CN114033782B - Combined self-tapping screw with cutting fluid - Google Patents
Combined self-tapping screw with cutting fluid Download PDFInfo
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- CN114033782B CN114033782B CN202111514481.4A CN202111514481A CN114033782B CN 114033782 B CN114033782 B CN 114033782B CN 202111514481 A CN202111514481 A CN 202111514481A CN 114033782 B CN114033782 B CN 114033782B
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 110
- 239000002173 cutting fluid Substances 0.000 title claims abstract description 41
- 239000007788 liquid Substances 0.000 claims abstract description 248
- 238000003860 storage Methods 0.000 claims abstract description 109
- 238000005553 drilling Methods 0.000 claims abstract description 95
- 230000005540 biological transmission Effects 0.000 claims abstract description 91
- 238000005520 cutting process Methods 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 60
- 239000010959 steel Substances 0.000 claims description 60
- 238000002347 injection Methods 0.000 claims description 51
- 239000007924 injection Substances 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 22
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
- F16B25/103—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws by means of a drilling screw-point, i.e. with a cutting and material removing action
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/06—Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure or fretting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a combined self-tapping screw with cutting fluid, and belongs to the field of self-tapping screws. The combined self-tapping screw comprises a transmission rod, a drilling head, a liquid storage cylinder sleeve and a one-way liquid outlet assembly, wherein the liquid storage cylinder sleeve is sleeved outside the rod body of the transmission rod, a closed liquid storage cavity is formed between the liquid storage cylinder sleeve and the transmission rod in a surrounding mode, and cutting liquid is contained in the liquid storage cavity and a flow channel; when the cutting fluid is used, the screwing cap head is rotated to drive the drilling head to drill into the connected material, the connected material is utilized to extrude the liquid storage cylinder sleeve to compress the liquid storage cavity space, the cutting fluid is extruded into the cavity of the drilling head through the one-way liquid outlet assembly, and the cutting fluid sequentially passes through the communicating hole and the liquid outlet hole to flow to the external cutting surface of the drilling head. The self-tapping screw is lubricated and cooled through a reasonable combined structure, so that the self-tapping screw is easier to connect and is firm and stable to connect; and the self-tapping screw with the combined structure is simple and convenient to process and manufacture, and has lower use cost when being used as a special screw for self drilling and self tapping.
Description
Technical Field
The invention relates to a self-tapping screw, in particular to a combined self-tapping screw with cutting fluid.
Background
Self-tapping screws are quick-install fasteners that are used for thin metal plates or for joining softer metal and non-metal parts. With the expansion of application scenes and the improvement of performance requirements, the self-tapping screws gradually evolve into types of thread forming self-tapping screws, thread cutting self-tapping screws, thread rolling self-tapping screws, self-drilling self-tapping screws and the like. It can also be seen from the evolution that self-tapping screws are gradually being developed from thread forming to drilling connection integration, and the use and function are gradually expanding to thicker sections and harder materials.
In any of the above tapping screws, since the material to be connected needs to be pressed or cut during operation, the frictional resistance during screwing is large, and the greater the thickness and the higher the hardness of the material to be connected, the greater the tapping frictional resistance of the tapping screw is, and the high-temperature heat generation of the tapping screw is often accompanied during tapping. The heat generated between the tapping screw and the connected material not only causes the front part of the tapping screw to be worn and aggravated, leading to the deformation and damage of the tapping screw, but also causes the local deformation of the connected material, further leading to poor connection stability and easy loosening.
