Multi-type automatic core setting clamp for gear sand cores
By designing a multi-type automatic lower core clamp for casting gears, the combined structure of the hook and limit rod is used to solve the problem of unstable position of the sand core during the lower core operation, ensuring casting accuracy.
Patent Information
- Application Number
- CN202421937803.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-08-12
AI Technical Summary
During the casting gear process, the sand core is easily deformed and damaged when placed in the sand box due to skew and shaking, which in turn deteriorates the casting accuracy.
A multi-type automatic lower core clamp for gear sand core is designed, and a hook piece is used to hook the bottom of the sand core. The action mechanism drives the hook piece to move in a linear manner. The limit rod limits the sway and dislocation of the sand core through the first limit rod and the second limit rod to ensure that the sand core is stable when placed in the sand box.
It effectively prevents crushing and rupture caused by skew and shaking during the lower core movement, and ensures that the inner wall profile of the casting gear meets the design requirements.
Smart Images
Figure CN222593192U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of casting equipment, in particular to a multi-type automatic core clamp for gear sand cores. Background Art
[0002] Gears are important components in intelligent robots such as industrial manipulators, and some of the semi-finished products of gears are cast. The outer contour of the gear matches the shape in the sand box, and the inner contour of the gear requires a sand core.
[0003] There are many examples of assembling shell cores in sand molds. Its main function is to form the cavity in the casting by fixing the sand core in a specific position in the sand mold and then pouring. After the casting is completed, the sand core is wrapped in the casting and the cavity part in the casting is formed by breaking the sand core.
[0004] In actual operation, the sand core needs to be hoisted into the sand box. Each time each sand core is hoisted, the stability of the sand core must be ensured. If the sand core is deformed and damaged, it will eventually deteriorate the casting accuracy of the inner wall of the gear. Utility Model Content
[0005] The problem to be solved by the utility model is to provide a multi-type automatic core-setting clamp for gear sand cores. During the core-setting action of placing the sand core into a sand box, the position of the sand core is guaranteed to be relatively stable, and it is not easy to be crushed or broken due to skewness or shaking, thereby ensuring that the inner wall contour of the cast gear meets the design requirements.
[0006] In order to solve the above problems, the utility model provides a multi-type automatic core clamp for gear sand cores. In order to achieve the above purpose, the technical solution adopted by the utility model to solve its technical problems is:
[0007] A multi-type automatic core clamp for a gear sand core, comprising: a hook member, which passes through a cavity in the middle of the sand core, and the hook member is provided with a bottom hook that contacts the bottom surface of the sand core; an action mechanism, which drives the hook member to move linearly; a limit rod, comprising a first limit rod and a second limit rod; the bottom of the first limit rod can form a limit contact with the top axial end of the sand core, and the bottom of the second limit rod is provided with an arc line vertically fixed, and one side of the concave surface of the arc line can form a limit contact with the outer wall side of the sand core; the tops of the limit rods are fixed with a top plate; the height of the arc line is higher than the height of the bottom hook; the first limit rod and the second limit rod are both multiple.
[0008] The beneficial effect of adopting the above technical solution is: this technical solution uses a hook part to hook the bottom of the sand core, which is convenient for placing the sand core into the sand box, and the action mechanism drives the hook part to clamp or release the sand core. The limit rod does not participate in supporting the sand core, but it limits the swing and looseness of the sand core. The bottom hook limits the freedom of the sand core to fall vertically downward. The first limit rod limits the upward shaking and jumping of the sand box. The shaking of the sand core can easily cause the sand core to break. The arc line of the second limit rod can avoid the horizontal misalignment of the sand core, and because the arc line is in a high position and the bottom hook is in a low position, the arc line can also prevent the sand core from being skewed. The concave surface of the arc line can adapt to the convex surface of the outer wall of the sand core, reducing the possibility of crushing the outer wall of the sand core. Finally, in the action of placing the sand core into the sand box, this fixture ensures that the position of the sand core is relatively stable, not easy to be crushed or broken, and then ensures that the inner wall contour of the final cast gear meets the design requirements.
[0009] As a further improvement of the present invention, the number of the first limiting rods is four.
[0010] The beneficial effect of adopting the above technical solution is that too few first limiting rods may easily lead to excessive contact pressure between a single first limiting rod and the sand core.
