Floating mechanism and core making equipment

Abstract

The utility model relates to the technical field of core making equipment, in particular to a floating mechanism and core making equipment. The core making equipment comprises a moving mechanism and an execution structure mounted on the moving mechanism, and the execution structure is a sand shooting head or a blowing cover; the floating mechanism comprises a guide rod and a fixing seat, the guide rod is slidably mounted on the moving mechanism, the fixing seat is mounted on the executing mechanism, a clamping groove is formed between the fixing seat and the executing mechanism, a clamping block is arranged at the lower end of the guide rod and clamped in the clamping groove, and a gap is reserved between the clamping block and the clamping groove. In the core making equipment provided by the invention, the execution structure is suspended at the lower end of the guide rod, and the execution structure can float relative to the guide rod; according to the arrangement, the execution structure realizes positioning and guiding by virtue of self weight when the mold is closed, and the execution structure can float according to the overlap ratio deviation, so that the abrasion of a mold positioning pin and sleeve can be reduced, the service life of the mold pin and sleeve is prolonged, and the quality of a sand core is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of core making equipment, in particular to a floating mechanism and a core making equipment. Background Art

[0002] The core making equipment can uniformly inject molding sand into a sand box by using compressed air for pre-compaction, and then apply pressure for compaction. The core making equipment includes a moving mechanism, a sand shooting head and a blowing hood which are slidably mounted on the moving mechanism. Among them: the sand shooting head is used for spraying molding sand; the blowing hood is used for blowing air outwards for core curing; the moving mechanism is used for driving the sand shooting head and the blowing hood to move in space to realize the switching between sand shooting and core curing.

[0003] In the existing core making equipment, the fixing method of the sand shooting head and the blowing hood generally adopts the cooperation of screws and cylindrical pins with a guide rod for fixing, and the positioning when the sand shooting head and the blowing hood descend for mold closing depends on the forced extrusion of a hydraulic cylinder. Due to the deviation of the coincidence degree, the mold positioning pins and sleeves wear quickly, and the service life is relatively short. Seriously, the nozzle will be damaged, affecting the quality of the core. Summary of the Utility Model

[0004] The first object of the utility model is to provide a floating mechanism to solve the technical problems existing in the existing core making equipment, that is, the positioning when the sand shooting head or the blowing hood descends for mold closing depends on the forced extrusion of a hydraulic cylinder, which cannot be compatible with the deviation of the coincidence degree, resulting in rapid wear of the mold positioning pins and sleeves, relatively short service life, and affecting the quality of the core.

[0005] In order to achieve the above object, the utility model adopts the following technical scheme:

[0006] A floating mechanism is applied to a core making equipment. The core making equipment includes a moving mechanism and an execution structure mounted on the moving mechanism. The execution structure is a sand shooting head or a blowing hood. The floating mechanism includes a guide rod and a fixed seat. The guide rod is slidably mounted on the moving mechanism. The fixed seat is mounted on the execution structure, and a clamping groove is formed between the two. A clamping block is arranged at the lower end of the guide rod, and the clamping block is clamped in the clamping groove, and there is a gap between the clamping block and the clamping groove.

[0007] Furthermore, it further includes a floating bearing, and the floating bearing is connected between the guide rod and the fixed seat.

[0008] Furthermore, the floating bearing is a one-way floating bearing.

[0009] Furthermore, a through hole is formed through the fixed seat. The through hole includes a first part and a second part which are connected in a stepped manner. The upper end of the guide rod passes out of the first part, and the second part and the execution structure form the clamping groove.

[0010] Further, the through hole further includes a third portion connected between the first portion and the second portion, and the apertures of the first portion, the third portion, and the second portion increase in sequence. The upper cover of the floating bearing is fitted with the third portion, and the lower cover of the floating bearing is fitted with the guide rod.

[0011] Further, a dust-proof ring is also included. The dust-proof ring is sleeved on the guide rod and seals the gap between the guide rod and the first portion.

[0012] Further, a positioning pin installed on the actuating structure is also included. The positioning pin is used for plug-in fit with a positioning hole on the moving mechanism.

[0013] Further, a bushing installed in the positioning hole is also included. The bushing is used for plug-in fit with the positioning pin.

[0014] Further, the positioning pin includes a positioning boss and a mounting flange arranged on the periphery of the positioning boss, wherein: the positioning boss is conical and its tip faces the positioning hole; the mounting flange is fixed on the actuating structure.

[0015] The second object of the present utility model is to provide a core-making device, which includes a moving mechanism, an actuating structure, and the floating mechanism according to any one of the above;

[0016] The number of the actuating structures is two and they are respectively a sand shooting head or a blowing hood;

[0017] Two floating mechanisms are provided. One of the floating mechanisms is connected between the moving mechanism and the sand shooting head, and the other floating mechanism is connected between the moving mechanism and the blowing hood.

