Clamping tool for sand core assembly
By designing the grippers, ratchet, and pawl coordination of the clamping fixture, automated clamping of sand core components is achieved, solving the problems of low efficiency and damage during manual transfer at high temperatures, and improving production efficiency and safety.
Patent Information
- Application Number
- CN202423230587.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-25
AI Technical Summary
In existing technologies, sand core components are easily damaged and inefficient when manually transferred at high temperatures, requiring a large amount of manpower.
Design a device comprising at least two symmetrically arranged guide rods, a clamping part, and an operating part, which utilizes the cooperation of grippers, ratchet, and pawl to achieve automated clamping and locking of sand core components, reducing manual operation.
It improves the transfer efficiency of sand core components, reduces the need for manual operation, lowers the risk of sand core damage, and increases production efficiency.
Smart Images
Figure CN223629466U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sand core subassembly clamping field, especially a kind of sand core subassembly's clamping tool. BACKGROUND
[0002] Before aero-engine cylinder cover is cast, sand core needs to be combined, placed into heating furnace to be heated, then placed into mould again.Currently sand core is placed into mould one by one by artificial, but because sand core is heated by heating furnace, its own temperature is high, artificial operation is difficult, sand core is damaged due to high temperature and artificial operation is affected.
[0003] And because of many sand cores, more artificial is needed to transfer sand core to improve efficiency, which consumes time and effort, and is not conducive to production. UTILITY MODEL CONTENT
[0004] In view of the above defects, the utility model aims at providing a kind of sand core subassembly's clamping tool, to solve the problem of current sand core subassembly transfer, consume manpower and low efficiency.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A kind of sand core subassembly's clamping tool, including at least two symmetrically arranged guide rods, clamping part and operating part are arranged in the guide rod;
[0007] The clamping part includes fixed seat and clamping jaw, the fixed seat is fixed to the guide rod, the clamping jaw is provided with two, two clamping jaws are oppositely arranged on the two sides of the fixed seat, and two clamping jaws are movably arranged in the guide rod, the clamping jaw is fixedly installed with rack;
[0008] The operating part includes shell, hand wheel, operating handle and ratchet wheel, the shell is fixed to the guide rod, the shell is rotatably installed with ratchet wheel and two pawls in the shaft respectively, two pawls are located on one side of the ratchet wheel, the hand wheel is fixed on the outside of the ratchet wheel, the rotation of the hand wheel drives the ratchet wheel to rotate, the operating handle is rotatably installed on the outside of the shell, the transmission end of the operating handle is provided with eccentric wheel, and the eccentric wheel is located between two pawls, the rotation of the eccentric wheel drives two pawls to switch between first swing state, second swing state and third swing state, when in first swing state and third swing state, one pawl is away from the ratchet wheel, and the other pawl is connected with the ratchet wheel, the ratchet wheel moves along the working direction, when in second swing state, two pawls are connected with the ratchet wheel, and the ratchet wheel is locked;The rotation of the ratchet wheel drives the movement of the rack, the movement of the rack drives two clamping jaws to make clamping movement or release movement away from each other along the guide rod.
[0009] Further, a spring is fixedly connected between the pawl and the shell.
[0010] Preferably, the clamping jaw is provided with a limiting block which is used to match with a recessed area of the sand core assembly, and the height of the limiting block is less than the height of the recessed area.
[0011] Further, the fixing seat is provided with a supporting block which is located right above the limiting block when the limiting block is located in the recessed area, and the supporting block is pressed on the surface of the sand core assembly, and the supporting block and the limiting block together fix the sand core assembly.
[0012] Further, the edge of the limiting block is provided with a circular arc surface, and the supporting block is made of a deformable material.
[0013] Preferably, a handle is further included, and the handle is arranged at the two ends of the two guide rods and is fixedly connected with the two guide rods.
[0014] Preferably, the fixing seat is provided with a through slot, and the length of the through slot is greater than the distance between the two racks.
[0015] Preferably, the rack is a cylinder with a tooth shape matched with the ratchet wheel.
[0016] Preferably, the clamping jaw is arranged on the guide rod, and the connecting part of the clamping jaw and the guide rod is provided with a bearing.
