CN215616322U - High-speed railway wheel rolling mill hollow shaft lock nut dismouting frock - Google Patents
High-speed railway wheel rolling mill hollow shaft lock nut dismouting frock Download PDFInfo
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- CN215616322U CN215616322U CN202122204998.5U CN202122204998U CN215616322U CN 215616322 U CN215616322 U CN 215616322U CN 202122204998 U CN202122204998 U CN 202122204998U CN 215616322 U CN215616322 U CN 215616322U
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- lock nut
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- pawl
- positioning seat
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- 238000005096 rolling process Methods 0.000 title claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 28
- 230000000903 blocking effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 description 8
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a locking nut dismounting tool for a hollow shaft of a high-speed rail wheel rolling mill, which belongs to the technical field of tool fixtures and comprises an anti-rotation positioning seat matched with the hollow shaft, wherein a driving oil cylinder is arranged on the anti-rotation positioning seat and is rotationally connected with one end of a rotating arm, and the other end of the rotating arm is matched with a plurality of key grooves in the peripheral direction of a locking nut through a ratchet wheel and pawl mechanism.
Description
Technical Field
The utility model relates to the technical field of tool fixtures, in particular to a tool for disassembling and assembling a locking nut of a hollow shaft of a high-speed rail wheel rolling mill.
Background
A bearing and a check ring are installed on a hollow shaft of the high-speed rail wheel rolling mill, and in order to enable the bearing to be installed more firmly, two locking nuts are installed on the hollow shaft to tightly press the outer end of the check ring.
When locking nut is installed, a traveling crane is needed to hang the upper end of the hollow shaft, the vertical installation is carried out, the stop blocks are clamped in the key grooves of the two locking nuts, the stop blocks are held by one person, the stop blocks are knocked by one person through a hammer to install the locking nuts, and the locking nuts, the check rings and the bearings are enabled to be compressed. When dismantling lock nut, need use the driving to hang the hollow shaft upper end, the vertical dismantlement of placing, because lock nut, retaining ring and bearing compress tightly the installation, very difficult when just beginning to dismantle, the on-the-spot dog card of using is in one of them lock nut keyway, and the dog is held up alone, and alone strikes the dog with the hammer in the opposite direction and dismantles lock nut, and reuse dog card is in another lock nut keyway, and alone holds up the dog, and alone strikes the dog with the hammer in the opposite direction and dismantles lock nut.
The traditional mounting and dismounting method of the locking nut leads to long time for dismounting the locking nut on site, the workload is large, when the hammer is used for knocking the stop block for mounting, the key groove of the spare part locking nut can be damaged to some extent, the spare part can be scrapped when the hammer is serious, the replacement cost is increased, the waste of manpower and material resources is also caused, certain potential safety hazards exist when the hammer is used for knocking the stop block by people, the hollow shaft is hung for mounting by using a crane, and the potential safety hazards that the hollow shaft is toppled over also exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a tool for disassembling and assembling a locking nut of a hollow shaft of a high-speed rail wheel rolling mill, which realizes the automatic control of the disassembling and assembling of the locking nut, improves the disassembling and assembling efficiency, ensures that the disassembling and assembling are safer and more reliable, reduces the loss rate of spare parts in the disassembling and assembling process and saves the cost.
In order to achieve the purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: high-speed railway wheel rolling machine hollow shaft lock nut dismouting frock includes prevents with hollow shaft matched with and changes the positioning seat, prevent being provided with driving cylinder on the positioning seat, driving cylinder rotates with the one end of rotor arm and links to each other, the other end of rotor arm pass through ratchet pawl mechanism with a plurality of keyway on the lock nut peripheral direction cooperate.
The anti-rotation positioning seat comprises a positioning seat body, one end of the positioning seat body is provided with a positioning groove, the middle of the positioning groove is provided with a stepped shaft, and one end of the hollow shaft is inserted into the positioning groove and matched with the stepped shaft through a connecting key.
The other end of the positioning seat body is provided with a mounting table, and one end of the mounting table is rotatably connected with one end of the driving oil cylinder through a connecting shaft.
The rotating arm comprises a rotating frame body, one end of the rotating frame body is rotatably connected with one end of the driving oil cylinder through a pin shaft, and the other end of the rotating frame body is connected with the locking nut through the ratchet wheel and pawl mechanism.