The search shows that, aiming at the above problems of the self-locking screw, related solutions are disclosed in the prior art, such as a representative "cooling type self-tapping screw" disclosed in chinese patent No. ZL201420825487.2 and a representative "self-cooling type self-tapping screw" disclosed in chinese patent No. zl201420827426.X, in which all the self-tapping screws are provided with an accommodating cavity or an accommodating groove for accommodating a cooling medium, and the cooling medium flows out by using pressure or temperature change when the self-tapping screw works, so as to reduce the working temperature of the self-tapping screw. However, the integral self-tapping screw is difficult to manufacture, a screw main body needs to be machined firstly, then an internal cavity is cut and machined by the screw main body, corresponding parts are installed in the cavity and then welded and combined into a whole, the machining process is complex and tedious, the machining precision requirement of the integral self-tapping screw is difficult to guarantee, the practical application difficulty is high, and the practicability is poor.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of the existing tapping screw and provides a combined tapping screw with cutting fluid, and by adopting the technical scheme of the invention, the tapping screw is integrated with a liquid storage cylinder sleeve internally provided with the cutting fluid through a reasonable combined structure, and when the tapping screw taps a connected material, the liquid cavity space of the liquid storage cylinder sleeve is compressed to convey the cutting fluid to the external cutting surface of a drilling head, so that the lubrication and cooling of the tapping screw are realized, the connection of the tapping screw is easier, and the connection is firm and stable; and the self-tapping screw with the combined structure is simple and convenient to process and manufacture, and has lower use cost when being used as a special screw for self-drilling and self-tapping.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a combined self-tapping screw with cutting fluid, which comprises a transmission rod, a drilling head, a liquid storage cylinder sleeve and a one-way liquid outlet assembly, wherein one end of the transmission rod is provided with a screwing cap head, the other end of the transmission rod is axially and fixedly connected with the drilling head, the liquid storage cylinder sleeve is sleeved outside a rod body of the transmission rod, two ends of the liquid storage cylinder sleeve are respectively in sealing fit with the outer side wall of the rod body of the transmission rod, a closed liquid storage cavity is defined between the liquid storage cylinder sleeve and the transmission rod, a flow channel is arranged in the transmission rod, a through hole for communicating the flow channel with the liquid storage cavity is formed in the transmission rod, the liquid storage cavity and the flow channel are internally provided with the cutting fluid, and the outer diameter of the liquid storage cylinder sleeve is larger than the outer diameter of the drilling head; a cavity is arranged in the drilling head, a one-way liquid outlet assembly is arranged between the cavity and the flow channel, a liquid outlet hole is arranged on the conical tip of the drilling head, and the liquid outlet hole is communicated with the cavity through a communicating hole;
when the connecting device is used, the screwing cap head is rotated to drive the drilling head to drill into a connected material, the connected material is utilized to extrude the liquid storage cylinder sleeve to compress the liquid storage cavity space along with the drilling head, cutting liquid is extruded into the cavity of the drilling head through the one-way liquid outlet assembly, and the cutting liquid flows to the outer cutting surface of the drilling head through the communicating hole and the liquid outlet hole in sequence.
Furthermore, a cutting edge is arranged on the cone tip of the drilling head and the side wall of the drilling head, and a self-tapping thread is arranged at the tail of the drilling head.
Furthermore, the one-way liquid outlet assembly comprises a liquid outlet steel ball and a liquid outlet steel ball spring, the liquid outlet steel ball is arranged at a liquid outlet at the front end of the flow channel, the diameter of the liquid outlet steel ball is larger than the aperture of a liquid outlet at the front end of the flow channel, the liquid outlet steel ball spring is positioned in the cavity of the drilling head, one end of the liquid outlet steel ball spring abuts against the liquid outlet steel ball, and the other end of the liquid outlet steel ball spring abuts against the front end of the cavity of the drilling head.
Furthermore, the drilling head is directly in threaded connection with the front end of the transmission rod or is in indirect threaded connection through a connecting sleeve;
when the direct threaded connection is adopted, the front end of the flow channel of the transmission rod is provided with a cambered surface matched with the liquid outlet steel ball, and after the transmission rod is connected with the drilling head, the outer diameter of the front end of the transmission rod is equal to or smaller than the outer diameter of the rear end of the drilling head;
when the connecting sleeve is in indirect threaded connection through the connecting sleeve, a valve port matched with the liquid outlet steel ball is arranged in the center of the connecting sleeve, and after the connecting sleeve is connected with the drilling head, the outer diameter of the connecting sleeve is equal to the outer diameter of the rear end of the drilling head.
Furthermore, the liquid storage cylinder sleeve adopts a collapsing type structure or a pushing type structure;
when the collapse type structure is adopted, sealing ring clamping grooves are respectively formed in two ends of the liquid storage cylinder sleeve, a first sealing ring and a second sealing ring are respectively arranged in the sealing ring clamping grooves in the two ends of the liquid storage cylinder sleeve, a collapse type thin wall is arranged in the middle of the liquid storage cylinder sleeve, and a limiting structure used for limiting the liquid storage cylinder sleeve is arranged at the tail of the transmission rod; when in use, the connected material is used for extruding the liquid storage cylinder sleeve to make the collapsing thin wall compress and deform to reduce the space of the liquid storage cavity;
when a pushing structure is adopted, a sealing ring clamping groove is formed in the front end of the liquid storage cylinder sleeve, a second sealing ring in sliding fit with the outer side wall of the transmission rod is arranged in the sealing ring clamping groove of the liquid storage cylinder sleeve, and the inner side wall of the rear end of the liquid storage cylinder sleeve is in sliding fit with a first sealing ring arranged on the transmission rod; when the liquid storage cylinder sleeve is used, the liquid storage cylinder sleeve is extruded by the connected material and slides on the transmission rod to reduce the space of the liquid storage cavity.
