CN113305769B - High-torque pin pulling mechanism and pin pulling method for narrow cabin section - Google Patents
High-torque pin pulling mechanism and pin pulling method for narrow cabin section Download PDFInfo
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- CN113305769B CN113305769B CN202110651094.9A CN202110651094A CN113305769B CN 113305769 B CN113305769 B CN 113305769B CN 202110651094 A CN202110651094 A CN 202110651094A CN 113305769 B CN113305769 B CN 113305769B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
- B25B13/481—Spanners; Wrenches for special purposes for operating in areas having limited access
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Abstract
The invention discloses a large-torque pin pulling mechanism and a pin pulling method for a narrow cabin section, and belongs to the field of assembling and disassembling of mechanical transmission products. The pin shaft withdrawing device comprises a trapezoidal thread self-locking unit, a double-ratchet wheel linkage unit and an adjustable hand rocker, and realizes safe and stable withdrawal of the pin shaft in a limited space. The trapezoidal thread self-locking unit provides a large pin withdrawing moment with uniform speed and stability through the special trapezoidal screws which are symmetrically distributed; the protective sleeve can effectively prevent the fixed support of the cabin section from being scratched, meanwhile, the contact area is large, and the pin pulling mechanism is firmly supported during working; the double-ratchet wheel linkage device can realize linkage screwing of the trapezoidal screws, and can adjust the position of the hand rocker through the adjustable hand rocker to adapt to the space of the cabin section and find a proper reciprocating wrenching angle and position in the narrow cabin section. The invention can effectively solve the application blank that no safe and reliable pin withdrawing tool exists in the current narrow space, and simultaneously reduces the equipment loss caused by violent pin removal.
Description
Technical Field
The invention belongs to the field of assembling and disassembling of mechanical transmission products, and relates to a high-torque pin pulling mechanism and a pin pulling method for a narrow cabin section.
Background
In narrow and small cabin sections such as a small aircraft, the servo mechanism is connected through a pin shaft to realize mutual rotation of the connecting rod and the rocker arm, and the pin shaft is a movable piece and is in small clearance fit or interference fit with the connecting piece. When the pin shaft is installed, the pin shaft is inserted into a hole groove of the connected piece from the inside of the cabin section, and the copper rod and the hammer are used for lightly knocking until the pin shaft is installed in place. When the connecting piece works, sliding friction, slight impact and alternating load effect are generated between the pin shaft and the connected piece under the action of external load. At the present stage, the flight quality and dynamic characteristic requirements of the aircraft are higher and higher, the rigidity of the servo mechanism needs to be correspondingly improved, the fit clearance between the pin shaft and the connecting piece is usually not more than 5 micrometers, cabin-level testing can be carried out after the servo mechanism is installed, and if the test result does not meet the requirements, the pin shaft needs to be disassembled to debug the servo mechanism again. But because round pin axle fit clearance is little, easily the card is dead, can bring the big problem of the dismantlement degree of difficulty this moment.
At present, the pin pulling mechanism is generally large in overall dimension and cannot be operated in a narrow space, part of pin pulling devices adopt the principle that impact force is added on a pin shaft to carry out violent pin pulling, like a sliding hammer type pin pulling device, the pin shaft and connecting parts are extremely easy to damage, under the more extreme condition, an inner hole which is slightly smaller than the diameter of the pin shaft is milled in the axial direction of the pin shaft by using a milling cutter to carry out destruction treatment, the thin-wall structure on the circumference of the pin shaft deforms, and then the pin shaft is easily pulled out. In order to smoothly and stably pull out the pin shaft, the invention designs the large-torque pin pulling mechanism, which can quickly and stably withdraw the pin shaft in a narrow space, is simple and convenient to operate, and is safe and reliable. The invention has the advantages of small volume, low cost and simple structure, has wide development prospect, is not limited to narrow cabin environments such as small aircrafts and the like in the application field, and can play a great role in the fields of micro-electro-mechanical systems, mechanical transmission and the like.
