Tool head quick release structure, pipe expander, flaring machine, electric tool, machine body and tool head

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to a tool head quick release structure, a pipe expander, a flaring machine, an electric tool, a machine body and a tool head. In order to overcome the defect that a refrigeration maintenance electric tool is used in one machine, the technical scheme adopted by the utility model is as follows: the tool head quick-release structure comprises a machine body comprising a machine shell and a driving shaft; the tool head comprises a tool shell and a driven shaft; a guide structure is formed between the tool head and the machine body; the machine body further comprises a swinging shifting anti-disengaging assembly arranged in the machine shell, the shifting anti-disengaging assembly comprises a plurality of movable blocks distributed at intervals in the circumferential direction and a radial wall, anti-disengaging gaps are formed between the movable blocks and the radial wall, and the tool shell comprises a plurality of axial anti-disengaging blocks. The shifting anti-disengaging assembly is switched between the disassembling position and the anti-disengaging position through swinging. The utility model has the beneficial effects that the same machine body can be matched with different tool heads; disassembly and assembly are fast and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric tools, and particularly relates to a tool head quick-disassembly structure, a tube expander, a flaring machine, an electric tool, a body and a tool head. Background Art

[0002] During refrigeration equipment maintenance, copper tube flaring, expansion, drilling, and screw tightening are often required. Flaring involves expanding the copper tube wall outward at a certain angle to form a bell mouth, allowing for better connections between the tube and fittings. Expanding increases the inner and outer diameters of a section of the tube end.

[0003] Currently, electric belling machines and electric tube expanders are available on the market to replace the manual method. However, these machines are single-purpose, which is not only expensive but also increases the burden on operators to carry. Summary of the Invention

[0004] This utility model addresses the limitations of single-use refrigeration maintenance power tools by providing a quick-release tool head mechanism, allowing the same tool body to be adapted to different tool heads. By replacing different tool heads, different operations such as flaring, expanding tubes, and drilling can be performed. The utility model also provides an electric tube expander, an electric flaring machine, a multifunctional power tool, a tool body, and a tool head.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions: a tool head quick-release structure for quick disassembly and assembly between the tool head and the tool body, the tool head quick-release structure comprising:

[0006] The body includes a housing, a driving shaft disposed in the housing, and a motor driving the driving shaft through a reduction transmission assembly;

[0007] A tool head includes a tool housing and a driven shaft disposed in the tool housing;

[0008] Wherein, a guide structure is formed between the tool head and the body;

[0009] In which, the fuselage also includes a swingable anti-slip assembly arranged in the casing, and the anti-slip assembly switches between the disassembly position and the working position by swinging. The anti-slip assembly includes a movable block, and the movable block has an anti-slip gap on the side away from the tool head. The tool casing includes an axial anti-slip block located at the axial end. When the anti-slip assembly is in the disassembly position, the projection of the axial anti-slip block on the radial plane is completely offset from the movable block under the guidance of the guide structure. When the anti-slip assembly is in the anti-slip position, the projections of the axial anti-slip block and the movable block on the radial plane at least partially overlap.

[0010] The present invention provides a quick-release tool head structure with a guide structure and an axial anti-slip structure. The guide structure allows the tool head to move only axially relative to the tool body. The axial anti-slip structure includes a swingable anti-slip assembly including a movable block disposed within the tool housing and an axial anti-slip block formed on the tool housing. During assembly, the tool head can be inserted into the tool body by simply placing the movable block of the anti-slip assembly in a disassembly position completely offset from the axial anti-slip block. Once inserted, the anti-slip assembly is rotated to a disassembly position where the movable block and the axial anti-slip block are not completely offset, thereby achieving connection between the tool head and the tool body. During disassembly, the tool head can be removed by simply rotating the anti-slip assembly to a disassembly position where the movable block and the axial anti-slip block are completely offset. This allows for quick assembly and disassembly of the tool head and the tool body, allowing the same tool body to accommodate different tool heads. The operation is simple and convenient, and the structure is stable and reliable. The radial surface where the projections of the axial anti-slip block and the movable block at least partially overlap is a circular cross-section of the driving shaft or the driven shaft. The driving shaft and the driven shaft are coaxially arranged.

[0011] As an improvement, the anti-slip assembly includes a linked anti-slip ring and an operating member, the movable block is formed on the radial inner side of the anti-slip ring, a swing groove is opened on the housing, and the operating member forms an operating portion protruding from the swing groove.

[0012] As an improvement, the anti-slip ring includes an annular portion, the radial outer side of which extends radially outward to form a connecting block, and the radial inner side of the operating member extends radially inward to form a U-shaped block, with the connecting block located within the U-shaped block and linked to it. This structure of the toggle anti-slip assembly facilitates assembly to the fuselage.

[0013] As an improvement, there are multiple movable blocks and they are evenly distributed around the circumference, and there are multiple axial anti-slip blocks and they are evenly distributed around the circumference, so that the force is evenly applied everywhere.

[0014] As an improvement, the anti-slip ring includes a radial wall, and the anti-slip gap is formed between the movable block and the radial wall.

[0015] As an improvement, an anti-sway rib extends radially inward from the operating member, and multiple circumferentially distributed fixing ribs extend from the swing groove of the housing. The gaps between the fixing ribs form anti-sway grooves that fit over the anti-sway ribs. This prevents the anti-sway ribs from swinging unless subjected to external forces other than operation, thereby preventing them from falling off. The fixing ribs are formed on the clamping block.

[0016] As an improvement, the swing groove includes a first arc-shaped groove on the inner side and a second arc-shaped groove on the outer side that are connected to each other. The operating part has an arc-shaped portion. The curvature of the first arc-shaped groove is greater than the curvature of the arc-shaped portion. A clamping block is formed at both ends of the arc-shaped portion, and a clamping portion that cooperates with the clamping block is formed in the middle of the first arc-shaped groove of the swing groove.

