Oil duct sand core assembly of hydraulic pump cover of engineering vehicle

Abstract

The oil duct sand core assembly of the engineering automobile hydraulic pump cover comprises a core head I, a water inlet core I and a water inlet core II are fixedly installed on the side wall of the core head I, a lower flow distribution groove core II is fixedly connected to the side wall of the water inlet core I, and a lower flow distribution groove core I is fixedly connected to the side wall of the water inlet core II. The end of the lower flow distribution groove core I is fixedly connected with a regulating valve hole core II, one side of the end of the lower flow distribution groove core II is fixedly connected with a regulating valve hole core I, one side of the end of the regulating valve hole core I is fixedly connected with a core head I, the end of the regulating valve hole core II is fixedly connected with a core head II, and a core head base IV is fixedly connected between the core head I and the core head II. And one side of the end of each of the regulating valve hole core I and the regulating valve hole core II is fixedly connected with a positioning clamping table. The sand core has the advantages of being reasonable in structural design, novel in conception, easy to machine and manufacture, convenient to pour, safe and reliable in pouring and capable of solving the problems that the sand core is prone to breakage and dislocation in the pouring process.

Description

Technical Field

[0001] The utility model relates to the technical field of casting production of hydraulic pump covers for engineering vehicles, and particularly relates to an oil passage core assembly for a hydraulic pump cover of an engineering vehicle. Background Technique

[0002] The hydraulic pump cover is an important part of the hydraulic pump and plays a key role in the pump. The pump cover is installed on the pump body and has the functions of protecting the pump body, sealing, and improving work efficiency. The pump cover is usually designed with structures such as inlet and outlet liquid flow channels and appropriate adjustment holes, which have the functions of distributing oil volume and adjusting flow rate. There are complex oil channels, oil distribution grooves, and adjustment holes and other structural cavities inside the pump cover. Therefore, the casting of the pump cover is difficult, especially the production of the oil passage core is a problem that must be overcome in the casting of the pump cover.

[0003] The hot box process of coated sand refers to a sand mold manufacturing process in which the finished coated sand (formed by the coating process of thermoplastic resin, hexamine, additives, etc.) is filled into a metal mold with a certain temperature, and the coated sand hardens after being heated to form a shell core / shell mold; the coated sand shell core process has the advantages of high dimensional accuracy, good surface quality, easy storage, good collapsibility, etc., and is usually used for the manufacture of the inner cores of relatively high-precision batch-type small castings.

[0004] For the existing sand cores of hydraulic pump covers, problems such as easy fracture and dislocation of the sand cores are likely to occur during the pouring process. In view of the above technical problems, an oil passage core assembly for a hydraulic pump cover of an engineering vehicle is designed specifically. Content of the Utility Model

[0005] The purpose of the utility model is to provide an oil passage core assembly for a hydraulic pump cover of an engineering vehicle with reasonable structural design, novel concept, easy processing and production, convenient pouring, and safe and reliable pouring, which can solve the problems of easy fracture and dislocation of the sand core during the pouring process.

[0006] An oil passage core assembly for a hydraulic pump cover of an engineering vehicle of the utility model includes core head Ⅰ. Water inlet core Ⅰ and water inlet core Ⅱ are respectively and fixedly installed on the side wall of core head Ⅰ. The side wall of water inlet core Ⅰ is fixedly connected with lower oil distribution groove core Ⅱ, and the side wall of water inlet core Ⅱ is fixedly connected with lower oil distribution groove core Ⅰ. The end of lower oil distribution groove core Ⅰ is fixedly connected with regulating valve hole core Ⅱ, and one side of the end of lower oil distribution groove core Ⅱ is fixedly connected with regulating valve hole core Ⅰ. One side of the end of regulating valve hole core Ⅰ is fixedly connected with core head Ⅰ, and the end of regulating valve hole core Ⅱ is fixedly connected with core head Ⅱ. Core head seat Ⅳ is fixedly connected between core head Ⅰ and core head Ⅱ. Positioning clamping platforms are fixedly connected to one side of the ends of regulating valve hole core Ⅰ and regulating valve hole core Ⅱ.

[0007] The inner cavity structures among the provided water inlet core Ⅰ, water inlet core Ⅱ, lower flow distribution groove core Ⅰ, lower flow distribution groove core Ⅱ, regulating valve hole core Ⅰ, and regulating valve hole core Ⅱ are connected together through core head Ⅰ and core head Ⅱ. Core head Ⅰ and core head Ⅱ connect regulating valve hole core Ⅰ and regulating valve hole core Ⅱ. The core head is designed as a U-shaped structure, which is convenient for placing the whole structure at the bottom layer, having a stable supporting effect, good positioning effect, being convenient for casting, and not prone to dislocation problems.

