Clamping system and machine tool

Abstract

The utility model relates to the technical field of workpiece clamping, and provides a clamping system and a machine tool, and the clamping system comprises a main shell, a rotating main body, a driving motor, a first bearing and a second bearing. Wherein an accommodating space is formed in the main shell; the rotating main body is rotationally arranged in the accommodating space along the axial direction of the rotating main body; the driving motor is connected with the rotating main body; the first bearing and the second bearing are both arranged on the rotating body in a sleeving mode. According to the clamping system, the first bearing and the second bearing are arranged between the rotating body and the main shell to support the main shell in a matched mode, so that the main shell and the rotating body can be connected into a whole and can rotate, it is guaranteed that all structural components do not affect each other when the system works, the structure of the clamping system is simplified, and the working efficiency is improved. The dependence on the technical level of installation personnel is reduced, and the maintenance difficulty is reduced; and the first bearing and the second bearing are arranged between the rotating main body and the main shell, so that the bearings can be prevented from being damaged under the action of pulling force.

Description

Technical Field

[0001] This utility model relates to the field of workpiece clamping technology, specifically to a clamping system and machine tool. Background Technology

[0002] When machining workpieces, they typically need to be clamped. Generally, the workpiece is fixed to the machine tool by a clamping device (e.g., a chuck), which rotates at high speed driven by a motor. The cutting tool is controlled to carve on the workpiece surface, thus achieving the "tool feed" and completing the machining process. A chuck is a mechanical device on a machine tool used to clamp workpieces. It utilizes the radial movement of movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: the chuck body, the movable jaws, and the jaw drive motor assembly.

[0003] Currently, the main installation methods for clamping devices on CNC machine tools are to fix the outer casing to the tail end of the machine tool spindle using different mounting flanges, or to use a multi-bearing load-bearing structure to fix the outer casing and the rotation and tension generating structure to the machine tool spindle through the same flange, for example: Chinese Patent (Patent Announcement No.: 202210053978.9).

[0004] However, among the related workpiece clamping devices, this device has a complex structure, requires many parts for installation, and demands a high level of technical skill from the installers; in addition, its external bearing structure limits its application range, and its structure is prone to damage under high tensile working conditions. Utility Model Content

[0005] In view of the above-mentioned defects in the prior art, the present invention provides a clamping system to solve at least one of the above-mentioned technical defects in the prior art, making the structure of the system simpler, reducing the dependence on the technical level of the installers, and also preventing bearing damage.

[0006] The second aspect of this utility model provides a machine tool.

[0007] To achieve the objective of this utility model, a clamping system is provided, comprising:

[0008] The main shell forms an accommodating space;

[0009] The rotating main body is positioned within the accommodating space and rotates along its own axial direction.

[0010] A drive motor is connected to the rotating body;

[0011] The first bearing is sleeved on the first end of the rotating body and fixed to the inner wall of the first end of the main housing;

[0012] The second bearing is sleeved on the second end of the rotating body and fixed to the inner wall of the second end of the main housing.

[0013] Preferably, the rotating body further includes a connecting shaft, the drive motor is drivenly connected to a first end of the connecting shaft, and the second end of the connecting shaft is connected to the pull rod.

[0014] The main housing is provided with an anti-rotation positioning hole on the side near the machine tool spindle.

[0015] Preferably, it further includes a first water-stop ring, which is fixed inside the main housing and sleeved on the connecting shaft, with the inner surface of the first water-stop ring and the outer cylindrical surface of the connecting shaft sealingly engaging.

[0016] Preferably, the connecting shaft has a connecting hole in the axial direction, and the pull rod is connected to the connecting shaft through the connecting hole.

[0017] The clamping system also includes a second water-stop ring, which is fixed inside the connecting hole, and the inner surface of the second water-stop ring is in a sealing fit with the outer cylindrical surface of the pull rod.

[0018] Preferably, the machine tool spindle has an inner hole along the axial direction, and the tie rod is slidably connected to the inner hole.

[0019] The clamping system also includes a third water-stop ring, which is sleeved on the pull rod, and the outer surface of the third water-stop ring is sealed to the inner hole.

[0020] Preferably, the machine tool spindle is further provided with a mounting flange.

[0021] The clamping system is fixed to the machine tool spindle by the mounting flange. The mounting flange is provided with a plurality of water guide grooves on the side facing the clamping system, and each water guide groove is circumferentially distributed along the radial direction of the mounting flange.

[0022] Preferably, the rotating body further includes a lead screw and nut, which is connected between the drive motor and the connecting shaft, and is adapted to convert the rotational motion of the drive motor into the axial motion of the connecting shaft.