Disclosure of Invention
The invention aims to overcome the defect that in the prior art, a pin shaft is safely and reliably disassembled in a narrow cabin section such as a small aircraft, and provides a high-torque pin pulling mechanism and a pin pulling method for the narrow cabin section.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a large-torque pin pulling mechanism for a narrow cabin section comprises a protective sleeve trapezoidal thread self-locking unit, a double-ratchet wheel linkage unit and an adjustable hand lever;
the trapezoidal thread self-locking unit comprises a self-locking block and three trapezoidal screws, wherein a plurality of thread through holes are formed in the surface of the self-locking block and are arranged along a straight line, the thread through holes on two sides are symmetrical about the thread through hole in the middle, the number of the trapezoidal screws is three, the three trapezoidal screws are respectively installed in the three thread through holes of the self-locking block, and two protective sleeves are respectively sleeved at one end of each trapezoidal screw on two sides;
the double-ratchet wheel linkage unit comprises two ratchet wheel wrenches, one end of each ratchet wheel wrench is an outer hexagon, the other end of each ratchet wheel wrench is a ratchet wheel long handle, and the outer hexagon ends of the two ratchet wheel wrenches are respectively arranged in screw heads of the trapezoidal screws on the two sides;
the adjustable hand-operated rod comprises two overturning supporting blocks, two hand-operated cross beams and a lengthened handle, wherein the second through holes are formed in the hand-operated cross beams, the two overturning supporting blocks are arranged on the two sides of the hand-operated cross beams respectively, and one end of the lengthened handle penetrates through the second through holes.
Preferably, the inside coaxial arrangement of outer hexagonal body has oval head, and oval head internally mounted has the gear and with gear connection's transmission assembly, and transmission assembly's one end and outer hexagonal body coupling, the other end and ratchet long handle are connected
The tail end of the ratchet wheel long handle is provided with a connector, the top of the connector is an arc surface, and the center of the connector is provided with a first through hole.
Preferably, a round blind hole corresponding to one end of the trapezoidal screw is formed in the protective sleeve;
the outer wall of the protective sleeve is provided with a stepped shaft.
Preferably, the diameters of the two ends of the protective sleeve are different, and the diameter of one side far away from the blind hole is larger than the diameter of one side provided with the blind hole.
Preferably, the turning support block is a rectangular metal block, a third through hole is formed in the center of the upper portion of the turning support block along the thickness direction, a rectangular through groove is formed in the lower portion of the turning support block along the thickness direction, one end of the rectangular through groove is open, and fourth through holes are symmetrically formed in the side edge of the rectangular through groove; the vertex angle of one end of the turning supporting block provided with the rectangular through groove is a fillet;
the hand-operated cross beam is a rectangular block with thick middle and thin two sides;
the extension handle is circular stock, and the one end of extension handle is the hemisphere shape, and the inside of the other end is equipped with the internal thread blind hole.
Preferably, the number of the second through holes is three, the three second through holes are arranged along a straight line, and the second through holes on the two sides are symmetrical about the second through hole in the middle;
the diameters of the second through holes on the two sides are the same, and the diameter of the second through hole in the middle is larger than the diameters of the second through holes on the two sides.
Preferably, the protective sleeve is made of polytetrafluoroethylene or copper alloy material;
the self-locking block is a rectangular block, and four vertex angles of the rectangular block are C5 chamfers;
the external dimension of the trapezoidal screw is consistent with the dimension of the internal hexagonal screw M5x 50.
Preferably, the length of the outer hexagon is 5 mm;
the diameter of the second through hole is 6mm at most.
A pin pulling method based on the high-torque pin pulling mechanism for the narrow cabin section comprises the following steps:
step 1) sequentially screwing three trapezoidal screws into three threaded through holes on the surface of the self-locking block;
step 2) respectively sleeving the two protective sleeves at one end of the trapezoidal screws at the two sides;
step 3) respectively installing one end of an outer hexagonal body of the ratchet wrench in screw heads of the trapezoidal screws positioned on the two sides;
and 4) respectively installing the two turnover supporting blocks on two sides of the hand-operated cross beam, fixedly connecting the two turnover supporting blocks by using a fixing pin and a cotter pin, placing the lengthened handle on one side of a second through hole on the hand-operated cross beam, penetrating a screw through the hand-operated cross beam from the other side, and screwing the lengthened handle in the hand-operated cross beam until the lengthened handle is screwed down.
