Vibration reduction multi-layer rubber bearing and preparation mold thereof

Abstract

The damping multilayer rubber bearing comprises an outer sleeve, a plurality of layers of spacers and a core shaft body which are sequentially arranged from outside to inside, and rubber is integrally formed and vulcanized among the outer sleeve, the spacers, the spacers and the core shaft body to form a whole; the rubber fully wraps the multiple spacers and extends to the end face of the outer sleeve. The spacers are arranged to be spherical arc-shaped, and the two symmetrical spacers form a sphere with a gap; the spacers are arranged at equal intervals and unequal heights; and the spacers and the flat surface of the mandrel body are crosswise arranged at an angle of 45 degrees. The mold comprises an integral lower mold, a middle mold and a split upper mold, the integral lower mold is provided with a positioning groove and a positioning pin, and the split upper mold is provided with a positioning groove, a positioning pin and a glue injection hole. The damping multilayer rubber bearing disclosed by the utility model can replace a metal bearing, so that not only is the cost reduced, but also the problem of abnormal sound caused by long-term use of the metal bearing is solved. The die can effectively improve the qualification rate and the production efficiency of the bearing, and ensures the quality and the service life of the bearing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rail transit technical field relates to a nonmetallic rubber bearing for bogie, especially in a kind of damping multilayer rubber bearing and preparation mould thereof. BACKGROUND

[0002] As the product for the connecting rod group of rail transit bogie, with the increase of use frequency, the fault problem is more and more, and serious fault affects the comfort of passengers.

[0003] Metal bearing is used as connecting piece, the main feature is that large angle rotation and torsion can be realized, the functionality is realized, and certain elasticity cannot be provided due to the metal characteristics, in the long-term use process of rail vehicle, the bearing position is easily worn, so that the wear-resistant layer of metal bearing is damaged, gap appears, metal collision and dry grinding occur in the process of vehicle vibration, and the comfort of vehicle is reduced after failure. SUMMARY

[0004] In order to solve the shortcomings and deficiencies existing in the use of existing metal bearing, the utility model discloses a kind of damping multilayer rubber bearing and preparation mould thereof, by reasonably designing bearing structure and integral type glue injection vulcanization mould, the integral type glue injection vulcanization forming of a kind of damping multilayer rubber bearing is realized: rubber is wrapped and extended to the end face of outer sleeve, the spherical arc design of spacer, the full wrapping of spacer rubber, the design of spacer is equidistant unequal height etc.;Integral type vulcanization mould is assembled and cooperated by integral lower mould and split type upper mould and middle module, which can effectively improve the bearing qualification rate and production efficiency, and ensure the quality and service life of bearing.

[0005] To achieve the above object, the technical scheme provided by the utility model is as follows:

[0006] A kind of damping multilayer rubber bearing, including outer sleeve, multilayer spacer and mandrel body sequentially arranged from outside to inside, rubber is integrally formed and vulcanized between outer sleeve-spacer-spacer-mandrel body, so as to be integrally formed as a whole;Rubber fully wraps multiple spacers, and rubber extends to the end face of outer sleeve;The spacer is designed as spherical arc, and the two symmetrical spacers form a spherical gap.;The spacer is equidistantly arranged in unequal height.;The flat surface of spacer and mandrel body is cross arranged at 45 °.

[0007] Further, the gap of the butt joint of every two layers of two hemispherical spacers is cross arranged.;The gap of each layer of spacers is staggered with the direction of flat surface hole of mandrel body.

[0008] Further, the height difference of the spacer is 1-4mm.;The matching gap of adjacent spacers is 1-3mm.

[0009] Further, the spacer is designed as 2-7 layers.

[0010] Further, the rubber wrapping extends 1-2 mm beyond the end face of the sleeve.

[0011] A preparation mold of a damping multilayer rubber bearing, the mold is an integral injection rubber vulcanization forming mold, comprising a monolithic lower mold, a middle mold and a split upper mold; the monolithic lower mold is provided with a first positioning slot and a first positioning pin for assembling the spacer; the middle mold is used for fixing the sleeve and is designed as a ring structure; the split upper mold is evenly divided into four parts and is sequentially arranged and assembled together with the monolithic lower mold.

