and the notch is configured to allow the outer pipe to elastically deform in the radial direction so as to realize interference fit with the fixed end part. According to the electric tool, the axially extending notch is arranged at the connecting end part, so that the outer tube has elastic deformation capability, interference fit with the fixed end part is realized, multidirectional constraint is formed, stress can be uniformly dispersed, the assembly process is simplified, the sealing performance is enhanced, and the tightness, the reliability and the manufacturability are both considered.

Inventors

  • WANG JUN
  • ZHANG JINFENG

Assignees

  • 江苏东成工具科技有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (10)

  1. 1. The electric tool comprises a shell, a working element and a pipe fitting, wherein the shell encloses an accommodating space, the working element is rotationally connected to the shell, the pipe fitting is connected to the shell, a dust collecting opening is formed in the shell, the dust collecting opening is communicated with the accommodating space, the fixed end corresponds to the dust collecting opening, a first channel communicated with the dust collecting opening is enclosed by the fixed end, the pipe fitting comprises a connecting end connected to the fixed end and a pipe fitting body connected to the connecting end, the pipe fitting body is communicated with the first channel through the connecting end, and the electric tool is characterized in that a second channel communicated with the first channel is formed in the connecting end, the connecting end comprises an outer pipe arranged on the periphery of the fixed end, a notch extending along the axial direction of the outer pipe is formed in the outer pipe, and the notch is configured to allow the outer pipe to radially and elastically deform so as to achieve interference fit with the fixed end.
  2. 2. The power tool according to claim 1, wherein the connecting end portion further includes an inner tube surrounding an inner periphery of the outer tube, a fitting cavity is formed between the inner tube and the outer tube, and the fixed end portion extends into the fitting cavity to be connected with the connecting end portion.
  3. 3. The power tool according to claim 2, wherein the connecting end portion comprises a first connecting tube section and a second connecting tube section which are connected to each other, the first connecting tube section is composed of the inner tube and the outer tube, the first connecting tube section is connected with the fixed end portion, the second connecting tube section is connected with the tube body, the fixed end portion is provided with a first limiting portion, the first connecting tube section is provided with a second limiting portion, and the first limiting portion and the second limiting portion are mutually clamped so that the connecting end portion is fixed circumferentially relative to the fixed end portion.
  4. 4. The electric tool according to claim 3, wherein the outer periphery of the fixed end portion is provided with the first limiting portion, the outer tube is provided with the second limiting portion, the first limiting portion and the second limiting portion are two, the first limiting portion is respectively arranged on two opposite sides of the fixed end portion in the circumferential direction of the outer tube, and the second limiting portion is respectively arranged on two opposite sides of the outer tube and is clamped in a one-to-one correspondence manner.
  5. 5. The power tool according to claim 4, wherein the first limiting portion is a protrusion extending radially along the outer tube, the second limiting portion is formed by a notch inner wall of the outer tube, the protrusion is at least partially located in the notch and abuts against the notch inner wall, the size of the protrusion is larger than the size of the notch in the circumferential direction of the outer tube, at least one inner wall of the notch is provided with a limiting groove, and the protrusion is partially embedded into the limiting groove and abuts against the inner wall of the limiting groove to achieve axial fixation.
  6. 6. The electric tool according to claim 3, wherein the side wall of the fixed end portion facing the inner tube is provided with the first limiting portion, the outer wall of the inner tube is provided with the second limiting portion, the first limiting portion and the second limiting portion are multiple, the first limiting portions are circumferentially spaced along the fixed end portion, and the second limiting portions are circumferentially spaced along the inner tube and are clamped in one-to-one correspondence.
  7. 7. The power tool according to claim 6, wherein the first limiting portion is one of a rib and a groove extending axially along the fixed end portion, the second limiting portion is the other of a rib and a groove extending axially along the inner tube, the rib is at least partially embedded in the groove and abuts against an inner wall of the groove, and extending directions of the rib, the groove and the notch are parallel to each other.
  8. 8. The power tool according to any one of claims 2 to 7, further comprising a restraining member that is provided around an outer periphery of the outer tube and presses the outer tube against the fixed end portion.
  9. 9. The power tool according to claim 8, wherein the outer tube includes a third stopper portion provided on an outer peripheral wall of the outer tube, the third stopper portion being an annular groove extending in a circumferential direction of the outer tube, the restraining member being provided in the annular groove, or the third stopper portion being two annular ribs provided at intervals in an axial direction of the outer tube and extending in a circumferential direction of the outer tube, the restraining member being provided between the two annular ribs in the axial direction of the outer tube.
  10. 10. The power tool according to any one of claims 3 to 7, wherein the radial width of the fitting cavity is gradually increased from an end closer to the second connecting pipe section to an end farther from the second connecting pipe section in the axial direction of the first connecting pipe section, and the outer peripheral wall of the fixed end portion is formed in a tapered structure, the radial dimension of which is adapted to the trend of the fitting cavity in the axial direction.

