Ejector device and machine tool including the ejector device

Abstract

The present invention relates to an ejection device and a machine tool including the ejection device, the ejection device is used to position and eject a floating fixture, a station installation hole for installing the floating fixture is provided on a turntable, the ejection device comprises a cylinder capable of abutting or separating with the floating fixture and a base located below the turntable, the cylinder is movably arranged on the base along a vertical direction, guide blocks are provided on the turntable and on two opposite sides of the station installation hole, guide grooves are formed between the two side guide blocks and the turntable respectively, the cylinder can rotate relative to the turntable during the rotation of the turntable and can also slide into or out of the guide groove, when the ejection device positions and ejects the floating fixture, the cylinder rotates relative to the turntable into the guide groove and abuts against the floating fixture. When the ejection device positions and ejects the floating fixture, the reaction force of the floating fixture on the cylinder is applied to the guide block, thereby converting the ejection force of the cylinder on the floating fixture into the internal stress of the turntable, avoiding affecting the flatness of the turntable.

Description

Technical Field

[0001] The invention belongs to the technical field of honing processing equipment, and in particular relates to an ejection device and a machine tool containing the ejection device. Background Art

[0002] On an automated machine tool workbench with a turntable, the turntable is usually divided into several equal stations, such as loading and unloading stations, processing stations, measuring stations, etc. Among them, at the loading and unloading stations, in order to ensure that the floating fixture placed at the loading and unloading stations is fixed in position, it is usually necessary to place an ejection cylinder at the bottom of the station, hold the floating fixture to fix the floating fixture relative to the turntable to position the floating fixture, or loosen the part clamping device on the fixture to achieve the removal or placement of the part, or both. In the prior art, the cylinder is usually directly fixed on the turntable, although it can also achieve the fixation and ejection of the floating fixture, but the cylinder is directly fixed on the turntable. Since the cylinder needs to be connected to the air pipe, and the turntable is rotating, it is necessary to use a special rotary joint to connect the air pipe to the cylinder to ensure that the air pipe will not be entangled during the rotation of the turntable and can be ventilated normally. In addition, a plurality of floating fixtures are usually arranged on the turntable, which requires each floating fixture to be equipped with a cylinder, which not only increases the cost, but also requires each cylinder to be equipped with an air pipe, which further increases the difficulty of installing the air pipe on the cylinder. In addition, too many air pipes lead to a complex structure of the machine tool. In the prior art, there is also a method of installing the cylinder on the machine tool platform and directly ejecting the cylinder on the turntable. Since the cylinder is directly fixed on the machine tool platform, the ejection force of the cylinder acts on the floating fixture, and the floating fixture transmits the force to the turntable. When the ejection force of the cylinder is large, a large eccentric torque will be applied to the turntable, thereby affecting the flatness of the turntable. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an ejection device which has a simple structure and has little or no effect on the flatness of the turntable.

[0004] A second object of the present invention is to provide a machine tool comprising the above-mentioned ejection device.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A ejection device is used to position and eject a floating fixture on a turntable. The ejection device includes a cylinder for fixing the floating fixture relatively to the turntable for positioning and ejection. The cylinder can abut or separate from the floating fixture. When the cylinder abuts against the floating fixture, the floating fixture is relatively fixed to the turntable. The turntable has a station mounting hole for mounting the floating fixture. The ejection device also includes a base located below the turntable. The cylinder is movably arranged on the base along a vertical direction. Guide blocks are provided on the turntable and on two opposite sides of the station mounting hole. Guide grooves are formed between the guide blocks on the two sides and the turntable respectively. The cylinder can rotate relative to the turntable during the rotation of the turntable and can also slide into or out of the guide groove. When the ejection device positions and ejects the floating fixture, the cylinder rotates relative to the turntable into the guide groove and abuts against the floating fixture through the station mounting hole.