Ratchet pawl mechanism includes the turret body is kept away from the annular ratchet portion that actuating cylinder's one end set up, annular ratchet portion is provided with a plurality of installation positions of equidistant arrangement along its circumference, link to each other with the pawl through torsional spring and round pin axle in the installation position, the pawl with the last keyway joint cooperation that corresponds of lock nut.
The annular ratchet part is provided with a plurality of baffle tables arranged at intervals along the circumferential direction of the annular ratchet part, the side surfaces of the baffle tables are obliquely arranged, the installation position is formed between every two adjacent baffle tables, and one end of the installation position is rotationally connected with the ratchet.
The upper end surface of the annular ratchet part is detachably connected with an annular pressing plate, and the annular pressing plate is blocked above the installation position.
The pawl comprises a pawl body, the side face of the pawl body comprises a front end face, a rear end face, a sliding face and a stopping face, the front end face and the rear end face are arranged on two sides of the pawl body, the rear end face is close to one end of the blocking table, the rear end face is connected with the front end face through the sliding face and the stopping face, and the stopping face is connected with one end of a key groove in the locking nut in an abutting mode.
And an encoder for detecting the stroke of the piston is arranged in one end of the driving oil cylinder.
The utility model has the beneficial effects that:
1. according to the utility model, the hollow shaft is positioned by the designed anti-rotation positioning seat, the rotating arm is driven to rotate by the driving oil cylinder, so that the ratchet wheel and pawl mechanism rotates to drive the locking nut to rotate to finish the disassembling and assembling actions, the automatic control of the disassembling and assembling process of the locking nut is realized, the disassembling and assembling efficiency and the disassembling and assembling safety are improved, the damage to spare parts is reduced, and the replacement cost is reduced.
2. According to the utility model, the annular ratchet part is arranged at one end of the rotating arm, the installation positions are arranged at equal intervals along the circumferential direction, the pawl is rotatably connected to each installation position, so that the pawl is clamped and matched with the corresponding key groove on the locking nut, the rotating arm can be rotated by the driving of the driving oil cylinder, so that the plurality of pawls are driven to rotate to enable the locking nut to rotate, the piston in the driving oil cylinder returns after reaching a certain stroke, the pawl is clamped into the corresponding key groove on the locking nut after rotating reversely, the driving oil cylinder continues to perform circulating action, the dismounting and installation precision of the locking nut is high, and the operation is safer and more reliable.
To sum up, this lock nut dismouting frock has realized the automated control of lock nut dismouting, has improved the efficiency of dismouting, makes the dismouting safe and reliable more, has reduced the attrition rate in the spare part dismouting process, has practiced thrift the cost.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic view of a prior art hollow mandrel with a locking nut installed thereon;
FIG. 2 is a schematic view of the present invention in use;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is an exploded view of a portion of a rotor according to the present invention;
FIG. 5 is a top view of the arm portion of the present invention with the annular pressure plate removed;
FIG. 6 is a schematic view of the pawl structure;
the labels in the above figures are: 1. the anti-rotation positioning device comprises a hollow shaft, 2 parts of an anti-rotation positioning seat, 21 parts of a positioning seat body, 22 parts of positioning grooves, 23 parts of a stepped shaft, 24 parts of a connecting key, 25 parts of an installation table, 3 parts of a driving oil cylinder, 4 parts of a rotating arm, 41 parts of a rotating frame body, 5 parts of a ratchet and pawl mechanism, 51 parts of an annular ratchet wheel part, 52 parts of an installation position, 53 parts of a pawl, 531 parts of a pawl body, 532 parts of a front end surface, 533 parts of a rear end surface, 534 parts of a sliding surface, 535 parts of a stopping surface, 54 parts of a stopping table, 6 parts of a locking nut, 61 parts of a key groove, 7 parts of an annular pressing plate and 8 parts of an encoder.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation scheme of the utility model is as follows: as shown in fig. 1 to 3, the tool for disassembling and assembling the locking nut of the hollow shaft of the high-speed rail wheel rolling mill comprises an anti-rotation positioning seat 2 matched with the hollow shaft 1, wherein a driving oil cylinder 3 is arranged on the anti-rotation positioning seat 2, the driving oil cylinder 3 is rotationally connected with one end of a rotating arm 4, and the other end of the rotating arm 4 is matched with a plurality of key grooves 61 in the peripheral direction of the locking nut 6 through a ratchet-pawl mechanism 5.