[0017] As an improvement, the end of the fuselage is formed with a radially extending open slot, and the tool head is formed with a T-shaped portion adapted to the open slot, with the radially outer end of the T-shaped portion being larger and the inner end being smaller, and the open slot and the T-shaped portion forming the guide structure. This guide structure facilitates alignment and processing.

[0018] As an improvement, the T-shaped portion is located at the radial lower end of the tool head; the axial end of the fuselage extends toward the tool head to form a protruding guide bulge, and the opening groove is provided on the guide bulge.

[0019] As an improvement, the axial end of the body extends to form a plurality of circumferentially distributed anti-rotation grooves, and the axial end of the tool head extends to form a plurality of circumferentially distributed anti-rotation blocks, which cooperate with the anti-rotation grooves. Torque is primarily borne by the anti-rotation grooves and the anti-rotation blocks, rather than by the guide structure.

[0020] As an improvement, the body further includes a transmission disc mounted on the driving shaft. The transmission disc rotates with the driving shaft and is axially movable relative to the driving shaft. A spring member acts on the transmission disc to force it toward the tool head. Because the stopping angle of the driving shaft is not fixed, there is no guarantee that the angles of the driven shaft and the driving shaft will align when the tool head is inserted into the body. By making the driving shaft movable, even if the angles of the driven shaft and the driving shaft do not align during insertion, the spring member can still rotate the driving shaft to the desired angle and maintain it after the driving shaft rotates.

[0021] As an improvement, the radial outer end of the transmission disc forms a circumferential transmission block, the driven shaft has a hollow portion, and a transmission groove adapted to the transmission block is formed in the hollow portion; a limit pin is provided on the driving shaft, and the transmission disc is located between the limit pin and the elastic member.

[0022] A multifunctional electric tool comprises a body and a plurality of tool heads, wherein the body and the plurality of tool heads adopt the aforementioned tool head quick-release structure.

[0023] As an improvement to the multifunctional electric tool, the plurality of tool heads include at least two of a tube expanding tool head, a flaring tool head and a drilling tool head.

[0024] As an improvement to the multifunctional power tool, one of the tool heads is a tube expansion tool head, which includes a force transmission member anti-rotationally connected to the driven shaft, the force transmission member having a force transmission surface with a gradually changing axial distance from the driven shaft, and the tube expansion tool head also includes a plunger, and the force transmission surface of the force transmission member abuts against the plunger.

[0025] As an improvement to the multifunctional electric tool, an axial force bearing is provided between the force transmission member and the tool housing, and a radial force bearing is provided outside the force transmission member.

[0026] As an improvement to the multifunctional electric tool, the tool housing of the tube expanding tool head has a force-bearing end wall, and the tube expanding tool head also includes a Z-shaped force-bearing member located outside the force transmitting member, the force-bearing member abuts the force-bearing end wall, the force transmitting member has a plurality of steps, the axial force bearing is located on one of the steps, the radial force bearing is located on one of the steps, and there is a radial gap between the force transmitting member, the axial force bearing and the force receiving member.

[0027] As an improvement to the multifunctional power tool, one of the tool heads is a flaring tool head, and the multifunctional power tool also includes a chuck assembly detachably connected to the flaring tool head, the chuck assembly includes a connecting head, a guide portion is formed on the connecting head near one end of the flaring tool head, and an anti-slip groove is formed on the radially outer side of the guide portion, the flaring tool head includes a chuck seat near one end of the connecting head, the chuck seat has a plurality of circumferentially distributed steel ball holes, radially movable steel balls are embedded in the steel ball holes, the inner end diameter of the steel ball holes is smaller than the steel balls, an axial movable part is provided on the outside of the chuck seat, and a compression spring acts on the axial movable part to make it move toward the direction of the chuck assembly.

[0028] As an improvement to the multifunctional power tool, a semicircular portion is formed on one end of the connecting head away from the flaring tool head, and a first clamping semicircle is fixed in the semicircular portion. The chuck assembly also includes a semicircular piece pivotally connected to the connecting head, and a second clamping semicircle is fixed in the semicircular piece. The chuck assembly also includes a locking assembly rotatably connected to the semicircular portion, and the locking assembly includes a connecting plate rotatably connected to the semicircular portion and a locking piece rotatably connected to the rotating piece. The locking piece has a control portion and a locking portion; a swingable baffle is also provided between the semicircular portion and the flaring tool head.

[0029] As an improvement to the multifunctional power tool, one of the tool heads is a flaring tool head, and the multifunctional power tool also includes a clamping assembly, which includes a clamping seat fixedly connected to the flaring tool head, a locking assembly and a tube clamping assembly arranged on the clamping seat, a radially penetrating guide groove for guiding the tube clamping assembly, a locking groove is provided on the tube clamping assembly, and the locking assembly includes a positioning locking member that passes through the clamping seat and is screwed into the locking groove.

[0030] As an improvement to the multifunctional electric tool, a positioning groove is further provided on the tube clamping assembly, and a positioning assembly is provided on the clamping seat. The positioning assembly includes a positioning member and an elastic member that generates a force for the positioning member to move toward the tube clamping assembly.

[0031] The electric tool body is the aforementioned body.

[0032] An electric tool head, wherein the electric tool head is the aforementioned tool head.

