CN220101870U - Wedge-type front air chamber - Google Patents
Wedge-type front air chamber Download PDFInfo
- Publication number
- CN220101870U CN220101870U CN202320581317.3U CN202320581317U CN220101870U CN 220101870 U CN220101870 U CN 220101870U CN 202320581317 U CN202320581317 U CN 202320581317U CN 220101870 U CN220101870 U CN 220101870U
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- Prior art keywords
- wedge
- press
- riveting part
- rear cover
- cover
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- 239000002131 composite material Substances 0.000 claims abstract description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 13
- 239000010985 leather Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000001746 injection moulding Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 8
- 238000005266 casting Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 238000003754 machining Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001962 electrophoresis Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to the field of truck braking, and provides a wedge-type front air chamber, which comprises: the front cover and the rear cover are connected with the front cover; the front cover and the rear cover form a front air chamber, and a piston assembly is arranged in the front air chamber formed by the rear cover and the front cover; the front cover and the rear cover are manufactured by using a composite material and an injection molding process, so that the overall weight and the production process of the wedge-shaped front air chamber are greatly reduced; meanwhile, the front cover and the rear cover are connected by press riveting, so that clamp connection in the prior art is replaced, the structure is simplified, and the weight of the wedge-type front air chamber is further reduced; the press riveting connection technology is simple, and the assembly efficiency is improved; meanwhile, after the front cover and the rear cover are connected together by adopting the press riveting structure, the requirement can be met by only arranging an opening on the rear cover of the front air chamber, so that the production process of the rear cover is further simplified.
Description
Technical Field
The utility model relates to the field of truck braking, in particular to a wedge-type front air chamber.
Background
Most of the front covers of the existing wedge brake chambers are formed by machining after casting ductile iron, the workload of machining after casting blanks is large, for example, surface treatment is needed after casting blanks, and meanwhile, rust prevention treatment such as electrophoresis is needed, so that the production efficiency is low, and the cost is high; meanwhile, the weight of the spheroidal graphite cast iron is large, and the excessive weight can seriously influence the weight of the air chamber assembly and even the weight of the whole vehicle; meanwhile, the clamp structure is adopted for connection, so that the number of parts is large, and the structure is complex; the excessive parts are completed by a complex process, so that the overall process has high difficulty and low production efficiency;
the existing wedge brake chamber front cover is also formed by mechanical processing after being cast by aluminum alloy, which is 50% lighter than the cast iron front cover, but the whole weight is still larger; the aluminum alloy casting process has high difficulty, and mechanical processing such as cutting, stamping, mechanical processing, welding, surface treatment and the like is still needed after casting, so that the processing amount is still large; meanwhile, the price of the aluminum alloy raw material is very high; and the aluminum alloy front cover still adopts a clamp structure, and the assembly process is complex.
Disclosure of Invention
The utility model provides a wedge-type front air chamber, which is characterized in that a front cover and a rear cover are manufactured by using a composite material and an injection molding process, so that the overall weight and the production process of the wedge-type front air chamber are greatly reduced; meanwhile, the front cover and the rear cover are connected by press riveting, so that clamp connection in the prior art is replaced, the structure is simplified, and the weight of the wedge-type front air chamber is further reduced; the press riveting connection technology is simple, and the assembly efficiency is improved; meanwhile, after the front cover and the rear cover are connected together by adopting the press riveting structure, the requirement can be met by only arranging an opening on the rear cover of the front air chamber, so that the production process of the rear cover is further simplified.
The technical scheme of the utility model is realized as follows:
a wedge-type front plenum comprising: the front cover and the rear cover are connected with the front cover; the front cover and the rear cover form a front air chamber, and a piston assembly is arranged in the front air chamber formed by the rear cover and the front cover; the piston assembly comprises a piston, a piston rod and a push plate, the piston and the push plate are respectively arranged at two ends of the piston rod, a guide cylinder is integrally formed at the top end of the front cover, the piston rod is arranged in the guide cylinder through a guide seat assembly, the piston is positioned in the guide cylinder, and the push plate is positioned in the front air chamber; the bottom end of the guide cylinder extends into the front air chamber, and a first reinforcing rib for supporting the bottom end of the guide cylinder is arranged in the front cover; the outer peripheral side of the top end of the guide cylinder is provided with a second reinforcing rib; the front cover is provided with a drain hole; a third reinforcing rib is arranged on the bottom end face of the rear cover;
the bottom end of the rear cover is provided with an air inlet;
the front cover is connected with the rear cover through a press riveting structure;
the front cover and the rear cover are both made of composite materials;
the composite material is one of nylon, PET or PBT.