[0007] According to some embodiments of the present invention, the cylinder includes a cylinder body, a top block connected to the piston rod of the cylinder body and abutting or separating from the floating fixture, a sliding block arranged on the cylinder body and capable of sliding into or out of the guide groove, and a guide column arranged on the cylinder body and movably arranged with the base. When the cylinder rotates relative to the turntable, the top block is located outside the work station mounting hole; when the ejection device positions and ejects the floating fixture, the top block moves upward into the work station mounting hole and abuts against the floating fixture.

[0008] In some preferred and specific embodiments, the slider includes a fixed portion whose lower end is fixed to the cylinder body and a sliding portion that is bent outward and extends from two opposite sides of the upper end of the fixed portion, and the sliding portion on each side can slide into or out of the guide groove on the corresponding side.

[0009] In some specific embodiments, the sliding part can slide in the vertical direction in the guide groove; and / or, when the ejection device positions and ejects the floating fixture, the lower surface of the sliding part abuts against the guide block, and the upper surface of the sliding part is separated from the turntable; when the ejection block is separated from the floating fixture, the upper surface of the sliding part abuts against the turntable, and the lower surface of the sliding part is separated from the guide block.

[0010] According to some implementation aspects of the present invention, the ejection device further includes an elastic member disposed between the cylinder body and the base for driving the cylinder to move upward.

[0011] In some preferred and specific embodiments, the elastic member is a spring, and the spring is sleeved on the guide column.

[0012] According to some implementation aspects of the present invention, a slot is disposed on the base at a position corresponding to the guide post, and the guide post is movably inserted into the slot along a vertical direction.

[0013] In some preferred and specific embodiments, a limit block is provided at the lower end of the guide post for preventing the guide post from escaping from the slot.

[0014] According to some implementation aspects of the present invention, a plurality of station mounting holes are provided on the turntable, and the guide blocks are provided on the turntable and on two opposite sides of each of the station mounting holes; and / or, the guide blocks are provided on the lower surface of the turntable.

[0015] The second technical solution adopted by the present invention is: a machine tool, including a frame, a turntable rotatably arranged on the frame and a floating clamp movably arranged on the turntable, and the machine tool also includes the ejection device described above.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The ejection device of the present invention movably sets the cylinder on the base instead of fixing it on the turntable, which greatly simplifies the air pipe connection method of the cylinder; and when the cylinder positions and ejects the floating fixture, the reaction force of the floating fixture on the cylinder is applied to the guide block, thereby converting the ejection force of the cylinder on the floating fixture into the internal stress of the turntable, avoiding affecting the flatness of the turntable.

[0018] The ejection device of the present invention, when a plurality of station mounting holes are arranged on a turntable, only needs to be provided with one cylinder to complete the positioning and ejection of the floating fixtures on the plurality of stations on the turntable, without having to provide a corresponding cylinder for each station, thereby greatly simplifying the entire machine tool structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a top view of a machine tool according to an embodiment of the present invention (showing the internal structure);

[0020] Figure 2 A schematic diagram of a top view of a machine tool according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 AA section structure diagram in (showing the internal structure);

[0022] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;

[0023] Figure 5 for Figure 2 AA-direction cross-sectional structural diagram;

[0024] Figure 6 for Figure 5 The enlarged schematic diagram at C in the middle;

[0025] Figure 7 It is a side view schematic diagram of the structure of an embodiment of the present invention;

[0026] In the figure: 1. turntable; 2. floating fixture; 3. workstation mounting hole; 4. cylinder; 4a. cylinder body; 4b. guide column; 4c. slider; 4c1. fixed part; 4c2. sliding part; 4d. top block; 5. guide block; 6. base; 7. spring; 8. limit block; 9. slot; 10. frame. DETAILED DESCRIPTION

[0027] The present invention is further described below with reference to the accompanying drawings and specific embodiments:

[0028] See also Figures 1 to 7 The machine tool shown includes a frame 10, a turntable 1 rotatably arranged on the frame 10, a floating fixture 2 movably arranged on the turntable 1, and an ejection device for positioning and ejecting the floating fixture 2 on the turntable 1. The ejection device includes a cylinder 4 for relatively fixing the floating fixture 2 on the turntable 1 for positioning and ejecting. The cylinder 4 can abut against or separate from the floating fixture 2. When the cylinder 4 abuts against the floating fixture 2, the floating fixture 2 is relatively fixed to the turntable 1.

