CN220279530U - Tail pipe assembly fixture - Google Patents
Tail pipe assembly fixture Download PDFInfo
- Publication number
- CN220279530U CN220279530U CN202321272103.4U CN202321272103U CN220279530U CN 220279530 U CN220279530 U CN 220279530U CN 202321272103 U CN202321272103 U CN 202321272103U CN 220279530 U CN220279530 U CN 220279530U
- Authority
- CN
- China
- Prior art keywords
- tail pipe
- tail
- outer diameter
- hole
- drill bit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000003825 pressing Methods 0.000 claims abstract description 45
- 230000007704 transition Effects 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a tail pipe assembly fixture, which comprises a pressing sleeve and a guide sleeve, wherein a cylindrical hole which is opened forward and can be in clearance fit with a small outer diameter section of a tail pipe is arranged in the middle of the pressing sleeve along the axial direction of the pressing sleeve and is used for fixedly mounting the tail pipe, and the length of the cylindrical hole is larger than that of the small outer diameter section of the tail pipe; the pressing sleeve comprises a circular ring section with smaller outer diameter at the front end and a barrel section with larger outer diameter at the rear end, and the circular ring section is matched with the tail pipe step; the whole guide sleeve is of a cylindrical structure, and the tail part of the drill bit and the pressing sleeve can be coaxially arranged together by the guide sleeve; the large outer diameter section of the tail pipe can be inserted into the tail of the drill bit by pressing the end face of the tail end of the pressing sleeve. The tool can ensure that the tail pipe and the drill bit hole are coaxial, and the end face of the striking tool can ensure that the tail pipe is assembled without abnormal deformation.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a tail pipe assembly fixture.
Background
At present, a tail pipe is assembled by a hammer beating method in engineering enterprises, the tail pipe is made of high-density nylon, the hardness of the tail pipe is softer, and a drill bit matched with the tail pipe is made of metal, so that the hardness of the tail pipe is higher. When the drill bit is installed, the matching part of the tail pipe is aligned with the tail hole of the drill bit, and then the tail pipe is hit by using a hammer, so that the tail pipe is softer, and certain deformation can be generated in the process of knocking the tail pipe, so that the tail pipe is assembled into the drill bit hole. In the process, if the tail pipe is not coaxial with the drill bit hole, the tail pipe is easily installed in a deviated mode, and meanwhile, the end face of the tail pipe is easily punched out of a pit due to the fact that the tail pipe is strongly hit. The tail pipe has good toughness, and the tail pipe end face is hardly assembled into a drill hole by striking the tail pipe end face with a hammer. If the tail pipe is not coaxial with the drill bit hole or the end face of the tail pipe is deformed, abnormal failures such as tail pipe fracture, excessive wear and the like are easy to occur in the using process of the drill bit.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides the tail pipe assembly tool, the tail pipe and a drill hole can be ensured to be coaxial by using the tool, and the end face of the striking tool can ensure that the tail pipe assembly has no abnormal deformation.
In order to achieve the above purpose, the utility model adopts the following specific scheme:
a tail pipe assembly fixture can be used for mounting a tail pipe to the tail part of a drill bit, and the tail pipe is of a cylindrical structure with a large end and a small end, comprises a large outer diameter section and a small outer diameter section, and is in step transition; the assembly fixture comprises:
the middle part of the pressing sleeve is axially provided with a cylindrical hole which is opened forward and can be in clearance fit with the small outer diameter section of the tail pipe, the cylindrical hole is used for fixedly mounting the tail pipe, and the length of the cylindrical hole is longer than that of the small outer diameter section of the tail pipe; the pressing sleeve comprises a circular ring section with smaller outer diameter at the front end and a barrel section with larger outer diameter at the rear end, and the circular ring section is matched with the tail pipe step;
the guide sleeve is of a cylindrical structure, and the tail part of the drill bit and the pressing sleeve can be coaxially arranged together by the guide sleeve;
the large outer diameter section of the tail pipe can be inserted into the tail of the drill bit by pressing the end face of the tail end of the pressing sleeve.