Furthermore, the screwing cap head is integrally formed at the tail part of the transmission rod or is assembled at the tail part of the transmission rod in a split manner by adopting threaded connection, and the tail part of the flow passage of the transmission rod is closed.
Furthermore, the screwing cap head is assembled at the tail part of the transmission rod in a split manner by adopting threaded connection, a liquid injection hole communicated with a flow passage of the transmission rod is further formed in the middle of the screwing cap head, and a one-way liquid injection assembly is further arranged at the liquid injection hole.
Furthermore, the one-way liquid injection assembly comprises a liquid injection steel ball and a liquid injection steel ball spring, the liquid injection steel ball is arranged at the position of the liquid injection hole, the diameter of the liquid injection steel ball is larger than the diameter of the liquid injection hole, the liquid injection steel ball spring is positioned in a concave cavity at the tail part of the transmission rod, one end of the liquid injection steel ball spring is abutted against the liquid injection steel ball, and the other end of the liquid injection steel ball spring is abutted against the front end of the concave cavity.
Furthermore, the tail part of the transmission rod is also provided with a limiting step for abutting against the end face of the screwing cap head.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) The invention relates to a combined self-tapping screw with cutting fluid, which comprises a transmission rod, a drilling head, a liquid storage cylinder sleeve and a one-way liquid outlet assembly, wherein one end of the transmission rod is provided with a screwing cap head, the other end of the transmission rod is axially and fixedly connected with the drilling head, the liquid storage cylinder sleeve is sleeved outside a rod body of the transmission rod, two ends of the liquid storage cylinder sleeve are respectively in sealing fit with the outer side wall of the rod body of the transmission rod, a closed liquid storage cavity is defined between the liquid storage cylinder sleeve and the transmission rod, the cutting fluid is contained in the liquid storage cavity and a flow channel, when the screw cap head is rotated to drive the drilling head to drill a connected material, and along with the drilling of the drilling head, the liquid storage cylinder sleeve is extruded by the connected material to compress the space of the liquid storage cavity, so that the cutting fluid is extruded into a cavity of the drilling head through the one-way liquid outlet assembly and flows to the outer cutting surface of the drilling head through a communication hole and a liquid outlet hole in sequence; through a reasonable combined structure, a liquid storage cylinder sleeve with cutting fluid inside is integrated on the self-tapping screw, and when the self-tapping screw taps a connected material, the liquid cavity space of the liquid storage cylinder sleeve is compressed to convey the cutting fluid to the external cutting surface of the drilling head, so that the self-tapping screw is lubricated and cooled, the self-tapping screw is connected more easily, and the connection is firm and stable; and the self-tapping screw with the combined structure is simple and convenient to process and manufacture, and has lower use cost when being used as a special screw for self-drilling and self-tapping.
(2) According to the combined self-tapping screw with the cutting fluid, the cutting edges are arranged on the cone tip of the drilling head and the side wall of the drilling head, the self-tapping threads are arranged at the tail of the drilling head, the cone tip of the drilling head is similar to a drill bit structure, the self-drilling and self-tapping integrated function can be realized, the components can be quickly connected through the self-tapping screw without pre-drilling, and the use is more convenient;
(3) According to the combined self-tapping screw with the cutting fluid, the one-way liquid outlet assembly is adopted, the cutting fluid in the self-tapping screw can be prevented from leaking, and the spring steel ball structure is adopted, so that the structure is simple, and the mounting is convenient;
(4) According to the combined self-tapping screw with the cutting fluid, the drilling head and the front end of the transmission rod can be directly in threaded connection or in indirect threaded connection through the connecting sleeve, and the screw connection is adopted, so that the assembly is simple and convenient; in addition, after the drill head is connected, the transmission rod or the connecting sleeve can be used as the extension of the drill head according to the requirement, so that the length of the self-tapping thread can be increased, and the connection firmness is improved;
(5) According to the combined self-tapping screw with the cutting fluid, the liquid storage cylinder sleeve is of a collapsing type structure or a pushing type structure, the collapsing type structure enables the collapsing type thin wall to be compressed and deformed by means of extrusion of the liquid storage cylinder sleeve to reduce the space of the liquid storage cavity, the pushing type structure enables the liquid storage cylinder sleeve to slide on the transmission rod to reduce the space of the liquid storage cavity, the cutting fluid can be well conveyed to a cutting surface in the tapping process of the self-tapping screw, the whole process is of a mechanical trigger structure, the self-tapping screw is not influenced by other external environmental factors, and the use is more stable and reliable;
(6) According to the combined self-tapping screw with the cutting fluid, the screwing cap head is assembled at the tail of the transmission rod in a split manner through threaded connection, the middle of the screwing cap head is also provided with the fluid injection hole communicated with the flow channel of the transmission rod, and the one-way fluid injection assembly is further arranged at the fluid injection hole.