[0011] As a further improvement of the present invention, the number of the second limiting rods is two, and the concave surfaces of the two arc lines are arranged to face each other.
[0012] The beneficial effect of adopting the above technical solution is that at least two arc lines are required to cover the sand core.
[0013] As a further improvement of the present invention, four first limiting rods are arranged in a mirror-symmetrical manner on both sides of a line connecting the two second limiting rods.
[0014] The beneficial effect of adopting the above technical solution is that the contact force between the integral limiting rod and the sand core is relatively symmetrical.
[0015] As a further improvement of the utility model, the top surface of the arc line and the bottom surface of the first limiting rod are at the same horizontal height, and the curvature radius of the concave surface of the arc line is equal to the curvature radius of the side surface of the outer wall of the sand core.
[0016] The beneficial effect of adopting the above technical solution is that the concave surface of the arc line and the top of the convex surface of the outer wall of the sand core achieve full surface contact, and the overall pressure is relatively small.
[0017] As a further improvement of the present invention, the central angle range of the concave surface of the arc line is 30° to 40°.
[0018] The beneficial effect of adopting the above technical solution is that the extension length of the arc line is determined.
[0019] As a further improvement of the present invention, the two hook members are arranged in mirror symmetry, and the bottom hooks of the two hook members extend in opposite directions.
[0020] The beneficial effect of adopting the above technical solution is that the two hook members are brought close to each other to realize the release of the sand core, and the two hook members are moved away from each other to realize the clamping of the sand core.
[0021] As a further improvement of the present utility model, a connection line between the two hook members and a connection line between the two second limiting rods are parallel to each other.
[0022] The beneficial effect of adopting the above technical solution is: because when the hook parts move towards or away from each other, if the friction forces between the two hook parts and the sand core are greatly different, one hook part and the sand box will move relative to each other, and the other hook part and the sand core will not move relative to each other temporarily, which means that the sand core has left its preset position, so the arc line of the second limit rod is needed to block this direction.
[0023] As a further improvement of the present invention, the upper half of the limit rod is provided with an external thread, and the limit rod is detachably assembled with the top plate via the external thread.
[0024] The beneficial effect of adopting the above technical solution is that the number of limit rods in the vertical direction can be appropriately increased or decreased according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 It is a three-dimensional diagram of an embodiment of the utility model;
[0027] Figure 2 It is a partial enlarged view of point A of one embodiment of the utility model;
[0028] Figure 3 It is a three-dimensional diagram of an embodiment of the utility model;
[0029] Figure 4 It is a partial enlarged view of position B of an implementation mode of the utility model;
[0030] Figure 5 It is an exploded view of an implementation method of the utility model;
[0031] Figure 6It is a schematic diagram of an action mechanism of one embodiment of the utility model;
[0032] Figure 7 It is a three-dimensional diagram of a hook member according to one embodiment of the utility model;
[0033] Figure 8 It is an application schematic diagram of a hook member according to one embodiment of the utility model.
[0034] 1-lifting plate; 101-positioning pit; 2-tray; 3-lower sand core; 4-upper sand core; 5-top plate; 51-hollow hole; 6-hook piece; 61-bottom hook; 62-vertical rod; 63-guide sleeve; 64-U-shaped notch; 65-U-shaped convex rib; 7-limiting rod; 71-first limiting rod; 72-second limiting rod; 73-arc bar; 8-linear cylinder; 9-clamp seat; 10-guide sleeve; 11-guide rod; 12-output rod. DETAILED DESCRIPTION
[0035] The following is a further detailed description of the present invention in conjunction with specific embodiments:
[0036] In order to achieve the purpose of the utility model, a multi-type automatic core clamp for a gear sand core includes: a hook member 6, which passes through the cavity in the middle of the sand core, and the hook member 6 has a bottom hook 61 that contacts the bottom surface of the sand core; an action mechanism, which drives the hook member 6 to move linearly; a limit rod 7, including a first limit rod 71 and a second limit rod 72; the bottom of the first limit rod 71 can form a limit contact with the top shaft end of the sand core, and the bottom of the second limit rod 72 has an arc line 73 fixed vertically, and one side of the concave surface of the arc line 73 can form a limit contact with the outer wall side of the sand core; the top of the limit rod is fixed with a top plate; the height of the arc line 73 is higher than the height of the bottom hook 61; the first limit rod 71 and the second limit rod 72 are both multiple. The sand core includes a lower sand core 3 and an upper sand core 4.