[0033] The beneficial effects of the tool head quick-release structure of the utility model are as follows: a guide structure and an axial anti-slip structure are formed between the tool head and the body, and the guide structure enables the tool head to move only axially relative to the body, and the axial anti-slip structure comprises a swingable toggle anti-slip assembly arranged in the housing and a plurality of axial anti-slip blocks formed on the tool housing. During assembly, it is only necessary to place the movable block of the toggle anti-slip assembly in a disassembly position that is completely staggered with the axial anti-slip blocks so that the tool head can be inserted into the body. After insertion into place, the toggle anti-slip assembly is rotated to the anti-slip position in which the movable block and the axial anti-slip blocks are not completely staggered, thereby realizing the connection between the tool head and the body; during disassembly, it is only necessary to rotate the toggle anti-slip assembly to the disassembly position in which the movable block and the axial anti-slip blocks are completely staggered so that the tool head can be pulled out; quick disassembly and assembly between the tool head and the body can be realized, so that the same body can be adapted to different tool heads, and the operation is simple and convenient, and the structure is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of the multifunctional electric tool according to the first embodiment of the present utility model when used as a tube expander.

[0035] Figure 2 This is a cross-sectional view of the multifunctional electric tool according to the first embodiment of the present invention when used as a tube expander.

[0036] Figure 3 This is an exploded view of the multifunctional electric tool according to the first embodiment of the present utility model when used as a tube expander.

[0037] Figure 4 It is a structural schematic diagram of the body of the multifunctional electric tool according to the first embodiment of the present utility model.

[0038] Figure 5 It is a cross-sectional view (radial direction) of the body of the multifunctional electric tool according to the first embodiment of the present invention.

[0039] Figure 6 This is an exploded view of the anti-drop assembly of the multifunctional electric tool according to the first embodiment of the present invention.

[0040] Figure 7 This is a partial exploded view of the tube expansion tool head of the multifunctional electric tool body according to the first embodiment of the present invention.

[0041] Figure 8 This is a structural diagram of the multifunctional electric tool according to the first embodiment of the present utility model when used as a belling machine.

[0042] Figure 9 This is a cross-sectional view of the multifunctional electric tool according to the first embodiment of the present invention when used as a belling machine.

[0043] Figure 10This is an exploded view of the multifunctional electric tool according to the first embodiment of the present utility model when used as a belling machine.

[0044] Figure 11 It is a structural schematic diagram of the chuck assembly of the multifunctional electric tool according to the first embodiment of the present utility model when used as a belling machine.

[0045] Figure 12 This is a structural diagram of the multifunctional electric tool according to the first embodiment of the present utility model when used as an electric drill.

[0046] Figure 13 This is a cross-sectional view of the multifunctional electric tool according to the first embodiment of the present utility model when used as an electric drill.

[0047] Figure 14 This is a structural diagram of the multifunctional electric tool of the second embodiment of the present utility model when used as another belling machine.

[0048] Figure 15 This is a cross-sectional view of the multifunctional electric tool according to the second embodiment of the present invention when used as another belling machine.

[0049] Figure 16 This is a schematic structural diagram of the multifunctional electric tool of the second embodiment of the present invention when used as another belling machine, excluding the tube clamping assembly.

[0050] Figure 17 This is a structural schematic diagram of the tube clamping assembly of the multifunctional electric tool according to the second embodiment of the present invention when used as another belling machine.

[0051] In the figure, 01, fuselage; 02, expansion tool head; 03, expansion base; 04, flaring tool head; 05, chuck assembly; 06, drill bit;

[0052] 1. Housing; 11. Guide protrusion; 12. Opening groove; 13. Anti-rotation groove; 14. Swinging groove;

[0053] 2. Tool housing; 21. Axial anti-slip block; 22. Anti-rotation block; 23. T-shaped portion;

[0054] 3. Plunger;

[0055] 4. Toggle anti-slip assembly; 41. Anti-slip ring; 411. Annular portion; 412. Movable block; 413. Radial wall; 414. Anti-slip gap; 415. Connecting block; 42. Operating member; 421. Arc-shaped portion; 422. U-shaped block; 423. Operating portion; 424. Anti-slip rib; 425. Clamping block;

[0056] 5. Active connection assembly; 50. Active shaft; 51. Transmission plate; 52. Elastic member; 53. Limit pin;

[0057] 6. Force transmission assembly; 60. Driven shaft; 61. Force transmission member; 611. Force transmission surface; 62. Force receiving member; 63. Axial force bearing; 64. Radial force bearing;

[0058] 71. Chuck seat; 72. Connector; 721. Anti-slip groove; 73. Steel ball; 74. Axial movable member; 75. Compression spring; 76. First clamping semicircle; 77. Semicircular member; 78. Second clamping semicircle; 79. Locking assembly; 791. Connecting piece; 792. Locking piece; 70. Blocking piece;

[0059] 81. Clamping seat; 811. Guide groove; 82. Locking assembly; 83. Tube clamping assembly; 831. Positioning groove; 84. Positioning assembly. DETAILED DESCRIPTION

[0060] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0061] Example 1

[0062] See also Figures 1 to 13 The multifunctional electric tool of the first embodiment of the present invention comprises a body 01 and three tool heads, the three tool heads are Figures 1 to 7 The expansion tool head 02 shown, Figures 8 to 11 The flaring tool head 04 shown and Figure 12 and Figure 13 The drilling tool head shown (the drilling tool head can also be used as a screw driving tool head) has the same connection structure with the fuselage 01, so the same fuselage 01 can be adapted to three different types of tool heads at the same time.

