Tool for oil duct sand core of new energy reducer shell

Abstract

The utility model discloses a new energy reducer shell oil duct sand core tool which comprises a movable core box, a fixed core box, rack mounting plates, a heating pipe, a sand shooting opening, a positioning pin, a positioning bush, a core ejecting mechanism and an exhaust groove, and the rack mounting plates are located on the two sides of the bottom of the movable core box and the two sides of the bottom of the fixed core box; the core ejecting mechanism is positioned at the bottoms of the movable and fixed core boxes and is positioned in the middle of the rack mounting plate; the positioning pin and the positioning bush are respectively arranged on the movable core box and the fixed core box through interference fit; the heating pipe penetrates through the movable core box body and the fixed core box body; and the exhaust grooves are distributed on the parting surface of the movable core box. According to the utility model, the oil duct sand core of the speed reducer shell is independently designed and formed and then assembled on the main body sand core, so that the structure of the inner cavity sand core of the speed reducer shell is simplified, the core manufacturing process difficulty is reduced, the complex sand core can be produced on a common core shooter in batches, and the produced sand core is complete in structure, high in strength and hardness and clear in oil duct outline; the produced speed reducer shell casting is good in inner cavity quality and free of the defects of succulent parts, sand washing and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to tooling mould technical field especially relates to a new energy speed reducer casing oil channel sand core tooling. BACKGROUND

[0002] Speed reducer is an important component of new energy automobile power assembly, and the input torque of motor is output to half shaft to drive the whole vehicle to run, and the relative action of torque transmission and matching speed is played. The casing of speed reducer plays a supporting and protecting role for transmission shaft, and provides a closed working space for transmission parts, so that they are in good working condition and good lubrication condition is created, so the casing of speed reducer should have high strength and sealing property of casing. Because the inner cavity structure of speed reducer casing is complex and contains multiple oil channels with small diameter, the casting process is poor, and the conventional parting mode cannot meet the sand core parting, at present, similar products mostly adopt lost foam casting process, and casting defects are prone to occur in the inner cavity oil channel and narrow part of speed reducer casing, the waste rate is high, and the production cost is high.

[0003] In view of the above problems, the tooling for the sand core of the oil channel of the casing of the new energy speed reducer is provided in the application. CONTENT OF THE UTILITY MODEL

[0004] (I) purpose of the utility model

[0005] In order to solve the problems existing in the casing of speed reducer in the background art, the utility model provides a tooling for the sand core of the oil channel of the casing of the new energy speed reducer, the sand core of the inner cavity of the casing of the speed reducer is optimized and designed, the sand core of the oil channel part is separately formed, and then assembled on the sand core body, so that the strength of the narrow part of the sand core is greatly improved, the quality of the sand core is improved, the inner cavity structure of the casing of the speed reducer is guaranteed, the oil channel contour is clear, there is no sand washing, and casting defects such as thick meat are avoided, the requirements of customers are met, and the production cost is saved.

[0006] (II) technical scheme

[0007] In order to realize the purpose of the utility model, the following technical scheme is adopted: a tooling for the sand core of the oil channel of the casing of the new energy speed reducer, including movable core box, fixed core box, rack mounting plate, heating pipe, sand shooting port, positioning pin, positioning bushing, core lifting mechanism and exhaust groove. The rack mounting plate is located at the bottom of the movable core box and the fixed core box, and is installed on the core shooting machine workbench during work; the core lifting mechanism is located at the bottom of the movable core box and the fixed core box and is between the rack mounting plate; the positioning pin and the positioning bushing are respectively installed on the movable core box and the fixed core box through interference fit; the heating pipe penetrates through the movable core box and the fixed core box, and heats the core box during work; the exhaust groove is distributed on the parting surface of the movable core box, and the air pressure and excess gas in the core box are discharged during the core making process.

[0008] Preferably, the movable core box and the fixed core box are designed with 8 reducer housing oil channel sand core cavities and other reducer housing sand core cavities, each of which is provided with a separate sand shooting port, and 8 oil channel sand cores and a plurality of other reducer housing sand cores can be produced in one core production process.

