Brake drum casting sand mold forming device

Abstract

The utility model discloses a brake drum casting sand mold forming device, and relates to the technical field of sand mold casting. The brake drum casting sand mold forming device comprises an L-shaped base, a bottom mold and a top mold, the bottom mold and the top mold are arranged on the upper surface of the L-shaped base, and two corresponding sand mold cores matched with a brake drum are arranged in the bottom mold and the top mold respectively; the driving assembly is used for driving the top die and the bottom die to be automatically closed; and the pressing assembly is used for driving the top die to press downwards. Through the arrangement of the driving assembly, the pressing assembly and the positioning assembly, when the device is used for casting the brake drum, the top mold can be automatically driven to enter the position over the bottom mold, and after the top mold automatically moves downwards to be pressed with the bottom mold, slurry is poured through the pouring pipe on the upper surface of the top mold, and sand mold forming of the brake drum is achieved; and therefore, the defect that in the prior art, die assembly cannot be quickly carried out is effectively overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of sand mold casting, in particular to a brake drum casting sand mold forming device. Background Art

[0002] The brake drum is a friction coupler of the drum brake. In addition to having the strength and rigidity required as a component, it should also have a friction coefficient as high and stable as possible, as well as appropriate wear resistance, heat resistance, heat dissipation and heat capacity. The existing patent is a sand mold casting demoulding device, patent announcement number CN214557319U, which includes a bottom plate, a bottom mold and a top mold. The bottom mold is fixedly connected to the middle position of the top of the bottom plate, the top of the bottom mold contacts the top mold, both sides of the top mold are fixedly connected to guide rods, the bottom end of the outer side wall of the guide rod is fixedly connected to a limiting slider, and both sides of the bottom end of the bottom plate are fixedly connected to an adjustment structure. The utility model improves the stability of the device by providing an anti-shake structure. As the top mold moves up and down for fixation and mold opening, the guide rod will slide up and down accordingly inside the insert tube, and a plurality of groups of limit sliders are distributed at the bottom end of the outer side wall of the anti-shake structure. When the guide rod slides, the limit slider will also slide simultaneously inside the limit slide groove. Since the limit slide groove fits with the limit slider, the guide rod remains relatively stable, thereby preventing the top mold from shaking during the demoulding process.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: in the above-mentioned device, before forming the brake drum, it is necessary to sandblast the inside of the top mold and the bottom mold separately, so that a casting cavity with the same shape as the brake drum is formed in the middle of the top mold and the bottom mold, and then the top mold and the bottom mold are manually stacked and merged (i.e., mold closing) for pouring and grouting. During the whole process, manual operation is required, and the process is relatively cumbersome. That is, the technical solution proposed by the above-mentioned patent technology has the defect that the mold cannot be closed quickly.

[0004] Therefore, we propose a brake drum casting sand mold forming device to solve the above-mentioned problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a brake drum casting sand mold forming device, which solves the defect that the mold cannot be closed quickly.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a brake drum casting sand mold forming device, comprising:

[0007] An L-shaped base, and a bottom mold and a top mold arranged on the upper surface of the L-shaped base, and two sand mold cores adapted to and corresponding to the brake drum are respectively arranged inside the bottom mold and the top mold;

[0008] A driving assembly, which is used to drive the top mold and the bottom mold to automatically close, the driving assembly includes a rotating opening opened at the top of the L-shaped base, and a rotating shaft rotatably arranged on the inner wall of the rotating opening, a connecting plate is fixedly arranged on the surface of the rotating shaft, and a mounting frame is fixedly arranged at the end of the connecting plate, the top mold is slidably arranged inside the mounting frame, and the driving assembly also includes a stepping motor arranged on the front of the L-shaped base for driving the rotating shaft to rotate;

[0009] A pressing assembly, which is used to drive the top mold to press down, and the pressing assembly includes two synchronous motors arranged on the upper surface of the mounting frame to drive the top mold to move up and down;

[0010] The positioning assembly is used to fix the bottom mold and the installation frame after the top mold and the bottom mold are pressed together.

[0011] Preferably, a driving gear disc is fixedly provided at the output end of the stepper motor, and one end of the rotating shaft extends to the front side of the L-shaped base and is fixedly provided with a driven gear disc meshing with the driving gear disc.