As a preferable scheme, a circle of bulges which can be abutted against the end face of the tail end of the drill bit are arranged on the inner wall of the guide sleeve, and the inner diameter of each bulge is larger than the outer diameter of the circular ring section and smaller than the outer diameter of the barrel section; the inner hole of the guide sleeve is divided into a front hole and a rear hole with the same axis through the bulge, wherein the front hole can be in clearance fit with the tail part of the drill bit, and the rear hole can be in clearance fit with the barrel section of the press sleeve.
Preferably, the assembly length L of the rear hole is equal to the assembly depth of the tail pipe.
Preferably, the front hole and the rear hole of the guide sleeve are symmetrically distributed with the bulge as a center.
As an optimal scheme, the side wall of the guide sleeve is provided with an air vent groove.
The beneficial effects are that:
1) The assembly fixture comprises the pressing sleeve and the guide sleeve, wherein the annular section of the pressing sleeve is contacted with the step of the tail pipe, the tail pipe is not contacted with the bottom surface of the cylindrical hole in the pressing sleeve, and when external force strikes the end surface of the pressing sleeve, the striking force is transmitted to the contact surface of the annular section and the step to apply force for annular surface contact, so that the stress of the tail pipe is uniform;
2) The assembly length of the rear hole of the guide sleeve is equal to the assembly depth of the tail pipe, and when the front end surface of the sleeve pressing barrel section is contacted with the end surface of the tail end of the bulge in the assembly process, the tail pipe is assembled in place, so that the deformation caused by excessive striking of the tail pipe is avoided;
3) The front hole and the rear hole of the guide sleeve are symmetrically distributed by taking the bulge as a center, so that the front hole or the rear hole of the guide sleeve can be matched with the tail part of the drill bit or the press sleeve, and the front end and the rear end are not needed to be distinguished when the guide sleeve is used, and the guide sleeve is simple and convenient.
4) The assembly fixture is simple in structure and convenient to manufacture.
Drawings
FIG. 1 is a schematic view of the structure of a drill bit, a tailpipe and an assembly fixture when installed in place.
Fig. 2 is a schematic structural diagram of the assembly fixture.
Fig. 3 is a schematic view of the structure of the guide sleeve and the drill bit.
Fig. 4 is a schematic structural view of the tailpipe and the press sleeve in cooperation.
Fig. 5 is a schematic view of the structure when the tail pipe is put into the tail of the drill bit.
The marks in the figure: 1. drill bit 2, tail pipe 3, uide bushing 301, front hole 302, boss 303, back hole 4, press sleeve 401, ring section 402, barrel section 403, cylinder hole.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
It should be noted that, hereinafter, "tail portion" refers to a small head end of the drill bit 1, the "front end" of the remaining components refer to an end facing the drill bit 1, and the "tail portion" and "rear end" refer to an end facing away from the drill bit 1.
It should be noted that, referring to fig. 4, the tail pipe 2 has a cylindrical structure with a large end and a small end, and includes a large outer diameter section and a small outer diameter section, and the two sections are in step transition.
The utility model discloses a tail pipe assembly tool, referring to fig. 2, the assembly tool comprises a pressing sleeve 4 and a guide sleeve 3, wherein the pressing sleeve 4 is used for fixedly mounting a tail pipe 2, the guide sleeve 3 is used for coaxially mounting the pressing sleeve 4 provided with the tail pipe 2 and the tail part of a drill bit 1 together, and a tail end face of the pressing sleeve 4 is hit by a hammer or force is applied to the tail end face of the pressing sleeve 4 by a single-column hydraulic machine, so that the tail pipe 2 can be mounted to the tail part of the drill bit 1.
