Driven turnover mechanism for casting

Abstract

The utility model relates to a driven turnover mechanism for casting, which belongs to the technical field of clamping equipment, is used for being matched with a driving mechanism to clamp and turn over a sand mold, and comprises a support shaft sleeve and a rotating shaft rotationally arranged in the support shaft sleeve, a turntable is arranged at one end of the rotating shaft far away from the driving mechanism, and notches are arranged at two ends of a diameter line of the turntable; a positioning sleeve is arranged above the rotary disc, and the inner top of the positioning sleeve is connected with a bearing guide rod through a first compression spring, wherein the bearing guide rod downwards extends out of the positioning sleeve and can be matched with the notch. The rotating shaft rotates in the supporting shaft sleeve and can be matched with a driving mechanism, the structure that only one side provides overturning power and the other side is in driven fit is completed, and the synchronous overturning action of a sand mould without a sand box bearing is guaranteed; the bearing guide rod can be matched with the rotary disc synchronously rotating along with the rotary shaft under the extrusion effect of the first compression spring, when the sand mold is overturned by 0 degree and 180 degrees, the bearing guide rod is clamped into the notch for limiting, and the sand mold overturning angle in-place control and limiting can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping equipment, in particular to a driven turning mechanism for casting. Background Art

[0002] Sand casting is a traditional casting method suitable for producing castings of various shapes, sizes, and batch sizes using a variety of common alloys. Sand casting refers to the production of castings in sand molds. Molding and core sand are typically made from a mixture of silica sand, clay or a binder, and water in a specific ratio. These sands must possess "one strength and three properties": strength, air permeability, fire resistance, and yield strength. Sand casting is the most widely used casting method in production.

[0003] In the casting production line, the sand mold needs to be flipped to a certain angle at the folding and flow coating stations in order to carry out folding and flow coating. There are two sand box handles at each end of the length direction of the sand box, and there is a circular groove in the middle of the sand box handle. When folding or flow coating, the two support rods on the clamping jaws extend into the groove of the sand box handle, and the two rotating cylinders on the clamping arms on both sides drive the clamping jaws on both sides to rotate, and the support rods on the clamping jaws drive the sand box to rotate synchronously at a certain angle.

[0004] There is a boxless molding process in casting production. In this process, there is no sand box to carry the sand mold, so the clamping claws cannot be used. Instead, a steel plate with nails is used to clamp and flip the sand mold by relying on friction and steel nails inserted into the sand mold. Since the rotating cylinders on the clamping arms on both sides are independently controlled by two oil pipes, complete synchronization cannot be guaranteed. Due to the torsional torque, there is a risk of damaging the sand mold. Utility Model Content

[0005] In order to solve the problem that the sand mold may be damaged due to the asynchronous rotation of the two ends of the sand mold, the utility model provides a driven turning mechanism for casting.

[0006] The utility model is realized through the following technical solutions:

[0007] A driven flipping mechanism for casting, used to cooperate with an active mechanism to clamp and flip the sand mold, includes a supporting sleeve and a rotating shaft rotatably arranged in the supporting sleeve, a turntable is provided at the end of the rotating shaft away from the active mechanism, and notches are provided at both ends of the diameter line of the turntable; a positioning sleeve is provided above the turntable, and the inner top of the positioning sleeve is connected to a bearing guide rod extending downward from the positioning sleeve and capable of cooperating with the notch through a compression spring.

[0008] The rotating shaft rotates in the supporting sleeve, and can cooperate with the active mechanism to complete the structure of only one side providing the flipping power and the other side being driven to cooperate, which ensures the synchronous flipping action of the sand mold without a sand box; the bearing guide rod can cooperate with the turntable that rotates synchronously with the rotating shaft under the squeezing action of the compression spring 1. When flipping 0° and 180°, the bearing guide rod is stuck in the notch to limit the position, which helps to achieve the control and limit of the flipping angle of the sand mold.

[0009] A further improvement of the present invention is that a fixed shaft is installed at the lower end of the bearing guide rod, and a deep groove ball bearing that can cooperate with the notch is provided on the fixed shaft.

[0010] A further improvement of the present invention is that a shaft retaining ring 1 is provided on the fixed shafts on both sides of the bearing guide rod, which can limit the axial displacement of the fixed shaft.

[0011] A further improvement of the present invention is that the top of the positioning sleeve is threadedly connected to a top screw that abuts against one of the compression springs.

[0012] A further improvement of the present invention is that a spring pressure plate is provided between the top screw and the compression spring.

[0013] A further improvement of the present invention is that a positioning screw capable of abutting against the bearing guide rod is threadedly connected to the side wall of the positioning sleeve; and an extreme displacement limiting groove cooperating with the positioning screw is provided on the side of the bearing guide rod close to the positioning screw.

[0014] A further improvement of the present invention is that the end of the support sleeve away from the active mechanism is provided with an end cover; a second compression spring is provided on the rotating shaft between the turntable and the end cover; and a locking nut is threadedly connected to the side of the turntable away from the second compression spring.