[0063] See also Figures 1 to 7 The multifunctional electric tool of the first embodiment of the present invention, when used as a tube expander, comprises:

[0064] The body 01 includes a housing 1 and a driving shaft 50 disposed in the housing 1 and driven by a motor through a reduction transmission assembly;

[0065] The tube expansion tool head 02 includes a tool housing 2 and a driven shaft 60 disposed in the tool housing 2;

[0066] Wherein, a guide structure is formed between the tool head and the body 01;

[0067] In which, the fuselage 01 also includes a swingable anti-slip assembly 4 provided in the casing 1, and the anti-slip assembly 4 switches between the disassembly position and the working position by swinging. The anti-slip assembly 4 includes a plurality of movable blocks 412 and a radial wall 413 distributed circumferentially, and an anti-slip gap 414 is provided between the movable block 412 and the radial wall 413. The tool housing 2 includes a plurality of axial anti-slip blocks 21 distributed circumferentially at an axial end, and the axial size of the axial anti-slip block 21 is adapted to the anti-slip gap 414. When the anti-slip assembly 4 is located in the disassembly position, the projection of the axial anti-slip block 21 on the radial plane is completely staggered from the movable block 412 under the guidance of the guide structure. When the anti-slip assembly 4 is located in the anti-slip position, the projections of the axial anti-slip block 21 and the movable block 412 on the radial plane at least partially overlap.

[0068] See 3 and Figure 6 In the present invention, there are four movable blocks 412 on the anti-slip assembly 4, and they are evenly distributed around the circumference. There are four axial anti-slip blocks 21 on the expansion tool head 02, and they are evenly distributed around the circumference. In other embodiments, the movable blocks 412 and the axial anti-slip blocks 21 can also be three, five, or other numbers.

[0069] In this embodiment, the toggle anti-slip assembly 4 includes a linked anti-slip ring 41 and an operating member 42. The anti-slip ring 41 includes an annular portion 411. A radial wall 412 is formed radially inwardly of the anti-slip ring 41. The housing 1 defines a swing groove 14, and the operating member 42 forms an operating portion 423 that protrudes from the swing groove 14. The radial wall 412 of the anti-slip ring 41 provides the anti-slip ring 41 with superior structural strength and resists deformation. The radial wall 412 also serves as a positioning mechanism.

[0070] In other embodiments, the anti-slip ring 41 may not have the radial direction 412 , and the anti-slip gap 413 is formed between the movable block 412 and the fuselage 1 .

[0071] In this embodiment, the radially outer side of the annular portion 411 extends radially outward to form a connecting block 415, and the radially inner side of the operating member 42 extends radially inward to form a U-shaped block 422. The connecting block 415 is located within and in conjunction with the U-shaped block 422. This structure of the toggle anti-detachment assembly 4 facilitates assembly of the toggle anti-detachment assembly 4 to the body 01.

[0072] In this embodiment, an anti-sway rib 424 is formed on the radially inner side of the operating member 42. A plurality of circumferentially distributed fixing ribs are formed in the swing groove 14 of the housing 1. The gaps between the fixing ribs form anti-sway grooves that fit over the anti-sway ribs 424. This prevents the anti-sway ribs 424 from swinging unless subjected to external forces other than operation, thereby preventing them from falling off. The fixing ribs are formed on the clamping block 425.

[0073] See also Figure 5 and Figure 6 In this embodiment, the operating member 42 is engaged with the housing 1. The operating member 42 has an arcuate portion 421 with latches 425 at both ends. The swing groove 14 includes a first inner arcuate groove and a second outer arcuate groove that are interconnected. The middle portion of the first arcuate groove of the swing groove 14 forms a latching portion. The operating member 42 is engaged with the swing groove 14 via the latching portion and the latching portion 425, thereby allowing the operating member 42 to be engaged and swingable within the swing groove 14. During installation, the operating member 42 is primarily secured to the swing groove 14 of the housing 1 by deformation of the operating member 42.

[0074] See also Figure 2 In this embodiment, the housing 1 forms a housing cavity, in which the motor and reduction transmission assembly are located. The radial portion of the housing cavity is opened, and the driving shaft 50 extends out of the housing cavity. The driving shaft 50 is provided with a bearing, and the outer side of the bearing is fixedly connected to the anti-slip ring 41. The housing 1 also forms a grip portion. The body 01 includes a battery pack that is located at the bottom of the housing 1 and is detachable from the housing 1. The body 01 also includes a speed and torque adjustment structure and a steering adjustment structure. The other structures of the body 01, except for the connection structure with the tool head, can refer to the existing technology.

[0075] See also Figure 2 and Figure 4 In this embodiment, the end of the body 01 is formed with a radially extending open slot 12, and the tool head is formed with a T-shaped portion 23 that matches the open slot 12. The radially outer end of the T-shaped portion 23 is larger and the inner end is smaller. The open slot 12 and the T-shaped portion 23 form the guide structure. This guide structure facilitates alignment of the tool head with the body 01 and facilitates machining.

[0076] In this embodiment, the T-shaped portion 23 is located at the radially lower end of the tool head; the axial end of the body 01 extends toward the tool head to form a protruding guide protrusion 11, which defines the opening slot 12. The upper surface of the guide protrusion 11 is horizontal, and the thickness of the guide protrusion 11 is consistent with the height of the smaller diameter section of the T-shaped portion 23. A flat surface is formed on the tool housing 2 of the expansion tool head 02 to mate with the upper surface of the guide protrusion 11. The mating between the T-shaped portion 23 of the expansion tool head 02 and the guide protrusion 11 of the body 01 ensures that the expansion tool head 02 can only move horizontally along the axial direction and cannot move in other directions (such as radial movement or rotation).

[0077] See also Figure 3 and Figure 4In this embodiment, the axial end of the body 01 extends to form a plurality of circumferentially distributed anti-rotation grooves 13, and the axial end of the tool head extends to form a plurality of circumferentially distributed anti-rotation blocks 22. The anti-rotation blocks 22 cooperate with the anti-rotation grooves 13. Torque is primarily borne by the anti-rotation grooves 13 and the anti-rotation blocks 22, rather than by the guide structure. There are six anti-rotation grooves 13 and six anti-rotation blocks 22. In other embodiments, the number of anti-rotation grooves 13 and the number of anti-rotation blocks 22 can also be three, four, or other numbers.

[0078] See also Figure 2 and Figure 4 In this embodiment, the body 01 further includes a transmission disc 51 mounted on the driving shaft 50. The transmission disc 51 rotates with the driving shaft 50 and is capable of axial movement relative to the driving shaft 50. A spring member 52 acts on the transmission disc 51 to force it toward the tool head. Because the stop angle of the driving shaft 50 is not fixed, there is no guarantee that the angles of the driven shaft 60 and the driving shaft 50 will align when the tool head is inserted into the body 01. By making the driving shaft 50 movable, even if the angles of the driven shaft 60 and the driving shaft 50 do not align during insertion, after the driving shaft 50 rotates, the spring member 52 can enable the driving shaft 50 to rotate to the desired angle and maintain it.

[0079] In this embodiment, the radial outer end of the transmission disc 51 forms a circumferential transmission block, and the driven shaft 60 has a hollow portion, in which a transmission groove adapted to the transmission block is formed. The transmission block is tooth-shaped.

[0080] In this embodiment, the driving shaft 50 is provided with a stop pin 53, and the transmission plate 51 is positioned between the stop pin 53 and the elastic member 52. The stop pin 53 prevents the transmission plate 51 from falling out. The cross-section of the driving shaft 50 is a large circular shape, that is, its outline is an arc larger than a semicircle with straight lines connecting the two ends of the arc. The hole in the transmission plate 51 is also a large circular shape.

[0081] See also Figure 2 and Figure 7 In this embodiment, the tube expansion tool head 02 includes a force transmission member 61 anti-rotationally connected to the driven shaft 60, and the force transmission member 61 has a force transmission surface 611 with a gradually changing axial distance from the driven shaft 60. The tube expansion tool head 02 also includes a plunger 3, and the force transmission surface 611 of the force transmission member 61 abuts against the plunger 3.

[0082] In this embodiment, an axial force bearing 63 is provided between the force transmission member 61 and the tool housing 2 , and a radial force bearing 64 is provided outside the force transmission member 61 .

[0083] In this embodiment, the tool housing 2 of the tube expansion tool head 02 has a force-bearing end wall, and the tube expansion tool head 02 also includes a Z-shaped force-bearing member 62 located outside the force transmission member 61, and the force-bearing member 62 abuts the force-bearing end wall. The force transmission member 61 has multiple steps, and the axial force bearing 63 is located on one of the steps. The radial force bearing 64 is located on one of the steps. There is a radial gap between the force transmission member 61, the axial force bearing 63 and the force member 62.

[0084] In this embodiment, the force from the plunger 3 acts directly on the force transmission member 61 , and finally acts on the radial outer wall of the accommodating cavity of the casing 1 of the fuselage 01 through the axial force bearing 63 and the force receiving member 62 .

[0085] In this embodiment, the structure of the plunger 3 and other components that enable the expansion head to move back and forth in a straight line can refer to the existing technology.

[0086] In this embodiment, the expansion socket 03 is threadedly connected to the expansion tool head 02 and is detachable. The structure of the expansion socket 03 can be referred to Figure 2 and prior art.

[0087] In this embodiment, a guide structure is provided between the tube expansion tool head 02 and the fuselage 01, so that the tube expansion tool head 02 can only move horizontally axially relative to the fuselage 01; the setting of the anti-slip assembly 4 and the axial anti-slip block 21 on the tube expansion tool head 02 enables the tube expansion tool head 02 to be axially prevented from slipping off (axially fixed) from slipping off (axially fixed) after the tube expansion tool head 02 is inserted into the fuselage 01; an anti-swing structure is provided between the anti-slip assembly 4 and the fuselage 01, and the anti-slip assembly 4 will not move when there is no external force from the electric tube expander, thereby ensuring When there is no external force, the expansion tool head 02 and the body 01 will not separate axially; the connecting disk on the driving shaft 50 rotates with the driving shaft 50 and can move axially relative to the driving shaft 50, and an elastic member 52 acts on the driving shaft 50, so that even if the driven shaft 60 and the driving shaft 50 (transmission disk 51) are not aligned, the driven shaft 60 can be inserted into place and the transmission disk 51 can drive the driven shaft 60 to rotate after the driving shaft 50 rotates; the special setting of the force transmission member 61 with a force transmission surface 611 makes it possible for the plunger 3 to move back and forth in a straight line by rotating the force transmission member 61.

[0088] In this embodiment, the tool housing 2 of the tube expansion tool head 02 is assembled from two half shells to facilitate the installation of components in the tool housing 2 .

[0089] See also Figures 8 to 11 The multifunctional electric tool of the first embodiment of the present invention, when used as a belling machine, comprises:

[0090] The body 01 includes a housing 1 and a driving shaft 50 disposed in the housing 1 and driven by a motor through a reduction transmission assembly;

[0091] The flaring tool head 04 includes a tool housing 2 and a driven shaft 60 disposed in the tool housing 2;

[0092] Wherein, a guide structure is formed between the tool head and the body 01;

[0093] In which, the fuselage 01 also includes a swingable anti-slip assembly 4 provided in the casing 1, and the anti-slip assembly 4 switches between the disassembly position and the working position by swinging. The anti-slip assembly 4 includes a plurality of movable blocks 412 and a radial wall 413 distributed circumferentially, and an anti-slip gap 414 is provided between the movable block 412 and the radial wall 413. The tool housing 2 includes a plurality of axial anti-slip blocks 21 distributed circumferentially at an axial end, and the axial size of the axial anti-slip block 21 is adapted to the anti-slip gap 414. When the anti-slip assembly 4 is located in the disassembly position, the projection of the axial anti-slip block 21 on the radial plane is completely staggered from the movable block 412 under the guidance of the guide structure. When the anti-slip assembly 4 is located in the anti-slip position, the projections of the axial anti-slip block 21 and the movable block 412 on the radial plane at least partially overlap.