Further, the press riveting structure comprises a first press riveting part and a second press riveting part, the first press riveting part is arranged on the front cover, the second press riveting part is arranged on the rear cover, and the first press riveting part and the second press riveting part are mutually press riveting connected.
Further, the press riveting structure further comprises a third press riveting part, a leather cup is sleeved on the inner bottom of the rear cover, the edge of the leather cup seals a connecting gap between the first press riveting part and the second press riveting part, and the edge of the leather cup forms the third press riveting part.
Further, the second riveting part is a groove which is recessed outwards, and the edge of the leather cup and the first riveting part are in pressure-equalizing riveting in the groove.
Further, the first press riveting part is in a wedge shape which is gradually thickened from outside to inside.
Further, the inclination angle of the top edge of the first press riveting part is smaller than that of the bottom edge.
Further, the bottom of the second press riveting part is tilted downwards.
Further, the third press riveting part is in an inverted wedge shape with gradually reduced thickness from outside to inside.
Further, an inverted-wedge-shaped edge of the third press riveting part and the bottom of the second press riveting part which is tilted downwards form an inverted-buckling structure.
Further, a wedge seam is formed after the second press riveting part and the third press riveting part are assembled, and the first press riveting part is wedged in the wedge seam.
The front cover and the rear cover are manufactured by using a composite material and an injection molding process, so that the overall weight and the production process of the wedge-shaped front air chamber are greatly reduced; meanwhile, the front cover and the rear cover are connected by press riveting, so that clamp connection in the prior art is replaced, the structure is simplified, and the weight of the wedge-type front air chamber is further reduced; the press riveting connection technology is simple, and the assembly efficiency is improved; meanwhile, after the front cover and the rear cover are connected together by adopting the press riveting structure, the requirement can be met by only arranging an opening on the rear cover of the front air chamber, so that the production process of the rear cover is further simplified.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a cross-sectional view of the overall structure of a wedge-type front plenum in accordance with an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of the front cover of the wedge-type front plenum shown in FIG. 1;
FIG. 3 is a cross-sectional view of the rear cover of the wedge-type front plenum shown in FIG. 1;
FIG. 4 is a cross-sectional view of the cup of the wedge-type front air chamber of FIG. 1;
reference numerals illustrate: a front cover 1; a guide cylinder 11; a first reinforcing rib 12; second reinforcing ribs 13; a drain hole 14; a rear cover 2; a third reinforcing rib 21; an air inlet 22; a front air chamber 3; a piston assembly 4; a piston 41; a piston rod 42; a push plate 43; a press riveting structure 5; a first press-riveting portion 51; a second press-riveting portion 52; a third press-riveting portion 53; a leather cup 6.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In a specific embodiment of the present utility model, see FIGS. 1-4, a wedge-type front plenum, comprising: a front cover 1 and a rear cover 2, wherein the rear cover 2 is connected with the front cover 2; the front cover 1 and the rear cover 2 are integrally formed by adopting an injection molding process;
the front cover 1 and the rear cover 2 form a front air chamber 3, and a piston assembly 4 is arranged in the front air chamber 3 formed by the rear cover 2 and the front cover 1; the piston assembly 4 comprises a piston 41, a piston rod 42 and a push plate 43, wherein the piston 41 and the push plate 43 are respectively arranged at two ends of the piston rod 42, a guide cylinder 11 is integrally formed at the top end of the front cover 1, the piston rod 42 is arranged in the guide cylinder 11 through a guide seat assembly 44, the piston 43 is positioned in the guide cylinder 11, and the push plate 43 is positioned in the front air chamber 3; the bottom end of the guide cylinder 11 extends into the front air chamber 3, and a first reinforcing rib 12 for supporting the bottom end of the guide cylinder 11 is arranged in the front cover 1; the outer peripheral side of the top end of the guide cylinder 11 is provided with a second reinforcing rib 13; a third reinforcing rib 21 is arranged on the bottom end face of the rear cover 2;
the front cover 1 is provided with a drain hole 14, so that water can be smoothly discharged after the front air chamber 3 is filled with water;
the bottom end of the rear cover 2 is provided with an air inlet 22, and only one air inlet is reserved in the air chamber of the press riveting structure 5;
the front cover 1 is connected with the rear cover 2 through a press riveting structure 5;
the front cover 1 and the rear cover 2 are both made of composite materials;
the composite material is one of nylon, PET or PBT.