[0012] Preferably, the pressing assembly further comprises an annular groove formed on the inner annular surface of the mounting frame, and an annular plate slidably disposed on the inner wall of the annular groove, wherein the inner annular surface of the annular plate is fixedly connected to the outer surface of the top mold.

[0013] Preferably, the inner wall of the annular groove is rotatably provided with two symmetrical threaded columns, and the inner wall of the annular groove is fixedly provided with two groups of symmetrical limit rods, the upper surface of the annular plate is respectively provided with threaded holes threadedly connected to the outer surfaces of the two threaded columns, and sliding holes slidably connected to the outer surfaces of the two groups of limit rods, and the output ends of the two synchronous motors extend into the interior of the annular groove and are respectively fixedly connected to the top ends of the two threaded columns.

[0014] Preferably, the positioning assembly further comprises two groups of fixing blocks symmetrically fixed on the lower surface of the mounting frame, and a lead screw is rotatably arranged in the middle of each group of fixing blocks.

[0015] Preferably, the bottom end of the threaded column extends to the lower surface of the mounting frame and is fixedly provided with a rotating rod, and the bottom end of the rotating rod and the surface of the lead screw are both fixedly provided with mutually meshing bevel gears.

[0016] Preferably, two symmetrical L-shaped positioning blocks are slidably provided on the lower surface of the mounting frame, and threaded holes threadedly connected to the outer surface of the lead screw are provided on the sides of the L-shaped positioning blocks. Connecting blocks are fixedly provided on the two side surfaces of the bottom mold, and positioning grooves matching the ends of the L-shaped positioning blocks are provided on the sides of the connecting blocks.

[0017] Beneficial Effects

[0018] The utility model provides a brake drum casting sand mold forming device. Compared with the prior art, it has the following beneficial effects:

[0019] The brake drum casting sand mold forming device is provided with a driving component, a pressing component and a positioning component, so that when casting the brake drum, the device can automatically drive the top mold to enter the top of the bottom mold, and can automatically move downward to press the bottom mold, and then pour the slurry through the pouring pipe on the upper surface of the top mold to realize the sand mold forming of the brake drum, thereby effectively solving the defect of the inability to quickly close the mold in the prior art. At the same time, during the rotation of the threaded column, the bottom mold and the top mold can be effectively locked and positioned, thereby effectively improving the stability of the top mold and the bottom mold after pressing, and ensuring the quality of the brake drum after forming. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a side view of the structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the utility model;

[0023] Figure 4 For this utility model Figure 3 Enlarged structural diagram at A in the middle.

[0024] In the figure:

[0025] 100, L-shaped base;

[0026] 200, bottom mold;

[0027] 300, top mold;

[0028] 400, driving assembly; 401, rotating shaft; 402, connecting plate; 403, mounting frame; 404, stepping motor; 405, driving gear disc; 406, driven gear disc;

[0029] 500, press-fit assembly; 501, synchronous motor; 502, annular plate; 503, threaded column; 504, limit rod;

[0030] 600, positioning assembly; 601, lead screw; 602, rotating rod; 603, bevel gear; 604, L-shaped positioning block; 605, connecting block; 606, positioning groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Embodiment 1

[0033] See also Figure 1-4 The utility model provides a technical solution: a brake drum casting sand mold forming device, comprising:

[0034] An L-shaped base 100, and a bottom mold 200 and a top mold 300 arranged on the upper surface of the L-shaped base 100, and two sand mold cores adapted and corresponding to the brake drum are respectively arranged inside the bottom mold 200 and the top mold 300;

[0035] A driving assembly 400, which is used to drive the top mold 300 and the bottom mold 200 to automatically close, the driving assembly 400 includes a rotating opening opened at the top of the L-shaped base 100, and a rotating shaft 401 rotatably arranged on the inner wall of the rotating opening, a connecting plate 402 is fixedly arranged on the surface of the rotating shaft 401, and a mounting frame 403 is fixedly arranged at the end of the connecting plate 402, and the top mold 300 is slidably arranged inside the mounting frame 403, and the driving assembly 400 also includes a stepping motor 404 arranged on the front of the L-shaped base 100 for driving the rotating shaft 401 to rotate;

[0036] A driving gear 405 is fixedly provided at the output end of the stepper motor 404 , and one end of the rotating shaft 401 extends to the front of the L-shaped base 100 and is fixedly provided with a driven gear 406 meshing with the driving gear 405 , so that the deceleration rotation of the mounting frame 403 can be achieved through the rotation of the stepper motor 404 .

[0037] A pressing assembly 500, which is used to drive the top mold 300 to press down. The pressing assembly 500 includes two synchronous motors 501 arranged on the upper surface of the mounting frame 403 and used to drive the top mold 300 to move up and down;

[0038] The pressing assembly 500 also includes an annular groove opened on the inner ring surface of the installation frame 403, and an annular plate 502 slidably arranged on the inner wall of the annular groove. The inner ring surface of the annular plate 502 is fixedly connected to the outer surface of the top mold 300 to facilitate the lifting and lowering of the top mold 300.

[0039] Two symmetrical threaded columns 503 are rotatably arranged on the inner wall of the annular groove, and two groups of symmetrical limiting rods 504 are fixedly arranged on the inner wall of the annular groove. The setting of the limiting rods 504 ensures the stability of the annular plate 502 during the lifting and lowering process. The upper surface of the annular plate 502 is respectively provided with threaded holes threadedly connected to the outer surfaces of the two threaded columns 503, and sliding holes slidably connected to the outer surfaces of the two groups of limiting rods 504. The output ends of the two synchronous motors 501 extend to the interior of the annular groove and are respectively fixedly connected to the top ends of the two threaded columns 503.

[0040] In the present embodiment, the brake drum casting sand mold forming device is provided with a driving assembly 400 and a pressing assembly 500, so that when casting the brake drum, the device can automatically drive the top mold 300 to enter directly above the bottom mold 200, and can automatically move downward to be pressed with the bottom mold 200, and then pour slurry through the pouring pipe on the upper surface of the top mold 300 to realize sand mold forming of the brake drum, thereby effectively solving the defect of the prior art that the mold cannot be closed quickly.

[0041] Embodiment 2

[0042] On the basis of the first embodiment, and different from the first embodiment,

[0043] A brake drum casting sand mold forming device, further comprising:

[0044] The positioning assembly 600 is used to fix the bottom mold 200 and the installation frame 403 after the top mold 300 and the bottom mold 200 are pressed together.

[0045] The positioning assembly 600 further includes two groups of fixing blocks symmetrically fixed on the lower surface of the installation frame 403, and a lead screw 601 is rotatably arranged in the middle of each group of fixing blocks.

[0046] The bottom end of the threaded column 503 extends to the lower surface of the mounting frame 403 and is fixedly provided with a rotating rod 602 , and the bottom end of the rotating rod 602 and the surface of the lead screw 601 are both fixedly provided with mutually meshing bevel gears 603 .

[0047] Two symmetrical L-shaped positioning blocks 604 are slidably provided on the lower surface of the mounting frame 403, and threaded holes are provided on the sides of the L-shaped positioning blocks 604 for threaded connection with the outer surface of the lead screw 601. Connecting blocks 605 are fixedly provided on the two side surfaces of the bottom mold 200, and positioning grooves 606 are provided on the sides of the connecting blocks 605 for matching with the ends of the L-shaped positioning blocks 604.

[0048] In this embodiment, by setting a positioning assembly 600, during the rotation of the threaded column 503, the end of the L-shaped positioning block 604 can be driven to insert into the positioning groove 606 on the connecting block 605 on the bottom mold 200, thereby achieving effective locking and positioning of the bottom mold 200 and the top mold 300, thereby effectively improving the stability of the top mold 300 and the bottom mold 200 after pressing, and ensuring the quality of the brake drum after forming.

[0049] When the device is working, when casting the brake drum, the upper and lower sand core models of the brake drum can be placed inside the bottom mold 200 and the top mold 300, and the stepper motor 404 is started. The rotation of the stepper motor 404 drives the active gear plate 405 to rotate, and the rotation of the active gear plate 405 drives the driven gear plate 406 and the rotating shaft 401 to rotate. The rotation of the rotating shaft 401 drives the connecting plate 402 and the mounting frame 403 to rotate, thereby driving the top mold 300 to rotate to the top of the bottom mold 200, and then the two synchronous motors 501 are started. The rotation of the two synchronous motors 501 drives the two threaded columns 503 to rotate simultaneously, and the threaded columns 50 The rotation of the annular plate 502 drives the downward movement of the top mold 300, thereby driving the top mold 300 to move downward and press it with the bottom mold 200, and then the slurry is poured through the pouring pipe on the upper surface of the top mold 300 to realize the sand mold forming of the brake drum. At the same time, during the rotation of the threaded column 503, the rotating rod 602 can be driven to rotate. The rotation of the rotating rod 602 drives the lead screw 601 to rotate under the action of the two bevel gears 603. The rotation of the lead screw 601 drives the end of the L-shaped positioning block 604 to insert into the positioning groove 606 on the connecting block 605 on the bottom mold 200, thereby realizing the effective locking and positioning of the bottom mold 200 and the top mold 300.

