Improved auxiliary main shaft center-moving type material ejecting mechanism

Abstract

The utility model discloses an improved auxiliary main shaft core-moving type material ejecting mechanism which comprises a pull rod and a material pushing rod, a clamping head and an oil cylinder are arranged at the two ends of the pull rod respectively, a mounting frame is arranged at the tail end of the oil cylinder, a positioning guide sleeve is arranged on the mounting frame and extends into the pull rod, and the material pushing rod is arranged on the positioning guide sleeve. The material pushing rod is arranged in the positioning guide sleeve, the two ends of the material pushing rod extend out, one end of the material pushing rod extends out of the mounting frame and is connected with the pushing air cylinder, and the other end of the material pushing rod is provided with a material ejecting head and is arranged in the pull rod in a suspended mode. The material ejection mechanism is smooth in material ejection, and use stability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to a sub-spindle center-moving type ejecting mechanism. Background Art

[0002] With the development of the market, industrial automation and intelligence have become the main directions of future industrial development. Their advantage lies in achieving higher output.

[0003] In the automation industry, for machines equipped with sub-spindles, ensuring the stability of the sub-spindle's material retraction function and its coordinated functionality with automated equipment is a top priority during downstream machining. Conventional ejection systems utilize ejector pins installed within the sub-spindle. These pins are secured to the sub-spindle's tie rods via self-lubricating bearings at both ends. A hydraulic or pneumatic cylinder drives the pins out, enabling the ejection function within the spindle.

[0004] One of the self-lubricating bearings is set in the pull rod at the chuck position, which is fixed to the pull rod through a sleeve. Since the ejector rod set inside the pull rod does not rotate, while the pull rod needs to rotate, the two are supported by the self-lubricating bearing, which is easy to heat up during high-speed rotation, causing the ejector rod to get stuck and unable to extend and move. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a sub-spindle center-type ejecting mechanism, which can eject materials smoothly and greatly improve the stability in use.

[0006] In order to solve the above technical problems, the utility model provides a sub-spindle central-type ejecting mechanism, including a pull rod and a push rod, wherein the two ends of the pull rod are respectively provided with a chuck and an oil cylinder, and the tail end of the oil cylinder is provided with a mounting frame, and the mounting is provided with a positioning guide sleeve, and the positioning guide sleeve is extended into the interior of the pull rod, and the push rod is arranged in the positioning guide sleeve and is extended at both ends, one end of the push rod extends out of the mounting frame and is connected to the pushing cylinder, and the other end of the push rod is provided with a ejecting head and is suspended inside the pull rod.

[0007] Furthermore, the end of the positioning guide sleeve is arranged close to the chuck.

[0008] Furthermore, axial reinforcement ribs are provided on the outer surface of the positioning guide sleeve.

[0009] Furthermore, the mounting frame includes a cylinder and an end plate, the cylinder is fixedly connected to the oil cylinder, the end plate is arranged on one end of the cylinder and cooperates to form a closed chamber, the positioning guide sleeve and the pushing cylinder are both fixedly connected to the end plate, and the cylinder rod of the pushing cylinder is connected to the end of the pushing rod through a connecting plate.

[0010] Furthermore, an oil cylinder displacement detection sensor is provided at the upper radial portion of the cylinder.

[0011] Furthermore, a liquid discharge port is provided at the lower portion of the cylinder along the radial direction, and a guide pipe is provided on the liquid discharge port.

[0012] Furthermore, a conducting hole is provided in the push rod, and a flow channel is provided in the ejecting head. One end of the conducting hole is connected to the flow channel, and the other end of the conducting hole is connected to two one-way valves through a three-way joint. The two one-way valves are respectively connected to the air supply pipe and the liquid supply pipe.

[0013] Furthermore, the flow channel includes a central connecting channel, one end of which is connected to the conducting hole, and the other end of which is connected to branch channels evenly distributed on the periphery of the central connecting channel.

[0014] Beneficial effects of the utility model:

[0015] The push rod is fixed in the center position by a positioning guide sleeve, and the design of one end being suspended can eliminate the use of a sleeve and a bearing, thereby eliminating the problem of the push rod being stuck due to high heat generated by rotation.

[0016] Due to the suspended design, the size of the ejector head does not need to match the inner hole of the sleeve, which provides better versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the ejector head of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the mounting frame of the utility model;

[0021] Figure 5 It is a schematic diagram of the connection structure of the tail end of the push rod of the utility model. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0023] Reference Figures 1 to 3As shown, an embodiment of the sub-spindle central-type ejecting mechanism of the utility model includes a pull rod 1 and a push rod 2. A chuck 3 and a cylinder 4 are respectively provided at both ends of the pull rod. A mounting frame 5 is provided on the tail end of the cylinder. A positioning guide sleeve 6 is provided on the mounting frame. The positioning guide sleeve is extended into the interior of the pull rod. The ejector rod is arranged in the positioning guide sleeve and both ends are extended out. One end of the ejector rod extends out of the mounting frame and is connected to the pushing cylinder 7. A ejector head 8 is provided on the other end of the ejector rod and is suspended inside the pull rod.

[0024] The oil cylinder drives the pull rod to extend and retract, and the pull rod drives the chuck to clamp or release the workpiece. During the machining process, the chuck and pull rod rotate synchronously, while the oil cylinder does not rotate. During this rotation, since the push rod and the ejector head are suspended inside the pull rod, there is no frictional heat generation. The rear end of the positioning guide sleeve is fixed to the mounting bracket, which does not rotate but also generates heat, so the push rod can always maintain a smooth push and pull action. The push-pull rod is driven to extend and retract by the push cylinder, and the ejector head on the push rod is used to eject the workpiece from the chuck.