Drawings
Fig. 1 is a schematic perspective view of a self-cutting fluid-carrying self-tapping screw according to embodiment 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a self-cutting tapping screw of the combination type according to embodiment 1 of the present invention;
FIG. 3 is a view showing a state in which a combination type tapping screw with a cutting fluid according to example 1 of the present invention is driven into a material to be joined;
FIG. 4 is a schematic structural view of a collapsible cylinder liner according to embodiment 1 of the present invention;
FIG. 5 is a perspective view of a self-cutting tapping screw of embodiment 2 of the present invention;
fig. 6 is a schematic cross-sectional view of a combined tapping screw with a cutting fluid according to embodiment 2 of the present invention.
The reference numerals in the schematic drawings illustrate:
1. a transmission rod; 1-1, screwing a cap head; 1-1a, a liquid injection hole; 1-2, a flow channel; 1-3, through holes; 1-4, a limit step; 2. connecting sleeves; 2-1, valve port; 3. a drilling head; 3-1, conical tip; 3-2, a cutting edge; 3-3, liquid outlet holes; 3-4, a cavity; 3-5, a communicating hole; 4. a liquid storage cylinder sleeve; 4-1, a liquid storage cavity; 5. a first seal ring; 6. a second seal ring; 7. discharging the steel balls; 8. a liquid outlet steel ball spring; 9. injecting steel balls; 10. and injecting a steel ball spring.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
[ example 1]
Referring to fig. 1, 2 and 3, a combined self-tapping screw with cutting fluid of this embodiment includes a transmission rod 1, a drilling head 3, a liquid storage cylinder sleeve 4 and a one-way liquid outlet assembly, wherein one end of the transmission rod 1 is provided with a screwing cap head 1-1, the other end of the transmission rod is axially and fixedly connected with the drilling head 3, the liquid storage cylinder sleeve 4 is sleeved outside a rod body of the transmission rod 1, two ends of the liquid storage cylinder sleeve 4 are respectively in sealing fit with an outer side wall of the rod body of the transmission rod 1, a sealed liquid storage cavity 4-1 is defined between the liquid storage cylinder sleeve 4 and the transmission rod 1, a flow channel 1-2 is arranged in the transmission rod 1, the transmission rod 1 is provided with one or more through holes 1-3 communicating the flow channel 1-2 with the liquid storage cavity 4-1, the liquid storage cavity 4-1 and the flow channel 1-2 are provided with cutting fluid, and an outer diameter of the liquid storage cylinder sleeve 4 is larger than an outer diameter of the drilling head 3; a cavity 3-4 is arranged in the drilling head 3, a one-way liquid outlet assembly is arranged between the cavity 3-4 and the flow channel 1-2, a liquid outlet hole 3-3 is arranged on the cone tip 3-1 of the drilling head 3, and the liquid outlet hole 3-3 is communicated with the cavity 3-4 through a communicating hole 3-5.
The screwing cap head 1-1 is provided with a cap head structure, such as an outer hexagonal cap head or an inner hexagonal cap head, which is used for being matched with a tool. When the self-tapping screw is used, the screwing cap head 1-1 is rotated to drive the drilling head 3 to drill into a connected material, the front end of the liquid storage cylinder sleeve 4 is abutted to the end face of the connected material along with the drilling head 3, the liquid storage cylinder sleeve 4 is extruded by the connected material to compress the space of the liquid storage cavity 4-1, cutting liquid is extruded into the cavity 3-4 of the drilling head 3 through the one-way liquid outlet assembly and flows to the outer cutting face of the drilling head 3 through the communicating holes 3-5 and the liquid outlet holes 3-3 in sequence, the lubrication and cooling of the self-tapping screw are realized, the connection of the self-tapping screw is easier, and the connection is firm and stable.