[0015] A further improvement of the present invention is that an adjustment sleeve is provided inside the end of the support sleeve away from the active mechanism.

[0016] A further improvement of the present invention is that a second shaft retaining ring capable of limiting the axial movement of the rotating shaft is provided on the side of the adjusting sleeve facing away from the active mechanism.

[0017] It can be seen from the above technical solution that the beneficial effect of the utility model is: in order to eliminate the risk of damage to the sand mold, one end should be equipped with a rotating oil cylinder during flipping, which is an active mechanism, and the other end should not be equipped with a rotating oil cylinder, which rotates synchronously with the active mechanism, which is a driven mechanism, thereby eliminating the problem of cylinder asynchrony and avoiding damage to the sand mold.

[0018] The rotating shaft rotates in the supporting sleeve, and can cooperate with the active mechanism to complete the structure of only one side providing the flipping power and the other side being driven to cooperate, which ensures the synchronous flipping action of the sand mold without a sand box; the bearing guide rod can cooperate with the turntable that rotates synchronously with the rotating shaft under the squeezing action of the compression spring 1. When flipping 0° and 180°, the bearing guide rod is stuck in the notch to limit the position, which helps to achieve the control and limit of the flipping angle of the sand mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of the driven mechanism and the clamping arm according to a specific embodiment of the present utility model.

[0021] Figure 2 This is a schematic diagram of the assembly of the driven mechanism and the active mechanism on the main frame according to a specific embodiment of the present utility model.

[0022] In the accompanying drawings: 10. Driven mechanism; 11. Support sleeve; 12. Rotating shaft; 13. Thrust ball bearing; 14. Needle roller bearing; 15. Adjusting sleeve; 16. Locking nut 2; 17. Turntable; 18. Locking nut 1; 19. Compression spring 2; 20. Positioning sleeve; 21. Top screw; 22. Compression spring 1; 23. Bearing guide rod; 24. Spring pressure plate; 25. Fixed shaft; 26. Deep groove ball bearing; 27. Positioning screw; 28. Mounting seat; 30. End cover; 40. Clamping arm 2; 50. Main frame; 60. Clamping arm 1; 70. Active mechanism; 80. Sand mold. DETAILED DESCRIPTION

[0023] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0024] As attached Figure 1-2The figure shows a driven turning mechanism for casting, used to cooperate with an active mechanism to clamp and turn a sand mold. It includes a support sleeve 11 and a rotating shaft 12 rotatably disposed within the support sleeve 11. The rotating shaft 12 is supported by needle roller bearings 14 and ball bearings at both ends of the support sleeve 11, allowing it to rotate within the support sleeve 11. An adjustment sleeve 15 is installed within the end of the support sleeve 11 facing away from the active mechanism. A second shaft retaining ring is installed on the side of the adjustment sleeve 15 facing away from the active mechanism to limit the axial movement of the rotating shaft 12.

[0025] A turntable 17 is provided at the end of the rotating shaft 12 away from the active mechanism, and notches are provided at both ends of the diameter line of the turntable 17; an end cover 30 is provided at the end of the support sleeve 11 away from the active mechanism; a compression spring 2 19 is provided on the rotating shaft 12 between the turntable 17 and the end cover 30; a locking nut 18 is threadedly connected to the side of the turntable 17 away from the compression spring 2 19.

[0026] A positioning sleeve 20 is provided above the turntable 17 , and the inner top of the positioning sleeve 20 is connected to a bearing guide rod 23 extending downward from the positioning sleeve 20 and capable of matching with the notch via a compression spring 22 .

[0027] The lower end of the bearing guide rod 23 is provided with a fixed shaft 25, and a deep groove ball bearing 26 that can cooperate with the notch is provided on the fixed shaft 25. The fixed shafts 25 on both sides of the bearing guide rod 23 are provided with a shaft retaining ring 1 that can limit the axial displacement of the fixed shaft 25.

[0028] The top of the positioning sleeve 20 is threadedly connected to a top screw 21 that abuts against a compression spring 1 22 ; a spring pressure plate 24 is provided between the top screw 21 and the compression spring 1 22 .

[0029] A positioning screw 27 capable of abutting against the bearing guide rod 23 is threadedly connected to the side wall of the positioning sleeve 20; a limit displacement limiting groove cooperating with the positioning screw 27 is provided on the side surface of the bearing guide rod 23 close to the positioning screw 27.

[0030] The active mechanism and the driven mechanism 10 are clamped by clamping arms 1 and 2, 40, respectively, which slide on the main frame 50. Clamping arms 1 and 2, 40, move toward each other to clamp the sand mold. Driven by the active mechanism, the driven mechanism 10 cooperates to synchronously flip the sand mold. The end cap 30 and positioning sleeve 20 are both mounted on clamping arm 2, 40. The end of the support sleeve 11 away from the active mechanism is provided with a locking nut 2, 16, which mates with the end surface of clamping arm 2, 40. The locking nut 2, 16, and the adjustment sleeve 15 form an internal and external corresponding arrangement. The end of the support sleeve 11 near the active mechanism is provided with an outwardly protruding step. This step, together with the locking nut 2, 16, secures the support sleeve 11 to the clamping arm 2, 40.