[0025] To prevent the push rod from bending and deforming due to its own weight at the end of the ejector head, resulting in it being unable to extend out of the center, the end of the positioning guide sleeve is extended to a position close to the chuck. The positioning guide sleeve has multiple wall thickness settings, and a flange is set at the tail end to lock with the mounting frame. The force is greatest here, so the wall thickness of the positioning guide sleeve is the largest here and then gradually decreases. This ensures that its strength meets positioning requirements and its weight is controlled. To improve the overall strength of the positioning guide sleeve, axial reinforcement ribs can be set on the outer surface of the thinner wall to prevent it from deforming after long-term stress.

[0026] The above-mentioned mounting frame includes a cylinder 9 and an end plate 10. The cylinder is fixedly connected to the cylinder. The end plate is arranged on one end of the cylinder and cooperates to form a closed chamber, which can effectively transfer the weight on the end plate to the cylinder, and the relatively closed structure can effectively protect the internal components; the positioning guide sleeve and the pushing cylinder are both fixedly connected to the end plate, and the cylinder rod of the pushing cylinder is connected to the end of the push rod through the connecting plate 11.

[0027] A cylinder displacement detection sensor 12 is provided in the upper radial portion of the cylinder body. The installation position is fixed, convenient and reliable, and is also protected by the cylinder body. A drain port 13 is also provided in the lower radial portion of the cylinder body. A guide pipe is provided on the drain port. When the cylinder is in operation, oil leakage is inevitable at its tail end. The cylinder body can receive and lead out the leaked oil to avoid dripping onto other parts of the equipment. At the same time, since there is no sleeve, the liquid during processing will enter the interior from the end of the pull rod. The cylinder body design can drain this part of the liquid to avoid internal liquid accumulation affecting use and flowing out onto the machine.

[0028] Reference Figure 4 and Figure 5 As shown, a conducting hole 14 can also be provided in the push rod, and a flow channel can be provided in the ejector head. One end of the conducting hole is connected to the flow channel, and the other end of the conducting hole is connected to two one-way valves 15 through a three-way joint. The two one-way valves are respectively connected to the air supply pipe and the liquid supply pipe. By supplying gas or liquid into the push rod and finally releasing it from the flow channel, the purpose of supplying liquid or gas is achieved. The one-way valve ensures that the gas and liquid do not interfere with each other when they are supplied, and through the setting of the connecting plate, the three-way joint can be directly installed on the end of the push rod, which is convenient for assembly.

[0029] The flow channel includes a central connecting channel 16, one end of which is connected to the guide hole, and the other end is connected to the branch channels 17 evenly distributed on the outer periphery of the central connecting channel. The branch channels are arranged obliquely, and the air or liquid supply direction is determined, uniform and reliable.

[0030] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention shall fall within the protection scope of the present invention.

Claims

1. An improved sub-spindle center-type ejecting mechanism, characterized in that: It includes a pull rod and a push rod, and the two ends of the pull rod are respectively provided with a chuck and a cylinder, and the tail end of the cylinder is provided with a mounting frame, and the mounting is provided with a positioning guide sleeve, and the positioning guide sleeve is extended into the interior of the pull rod. The push rod is arranged in the positioning guide sleeve and both ends are extended out. One end of the push rod extends out of the mounting frame and is connected to the pushing cylinder, and the other end of the push rod is provided with a push head and is suspended inside the pull rod.

2. The improved sub-spindle center-type ejecting mechanism according to claim 1, characterized in that: The end of the positioning guide sleeve is arranged close to the clamping head.

3. The improved sub-spindle center-moving ejector mechanism according to claim 1, characterized in that: Axial reinforcement ribs are provided on the outer surface of the positioning guide sleeve.

4. The improved sub-spindle center-moving ejector mechanism according to claim 1, characterized in that: The mounting frame includes a cylinder and an end plate, the cylinder is fixedly connected to the oil cylinder, the end plate is arranged on one end of the cylinder and cooperates to form a closed chamber, the positioning guide sleeve and the pushing cylinder are both fixedly connected to the end plate, and the cylinder rod of the pushing cylinder is connected to the end of the pushing rod through a connecting plate.

5. The improved sub-spindle center-moving ejector mechanism according to claim 4, characterized in that: An oil cylinder displacement detection sensor is provided at the upper radial portion of the cylinder.

6. The improved sub-spindle center-moving ejector mechanism according to claim 4, characterized in that: A liquid discharge port is provided at the lower portion of the cylinder along the radial direction, and a flow guide pipe is provided on the liquid discharge port.

7. The improved sub-spindle center-moving ejector mechanism according to claim 1, characterized in that: A conducting hole is provided in the push rod, and a flow channel is provided in the ejector head. One end of the conducting hole is connected to the flow channel, and the other end of the conducting hole is connected to two one-way valves through a three-way joint. The two one-way valves are respectively connected to the air supply pipe and the liquid supply pipe.

8. The improved sub-spindle center-moving ejector mechanism according to claim 7, characterized in that: The flow channel includes a central connecting channel, one end of which is connected to the conducting hole, and the other end of which is connected to branch channels evenly distributed on the periphery of the central connecting channel.

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