Specifically, as shown in fig. 3, wherein prevent changeing positioning seat 2 and include positioning seat body 21, the one end of positioning seat body 21 is provided with constant head tank 22, the middle part of constant head tank 22 is provided with shoulder shaft 23, the one end of hollow shaft 1 inserts in constant head tank 22, set up the shoulder hole in the hollow shaft 1, installation connecting key 24 and cooperate with shoulder shaft 23 through connecting key 24 in the shoulder hole, realized vertical location and the location of preventing changeing to hollow shaft 1, avoided lock nut 6 in the empting or the atress of dismouting in-process hollow shaft 1 to rotate, can rotate the dismouting to lock nut 6 smoothly. The other end of positioning seat body 21 is provided with mount table 25, the one end of mount table 25 is passed through the connecting axle and is rotated with the one end of actuating cylinder 3 and link to each other, the other end of actuating cylinder 3 rotates with the one end of rotor arm 4 and is connected, when actuating cylinder 3 moves and drive rotor arm 4 and rotate dismouting lock nut 6, the one end of rotor arm 4 rotates round hollow shaft 1, thereby make actuating cylinder 3 swing round the connecting axle in the certain limit, the smooth of going on of 6 dismouting actions of lock nut has been guaranteed to the rotation connected mode at actuating cylinder 3 both ends.
Specifically, as shown in fig. 2, 4 and 5, the rotating arm 4 includes a rotating frame body 41, one end of the rotating frame body 41 is rotatably connected to one end of the driving cylinder 3 through a pin, and the other end of the rotating frame body 41 is connected to the lock nut 6 through the ratchet and pawl mechanism 5. The ratchet and pawl mechanism 5 comprises an annular ratchet part 51 arranged at one end of the rotating frame body 41 far away from the driving oil cylinder 3, the annular ratchet part 51 is provided with a plurality of installation positions 52 which are arranged at equal intervals along the circumferential direction, the installation positions 52 are connected with pawls 53 through torsion springs and pin shafts, the pawls 53 are in clamping fit with corresponding key slots 61 on the locking nuts 6, when the driving oil cylinder 3 drives the rotating frame body 41 to rotate, so that the ratchet and pawl mechanism 5 rotates clockwise (or anticlockwise), the pawls 53 are clamped with the key slots 61 to drive the locking nuts 6 to rotate to realize disassembly and assembly, when the driving oil cylinder 3 drives the rotating frame body 41 to rotate in the opposite direction, the pawls 53 can slide out of the key slots 61 to enter other key slots 61, thereby avoiding the condition that the unidirectional action cannot finish the disassembly and assembly operation due to the limited stroke of the driving oil cylinder 3, the assembling and disassembling actions can be continuously carried out after the driving oil cylinder 3 reversely acts and returns, and the smooth assembling and disassembling of the locking nut 6 are ensured by the circulation.
The annular ratchet part 51 is provided with a plurality of blocking platforms 54 arranged at intervals along the circumferential direction, the side surfaces of the blocking platforms 54 are arranged in an inclined mode, the installation position 52 is formed between every two adjacent blocking platforms 54, one end of the installation position 52 is rotatably connected with the pawl 53, the pawl 53 is arranged in an inclined mode, under the driving of the driving oil cylinder 3, when the pawl 53 is clamped with the corresponding key groove 61, the pawl 53 rotates, and the side surfaces of the blocking platforms 54 provide the corresponding pawl 53 with tangential force along the circumferential direction of the locking nut 6, so that torsion is provided for the installation and the removal of the locking nut 6.