[0023] The clamping system also includes a magnetic ring disposed on the lead screw nut.

[0024] Preferably, the device also includes multiple sensors disposed on the main housing, which are adapted to sense the movement position of the magnetic ring.

[0025] Preferably, it also includes a wire storage cover plate, which is disposed on the main housing and is suitable for storing the connection wire of the sensor.

[0026] The second aspect of this utility model provides a machine tool, including the above-mentioned clamping system and machine tool body.

[0027] The clamping system is located on the machine tool body.

[0028] The beneficial effects of this utility model are as follows: The clamping system provided by this utility model, by rotating the main body along its own axial direction and arranging it in the accommodating space of the main housing, and by setting a first bearing and a second bearing between the rotating body and the main housing to cooperate and support the main housing, allows the main housing and the rotating body to be connected as a whole and to rotate relative to each other. This ensures that the various structural components of the clamping system do not affect each other during normal clamping operations, simplifies the structure of the clamping system, reduces the dependence on the technical level of the installers, and lowers the maintenance difficulty; moreover, since the first bearing and the second bearing are set between the rotating body and the main housing, the bearings can also be prevented from being damaged under tensile force.

[0029] The machine tool provided by this utility model, by including the aforementioned clamping system, inevitably possesses all the advantages of that system. Specifically, it reduces reliance on the technical skills of installation personnel and lowers maintenance difficulty; furthermore, since the first and second bearings are positioned between the rotating body and the main housing, it also prevents the bearings from being damaged under tensile forces. Attached Figure Description

[0030] The above and other objects, features, and advantages of this utility model will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this application.

[0031] Figure 1 A schematic diagram of the overall structure of the clamping system provided in this embodiment of the utility model;

[0032] Figure 2 A schematic diagram illustrating the cooperation between the clamping system provided in this embodiment of the utility model and the machine tool spindle and tie rod;

[0033] Figure 3 A three-dimensional schematic diagram of the clamping system provided in an embodiment of this utility model.

[0034] In the picture:

[0035] 1. Machine tool spindle; 11. Inner bore; 2. Tie rod;

[0036] 100. Main housing; 110. Accommodation space; 120. Anti-rotation positioning hole;

[0037] 200. Rotating body; 210. Connecting shaft; 211. Connecting hole; 220. First water-stop ring; 230. Second water-stop ring; 240. Third water-stop ring;

[0038] 300. Drive motor;

[0039] 400. First bearing;

[0040] 500, Second Bearing;

[0041] 600. Mounting flange; 610. Water guide channel;

[0042] 700. Magnetic ring; 710. Sensor;

[0043] 800. Storage cable cover. Detailed Implementation

[0044] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0045] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0047] The following is combined with Figures 1 to 3 The embodiments of this utility model will be described below. It should be understood that the following description is merely an illustrative embodiment of this utility model and does not constitute any limitation on this utility model.

[0048] Combination Figures 1 to 3 This utility model provides a clamping system, which is installed on a machine tool spindle 1. A pull rod 2 is provided on the machine tool spindle 1 and is fitted inside the machine tool spindle 1. The output end of the pull rod 2 can be connected to a relevant tooling. The clamping system includes a main housing 100, a rotating body 200, a drive motor 300, a first bearing 400, and a second bearing 500.

[0049] The main housing 100 has a accommodating space 110. The main housing 100 can be fitted over the rotating body 200, which can serve as a defense and also provide support for the installation of other components in the clamping system (e.g., support for the drive motor 300, support for the electromagnetic clutch or electromagnetic brake).

[0050] The rotating body 200 is rotatably disposed in the accommodating space 110 along its own axial direction.

[0051] The drive motor 300 is connected to the rotating body 200 and can drive some components inside the rotating body 200 to slide along the axial direction to achieve the clamping function.

[0052] The first bearing 400 is sleeved on the first end of the rotating body 200 and fixed to the inner wall of the first end of the main housing 100. That is, the first bearing 400 is installed between the main housing 100 and the rotating body 200, which can connect the main housing 100 and the rotating body 200 into a whole and allow them to rotate relative to each other.

[0053] The second bearing 500 is sleeved on the second end of the rotating body 200 and fixed to the inner wall of the second end of the main housing 100. That is, the second bearing 500 is installed between the main housing 100 and the rotating body 200. The second bearing 500 can be installed near the machine tool spindle 1, so that the main housing 100 and the rotating body 200 can be connected as a whole and can rotate relative to each other. The second bearing 500 and the first bearing 400 cooperate with each other to support the main housing 100.