[0018] The beneficial effects of the present utility model:

[0019] The embodiment of the present utility model provides a floating mechanism applied to a core-making device. The core-making device includes a moving mechanism and an actuating structure installed on the moving mechanism. The actuating structure is a sand shooting head or a blowing hood; the floating mechanism includes a guide rod and a fixed seat. The guide rod is slidably installed on the moving mechanism. The fixed seat is installed on the actuating structure and a clamping groove is formed therebetween. A clamping block is arranged at the lower end of the guide rod, and the clamping block is clamped in the clamping groove, and there is a gap between the clamping block and the clamping groove.

[0020] In the floating mechanism provided by the present application, the clamping block at the lower end of the guide rod is clamped in the clamping groove, so that the actuating structure is suspended at the lower end of the guide rod; there is a gap between the clamping block and the clamping groove, so the clamping block can float in the clamping groove, and then the actuating structure can float relative to the guide rod. With the above floating mechanism, the actuating structure realizes positioning and guiding by its own weight when the mold is closed, and the actuating structure can float according to the coincidence deviation, so as to reduce the wear of the mold positioning pins and sleeves, improve the service life of the mold pins and sleeves, and ensure the quality of the sand core. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Structural schematic diagram of the floating mechanism provided by the first aspect embodiment of the present invention;

[0023] Figure 2 For Figure 1 Cross-section at A Figure 1 ;

[0024] Figure 3 Cross-sectional view of the fixed seat provided by the first aspect embodiment of the present invention;

[0025] Figure 4 For Figure 1 Cross-section at A Figure 2 ;

[0026] Figure 5 For Figure 1 Cross-sectional view at B;

[0027] Figure 6 Schematic diagram of a partial structure of the core-making equipment provided by the second aspect embodiment of the present invention.

[0028] Icon:

[0029] 1 - Floating mechanism; 11 - Guide rod; 111 - Clamping block; 12 - Fixed seat; 121 - First part; 122 - Second part; 123 - Third part; 124 - Annular boss; 13 - Clamping groove; 14 - Floating bearing; 15 - Dust-proof ring; 16 - Positioning pin; 161 - Positioning boss; 162 - Mounting flange; 17 - Pin sleeve;

[0030] 100 - Moving mechanism; 101 - Positioning hole;

[0031] 200 - Sand injection head;

[0032] 300 - Blowing hood;

[0033] 400 - Mold core box. Detailed implementation manners

[0034] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be noted that in the description of the present utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0036] It should be noted that in the description of the present utility model, the terms "connection" and "installation" 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 directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] The core-making equipment includes a moving mechanism 100 and an execution structure installed on the moving mechanism 100. The execution structure is a sand-blowing head 200 or a blowing hood 300. Among them, the sand-blowing head 200 is used for spraying molding sand; the blowing hood 300 is used for blowing air outwards for core curing; the moving mechanism 100 is used for driving the execution structure to move in space.

[0038] In the existing core-making equipment, a guide rod is provided between the moving mechanism 100 and the execution structure. The guide rod is slidably installed on the moving mechanism 100, and the execution structure is fixed to the lower end of the guide rod through fasteners such as screws and pins. Since the execution structure and the guide rod are fixedly connected in a rigid manner, the execution structure cannot be compatible with the coincidence deviation when descending and closing the mold, resulting in relatively fast wear of the mold locating pins and sleeves, short service life, and affecting the quality of the core.

[0039] Based on this, the first aspect embodiment of the present utility model provides a floating mechanism 1 applied to core-making equipment. Refer to Figure 1and Figure 2 The floating mechanism 1 includes a guide rod 11 and a fixed seat 12. The guide rod 11 is slidably mounted on the moving mechanism 100. The fixed seat 12 is installed on the actuating structure, and a clamping groove 13 is formed therebetween. A clamping block 111 is provided at the lower end of the guide rod 11. The clamping block 111 is clamped in the clamping groove 13, and there is a gap between the clamping block 111 and the clamping groove 13.

[0040] It should be noted that the actuating structure can be a sand shooting head 200 or a blowing hood 300. That is, the floating mechanism 1 can be connected between the moving mechanism 100 and the sand shooting head 200, or can be connected between the moving mechanism 100 and the blowing hood 300, which is not limited herein.