Preferably, in the step 1), the screwing depth of the middle threaded through hole is greater than that of the threaded through holes on the two sides;
in the step 3), a round blind hole corresponding to one end of the trapezoidal screw is formed in the protective sleeve, and the sleeving and meshing depth of the protective sleeve is positioned based on the depth of the blind hole.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a large-torque pin pulling mechanism for a narrow cabin section, which comprises a trapezoidal thread self-locking unit, a double-ratchet wheel linkage unit and an adjustable hand rocker combination, and realizes the safe and stable exit of a pin shaft in a limited space. The trapezoidal thread self-locking unit provides a large pin withdrawing moment with uniform and stable speed through the special trapezoidal screws which are symmetrically distributed, and has compact structure and high reliability; the protective sleeve can effectively prevent the fixed support of the cabin section from being scratched, meanwhile, the contact area is large, the pin pulling mechanism is firmly supported during working, the safety is improved, and the service life is prolonged; the double-ratchet linkage device can realize linkage tightening of the trapezoidal screws, and can adjust the position of the hand lever through the adjustable hand lever to adapt to the space of the cabin section and find a proper reciprocating wrenching angle and position in the narrow cabin section. The double-ratchet wheel linkage device is simple and efficient to install and high in maintainability. The pin pulling mechanism is more compact in design by optimizing spatial layout, the design space is effectively saved, meanwhile, the hand rocker is increased by fully utilizing the characteristic that the axial space of the cabin is large, and the labor-saving effect is achieved. The invention can effectively solve the application blank that no safe and reliable pin withdrawing tool exists in the current narrow space, and simultaneously reduces the equipment loss caused by violent pin removal.
Furthermore, the turnover supporting block can rotate around one end of the fillet, so that the device can be used in a narrow cabin with small transverse space or small longitudinal space, and the turnover angle is adjusted along with the space angle.
The invention also discloses a pin pulling method for the narrow cabin section, which is completed based on the device, the pin pulling work is divided into two stages, in the first stage, the special trapezoidal screw is in threaded connection with the trapezoidal thread self-locking block and the pin shaft to be withdrawn, and the trapezoidal screws on the two sides are adjusted to be tightly attached to the fixed support of the cabin section; in the second stage, the adjustable hand rocker is pulled in a reciprocating manner, the trapezoidal screws on two sides of the trapezoidal thread self-locking block are rotated by torque through the double-ratchet wheel linkage device, and the pin shaft to be withdrawn is subjected to symmetrical, uniform and synchronous axial force, so that the safe and stable pin withdrawing process is completed. Aiming at the problem of safe and reliable disassembly of the pin shaft in narrow cabin sections such as small aircrafts and the like, the invention firstly applies the trapezoidal thread self-locking and double-ratchet wheel linkage device to the pin pulling mechanism to realize the safe and stable pin withdrawing process of the pin shaft to be withdrawn.
Drawings
FIG. 1 is a top view of the pin pulling mechanism of the present invention;
FIG. 2 is a right side view of the pin pulling mechanism of the present invention;
FIG. 3 is a left side view of the pin pulling mechanism of the present invention;
FIG. 4 is a front view of the pin pulling mechanism of the present invention;
FIG. 5 is a front cross-sectional view of the pin pulling mechanism of the present invention;
fig. 6 is a schematic structural view of the fast turnover support of the present invention.
