Special clamp for special-shaped casting

Abstract

The utility model discloses a special fixture for a special-shaped casting, and relates to the technical field of special-shaped casting fixtures, the special fixture comprises a placing plate, the left side and the right side of the upper surface of the placing plate are fixedly connected with electric push rods, the edge side of the upper surface of the placing plate is also fixedly connected with a limiting shaft, and the outer side of the limiting shaft is connected with a clamping bracket in a nested manner; the moving plate is fixedly connected to the output end of the electric push rod, and an adjusting mechanism capable of driving the clamping support to rotate is arranged between the upper surface of the moving plate and the inner edge end of the clamping support. According to the clamp special for the special-shaped casting, when the clamping support clamps the casting, the edge side of the casting can extrude the push plate, so that the push plate moves towards the interior of the storage cavity along the storage box, in the moving process of the push plate, the push plate can synchronously extrude the traction rope, and the fixed shaft is pulled through the traction rope; and at the moment, the fixing shaft is pulled to drive the auxiliary plate to rotate, so that the casting is further clamped and fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of special-shaped casting fixtures, in particular to a special-shaped casting fixture. Background Art

[0002] Precision castings often require high product precision and have different shapes. After the product is injection molded, the remaining risers on the product need to be further polished to ensure the precision required by the drawing and the consistency of the product.

[0003] In the existing technology, during the process of grinding the riser, either the product is held manually and then the riser is ground, or the riser is ground after being clamped using a universal fixture. Since the product is ground manually or clamped with a universal fixture, the product grinding accuracy and product consistency cannot be guaranteed, and the manual holding force and the clamping force of the universal fixture cannot be accurately controlled, which further leads to low processing efficiency.

[0004] To overcome the aforementioned drawbacks, prior art 1 (Patent Publication No. CN114536055B, Chinese Patent Publication Date: February 28, 2023) discloses a fixture for drilling oblique holes in special-shaped castings. This fixture utilizes a positioning or functional hole in the special-shaped casting, inserts a positioning rod into the hole, and adjusts the angle of a sphere so that the special-shaped casting contacts the bearing plate, completing pre-positioning of the special-shaped casting. A limiter assembly secures the sphere to prevent further rotation. A control system controls the power assembly to draw two sets of vertical plates, one facing each other, horizontally and vertically. Clamping assemblies on the vertical plates clamp the special-shaped casting from all sides, completing final fixation. Pre-positioning only requires access to a single positioning or functional hole in the special-shaped casting, allowing for subsequent, one-step clamping of the special-shaped casting from all four sides. This fixture is suitable for special-shaped castings of varying sizes and shapes, offering high versatility and helping to reduce production costs.

[0005] There is also prior art 2 (publication number: CN111098167A, Chinese patent with publication date of 2020-05-05) a high-precision fixture for drilling inclined holes in special-shaped castings for new energy vehicles. Through the coordinated use of a base plate, a guard plate, a positioning template, a positioning hole, a sample hole, a cavity, a threaded rod, a threaded sleeve, a connecting rod, a push rod, a splint, a fixing rod and a turntable, it can conveniently and quickly position and clamp special-shaped castings, improve the firmness and stability of the inclined hole processing of the casting after clamping, thereby improving the accuracy of the inclined hole processing of the casting and greatly improving the processing efficiency.

[0006] Although existing technologies 1 and 2 can clamp castings and reduce the phenomenon of users holding castings for processing, they can mostly only perform clamping operations at a single angle when clamping castings, and cannot simultaneously clamp and limit the castings at multiple angles. When the castings are fixed, there will be a certain degree of instability.

[0007] Therefore, we propose a special fixture for special-shaped castings to solve the above-mentioned problems. Utility Model Content

[0008] The purpose of the present utility model is to provide a special clamp for special-shaped castings to solve the problem proposed in the above-mentioned background technology that it can only perform clamping operations at a single angle and cannot clamp and limit the castings at multiple angles at the same time, and the castings will have certain instability when being fixed.