[0037] The beneficial effect of adopting the above technical solution is: this technical solution uses a hook part to hook the bottom of the sand core, which is convenient for placing the sand core into the sand box, and the action mechanism drives the hook part to clamp or release the sand core. The limit rod does not participate in supporting the sand core, but it limits the swing and looseness of the sand core. The bottom hook limits the freedom of the sand core to fall vertically downward. The first limit rod limits the upward shaking and jumping of the sand box. The shaking of the sand core can easily cause the sand core to break. The arc line of the second limit rod can avoid the horizontal misalignment of the sand core, and because the arc line is in a high position and the bottom hook is in a low position, the arc line can also prevent the sand core from being skewed. The concave surface of the arc line can adapt to the convex surface of the outer wall of the sand core, reducing the possibility of crushing the outer wall of the sand core. Finally, in the action of placing the sand core into the sand box, this fixture ensures that the position of the sand core is relatively stable, not easy to be crushed or broken, and then ensures that the inner wall contour of the final cast gear meets the design requirements.
[0038] In some other embodiments of the present invention, the number of the first limiting rods 71 is four.
[0039] The beneficial effect of adopting the above technical solution is that too few first limiting rods may easily lead to excessive contact pressure between a single first limiting rod and the sand core.
[0040] In some other embodiments of the present invention, the number of the second limiting rods 72 is two, and the concave surfaces of the two arc lines 73 are arranged to face each other.
[0041] The beneficial effect of adopting the above technical solution is that at least two arc lines are required to cover the sand core.
[0042] In some other embodiments of the present invention, four first limiting rods 71 are arranged in mirror symmetry on both sides of a line connecting two second limiting rods 72 .
[0043] The beneficial effect of adopting the above technical solution is that the contact force between the integral limiting rod and the sand core is relatively symmetrical.
[0044] In other embodiments of the present invention, the top surface of the arc line 73 and the bottom surface of the first limiting rod 71 are at the same horizontal height, and the curvature radius of the concave surface of the arc line 73 is equal to the curvature radius of the side surface of the outer wall of the sand core.
[0045] The beneficial effect of adopting the above technical solution is that the concave surface of the arc line and the top of the convex surface of the outer wall of the sand core achieve full surface contact, and the overall pressure is relatively small.
[0046] In other embodiments of the present invention, the two hook members 6 are arranged in mirror symmetry, and the bottom hooks of the two hook members 6 extend in opposite directions; the two hook members 6 have the freedom of linear reciprocating motion to move closer to or away from each other.
[0047] The beneficial effect of adopting the above technical solution is that the extension length of the arc line is determined.
[0048] In some other embodiments of the present invention, a line connecting the two hook members 6 and a line connecting the two second limiting rods 72 are parallel to each other.
[0049] The beneficial effect of adopting the above technical solution is that the two hook members are brought close to each other to realize the release of the sand core, and the two hook members are moved away from each other to realize the clamping of the sand core.
[0050] In some other embodiments of the present invention, a line connecting the two hook members 6 and a line connecting the two second limiting rods 72 are parallel to each other.
[0051] The beneficial effect of adopting the above technical solution is: because when the hook parts move towards or away from each other, if the friction forces between the two hook parts and the sand core are greatly different, one hook part and the sand box will move relative to each other, and the other hook part and the sand core will not move relative to each other temporarily, which means that the sand core has left its preset position, so the arc line of the second limit rod is needed to block this direction.
[0052] In some other embodiments of the present invention, the upper half of the limiting rod has an external thread, and the limiting rod is detachably assembled with the top plate via the external thread.
[0053] The beneficial effect of adopting the above technical solution is that the number of limit rods in the vertical direction can be appropriately increased or decreased according to actual needs.