[0008] The number of the described positioning clamping platforms is two. One of the positioning clamping platforms is fixedly connected with core head Ⅲ on its surface. One side side wall of core head Ⅲ is fixedly connected with regulating hole core, and one side side wall of the regulating hole core is fixedly connected with upper flow distribution groove core Ⅰ.

[0009] Due to the fact that the sand core has a certain strength and the core will be placed downward, the inner cavity between the regulating hole core and upper flow distribution groove core Ⅰ and the movable block structure taken out at the position of the regulating hole core are connected into a whole. Core head Ⅲ is designed at the lower side of the water outlet, and its function is to ensure that the regulating hole core does not shift and ensure the position accuracy of the regulating hole of the casting.

[0010] It further includes a water outlet core. One side side wall of the water outlet core is fixedly connected with core head Ⅳ, and the other side side wall of the water outlet core is fixedly connected with upper flow distribution groove core Ⅱ.

[0011] Due to the fact that the sand core has a certain strength and the core will be placed downward, the inner cavity structure between the water outlet core and upper flow distribution groove core Ⅱ is connected into a whole. Core head Ⅳ is designed at the lower side of the water outlet, and its function is to ensure that the water outlet core does not shift and ensure the position accuracy of the water outlet hole of the casting.

[0012] Core head seats Ⅰ, Ⅱ, Ⅲ, and Ⅳ are arranged at the bottoms of the described core head Ⅰ, core head Ⅱ, core head Ⅲ, and core head Ⅳ. Core head seat Ⅰ and core head seat Ⅲ form the first core head structure; core head seat Ⅱ and core head seat Ⅳ form the second core head structure; a shaft head hole core is arranged on the surface of the second core head structure.

[0013] Core head seat Ⅱ and core head seat Ⅳ arranged on the second core head structure can provide corresponding support for core head Ⅲ and core head Ⅳ, with good support effect; core head seat Ⅰ and core head seat Ⅲ arranged on the first core head structure can provide corresponding support for core head Ⅰ and core head Ⅱ, with good support effect; the shaft head hole core and the sand mold shell are designed as a whole, so that the shaft head hole does not shift during the casting process, ensuring the position accuracy of the shaft head hole of the casting.

[0014] Advantages of the utility model:

[0015] 1) The inner cavity structures between the set water inlet cores I and II, lower distribution groove cores I and II, regulating valve hole cores I and II are connected together through core heads I and II. Core heads I and II connect regulating valve hole cores I and II. The core heads are designed in a U-shaped structure, which is convenient for placing the whole structure at the bottom layer, providing a stable supporting effect, good positioning effect, convenient for casting, and not prone to dislocation problems.

[0016] 2) Since the sand core has a certain strength and the core will be placed downward, the inner cavity between the regulating hole core and the upper distribution groove core I and the loose piece structure taken out at the position of the regulating hole core are connected into a whole. Core head III 17 is designed at the lower side of the water outlet, and its function is to position the sand cores of the regulating hole and the upper distribution groove I to ensure the position dimension accuracy of the regulating hole and the upper distribution groove I of the casting.

[0017] 3) Since the sand core has a certain strength and the core will be placed downward, the inner cavity structure between the water outlet core and the upper distribution groove core II is connected into a whole. Core head IV is designed at the lower side of the water outlet, and its function is to position the sand cores of the water outlet and the upper distribution groove II to ensure the position dimension accuracy of the regulating hole and the upper distribution groove II of the casting.

[0018] 4) Core head seats II and IV provided on the second core head structure can provide corresponding supports for core head III and core head IV, with good supporting effects; core head seats I and III provided on the first core head structure can provide corresponding supports for core head I and core head II, with good supporting effects; their function is to position the shaft head sand core to ensure the position dimension accuracy of the shaft head of the casting.

[0019] 5) The device has a reasonable structural design, novel concept, easy to process and manufacture, convenient for casting, and safe and reliable for casting. It can solve the problems that the sand core is prone to breakage and dislocation during the casting process. The device has been put into use at present, with good use effects, good quality of castings, long service life, and is worthy of wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a structural schematic diagram of the present utility model;

[0021] Figure 2 is a structural schematic diagram of the first group of sand cores of the present utility model;

[0022] Figure 3 is a structural schematic diagram of the second group of sand cores of the present utility model;

[0023] Figure 4 is a structural schematic diagram of the third group of sand cores of the present utility model;

[0024] Figure 5 is a structural schematic diagram of the first core head structure of the present utility model;

[0025] Figure 6 It is a schematic structural diagram of the second core head structure in the present utility model;

[0026] Figure 7 It is a schematic structural diagram of a casting poured by using the present utility model.