[0009] To achieve the above-mentioned object, the present invention provides the following technical solution: a special fixture for special-shaped castings, comprising a placement plate, wherein electric push rods are fixedly connected to the left and right sides of the upper surface of the placement plate, and a limit shaft is also fixedly connected to the side of the upper surface of the placement plate, and a clamping bracket is nested and connected to the outer side of the limit shaft;

[0010] A movable plate, the movable plate being fixedly connected to the output end of the electric push rod, and an adjusting mechanism capable of driving the clamping bracket to rotate is provided between the upper surface of the movable plate and the inner edge end of the clamping bracket;

[0011] A storage box is fixedly connected to the inner side of the outer end of the clamping bracket, and a push plate is nested inside the storage box. An auxiliary plate is provided on the upper surface of the clamping bracket, and a traction mechanism that can drive the auxiliary plate to rotate is provided inside the clamping bracket.

[0012] Furthermore, the adjustment mechanism includes a fixed column, which is fixedly connected to the upper surface of the movable plate. A sliding groove is provided on the inner side end of the clamping bracket, and the fixed column is nested and connected inside the sliding groove.

[0013] Furthermore, the clamping bracket is arranged in a zigzag manner, and the clamping bracket forms a rotating structure through the fixed column and the limiting shaft, and the fixed column forms a sliding structure through the movable plate and the sliding groove.

[0014] Furthermore, the electric push rods are provided in two groups symmetrically about the center point of the placement plate, and the clamping brackets are provided in two groups symmetrically about the center point of the electric push rods.

[0015] Furthermore, the traction mechanism includes a fixed shaft, the fixed shaft is nested and connected to the outer end of the clamping bracket, and the outer side of the fixed shaft is fixedly connected to an auxiliary plate, and a torsion spring is fixedly connected between one side end of the auxiliary plate and the inner wall of the clamping bracket;

[0016] A receiving cavity is provided inside the clamping bracket, the inner side of the push plate is nested and connected inside the receiving cavity, a traction rope is fixedly connected inside the receiving cavity, and the other end of the traction rope is wound around a fixed shaft.

[0017] Furthermore, the push plate is located at the outer end of the traction rope, and the traction rope is in contact with the outer end of the push plate, and the fixed shaft forms a traction structure through the traction rope and the clamping bracket.

[0018] Furthermore, the auxiliary plate and the clamping bracket form an elastic structure through a torsion spring, and the auxiliary plate and the fixed shaft form an integrated structure, and the inner end of the traction rope has a certain elastic force.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The user can place the casting on the placement plate, then start the electric push rod, and drive the movable plate to move. At this time, the movable plate will synchronously drive the fixed column to move inside the slide groove on the side of the clamping bracket. The clamping bracket is thus rotated under the force and fixedly clamps the side of the casting, reducing the workload of the staff who have to hold the casting for subsequent processing;

[0021] 2. When the clamping bracket rotates, it will rotate along the limiting axis as the axis. At this time, the limiting axis will limit the clamping bracket, further improving the stability of the clamping bracket during rotation and clamping;

[0022] 3. When the clamping bracket clamps the casting, the side of the casting will squeeze the push plate, causing the push plate to move along the storage box into the storage cavity. When the push plate moves, it will simultaneously squeeze the traction rope and pull the fixed shaft through the traction rope. At this time, the fixed shaft will be pulled and the auxiliary plate will rotate, thereby further clamping and fixing the casting;

[0023] 4. When the traction rope is not under force, the traction rope does not pull the fixed shaft. Driven by the elastic force of the torsion spring, the fixed shaft will synchronously rotate and reset. At this time, the fixed shaft will drive the auxiliary plate to reset, so that the casting is not clamped. At this time, the processed casting can be picked up;

[0024] 5. The auxiliary plate and the clamping bracket cooperate with each other to clamp the casting at multiple angles at the same time, which can further improve the stability of the casting clamping and prevent the casting from shifting during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the top view of the structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the three-dimensional structure of the movable plate of the utility model;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the clamping bracket of the utility model;

[0029] Figure 5 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0030] Figure 6 This is a schematic diagram of the cross-sectional structure of the side end of the clamping bracket of the present invention.