As shown in fig. 1 to 3, in the present embodiment, the cutting edge 3-2 is disposed on the cone tip 3-1 of the drill head 3 and the side wall of the drill head 3, and the tail of the drill head 3 is provided with a self-tapping thread (not shown). The structure of the cone tip 3-1 of the drill head 3 is similar to that of the existing drill head, and the structure form of the cone tip 3-1 is only illustrated in the drawing for simplicity and is not a specific limitation on the drill head 3. By adopting the design of the drilling head 3, the self-drilling and self-tapping integrated function can be realized, the components can be quickly connected through the self-tapping screw without pre-drilling, and the use is more convenient. As shown in fig. 2 and fig. 3, the one-way liquid outlet assembly comprises a liquid outlet steel ball 7 and a liquid outlet steel ball spring 8, the liquid outlet steel ball 7 is arranged at a liquid outlet at the front end of the flow channel 1-2, the diameter of the liquid outlet steel ball 7 is larger than the aperture of the liquid outlet at the front end of the flow channel 1-2, the liquid outlet steel ball spring 8 is positioned in the cavity 3-4 of the drilling head 3, one end of the liquid outlet steel ball spring 8 abuts against the liquid outlet steel ball 7, and the other end abuts against the front end of the cavity 3-4 of the drilling head 3. The liquid outlet steel ball 7 and the liquid outlet steel ball spring 8 form a one-way valve structure, cutting fluid in the flow channel 1-2 can overcome the elasticity of the liquid outlet steel ball spring 8 after being pressed to push the liquid outlet steel ball 7 open, and then the cutting fluid is extruded into the front end of the drilling head 3, the structure is simple, the installation is convenient, and the leakage of the cutting fluid in the self-tapping screw can be prevented.
The drilling head 3 and the front end of the transmission rod 1 can be directly in threaded connection or indirectly in threaded connection through the connecting sleeve 2. In the present embodiment in particular, an indirect screw connection via the connecting sleeve 2 is preferred. When the connecting sleeve 2 is in indirect threaded connection, the center of the connecting sleeve 2 is provided with a valve port 2-1 matched with the liquid outlet steel ball 7, and after the connecting sleeve 2 is connected with the drilling head 3, the outer diameter of the connecting sleeve 2 is equal to the outer diameter of the rear end of the drilling head 3. The connecting sleeve 2 can be used as an extension of the drilling head 3, and self-tapping threads can be arranged on the outer side of the connecting sleeve 2, so that the connection firmness is improved. Specifically, as shown in fig. 2, the connecting sleeve 2 has an H-shaped axial cross section, two ends of the connecting sleeve are provided with internal threads, the front end of the transmission rod 1 is provided with external threads and is in threaded connection with one end of the connecting sleeve 2, and the tail of the drilling head 3 is provided with external threads and is in threaded connection with the other end of the connecting sleeve 2.
The liquid storage cylinder sleeve 4 can adopt a collapsing type structure or a pushing type structure. As shown in fig. 1 to 4, the liquid storage cylinder sleeve 4 in this embodiment is of a collapsing structure, two ends of the liquid storage cylinder sleeve 4 are respectively provided with a seal ring clamping groove, a first seal ring 5 and a second seal ring 6 (see fig. 4) are respectively arranged in the seal ring clamping grooves at the two ends of the liquid storage cylinder sleeve 4, the middle of the liquid storage cylinder sleeve 4 is provided with a collapsing thin wall, and the tail of the transmission rod 1 is provided with a limiting structure for limiting the liquid storage cylinder sleeve 4, wherein the limiting structure can be a front end surface of a screwing cap head 1-1; when in use, the connected material is used for extruding the liquid storage cylinder sleeve 4 to ensure that the collapse type thin wall is compressed and deformed to reduce the space of the liquid storage cavity 4-1; the state of the liquid storage cylinder sleeve 4 after being extruded is shown in figure 3, along with the collapse of the liquid storage cylinder sleeve 4, cutting fluid in a liquid storage cavity 4-1 is extruded into a flow channel 1-2 through a through hole 1-3, the cutting fluid in the flow channel 1-2 pushes away a one-way liquid outlet assembly and then enters a cavity 3-4 of a drilling head 3, and then the cutting fluid in the cavity 3-4 flows out from a liquid outlet hole 3-3 to lubricate and cool a cutting surface of the drilling head 3.
The screwing cap head 1-1 can be integrally formed at the tail part of the transmission rod 1 or assembled at the tail part of the transmission rod 1 in a split manner by adopting threaded connection, and the tail part of the flow passage 1-2 of the transmission rod 1 is closed. As shown in fig. 2, in the embodiment, the screw cap head 1-1 is integrally formed at the tail of the transmission rod 1, so that the structure strength is high and the manufacturing is convenient.