[0017] Preferably, the edge of the hand wheel is provided with a plurality of recesses, and the hand wheel is provided with a weight-reducing hole.
[0018] The technical scheme provided by the utility model can have the following beneficial effects:
[0019] The clamping part is arranged, when the sand core after being heated needs to be transferred, the clamping part is used to clamp and fix the sand core assembly, so that the relative displacement between the sand core assemblies is prevented, and the ratchet wheel and the pawl jointly act, when the clamping part clamps the sand core assembly, the operation handle is rotated to realize the locking of the clamping part, so that one person can realize the placement of multiple sand core assemblies and improve the efficiency; the handles on the two sides can effectively prevent the personnel from being scalded by high temperature and reduce the damage of the sand core in the transferring process. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a structural schematic view of one embodiment of the utility model.
[0021] Figure 2 is a structural schematic view of one embodiment of the utility model.
[0022] Figure 3is a bottom view of an embodiment of the utility model.
[0023] Figure 4 is Figure 3 A is an enlarged view.
[0024] Figure 5 is a top view of an embodiment of the utility model.
[0025] Wherein: guide rod 1, clamping part 2, fixed seat 21, support block 211, through slot 212, clamping jaw 22, limit block 221, bearing 222, operating part 3, shell 31, hand wheel 32, lightening hole 322, operating handle 33, eccentric wheel 331, ratchet 332, spring 333, ratchet wheel 34, sand core assembly 4, recess area 411, rack 5, handle 6. DETAILED DESCRIPTION
[0026] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.
[0027] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as the limitation of the utility model. In addition, the features limited by "first", "second" can explicitly or implicitly include one or more features, for distinguishing the description features, without order, without difference.
[0028] In the description of the utility model, it is understood that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, can be fixed connection, can be detachable connection, or integrally connected, can be mechanical connection, can be electrical connection, can be directly connected, can be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0029] The technical scheme of the utility model is further illustrated by the specific embodiments below. Figures 1 to 5 The technical scheme of the utility model is further illustrated by the specific embodiments below.
[0030] A clamping tool of sand core assembly comprises at least two symmetrically arranged guide rods 1, a clamping part 2 and an operating part 3 arranged through the guide rods 1.
[0031] The clamping part 2 comprises a fixed seat 21 and clamping jaws 22, the fixed seat 21 is fixed to the guide rod 1, the clamping jaws 22 are arranged oppositely on both sides of the fixed seat 21, and the clamping jaws 22 are movably arranged through the guide rod 1, and the clamping jaws 22 are fixedly installed with a rack 5.
[0032] The operating part 3 comprises a housing 31, a hand wheel 32, an operating handle 33 and a ratchet wheel 34, the housing 31 is fixed to the guide rod 1, the housing 31 is rotatably installed with the ratchet wheel 34 and two pawls 332 through shafts respectively, the two pawls 332 are located on one side of the ratchet wheel 34, the hand wheel 32 is fixed to the outside of the ratchet wheel 34, the rotation of the hand wheel 32 drives the ratchet wheel 34 to rotate, the operating handle 33 is rotatably installed on the outside of the housing 31, the transmission end of the operating handle 33 is provided with an eccentric wheel 331, and the eccentric wheel 331 is located between the two pawls 332, the rotation of the eccentric wheel 331 drives the two pawls 332 to switch between a first swing state, a second swing state and a third swing state, when in the first swing state and the third swing state, one of the pawls 332 is away from the ratchet wheel 34, and the other pawl 332 is in contact with the ratchet wheel 34, and the ratchet wheel 34 moves in the working direction, when in the second swing state, the two pawls 332 are in contact with the ratchet wheel 34, and the ratchet wheel 34 is locked; the rotation of the ratchet wheel 34 drives the movement of the rack 5, and the movement of the rack 5 drives the clamping jaws 22 to move along the guide rod 1 to approach each other or to move away from each other.