[0031] The positioning sleeve 20 is fixed on the second clamping arm 40 via the mounting seat 28 .

[0032] After completing the installation and fixation of the support sleeve 11 on the clamping arm 2 40, operating the lock nut 18 and the compression spring 2 19 to help adjust the upper and lower corresponding states of the turntable 17 and the deep groove ball bearing 26; the depth of the top screw 21 extending into the positioning sleeve 20 can adjust the extrusion force of the deep groove ball bearing 26 and the notch; the side positioning screw 27 cooperates with the extreme displacement limiting groove on the bearing guide rod 23 to control the extreme distance of the bearing guide rod 23 for up and down displacement adjustment in the positioning sleeve 20.

[0033] The utility model discloses a driven flipping mechanism for casting, in order to eliminate the risk of damage to the sand mold, when flipping, one end should be equipped with a rotating oil cylinder, which is an active mechanism, and the other end should not be equipped with a rotating oil cylinder, which rotates synchronously with the active mechanism, which is a driven mechanism, thereby eliminating the problem of cylinder asynchrony and avoiding damage to the sand mold.

[0034] The rotating shaft rotates in the supporting sleeve, and can cooperate with the active mechanism to complete the structure of only one side providing the flipping power and the other side being driven to cooperate, which ensures the synchronous flipping action of the sand mold without a sand box; the bearing guide rod can cooperate with the turntable that rotates synchronously with the rotating shaft under the squeezing action of the compression spring 1. When flipping 0° and 180°, the bearing guide rod is stuck in the notch to limit the position, which helps to achieve the control and limit of the flipping angle of the sand mold.

[0035] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0036] The terms "upper," "lower," "outer," "inner," and the like, if used in the specification and claims of the present invention and the accompanying drawings, are used to distinguish relative positions and do not necessarily define them. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0037] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driven turning mechanism for casting, used to cooperate with an active mechanism to clamp and turn a sand mold, comprising a support sleeve (11) and a rotating shaft (12) rotatably arranged in the support sleeve (11), characterized in that: A turntable (17) is provided at one end of the rotating shaft (12) away from the active mechanism, and notches are provided at both ends of the diameter line of the turntable (17); a positioning sleeve (20) is provided above the turntable (17), and the inner top of the positioning sleeve (20) is connected to a bearing guide rod (23) extending downward from the positioning sleeve (20) and capable of matching with the notch through a compression spring (22).

2. A driven turning mechanism for casting according to claim 1, characterized in that: A fixed shaft (25) is installed at the lower end of the bearing guide rod (23), and a deep groove ball bearing (26) capable of matching with the notch is provided on the fixed shaft (25).

3. A driven turning mechanism for casting according to claim 2, characterized in that: The fixed shafts (25) on both sides of the bearing guide rod (23) are provided with shaft retaining rings capable of limiting the axial displacement of the fixed shafts (25).

4. A driven turning mechanism for casting according to any one of claims 1 to 3, characterized in that: The top of the positioning sleeve (20) is threadedly connected with a top screw (21) that abuts against a compression spring (22).

5. A driven turning mechanism for casting according to claim 4, characterized in that: A spring pressure plate (24) is provided between the top wire (21) and the compression spring (22).

6. A driven turning mechanism for casting according to any one of claims 1 to 3, characterized in that: A positioning screw (27) capable of abutting against the bearing guide rod (23) is threadedly connected to the side wall of the positioning sleeve (20); and a limit displacement limiting groove matching the positioning screw (27) is provided on the side surface of the bearing guide rod (23) close to the positioning screw (27).

7. A driven turning mechanism for casting according to claim 6, characterized in that: An end cover (30) is sleeved on the end of the support sleeve (11) away from the active mechanism; a second compression spring (19) is sleeved on the rotating shaft (12) between the turntable (17) and the end cover (30); and a locking nut (18) is threadedly connected to the side of the turntable (17) away from the second compression spring (19).

8. A driven turning mechanism for casting according to any one of claims 1 to 3, characterized in that: The two ends of the inner space of the support sleeve (11) are connected to the rotating shaft (12) via a needle bearing (14) and a thrust ball bearing (13) respectively.

9. A driven turning mechanism for casting according to claim 8, characterized in that: An adjustment sleeve (15) is provided inside the end of the support sleeve (11) facing away from the active mechanism.

10. A driven turning mechanism for casting according to claim 9, characterized in that: A second shaft retaining ring capable of limiting the axial movement of the rotating shaft (12) is provided on the side of the adjusting sleeve (15) facing away from the active mechanism.

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