Description

Electric tool Technical Field The utility model relates to the technical field of electric tools, in particular to a connecting structure of a pipe fitting for collecting scraps of an electric tool. Background The electric tool, such as an electric circular saw, can help a user to accurately and rapidly cut target objects such as steel, wood and the like, is widely used in the manufacturing industry, and is an important production tool. The electric circular saw can produce a large amount of fragments when cutting the target object, and these fragments fly out the back and can cause operational environment dirty, if the fragment gets into inside still can cause equipment damage of other equipment, the fragment gets into inside people's eye or the human body, still can bring health risk for operating personnel. At present, a through hole is generally formed in a shell of an electric circular saw, a dust collecting pipe is fixed corresponding to the through hole, and scraps generated by cutting a target object can enter the dust collecting pipe through the through hole and be collected in the dust collecting pipe, so that the scraps are prevented from flying out. However, the structure for fixing the dust collecting tube in the related art has low fixing strength to the hose, so that fastening failure of the dust collecting tube easily occurs, so that the dust collecting tube is separated from the housing, and the debris cannot be collected normally. Disclosure of utility model The utility model aims to provide an electric tool, which can improve the fastening strength of a pipe fitting and firmly connect the pipe fitting with the electric tool. In order to solve the above technical problems, the present utility model provides an electric tool, including a housing enclosing an accommodating space, a working element rotatably connected to the housing, and a pipe connected to the housing, wherein the housing is provided with a dust collecting port communicating with the accommodating space and a fixed end corresponding to the dust collecting port, the fixed end encloses a first channel communicating with the dust collecting port, the pipe includes a connecting end connected to the fixed end and a pipe body connected to the connecting end, and the pipe body is communicated with the first channel through the connecting end. The connecting end part comprises an outer tube arranged at the periphery of the fixed end part, a notch extending along the axial direction of the outer tube is formed in the outer tube, and the notch is configured to allow the outer tube to elastically deform in the radial direction so as to realize interference fit with the fixed end part. The outer tube can be radially and elastically deformed and in interference fit with the fixed end by arranging a notch extending along the axial direction at the connecting end. The structure utilizes radial clamping force generated by elastic deformation to form multidirectional constraint, so that circumferential torsion resistance and axial tensile strength are remarkably improved, connection looseness caused by high-frequency vibration is effectively resisted, meanwhile, the assembly process is simplified, the machining precision requirement is reduced, and the quick assembly requirement of an automatic production line is adapted. Optionally, the connecting end portion further includes an inner tube surrounding the inner periphery of the outer tube, an assembly cavity is configured between the inner tube and the outer tube, and the fixing end portion extends into the assembly cavity to be connected with the connecting end portion. An assembling cavity is formed between the inner tube and the outer tube, and the fixed end is inserted to form double-sided tight connection. The axially extending cavity provides accurate limiting guide, assembly deflection is avoided, circumferentially uniformly distributed gap structures can disperse alternating stress, fatigue failure caused by local stress concentration is restrained, and compared with traditional single-interface connection, connection stability and reliability under complex working conditions are remarkably improved. Optionally, the connecting end part comprises a first connecting pipe section and a second connecting pipe section which are mutually connected, the first connecting pipe section is composed of the inner pipe and the outer pipe, the first connecting pipe section is connected with the fixed end part, the second connecting pipe section is connected with the pipe fitting body, the fixed end part is provided with a first limiting part, the first connecting pipe section is provided with a second limiting part, and the first limiting part and the second limiting part are mutually clamped so that the connecting end part is circumferentially fixed relative to the fixed end part. The fixed end part and the first connecting pipe section are clamped through the limiting part to realize circumferen