[ example 2]
Referring to fig. 5 and 6, the basic structure and operation principle of the self-tapping screw with cutting fluid of this embodiment are the same as those of embodiment 1, except that:
in this embodiment, the drilling head 3 is directly screwed to the front end of the transmission rod 1, at this time, the front end port of the flow passage 1-2 of the transmission rod 1 serves as a valve port of the check valve, the front end of the flow passage 1-2 of the transmission rod 1 is provided with a cambered surface matched with the liquid outlet steel ball 7, and after the transmission rod 1 is connected to the drilling head 3, the outer diameter of the front end of the transmission rod 1 is equal to or smaller than the outer diameter of the rear end of the drilling head 3. In order to improve the connection stability of the tapping screw, it is preferable that the outer diameter of the front end of the driver rod 1 is equal to the outer diameter of the rear end of the drill bit 3, and the tapping screw is provided at the front end of the driver rod 1, so that the tapping screw section can be extended and the connection stability of the tapping screw can be improved.
In the present embodiment, the cylinder liner 4 is of a push-squeeze structure. As shown in fig. 6, a seal ring slot is arranged at the front end of the liquid storage cylinder sleeve 4, a second seal ring 6 in sliding fit with the outer side wall of the transmission rod 1 is arranged in the seal ring slot of the liquid storage cylinder sleeve 4, and the inner side wall of the rear end of the liquid storage cylinder sleeve 4 is in sliding fit with a first seal ring 5 arranged on the transmission rod 1; when the self-tapping screw is used, the liquid storage cylinder sleeve 4 is extruded by the connected material, the liquid storage cylinder sleeve 4 slides on the transmission rod 1 to reduce the space of the liquid storage cavity 4-1, the end face of the connected material pushes the front end face of the liquid storage cylinder sleeve 4 along with the tapping of the self-tapping screw, the liquid storage cylinder sleeve 4 slides axially relative to the transmission rod 1, the liquid storage cavity 4-1 in the liquid storage cylinder sleeve is compressed along with the movement of the second sealing ring 6 towards the first sealing ring 5, the cutting liquid in the liquid storage cavity 4-1 is extruded into the flow channel 1-2 through the through hole 1-3, the cutting liquid in the flow channel 1-2 is further pushed away from the one-way liquid outlet assembly and then enters the cavity 3-4 of the drilling head 3, and then the cutting liquid in the cavity 3-4 flows out from the liquid outlet hole 3-3 to lubricate and cool the cutting surface of the drilling head 3.
As shown in fig. 6, in the present embodiment, the screw cap head 1-1 is assembled at the tail of the transmission rod 1 by a screw connection split body, and the tail of the transmission rod 1 is further provided with a limiting step 1-4 for abutting against the end surface of the screw cap head 1-1, so that the screw cap head 1-1 is connected with the transmission rod 1 more firmly, and the transmission of the rotation torque of tapping screw attack is facilitated. The middle part of the screwing cap head 1-1 is also provided with a liquid injection hole 1-1a communicated with the flow passage 1-2 of the transmission rod 1, and the liquid injection hole 1-1a is also provided with a one-way liquid injection assembly. By utilizing the design of the liquid injection hole 1-1a and the unidirectional liquid injection assembly, the cutting liquid in the self-tapping screw can be conveniently injected, meanwhile, the external connection of the cutting liquid can be realized, more cutting liquid can be applied when the self-tapping screw is used, and the self-tapping screw can be conveniently, quickly and stably drilled and connected and fixed. Specifically, the one-way liquid injection assembly comprises a liquid injection steel ball 9 and a liquid injection steel ball spring 10, the liquid injection steel ball 9 is arranged at the position of a liquid injection hole 1-1a, the diameter of the liquid injection steel ball 9 is larger than the aperture of the liquid injection hole 1-1a, the liquid injection steel ball spring 10 is positioned in a concave cavity at the tail part of the transmission rod 1, one end of the liquid injection steel ball spring 10 abuts against the liquid injection steel ball 9, and the other end of the liquid injection steel ball spring abuts against the front end of the concave cavity. The unidirectional liquid injection assembly can ensure that the cutting liquid in the flow channel 1-2 cannot flow out from the liquid injection hole 1-1a and can only be opened in a unidirectional mode from the liquid injection hole 1-1a to the direction of the flow channel 1-2, so that the cutting liquid can be conveniently injected into the flow channel 1-2 and the liquid storage cavity 4-1 of the transmission rod 1 when the self-tapping screw is manufactured, a cutting liquid supply device can be externally connected to the screwing cap head 1-1, and more cutting liquid can be applied to the drilling head 3 when the self-tapping screw is used.
It should be noted that, where the threaded connection is adopted, the thread turning direction is the same as the tapping turning direction of the tapping screw, so that when the tapping screw taps into the material to be connected, the threaded connection can be firmer and more reliable, and the threaded connection is prevented from being loosened and separated.