[0054] The hook member 6 passes through the cavity in the middle of the sand core. The hook member 6 has a bottom hook 61 that contacts the bottom surface of the sand core, and guide sleeves 63 are integrally connected to the two sides of the top of the hook member 6; when the two hanging components 6 are arranged in mirror symmetry, the extension directions of the bottom hooks 63 of the two hanging components 6 are opposite to each other; the action mechanism drives the hanging component 6 to move in a straight line, and the action mechanism includes a linear power member and a guide rod 11. The guide sleeve 63 is for the guide rod 11 to move through, and the axial direction of the guide sleeve 10 is parallel to the extension direction of the bottom hook 61; the power member drives the hook member 6 to reciprocate along the guide rod 11; the limit rod realizes limit contact with the top of the axial end and the outer wall side of the sand core, and the top of the limit rod is jointly fixed with a top plate 5; the top plate 5 has a hollow hole 51 for the hook member 6 to pass through, and the action mechanism is fixed to the top surface of the top plate 5; the top plate 5 also has a penetrating annular member 10, and the top plate 5 has the vertical lifting freedom along the axial direction of the annular member 10.
[0055] The action mechanism also includes a clamp seat 9, and the two ends of the guide rod 11 are penetrated with the clamp seat 9, and the clamp seat 9 allows the guide rod 11 to be suspended above the top plate 5; each guide rod 11 is movably equipped with a guide sleeve 63 on the same side of the two hook members 6, and the guide sleeve 63 is located between the two clamp seats 9.
[0056] Each hook member 6 is connected to a linear cylinder 8, and the output rods 12 of the two linear cylinders 8 corresponding to the same sand core are arranged to face each other.
[0057] A parallel lifting plate 1 is also provided below the top plate 5 , and a positioning pit 101 is recessed on the top surface of the lifting plate 1 , and a tray 2 is movably mounted in the positioning pit 101 , and the top surface of the tray 2 is movably mounted to the bottom surface of the sand core.
[0058] The hanging member 6 comprises, from bottom to top, a bottom hook 61 and a vertical rod 62 which are integrally connected in sequence, and the bottom hook 61 and the vertical rod 62 form an angle with each other.
[0059] The top of the vertical rod 62 is also provided with a concave U-shaped notch 64 , and the U-shaped notch 64 is half-surrounded by a U-shaped convex rib 65 .
[0060] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A multi-type automatic core setting fixture for gear sand cores, characterized in that: include: A hook member passes through the cavity in the middle of the sand core, wherein the hook member has a bottom hook in contact with the bottom surface of the sand core; The action mechanism drives the hanging component to move linearly; The limiting rod comprises a first limiting rod and a second limiting rod; the bottom of the first limiting rod can form a limiting contact with the top axial end of the sand core, and the bottom of the second limiting rod has an arc line fixed vertically, and one side of the concave surface of the arc line can form a limiting contact with the side surface of the outer wall of the sand core; The tops of the limit rods are fixed with a top plate; The height of the arc line is higher than the height of the bottom hook; There are multiple first limiting rods and multiple second limiting rods.
2. The multi-type automatic core setting fixture for gear sand cores according to claim 1, characterized in that: The number of the first limiting rods is four.
3. The multi-type automatic core setting fixture for gear sand cores according to claim 2, characterized in that: The number of the second limiting rods is two, and the concave surfaces of the two arc lines are arranged to face each other.
4. The multi-type automatic core setting fixture for gear sand cores according to claim 3, characterized in that: The four first limiting rods are arranged mirror-symmetrically on both sides of a line connecting the two second limiting rods.
5. The multi-type automatic core setting fixture for gear sand cores according to claim 3, characterized in that: The top surface of the arc line and the bottom surface of the first limiting rod are at the same horizontal height, and the curvature radius of the concave surface of the arc line is equal to the curvature radius of the side surface of the outer wall of the sand core.
6. The multi-type automatic core setting fixture for gear sand cores according to claim 1, characterized in that: The central angle corresponding to the concave surface of the arc line ranges from 30° to 40°.
7. The multi-type automatic core setting fixture for gear sand cores according to claim 3, characterized in that: The two hook members are arranged in mirror symmetry, and the bottom hooks of the two hook members extend in opposite directions.
8. The multi-type automatic core setting fixture for gear sand cores according to claim 7, characterized in that: The connecting line between the two hook members and the connecting line between the two second limiting rods are parallel to each other.
9. The multi-type automatic core setting fixture for gear sand cores according to claim 1, characterized in that: The upper half of the limiting rod is provided with an external thread, and the limiting rod is detachably assembled with the top plate through the external thread.