[0094] In this embodiment, the connection structure between the flaring tool head 04 and the body 01, that is, the quick-release structure of the flaring tool head 04, is shown in FIG. Figures 1 to 6 .

[0095] In this embodiment, the driven shaft 60 rotates to move the screw and the conical head on the screw to achieve the expansion structure. Figure 9 and prior art.

[0096] In this embodiment, the flaring machine also includes a chuck assembly 05 detachably connected to the flaring tool head 04, and the chuck assembly 05 includes a connecting head 72, and the connecting head 72 forms a guide portion near one end of the flaring tool head 04, and an anti-slip groove 721 is formed on the radial outer side of the guide portion. The flaring tool head 04 includes a chuck seat 71 near one end of the connecting head 72, and the chuck seat 71 has a plurality of circumferentially distributed steel ball holes, and radially movable steel balls 73 are embedded in the steel ball holes. The inner end diameter of the steel ball hole is smaller than the steel ball 73, and an axial movable part 74 is provided on the outside of the chuck seat 71, and a compression spring 75 acts on the axial movable part 74 to make it move toward the chuck assembly 05.

[0097] In this embodiment, the anti-slip groove 721 is roughly an isosceles trapezoid with a larger outer portion and a smaller inner portion. A guide structure is also formed between the chuck assembly 05 and the chuck base 71, which allows the chuck assembly 05 to move only axially relative to the chuck base 71. The guide structure includes a plurality of circumferentially distributed guide ribs formed on the chuck assembly 05 and a plurality of guide grooves formed on the chuck base 71. By operating the circumferential movable member, the steel ball 73 is switched between two positions where radial movement is possible and where radial movement is not possible, thereby achieving assembly and disassembly of the chuck assembly 05. By disassembling and assembling the chuck assembly 05, different chuck assemblies 05 can be replaced to accommodate copper tubes of different diameters.

[0098] In this embodiment, the connecting head 72 forms a semicircular portion at one end away from the flaring tool head 04, and a first clamping semicircle 76 is fixedly connected to the semicircular portion. The chuck assembly 05 also includes a semicircular part 77 pivotally connected to the connecting head 72, and a second clamping semicircle 78 is fixedly connected to the semicircular part 77. The chuck assembly 05 also includes a locking assembly 79 rotatably connected to the semicircular portion. The locking assembly 79 includes a connecting plate 791 rotatably connected to the semicircular portion and a locking member 792 rotatably connected to the rotating plate. The locking member 792 has a control portion and a locking portion. A swingable baffle 70 is also provided between the semicircular portion and the flaring tool head 04.

[0099] See also Figure 12 and Figure 13 The multifunctional electric tool of the first embodiment of the present invention, when used as an electric drill, comprises:

[0100] The body 01 includes a housing 1 and a driving shaft 50 disposed in the housing 1 and driven by a motor through a reduction transmission assembly;

[0101] The drilling tool head comprises a tool housing 2 and a driven shaft 60 disposed in the tool housing 2;

[0102] Wherein, a guide structure is formed between the tool head and the body 01;

[0103] In which, the fuselage 01 also includes a swingable anti-slip assembly 4 provided in the casing 1, and the anti-slip assembly 4 switches between the disassembly position and the working position by swinging. The anti-slip assembly 4 includes a plurality of movable blocks 412 and a radial wall 413 distributed circumferentially, and an anti-slip gap 414 is provided between the movable block 412 and the radial wall 413. The tool housing 2 includes a plurality of axial anti-slip blocks 21 distributed circumferentially at an axial end, and the axial size of the axial anti-slip block 21 is adapted to the anti-slip gap 414. When the anti-slip assembly 4 is located in the disassembly position, the projection of the axial anti-slip block 21 on the radial plane is completely staggered from the movable block 412 under the guidance of the guide structure. When the anti-slip assembly 4 is located in the anti-slip position, the projections of the axial anti-slip block 21 and the movable block 412 on the radial plane at least partially overlap.

[0104] In this embodiment, the electric drill can also be used as a screw driver, and only the corresponding drill bit 06 and screw head need to be replaced.

[0105] In this embodiment, the connection structure between the drilling tool head and the body 01 is the quick-release structure of the drilling tool head. Figures 1 to 6 .

[0106] In this embodiment, the structure of the drilling tool head (including the drill chuck, etc.) can refer to the prior art.

[0107] See also Figures 14 to 17 The multifunctional electric tool of the second embodiment of the present invention, when used as a belling machine, comprises:

[0108] The body 01 includes a housing 1 and a driving shaft 50 disposed in the housing 1 and driven by a motor through a reduction transmission assembly;

[0109] The flaring tool head 04 includes a tool housing 2 and a driven shaft 60 disposed in the tool housing 2;

[0110] Wherein, a guide structure is formed between the tool head and the body 01;

[0111] In which, the fuselage 01 also includes a swingable anti-slip assembly 4 provided in the casing 1, and the anti-slip assembly 4 switches between the disassembly position and the working position by swinging. The anti-slip assembly 4 includes a plurality of movable blocks 412 and a radial wall 413 distributed circumferentially, and an anti-slip gap 414 is provided between the movable block 412 and the radial wall 413. The tool housing 2 includes a plurality of axial anti-slip blocks 21 distributed circumferentially at an axial end, and the axial size of the axial anti-slip block 21 is adapted to the anti-slip gap 414. When the anti-slip assembly 4 is located in the disassembly position, the projection of the axial anti-slip block 21 on the radial plane is completely staggered from the movable block 412 under the guidance of the guide structure. When the anti-slip assembly 4 is located in the anti-slip position, the projections of the axial anti-slip block 21 and the movable block 412 on the radial plane at least partially overlap.