[0009] Preferably, the movable core box and the fixed core box are accurately clamped together under the cooperation of the positioning pin and the positioning bushing, and the core shooter shoots the coated sand into the core box cavity through the sand shooting port.

[0010] Preferably, the heating pipe continuously heats the movable core box and the fixed core box during the working process of the core box, so as to control the temperature of the core box within a certain range, thereby facilitating the heat curing of the coated sand core.

[0011] Preferably, the core ejection mechanism is composed of a core ejection plate, a core ejection rod, a return rod, a core ejection plate connecting bolt and an internal hexagonal screw, and the sand core is ejected during the opening of the movable core box and the fixed core box, and is automatically reset during the clamping process.

[0012] Preferably, the reducer housing oil channel sand core is designed with positioning bosses on both sides, and the main body sand core in the inner cavity of the reducer housing is designed with positioning grooves, so that the formed oil channel sand core and the main body sand core in the inner cavity of the reducer housing are assembled together through the concave-convex cooperation, and then the sand core special repair agent is applied at the assembly position.

[0013] The above technical scheme of the utility model has the following beneficial technical effects: the reducer housing oil channel sand core is separately designed and formed, and then assembled on the main body sand core, which simplifies the structure of the sand core in the inner cavity of the reducer housing, reduces the difficulty of core production process, enables the batch production of such complex sand core on an ordinary core shooter, and realizes the production of sand cores with complete structure, high strength and hardness, clear oil channel contour and good quality of the inner cavity of the reducer housing without defects such as thick flesh and sand washing; in addition, the eight oil channel sand cores are small in size and designed on one core box together with other sand cores, which reduces the number of core box tooling investment, reduces the product development cost, and improves the core box utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model provides a kind of new energy reducer housing oil channel sand core tooling schematic Figure 1 .

[0015] Figure 2 The utility model provides a kind of new energy reducer housing oil channel sand core tooling schematic Figure 2 .

[0016] Figure 3 The utility model provides a kind of new energy reducer housing oil channel sand core tooling reducer housing inner cavity main body sand core schematic diagram.

[0017] Mark No. : 1, movable core box; 2, sand shooting port; 3, top core plate a; 4, top core plate b; 5, inner hexagonal bolt; 6, top core rod; 7, limiting bolt; 8, return rod; 9, rack mounting plate; 10, positioning pin; 11, positioning bushing; 12, fixed core box; 13, heating pipe; 14, exhaust groove; 15, oil channel sand core mold cavity; 16, sand shooting port; 17, oil channel sand core; 18, reducer housing inner cavity main body sand core. DETAILED DESCRIPTION

[0018] To make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0019] As shown in the accompanying Figures 1-3 The utility model discloses a new energy reducer housing oil channel sand core frock, including movable core box 1, fixed core box 12, rack mounting plate 9, heating pipe 13, sand shooting port 16, positioning pin 10, positioning bushing 11, top core mechanism and exhaust groove 14. Rack mounting plate 9 is located at the bottom of movable core box and fixed core box (1, 12) both sides, installs on the core shooting machine workbench when working;Top core mechanism is located at the bottom of movable core box and fixed core box (1, 12) and is between rack mounting plate 9 simultaneously;Positioning pin 10 and positioning bushing 11 are installed on movable core box 1 and fixed core box 12 respectively through interference fit;Heating pipe 13 penetrates movable core box and fixed core box (1, 12) body, heats the core box when working;Exhaust groove 14 is distributed on the parting surface of movable core box 1, and the air pressure and excess gas in the core box are discharged during core making.

[0020] In the example, eight reducer housing oil channel sand core mold cavities 15 and other reducer housing sand core mold cavities are designed on the movable core box and the fixed core box (1, 12), and each reducer housing sand core mold cavity 15 is provided with a separate sand shooting port 16. In a core making process, eight oil channel sand cores 17 and a plurality of other reducer housing sand cores can be produced.

[0021] In the example, the movable core box 1 and the fixed core box 12 are accurately clamped under the cooperation of the positioning pin 10 and the positioning bushing 11, and the core shooting machine shoots the coated sand into the core mold cavity through the sand shooting port 16.