[0031] In the figure: 1. Placement plate; 2. Electric push rod; 3. Moving plate; 4. Fixed column; 5. Clamping bracket; 6. Slide groove; 7. Limiting shaft; 8. Auxiliary plate; 9. Storage box; 10. Storage cavity; 11. Push plate; 12. Pull rope; 13. Torsion spring; 14. Fixed shaft. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1: Figure 1 and Figure 2 The technical solution shown in the figure, the present invention provides the following technical solution: a special fixture for special-shaped castings, which discloses a clamping bracket 5. The clamping bracket 5 cooperates with the auxiliary plate 8 to improve the stability of the casting clamping:

[0034] The placing plate 1 has electric push rods 2 fixedly connected to the left and right sides of the upper surface of the placing plate 1, and the side of the upper surface of the placing plate 1 is also fixedly connected to the limit shaft 7, and the outer side of the limit shaft 7 is nested with a clamping bracket 5, and the upper surface of the clamping bracket 5 is provided with an auxiliary plate 8;

[0035] The auxiliary plate 8 cooperates with the clamping bracket 5 to clamp the casting at multiple angles at the same time, which can further improve the stability of the casting clamping and prevent the casting from deflecting during processing.

[0036] Example 2: Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The technical solution shown in the figure, this utility model provides the following technical solutions: a special fixture for special-shaped castings, which discloses an adjustment mechanism, and the side of the casting can be fixed and limited by the adjustment mechanism:

[0037] The movable plate 3 is fixedly connected to the output end of the electric push rod 2, and an adjustment mechanism that can drive the clamping bracket 5 to rotate is provided between the upper surface of the movable plate 3 and the inner edge of the clamping bracket 5;

[0038] The adjusting mechanism includes a fixed column 4, which is fixedly connected to the upper surface of the movable plate 3. A slide groove 6 is provided at the inner edge of the clamping bracket 5. The fixed column 4 is nested and connected inside the slide groove 6. The clamping bracket 5 is arranged in a zigzag manner, and the clamping bracket 5 forms a rotating structure through the fixed column 4 and the limiting shaft 7, and the fixed column 4 forms a sliding structure through the movable plate 3 and the slide groove 6. The electric push rod 2 is symmetrically arranged in two groups about the center point of the placement plate 1, and the clamping bracket 5 is symmetrically arranged in two groups about the center point of the electric push rod 2.

[0039] The user can place the casting on the placement plate 1, then start the electric push rod 2, and drive the movable plate 3 to move through the electric push rod 2. At this time, the movable plate 3 will synchronously drive the fixed column 4 to move inside the slide groove 6 on the side of the clamping bracket 5, and the clamping bracket 5 will rotate under the force, and fix the side of the casting, reducing the workload of the staff for holding the casting for subsequent processing. When the clamping bracket 5 rotates, it will rotate along the limit shaft 7 as the axis. At this time, the limit shaft 7 will limit the clamping bracket 5, further improving the stability of the clamping bracket 5 during rotation and clamping.

[0040] Example 3: Figure 1 、 Figure 5 and Figure 6 The technical solution shown in the figure, this utility model provides the following technical solutions: a special fixture for special-shaped castings, which discloses a traction mechanism, and can drive the auxiliary plate 8 to assist in fixing the workpiece through the traction mechanism:

[0041] The storage box 9 is fixedly connected to the inner side of the outer end of the clamping bracket 5, and the push plate 11 is nested inside the storage box 9, and the clamping bracket 5 is provided with a traction mechanism that can drive the auxiliary plate 8 to rotate;

[0042] The traction mechanism includes a fixed shaft 14, which is nested and connected to the outer end of the clamping bracket 5, and the outer side of the fixed shaft 14 is fixedly connected to the auxiliary plate 8, and a torsion spring 13 is fixedly connected between one side end of the auxiliary plate 8 and the inner wall of the clamping bracket 5. A storage chamber 10 is opened inside the clamping bracket 5, and the inner side of the push plate 11 is nested and connected inside the storage chamber 10. A traction rope 12 is fixedly connected inside the storage chamber 10, and the other end of the traction rope 12 is wound around the fixed shaft 14;

[0043] The push plate 11 is located at the outer end of the traction rope 12, and the traction rope 12 is fitted with the outer end of the push plate 11. The fixed shaft 14 forms a traction structure with the clamping bracket 5 through the traction rope 12. The auxiliary plate 8 forms an elastic structure with the clamping bracket 5 through the torsion spring 13, and the auxiliary plate 8 and the fixed shaft 14 form an integrated structure. The inner end of the traction rope 12 has a certain elastic force.