[0033] Specifically, the clamping part 2 and the operating part 3 are arranged through the guide rod 1, the two guide rods 1 are symmetrically arranged, the operating part 3 is located between the clamping parts 2, and the movement of the clamping jaws 22 of the clamping part 2 is controlled, which is equivalent to that the clamping tool is provided with at least one operating part 3, two clamping jaws 22 and two guide rods 1, the clamping part 2 is used for clamping the sand core assembly 4, the clamping part 2 comprises the fixed seat 21 and the clamping jaws 22, the fixed seat 21 is fixed to the guide rod 1, and the size of the fixed seat 21 is adapted to that of the sand core assembly 4, when clamping is needed, only the operating part 3 needs to be operated, the operating part 3 drives the movement of the rack 5, the rack 5 is fixedly connected with the clamping jaws 22, the movement of the rack 5 drives the clamping jaws 22 on both sides to approach each other, because the size of the fixed seat 21 is adapted to that of the sand core assembly 4, the clamping jaws 22 can clamp the sand core assembly 4 before reaching the fixed seat 21.
[0034] And, the housing 31 is rotatably mounted with a ratchet wheel 34 and two pawls 332 inside through the shaft, two said pawls 332 are located on one side of the ratchet wheel 34, the transmission end of the operating handle 33 is provided with an eccentric wheel 331, the eccentric wheel 331 is located between the two pawls 332, rotating the operating handle 33 can change the state of the eccentric wheel 331, in turn, the pawl 332 has a first swing state, a second swing state and a third swing state, when in the first swing state and the third swing state, one of the pawls 332 is away from the ratchet wheel 34, the other pawl 332 is in contact with the ratchet wheel 34, the ratchet wheel 34 moves in the working direction, when in the second swing state, the two pawls 332 are in contact with the ratchet wheel 34, locking the ratchet wheel 34. The surface of the housing 31 is provided with "tight" and "loose" two words, corresponding to different rotating positions of the operating handle 33. That is, when it is needed to close the clamp jaw 22 to the middle and clamp the sand core assembly 4, rotate the operating handle 33 to make the pawl 332 in the first swing state, the operating handle 33 points to the "tight" word, only one of the pawls 332 is in contact with the ratchet wheel 34, the ratchet wheel 34 can only rotate clockwise (as viewed from above), then rotate the hand wheel 32 to drive the ratchet wheel 34 to rotate, achieving the purpose of clamping the sand core assembly 4, after clamping, rotate the operating handle 33 to the middle position, that is, the second swing state, the two pawls 332 are in contact with the ratchet wheel 34, locking the ratchet wheel 34, in turn, fixing and clamping the sand core assembly 4; after placing the sand core assembly 4 at the required position, rotate the operating handle 33 to the third swing state, that is, the operating handle 33 points to the "loose" word, compared with the first swing state, the state of the two pawls 332 changes, the pawl 332 in contact with the ratchet wheel 34 in the first swing state is away from the ratchet wheel 34 in the second swing state, and the other pawl 332 is opposite, in this swing state, the ratchet wheel 34 can only rotate counterclockwise (as viewed from above), rotate the hand wheel 32 counterclockwise to move the clamp jaw 22 to the two sides, releasing the sand core assembly 4, in this way, by rotating the operating handle 33 to adjust the swing state, then rotating the hand wheel 32 to drive the clamp jaw 22 to move, achieving the clamping and shifting of multiple sand core assemblies 4, without individually shifting each, improving the efficiency, and one person can rotate the operating handle 33 and the hand wheel 32, reducing the use of manpower, solving the problem of wasting manpower and low efficiency in the current sand core assembly 4 shifting.
[0035] Further, the spring 333 is fixedly connected between the pawl 332 and the housing 31.
[0036] As Figure 4As shown, the pawl 332 is fixedly connected with the housing 31 through a spring 333, when the operating handle 33 is rotated, the eccentric wheel 331 is deflected, driving the position of the pawl 332 to change, when the spring 333 is provided, the spring 333 has a certain elastic force, which can ensure that the pawl 332 keeps in contact with the ratchet wheel 34, and effectively prevents the ratchet wheel 34 from rotating reversely, ensuring that the ratchet wheel 34 moves in the working direction, and improving the reliability.
[0037] Preferably, the clamping jaw 22 is provided with a limiting block 221, which is used to match with the recessed area 411 of the sand core assembly, and the height of the limiting block 221 is less than the height of the recessed area 411.