As shown in fig. 6, the pawl 53 includes a pawl body 531, the side surface of the pawl body 531 includes a front end surface 532, a rear end surface 533, a sliding surface 534 and a stopping surface 535, the front end surface 532 and the rear end surface 533 are disposed at two sides of the pawl body 531, the rear end surface 533 abuts against one end of the stopper 54 to provide a torsion for the dismounting and mounting of the lock nut 6, the rear end surface 533 is connected with the front end surface 532 through the sliding surface 534 and the stopping surface 535, the stopping surface 535 is connected with one end of the key groove 61 on the lock nut 6 in an abutting manner, the stopping surface 535 is a stressed surface when the lock nut 6 is dismounted and mounted, when the driving cylinder 3 returns after a certain stroke, the pawl 53 is separated from the key groove 61, wherein the sliding surface 534 slides along the periphery of the lock nut 6, therefore, the driving cylinder 3 performs a cyclic telescopic action according to the set stroke to realize the smooth dismounting and mounting of the lock nut 6.
As shown in fig. 3, in order to monitor the stroke of the drive cylinder 3, an encoder 8 for detecting the stroke of the piston is built in one end of the drive cylinder 3, and the encoder 8 is electrically connected to a control valve on a control oil path of the drive cylinder 3 through a PLC, so that the drive cylinder 3 can perform a cyclic expansion and contraction operation according to a set stroke. As shown in fig. 4, in order to avoid the problem of the pawl 53 being tilted up during the rotation process by the driving of the driving cylinder 3, the annular pressure plate 7 is detachably connected to the upper end surface of the annular pawl portion 51, and the annular pressure plate 7 is stopped above the mounting position 52. The rotating arm 4 is provided with lightening holes, so that the problem that the weight of the rotating arm 4 is heavy to increase the dismounting load is solved.
The working principle of the dismounting tool is as follows:
the operation steps when mounting the locknut 6 are as follows:
step 1: the connecting key 24 is arranged on the stepped shaft 23, the hollow shaft 1 is lifted and inserted into the positioning groove 22 of the anti-rotation positioning seat 2, so that the stepped hole in the hollow shaft 1 is matched with the stepped shaft 23 and is connected through the connecting key 24, and the locking nut 6 is prevented from toppling or stressed and rotating the hollow shaft 1 in the dismounting process.
Step 2: one end of the driving oil cylinder 3 is rotatably connected with the mounting platform 25 through a connecting shaft, one end of the rotating arm 4 close to the ratchet wheel and pawl mechanism 5 is sleeved at one end of the hollow shaft 1, a plurality of circumferential pawls 53 are matched with key grooves 61 at corresponding positions on the locking nuts 6, the other end of the rotating arm 4 is rotatably connected with the other end of the driving oil cylinder 3 through a pin shaft, and the driving oil cylinder 3 and the rotating arm 4 are in the same plane.
And 3, feeding oil into a rodless cavity of the driving oil cylinder 3 to enable the piston rod to push the rotating arm 4 to rotate, extruding the rear end surface 533 of the pawl 53 by the end surface of the baffle table 54 on the annular pawl part 51, extruding the end surface of the key groove 61 of the locking nut 6 by the stopping surface 535 of the pawl 53 to drive the locking nut 6 to rotate for installation, and stopping feeding oil into the rodless cavity of the driving oil cylinder 3 when an encoder 8 arranged in the driving oil cylinder 3 detects that the stroke of the piston rod is a set stroke, namely the rotating arm 4 drives the locking nut 6 to rotate by a set angle.
And 4, step 4: when the encoder 8 of the driving oil cylinder 3 detects that the piston rod returns to the original point, the stopping surface 535 of the pawl 53 enters the next key groove 61 of the locking nut 6, namely, when the ratchet rack rotates reversely by a set angle, the driving oil cylinder 3 has a rod cavity to stop oil feeding.
And 5: and repeating the step 3 and the step 4 again until the installation clearance between the bearing and the retainer ring is less than 0.5mm, stopping the work of the driving oil cylinder 3, completing the installation of the locking nut 6, designing an overflow valve in a hydraulic loop of the driving oil cylinder 3, and protecting the hydraulic system by the overflow valve if the abnormal driving force exceeds the installation maximum set value when the driving oil cylinder 3 drives the ratchet-pawl mechanism 5 to install the locking nut 6.
Step 6: and when another locking nut 6 is installed, repeating the steps 3, 4 and 5 until the driving force of the hydraulic circuit for driving the oil cylinder 3 to work exceeds a set value, namely the overflow valve overflows, stopping the operation of the driving oil cylinder 3, and completing the installation of the locking nut 6.
