CN217620376U - Tapered roller bearing drawing device - Google Patents
Tapered roller bearing drawing device Download PDFInfo
- Publication number
- CN217620376U CN217620376U CN202221648933.8U CN202221648933U CN217620376U CN 217620376 U CN217620376 U CN 217620376U CN 202221648933 U CN202221648933 U CN 202221648933U CN 217620376 U CN217620376 U CN 217620376U
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- roller bearing
- tapered roller
- hole
- spring
- claw
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Abstract
The utility model discloses a tapered roller bearing draw-off gear, include: a supporting disk, wherein an inner screw hole is arranged in the supporting disk; the plurality of pulling claws are circumferentially distributed around the supporting disc, and the top end of each pulling claw is hinged with the supporting disc; the bottom end of each pulling claw is provided with a hooking platform; after each pulling claw is inserted into a gap between adjacent rollers of the tapered roller bearing, the hooking platform hooks the upper edge of an inner ring raceway of the tapered roller bearing; one end of each spring is hooked on a proper position in the middle of each pull claw, and the other end of each spring is hooked on a pull ring; an ejector rod penetrating hole is formed in the pull ring, and the pull ring is located between the supporting disc and the tapered roller bearing; the ejector rod is provided with a section of external thread, the external thread of the ejector rod is screwed through the internal thread hole on the supporting disk and extends through the ejector rod penetrating hole on the pull ring to act in the central hole of the shaft for mounting the tapered roller bearing. The utility model relates to a rationally, convenient operation can demolish labour saving and time saving to tapered roller bearing fast.
Description
Technical Field
The utility model relates to a bearing dismantlement technical field, in particular to tapered roller bearing draw-off gear.
Background
The tapered roller has wide application and long service life. When the tapered roller bearing is damaged, the tapered roller bearing needs to be replaced. Because the inner ring of the tapered roller bearing is tapered, a good acting point cannot be found from the outside, and the tapered roller bearing cannot be directly drawn by a three-jaw puller. The traditional replacement method is to cut off the bearing retainer by a cutting machine, take out all rollers and pull out the inner ring of the bearing by a three-jaw puller, which wastes time and labor.
Therefore, the chinese utility model patent publication No. CN212600068U discloses a tapered roller bearing dismounting device, which comprises a tubular base and a tensioning cylinder, wherein an outer thread is provided on an outer peripheral wall of a lower portion of the tensioning cylinder, an inner thread is provided on an inner peripheral wall of an upper portion of the base, and the tensioning cylinder and the base are connected through the outer thread and the inner thread; the inner peripheral wall of the lower part of the tensioning cylinder is a conical surface, a plurality of drawing blocks are circumferentially arranged in an inner cavity of the lower part of the tensioning cylinder, a gap is reserved between every two adjacent drawing blocks, the outer side surface of each drawing block is matched with the conical surface of the tensioning cylinder, and an elastic tensioning device for pushing the outer side surface of each drawing block to be attached to the inner peripheral wall of the tensioning cylinder is arranged inside each drawing block; the bottom of each drawing block is respectively provided with an inward-protruding drawing step, the bottom of the base is provided with an annular limiting step in an inward protruding mode, and the inner diameter of the limiting step is smaller than that of the bottom end of the tensioning cylinder. When the tool works, firstly, a bearing outer ring is detached, then each drawing block is sleeved on a rolling element of a tapered roller bearing, a drawing step at the bottom of each drawing block hooks the rolling element of the tapered roller bearing, then a base is fixed, a tensioning cylinder is screwed, under the matching of the conical surface of the tensioning cylinder and the outer side surface of each drawing block, the conical surface of the tensioning cylinder extrudes the drawing block to gradually compress the rolling element of the tapered roller bearing, finally the rolling element is tightly embraced, then the base is screwed until the limiting step at the bottom is contacted with the bottom end of the drawing block, the conical roller bearing detaching tool is installed, and then the tapered roller bearing is detached by connecting a matched pushing tool at the upper end of the tensioning cylinder to push a shaft head sleeved in the tapered roller bearing.
Chinese utility model patent grant publication No. CN209158265U discloses a conical bearing dismantles frock, including first dismantlement body and with first dismantlement body set up relatively, be used for dismantling the body with first dismantlement body along the second that radially presss from both sides tight conical bearing roller, first dismantlement body and second are dismantled the body and are all including along the axial set up, be used for wrapping the dismantlement groove of conical bearing roller and locate the lateral wall of dismantling the groove, be used for with the conical bearing roller complex predetermine the cone angle, first dismantlement body is dismantled the body with the second and is passed through coupling assembling fixed connection in order to lock the conical bearing roller. This patent will be demolishd the bearing inner race at first, then through pressing from both sides tight conical bearing roller, can increase conical bearing's dismantlement space to can be convenient for conical bearing's dismantlement, this patent needs increase the dismantlement groove on conical bearing roller simultaneously.
Chinese utility model patent publication No. CN203485121U discloses a tapered roller bearing puller, including screw rod, supporting seat, cushion. One end of the screw rod is provided with a hexagonal rod head, and the other end of the screw rod is provided with a conical head; the cushion block is provided with a conical concave cavity matched with the conical head; the supporting seat consists of a cross beam and supporting rods arranged at two ends of the cross beam, the outer ends of the supporting rods are provided with supporting seat flanges, and the supporting seat flanges are provided with cups; the interior limit of cup upper portion is equipped with support flange assorted recess, and the interior limit of cup lower part is equipped with the cup flange, and the cup is by support flange and groove connection with the supporting seat. The patent also removes the bearing outer ring firstly, then adopts the cup flanges of the left cup and the right cup to fasten on the bearing frame of the tapered roller bearing, and the structure is more complex.
Chinese utility model patent publication No. CN201077056Y discloses a tapered roller bearing puller, wherein an inner sleeve is composed of a left half inner sleeve and a right half inner sleeve which are spliced together, the bottoms of the left half inner sleeve and the right half inner sleeve are respectively provided with a semi-annular base, and the two semi-annular bases can be spliced together to form an annular base; the outer wall of the inner sleeve is provided with a positioning ring and is sleeved with an outer sleeve, the top end of the left half inner sleeve is provided with a boosting handle, the right half inner sleeve is provided with a positioning pin corresponding to the boosting handle, the top ends of the left half inner sleeve and the right half inner sleeve are respectively provided with a top plate, a cross bar corresponding to the top plate is arranged in the inner sleeve, a bolt is arranged on the cross bar, and a base plate corresponding to the bolt is further arranged on the cross bar. The patent also removes the bearing outer ring first, then hooks the annular base with the tapered roller to remove the tapered bearing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough and provide a simple structure and firm to above-mentioned prior art exists, need not to demolish the bearing inner race under the condition, directly with tapered roller bearing draw-off gear that the epaxial drawing of tapered roller bearing got off.
In order to achieve the above object, the tapered roller bearing drawing device of the present invention includes:
the supporting plate is internally provided with an inner threaded hole;
the plurality of pulling claws are circumferentially distributed around the supporting disc, and the top end of each pulling claw is hinged with the supporting disc; a hook platform is arranged at the bottom end of each pull claw; after each pull claw is inserted into a gap between adjacent rollers of the tapered roller bearing, the hooking platform hooks the upper edge of an inner ring raceway of the tapered roller bearing;
one end of each spring is hooked on a proper position in the middle of each pull claw, and the other end of each spring is hooked on a pull ring; a push rod penetrating hole is formed in the pull ring, and the pull ring is located between the supporting disc and the tapered roller bearing;
and the ejector rod is provided with a section of external thread, the external thread of the ejector rod is screwed through the internal thread hole in the supporting disk and extends through the ejector rod penetrating hole in the pull ring to act in a central hole of a shaft for mounting the tapered roller bearing.
In a preferred embodiment of the present invention, a plurality of U-shaped bosses with the same number as the pulling claws are circumferentially arranged on the outer periphery of the supporting disk; a U-shaped groove is arranged in each U-shaped boss, and first coaxial hinge holes are formed in the groove walls on the two sides of each U-shaped groove; and a second hinge hole is formed in the top of each pulling claw, the top of each pulling claw is embedded into the U-shaped groove of each U-shaped boss, a bolt penetrates through the first hinge holes in the groove walls on the two sides of the U-shaped groove of each U-shaped boss and the second hinge hole in the top of each pulling claw, and then the pulling claws are locked by nuts, so that the top end of each pulling claw can be hinged with the supporting plate.
In a preferred embodiment of the present invention, the inner diameter of the first hinge hole and the inner diameter of the second hinge hole are both larger than the outer diameter of the bolt.
In a preferred embodiment of the present invention, first spring pull holes having the same number as the springs are circumferentially arranged at positions of the pull ring adjacent to the outer peripheral edge thereof, a second spring pull hole is provided at a suitable position in the middle of each pull claw, one end of each spring is hooked in the second spring pull hole of each pull claw, and the other end of each spring is hooked in each first spring pull hole of the pull ring.
In a preferred embodiment of the present invention, the spring is a tension spring.
In a preferred embodiment of the present invention, a position of each pulling claw adjacent to the hooking platform is smaller than a width dimension of an upper middle portion of the pulling claw parallel to a radial direction of the tapered roller bearing; the width of the position, close to the hooking platform, of each pulling claw, in parallel to the radial line direction of the tapered roller bearing, is connected with the width of the middle upper part of each pulling claw, in parallel to the radial line direction of the tapered roller bearing, through an inclined plane.
In a preferred embodiment of the present invention, a surface of the hooking platform contacting with the upper edge of the inner race of the tapered roller bearing is an arc surface.
In a preferred embodiment of the present invention, an end of the carrier rod acting in the center hole of the shaft for mounting the tapered roller bearing is tapered.
In a preferred embodiment of the present invention, a hexagonal head is fixed to the other end of the jack, which is away from the end that acts in the center hole of the shaft for mounting the tapered roller bearing.
Since the technical scheme as above is used, the utility model discloses need not demolish the bearing inner race, but directly draw the platform through the adoption and collude the top edge that the tapered roller bearing inner race raceway was caught on, the ejector pin top is downthehole at the centre of axle, rotates the ejector pin, can drive the supporting disk motion, and then drives and draw the claw motion, with the whole dismantlement of follow epaxial of tapered roller bearing.
The utility model discloses drawing the in-process, the spring provides certain radial pulling force, can prevent to draw the claw slippage.
The utility model discloses a bearing drawing device has increased and has drawn claw quantity, has improved the area of contact with the bearing inner circle, draws the process stable, reliable.
The utility model provides a pair of tapered roller bearing draw-off gear simple structure, reasonable in design, convenient operation can demolish labour saving and time saving to tapered roller bearing fast.
Drawings
Fig. 1 is a schematic diagram of a state of the tapered roller bearing drawing device of the present invention when drawing the tapered roller bearing.
Fig. 2 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a sectional view B-B of fig. 2.
Fig. 4 is a schematic structural diagram of the tapered roller bearing drawing device of the present invention.
Fig. 5 is a schematic view of the structure of the support plate of the present invention.
Fig. 6 is a schematic view of the structure of the pulling claw of the present invention.
Fig. 7 is a schematic view of the pull ring structure of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
the utility model discloses a tapered roller bearing draw-off gear, as shown in fig. 1 to 7, draw claw 4, a pull ring 3, eight springs 7, eight bolts 2 and eight nuts 6 including a supporting disk 1, a ejector pin 5, eight.
Referring to fig. 5 in particular, the support plate 1 is a circular support plate (although not limited to a circular shape, it may have other shapes), and an inner threaded hole 1a is provided in the center of the support plate 1. The periphery of the supporting disk is uniformly provided with U-shaped bosses 1b with the same octant structure in the circumferential direction; a U-shaped groove 1c is arranged in each U-shaped boss 1b, and coaxial hinged holes 1f and 1g (the first hinged hole) are arranged in the horizontal direction of groove walls 1d and 1e at the two sides of the U-shaped groove 1 c; the inner diameters of the hinged holes 1f and 1g are larger than the outer diameter of the bolt 2.
Referring to fig. 6 in particular, a hinged hole 4a (the second hinged hole) is formed at the top of each pulling claw 4, a spring pulling hole 4b (the second spring pulling hole) is formed at a proper middle position, a hooking platform 4C is arranged at the bottom end, and the inner diameter of the second hinged hole 4a is also larger than the outer diameter of the bolt 2.
Eight draw claw 4 around 1 circumference equipartition of supporting disk and each draw the top of claw 4 and support disk 1 articulated, specifically are: the top of each pulling claw 4 is embedded into the U-shaped groove 1c of each U-shaped boss 1b, a bolt 2 penetrates through the hinge holes 1f and 1g on the groove walls at the two sides of the U-shaped groove 1c of each U-shaped boss 1b and the hinge hole 4a at the top of each pulling claw 4, and then a nut 6 is used for locking, so that the top end of each pulling claw 4 is hinged with the supporting plate 1. Each pulling claw 4 can rotate along the outer circle of the bolt 2.
The width 4d of the position of each pulling claw 4 close to the hooking platform 4c and parallel to the radial line direction of the tapered roller bearing 9 is smaller than the width 4e of the middle upper part of each pulling claw 4 and parallel to the radial line direction of the tapered roller bearing; the width 4d of each pulling claw 4 close to the hooking platform 4c and parallel to the radial line direction of the tapered roller bearing 9 is connected with the width 4e of the middle upper part of the pulling claw 4 and parallel to the radial line direction of the tapered roller bearing 9 through an inclined plane 4f, so that the hooking platform 4c of the pulling claw 4 is conveniently inserted into a gap 9b between adjacent rollers 9a of the tapered roller bearing 9. After the hooking base 4c is inserted into the gap 9b between the adjacent rollers 9a of the tapered roller bearing 9, the hooking base 4c hooks the upper edge 9d of the inner race 9c of the tapered roller bearing 9. The surface 4g of the hooking platform 4c contacting with the upper edge 9d of the inner ring raceway 9c of the tapered roller bearing 9 is a circular arc surface.
Referring to fig. 7 in particular, the pull ring 3 is located between the support plate 1 and the tapered roller bearing 9, a mandrel passing hole 3a is formed in the center of the pull ring 3, and eight spring pulling holes 3b (the first spring pulling hole) are circumferentially and uniformly distributed at a position of the pull ring 3 adjacent to the outer periphery thereof.
The springs 7 are tension springs (certainly, the springs are not limited to tension springs), one end of each spring 7 is hooked in the spring pulling hole 4b of each pulling claw 4, the other end of each spring 7 is hooked in each spring pulling hole 3b of the pulling ring 3, and the outward opening angles of the eight pulling claws 3 are limited by the eight springs 7.
An external thread 5a is provided on the ram 5, the external thread 5a of the ram 5 screwing through the internal threaded hole 1a on the support disc 1 and extending through the ram through hole 3a on the pull ring 3 acting in the central hole 8a of the shaft 8 for mounting the tapered roller bearing 9. The ram 5 limits the degree of freedom of the tab 3 in the horizontal direction.
One end 5b of the jack 5 acting on the center hole 8a of the shaft 8 for mounting the tapered roller bearing 9 is tapered, and a hexagonal head 5d (of course, a triangular head, a quadrangular head, a pentagonal head, or a heptagonal head or more) is fixed to the other end 5c of the jack 5 away from the end 5b acting on the center hole 8a of the shaft 8 for mounting the tapered roller bearing 9, so that the hexagonal head 5d can be easily locked by an open end wrench to rotate.
The working principle of the utility model is as follows:
when the tapered roller bearing 9 is pulled, firstly, the opening angles of the eight pulling claws 4 are adjusted, so that the enclosed diameter of the hooking platforms 4c at the inner sides of all the pulling claws 4 is matched with the outer diameter of an inner ring of the tapered roller bearing 9 to be disassembled, the eight pulling claws 4 are inserted into the tapered roller bearing 9 along gaps 9b among rollers 9a of the tapered roller bearing 9, and the pulling claws 4 tightly clamp the upper edge 9d of an inner ring raceway 9c of the tapered roller bearing 9 under the action of the pulling force of the spring 7; the hexagonal head 5d of the ejector rod 5 is clamped by means of an open spanner, the ejector rod 5 is rotated, one end 5b of the conical ejector head of the ejector rod 5 abuts against a central hole 8a of the shaft 8, the ejector rod 5 is continuously rotated, spiral lifting force is generated between the ejector rod 5 and the supporting plate 1, the spiral lifting force is transmitted to the pull claw 4 through the supporting plate 1, the hook table 4c at the tail end of the pull claw 4 hooks the upper edge 9d of the inner ring raceway 9c of the tapered roller bearing 9, and the inner ring of the tapered roller bearing 9 and the shaft 8 are forced to move relatively until being separated.
Claims (9)
1. A tapered roller bearing drawing device characterized by comprising:
the supporting plate is internally provided with an inner screw hole;
the plurality of pulling claws are circumferentially distributed around the supporting disc, and the top end of each pulling claw is hinged with the supporting disc; a hook platform is arranged at the bottom end of each pull claw; after each pulling claw is inserted into a gap between adjacent rollers of the tapered roller bearing, the hooking platform hooks the upper edge of an inner ring raceway of the tapered roller bearing;
one end of each spring is hooked on a proper position in the middle of each pull claw, and the other end of each spring is hooked on a pull ring; a push rod penetrating hole is formed in the pull ring, and the pull ring is located between the supporting disc and the tapered roller bearing;
and the ejector rod is provided with a section of external thread, the external thread of the ejector rod is screwed through the internal thread hole on the supporting disk and extends through the ejector rod penetrating hole on the pull ring to act in a central hole of a shaft for mounting the tapered roller bearing.
2. The tapered roller bearing drawing device as claimed in claim 1, wherein a plurality of U-shaped bosses are circumferentially arranged on an outer peripheral edge of the supporting disk, the number of the U-shaped bosses being equal to the number of the drawing claws; a U-shaped groove is arranged in each U-shaped boss, and first coaxial hinge holes are formed in the groove walls on the two sides of each U-shaped groove; and a second hinge hole is formed in the top of each pull claw, the top of each pull claw is embedded into the U-shaped groove of each U-shaped boss, a bolt penetrates through the first hinge holes in the groove walls on the two sides of the U-shaped groove of each U-shaped boss and the second hinge hole in the top of each pull claw, and then the pull claws are locked by nuts, so that the top ends of the pull claws are hinged with the supporting plate.
3. The tapered roller bearing pulling device according to claim 2, wherein the inner diameters of the first hinge hole and the second hinge hole are both larger than the outer diameter of the bolt.
4. The tapered roller bearing drawing device as claimed in claim 1, wherein the pull ring has first spring drawing holes arranged circumferentially at positions adjacent to an outer peripheral edge thereof, the number of the first spring drawing holes being equal to the number of the springs, a second spring drawing hole is provided at a suitable position in a middle of each of the drawing claws, one end of the spring is hooked in the second spring drawing hole of each of the drawing claws, and the other end of the spring is hooked in each of the first spring drawing holes of the pull ring.
5. The tapered roller bearing pulling apparatus as claimed in claim 1, wherein said spring is a tension spring.
6. The tapered roller bearing drawing device as claimed in claim 1, wherein a width dimension of each of the drawing claws at a position adjacent to the hooking step in a direction parallel to a radial direction of the tapered roller bearing is smaller than a width dimension of an upper middle portion of the drawing claw in a direction parallel to a radial direction of the tapered roller bearing; the width of the position, close to the hooking platform, of each pulling claw, in parallel to the radial line direction of the tapered roller bearing, is connected with the width of the middle upper part of each pulling claw, in parallel to the radial line direction of the tapered roller bearing, through an inclined plane.
7. The tapered roller bearing drawing device as claimed in claim 1, wherein a surface of the hooking platform contacting with an upper edge of the tapered roller bearing inner ring raceway is a circular arc surface.
8. A tapered roller bearing drawing device as claimed in any one of claims 1 to 7, wherein the end of the carrier rod acting within the central bore of the shaft for mounting the tapered roller bearing is tapered.
9. A tapered roller bearing drawing device as claimed in claim 8, wherein a hexagonal head is fixed to the other end of the jack remote from the one end acting in the center hole of the shaft for mounting the tapered roller bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221648933.8U CN217620376U (en) | 2022-06-28 | 2022-06-28 | Tapered roller bearing drawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221648933.8U CN217620376U (en) | 2022-06-28 | 2022-06-28 | Tapered roller bearing drawing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217620376U true CN217620376U (en) | 2022-10-21 |
Family
ID=83631025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221648933.8U Active CN217620376U (en) | 2022-06-28 | 2022-06-28 | Tapered roller bearing drawing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217620376U (en) |
-
2022
- 2022-06-28 CN CN202221648933.8U patent/CN217620376U/en active Active
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