According to the combined self-tapping screw with the cutting fluid, the liquid storage cylinder sleeve with the cutting fluid inside is integrated on the self-tapping screw through a reasonable combined structure, when the self-tapping screw taps a connected material, the liquid cavity space of the liquid storage cylinder sleeve is compressed to convey the cutting fluid to the external cutting surface of a drilling head, so that the self-tapping screw is lubricated and cooled, the self-tapping screw is connected more easily, and the connection is firm and stable; and the self-tapping screw with the combined structure is simple and convenient to process and manufacture, and has lower use cost when being used as a special screw for self-drilling and self-tapping.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, without departing from the spirit of the present invention, a person of ordinary skill in the art should also understand that the present invention shall not be limited to the embodiments and the similar structural modes of the present invention.
Claims (8)
1. The utility model provides a from combination formula self-tapping screw of taking cutting fluid which characterized in that: the drilling machine comprises a transmission rod (1), a drilling head (3), a liquid storage cylinder sleeve (4) and a one-way liquid outlet assembly, wherein a screwing cap head (1-1) is arranged at one end of the transmission rod (1), the other end of the transmission rod is axially and fixedly connected with the drilling head (3), the liquid storage cylinder sleeve (4) is sleeved outside a rod body of the transmission rod (1), two ends of the liquid storage cylinder sleeve (4) are respectively in sealing fit with the outer side wall of the rod body of the transmission rod (1), a closed liquid storage cavity (4-1) is defined between the liquid storage cylinder sleeve (4) and the transmission rod (1), a flow channel (1-2) is arranged in the transmission rod (1), a through hole (1-3) for communicating the flow channel (1-2) with the liquid storage cavity (4-1) is formed in the liquid storage cavity (4-1) and the flow channel (1-2), and the outer diameter of the liquid storage cylinder sleeve (4) is larger than that of the drilling head (3); a cavity (3-4) is arranged in the drilling head (3), a one-way liquid outlet assembly is arranged between the cavity (3-4) and the flow channel (1-2), a liquid outlet hole (3-3) is formed in the conical tip (3-1) of the drilling head (3), and the liquid outlet hole (3-3) is communicated with the cavity (3-4) through a communicating hole (3-5);
when the connecting device is used, the screwing cap head (1-1) is rotated to drive the drilling head (3) to drill into a connected material, the connected material is utilized to extrude the liquid storage cylinder sleeve (4) to compress the space of the liquid storage cavity (4-1) along with the drilling head (3) to extrude cutting liquid into the cavity (3-4) of the drilling head (3) through the one-way liquid outlet assembly, and the cutting liquid flows to the external cutting surface of the drilling head (3) through the communicating hole (3-5) and the liquid outlet hole (3-3) in sequence;
the liquid storage cylinder sleeve (4) adopts a collapsing type structure or a pushing type structure;
when a collapsing type structure is adopted, sealing ring clamping grooves are respectively formed in two ends of the liquid storage cylinder sleeve (4), a first sealing ring (5) and a second sealing ring (6) are respectively arranged in the sealing ring clamping grooves in the two ends of the liquid storage cylinder sleeve (4), a collapsing type thin wall is arranged in the middle of the liquid storage cylinder sleeve (4), and a limiting structure used for limiting the liquid storage cylinder sleeve (4) is arranged at the tail of the transmission rod (1); when in use, the connected material is used for extruding the liquid storage cylinder sleeve (4) to cause the collapsing thin wall to compress and deform so as to reduce the space of the liquid storage cavity (4-1);
when a push-extrusion structure is adopted, a sealing ring clamping groove is formed in the front end of the liquid storage cylinder sleeve (4), a second sealing ring (6) in sliding fit with the outer side wall of the transmission rod (1) is arranged in the sealing ring clamping groove of the liquid storage cylinder sleeve (4), and the inner side wall of the rear end of the liquid storage cylinder sleeve (4) is in sliding fit with a first sealing ring (5) arranged on the transmission rod (1); when the liquid storage cylinder sleeve is used, the liquid storage cylinder sleeve (4) is extruded by the connected material, and the liquid storage cylinder sleeve (4) slides on the transmission rod (1) to reduce the space of the liquid storage cavity (4-1).
2. A self-cutting, modular, self-tapping screw as in claim 1, wherein: the side walls of the conical tip (3-1) of the drilling head (3) and the drilling head (3) are provided with cutting edges (3-2), and the tail part of the drilling head (3) is provided with self-tapping threads.
3. A self-cutting, modular, self-tapping screw as in claim 1, wherein: the one-way liquid outlet assembly comprises a liquid outlet steel ball (7) and a liquid outlet steel ball spring (8), the liquid outlet steel ball (7) is arranged at a liquid outlet at the front end of the runner (1-2), the diameter of the liquid outlet steel ball (7) is larger than the aperture of the liquid outlet at the front end of the runner (1-2), the liquid outlet steel ball spring (8) is positioned in a cavity (3-4) of the drilling head (3), one end of the steel ball liquid outlet spring (8) abuts against the liquid outlet steel ball (7), and the other end abuts against the front end of the cavity (3-4) of the drilling head (3).