Wherein: 1-pin shaft to be withdrawn; 2-trapezoidal screws; 3-self-locking block; 4-a protective sleeve; 5-ratchet wrench; 6-fixing the pin; 7-hand-operated crossbeam; 8-turning over the supporting block; 9-turning over the pin; 10-lengthening handle.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
example 1
As shown in fig. 1, a large-torque pin pulling mechanism for a narrow cabin section comprises a protective sleeve 4, a trapezoidal thread self-locking unit, a double-ratchet wheel linkage unit and an adjustable hand lever; the trapezoidal thread self-locking unit comprises a self-locking block 3 and trapezoidal screws 2, three thread through holes are formed in the surface of the self-locking block 3 and are arranged along a straight line, the thread through holes on the two sides are symmetrical about the thread through hole in the middle, the three trapezoidal screws 2 are respectively arranged in the three thread through holes of the self-locking block 3, and two protective sleeves 4 are respectively sleeved at one end of each trapezoidal screw 2 on the two sides; as shown in fig. 2 and 3, the double-ratchet linkage unit comprises two ratchet wrenches 5, one end of each ratchet wrench 5 is a hollow external hexagon, the long ratchet handle at the other end of each ratchet wrench 5 is provided with a long handle, and the external hexagons of the two ratchet wrenches 5 are respectively arranged in the screw heads of the trapezoidal screws 2 at two sides; adjustable hand pole has seted up the second through-hole including upset supporting shoe 8, hand crossbeam 7 and extension handle 10 on the hand crossbeam 7, and upset supporting shoe 8 is equipped with two and installs respectively in the both sides of hand crossbeam 7, and the second through-hole is run through to the one end of extension handle 10. The inside coaxial arrangement of outer hexagonal body has oval head, oval head internally mounted have the gear and with gear connection's drive mechanical device. The number of the second through holes is three, the three second through holes are arranged along a straight line, and the second through holes on the two sides are symmetrical about the second through hole in the middle; the diameters of the second through holes on the two sides are the same, and the diameter of the second through hole in the middle is larger than the diameters of the second through holes on the two sides.
Example 2
The contents are the same as those of example 1 except for the following.
A section of connector is milled at the center of the tail end of the long handle of the ratchet wheel, the top of the connector is an arc surface, and a first through hole is formed in the center of the connector.
As shown in fig. 6, the turning support block 8 is a sheet metal block, a third through hole is arranged at the upper middle position of the turning support block 8, a rectangular through groove is arranged at the lower position along the thickness direction to form a double-lug structure, a fourth through hole is arranged at the center position of the through groove perpendicular to the direction of the through groove, and a round angle is arranged at one side of the double lugs.
Example 3
The contents are the same as those of example 1 except for the following.
The hand-operated cross beam 7 is a rectangular block with thick middle and thin two sides.
As shown in fig. 5, the lengthened handle 10 is a round long rod, one end of the lengthened handle 10 is in a hemispherical shape, and an internal threaded blind hole is formed inside the other end of the lengthened handle 10.
A round blind hole corresponding to one end of the trapezoidal screw 2 is formed in the protective sleeve 4; the outer wall of the protective sleeve 4 is provided with a stepped shaft. The diameters of the two ends of the protective sleeve 4 are different, and the diameter of one side far away from the blind hole is larger than that of one side provided with the blind hole.