In a specific embodiment of the present utility model, as shown in fig. 1 to 4, the press-riveting structure 5 includes a first press-riveting portion 51 and a second press-riveting portion 52, the first press-riveting portion 51 is disposed on the front cover 1, the second press-riveting portion 52 is disposed on the rear cover 2, and the first press-riveting portion 51 and the second press-riveting portion 52 are in press-riveting connection with each other.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the press-riveting structure 5 further includes a third press-riveting portion 53, a cup 6 is sleeved on the inner bottom of the rear cover 2, a connection gap between the first press-riveting portion 51 and the second press-riveting portion 52 is sealed by an edge of the cup 6, and the edge of the cup 6 forms the third press-riveting portion 53.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the second press-riveting portion 52 is an outwardly concave groove, and the edge of the cup 6 and the first press-riveting portion 51 are press-riveted in the groove.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the first clinching portion 51 is tapered and gradually thickened from outside to inside.
In the embodiment of the present utility model, as shown in fig. 1-4, the inclination angle of the top edge of the first press-riveting portion 51 is smaller than that of the bottom edge, so that the first press-riveting portion 51 forms a wedge, and is combined with the third press-riveting portion 53 to be pressed into the groove of the second press-riveting portion 52.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the bottom of the second clinching portion 52 is turned down to provide a clinching space for the third clinching portion 53 on the cup.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the third press-riveting portion 53 is in an inverted wedge shape with gradually decreasing thickness from outside to inside, and the third press-riveting portion 53 can be press-riveted with the first press-riveting portion 51 more firmly under the action of the first press-riveting portion 51.
In the embodiment of the present utility model, as shown in fig. 1 to 4, an inverted wedge-shaped edge of the third press-riveting portion 53 and the bottom of the second press-riveting portion 52 that is tilted downward form an inverted structure, and the first press-riveting portion 51 and the third press-riveting portion 53 are arranged to form an inverted structure, so that detachment between the first press-riveting portion 51 and the second press-riveting portion 52 is effectively prevented, and when the first press-riveting portion 51 and the second press-riveting portion 52 are detached, because the outer end thickness is larger, extrusion is formed between the first press-riveting portion 51 and the second press-riveting portion 52, so that detachment of the first press-riveting portion 51 and the second press-riveting portion 52 is ensured, and stability of the structure is higher.
In the embodiment of the present utility model, as shown in fig. 1 to 4, the second press-riveting portion 52 and the third press-riveting portion 53 form a wedge seam after being assembled, the first press-riveting portion 51 is wedged into the wedge seam, and the first press-riveting portion 51, the second press-riveting portion 52 and the third press-riveting portion 53 interact with each other to ensure the stability of the connection between the front cover 1 and the rear cover 2.