In a specific embodiment, referring to fig. 4, a cylindrical hole 403 that is open towards the front and can be in clearance fit with the small-outer-diameter section of the tail pipe 2 is provided in the middle of the pressing sleeve 4 along the axial direction thereof, for fixedly mounting the tail pipe 2; and the length of the cylindrical bore 403 is greater than the length of the small outer diameter section of the tailpipe 2. The pressing sleeve 4 sequentially comprises a circular ring section 401 with a smaller outer diameter and a barrel section 402 with a larger outer diameter from front to back, wherein the circular ring section 401 is matched with the step of the tail pipe 2, more specifically, the front end shape of the circular ring section 401 is consistent with the shape of the step of the tail pipe 2, and the arranged circular ring section 401 pushes the step of the tail pipe 2 so as to enable the tail pipe 2 to be pressed into the tail part of the drill bit. The annular section 401 of the pressing sleeve 4 is contacted with the step of the tail pipe 2, the tail pipe 2 is not contacted with the bottom surface of the cylindrical hole 403 in the pressing sleeve 4, and when the end surface of the pressing sleeve 4 is hit, the hitting force is transmitted to the contact surface of the annular section 401 and the step to apply force for the annular surface contact, so that the stress of the tail pipe 2 is uniform.
In a preferred embodiment, referring to fig. 3, a ring of protrusions 302 capable of abutting against the end face of the tail end of the drill bit 1 is provided on the inner wall of the guide sleeve 3, and the inner diameter of the protrusions 302 is larger than the outer diameter of the circular ring section 401 and smaller than the outer diameter of the barrel section 402; the inner hole of the guide sleeve 3 is divided into a front hole 301 and a rear hole 303 with the same axis by the bulge 302, wherein the front hole 301 can be in clearance fit with the tail part of the drill bit 1, and the rear hole 303 can be in clearance fit with the barrel section 402 of the press sleeve 4.
In the above embodiment, preferably, the front hole 301 and the rear hole 303 of the guide sleeve 3 are symmetrically distributed with the protrusion 302 as a center, so that the front hole 301 or the rear hole 303 of the guide sleeve can be matched with the tail part of the drill bit 1 or the press sleeve 4, and the front end and the rear end are not needed to be distinguished when the guide sleeve is used, which is simple and convenient.
Preferably, referring to fig. 5, the assembly length L of the rear hole 303 is equal to the assembly depth of the tail pipe 2, and when the front end surface of the barrel section 402 contacts with the tail end surface of the boss 302, the tail pipe 2 is guaranteed to be assembled in place, so as to avoid deformation caused by excessive striking of the tail pipe 2.
In a preferred embodiment, the side wall of the guide sleeve 3 is provided with ventilation grooves.
Specifically, the tail pipe 2 is a nylon tail pipe.
The method for assembling the tail pipe by using the tool is detailed as follows:
step one, as shown in fig. 3, a guide sleeve 3 is arranged at the tail end of a drill bit 1, an inner hole of the guide sleeve 3 is in clearance fit with the outer circle of the drill bit 1, a protrusion 302 in the guide sleeve 3 is in contact with the end face of the tail end of the drill bit 1, and the guide sleeve 3 can be ensured to be coaxial with the outer circle and the inner hole of the drill bit 1;
step two, as shown in fig. 4, the small outer diameter section of the tail pipe 2 is arranged in the cylindrical hole 403 of the pressing sleeve 4, and the cylindrical hole 403 of the pressing sleeve 4 is in contact with the outer circle of the small outer diameter section of the tail pipe 2, so that the two sections can be ensured to be coaxial. The annular section of the pressing sleeve 4 is contacted with the step of the tail pipe 2, and can be used as a force application point to push the tail pipe 2 to be pressed into the tail part of the drill bit 1, so that the end face of the tail end of the tail pipe 2 is prevented from being directly hit by a hammer, and the tail end of the tail pipe 2 is prevented from being deformed abnormally;
step three, as shown in fig. 5, the front end of the tail pipe 2 is aligned to the tail of the drill bit 1, and at this time, the outer circle of the pressing sleeve 4 is in contact fit with the rear hole 303 of the guide sleeve 3, so that the tail pipe 2, the pressing sleeve 4 and the guide sleeve 3 can be ensured to be coaxial. Because the diameter of the outer circle of the large outer diameter section of the tail pipe 2 is larger than the diameter of the inner hole at the tail part of the drill bit 1, when the two sections are contacted, the tail pipe 2 cannot be smoothly pressed into the tail part of the drill bit 1, and a hammer is required to be used for striking the tail end face of the pressing sleeve 4 so as to push the tail pipe 2 to be pressed into the tail part of the drill bit 1, and deformation and damage caused by the fact that the hammer directly strikes the tail end face of the tail pipe 2 are avoided. When the front end face of the barrel section 402 in the pressing sleeve 4 contacts with the tail end face of the protrusion 302, the tail pipe 2 is guaranteed to be assembled in place, as shown in fig. 1, at the moment, the tail end face of the pressing sleeve 4 is continuously hit, so that the tail pipe 2 cannot be further pressed into the drill bit 1, and the tail end of the tail pipe 2 is prevented from being seriously deformed;
and fourthly, clearance fit is realized between the tail pipe 2 and the pressing sleeve 4, between the pressing sleeve 4 and the guide sleeve 3 and between the guide sleeve 3 and the drill bit 1, and the pressing sleeve 4 and the guide sleeve 3 are taken down, so that the assembly operation is completed.