[0022] In the example, the heating pipe 13 continuously heats the movable core box and the fixed core box (1, 12) during the operation of the core box, so as to control the temperature of the core box within a certain range and facilitate the solidification of the coated sand core under heat.

[0023] In the example, the top core mechanism is composed of top core plate a 3, top core plate b 4, top core rod 6, return rod 8, and top core plate connecting bolt 7. During the mold opening process of the movable core box and the fixed core box (1, 12), the core shooter cylinder pushes the top core plate (a3, b4) to move towards the core box parting surface, further driving the top core rod 6 and the return rod 8 to move to eject the sand core; during the mold closing process, the top core plate (a3, b4) and the top core rod 6 return to the initial position with the return rod 8; the movable core box 1 and the fixed core box 12 have the same structure of the top core mechanism.

[0024] In the example, positioning bosses are designed on both sides of the oil channel sand core 17 of the reducer housing, positioning grooves are designed on the main body sand core 18 in the inner cavity of the reducer housing, the gap is designed to be 0.5mm, the formed oil channel sand core and the main body sand core in the inner cavity of the reducer housing are assembled together through the gap, and then the special repairing agent for sand cores is applied at the assembly position.

[0025] It should be understood that the above specific embodiments of the utility model are only used for illustrative or explanatory purposes of the principles of the utility model, and do not constitute a limitation on the utility model. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the utility model should be included in the protection scope of the utility model. In addition, the appended claims of the utility model are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A tooling for sand cores in the oil channel of a new energy reducer housing, comprising a moving core box, a fixed core box, a frame mounting plate, a heating pipe, a sand shooting port, a positioning pin, a positioning bushing, a core ejection mechanism, and an exhaust groove, characterized in that: The frame mounting plates are located on both sides of the bottom of the dynamic and fixed core boxes and are installed on the core shooting machine workbench during operation; the core ejecting mechanism is located at the bottom of the dynamic and fixed core boxes and is located in the middle of the frame mounting plates; the locating pins and locating bushings are respectively installed on the dynamic core box and the fixed core box through interference fit; the heating tube runs through the dynamic and fixed core box bodies to heat the core box during operation; the exhaust grooves are distributed on the parting surface of the dynamic core box to discharge the air pressure and excess gas in the core box during the core making process.

2. The tooling for the oil channel sand core of the new energy reducer housing according to claim 1 is characterized in that: There are 8 reducer housing oil channel sand core mold cavities and other reducer housing sand core mold cavities designed on the dynamic and fixed core boxes. Each reducer housing sand core mold cavity is equipped with a separate sand shooting port. 8 oil channel sand cores and several other reducer housing sand cores can be produced in one core making process.

3. The tooling for sand core of oil channel of new energy reducer housing according to claim 1 is characterized in that: The moving core box and the fixed core box are accurately molded with the cooperation of the positioning pins and positioning bushings, and the core shooting machine shoots the coated sand into the core box cavity through the sand shooting port.

4. The tooling for sand core of oil channel of new energy reducer housing according to claim 1 is characterized in that: The heating tube continuously heats the moving and fixed core boxes during the operation of the core box to ensure that the temperature of the core box is controlled within a certain range, so that the coated sand core can be heated and solidified.

5. The tooling for sand core of oil channel of new energy reducer housing according to claim 1 is characterized in that: The core ejecting mechanism consists of a core ejecting plate, a core ejecting rod, a return rod, a core ejecting plate connecting bolt and a hexagon socket screw. It ejects the sand core during the mold opening process of the dynamic and fixed core boxes and automatically resets it through the return rod during the mold closing process.

6. The tooling for sand core of oil channel of new energy reducer housing according to claim 1 is characterized in that: Positioning bosses are designed on both sides of the reducer housing oil channel sand core, and positioning grooves are designed on the main sand core of the reducer housing inner cavity. The formed oil channel sand core and the main sand core of the reducer housing inner cavity are assembled together through concave-convex fit, and then a special sand core repair agent is applied at the assembly point.

Images