The utility model changes the raw materials of the wedge-type air chamber: the comparison parameters are as follows:
1. taking 45% reinforced nylon 66 as an example, the material performance index is as follows:
tensile strength (MPa): 195, density: 1.53, heat distortion temperature: 220 ℃, characteristics: high rigidity;
2. ductile iron front cover raw material characteristics QT450-10:
tensile strength (MPa) 450, density: 7, characteristics: high strength;
3. aluminum alloy ADC12 raw material properties:
tensile strength (MPa) 230, density: 2.7, the characteristics are: the specific gravity is small;
the composite materials such as nylon are adopted, the strength of the composite materials such as nylon is high, the specific gravity of the composite materials is light, and the weight of the front cover is reduced by 70% compared with that of the nodular cast iron front cover with the same volume and 40% compared with that of aluminum alloy; the mechanical property of the high-strength composite material is equivalent to that of aluminum alloy, the toughness and the shock resistance are better, but the cost is reduced by 30%, and the problems of large weight and high cost are solved;
when the front cover and the rear cover are produced by the composite material, a high-efficiency injection molding production process is adopted, the process is simple and efficient, the production efficiency is high, and the process flow is compared as follows:
1. the utility model comprises the following steps: injection molding of the front cover, simple processing and press riveting of the assembly;
2. ball iron protecgulum structure: casting a front cover, polishing burrs, blasting balls, machining (large and small flanges, inner holes and the like), cleaning, electrophoresis or plastic spraying, assembling and positioning, and installing a clamp;
3. aluminum alloy front cover structure: the method comprises the steps of die casting a front cover, polishing burrs, machining (inner holes of large and small flanges and the like), cleaning, assembling and positioning, and installing a clamp;
meanwhile, a press riveting structure is adopted, so that clamp connection is omitted, the product structure is simplified, the assembly process is improved, the weight and the production cost are greatly reduced, and the production efficiency and the assembly efficiency are effectively improved;
meanwhile, through CAE analysis, the wall thickness of the front cover and the rear cover is reasonably increased, and structures such as reinforcing ribs are added at key positions, so that the strength of the front cover and the rear cover is ensured to meet the use requirement.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A wedge-type front plenum comprising: the front cover and the rear cover are connected with the front cover; the front cover and the rear cover form a front air chamber, and a piston assembly is arranged in the front air chamber formed by the rear cover and the front cover; the piston assembly comprises a piston, a piston rod and a push plate, the piston and the push plate are respectively arranged at two ends of the piston rod, a guide cylinder is integrally formed at the top end of the front cover, the piston rod is arranged in the guide cylinder through a guide seat assembly, the piston is positioned in the guide cylinder, and the push plate is positioned in the front air chamber; the bottom end of the guide cylinder extends into the front air chamber, and a first reinforcing rib for supporting the bottom end of the guide cylinder is arranged in the front cover; the outer peripheral side of the top end of the guide cylinder is provided with a second reinforcing rib; the front cover is provided with a drain hole; a third reinforcing rib is arranged on the bottom end face of the rear cover;
the method is characterized in that: the bottom end of the rear cover is provided with an air inlet;
the front cover is connected with the rear cover through a press riveting structure;
the front cover and the rear cover are both made of composite materials;
the composite material is one of nylon, PET or PBT.
2. A wedge-type front plenum as claimed in claim 1, wherein: the press riveting structure comprises a first press riveting part and a second press riveting part, the first press riveting part is arranged on the front cover, the second press riveting part is arranged on the rear cover, and the first press riveting part and the second press riveting part are mutually press-riveted.
3. A wedge-type front plenum as claimed in claim 2, wherein: the riveting structure further comprises a third riveting part, a leather cup is sleeved on the inner bottom of the rear cover, the edge of the leather cup seals a connecting gap between the first riveting part and the second riveting part, and the edge of the leather cup forms the third riveting part.
4. A wedge-type front plenum as claimed in claim 3, wherein: the second pressure riveting part is an outwards concave groove, and the edge of the leather cup and the first pressure riveting part are pressure-equalized and riveted in the groove.
5. A wedge-type front plenum as claimed in claim 4, wherein: the first press riveting part is wedge-shaped and gradually thickened from outside to inside.
6. A wedge-type front plenum as claimed in claim 5, wherein: the inclination angle of the top edge of the first press riveting part is smaller than that of the bottom edge.
7. A wedge-type front plenum as claimed in claim 5, wherein: the bottom of the second press riveting part is tilted downwards.
8. A wedge-type front plenum as claimed in claim 7, wherein: the third press riveting part is in an inverted wedge shape with gradually reduced thickness from outside to inside.
9. A wedge-type front plenum as claimed in claim 7, wherein: and an inverted-wedge-shaped edge of the third press riveting part and the bottom of the second press riveting part which is tilted downwards form an inverted-buckling structure.
10. A wedge-type front plenum as claimed in claim 7, wherein: and the second press riveting part and the third press riveting part form a wedge joint after being assembled, and the first press riveting part is wedged in the wedge joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320581317.3U CN220101870U (en) | 2023-03-22 | 2023-03-22 | Wedge-type front air chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320581317.3U CN220101870U (en) | 2023-03-22 | 2023-03-22 | Wedge-type front air chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220101870U true CN220101870U (en) | 2023-11-28 |
Family
ID=88845392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320581317.3U Active CN220101870U (en) | 2023-03-22 | 2023-03-22 | Wedge-type front air chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220101870U (en) |
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2023
- 2023-03-22 CN CN202320581317.3U patent/CN220101870U/en active Active
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