Example 4
A large-torque pin pulling mechanism for a narrow cabin mainly comprises a protective sleeve 4, a self-locking block 3, a trapezoidal screw 2, a double-ratchet wheel linkage unit and an adjustable hand lever. Wherein protective sleeve 4 is a set of two, and protective sleeve 4's inside is circular blind hole, and the outside is the step shaft, and it is great to keep away from blind hole one side diameter. From locking piece 3 is a rectangular block, and four apex angles set up the C5 chamfer, at rectangular block surface bilateral symmetry distribution 3 trapezoidal thread through-holes, the interval of screw thread through-hole can design according to actual conditions. The shape of the trapezoidal screw 2 is consistent with that of a standard GB70.1 internal hexagonal screw M5x50, the difference is that a thread part adopts trapezoidal threads with better strength, 3 special trapezoidal screws are used in one set of pin pulling mechanism, and two of the trapezoidal screws are axially milled to form a 15mm long circular optical axis in the front of the threads. The double-ratchet wheel linkage unit comprises a pair of reversible ratchet wheel wrenches 5, one end of each ratchet wheel wrench 5 is an outer hexagonal body with the length of 5mm, and a gear and a multi-stage claw type transmission assembly connected with the gear are arranged in an oval head coaxial with the outer hexagonal body. The other end is a long handle of the ratchet wheel, a section of connecting head is milled at the center of the tail end, the top of the connecting head is an arc surface, and the center is a through hole. The adjustable hand rocker mainly comprises 3 parts, which are respectively: a turning support block 8, a hand-operated crossbeam 7 and a lengthened handle 10. Wherein upset supporting shoe 8 is a slice form metal block, is equipped with a through-hole at the metal block on the upper side intermediate position, and the position is equipped with a rectangle through groove along the thickness direction on the lower side, forms the ears structure, and the perpendicular to leads to the groove direction, puts to be equipped with a through-hole at the central point that leads to the groove, sets up the fillet on ears one side. The hand-operated cross beam 7 is a rectangular block with thick middle and thin two sides, 3 through holes are sequentially arranged in the length direction of the rectangular block, the holes on the two sides are symmetrical and small, the middle hole is a 6mm unthreaded hole, and the unthreaded holes with the same size are arranged in the width direction of the rectangular block and are vertically intersected with the 6mm middle hole. The shape of the lengthened handle 10 is a round long rod, one end of the lengthened handle is in a hemispherical shape, the inner cavity of the other end of the lengthened handle is an internal thread blind hole, and two sides of the excircle of the lengthened handle are cut into flat shapes with the length of 10 mm.
In the above embodiment, the protective sleeve 4 is made of teflon or copper alloy material; the self-locking block 3 is a rectangular block, and four vertex angles of the rectangular block are C5 chamfers; the external dimensions of the trapezoidal screw 2 are identical to those of the internal hexagonal screw M5x 50.
Example 5
The pin pulling method for the high-torque pin pulling mechanism for the narrow cabin section comprises the following steps:
step 1) sequentially screwing three trapezoidal screws 2 into three threaded through holes on the surface of a self-locking block 3, wherein the screwing depth of the threaded through hole in the middle is larger than that of the threaded through holes on two sides;
step 2) respectively sleeving two protective sleeves 4 at one end of the trapezoidal screws 2 at two sides;
step 3) one end of an outer hexagon of the ratchet wrench 5 is respectively arranged in screw heads of the trapezoidal screws 2 positioned at two sides, a round blind hole corresponding to one end of the trapezoidal screw 2 is formed in the protective sleeve 4, and the sleeving and meshing depth of the protective sleeve 4 is positioned based on the depth of the blind hole;
and 4) respectively installing the two overturning supporting blocks 8 at two sides of the hand-operated crossbeam 7, fixedly connecting the two overturning supporting blocks by using fixing pins and cotters, placing the lengthened handle 10 at a second through hole on the hand-operated crossbeam 7, penetrating a screw through the hand-operated crossbeam from the other side, screwing the lengthened handle 10 until screwing, finishing the installation of the adjustable hand-operated rod, assembling a double-lug structure of the overturning supporting blocks 8 with a connector of the ratchet wrench 5 as shown in fig. 4 and 5, and connecting the two overturning supporting blocks by penetrating two overturning pins 9.
