Motor housing casting tooling

Abstract

The utility model belongs to foundry technology field relates to a motor casing foundry frock, including frock base and motor casing lost foam, is installed in frock base with support mechanism, and motor casing lost foam is located at the top of support mechanism, and the support rod is installed in frock base, and the upper end of support rod is rotatably connected with positioning mechanism. The utility model discloses a support mechanism and positioning mechanism are set up on its frock base, make it support and position to motor casing lost foam, avoid its displacement when sand box vibration, guarantee the support effect to motor casing lost foam, to prevent motor casing lost foam from appearing deformation even damage in the process such as fireproof coating brushing, drying, handling and modeling, reduce the possibility of deformation and breakage, and then improve the pouring quality of motor casing, when pouring, the high temperature metal liquid can make the wood strip burn and gasify rapidly, and disappear together with the motor casing lost foam, which facilitates the separation of the device and the completed motor casing.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology and relates to a casting tooling for motor housing. Background Technology

[0002] At present, motor housings are usually cast using lost foam casting. The lost foam of motor housings is usually a white mold made of materials such as polystyrene, which has relatively low strength. It is easy to deform or even be damaged during the processes of brushing refractory coating, drying, handling and molding.

[0003] The existing Chinese utility model patent with announcement number CN206305383U describes a lost foam positioning fixture that includes a limiting ring and a positioning component. The positioning component is a triangular frame, and the limiting ring is circular. The limiting ring is provided with a fixing part for fixing the lost foam port into a circle.

[0004] The existing technology has the following technical defects:

[0005] Because the lost foam needs to be placed in a sand box, and the sand box needs to be vibrated when filling with molding sand, the tooling proposed in the above technical solution only uses three triangular splicing strips to fix the lost foam, which is not stable and is prone to displacement or falling off when the sand box vibrates. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a casting fixture for motor housing.

[0007] The motor housing casting fixture of this utility model includes a fixture base and a lost foam casting mold for the motor housing. A support mechanism is installed on the fixture base, and the lost foam casting mold for the motor housing is located above the support mechanism. A support rod is installed in the fixture base, and a positioning mechanism is rotatably connected to the upper end of the support rod. The positioning mechanism includes a threaded cylinder, a convex ring, a placement groove, and a supporting wooden strip. The threaded cylinder is rotatably connected to the support rod, and a convex ring is connected to the outer side of the threaded cylinder. A placement groove is opened on the convex ring, and one end of the supporting wooden strip is inserted into the placement groove. The other end of the supporting wooden strip is attached to the inner wall of the opening above the lost foam casting mold for the motor housing. The lost foam casting mold for the motor housing is supported on the support blocks in the support mechanism and is not directly attached to the upper wall of the fixture base, thereby preventing the lost foam casting mold for the motor housing from disappearing during casting. Afterwards, the motor housing adheres to the tooling base, affecting subsequent demolding. The positioning mechanism is installed on the threaded rod through the cooperation between the threaded cylinder and the threaded rod, allowing the position of the positioning mechanism to be adjusted. This makes the device suitable for lost molds of motor housings of different heights, improving its applicability. At the same time, the length of the supporting wooden strip can also be made according to the diameter of the opening above the lost mold of the motor housing. The length of the supporting wooden strip is equal to the distance between the end of the placement groove near the threaded cylinder and the inner wall of the opening of the lost mold of the motor housing. The outer side of the supporting wooden strip is consistent with the supporting wooden block and is coated with adhesive, which can be adhered to the lost mold of the motor housing, improving the stability of the connection with the lost mold of the motor housing and avoiding displacement, which would affect the support of the lost mold of the motor housing.

[0008] The outer wall of the threaded cylinder is provided with a threaded hole, and a bolt is connected in the threaded hole. The bolt abuts against the side wall of the support rod. When filling the molding sand, the sand box needs to be vibrated to make the molding sand filling more complete. In order to prevent the threaded cylinder from rotating when the sand box is vibrated, the position of the threaded cylinder can be further fixed by setting the threaded hole and the bolt to prevent the threaded cylinder from rotating.

[0009] The support rod is provided with a crossbar, a threaded rod and positioning holes. The crossbar is installed on the inner wall of the tooling base. A threaded rod is installed at the center of the upper wall of the crossbar. The threaded cylinder is rotatably connected to the threaded rod. Positioning holes are opened on the side wall of the threaded rod. Bolts can be inserted into the positioning holes. Multiple positioning holes are opened on the side wall of the threaded rod. When the bolt is inserted into the appropriate positioning hole, the position of the threaded cylinder can be fixed.

[0010] The support mechanism includes a socket and a support block. The upper wall of the tooling base has a socket, and the support block is inserted into the socket. The outer side of the support block is coated with adhesive, and the support block can be attached to the lower wall of the lost foam of the motor housing.