[0112] In this embodiment, the connection structure between the flaring tool head 04 and the body 01, that is, the quick-release structure of the flaring tool head 04, is shown in FIG. Figures 1 to 6 .

[0113] In this embodiment, the driven shaft 60 rotates to move the screw and the conical head on the screw to achieve the expansion structure. Figure 9 and prior art.

[0114] In this embodiment, the electric flaring machine also includes a clamping assembly, which includes a clamping seat 81 fixedly connected to the flaring tool head 04, a locking assembly 82 and a tube clamping assembly 83 arranged on the clamping seat 81, and a guide groove 811 radially passing through the clamping seat 81 to guide the tube clamping assembly 83, and a locking groove is provided on the tube clamping assembly 83. The locking assembly 82 includes a positioning locking member that passes through the clamping seat 81 and is screwed into the locking groove.

[0115] In this embodiment, the tube clamp assembly 83 further defines a positioning groove 831, and the clamping base 81 is provided with a positioning assembly 84. This positioning assembly 84 includes a positioning member and an elastic member that forces the positioning member toward the tube clamp assembly 83. During operation, the tube clamp assembly 83 is moved along the rectangular guide groove 811 of the clamping base 81, and the positioning member, under the action of the elastic member 52, enters the positioning groove 831 corresponding to the tube diameter. At this point, the locking assembly 82 is operated to clamp the tube clamp assembly 83, and the expansion of the fuselage 01 can be performed.

[0116] Compared with the electric belling machine in the first embodiment, the electric belling machine in this embodiment can adapt to various pipe diameters using the same pipe clamping assembly 83 without having to replace the chuck assembly 05 as in the first embodiment.

[0117] The embodiment of the present invention also claims protection for the quick-release structure of the tool head and the body 01, and the quick-release structure is as described above.

[0118] The embodiment of the present utility model also requests protection for the fuselage 01, and the structure of the fuselage 01 is as described above.

[0119] The embodiment of the present invention also claims protection for a tool head, which is as described above.

[0120] The embodiment of the present utility model also seeks to protect an electric tube expander, the structure of which is as described above.

[0121] The utility model embodiment also claims protection for an electric belling machine, the structure of the electric belling machine is as described above

[0122] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A tool head quick-disassembly structure for quick disassembly and assembly between the tool head and the body (01), characterized by: The tool head quick-release structure comprises: The body (01) comprises a housing (1), a driving shaft (50) arranged in the housing (1) and driven by a motor through a reduction transmission assembly; A tool head comprises a tool housing (2) and a driven shaft (60) disposed in the tool housing (2); Wherein, a guide structure is formed between the tool head and the machine body (01); The machine body (01) further comprises a swingable anti-slip assembly (4) provided in the housing (1), wherein the anti-slip assembly (4) switches between a disassembly position and a working position by swinging, the anti-slip assembly (4) comprises a movable block (412), and the movable block (412) has an anti-slip gap (414) on a side away from the tool head, and the tool housing (2) comprises an axial anti-slip block (21) located at an axial end, and when the anti-slip assembly (4) is located at the disassembly position, under the guidance of the guide structure, the projection of the axial anti-slip block (21) on the radial plane is completely staggered with the movable block (412), and when the anti-slip assembly (4) is located at the anti-slip position, the projections of the axial anti-slip block (21) and the movable block (412) on the radial plane at least partially overlap.

2. The tool head quick-release structure according to claim 1, characterized in that: The anti-slipping component (4) comprises a linked anti-slipping ring (41) and an operating member (42); the movable block (412) is formed on the radial inner side of the anti-slipping ring (41); a swinging groove (14) is provided on the housing (1); and the operating member (42) forms an operating portion (423) protruding from the swinging groove (14).

3. The tool head quick-release structure according to claim 2, characterized in that: The anti-slip ring (41) comprises an annular portion (411), the radial outer side of the annular portion (411) extends radially outward to form a connecting block (415), the radial inner side of the operating member (42) extends radially inward to form a U-shaped block (422), and the connecting block (415) is located in the U-shaped block (422) and is linked; and / or There are multiple movable blocks (412) and they are evenly distributed around the circumference, and there are multiple axial anti-slip blocks (21) and they are evenly distributed around the circumference; and / or The anti-slip ring (41) includes a radial wall (413), and the anti-slip gap (414) is formed between the movable block (412) and the radial wall (413).

4. The tool head quick-release structure according to claim 2, characterized in that: The radial inner side of the operating member (42) extends to form an anti-sway rib (424), and a plurality of circumferentially distributed fixed ribs extend from the swing groove (14) of the housing (1), and the gaps between the fixed ribs form an anti-sway groove adapted to the anti-sway rib (424); and / or The swing groove (14) comprises a first arc-shaped groove on the inner side and a second arc-shaped groove on the outer side which are connected to each other. The operating member (42) has an arc-shaped portion (421). The curvature of the first arc-shaped groove is greater than the curvature of the arc-shaped portion (421). Clamping blocks (425) are formed at both ends of the arc-shaped portion (421). A clamping portion cooperating with the clamping block (425) is formed in the middle of the first arc-shaped groove of the swing groove (14).

5. The tool head quick-release structure according to claim 1, characterized in that: The end of the body (01) is formed with an open groove (12) extending radially therethrough, and the tool head is formed with a T-shaped portion (23) adapted to the open groove (12). The radial outer end of the T-shaped portion (23) is larger and the inner end is smaller. The open groove (12) and the T-shaped portion (23) form the guide structure.