[0038] Specifically, the limiting block 221 can be clamped into the recessed area 411, when the clamping jaw 22 clamps the sand core assembly 4, because the height of the limiting block 221 is less than the height of the recessed area 411, that is, the limiting block 221 is clamped into the inside of the recessed area 411, thus, the clamping jaw 22 can provide a horizontal force to the sand core assembly 4, and the limiting block 221 can provide a vertical force to the sand core assembly 4, and the limiting block 221 can limit the sand core assembly 4 from moving downward under the action of gravity.
[0039] Further, the fixing seat 21 is provided with a supporting block 211, when the limiting block 221 is located in the recessed area 411, the supporting block 211 is located directly above the limiting block 221, the supporting block 211 is pressed onto the surface of the sand core assembly, and the supporting block 211 and the limiting block 221 together fix the sand core assembly.
[0040] Specifically, the supporting block 211 is pressed onto the surface of the sand core assembly 4, and the supporting block 211 and the limiting block 221 together fix the sand core assembly 4, the supporting block 211 provides a downward pressure to the sand core assembly 4, and the limiting block 221 and the supporting block 211 together fix the sand core assembly 4, the sand core assembly 4 cannot relatively displace in the vertical direction with the clamping tool, and the clamping jaw 22 limits the relative displacement of the sand core assembly 4 in the horizontal direction, so that the sand core assembly 4 is firmly fixed and cannot freely move in each direction, ensuring that the sand core assembly 4 is fixed and cannot loosen and spread apart during the transfer, and reducing the damage caused by the collision between the sand core assemblies 4.
[0041] Further, the edges of the limiting block 221 are provided with arc surfaces, and the supporting block 211 is made of a deformable material.
[0042] Specifically, when rotating the ratchet wheel 34, the rack 5 is smoothly driven, and the clamping jaw 22 is moved to the middle. The edge of the limiting block 221 is provided with a circular arc surface, and the supporting block 211 is made of a deformable material. Because of the provision of the circular arc surface, the limiting block 221 can be quickly clamped into the recessed area 411, and the deformable material increases the contact area of the supporting block 211 with the sand core assembly 4, thereby ensuring that the sand core assembly 4 is firmly fixed.
[0043] Preferably, a handle 6 is further included, which is arranged at both ends of the two guide rods 1 and is fixedly connected with the two guide rods 1.
[0044] Specifically, the handle 6 is located at both ends of the guide rod 1. When transferring, the sand core assembly 4 can be transferred by directly holding the handles 6 at both ends, without directly contacting the high-temperature sand core assembly 4. Moreover, the fixed sand core assembly 4 is located at the middle of the guide rod 1, and the handles 6 at both ends are not easily affected by the high temperature of the sand core assembly 4, thereby being easy to operate.
[0045] Preferably, the fixing seat 21 is provided with a through groove 212, and the length of the through groove 212 is greater than the distance between the two racks 5.
[0046] Specifically, the rack 5 is fixed with the clamping jaw 22, the rack 5 can be connected with the ratchet wheel 34 through the through groove 212, and the length of the through groove 212 is greater than the distance between the two racks 5. When the clamping jaw 22 is moved to the middle, the movement of the rack 5 will not be hindered, so that the operation is more convenient. Moreover, the through groove 212 is large, which can further reduce the weight of the entire clamping tool and is more conducive to clamping and transferring.
[0047] Preferably, the rack 5 is a cylinder with a tooth shape matched with the ratchet wheel 34.
[0048] It is worth noting that the rack 5 is a cylinder. Due to the special arc-shaped tooth design, it can be distributed to a longer tooth surface when bearing a load, thereby effectively improving its load capacity and effectively clamping the sand core assembly 4. Moreover, the installation process of the cylindrical rack 5 is relatively simple, without the need for complex debugging and calibration. The structure is compact, the maintenance cost is low, and the cost performance is higher.
[0049] Preferably, the clamping jaw 22 is arranged in the guide rod 1, and the connecting portion of the clamping jaw 22 and the guide rod 1 is provided with a bearing 222.