[0011] A locking nut is rotatably connected to the end of the threaded rod. A support rod is provided on the locking nut, and a lifting ring is installed on the support rod. The locking nut can fix the position of the threaded cylinder again. At the same time, the support rod and lifting ring above the locking nut can facilitate the removal and transfer of this device.

[0012] The bottom of the tooling base is equipped with a positioning pin. The positioning pin and the hole in the inner wall of the external sand box can be matched to ensure that the device will not be displaced after being placed in the sand box.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features a support and positioning mechanism on its tooling base to support and position the lost mold of the motor housing. The top wooden strip is placed in a placement groove, which positions it and prevents displacement during sand box vibration, ensuring effective support for the lost mold. This prevents deformation or damage during refractory coating application, drying, handling, and molding, reducing the likelihood of deformation and breakage, and thus improving the casting quality of the motor housing. Both the top wooden strip and the supporting wooden block are made of flammable materials. During casting, the high-temperature molten metal causes the wooden strip to burn and vaporize rapidly, disappearing along with the lost mold, facilitating separation of the device from the finished motor housing. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the positioning mechanism structure in one embodiment of the present invention.

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the positioning mechanism in one embodiment of the present invention.

[0018] In the diagram: 1. Tooling base; 2. Lost foam casting of motor housing; 3. Positioning pin; 4. Insertion hole; 5. Supporting wooden block; 6. Support rod; 7. Crossbar; 8. Threaded rod; 9. Positioning hole; 10. Lifting ring; 11. Threaded cylinder; 12. Raised ring; 13. Placement groove; 14. Top holding wooden strip; 15. Threaded hole; 16. Bolt; 17. Locking nut; 18. Support rod. Detailed Implementation

[0019] Example 1

[0020] like Figures 1-3As shown, the motor housing casting fixture of this utility model includes a fixture base 1 and a motor housing lost mold 2. A support mechanism is installed on the fixture base 1, and the motor housing lost mold 2 is located above the support mechanism. A support rod 6 is installed in the fixture base 1, and a positioning mechanism is rotatably connected to the upper end of the support rod 6. The positioning mechanism includes a threaded cylinder 11, a convex ring 12, a placement groove 13, and a supporting wooden strip 14. The threaded cylinder 11 is rotatably connected to the support rod 6, and a convex ring 12 is connected to the outer side of the threaded cylinder 11. A placement groove 13 is opened on the convex ring 12, and one end of the supporting wooden strip 14 is inserted into the placement groove 13. The other end of the supporting wooden strip 14 is in contact with the inner wall of the opening above the motor housing lost mold 2. The motor housing lost mold 2 is supported on the support mechanism. The supporting wooden block 5 in the support mechanism is not directly attached to the upper wall of the tooling base 1, thus preventing the motor housing from sticking to the tooling base 1 after the lost mold 2 of the motor housing disappears during casting, which would affect the later demolding. The positioning mechanism is installed on the threaded rod 8 through the cooperation between the threaded cylinder 11 and the threaded rod 8, which allows the position of the positioning mechanism to be adjusted, so that this device can be used for lost molds 2 of motor housing of different heights, improving the applicability of this device. At the same time, the length of the supporting wooden strip 14 can also be made according to the diameter of the opening above the lost mold 2 of the motor housing. The length of the supporting wooden strip 14 is equal to the distance between the end of the placement groove 13 near the threaded cylinder 11 and the inner wall of the opening of the lost mold 2 of the motor housing. The outer side of the supporting wooden strip 14 is consistent with that of the supporting wooden block 5, and both are coated with adhesive to adhere to the lost foam 2 of the motor housing, improving the stability of the connection with the lost foam 2 of the motor housing and preventing displacement that would affect the support of the lost foam 2 of the motor housing; the outer wall of the threaded cylinder 11 has a threaded hole 15, and a bolt 16 is connected in the threaded hole 15. The bolt 16 abuts against the side wall of the support rod 6. When filling the molding sand, the sand box needs to be vibrated to make the molding sand filling more complete. In order to prevent the threaded cylinder 11 from rotating during the vibration of the sand box, the threaded hole 15 and the bolt 16 are provided to further fix the position of the threaded cylinder 11 and prevent the threaded cylinder 11 from rotating; The support rod 6 is provided with a crossbar 7, a threaded rod 8 and a positioning hole 9. The crossbar 7 is installed on the inner wall of the tooling base 1. The threaded rod 8 is installed at the center of the upper wall of the crossbar 7. The threaded cylinder 11 is rotatably connected to the threaded rod 8. The side wall of the threaded rod 8 is provided with a positioning hole 9. The bolt 16 can be inserted into the positioning hole 9. The side wall of the threaded rod 8 is provided with multiple positioning holes 9. When the bolt 16 is inserted into the appropriate positioning hole 9, the position of the threaded cylinder 11 can be fixed. The support mechanism includes an insertion hole 4 and a support block 5. The upper wall of the tooling base 1 is provided with an insertion hole 4. The support block 5 is inserted and installed in the insertion hole 4. The outer side of the support block 5 is coated with adhesive. The support block 5 can be attached to the lower wall of the lost foam 2 of the motor housing.A locking nut 17 is rotatably connected to the end of the threaded rod 8. A support rod 18 is provided on the locking nut 17, and a lifting ring 10 is installed on the support rod 18. The locking nut 17 can be used to fix the position of the threaded cylinder 11 again. At the same time, the support rod 18 and the lifting ring 10 above the locking nut 17 can facilitate the removal and transfer of this device. A positioning pin 3 is installed at the bottom of the tooling base 1. The cooperation between the positioning pin 3 and the hole in the inner wall of the external sand box can ensure that this device will not shift after being placed in the sand box.