[0027] In the figure: water inlet core I 1, water inlet core II 2, water outlet core 3, regulating valve hole core I 4, regulating valve hole core II 5, regulating hole core 6, upper flow distribution groove core I 7, upper flow distribution groove core II 8, lower flow distribution groove core I 9, lower flow distribution groove core II 10, shaft head hole core 11, pouring cup 12, riser 13, ingate 14, core head I 15, core head II 16, core head III 17, core head IV 18, core head seat I 19, core head seat II 20, core head seat III 21, core head seat IV 22, positioning clamping platform 23, first core head structure 24, second core head structure 25. Specific embodiments

[0028] The following will further illustrate the present utility model in conjunction with the attached Figure 1-6 diagrams.

[0029] The present utility model includes water inlet core I 1, water inlet core II 2, water outlet core 3, regulating valve hole core I 4, regulating valve hole core II 5, regulating hole core 6, upper flow distribution groove core I 7, upper flow distribution groove core II 8, lower flow distribution groove core I 9, lower flow distribution groove core II 10, shaft head hole core 11, pouring cup 12, riser 13, ingate 14, core head I 15, core head II 16, core head III 17, core head IV 18, core head seat I 19, core head seat II 20, core head seat III 21, core head seat IV 22, positioning clamping platform 23, first core head structure 24, second core head structure 25. The specific structure includes core head I 15. The side walls of core head I 15 are respectively fixedly installed with water inlet core I 1 and water inlet core II 2. The side wall of water inlet core I 1 is fixedly connected with lower flow distribution groove core II 10. The side wall of water inlet core II 2 is fixedly connected with lower flow distribution groove core I 9. The end of lower flow distribution groove core I 9 is fixedly connected with regulating valve hole core II 5. One side of the end of lower flow distribution groove core II 10 is fixedly connected with regulating valve hole core I 4. One side of the end of regulating valve hole core I 4 is fixedly connected with core head I 15. The end of regulating valve hole core II 5 is fixedly connected with core head II 16. A core head seat IV 22 is fixedly connected between core head I 15 and core head II 16. One side of the ends of regulating valve hole core I 4 and regulating valve hole core II 5 is fixedly connected with positioning clamping platform 23.

[0030] The number of the positioning clamping platforms 23 is two. One of the positioning clamping platforms 23 has a core head III 17 fixedly connected to its surface. One side wall of core head III 17 is fixedly connected with regulating hole core 6. The side wall of regulating hole core 6 is fixedly connected with upper flow distribution groove core I 7.

[0031] It further includes a water outlet core 3. One side wall of the water outlet core 3 is fixedly connected with a core head Ⅳ18, and the other side wall of the water outlet core 3 is fixedly connected with an upper flow distribution groove core Ⅱ8.

[0032] At the bottoms of the core head Ⅰ15, core head Ⅱ16, core head Ⅲ17 and core head Ⅳ18, there are a core head seat Ⅰ19, a core head seat Ⅱ20, a core head seat Ⅲ21 and a core head seat Ⅳ22. The core head seat Ⅰ19 and the core head seat Ⅲ21 form a first core head structure 24; the core head seat Ⅱ20 and the core head seat Ⅳ22 form a second core head structure 25; on the surface of the second core head structure 25, there is a shaft head hole core 11.

[0033] The inner cavity structures between the water inlet core Ⅰ1 and the water inlet core Ⅱ2, the lower flow distribution groove core Ⅰ9 and the lower flow distribution groove core Ⅱ10, the regulating valve hole core Ⅰ4 and the regulating valve hole core Ⅱ5 are connected together through the core head Ⅰ15 and the core head Ⅱ16. The size of the core head Ⅰ15 is 108mm * 23mm * 15mm, the core head clearance is designed to be 0.5mm, and the draft angles on three sides are all 3°; the core head Ⅰ15 and the core head Ⅱ16 connect the regulating valve hole core Ⅰ4 and the regulating valve hole core Ⅱ5. The core head Ⅱ16 is designed as a U-shaped structure with a size of 190mm * 31mm * 15mm, the clearance of the core head Ⅱ16 is designed to be 0.5mm, and the draft angles on three sides are all 3°. When the whole structure is placed at the bottom layer, it has a stable supporting effect, good positioning effect, is convenient for pouring, and is not prone to dislocation problems.

[0034] The inner cavity between the regulating hole core 6 and the upper flow distribution groove core Ⅰ7 and the movable block structure where the regulating hole core 6 is located are connected as a whole. A core head Ⅲ17 is designed under the water outlet. The size of the core head Ⅲ17 is 22mm * 18mm * 11mm, the clearance of the core head Ⅲ17 is designed to be 0.5mm, and the draft angles are all 3°.