[0041] In the floating mechanism 1 provided in this application, the clamping block 111 at the lower end of the guide rod 11 is clamped in the clamping groove 13, so that the actuating structure is suspended at the lower end of the guide rod 11. There is a gap between the clamping block 111 and the clamping groove 13. Therefore, the clamping block 111 can float in the clamping groove 13, and further the actuating structure can float relative to the guide rod 11. With the above floating mechanism 1, the actuating structure realizes positioning and guiding by its own weight when the mold is closed, and the actuating structure can float according to the coincidence deviation, thereby reducing the wear of the mold positioning pins and sleeves, improving the service life of the mold pins and sleeves, and ensuring the quality of the sand core.

[0042] Optionally, in this embodiment, an activity space for the clamping block 111 to float 1 mm unilaterally in the horizontal direction is reserved in the clamping groove 13. The gap between the clamping block 111 and the clamping groove 13 is adaptively adjusted according to actual use requirements, which is not limited herein.

[0043] Continue to refer to Figure 1 , in order to improve the stability of the up and down sliding of the actuating structure, the number of the guide rods 11 is multiple. Correspondingly, the number of the fixed seats 12 is also multiple and corresponds to the guide rods 11 one by one.

[0044] Refer to Figure 2 , the floating mechanism 1 further includes a floating bearing 14. The floating bearing 14 is connected between the guide rod 11 and the fixed seat 12. The function of the floating bearing 14 is to bear the axial load. When the floating bearing 14 bears the radial load, the upper cover and the lower cover of the floating bearing 14 can generate a small amount of relative displacement, so that the actuating structure can float relative to the guide rod 11 in the horizontal direction to accommodate the coincidence deviation. The setting of the floating bearing 14 can reduce the friction between the guide rod 11 and the fixed seat 12, and make the actuating structure float more smoothly.

[0045] Optionally, the floating bearing 14 is a one-way floating bearing or a two-way floating bearing. Under the self-weight of the actuating structure, the floating bearing 14 mainly bears the downward force. Therefore, the floating bearing 14 is preferably a one-way floating bearing.

[0046] Refer toFigure 2 and Figure 3 A through hole is provided through the fixing base 12. The through hole includes a first part 121 and a second part 122 that are connected in a stepped manner. The upper end of the guide rod 11 passes through the first part 121, and the second part 122 and the actuating structure enclose a clamping groove 13. Specifically, the upper end surface of the actuating structure forms the bottom surface of the clamping groove 13, and the second part 122 forms the side surface of the clamping groove 13.

[0047] Furthermore, the through hole further includes a third part 123 connected between the first part 121 and the second part 122. The diameters of the first part 121, the third part 123, and the second part 122 increase in sequence. The upper cover of the floating bearing 14 is fitted with the third part 123, and the lower cover of the floating bearing 14 is fitted with the guide rod 11.

[0048] Analyzing the above structure, the fixing base 12 is fixed to the upper end surface of the actuating structure by fasteners such as screws. The clamping block 111 at the lower end of the guide rod 11 is clamped in the clamping groove 13. The upper end of the guide rod 11 passes through the third part 123 and the first part 121 in sequence and is slidably connected to the moving mechanism 100. The upper cover of the floating bearing 14 is fitted with the third part 123, the lower cover of the floating bearing 14 is fitted with the guide rod 11, and the floating bearing 14 is clamped between the stepped surface between the first part 121 and the third part 123 and the clamping block 111. Through the above structure, the floating mechanism 1 is connected between the moving mechanism 100 and the actuating structure.

[0049] Continue to refer to Figure 2 , the floating mechanism 1 further includes a dust-proof ring 15. The dust-proof ring 15 is sleeved on the guide rod 11 and seals the gap between the guide rod 11 and the first part 121. The dust-proof ring 15 is used to block dust and other floating objects from entering the clamping groove 13, protect the floating bearing 14, and improve the flexibility of the actuating structure during the floating process.

[0050] Refer to Figure 4 , as an optional embodiment, an annular boss 124 is provided on the upper end surface of the fixing base 12. The annular boss 124 is disposed around the circumference of the guide rod 11. The inner ring of the dust-proof ring 15 tightly holds the guide rod 11, and the outer ring of the dust-proof ring 15 abuts against the inner ring surface of the annular boss 124. The above setting improves the sealing performance in the clamping groove 13 on the one hand. On the other hand, when the actuating structure descends and closes the mold, it can float adaptively in the horizontal direction. The dust-proof ring 15 will undergo elastic deformation under the block of the annular boss 124 during the floating process of the actuating structure. When the actuating structure rises, the dust-proof ring 15 returns to its initial shape, thereby being able to push the actuating structure to reset.

[0051] Refer to Figure 5, the floating mechanism 1 further includes a positioning pin 16 installed on the actuating structure. The positioning pin 16 is used for plugging and mating with a positioning hole 101 on the moving mechanism 100 to perform initial positioning of the moving mechanism 100 and the actuating structure, preventing the actuating structure from floating due to inertia when not closing the mold. On the basis of the above structure, the floating mechanism 1 further includes a bushing 17 installed in the positioning hole 101. The bushing 17 is used for plugging and mating with the positioning pin 16.