[0012] Further, each of the split upper molds is provided with a second positioning slot, a second positioning pin and an injection hole for assembling the spacer, and the second positioning slot and the second positioning pin correspond to the first positioning slot and the first positioning pin; the injection hole is designed in one body with the second positioning pin, that is, the injection hole is arranged on the second positioning pin.

[0013] Further, the position of the first positioning slot matches the position of each layer of the spacer, and the first positioning pin is located on the side surface of the first positioning slot.

[0014] Further, the injection hole is a circular hole.

[0015] As a new type of damping product, the rubber bearing can realize large-angle rotation and torsion with reasonable structural design, has the characteristics of metal bearings, and has a certain elasticity, can provide elastic connection for rail vehicles, and solve the metal gap collision noise and dry grinding noise caused by metal bearings. As a non-metal bearing, the damping multilayer rubber bearing will be used more and more in the field of rail transit.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1) The damping multilayer rubber bearing of the utility model can replace metal bearings, not only reduces the cost, but also solves the noise problem caused by long-term use of metal bearings.

[0018] 2) The sleeve, spacer and core shaft body of the damping multilayer rubber bearing are all designed as spherical arcs, which can realize large-angle torsion and deflection performance of metal-like bearings.

[0019] 3) The damping multilayer rubber bearing of the utility model, the spacers are equidistant and have different heights, which realizes large-angle rotation and torsion of metal-like bearings.

[0020] 4) The damping multilayer rubber bearing of the utility model, the spacers and the flat surface of the core shaft body are arranged at 45°, which can realize large bearing capacity.

[0021] 5) The damping multilayer rubber bearing of the utility model, rubber is wrapped to the end face of the sleeve, effectively prevents the adverse effects of the external environment on the metal from rusting.

[0022] 6) The damping multilayer rubber bearing of the utility model, rubber fully wraps the spacer, which can effectively provide the assembly efficiency and service life of the bearing.

[0023] 7) The damping multilayer rubber bearing of the utility model is reasonable in design, compact in structure and convenient to use.

[0024] 8) The utility model also provides a preparation mold of the damping multilayer rubber bearing, namely, an integrated glue injection vulcanization forming mold, which comprises an integrated lower mold, a split upper mold and a middle mold, can realize efficient assembly, and improves the production efficiency and the qualified rate.

[0025] Moreover, the split design of the upper mold and the structures such as the positioning groove and the positioning pin solve the problem of the spacer cooperation and can effectively reduce the deformation caused by the pressure in the spacer assembly process and the forming process.

[0026] The split design of the upper mold effectively solves the problem of the skeleton assembly difficulty, because there are more positions that need to be matched, if the integrated upper mold is used for integral assembly, some interference points cannot be matched in place, and continuous forming will cause the skeleton to be deformed and broken; the split upper mold of the application can be matched by 1 / 4, then 1 / 2, and then 3 / 4, so that the split upper mold can be matched with each other more excellently.

[0027] In addition, the glue injection hole and the positioning pin on the split upper mold are integrally designed, which solves the problems of the spacer deformation and breakage caused by the pressure in the forming process, and makes the internal stress more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a sectional view of the damping multilayer rubber bearing of the utility model;

[0029] Figure 2 It is a left view of the damping multilayer rubber bearing of the utility model;

[0030] Figure 3 It is a schematic view of the integrated lower mold;

[0031] Figure 4 It is a schematic view of the split upper mold;

[0032] Figure 5 It is a three-dimensional schematic view of mold assembly;

[0033] Among them: 1 sleeve, 2-6 spacer, 7 core shaft body, 8 rubber.

[0034] A integrated lower mold, B middle mold, C split upper mold,

[0035] A1 first positioning pin,

[0036] C1 second positioning pin, C2 positioning groove, C3 glue hole. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the technical solutions in the utility model embodiments are clearly and completely described below with reference to the accompanying drawings.

[0038] Embodiment 1:

[0039] Referring to Figure 1 and Figure 2 , the damping multilayer rubber bearing of the embodiment comprises, from outside to inside, an outer sleeve 1, multiple spacers 2-6 and a core shaft body 7, and rubber 8 is vulcanized between the outer sleeve 1-spacer 2-6-core shaft body 7, that is, the rubber 8 is integrally vulcanized and formed on the inner side of the outer sleeve 1, between the spacers 2-6 and the outer side of the core shaft body 7, and more specifically, the rubber 8 is vulcanized between the core shaft body 7 and the spacers, between the spacers and the spacers, and between the spacers and the outer sleeve 1.