[0029] In this example, the turntable 1 has a station mounting hole 3 for mounting the floating fixture 2. The ejection device also includes a base 6 located below the turntable 1. The cylinder 4 is movably arranged on the base 6 along the vertical direction. Guide blocks 5 are provided on the lower surface of the turntable 1 and on two opposite sides of the station mounting hole 3. Guide grooves are respectively formed between the guide blocks 5 on both sides and the lower surface of the turntable 1. The cylinder 4 can rotate relative to the turntable 1 during the rotation of the turntable 1 and can also slide into or out of the guide groove. When the ejection device positions and ejects the floating fixture 2, the cylinder 4 rotates relative to the turntable 1 into the guide groove and abuts against the floating fixture 2 through the station mounting hole 3.

[0030] See also Figure 6 As shown, the cylinder 4 includes a cylinder body 4a, a top block 4d connected to the piston rod of the cylinder body 4a and abutting or separating from the floating fixture 2, a slider 4c arranged on the upper part of the cylinder body 4a and capable of sliding into or out of the guide groove, and a guide column 4b arranged on the lower part of the cylinder body 4a and movably arranged with the base 6. When the cylinder 4 rotates relative to the turntable 1, the top block 4d is located outside the station mounting hole 3; when the ejection device positions and ejects the floating fixture 2, the top block 4d moves upward to the station mounting hole and abuts against the floating fixture 2.

[0031] The slider 4c includes a fixed portion 4c1 fixed to the cylinder body 4a at the lower end thereof and a sliding portion 4c2 bent outwardly and extended horizontally from two opposite sides of the upper end of the fixed portion 4c1. The sliding portion 4c2 on each side can slide into or out of the guide groove on the corresponding side. The sliding portion 4c2 can slide in the vertical direction in the guide groove. When the ejection device positions and ejects the floating fixture 2 and the ejection block 4d abuts against the floating fixture 2, the lower surface of the sliding portion 4c2 abuts against the guide block 5, and the upper surface of the sliding portion 4c2 is separated from the lower surface of the turntable 1; when the ejection block 4d is separated from the floating fixture 2, the upper surface of the sliding portion 4c2 abuts against the lower surface of the turntable 1, and the lower surface of the sliding portion 4c2 is separated from the guide block 5.

[0032] See also Figure 4 The ejection device further includes an elastic member disposed between the cylinder body 4a and the base 6 for driving the cylinder 4 to move upward, the elastic member being a spring 7, which is sleeved on the guide post 4b. The base 6 is provided with a slot 9 corresponding to the position of the guide post 4b, the guide post 4b is movably inserted into the slot 9 along the vertical direction, and a stopper 8 is provided at the lower end of the guide post 4b for preventing the guide post 4b from being separated from the slot 9.

[0033] In this example, a plurality of station mounting holes 3 are provided on the turntable 1, and guide blocks 5 are provided on the lower surface of the turntable 1 and on two opposite sides of each station mounting hole 3. The floating fixtures 2 on the plurality of station mounting holes 3 can share one cylinder 4, greatly simplifying the structure of the entire machine tool.

[0034] Working principle of the machine tool with the above settings:

[0035] The floating fixture 2 is movably installed in the work station mounting hole 3. When the floating fixture 2 needs to be positioned and ejected, the turntable 1 rotates so that the slider 4c of the cylinder 4 rotates relative to the turntable 1 until it slides into the guide groove. The cylinder body 4a drives the ejector block 4d to move upward and abut against the floating fixture 2. The floating fixture 2 is fixed relative to the turntable 1, so as to facilitate the loading and unloading of workpieces on the floating fixture 2.