[0044] When the clamping bracket 5 clamps the casting, the side of the casting will squeeze the push plate 11, so that the push plate 11 moves along the storage box 9 toward the inside of the storage cavity 10. When the push plate 11 moves, it will synchronously squeeze the traction rope 12 and pull the fixed shaft 14 through the traction rope 12. At this time, the fixed shaft 14 is pulled to drive the auxiliary plate 8 to rotate, thereby further clamping and fixing the casting. When the traction rope 12 is not under force, the traction rope 12 does not pull the fixed shaft 14. Driven by the elastic force of the torsion spring 13, the fixed shaft 14 will synchronously rotate and reset. At this time, the fixed shaft 14 will drive the auxiliary plate 8 to reset, thereby not clamping the casting, and the processed casting can be taken out.

[0045] The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special fixture for special-shaped castings, comprising a placement plate (1), wherein electric push rods (2) are fixedly connected to the left and right sides of the upper surface of the placement plate (1), and a limiting shaft (7) is fixedly connected to the side of the upper surface of the placement plate (1), and a clamping bracket (5) is nested and connected to the outer side of the limiting shaft (7); Its characteristics are: Also includes: A movable plate (3), wherein the movable plate (3) is fixedly connected to the output end of the electric push rod (2), and an adjustment mechanism capable of driving the clamping bracket (5) to rotate is provided between the upper surface of the movable plate (3) and the inner edge of the clamping bracket (5); A storage box (9) is fixedly connected to the inner side of the outer end of the clamping bracket (5), and a push plate (11) is nested and connected inside the storage box (9), an auxiliary plate (8) is provided on the upper surface of the clamping bracket (5), and a traction mechanism that can drive the auxiliary plate (8) to rotate is provided inside the clamping bracket (5).

2. The special fixture for special-shaped castings according to claim 1, characterized in that: The adjustment mechanism includes a fixed column (4), the fixed column (4) is fixedly connected to the upper surface of the movable plate (3), the inner side end of the clamping bracket (5) is provided with a sliding groove (6), and the fixed column (4) is nested and connected inside the sliding groove (6).

3. The special fixture for special-shaped castings according to claim 2, characterized in that: The clamping bracket (5) is arranged in a zigzag manner, and the clamping bracket (5) forms a rotating structure through the fixed column (4) and the limiting shaft (7), and the fixed column (4) forms a sliding structure through the movable plate (3) and the sliding groove (6).

4. The special fixture for special-shaped castings according to claim 2, characterized in that: The electric push rods (2) are provided in two groups symmetrically about the center point of the placement plate (1), and the clamping brackets (5) are provided in two groups symmetrically about the center point of the electric push rods (2).

5. The special fixture for special-shaped castings according to claim 1, characterized in that: The traction mechanism includes a fixed shaft (14), the fixed shaft (14) is nested and connected to the outer end of the clamping bracket (5), and the outer side of the fixed shaft (14) is fixedly connected to an auxiliary plate (8), and a torsion spring (13) is fixedly connected between a side end of the auxiliary plate (8) and the inner wall of the clamping bracket (5); A receiving chamber (10) is provided inside the clamping bracket (5), the inner side of the push plate (11) is nested and connected inside the receiving chamber (10), a traction rope (12) is fixedly connected inside the receiving chamber (10), and the other end of the traction rope (12) is wound around a fixed shaft (14).

6. The special fixture for special-shaped castings according to claim 5, characterized in that: The push plate (11) is located at the outer end of the traction rope (12), and the traction rope (12) fits the outer end of the push plate (11). The fixed shaft (14) forms a traction structure with the clamping bracket (5) through the traction rope (12).

7. The special fixture for special-shaped castings according to claim 6, characterized in that: The auxiliary plate (8) forms an elastic structure with the clamping bracket (5) via a torsion spring (13), and the auxiliary plate (8) and the fixed shaft (14) form an integrated structure. The inner end of the traction rope (12) has a certain elastic force.

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