[0040] Preferably, the rubber 8 is integrally vulcanized and formed on the inner side of the outer sleeve 1, the inner and outer sides of the spacers 2-6 and the outer side of the core shaft body 7.

[0041] Among them, the spacer 2-6 is provided with 2-7 pieces. Preferably, the spacer 2-6 of the embodiment is provided with 5 pieces.

[0042] Among them, the spacers 2-6 are arranged at equal intervals and have different heights, with a height difference of 1-4 mm; the fitting gap between adjacent spacers 2-6 is 1-3 mm, and the gap is preferably 2 mm.

[0043] The material of the spacer 2-6 in the embodiment is HC240 (high-strength cold-rolled steel plate for automobiles).

[0044] Among them, the spacer 2-6 is provided in a spherical arc shape, which can realize large-angle torsion and deflection of the metal-like bearing.

[0045] The spacer 2-6 is of a split type, and the two symmetrical spacers are combined into a spaced spherical shape (where the spacing refers to the gap at the joint of the two hemispherical spacers), as shown in Figure 2 , the two spacers are symmetrically assembled into a spherical shape, and are installed in a cut-and-wrap manner.

[0046] Among them, the spacers 2-6 are cross-arranged at an angle of 45° with the flat surface of the core shaft body 7 when assembled, which can realize larger load bearing: specifically as Figure 2As shown, the gap positions between each pair of partitions (referring to the gap at the joint of the two hemispherical partitions) are arranged in a cross pattern, and the gap positions of each partition are offset from the direction of the flat hole of the mandrel 7. Since the hole direction is the direction of load force, if the gap of the partition is in this direction, the load-bearing capacity will decrease.

[0047] Among them, rubber 8 fully encloses the multi-layered septa 2-6, and rubber 8 extends to the outer end face.

[0048] Preferably, the rubber 8 extends beyond the end face of the outer jacket 1 by 1-2 mm, which can effectively prevent delamination and corrosion.

[0049] In this embodiment, the outer casing 1 is made of 45 steel, and the mandrel 7 is made of 42CrMo steel.

[0050] Example 2:

[0051] This embodiment provides a mold for preparing the vibration-damping multilayer rubber bearing of Embodiment 1, including an integral lower mold A, a middle mold B, and a split upper mold C.

[0052] Among them, such as Figure 3 As shown, the integral lower mold A is provided with a positioning groove for assembling partitions and a first positioning pin A1. The position of each positioning groove matches the position of each partition. The first positioning pin A1 is located on both sides of the positioning groove and is used to position the gap between the partitions to facilitate the assembly of the partitions. The positioning groove has an arc-shaped groove design.

[0053] like Figure 4 As shown, the split upper mold C is divided into 4 equal parts and arranged in sequence for assembly and adjustment with the above-mentioned integral lower mold A.

[0054] Each split upper mold C is provided with a positioning groove C2 for assembling partitions, a second positioning pin C1 and a glue injection hole C3. The positioning groove C2 and the second positioning pin C1 of the split upper mold C correspond to the positioning groove and the first positioning pin A1 of the above-mentioned integral lower mold A.

[0055] The positioning groove C2 has an arc-shaped groove design, which makes the assembly of the partition smoother, prevents assembly interference, and achieves an aesthetically pleasing appearance;

[0056] The second locating pin C1 is a cuboid structure with a width of 2-3mm;

[0057] The second locating pin C1 and the injection hole C3 are integrated: the injection hole C3 is a circular hole (φ1-3mm). The injection hole C3 is set on the second locating pin C1, and rubber is injected into the mold through the injection hole C3.

[0058] The middle mold is used to fix the outer jacket 1 and is designed as a ring structure.

[0059] Example 3:

[0060] The method for preparing the vibration-damping multilayer rubber bearing of Example 1 using the preparation mold of Example 2 includes the following steps:

[0061] S1: The outer sleeve 1, spacers 2-6, and spindle body 7 of the vibration damping multilayer rubber bearing are sandblasted and cleaned and degreased.