4. A self-cutting, modular, self-tapping screw as in claim 3, wherein: the drilling head (3) is directly in threaded connection with the front end of the transmission rod (1) or indirectly in threaded connection through a connecting sleeve (2);
when the direct threaded connection is adopted, the front end of the flow channel (1-2) of the transmission rod (1) is provided with a cambered surface matched with the liquid outlet steel ball (7), and after the transmission rod (1) is connected with the drilling head (3), the outer diameter of the front end of the transmission rod (1) is equal to or smaller than the outer diameter of the rear end of the drilling head (3);
when the connecting sleeve (2) is in indirect threaded connection, a valve port (2-1) matched with the liquid outlet steel ball (7) is arranged in the center of the connecting sleeve (2), and after the connecting sleeve (2) is connected with the drilling head (3), the outer diameter of the connecting sleeve (2) is equal to the outer diameter of the rear end of the drilling head (3).
5. A self-cutting, self-tapping screw, according to any one of claims 1 to 4, in combination with a cutting fluid, characterized in that: the screwing cap head (1-1) is integrally formed at the tail of the transmission rod (1) or is assembled at the tail of the transmission rod (1) in a split manner by adopting threaded connection, and the tail of the flow channel (1-2) of the transmission rod (1) is closed.
6. A self-cutting, self-tapping screw, according to any one of claims 1 to 4, in combination with a cutting fluid, characterized in that: the screw cap head (1-1) is assembled at the tail of the transmission rod (1) in a split manner by adopting threaded connection, a liquid injection hole (1-1 a) communicated with a flow channel (1-2) of the transmission rod (1) is further formed in the middle of the screw cap head (1-1), and a one-way liquid injection assembly is further arranged at the position of the liquid injection hole (1-1 a).
7. A self-cutting, modular, self-tapping screw as in claim 6, wherein: the one-way liquid injection assembly comprises a liquid injection steel ball (9) and a liquid injection steel ball spring (10), the liquid injection steel ball (9) is arranged at the position of a liquid injection hole (1-1 a), the diameter of the liquid injection steel ball (9) is larger than the aperture of the liquid injection hole (1-1 a), the liquid injection steel ball spring (10) is positioned in a cavity at the tail part of the transmission rod (1), one end of the liquid injection steel ball spring (10) abuts against the liquid injection steel ball (9), and the other end of the liquid injection steel ball spring abuts against the front end of the cavity.
8. A self-cutting, modular, self-tapping screw as in claim 7, wherein: the tail part of the transmission rod (1) is also provided with a limiting step (1-4) which is used for tightly abutting against the end surface of the screwing cap head (1-1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111514481.4A CN114033782B (en) | 2021-12-13 | 2021-12-13 | Combined self-tapping screw with cutting fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111514481.4A CN114033782B (en) | 2021-12-13 | 2021-12-13 | Combined self-tapping screw with cutting fluid |
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| CN114033782A CN114033782A (en) | 2022-02-11 |
| CN114033782B true CN114033782B (en) | 2023-03-21 |
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| CN213176397U (en) * | 2020-09-27 | 2021-05-11 | 苏州市方成五金紧固件有限公司 | Bolt with lubricating groove |
| CN213981576U (en) * | 2020-11-03 | 2021-08-17 | 永固(嘉兴)五金科技股份有限公司 | Screw with good rust-proof effect |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191409111A (en) * | 1914-04-09 | 1915-01-21 | Marcus Henshall | Improvements in connection with Lubricating Devices. |
| CN203979064U (en) * | 2014-08-04 | 2014-12-03 | 温州市胜隆标准件制造有限公司 | Lubricating and antirust bolt |
| CN104384572A (en) * | 2014-09-04 | 2015-03-04 | 长沙星欣机械设备有限公司 | Drill bit for deep and large hole drilling |
| CN104564975A (en) * | 2014-11-17 | 2015-04-29 | 贵州航天精工制造有限公司 | Screw thread screwing-in oil storage lubricating fastening screw assembly and use method thereof |
| CN209146092U (en) * | 2018-10-31 | 2019-07-23 | 江苏天频植保科技有限公司 | A kind of bolt sliding oiling |
| CN213176397U (en) * | 2020-09-27 | 2021-05-11 | 苏州市方成五金紧固件有限公司 | Bolt with lubricating groove |
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| CN114033782A (en) | 2022-02-11 |
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