[0021] Working process or working principle:

[0022] First, insert a support block 5 coated with adhesive into the insertion hole 4 above the tooling base 1. Then, fit the lost foam mold 2 of the motor housing onto the outside of the threaded rod 8, ensuring that the center point of the lost foam mold 2 coincides with the center point of the threaded rod 8. Next, glue the lost foam mold 2 of the motor housing onto the support block 5. Then, rotate the threaded cylinder 11 onto the threaded rod 8. Adjust the position of the threaded cylinder 11 according to the height of the lost foam mold 2. After adjustment, tighten the bolt 16 and insert it into the positioning hole 9. Then, according to the placement... The distance between the end of the groove 13 near the threaded cylinder 11 and the inner wall of the opening of the lost foam 2 of the motor housing is used to cut a support wooden strip 14 of the same length, apply adhesive, and then insert one end of the support wooden strip 14 into the placement groove 13 and glue the other end to the inner side of the opening of the lost foam 2 of the motor housing. Then, the locking nut 17 is rotated and installed on the threaded rod 8, and the position of the threaded cylinder 11 is fixed again by the locking nut 17. Then, the device can be picked up and transferred by the support rod 18 and the lifting ring 10 above the locking nut 17.

[0023] This invention provides support and positioning mechanisms on its tooling base 1 to support and position the lost mold 2 for the motor housing. Simultaneously, the supporting wooden strip 14 is placed in a placement groove 13, which positions the strip to prevent displacement during sand box vibration. This ensures effective support for the lost mold 2 and prevents deformation or damage during refractory coating application, drying, handling, and molding, reducing the likelihood of deformation and breakage and improving the casting quality of the motor housing. Both the supporting wooden strip 14 and the supporting wooden block 5 are made of flammable materials. During casting, the high-temperature molten metal causes the wooden strip to burn and vaporize rapidly, disappearing along with the lost mold 2, facilitating separation of the device from the finished motor housing.

[0024] The descriptions of the orientation and relative positional relationships of the structure in this utility model, such as descriptions of front, back, left, right, up, and down, do not constitute a limitation on this utility model, but are merely for the convenience of description.

Claims

1. A casting fixture for an electric motor housing, characterized in that: It includes a tooling base (1) and a motor housing lost mold (2). A support mechanism is installed on the tooling base (1), and the motor housing lost mold (2) is located above the support mechanism. A support rod (6) is installed in the tooling base (1), and a positioning mechanism is rotatably connected to the upper end of the support rod (6). The positioning mechanism includes a threaded cylinder (11), a convex ring (12), a placement groove (13), and a supporting wooden strip (14). The threaded cylinder (11) is rotatably connected to the support rod (6). The outer side of the threaded cylinder (11) is connected to the convex ring (12). The convex ring (12) has a placement groove (13) on its upper side. One end of the supporting wooden strip (14) is inserted into the placement groove (13), and the other end of the supporting wooden strip (14) is attached to the inner wall of the opening above the lost foam (2) of the motor housing.

2. The motor housing casting fixture according to claim 1, characterized in that: The outer wall of the threaded cylinder (11) is provided with a threaded hole (15), and a bolt (16) is connected in the threaded hole (15). The bolt (16) abuts against the side wall of the support rod (6).

3. The motor housing casting fixture according to claim 2, characterized in that: The support rod (6) is provided with a crossbar (7), a threaded rod (8) and a positioning hole (9). The crossbar (7) is installed on the inner wall of the tooling base (1). The threaded rod (8) is installed at the center of the upper wall of the crossbar (7). The threaded cylinder (11) is rotatably connected to the threaded rod (8). The side wall of the threaded rod (8) is provided with a positioning hole (9). The bolt (16) is inserted into the positioning hole (9).

4. The motor housing casting fixture according to claim 1, characterized in that: The support mechanism includes a socket (4) and a support block (5). The upper wall of the tooling base (1) is provided with a socket (4), and the support block (5) is inserted into the socket (4).

5. The motor housing casting fixture according to claim 3, characterized in that: The threaded rod (8) is rotatably connected to a locking nut (17), and a support rod (18) is provided on the locking nut (17), and a lifting ring (10) is installed on the support rod (18).

6. The motor housing casting fixture according to claim 1, characterized in that: The tooling base (1) is equipped with a positioning pin (3) at its bottom.

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