[0054] It is understood that the clamping system provided by the embodiments of this utility model, by rotating the rotating body 200 along its own axial direction and rotatably arranging it within the accommodating space 110 of the main housing 100, and by providing a first bearing 400 and a second bearing 500 between the rotating body 200 and the main housing 100 to cooperate in supporting the main housing 100, allows the main housing 100 and the rotating body 200 to be connected as a single unit and to rotate relative to each other. This ensures that during normal clamping operations, the structural components do not interfere with each other, simplifies the structure of the clamping system, reduces reliance on the technical level of the installers, and lowers the maintenance difficulty. Moreover, since the first bearing 400 and the second bearing 500 are located between the rotating body 200 and the main housing 100, they can also prevent the bearings from being damaged under tensile force.

[0055] Specifically, in some embodiments of this utility model, the rotating body 200 further includes a connecting shaft 210, the drive motor 300 is drivenly connected to the first end of the connecting shaft 210, and the second end of the connecting shaft 210 is connected to the pull rod 2. When the drive motor 300 outputs rotational drive, the connecting shaft 210 can slide along its own axial direction, and the connecting shaft 210 can be connected to the pull rod 2 to achieve clamping of the workpiece.

[0056] The main housing 100 is provided with an anti-rotation positioning hole 120 on the side near the machine tool spindle 1. The anti-rotation positioning hole 120 is located at the tail end of the main housing 100 near the machine tool spindle 1, and can be bolted to the machine tool bed or the housing of the machine tool spindle 1. When the machine tool is machining a workpiece, the rotating body 200 will rotate along with the rotation of the machine tool spindle 1. At this time, under the mutual cooperation of the first bearing 400 and the second bearing 500, the main housing 100 can be prevented from passively rotating with the rotating body 200, thus ensuring the safe operation of the clamping action of the clamping system.

[0057] Furthermore, combined Figures 1 to 3 To prevent the clamping system components from rusting (for example, during workpiece machining, cutting fluid may enter the clamping system, causing internal parts to rust), in some embodiments of this invention, the clamping system further includes a first water-stop ring 220. The first water-stop ring 220 is fixed inside the main housing 100 and sleeved on the connecting shaft 210. The inner surface of the first water-stop ring 220 and the outer cylindrical surface of the connecting shaft 210 are mutually sealingly fitted, so that when the connecting shaft 210 is driven to slide axially, the first water-stop ring 220 can scrape off surface water, preventing it from entering the main housing 100 and thus preventing other parts from rusting.

[0058] In addition, combined Figures 1 to 3 In some embodiments of this utility model, the clamping system further includes a second water-stop ring 230. In this embodiment, the connecting shaft 210 is provided with a connecting hole 211 along the axial direction, and the pull rod 2 is connected to the connecting shaft 210 through the connecting hole 211.

[0059] The second water-stop ring 230 is fixed inside the connecting hole 211. The inner surface of the second water-stop ring 230 and the outer cylindrical surface of the pull rod 2 are mutually sealed to prevent water from entering the connection between the connecting shaft 210 and the pull rod 2 (e.g., the connecting thread) and causing rust.

[0060] Of course, combined Figures 1 to 3 In some embodiments of this utility model, the clamping system further includes a third water-stop ring 240, the machine tool spindle 1 is provided with an inner hole 11 along the axial direction, and the pull rod 2 is slidably connected to the inner hole 11.

[0061] The third water-stop ring 240 is sleeved on the tie rod 2. The outer surface of the third water-stop ring 240 and the inner hole 11 are mutually sealed and fitted. That is to say, the outer surface of the third water-stop ring 240 and the inner wall of the inner hole 11 can slide relative to each other and can prevent water from entering the inner hole 11 when the machine tool is processing the workpiece, thereby preventing rust.

[0062] Combination Figures 1 to 3 In some embodiments of this utility model, the machine tool spindle 1 is also provided with a mounting flange 600, which can be fixed to the tail end of the machine tool spindle 1.

[0063] The clamping system can be fixed to the machine tool spindle 1 via a mounting flange 600. Multiple water guide grooves 610 are provided on the mounting flange 600 facing the clamping system, with each groove 610 circumferentially distributed along the radial direction of the mounting flange 600. For example, the water guide grooves 610 are arranged radially in a circumferential direction on the end face of the mounting flange 600, which can drain water, cutting fluid, or oil to the outside, preventing water accumulation on the machine tool spindle 1 and thus avoiding rusting of the components in the clamping system.

