Pump shell casting sand core assembly

Abstract

The utility model provides a pump casing casting sand core assembly, which relates to the technical field of sand core assemblies, and comprises an upper casing and a lower casing, a plurality of piston rod pipes are arranged in the lower casing, a fastening device is arranged on the outer surface of each piston rod pipe, and the fastening device comprises a first round rod. A sliding rod is slidably connected to the inner wall of the first round rod, a first round block is fixedly connected to one end of the sliding rod, a spring is arranged in the first round rod, a round groove is formed in the piston rod pipe, one end of the first round rod is in threaded connection with one end of the inner wall of the round groove, and a groove is formed in one end of the piston rod pipe. Through the arrangement of the fastening device, when the piston rod pipe is placed in the lower shell, one end of the first round block located in the groove abuts against the inner wall of the lower shell, the position of the piston rod pipe in the lower shell is limited, and the situation that the position of the hydraulic rod pipe deflects, and the pouring effect of a casting is affected is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of sand core components, in particular to a pump casing casting sand core component. Background Art

[0002] A sand core is a component used to form a cavity or complex internal cavities in metal castings. It is typically made of a mixture of sand-like material and a binder to ensure it can withstand the impact and thermal effects of high-temperature molten metal during the casting process while maintaining the desired shape and structure.

[0003] Hydraulic pump sand cores usually consist of two upper and lower shells and an internal hydraulic rod tube. During assembly, the hydraulic rod tube is clamped inside the lower shell, and then the clamping block on the surface of the upper shell is inserted into the slot inside the lower shell to complete the assembly. However, after assembly, since the hydraulic rod tube has no fixed connection with the inner wall of the lower shell, the position of the hydraulic rod tube may be slightly deviated during the movement or use of the sand core, affecting the internal accuracy after the casting is completed. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that after assembly, the hydraulic rod tube has no fixed connection with the inner wall of the lower shell, so the position of the hydraulic rod tube may be slightly deflected during the movement or use of the sand core, affecting the internal accuracy of the casting after production is completed. A pump casing casting sand core assembly is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a pump casing casting sand core assembly, including an upper shell and a lower shell, the bottom end of the upper shell is fixedly connected to a plurality of plug rods, the top of the lower shell is provided with a plurality of slots, the interior of the lower shell is provided with a plurality of piston rod tubes, the outer surface of the piston rod tube is provided with a fastening device, the fastening device includes a first round rod, the inner wall of the first round rod is slidably connected to the sliding rod, one end of the sliding rod is fixedly connected to the first round block, a spring is provided inside the first round rod, the two ends of the spring are respectively fixedly connected to one end of the sliding rod and one end of the inner wall of the first round rod, a circular groove is provided inside the piston rod tube, one end of the first round rod is threadedly connected to one end of the inner wall of the circular groove, one end of the piston rod tube is provided with a groove, and the outer surface of the first round block slides on the inner wall of the groove.

[0006] The effect achieved by the above components is: by setting the sliding rod, when assembling the sand core, the first round rod can be first inserted into the circular groove of the piston rod tube at one end of each piston rod tube, and the first round rod can be pushed to rotate so that one end of the first round rod is threadedly connected to the inner wall of the piston rod tube and the first round rod is fixed to the inside of the piston rod tube, so that the first round block is located inside the groove. When the piston rod tube is placed into the interior of the lower shell, the spring inside the first round rod will push the sliding rod outward, so that one end of the first round block located inside the groove is against the inner wall of the lower shell, thereby limiting the position of the piston rod tube inside the lower shell, and avoiding the position of the hydraulic rod tube from being deflected as much as possible, which affects the casting effect of the casting.

[0007] Preferably, the fastening device further comprises a second round rod, one end of the second round rod is threadedly connected to one end of the inner wall of the circular groove, and one end of the second round rod is fixedly connected to a second round block.

[0008] The effect achieved by the above components is that when using the sand core, the first round rod or the second round rod can be inserted into the circular groove inside the piston rod tube according to needs to adjust whether the position of the piston rod tube needs to be auxiliary tightened.

[0009] Preferably, one end of the first round block and the second round block is respectively provided with an auxiliary groove, and the auxiliary groove is located at one end of the first round block and the second round block away from the sliding rod and the second round rod.

[0010] The effect achieved by the above components is that when removing the sand core, the piston rod tube can be taken out more conveniently at the auxiliary groove.