6. The tool head quick-release structure according to claim 5, characterized in that: The T-shaped portion (23) is located at the radial lower end of the tool head; the axial end of the body (01) extends toward the tool head to form a protruding guide protrusion (11), and the opening groove (12) is provided on the guide protrusion (11).

7. The tool head quick-release structure according to claim 1, characterized in that: The axial end of the body (01) extends to form a plurality of anti-rotation grooves (13) distributed circumferentially, and the axial end of the tool head extends to form a plurality of anti-rotation blocks (22) distributed circumferentially, and the anti-rotation blocks (22) cooperate with the anti-rotation grooves (13).

8. The tool head quick-release structure according to any one of claims 1 to 7, characterized in that: The machine body (01) further comprises a transmission disc (51) arranged on the driving shaft (50), wherein the transmission disc (51) rotates with the driving shaft (50) and can move axially relative to the driving shaft (50), and an elastic member (52) acts on the transmission disc (51) to cause it to move toward the tool head.

9. The tool head quick-release structure according to claim 8, characterized in that: The radial outer end of the transmission disc (51) forms a circumferential transmission block, and the driven shaft (60) has a hollow portion, in which a transmission groove adapted to the transmission block is formed; a limit pin (53) is provided on the driving shaft (50), and the transmission disc (51) is located between the limit pin (53) and the elastic member (52).

10. Electric tube expander, characterized by: The invention comprises a body (01) and a tube expansion tool head (02), wherein the body (01) and the tube expansion tool head (02) adopt a tool head quick-disassembly structure as claimed in any one of claims 1 to 9.

11. The electric tube expander according to claim 10, wherein the tube expanding tool head (02) includes a force transmission member (61) anti-rotationally connected to the driven shaft (60), and the force transmission member (61) has a force transmission surface (611) with a gradually changing axial distance from the driven shaft (60), and the tube expanding tool head (02) further includes a plunger (3), and the force transmission surface (611) of the force transmission member (61) abuts against the plunger (3).

12. The electric tube expander according to claim 11, wherein an axial force bearing (63) is provided between the force transmission member (61) and the tool housing (2), and a radial force bearing (64) is provided outside the force transmission member (61).

13. The electric tube expander according to claim 12, characterized in that: The tool housing (2) of the tube expansion tool head (02) has a force-bearing end wall. The tube expansion tool head (02) also includes a Z-shaped force-bearing member (62) located outside the force transmission member (61). The force-bearing member (62) abuts against the force-bearing end wall. The force transmission member (61) has a plurality of step portions. The axial force bearing (63) is located on one of the step portions. The radial force bearing (64) is located on one of the step portions. A radial gap is provided between the force transmission member (61), the axial force bearing (63) and the force transmission member (62).

14. Electric expanding machine, characterized by: It comprises a body (01) and a flaring tool head (04), wherein the body (01) and the tube expanding tool head (02) adopt a tool head quick-disassembly structure as claimed in any one of claims 1 to 9.

15. The electric belling machine according to claim 14, characterized in that: The electric flaring machine also includes a chuck assembly (05) detachably connected to the flaring tool head (04), the chuck assembly (05) including a connector (72), the connector (72) forming a guide portion near one end of the flaring tool head (04), the guide portion forming an anti-slip groove (721) on the radial outer side, the flaring tool head (04) including a chuck seat (71) near one end of the connector (72), the chuck seat (71) having a plurality of circumferentially distributed steel ball holes, radially movable steel balls (73) embedded in the steel ball holes, the inner end diameter of the steel ball holes being smaller than the steel balls (73), an axial movable part (74) being provided on the outside of the chuck seat (71), and a compression spring (75) acting on the axial movable part (74) to move it toward the chuck assembly (05).

16. The electric belling machine according to claim 15, characterized in that: The connecting head (72) forms a semicircular portion at one end away from the flaring tool head (04), and a first clamping semicircle (76) is fixedly connected to the semicircular portion. The chuck assembly (05) also includes a semicircular member (77) pivotally connected to the connecting head (72), and a second clamping semicircle (78) is fixedly connected to the semicircular member (77). The chuck assembly (05) also includes a locking assembly (79) rotatably connected to the semicircular portion. The locking assembly (79) includes a connecting plate (791) rotatably connected to the semicircular portion and a locking member (792) rotatably connected to the rotating plate. The locking member (792) has a control portion and a locking portion. A swingable blocking plate (70) is also provided between the semicircular portion and the flaring tool head (04).

17. The electric belling machine according to claim 14, characterized in that: The electric belling machine also includes a clamping assembly, which includes a clamping seat (81) fixedly connected to the belling tool head (04), a locking assembly (82) and a tube clamping assembly (83) arranged on the clamping seat (81), a guide groove (811) radially penetrating the clamping seat (81) for guiding the tube clamping assembly (83), a locking groove is provided on the tube clamping assembly (83), and the locking assembly (82) includes a positioning locking member passing through the clamping seat (81) and screwed into the locking groove.

18. The electric belling machine according to claim 17, characterized in that: A positioning groove (831) is also provided on the clamping assembly (83), and a positioning assembly (84) is provided on the clamping seat (81). The positioning assembly (84) includes a positioning member and an elastic member that generates a force for the positioning member to move toward the clamping assembly (83).

19. A multifunctional electric tool comprising a body (01) and a plurality of tool heads, characterized in that: The machine body (01) and the plurality of tool heads adopt the tool head quick-release structure described in any one of claims 1 to 9.

20. The multifunctional electric tool according to claim 19, wherein: The plurality of tool heads include at least two of a tube expanding tool head (02), a flaring tool head (04) and a drilling tool head.

21. An electric tool body (01), characterized in that: The electric tool body (01) is the body (01) described in any one of claims 1 to 20.

22. A power tool head, characterized in that: The electric tool head is the tool head according to any one of claims 1 to 20.

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