The principle of the operation steps for detaching the lock nuts 6 is the same as that for mounting, except that the rotating arm 4 is reversely mounted so that the annular pressing plate 7 faces downward, and the two lock nuts 6 can be smoothly detached according to the above steps for mounting.
To sum up, this lock nut dismouting frock has realized the automated control of lock nut dismouting, has improved the efficiency of dismouting, makes the dismouting safe and reliable more, has reduced the attrition rate in the spare part dismouting process, has practiced thrift the cost.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (9)
1. The utility model provides a high-speed railway wheel rolling machine hollow shaft lock nut dismouting frock which characterized in that, includes the positioning seat that prevents changeing with hollow shaft matched with, prevent being provided with driving cylinder on the positioning seat that changes, driving cylinder rotates with the one end of rotor arm and links to each other, the other end of rotor arm pass through ratchet pawl mechanism with a plurality of keyway on the lock nut peripheral direction cooperate.
2. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 1, characterized in that: the anti-rotation positioning seat comprises a positioning seat body, one end of the positioning seat body is provided with a positioning groove, the middle of the positioning groove is provided with a stepped shaft, and one end of the hollow shaft is inserted into the positioning groove and matched with the stepped shaft through a connecting key.
3. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 2, characterized in that: the other end of the positioning seat body is provided with a mounting table, and one end of the mounting table is rotatably connected with one end of the driving oil cylinder through a connecting shaft.
4. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 1, characterized in that: the rotating arm comprises a rotating frame body, one end of the rotating frame body is rotatably connected with one end of the driving oil cylinder through a pin shaft, and the other end of the rotating frame body is connected with the locking nut through the ratchet wheel and pawl mechanism.
5. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 4, characterized in that: ratchet pawl mechanism includes the turret body is kept away from the annular ratchet portion that actuating cylinder's one end set up, annular ratchet portion is provided with a plurality of installation positions of equidistant arrangement along its circumference, link to each other with the pawl through torsional spring and round pin axle in the installation position, the pawl with the last keyway joint cooperation that corresponds of lock nut.
6. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 5, characterized in that: the annular ratchet part is provided with a plurality of baffle tables arranged at intervals along the circumferential direction of the annular ratchet part, the side surfaces of the baffle tables are obliquely arranged, the installation position is formed between every two adjacent baffle tables, and one end of the installation position is rotationally connected with the ratchet.
7. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 5, characterized in that: the upper end surface of the annular ratchet part is detachably connected with an annular pressing plate, and the annular pressing plate is blocked above the installation position.
8. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 6, characterized in that: the pawl comprises a pawl body, the side face of the pawl body comprises a front end face, a rear end face, a sliding face and a stopping face, the front end face and the rear end face are arranged on two sides of the pawl body, the rear end face is close to one end of the blocking table, the rear end face is connected with the front end face through the sliding face and the stopping face, and the stopping face is connected with one end of a key groove in the locking nut in an abutting mode.
9. The high-speed rail wheel mill hollow shaft lock nut dismounting tool according to claim 1, characterized in that: and an encoder for detecting the stroke of the piston is arranged in one end of the driving oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204998.5U CN215616322U (en) | 2021-09-13 | 2021-09-13 | High-speed railway wheel rolling mill hollow shaft lock nut dismouting frock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122204998.5U CN215616322U (en) | 2021-09-13 | 2021-09-13 | High-speed railway wheel rolling mill hollow shaft lock nut dismouting frock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215616322U true CN215616322U (en) | 2022-01-25 |
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ID=79915272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122204998.5U Active CN215616322U (en) | 2021-09-13 | 2021-09-13 | High-speed railway wheel rolling mill hollow shaft lock nut dismouting frock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215616322U (en) |
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2021
- 2021-09-13 CN CN202122204998.5U patent/CN215616322U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 243000, No. 700, Yinhuang East Road, Maanshan economic and Technological Development Zone, Maanshan City, Anhui Province Patentee after: Baowu Group Magang Rail Transit Material Technology Co.,Ltd. Country or region after: China Address before: 243000, No. 700, Yinhuang East Road, Maanshan economic and Technological Development Zone, Maanshan City, Anhui Province Patentee before: Baowu group Magang rail transit Material Technology Co.,Ltd. Country or region before: China |