[0050] Specifically, the bearing 222 can significantly reduce the friction between the clamping jaw 22 and the guide rod 1, reduce energy consumption, improve operation efficiency, ensure the clamping jaw 22 to move along a linear trajectory, reduce deviation and error in movement, provide precise linear motion, stable operation, ensure that the clamping jaw 22 can clamp the sand core assembly 4 and cannot deviate in position.
[0051] Preferably, the edge of the hand wheel 32 is provided with a plurality of recesses, and the hand wheel 32 is provided with a weight-reducing hole 322.
[0052] Specifically, the recesses can provide better gripping points, so that the operator has a better hand feeling when rotating the hand wheel 32, improves the comfort of operation, can reduce accidental sliding of the hand wheel 32 during operation, reduces the operation risk, and improves the safety.
[0053] And the recesses and the weight-reducing hole 322 can effectively reduce the weight of the hand wheel 32, reduce the labor intensity of the operator, and reduce the physical consumption under frequent operation.
[0054] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations herein, those skilled in the art can conceive other specific embodiments of the present application without creative labor, and these embodiments will fall within the scope of protection of the present application.
Claims
1. A sand core assembly gripping fixture, characterized by: The device comprises at least two symmetrically arranged guide rods, a clamping part and an operating part arranged on the guide rods; The clamping part comprises a fixed seat and two clamping jaws, the fixed seat is fixed on the guide rod, the two clamping jaws are arranged on the two sides of the fixed seat, and the two clamping jaws are movably arranged on the guide rod, and the clamping jaw is fixedly installed with a rack; The operating part comprises a shell, a hand wheel, an operating handle and a ratchet wheel, the shell is fixed on the guide rod, the ratchet wheel and two pawls are rotatably installed in the shell through shafts, the two pawls are located on one side of the ratchet wheel, the hand wheel is fixed on the outside of the ratchet wheel, the rotation of the hand wheel drives the rotation of the ratchet wheel, the operating handle is rotatably installed on the outside of the shell, the transmission end of the operating handle is provided with an eccentric wheel, and the eccentric wheel is located between the two pawls, the rotation of the eccentric wheel drives the two pawls to switch between the first swing state, the second swing state and the third swing state, when in the first swing state and the third swing state, one of the pawls is away from the ratchet wheel, and the other pawl is in contact with the ratchet wheel, and the ratchet wheel moves in the working direction, when in the second swing state, the two pawls are in contact with the ratchet wheel to lock the ratchet wheel; the rotation of the ratchet wheel drives the movement of the rack, and the movement of the rack drives the two clamping jaws to move towards each other along the guide rod for clamping or move away from each other for releasing.
2. A core assembly gripping tool as defined in claim 1 wherein: The spring is fixedly connected between the pawl and the shell.
3. A core assembly gripping tool as defined in claim 1 wherein: The clamping jaw is provided with a limiting block, the limiting block is matched with a recessed area of the sand core assembly, and the height of the limiting block is less than the height of the recessed area.
4. A core assembly gripping tool as defined in claim 3 wherein: The fixed seat is provided with a supporting block, when the limiting block is located in the recessed area, the supporting block is located directly above the limiting block, the supporting block is pressed on the surface of the sand core assembly, and the supporting block and the limiting block jointly fix the sand core assembly.
5. A sand core assembly gripping tool as defined in claim 4 wherein: The edge of the limiting block is provided with a circular arc surface, and the supporting block is made of a deformable material.
6. A sand core assembly gripping tool as defined in claim 1 wherein: A handle is further arranged on the two ends of the two guide rods, and the handle is fixedly connected with the two guide rods.
7. A core assembly gripping tool as defined in claim 1 wherein: The fixed seat is provided with a through groove, and the length of the through groove is greater than the distance between the two racks.
8. A sand core assembly gripping tool as defined in claim 1 wherein: The rack is a cylinder with a tooth shape matched with the ratchet wheel.
9. A sand core assembly gripping tool as defined in claim 1 wherein: The clamping jaw is arranged on the guide rod, and a bearing is arranged at the connection between the clamping jaw and the guide rod.
10. A sand core assembly gripping tool as defined in claim 1 wherein: The edge of the hand wheel is provided with a plurality of recesses, and the hand wheel is provided with a weight-reducing hole.