[0062] S2: Apply a two-component rubber vulcanizing adhesive to the inner side of the outer jacket 1, the surface of the multiple spacers 2-6, and the outer surface of the mandrel 7.

[0063] S3: Based on the structure of the vibration-damping multilayer rubber bearing, an integrated injection vulcanization mold (the preparation mold for the vibration-damping multilayer rubber bearing) is designed, and vulcanization is directly injected and formed in one go through the injection press (the structure of this mold has been described in Example 2, and will not be repeated here).

[0064] S4: First, place the mandrel body 7 into the integral lower mold A. Then, place the partition pieces 2-6 one by one into the positioning groove of the integral lower mold A in sequence from the innermost to the outermost side. Place them in pairs as a group, symmetrically on both sides of the first positioning pin A1. Finally, put in the outer sleeve 1.

[0065] S5: After assembly, insert the middle mold B to fix the outer jacket 1, and then press the split upper mold C in sequence. Figure 4 The correct assembly is performed in the order ①②③④.

[0066] S6: Preheat the integrated injection vulcanizing mold and set the vulcanization molding parameters for vulcanization molding. Inject rubber into the mold through the injection hole C3.

[0067] Preferably, the molding temperature is 145℃-155℃, the molding pressure is 12-13MPa, and the molding time is 25-35min.

[0068] S7: After vulcanization molding, open the mold, trim the bearing surface, and the manufacturing is complete.

[0069] The above description is merely a preferred embodiment of the present utility model and does not constitute a limitation on the scope of protection of the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the scope of protection of the claims of the present utility model.

Claims

1. A vibration-damping multilayer rubber bearing, characterized in that, The vibration-damping multilayer rubber bearing includes an outer sleeve, multiple spacers, and a mandrel arranged sequentially from the outside to the inside. The rubber is integrally molded and vulcanized between the outer sleeve, spacers, spacers, and mandrel to form a single unit. The rubber completely encloses multiple spacers and extends to the end face of the outer sleeve. The spacers are spherical arc-shaped, and two symmetrical spacers form a sphere with gaps. The spacers are arranged at equal intervals but with unequal heights. The spacers and the flat surface of the mandrel are arranged at a 45° angle to each other.

2. The vibration-damping multilayer rubber bearing as described in claim 1, characterized in that, The gaps at the joints of the two hemispherical spacers in each pair of layers are arranged in an alternating pattern; the gaps in each layer of spacers are offset from the orientation of the flat facets of the mandrel.

3. A vibration-damping multilayer rubber bearing as described in claim 1 or 2, characterized in that, The height difference of the partition is 1-4mm; the fitting gap between adjacent partitions is 1-3mm.

4. A vibration-damping multilayer rubber bearing as described in claim 1 or 2, characterized in that, The spacers are configured with 2-7 layers.

5. A vibration-damping multilayer rubber bearing as described in claim 1 or 2, characterized in that, The rubber wrapping extends 1-2 mm beyond the end face of the outer casing.

6. A mold for manufacturing a vibration-damping multilayer rubber bearing as described in any one of claims 1-5, characterized in that, The mold is an integrated injection vulcanization molding mold, including an integral lower mold, a middle mold, and a split upper mold; the integral lower mold is provided with a first positioning groove and a first positioning pin for assembling the partition; the middle mold is used to fix the outer jacket and is designed as a ring structure; the split upper mold is divided into 4 equal parts, which are arranged in sequence and assembled together with the integral lower mold.

7. The mold for manufacturing a vibration-damping multilayer rubber bearing as described in claim 6, characterized in that, Each of the aforementioned split upper molds is provided with a second positioning groove, a second positioning pin, and an injection hole for assembling the partition plate. The second positioning groove and the second positioning pin correspond to the first positioning groove and the first positioning pin. The injection hole is integrated with the second positioning pin and is opened on the second positioning pin.

8. The mold for manufacturing a vibration-damping multilayer rubber bearing as described in claim 6 or 7, characterized in that, The position of the first positioning groove matches the position of each layer of partition, and the first positioning pin is located on the side of the first positioning groove.

9. The mold for manufacturing a vibration-damping multilayer rubber bearing as described in claim 7, characterized in that, The injection hole is a circular hole.

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