[0036] When the ejector block 4d abuts against the floating fixture 2, the floating fixture 2 has a reaction force on the ejector block 4d. Under the action of the reaction force, the cylinder 4 compresses the spring 7, and the cylinder 4 moves downward until the lower surface of the sliding portion 4c2 of the slider 4c abuts against the guide block 5. The reaction force is applied to the guide block 5, and the guide block 5 is fixed on the turntable 1, thereby converting the ejection force into the internal stress of the turntable 1, which does not affect the flatness of the turntable 1.

[0037] In addition, the cylinder 4 of the machine tool is movably arranged on the base 6, rather than being fixed on the turntable 1. Compared with the traditional method of fixing the cylinder 4 on the turntable 1, the connection method of the cylinder air pipe is greatly simplified, and the use of a complex adapter to connect the air pipe to the cylinder is avoided. In addition, it is not directly fixed on the platform, and the floating fixture is directly positioned and ejected, which reduces the eccentric moment applied to the platform and converts the ejection force into the internal stress of the turntable 1.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An ejection device for positioning and ejecting a floating fixture on a turntable, the ejection device comprising a cylinder for relatively fixing the floating fixture on the turntable for positioning and ejection, the cylinder being able to abut against or separate from the floating fixture, when the cylinder abuts against the floating fixture, the floating fixture is relatively fixed to the turntable, characterized in that: The turntable is provided with a station installation hole for installing the floating fixture, the ejection device also includes a base located below the turntable, the cylinder is movably arranged on the base in a vertical direction, and guide blocks are provided on the turntable and on two opposite sides of the station installation hole, and guide grooves are respectively formed between the guide blocks on the two sides and the turntable, and the cylinder can rotate relative to the turntable during the rotation of the turntable and can also slide into or out of the guide groove, and when the ejection device positions and ejects the floating fixture, the cylinder rotates relative to the turntable into the guide groove and abuts against the floating fixture through the station installation hole; The cylinder comprises a cylinder body, a top block connected to a piston rod of the cylinder body and abutting or separating from the floating fixture, a slider arranged on the cylinder body and capable of sliding into or out of the guide groove, and a guide column arranged on the cylinder body and movably arranged with the base. When the cylinder rotates relative to the turntable, the top block is located outside the station mounting hole; when the ejection device positions and ejects the floating fixture, the top block moves upward into the station mounting hole and abuts against the floating fixture. The slider includes a fixing portion whose lower end is fixed to the cylinder body and a sliding portion that is bent outward and extends from two opposite sides of the upper end of the fixing portion, and the sliding portion on each side can slide into or out of the guide groove on the corresponding side; When the ejection device positions and ejects the floating fixture, when the ejection block abuts against the floating fixture, the lower surface of the sliding part abuts against the guide block, and the upper surface of the sliding part is separated from the turntable; The ejection device also includes an elastic member disposed between the cylinder body and the base for driving the cylinder to move upward; The base is provided with a slot corresponding to the position of the guide post, and the guide post is movably inserted into the slot along a vertical direction.

2. The ejection device according to claim 1, characterized in that: The sliding part can slide in the guide groove along the vertical direction; and / or, when the ejection device positions and ejects the floating fixture, when the ejection block is separated from the floating fixture, the upper surface of the sliding part abuts against the turntable, and the lower surface of the sliding part is separated from the guide block.

3. The ejection device according to claim 1, characterized in that: The elastic member is a spring, and the spring is sleeved on the guide column.

4. The ejection device according to claim 1, characterized in that: A limiting block is provided at the lower end of the guide post for preventing the guide post from being separated from the slot.

5. The ejection device according to claim 1, characterized in that: A plurality of station installation holes are arranged on the turntable, and the guide blocks are arranged on the turntable and on two opposite sides of each of the station installation holes; and / or the guide blocks are arranged on the lower surface of the turntable.

6. A machine tool, comprising a frame, a turntable rotatably arranged on the frame, and a floating fixture movably arranged on the turntable, characterized in that: The machine tool further comprises an ejection device according to any one of claims 1 to 5.

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