The working principle of the high-torque pin pulling mechanism for the narrow cabin section is as follows:
3 special trapezoidal screws 2 are sequentially screwed into the self-locking block 3, the protective sleeves 4 are sleeved in the front optical axes of the trapezoidal screws 2 on the two sides, the protective sleeves 4 are tightly attached to the fixed support of the cabin section by adjusting the screwing depth, and the trapezoidal screw 2 in the middle is screwed into the pin shaft 1 to be withdrawn, so that the two are connected into a whole. A pair of ratchet wrenches 5 are inserted into hexagonal grooves in trapezoidal screws 2 on two sides, a double-lug mechanism of a turning supporting block 8 is fixedly connected with one side of a connector of the ratchet wrench 5 through a turning pin 9, the other end of the turning supporting block 8 is immediately attached to a hand-operated cross beam 7 and is connected with the hand-operated cross beam through a fixing pin 6, and finally, an M6 screw penetrates through the hand-operated cross beam 7 and is screwed into a lengthened handle until the lengthened handle is screwed down, and the assembly of the large-torque pin pulling mechanism is completed.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. A large-torque pin pulling mechanism for a narrow cabin section is characterized by comprising a protective sleeve (4), a trapezoidal thread self-locking unit, a double-ratchet wheel linkage unit and an adjustable hand rocker;
the trapezoidal thread self-locking unit comprises a self-locking block (3) and trapezoidal screws (2), a plurality of thread through holes are formed in the surface of the self-locking block (3), the thread through holes are arranged along a straight line, the thread through holes on the two sides are symmetrical with the thread through hole in the middle, the number of the trapezoidal screws (2) is three, the three thread through holes are respectively installed in the three thread through holes of the self-locking block (3), and two protective sleeves (4) are respectively sleeved at one end of each trapezoidal screw (2) on the two sides;
the double-ratchet wheel linkage unit comprises two ratchet wheel wrenches (5), one end of each ratchet wheel wrench (5) is an outer hexagon, the other end of each ratchet wheel wrench (5) is a ratchet wheel long handle, and the outer hexagon ends of the two ratchet wheel wrenches (5) are respectively installed in screw heads of the trapezoidal screws (2) positioned on the two sides;
the adjustable hand-operated rod comprises two turning supporting blocks (8), two hand-operated cross beams (7) and a lengthened handle (10), wherein a second through hole is formed in each hand-operated cross beam (7), the two turning supporting blocks (8) are respectively installed on two sides of each hand-operated cross beam (7), and one end of the lengthened handle (10) penetrates through the second through hole;
the double-lug mechanism of the turning supporting block (8) is fixedly connected with one side of a connector of the ratchet wrench (5) through a turning pin (9), the other end of the turning supporting block (8) is attached to the hand-operated cross beam (7) and is connected with the hand-operated cross beam through a fixing pin (6), and a screw penetrates through the hand-operated cross beam (7) and is screwed into the lengthened handle (10) to be connected.
2. The large-torque pin pulling mechanism for the narrow cabin section is characterized in that an oval head is coaxially mounted inside the outer hexagonal body, a gear and a transmission assembly connected with the gear are mounted inside the oval head, one end of the transmission assembly is connected with the outer hexagonal body, and the other end of the transmission assembly is connected with the ratchet wheel long handle;
the tail end of the ratchet wheel long handle is provided with a connector, the top of the connector is an arc surface, and the center of the connector is provided with a first through hole.
3. The large-torque pin pulling mechanism for the narrow cabin section according to claim 1, wherein a round blind hole corresponding to one end of the trapezoidal screw (2) is formed in the protective sleeve (4);
the outer wall of the protective sleeve (4) is provided with a stepped shaft.
4. The high-torque pin pulling mechanism for the narrow cabin section according to claim 3, wherein the diameters of two ends of the protection sleeve (4) are different, and the diameter of the side far away from the blind hole is larger than the diameter of the side provided with the blind hole.
5. The large-torque pin pulling mechanism for the narrow and small cabin section according to claim 1, wherein the overturning supporting block (8) is a rectangular metal block, a third through hole is formed in the center of the upper portion of the overturning supporting block (8) along the thickness direction, a rectangular through groove is formed in the lower portion of the overturning supporting block (8) along the thickness direction, one end of the rectangular through groove is opened, and fourth through holes are symmetrically formed in the side edge of the rectangular through groove; the vertex angle of one end of the turning supporting block (8) provided with the rectangular through groove is a fillet;
the hand-operated cross beam (7) is a rectangular block with thick middle and thin two sides;
the lengthening handle (10) is a round long rod, one end of the lengthening handle (10) is in a hemispherical shape, and an internal thread blind hole is formed in the other end of the lengthening handle.
6. The high-torque pin pulling mechanism for the narrow cabin section according to claim 1, wherein the number of the second through holes is three, the three second through holes are arranged along a straight line, and the second through holes on two sides are symmetrical with respect to the middle second through hole;
the diameters of the second through holes on the two sides are the same, and the diameter of the second through hole in the middle is larger than the diameters of the second through holes on the two sides.