[0050] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A brake drum casting sand mold forming device, characterized in that: include, An L-shaped base (100), and a bottom mold (200) and a top mold (300) arranged on the upper surface of the L-shaped base (100), wherein two sand mold cores corresponding to and matching the brake drum are respectively arranged inside the bottom mold (200) and the top mold (300); A driving assembly (400) for driving the top mold (300) and the bottom mold (200) to automatically close, the driving assembly (400) comprising a rotating opening formed at the top of the L-shaped base (100), and a rotating shaft (401) rotatably arranged on the inner wall of the rotating opening, a connecting plate (402) being fixedly arranged on the surface of the rotating shaft (401), a mounting frame (403) being fixedly arranged at the end of the connecting plate (402), the top mold (300) being slidably arranged inside the mounting frame (403), and the driving assembly (400) further comprising a stepping motor (404) arranged on the front of the L-shaped base (100) for driving the rotating shaft (401) to rotate; A pressing assembly (500) for driving the top mold (300) to press downward, the pressing assembly (500) comprising two synchronous motors (501) arranged on the upper surface of the mounting frame (403) for driving the top mold (300) to move up and down; A positioning assembly (600) is used to fix the bottom mold (200) and the installation frame (403) after the top mold (300) and the bottom mold (200) are pressed together.

2. A brake drum casting sand mold forming device according to claim 1, characterized in that: The output end of the stepper motor (404) is fixedly provided with a driving gear disc (405), and one end of the rotating shaft (401) extends to the front side of the L-shaped base (100) and is fixedly provided with a driven gear disc (406) that meshes with the driving gear disc (405).

3. A brake drum casting sand mold forming device according to claim 1, characterized in that: The pressing assembly (500) further comprises an annular groove formed on the inner annular surface of the installation frame (403), and an annular plate (502) slidably disposed on the inner wall of the annular groove, wherein the inner annular surface of the annular plate (502) is fixedly connected to the outer surface of the top mold (300).

4. A brake drum casting sand mold forming device according to claim 3, characterized in that: Two symmetrical threaded columns (503) are rotatably arranged on the inner wall of the annular groove, and two groups of symmetrical limiting rods (504) are fixedly arranged on the inner wall of the annular groove. The upper surface of the annular plate (502) is respectively provided with threaded holes threadedly connected to the outer surfaces of the two threaded columns (503), and sliding holes slidably connected to the outer surfaces of the two groups of limiting rods (504). The output ends of the two synchronous motors (501) extend into the interior of the annular groove and are respectively fixedly connected to the top ends of the two threaded columns (503).

5. A brake drum casting sand mold forming device according to claim 4, characterized in that: The positioning assembly (600) further comprises two groups of fixing blocks symmetrically fixed on the lower surface of the installation frame (403), and a lead screw (601) is rotatably arranged in the middle of each group of fixing blocks.

6. A brake drum casting sand mold forming device according to claim 5, characterized in that: The bottom end of the threaded column (503) extends to the lower surface of the mounting frame (403) and is fixedly provided with a rotating rod (602), and the bottom end of the rotating rod (602) and the surface of the lead screw (601) are both fixedly provided with mutually meshing bevel gears (603).

7. A brake drum casting sand mold forming device according to claim 6, characterized in that: Two symmetrical L-shaped positioning blocks (604) are slidably provided on the lower surface of the installation frame (403), and threaded holes are provided on the sides of the L-shaped positioning blocks (604) for threaded connection with the outer surface of the lead screw (601). Connecting blocks (605) are fixedly provided on the two side surfaces of the bottom mold (200), and positioning grooves (606) are provided on the sides of the connecting blocks (605) for matching with the ends of the L-shaped positioning blocks (604).

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