[0011] Preferably, one end of the first round block and the second round block is respectively fixedly connected with a convex ring, and the convex ring is located at the edge of one end of the first round block and the second round block away from the sliding rod and the second round rod.

[0012] The effect achieved by the above components is that, by providing the convex ring, when one end of the first or second round block abuts against the inner wall of the lower shell, the poured liquid is not easy to enter the auxiliary groove.

[0013] Preferably, the inner wall of the first round rod is fixedly connected to a positioning rod, and the inner wall of the sliding rod slides on the outer surface of the positioning rod.

[0014] The effect achieved by the above components is that when the positioning rod moves to deform the spring, the spring will move outside the positioning rod, and the internal shape of the spring can be reinforced by the positioning rod.

[0015] Preferably, a positioning device is provided at the bottom end of the lower shell, and the positioning device includes two U-shaped rods, and two connecting rods are fixedly connected to the side where the two U-shaped rods are close to each other, and the distance between the two ends of the U-shaped rods is slightly larger than the outer surface width of the lower shell and the upper shell.

[0016] The effect achieved by the above components is: when splicing the lower shell and the upper shell, the lower shell can be placed above the two U-shaped rods and between the two ends of the U-shaped rods first, and then the edges of the two sides of the upper shell can be fitted between the two ends of the two U-shaped rods, and the insertion rod at the bottom end of the upper shell can be inserted into the slot at the top end of the lower shell to limit the angle between the upper shell and the lower shell, making it easier to splice the upper shell and the lower shell.

[0017] Preferably, both ends of the U-shaped rod are fixedly connected to oblique rods, and one end of the oblique rod away from the U-shaped rod is fixedly connected to one side of the curved rod.

[0018] The effect achieved by the above components is that by arranging the diagonal rod, the lower portion of the connection between the connecting rod and the U-shaped rod can be supported and reinforced, thereby avoiding deflection and fracture of the connection between the U-shaped rod and the connecting rod as much as possible.

[0019] Preferably, the outer surface of the connecting rod is fixedly connected to a curved rod, and the outer surface of the curved rod is in an arc shape.

[0020] The effect achieved by the above components is that after the upper shell and the lower shell are spliced together with the help of the positioning device, the lower shell can be lifted at the curved rod, and the two U-shaped rods can be lifted more conveniently by holding the two curved rods.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are:

[0022] In the utility model, by providing a fastening device, when the piston rod tube is placed into the interior of the lower shell, one end of the first round block located inside the groove is abutted against the inner wall of the lower shell, thereby limiting the position of the piston rod tube inside the lower shell and avoiding as much as possible the position of the hydraulic rod tube from being deflected, which would affect the casting effect of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the three-dimensional structure of the upper shell of the utility model;

[0025] Figure 3 This is a schematic diagram of a partial cross-section of the three-dimensional structure of the piston rod tube of the utility model;

[0026] Figure 4 This is a schematic diagram of a partial cross-section of the three-dimensional structure of the first round rod of the utility model;

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the second round rod of the utility model.

[0028] Legend: 1. Upper shell; 2. Fastening device; 3. Positioning device; 4. Lower shell; 5. Slot; 6. Insert rod; 7. Piston rod tube; 21. Round groove; 22. First round rod; 23. Groove; 24. Spring; 25. Sliding rod; 26. First round block; 27. Positioning rod; 28. Auxiliary groove; 29. Convex ring; 210. Second round rod; 211. Second round block; 31. U-shaped rod; 32. Connecting rod; 33. Oblique rod; 34. Bending rod. DETAILED DESCRIPTION

[0029] Example 1, as Figure 1-4 As shown, a pump casing casting sand core assembly includes an upper shell 1 and a lower shell 4, the bottom end of the upper shell 1 is fixedly connected to a plurality of plug rods 6, the top of the lower shell 4 is provided with a plurality of card slots 5, the interior of the lower shell 4 is provided with a plurality of piston rod tubes 7, the outer surface of the piston rod tube 7 is provided with a fastening device 2, the fastening device 2 includes a first round rod 22, the inner wall of the first round rod 22 is slidably connected with a sliding rod 25, one end of the sliding rod 25 is fixedly connected with a first round block 26, a spring 24 is provided inside the first round rod 22, the two ends of the spring 24 are respectively fixedly connected to one end of the sliding rod 25 and one end of the inner wall of the first round rod 22, a circular groove 21 is provided inside the piston rod tube 7, one end of the first round rod 22 is threadedly connected to one end of the inner wall of the circular groove 21, and a groove 23 is provided at one end of the piston rod tube 7. The outer surface of the round block 26 slides on the inner wall of the groove 23. By setting the sliding rod 25, when assembling the sand core, the first round rod 22 can be inserted into the circular groove 21 of the piston rod tube 7 at one end of each piston rod tube 7, and the first round rod 22 can be pushed to rotate so that one end of the first round rod 22 is threadedly connected to the inner wall of the piston rod tube 7 and the first round rod 22 is fixed to the inside of the piston rod tube 7, so that the first round block 26 is located inside the groove 23. When the piston rod tube 7 is placed into the interior of the lower shell 4, the spring 24 inside the first round rod 22 will push the sliding rod 25 outward, so that one end of the first round block 26 located inside the groove 23 is against the inner wall of the lower shell 4, thereby limiting the position of the piston rod tube 7 inside the lower shell 4 and avoiding the deviation of the position of the hydraulic rod tube as much as possible, which affects the casting effect of the casting.

[0030] Reference Figure 2-5 As shown, in this embodiment: the fastening device 2 also includes a second round rod 210, one end of the second round rod 210 is threadedly connected to one end of the inner wall of the circular groove 21, and one end of the second round rod 210 is fixedly connected to a second round block 211. When using a sand core, the first round rod 22 or the second round rod 210 can be inserted into the circular groove 21 inside the piston rod tube 7 as needed to adjust whether the position of the piston rod tube 7 needs to be auxiliary fastened.

[0031] Reference Figure 2-5As shown, in this embodiment: an auxiliary groove 28 is respectively provided at one end of the first circular block 26 and the second circular block 211, and the auxiliary groove 28 is located at one end of the first circular block 26 and the second circular block 211 away from the sliding rod 25 and the second circular rod 210. When removing the sand core, the piston rod tube 7 can be more conveniently taken out at the auxiliary groove 28, and one end of the first circular block 26 and the second circular block 211 is respectively fixedly connected with a convex ring 29, which is located at the edge of one end of the first circular block 26 and the second circular block 211 away from the sliding rod 25 and the second circular rod 210. By providing the convex ring 29, when one end of the first circular block 26 or the second circular block 211 is against the inner wall of the lower shell 4, the cast liquid is not easy to enter the auxiliary groove 28.

[0032] Reference Figure 2-5 As shown, in this embodiment: the inner wall of the first round rod 22 is fixedly connected with a positioning rod 27, and the inner wall of the sliding rod 25 slides on the outer surface of the positioning rod 27. When the positioning rod 27 moves to deform the spring 24, the spring 24 will move on the outside of the positioning rod 27. The internal shape of the spring 24 can be reinforced by the positioning rod 27.

[0033] Reference Figure 1-2 As shown, in this embodiment: a positioning device 3 is provided at the bottom end of the lower shell 4, and the positioning device 3 includes two U-shaped rods 31, and two connecting rods 32 are fixedly connected to the side where the two U-shaped rods 31 are close to each other. The distance between the two ends of the U-shaped rod 31 is slightly larger than the outer surface width of the lower shell 4 and the upper shell 1. When splicing the lower shell 4 with the upper shell 1, the lower shell 4 can be placed above the two U-shaped rods 31 and between the two ends of the U-shaped rods 31. Then, the edges on both sides of the upper shell 1 are fitted between the two ends of the two U-shaped rods 31, and the insertion rod 6 at the bottom end of the upper shell 1 is inserted into the slot 5 at the top end of the lower shell 4 to limit the angle between the upper shell 1 and the lower shell 4, so as to facilitate splicing the upper shell 1 and the lower shell 4.

[0034] Reference Figure 1-2 As shown, in this embodiment: both ends of the U-shaped rod 31 are fixedly connected with an oblique rod 33, and the end of the oblique rod 33 away from the U-shaped rod 31 is fixedly connected to one side of the curved rod 34. By arranging the oblique rod 33, the lower part of the connection between the connecting rod 32 and the U-shaped rod 31 can be supported and reinforced, and the connection between the U-shaped rod 31 and the connecting rod 32 can be avoided as much as possible. The outer surface of the connecting rod 32 is fixedly connected with the curved rod 34, and the outer surface shape of the curved rod 34 is arc-shaped. After the upper shell 1 and the lower shell 4 are spliced together with the help of the positioning device 3, the lower shell 4 can be lifted at the curved rod 34, and the two U-shaped rods 31 can be lifted more conveniently by holding the two curved rods 34.