[0052] Furthermore, the positioning pin 16 includes a positioning boss 161 and a mounting flange 162 arranged on the periphery of the positioning boss 161, where: the positioning boss 161 is conical and its tip faces the positioning hole 101; the mounting flange 162 is fixed on the actuating structure. The above setting is beneficial to smoothly insert the positioning boss 161 into the bushing 17.

[0053] In summary, the working principle of the floating mechanism 1 provided in this embodiment is as follows: in the initial state, the positioning boss 161 is inserted into the bushing 17. Under the limitation of the positioning boss 161 and the bushing 17, the floating function does not work; when it is necessary to close the mold, the moving mechanism 100 moves the actuating structure above the mold core box 400, and then drives the actuating structure downward through the hydraulic cylinder. During this process, the positioning boss 161 disengages from the bushing 17. At this time, the actuating structure can float adaptively left and right according to the coincidence deviation, so that the mold can be closed smoothly, reducing the wear on the mold pins and bushings and ensuring the quality of the sand core.

[0054] Referring to Figure 6 , the second aspect embodiment of the present utility model provides a core-making device, which includes a moving mechanism 100, an actuating structure, and the floating mechanism 1 described in any one of the above embodiments;

[0055] The number of actuating structures is two, namely a sand shooting head 200 and a blowing hood 300 respectively;

[0056] Two floating mechanisms 1 are provided. One floating mechanism is connected between the moving mechanism 100 and the sand shooting head 200, and the other floating mechanism is connected between the moving mechanism 100 and the blowing hood 300.

[0057] The core-making device at least has all the technical effects of the above floating mechanism 1, which will not be elaborated here.

[0058] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A floating mechanism is applied to a core-making device. The core-making device includes a moving mechanism (100) and an execution structure mounted on the moving mechanism (100). The execution structure is a sand shooting head (200) or a blowing hood (300), and is characterized in that, The floating mechanism includes a guide rod (11) and a fixed seat (12). The guide rod (11) is slidably mounted on the moving mechanism (100). The fixed seat (12) is installed on the actuating structure, and a clamping groove (13) is formed therebetween. A clamping block (111) is provided at the lower end of the guide rod (11), and the clamping block (111) is clamped in the clamping groove (13), and there is a gap between the clamping block (111) and the clamping groove (13).

2. The floating mechanism according to claim 1, wherein It further includes a floating bearing (14), and the floating bearing (14) is connected between the guide rod (11) and the fixed seat (12).

3. The floating mechanism according to claim 2, wherein, The floating bearing (14) is a one-way floating bearing.

4. The floating mechanism according to claim 2, wherein A through hole is formed through the fixed seat (12). The through hole includes a first part (121) and a second part (122) that are connected in a stepped manner. The upper end of the guide rod (11) passes out of the first part (121), and the second part (122) and the actuating structure enclose the clamping groove (13).

5. The floating mechanism according to claim 4, characterized in that, The through hole further includes a third part (123) connected between the first part (121) and the second part (122). The diameters of the first part (121), the third part (123), and the second part (122) increase in sequence. The upper cover of the floating bearing (14) is matched with the third part (123), and the lower cover of the floating bearing (14) is matched with the guide rod (11).

6. The floating mechanism according to claim 4, wherein, It further includes a dust-proof ring (15). The dust-proof ring (15) is sleeved on the guide rod (11) and seals the gap between the guide rod (11) and the first part (121).

7. The floating mechanism according to claim 1, wherein It further includes a positioning pin (16) installed on the actuating structure. The positioning pin (16) is used for plugging and matching with a positioning hole (101) on the moving mechanism (100).

8. The floating mechanism according to claim 7, characterized in that, It further includes a pin sleeve (17) installed in the positioning hole (101). The pin sleeve (17) is used for plugging and matching with the positioning pin (16).

9. The floating mechanism according to claim 7, wherein The positioning pin (16) includes a positioning boss (161) and a mounting flange (162) provided on the periphery of the positioning boss (161). Wherein: the positioning boss (161) is conical and its tip faces the positioning hole (101); the mounting flange (162) is fixed on the actuating structure.

10. A core-making device, characterized in that, It includes a moving mechanism (100), an actuating structure, and the floating mechanism according to any one of claims 1 to 9; There are two actuating structures, which are respectively a sand shooting head (200) and a blowing hood (300); There are two floating mechanisms. One of the floating mechanisms is connected between the moving mechanism (100) and the sand shooting head (200), and the other floating mechanism is connected between the moving mechanism (100) and the blowing hood (300).

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