7. The high-torque pin pulling mechanism for the narrow cabin section according to claim 1, wherein the protective sleeve (4) is made of polytetrafluoroethylene or copper alloy material;
the self-locking block (3) is a rectangular block, and four vertex angles of the rectangular block are C5 chamfers;
the external dimension of the trapezoidal screw (2) is consistent with the dimension of the internal hexagonal screw M5x 50.
8. The high torque pin pulling mechanism for a small cabin section according to claim 1, wherein the length of the outer hexagon is 5 mm;
the diameter of the second through-hole is 6mm at the maximum.
9. A pin pulling method of a high-torque pin pulling mechanism for a narrow cabin section based on any one of claims 1 to 8 is characterized by comprising the following steps:
step 1), sequentially screwing three trapezoidal screws (2) into three threaded through holes on the surface of a self-locking block (3);
step 2), respectively sleeving two protective sleeves (4) at one ends of the trapezoidal screws (2) at two sides;
step 3) one end of an outer hexagonal body of the ratchet wrench (5) is respectively arranged in screw heads of the trapezoidal screws (2) positioned at two sides;
and 4) respectively installing the two turnover supporting blocks (8) on two sides of the hand-operated cross beam (7), fixedly connecting the two turnover supporting blocks by using fixing pins and cotter pins, placing the lengthened handle (10) on one side of a second through hole on the hand-operated cross beam (7), penetrating a screw through the hand-operated cross beam (7) from the other side, and screwing the lengthened handle (10) until screwing.
10. The method of claim 9,
in the step 1), the screwing depth of the middle threaded through hole is greater than that of the threaded through holes on the two sides;
in the step 3), a round blind hole corresponding to one end of the trapezoidal screw (2) is formed in the protective sleeve (4), and the sleeving and meshing depth of the protective sleeve (4) is located based on the depth of the blind hole.
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| CN202110651094.9A CN113305769B (en) | 2021-06-10 | 2021-06-10 | High-torque pin pulling mechanism and pin pulling method for narrow cabin section |
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| CN202110651094.9A CN113305769B (en) | 2021-06-10 | 2021-06-10 | High-torque pin pulling mechanism and pin pulling method for narrow cabin section |
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| CN106141988A (en) * | 2016-08-02 | 2016-11-23 | 江西电力职业技术学院 | Pin removal |
| CN108555825A (en) * | 2018-06-20 | 2018-09-21 | 国家电网有限公司 | Pin extracting apparatus |
| CN111136612A (en) * | 2018-11-06 | 2020-05-12 | 中车洛阳机车有限公司 | Special tool for disassembling regulating and controlling gear of locomotive diesel engine |
| CN212071778U (en) * | 2020-05-18 | 2020-12-04 | 浙江三一装备有限公司 | Pin pulling device |
| CN212071779U (en) * | 2020-05-18 | 2020-12-04 | 浙江三一装备有限公司 | Pin pulling device |
-
2021
- 2021-06-10 CN CN202110651094.9A patent/CN113305769B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2328646A1 (en) * | 1973-06-06 | 1975-01-02 | Heinrich Liebig | Extractor for hollow dowels - has shank carrying pivoting arm which can be passed through the dowel bore |
| CN106141988A (en) * | 2016-08-02 | 2016-11-23 | 江西电力职业技术学院 | Pin removal |
| CN108555825A (en) * | 2018-06-20 | 2018-09-21 | 国家电网有限公司 | Pin extracting apparatus |
| CN111136612A (en) * | 2018-11-06 | 2020-05-12 | 中车洛阳机车有限公司 | Special tool for disassembling regulating and controlling gear of locomotive diesel engine |
| CN212071778U (en) * | 2020-05-18 | 2020-12-04 | 浙江三一装备有限公司 | Pin pulling device |
| CN212071779U (en) * | 2020-05-18 | 2020-12-04 | 浙江三一装备有限公司 | Pin pulling device |
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|---|---|
| CN113305769A (en) | 2021-08-27 |
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