[0035] Working principle: When using the sand core, first place the lower shell 4 above the two U-shaped rods 31 and between the two ends of the U-shaped rods 31. At one end of each piston rod tube 7, insert the first round rod 22 into the circular groove 21 of the piston rod tube 7. Push the first round rod 22 to rotate so that one end of the first round rod 22 is threadedly connected to the inner wall of the piston rod tube 7 and fix the first round rod 22 inside the piston rod tube 7 so that the first round block 26 is located inside the groove 23. Alternatively, insert the second round rod 210 into the circular groove 21 inside the piston rod tube 7 and connect the second round rod 210 to the piston rod tube 7. When the piston rod tube 7 of 22 is placed into the interior of the lower shell body 4, the spring 24 inside the first round rod 22 will push the sliding rod 25 outward, so that one end of the first round block 26 located inside the groove 23 will rest against the inner wall of the lower shell body 4, thereby limiting the position of the piston rod tube 7 inside the lower shell body 4. Subsequently, the edges on both sides of the upper shell body 1 are fitted between the two ends of the two U-shaped rods 31, and the insertion rod 6 at the bottom end of the upper shell body 1 is inserted into the slot 5 at the top end of the lower shell body 4 to limit the angle between the upper shell body 1 and the lower shell body 4. After the splicing is completed, the lower shell body 4 is lifted at the bending rod 34 to take out the sand core assembly.

[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present invention that does not deviate from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A pump casing casting sand core assembly, comprising an upper casing (1) and a lower casing (4), characterized in that: The bottom end of the upper shell (1) is fixedly connected to a plurality of insertion rods (6), the top end of the lower shell (4) is provided with a plurality of card slots (5), the interior of the lower shell (4) is provided with a plurality of piston rod tubes (7), the outer surface of the piston rod tube (7) is provided with a fastening device (2), the fastening device (2) comprises a first round rod (22), the inner wall of the first round rod (22) is slidably connected to a sliding rod (25), one end of the sliding rod (25) is fixedly connected to a first round block (26), a spring (24) is provided inside the first round rod (22), the two ends of the spring (24) are respectively fixedly connected to one end of the sliding rod (25) and one end of the inner wall of the first round rod (22), a circular groove (21) is provided inside the piston rod tube (7), one end of the first round rod (22) is threadedly connected to one end of the inner wall of the circular groove (21), one end of the piston rod tube (7) is provided with a groove (23), and the outer surface of the first round block (26) slides on the inner wall of the groove (23).

2. A pump casing casting sand core assembly according to claim 1, characterized in that: The fastening device (2) further comprises a second round rod (210), one end of the second round rod (210) being threadedly connected to one end of the inner wall of the circular groove (21), and one end of the second round rod (210) being fixedly connected to a second round block (211).

3. A pump casing casting sand core assembly according to claim 2, characterized in that: An auxiliary groove (28) is respectively formed at one end of the first round block (26) and the second round block (211). The auxiliary groove (28) is located at one end of the first round block (26) and the second round block (211) away from the sliding rod (25) and the second round rod (210).

4. A pump casing casting sand core assembly according to claim 3, characterized in that: One end of the first round block (26) and the second round block (211) is fixedly connected to a convex ring (29), respectively. The convex ring (29) is located at an edge of one end of the first round block (26) and the second round block (211) away from the sliding rod (25) and the second round rod (210).

5. The pump casing casting sand core assembly according to claim 4, characterized in that: The inner wall of the first round rod (22) is fixedly connected to a positioning rod (27), and the inner wall of the sliding rod (25) slides on the outer surface of the positioning rod (27).

6. A pump casing casting sand core assembly according to claim 5, characterized in that: A positioning device (3) is provided at the bottom end of the lower shell (4), and the positioning device (3) comprises two U-shaped rods (31). Two connecting rods (32) are fixedly connected to the sides of the two U-shaped rods (31) that are close to each other, and the distance between the two ends of the U-shaped rods (31) is slightly larger than the width of the outer surfaces of the lower shell (4) and the upper shell (1).

7. A pump casing casting sand core assembly according to claim 6, characterized in that: Both ends of the U-shaped rod (31) are fixedly connected to oblique rods (33), and one end of the oblique rod (33) away from the U-shaped rod (31) is fixedly connected to one side of the curved rod (34).

8. The pump casing casting sand core assembly according to claim 6, characterized in that: The outer surface of the connecting rod (32) is fixedly connected to a curved rod (34), and the outer surface of the curved rod (34) is in an arc shape.

Images