The above assembling method can ensure that the tail pipe 2 is coaxial with the drill bit 1, and the tail pipe 2 is not deformed abnormally.
The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. All equivalent changes or modifications made according to the essence of the present utility model should be included in the scope of the present utility model.
Claims (5)
1. A tail pipe assembly fixture by which a tail pipe (2) can be mounted at the tail part of a drill bit (1), which is characterized in that the tail pipe (2) has a cylindrical structure with a large end and a small end, and comprises a large outer diameter section and a small outer diameter section, and the two sections are in step transition; the assembly fixture comprises:
the middle part of the pressing sleeve (4) is provided with a cylindrical hole (403) which is open forward and can be in clearance fit with the small outer diameter section of the tail pipe (2) along the axial direction of the pressing sleeve, the pressing sleeve is used for fixedly mounting the tail pipe (2), and the length of the cylindrical hole (403) is larger than that of the small outer diameter section of the tail pipe (2); the pressing sleeve (4) comprises a circular ring section (401) with smaller outer diameter at the front end and a barrel section (402) with larger outer diameter at the rear end, and the circular ring section (401) is matched with the step of the tail pipe (2);
the guide sleeve (3) is of a cylindrical structure, and the guide sleeve (3) can coaxially install the tail part of the drill bit (1) and the pressing sleeve (4) together;
the large outer diameter section of the tail pipe (2) can be inserted into the tail of the drill bit (1) by pressing the end face of the tail end of the pressing sleeve (4).
2. The tail pipe assembly tool according to claim 1, wherein a circle of protrusions (302) capable of being abutted against the tail end face of the drill bit (1) are arranged on the inner wall of the guide sleeve (3), and the inner diameter of each protrusion (302) is larger than the outer diameter of the circular ring section (401) and smaller than the outer diameter of the circular barrel section (402); the inner hole of the guide sleeve (3) is divided into a front hole (301) and a rear hole (303) with the same axis through the bulge (302), wherein the front hole (301) can be in clearance fit with the tail part of the drill bit (1), and the rear hole (303) can be in clearance fit with the barrel section (402) of the press sleeve (4).
3. A tailpipe fitting according to claim 2, wherein the fitting length L of the rear hole (303) is equal to the fitting depth of the tailpipe (2).
4. A tailpipe assembly tool according to claim 2, wherein the front hole (301) and the rear hole (303) of the guide sleeve (3) are symmetrically distributed with the protrusion (302) as a center.
5. The tail pipe assembly fixture according to claim 1, wherein the side wall of the guide sleeve (3) is provided with an air vent groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321272103.4U CN220279530U (en) | 2023-05-24 | 2023-05-24 | Tail pipe assembly fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321272103.4U CN220279530U (en) | 2023-05-24 | 2023-05-24 | Tail pipe assembly fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220279530U true CN220279530U (en) | 2024-01-02 |
Family
ID=89343656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321272103.4U Active CN220279530U (en) | 2023-05-24 | 2023-05-24 | Tail pipe assembly fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220279530U (en) |
-
2023
- 2023-05-24 CN CN202321272103.4U patent/CN220279530U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |