CN103586674A - Single-end pressing fit machine for bearing inner ring of rear axle hub - Google Patents
Single-end pressing fit machine for bearing inner ring of rear axle hub Download PDFInfo
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- CN103586674A CN103586674A CN201310595317.XA CN201310595317A CN103586674A CN 103586674 A CN103586674 A CN 103586674A CN 201310595317 A CN201310595317 A CN 201310595317A CN 103586674 A CN103586674 A CN 103586674A
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- bearing
- rear axle
- piston
- oil cylinder
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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Abstract
The invention relates to bearing pressing fit equipment, and discloses a single-end pressing fit machine for a bearing inner ring of a rear axle hub. The single-end pressing fit machine for the bearing inner ring of the rear axle hub comprises a composite oil cylinder, an expansion core mechanism, a transition connection disc, a bearing pressure head used for pressing the bearing inner ring of the hub, and a hydraulic station used for providing power for the composite oil cylinder, wherein the hydraulic station is connected with the composite oil cylinder through an oil pipe; the composite oil cylinder is flexibly connected with a guide rail through a balance crane, the expansion core mechanism is located in a shaft pipe of a rear axle assembly, the bearing pressure head is located outside the shaft pipe of the rear axle assembly, and the expansion core mechanism and the bearing pressure head are connected with the same end of the composite oil cylinder. According to the single-end pressing fit machine for the bearing inner ring of the rear axle hub, the bearing inner ring does not need to be heated, the energy consumption is lowered, the machining cost is lowered, the pressing fit efficiency is improved largely, and meanwhile the single-end pressing fit machine for the bearing inner ring of the rear axle hub is compact in structure, convenient to operate, easy to machine, reliable in performance and high in universality, and has good popularization and use prospects in the vehicle axle industry.
Description
Technical field
The present invention relates to a kind of bearing press mounting equipment, particularly a kind of rear axle hub bearing inner race single head pressing machine.
Background technology
The assembly method of rear axle hub bearing inner race has two kinds at present, and a kind of is to adopt the assembly technology expanding with heat and contract with cold, and first bearing inner race is heated, and then the bearing inner race heating is hung up to central siphon, and cover upper bearing (metal) pressure cylinder, knocks bearing, is pressed into bearing position.During batch production, use this assembly method, need manually in advance a large amount of bearings to be put into the heating of heating railway carriage or compartment, time is long, and efficiency is low, and labour intensity is large, and consumes a large amount of electric energy.This kind of each the assembling 40 seconds consuming time of assembling method, power consumption is 10kw/h.Another kind method is double end cold-press process,, without heating bearing inner race, adopts hydraulic pressure-mounting machine two synchronous press mounting.But because whole root bridge housing assy length is longer, be limited to the length of axle case assy, when double end press-fits, whole pressing machine just must be done more heavierly, takies larger site area, and dangerous, maximum defect is while press-fiting disc type bridge, to be difficult for location, press-fits the time longer, and efficiency is lower.Granted publication number is: CN202292060U discloses a kind of bearing inner race pressing machine, the schematic diagram providing according to this patent application, the principle of this device work is, fixed cover is placed in workpiece, the driving force providing by cylinder, drive tension mandrel to move backward, and then driving is connected wedge with mandrel and moves backward, wedge is the structural member of triangular prism, inclined-plane by wedge makes slipper push tensioner steel ball outwards open along the endoporus of fixed cover, the external diameter now forming after tensioner steel ball spreading is larger than central siphon internal diameter, thereby this pressing machine mandrel is partly stuck in the transition arc place of the hub axle tube inwall of workpiece, the power drive pressing machine finally providing by apparatus for pressurizing gas, liquid is pushing away pressure head and is travelling forward, head on hub bearing inner ring and form counter-force effect with the mandrel that is stuck in central siphon transition arc place, and then realize press-fiting of hub bearing inner ring.This pressing machine Tensioning structure drives by air pressure, and conventionally the pressure ratio of gas exerts is more unstable, and strength not as oil pressure large; And this device press-fit part and lock portion separate, tension mechanism is prismatic body, this structure is difficult for processing, and be to adopt steel ball tensioner, need to stretch into central siphon to arc transition place, steel ball and central siphon contact area are too small, tensioner scope is too small, cannot feel relieved, applicable back axle variety range is smaller, and overall structure is longer.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of rear axle hub bearing inner race single head pressing machine is provided, and to solve, the above-mentioned energy consumption that prior art exists is high, efficiency is low, occupied ground is large, operation is inconvenient, be difficult for the weak point of processing, pressure transient.
The technical scheme solving the problems of the technologies described above is: a kind of rear axle hub bearing inner race single head pressing machine, comprise composite oil cylinder, swollen concentric mechanism, transition connecting disc, bearing head for top hub bearing inner race, and be used to composite oil cylinder that the Hydraulic Station of power is provided, described Hydraulic Station is connected with composite oil cylinder by oil pipe, composite oil cylinder flexibly connects by balance crane and guide rail, described swollen concentric mechanism is positioned at the central siphon of rear axle assy, bearing head is positioned at outside the central siphon of rear axle assy, this is swollen concentric mechanism, bearing head is connected with same one end of composite oil cylinder respectively.
Further technical scheme of the present invention is: described composite oil cylinder comprises outer cylinder body, drive end bearing bracket, outer piston, rear end cap, inner casing rear end cap, inner carrier, on described outer cylinder body, be respectively equipped with fuel feed hole and oil outlet, described drive end bearing bracket, rear end cap be arranged on respectively outer cylinder body before, rear two ends, described outer piston is whole workpiece, on the inside and outside wall at piston middle part, be respectively equipped with the piston head of outer shell and the inner casing drive end bearing bracket of inner casing, the external diameter at outer piston two ends is as the piston rod of outer shell, endoporus is as the cylinder part of inner casing, and on outer piston, be provided with the fuel feed hole of inner casing.This outer piston is arranged in outer cylinder body, and the piston rod at outer piston two ends passes respectively the endoporus of forward and backward end cap; Described inner casing rear end cap is arranged on the rear end of outer piston endoporus, this inner casing rear end cap is provided with spill port, described inner carrier one end is that piston head, the other end are piston rod, the piston head of this inner carrier is arranged between the inner casing rear end cap and inner casing drive end bearing bracket in outer piston, and the piston rod of inner carrier stretches out inner casing drive end bearing bracket and is connected with swollen concentric mechanism.
Further technical scheme of the present invention is: described swollen concentric mechanism comprises pull bar, guide cylinder, activity expansion block assembly, capping and the wedge shape push rod that is positioned at activity expansion block assembly, described end, guide cylinder one end is provided with flange, and the guide cylinder other end is provided with described activity expansion block assembly side by side; Described pull bar one end is connected with the piston rod of inner carrier, the pull bar other end passes successively the endoporus of guide cylinder, wedge shape push rod and is connected with the fastening nuts that is positioned at wedge shape push rod one end, described capping is fastenedly connected in the rear end of activity expansion block assembly, and this capping, activity expansion block assembly, guide cylinder are positioned at the central siphon of rear axle assy successively.
Further technical scheme of the present invention is: described wedge shape push rod is provided with at least 4 inclined-planes that are symmetric, α=5～15 °, oblique angle on inclined-plane.
Further technical scheme of the present invention is: described bearing head is the tubular structure with convex shoulder, on the convex shoulder of this bearing head, be symmetrically distributed with at least 2 and be convenient to quick-replaceable arc notch, the convex shoulder of this bearing head is connected with the drive end bearing bracket of composite oil cylinder by transition connecting disc.
Owing to adopting said structure, after the present invention, bridge hub bearing inner ring single head pressing machine compared with prior art, has following beneficial effect:
1. energy consumption is low, efficiency is high:
Due to composite oil cylinder of the present invention, swollen concentric mechanism, transition connecting disc, for the bearing head of top hub bearing inner race, and be used to composite oil cylinder that the Hydraulic Station of power is provided, described swollen concentric mechanism is positioned at the central siphon of rear axle assy, bearing head is positioned at outside the central siphon of rear axle assy, and this is swollen concentric mechanism, bearing head are connected with same one end of composite oil cylinder respectively.When press-fiting, first swollen concentric mechanism is pushed in the central siphon of rear axle assy, the inner carrier of composite oil cylinder moves backward, makes the activity expansion block assembly distending of swollen concentric mechanism, thereby make swollen concentric mechanism and central siphon swelling be shaped as one, and swelling process also can play self centering effect.After swollen concentric mechanism swelling, the ectosome of composite oil cylinder is travelled forward, in the lump bearing head is promoted forward, and then promote hub bearing inner ring and travel forward, finally can realize press-fiting of hub bearing inner ring.Therefore, the present invention without heating bearing inner race, thereby reduced energy consumption, reduced processing cost; And without equipping before work, assembling is average consuming time is only, about 20 seconds, significantly to have improved and press-fited efficiency, has reduced labour intensity, thereby has reduced the cost of enterprise, has improved output and value, has greatly improved the competitiveness of enterprise.
2. compact conformation:
Because the present invention is single head pressing machine, without middle coupling and the hanger bracket of double end propons hydraulic press, its compact conformation, floor space is also less;
In addition, composite oil cylinder of the present invention is that what to adopt is that interior outer shell is fit, and swollen core structure needn't extend into central siphon transition arc place, Anywhere all can swelling at shaft tube inner wall, can greatly reduce the volume of pressing machine.
3. easy to operate, handling ease:
Due to the single single-set operation of this pressing machine, and after pressing machine is in place, as long as start the control button of Hydraulic Station, can press-fit, automaticity is higher, and it is quick that operation is very easy.
In addition, the wedge shape push rod of the swollen concentric mechanism of this pressing machine is provided with at least 4 inclined-planes that are symmetric, and due to what adopt, is symmetrical inclined-plane, four sides, more easily processing, and more easily maintenance.
4. more reliable performance:
What adopt due to the present invention is that hydraulic pressure press-fits, and compares air pressure and press-fits, and its applied pressure is larger, and pressure is more stable; In addition, what adopt due to the wedge shape push rod of the swollen concentric mechanism of this pressing machine is symmetrical inclined-plane, four sides, and contact area is larger, and the tension force of formation is larger, hub bearing inner ring more effectively can be press-fit into place, therefore, more reliable performance of the present invention.
5. highly versatile:
The wedge shape push rod of the swollen concentric mechanism of this pressing machine is provided with at least 4 inclined-planes that are symmetric, due to what adopt, it is symmetrical inclined-plane, four sides, contact area is larger, the tension force forming is larger, and adopt the swollen core structure at four sides can self-centering, the axle center of energy automatic capturing central siphon, therefore, the scope of swelling of the present invention is larger, for central siphon internal diameter and the bearing inner race of different bridge type kinds, if do not conform to, also only need replacing activity expansion block and bearing head, versatility of the present invention is stronger, has good popularizing application prospect in vehicle bridge industry.
Below, in conjunction with the accompanying drawings and embodiments the technical characterictic of bridge hub bearing inner ring single head pressing machine after the present invention is further described.
Accompanying drawing explanation
Fig. 1: the scheme of installation of bridge hub bearing inner ring single head pressing machine after the present invention,
Fig. 2: the structural representation of bridge hub bearing inner ring single head pressing machine after the present invention;
Described in Fig. 3: embodiment mono-, state the structural representation of composite oil cylinder,
Described in Fig. 4: embodiment mono-, state the structural representation of swollen concentric mechanism,
Described in Fig. 5-Fig. 6: embodiment mono-, state the structural representation of bearing head, wherein,
Fig. 5: the main left view of looking cutaway view, Fig. 6: Fig. 5.
In above-mentioned accompanying drawing, the label of each part is as follows:
1-composite oil cylinder, 11-outer cylinder body, 12-drive end bearing bracket,
13-outer piston, 131-piston head, 132-piston rod, 133-inner casing drive end bearing bracket,
14-rear end cap, 15-inner casing rear end cap, 16-inner carrier, 161-piston head,
162-piston rod, 17-suspension ring installing rack,
2-is swollen concentric mechanism, 21-pull bar, 22-guide cylinder, 221-flange,
23-activity expansion block assembly, 24-wedge shape push rod, 25-capping,
3-bearing head, 31-convex shoulder, 32-arc notch,
4-hub bearing inner ring, 5-central siphon, 6-transition connecting disc
7-guide rail, 8-balance crane, 9-control button, 10-Hydraulic Station.
The specific embodiment
Embodiment mono-:
A kind of rear axle hub bearing inner race single head pressing machine, comprise composite oil cylinder 1, swollen concentric mechanism 2, transition connecting disc 6, bearing head 3 for top hub bearing inner race, and be used to composite oil cylinder 1 to provide the Hydraulic Station 10(of power referring to Fig. 2), described Hydraulic Station 10 is connected with composite oil cylinder 1 by oil pipe, composite oil cylinder 1 flexibly connects (referring to Fig. 1) by balance crane 8 and guide rail 7, described swollen concentric mechanism 2 is positioned at the central siphon 5 of rear axle assy, bearing head 3 is positioned at outside the central siphon 5 of rear axle assy, this is swollen concentric mechanism 2, bearing head 3 is connected with same one end of composite oil cylinder 1 respectively, on composite oil cylinder 1, be provided with for controlling the control button 9 of Hydraulic Station 10, by pressing the control button 9 of Hydraulic Station 10, can start Hydraulic Station 10 for composite oil cylinder 1 provides power, 1 pair of bearing inner race of composite oil cylinder is press-fited.
Described composite oil cylinder 1 comprises outer cylinder body 11, drive end bearing bracket 12, outer piston 13, rear end cap 14, inner casing rear end cap 15, inner carrier 16(is referring to Fig. 3), on described outer cylinder body 11, be respectively equipped with fuel feed hole and oil outlet, described drive end bearing bracket 12, rear end cap 14 be arranged on respectively outer cylinder body 11 before, rear two ends, described outer piston 13 is whole workpiece, on the inside and outside wall at piston middle part, be respectively equipped with the piston head 131 of outer shell and the inner casing drive end bearing bracket 133 of inner casing, the external diameter at outer piston 13 two ends is as the piston rod 132 of outer shell, endoporus is as the cylinder part of inner casing, and on outer piston 13, be provided with the fuel feed hole of inner casing.This outer piston 13 is arranged in outer cylinder body 11, and the piston rod 132 at outer piston 13 two ends passes respectively the endoporus of forward and backward end cap; Described inner casing rear end cap 15 is arranged on the rear end of outer piston 13 endoporus, this inner casing rear end cap 15 is provided with spill port, described inner carrier 16 one end are that piston head 161, the other end are piston rod 162, the piston head 161 of this inner carrier is arranged between the inner casing rear end cap 15 and inner casing drive end bearing bracket 133 in outer piston 13, and the piston rod 162 of inner carrier 16 stretches out inner casing drive end bearing bracket 133 and is connected with swollen concentric mechanism 2.
The wedge shape push rod 24(that described swollen concentric mechanism 2 comprises pull bar 21, guide cylinder 22, activity expansion block assembly 23, capping 25 and is positioned at activity expansion block assembly 23 is referring to Fig. 4), described guide cylinder 22 ends, one end are provided with flange 221, and guide cylinder 22 other ends are provided with described activity expansion block assembly 23 side by side; Described pull bar 21 one end are connected with the piston rod 162 of inner carrier 16, and pull bar 21 other ends pass successively the endoporus of guide cylinder 22, wedge shape push rod 24 and are connected with the fastening nuts that is positioned at wedge shape push rod 24 one end; Described wedge shape push rod 24 is provided with 4 inclined-planes that are symmetric, α=10 °, oblique angle on inclined-plane; Described capping 25 is fastenedly connected in the rear end of activity expansion block assembly 23, and this capping 25, activity expansion block assembly 23, guide cylinder 22 are positioned at the central siphon 5 of rear axle assy successively.
Described bearing head 3 is the tubular structure (referring to Fig. 5-Fig. 6) with convex shoulder 31, on the convex shoulder 31 of this bearing head 3, be symmetrically distributed with 3 and be convenient to quick-replaceable arc notch 32, the convex shoulder 31 of this bearing head 3 is connected with the drive end bearing bracket 12 of composite oil cylinder 1 by transition connecting disc 6.
As a kind of conversion of the present embodiment one, the inclined-plane on wedge shape push rod 24 can also be symmetrical 5,6,7,8 ...
As another conversion of the present embodiment one, the oblique angle α on described inclined-plane also can be greater or lesser, generally gets 5～15 °.
As a kind of conversion of the present embodiment one, the quantity of described arc notch 32 can also be 2 or 4,5 ...
After the present invention, the operation principle of bridge hub bearing inner ring single head pressing machine is as follows:
While press-fiting, first swollen concentric mechanism 2 is pushed in the central siphon 5 of rear axle assy, the drive force piston rod 162 providing by Hydraulic Station moves backward with pull bar 21 and wedge shape push rod 24, wedge shape push rod 24 has 4 symmetrical inclined-planes that are 10 ° of angles, inclined-plane by wedge shape push rod 24 make activity expansion block 23 along the endoporus of guide cylinder 22 outwards open, thereby the inwall of swelling central siphon 5, make outer piston 13, inner carrier 16 and swollen concentric mechanism 2 maintain static, then make the outer cylinder body 11 of composite oil cylinder 1, drive end bearing bracket 12 and rear end cap 14 are pushing away bearing head 3 and are travelling forward, and then head on hub bearing inner ring and be press-fit into place.
Claims (6)
1. a rear axle hub bearing inner race single head pressing machine, it is characterized in that: comprise composite oil cylinder (1), swollen concentric mechanism (2), transition connecting disc (6), bearing head (3) for top hub bearing inner race, and be used to composite oil cylinder (1) that the Hydraulic Station (10) of power is provided, described Hydraulic Station (10) is connected with composite oil cylinder (1) by oil pipe, composite oil cylinder (1) flexibly connects by balance crane (8) and guide rail (7), described swollen concentric mechanism (2) is positioned at the central siphon (5) of rear axle assy, bearing head (3) is positioned at outside the central siphon (5) of rear axle assy, this is swollen concentric mechanism (2), bearing head (3) is connected with same one end of composite oil cylinder (1) respectively.
2. rear axle hub bearing inner race single head pressing machine according to claim 1, it is characterized in that: described composite oil cylinder (1) comprises outer cylinder body (11), drive end bearing bracket (12), outer piston (13), rear end cap (14), inner casing rear end cap (15), inner carrier (16), described outer cylinder body is respectively equipped with fuel feed hole and oil outlet on (11), described drive end bearing bracket (12), rear end cap (14) be arranged on respectively outer cylinder body (11) before, rear two ends, described outer piston (13) is whole workpiece, on the inside and outside wall at piston middle part, be respectively equipped with the piston head (131) of outer shell and the inner casing drive end bearing bracket (133) of inner casing, the external diameter at outer piston (13) two ends is as the piston rod (132) of outer shell, endoporus is as the cylinder part of inner casing, and on outer piston (13), be provided with the fuel feed hole of inner casing.
3. this outer piston (13) is arranged in outer cylinder body (11), and the piston rod (132) at outer piston (13) two ends passes respectively the endoporus of forward and backward end cap; Described inner casing rear end cap (15) is arranged on the rear end of outer piston (13) endoporus, this inner casing rear end cap (15) is provided with spill port, described inner carrier (16) one end is that piston head (161), the other end are piston rod (162), the piston head of this inner carrier (161) is arranged between the inner casing rear end cap (15) and inner casing drive end bearing bracket (133) in outer piston (13), and the piston rod (162) of inner carrier (16) stretches out inner casing drive end bearing bracket (133) and is connected with swollen concentric mechanism (2).
4. rear axle hub bearing inner race single head pressing machine according to claim 2, it is characterized in that: described swollen concentric mechanism (2) comprises pull bar (21), guide cylinder (22), activity expansion block assembly (23), capping (25) and the wedge shape push rod (24) that is positioned at activity expansion block assembly (23), described guide cylinder (22) end, one end is provided with flange (221), and guide cylinder (22) other end is provided with described activity expansion block assembly (23) side by side; Described pull bar (21) one end is connected with the piston rod (162) of inner carrier (16), pull bar (21) other end passes successively the endoporus of guide cylinder (22), wedge shape push rod (24) and is connected with the fastening nuts that is positioned at wedge shape push rod (24) one end, described capping (25) is fastenedly connected in the rear end of activity expansion block assembly (23), and this capping (25), activity expansion block assembly (23), guide cylinder (22) are positioned at the central siphon (5) of rear axle assy successively.
5. rear axle hub bearing inner race single head pressing machine according to claim 3, is characterized in that: described wedge shape push rod (24) is provided with at least 4 inclined-planes that are symmetric, α=5～15 °, oblique angle on inclined-plane.
6. according to the rear axle hub bearing inner race single head pressing machine described in claim 2 or 3 or 4, it is characterized in that: described bearing head (3) is the tubular structure with convex shoulder (31), on the convex shoulder (31) of this bearing head (3), be symmetrically distributed with at least 2 and be convenient to quick-replaceable arc notch (32), the convex shoulder (31) of this bearing head (3) is connected with the drive end bearing bracket (12) of composite oil cylinder (1) by transition connecting disc (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595317.XA CN103586674B (en) | 2013-11-21 | 2013-11-21 | Rear axle hub bearing inner race single head pressing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310595317.XA CN103586674B (en) | 2013-11-21 | 2013-11-21 | Rear axle hub bearing inner race single head pressing machine |
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| Publication Number | Publication Date |
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| CN103586674A true CN103586674A (en) | 2014-02-19 |
| CN103586674B CN103586674B (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310595317.XA Active CN103586674B (en) | 2013-11-21 | 2013-11-21 | Rear axle hub bearing inner race single head pressing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104440040A (en) * | 2014-12-01 | 2015-03-25 | 郑州精益达汽车零部件有限公司 | Press for assembling oil seal seat ring, bearing inner ring and axle housing and hydraulic system of press |
| CN110773960A (en) * | 2019-11-01 | 2020-02-11 | 湖南大学 | Automobile hub bearing riveting assembly process method and auxiliary process device thereof |
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| CN202684462U (en) * | 2012-06-13 | 2013-01-23 | 方盛车桥（柳州）有限公司 | Front axle hub bearing inner race press |
| CN203566215U (en) * | 2013-11-21 | 2014-04-30 | 方盛车桥（柳州）有限公司 | Rear axle hub bearing inner ring single-head pressing machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104440040A (en) * | 2014-12-01 | 2015-03-25 | 郑州精益达汽车零部件有限公司 | Press for assembling oil seal seat ring, bearing inner ring and axle housing and hydraulic system of press |
| CN110773960A (en) * | 2019-11-01 | 2020-02-11 | 湖南大学 | Automobile hub bearing riveting assembly process method and auxiliary process device thereof |
| CN110773960B (en) * | 2019-11-01 | 2020-09-25 | 湖南大学 | Automobile hub bearing riveting assembly process method and auxiliary process device thereof |
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| Publication number | Publication date |
|---|---|
| CN103586674B (en) | 2016-04-13 |
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