[0035] One side wall of the water outlet core 3 is fixedly connected with a core head Ⅳ18, and the other side wall of the water outlet core 3 is fixedly connected with an upper flow distribution groove core Ⅱ8. The set core head Ⅳ18 has a size of 41mm * 28mm * 18mm, the clearance of the core head Ⅳ18 is designed to be 0.5mm, and the draft angles are all 3°.

[0036] The core head seat Ⅱ20 and the core head seat Ⅳ22 provided on the second core head structure 25 can provide corresponding support for the core head Ⅲ17 and the core head Ⅳ18, and the support effect is good; the core head seat Ⅰ19 and the core head seat Ⅲ21 provided on the first core head structure 24 can provide corresponding support for the core head Ⅰ15 and the core head Ⅱ16. A fireproof mother - son buckle structure is designed around the first core head structure 24 and the second core head structure 25, with a buckle depth of 5mm and a clearance of 0.5mm.

[0037] Usage method: 1) Complete the 3D digital model of the pump cover according to the manufacturing drawing; 2) Select the casting method of one type with two pieces according to the structural characteristics of the pump cover, determine the casting position, and complete the design of the gating system and riser 13 according to the relevant principles of casting process design; 3) Complete the design of the first core head structure 24 and the second core head structure 25, determine the parting method and the design of the amount of sand eaten, and the amount of sand eaten is 10 mm; 4) Complete the core splitting design of the inner core according to the core strength and the lower placement principle, the clearance design of core head I 15, core head II 16, core head III 17 and core head IV 18, and the size design of core head I 15, core head II 16, core head III 17 and core head IV 18; 5) Refine the core seat II 20 and core seat IV 22 provided on the second core head structure 25, the core seat I 19 and core seat III 21 provided on the first core head structure 24, and the design of the relevant positioning structure: 6) Place the cores into the second core head structure 25 in the order of the third group of core structures, the second group of core structures and the first group of core structures, and cover the first core head structure 24; 7) Fix the core sand mold by clamping and complete the mold closing and casting.

Claims

1. An oil passage core assembly for an engineering vehicle hydraulic pump cover, characterized in that: It includes a core head Ⅰ (15). On the side walls of the core head Ⅰ (15), a water inlet core Ⅰ (1) and a water inlet core Ⅱ (2) are fixedly installed respectively. On the side wall of the water inlet core Ⅰ (1), a lower flow distribution groove core Ⅱ (10) is fixedly connected. On the side wall of the water inlet core Ⅱ (2), a lower flow distribution groove core Ⅰ (9) is fixedly connected. At the end of the lower flow distribution groove core Ⅰ (9), a regulating valve hole core Ⅱ (5) is fixedly connected. On one side of the end of the lower flow distribution groove core Ⅱ (10), a regulating valve hole core Ⅰ (4) is fixedly connected. On one side of the end of the regulating valve hole core Ⅰ (4), the core head Ⅰ (15) is fixedly connected. At the end of the regulating valve hole core Ⅱ (5), a core head Ⅱ (16) is fixedly connected. Between the core head Ⅰ (15) and the core head Ⅱ (16), a core head seat Ⅳ (22) is fixedly connected. On one side of the ends of the regulating valve hole core Ⅰ (4) and the regulating valve hole core Ⅱ (5), a positioning clamping platform (23) is fixedly connected.

2. The oil passage core assembly of a hydraulic pump cover for an engineering vehicle as described in claim 1, characterized in that: The number of the positioning clamping platforms (23) is two. On the surface of one of the positioning clamping platforms (23), a core head Ⅲ (17) is fixedly connected. On one side wall of the core head Ⅲ (17), a regulating hole core (6) is fixedly connected. On the side wall of the regulating hole core (6), an upper flow distribution groove core Ⅰ (7) is fixedly connected.

3. The oil passage core assembly of an engineering vehicle hydraulic pump cover according to claim 2, characterized in that: It further includes a water outlet core (3). On one side wall of the water outlet core (3), a core head Ⅳ (18) is fixedly connected. On the other side wall of the water outlet core (3), an upper flow distribution groove core Ⅱ (8) is fixedly connected.

4. The oil passage core assembly of an engineering vehicle hydraulic pump cover according to claim 3, characterized in that: At the bottoms of the core head Ⅰ (15), the core head Ⅱ (16), the core head Ⅲ (17) and the core head Ⅳ (18), there are a core head seat Ⅰ (19), a core head seat Ⅱ (20), a core head seat Ⅲ (21) and a core head seat Ⅳ (22). The core head seat Ⅰ (19) and the core head seat Ⅲ (21) form a first core head structure (24); the core head seat Ⅱ (20) and the core head seat Ⅳ (22) form a second core head structure (25); on the surface of the second core head structure (25), a shaft head hole core (11) is provided.

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