[0064] Combination Figures 1 to 3 In one specific embodiment of this utility model, the rotating body 200 further includes a lead screw nut, which is connected between the drive motor 300 and the connecting shaft 210. The lead screw nut can convert the rotational motion of the drive motor 300 into the axial motion of the connecting shaft 210, that is, the connecting shaft 210 can slide in the axial direction under the rotational drive of the drive motor 300.

[0065] The clamping system also includes a magnetic ring 700, which is mounted on the lead screw nut. When the clamping system is running, the magnetic ring 700 moves with the lead screw nut. The movement distance of the magnetic ring 700 directly reflects the axial movement distance of the pull rod 2, i.e., the clamping or releasing state of the workpiece. This improves the clamping and releasing accuracy and service life of the clamping system, while also ensuring precise and controllable clamping stroke position.

[0066] Furthermore, in some embodiments of this utility model, the clamping system further includes multiple sensors 710. The sensors 710 are disposed on the main housing 100 and can sense the movement position of the magnetic ring 700 and feed back relevant position signals to the control center of the clamping system. The control center identifies the current clamping position based on the position signals given by different sensors 710, thereby improving the intelligence and accuracy of the clamping system.

[0067] For example, the relative position of the sensor 710 and the magnetic ring 700 controls the starting position, maximum stroke position, and the clamping position applicable to the current workpiece of the clamping system. When the starting position sensor 710 senses the signal from the magnetic ring 700, the drive motor 300 of the clamping system stops rotating and defaults to the zero position; when the maximum stroke position sensor 710 senses the signal from the magnetic ring 700, the drive motor 300 of the clamping system stops rotating and defaults to the maximum stroke position to avoid collisions or overtravel dislodgement of the clamping system; when the workpiece applicable position sensor 710 senses the signal from the magnetic ring 700, the drive motor 300 of the clamping system stops rotating and maintains torque to ensure that the workpiece is clamped in place.

[0068] Combination Figures 1 to 3In some specific embodiments of this utility model, the clamping system further includes a wire storage cover plate 800, which is disposed on the main housing 100 and can store the connecting wire of the sensor 710.

[0069] When the position of the sensor 710 is adjusted according to different workpieces being processed, the wire of the sensor 710 will be partially bent or folded. At this time, the bent wire can be stored in the wire storage cover 800, which is both aesthetically pleasing and prevents the wire of the sensor 710 from being torn or scratched.

[0070] Combination Figures 1 to 3 An embodiment of this utility model also provides a machine tool, which includes the above-described clamping system and machine tool body.

[0071] The clamping system is located on the machine tool body. The machine tool also includes a drawbar 2 and a machine tool spindle 1. The drawbar 2 passes through the machine tool spindle 1, and the clamping system is connected to the drawbar 2.

[0072] It is understood that the machine tool provided by the embodiments of this utility model, due to including the above-mentioned clamping system, necessarily possesses all the advantages of that system. That is, the machine tool can also reduce the dependence on the technical level of the installation personnel and reduce the difficulty of maintenance; moreover, since the first bearing 400 and the second bearing 500 are located between the rotating body 200 and the main housing 100, the bearings can also be prevented from being damaged under tensile force.

[0073] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In the description of this specification, the use of terms such as "preferred embodiment," "another embodiment," "some embodiments," "other embodiments," or "specific example," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A clamping system provided in a machine tool spindle provided with a drawbar, characterized in that, The clamping system comprises: a main housing formed with a receiving space; a rotating body rotatably arranged in the receiving space along an axial direction of the rotating body; a driving motor connected with the rotating body; a first bearing sleeved on a first end of the rotating body and fixed in an inner wall of a first end of the main housing; a second bearing sleeved on a second end of the rotating body and fixed in an inner wall of a second end of the main housing.

2. The clamping system of claim 1, wherein, The rotating body further comprises a connecting shaft, the driving motor is drivingly connected with a first end of the connecting shaft, and a second end of the connecting shaft is connected with the pull rod. The main housing is provided with an anti-rotation positioning hole near the main shaft of the machine tool.

3. The clamping system of claim 2, wherein, The clamping system further comprises a first water stop ring, the first water stop ring is fixed in the main housing, the first water stop ring is sleeved on the connecting shaft, and an inner surface of the first water stop ring is sealingly matched with an outer cylindrical surface of the connecting shaft.

4. The clamping system of claim 2, wherein, The connecting shaft is provided with a connecting hole in the axial direction, and the pull rod is connected with the connecting shaft through the connecting hole. The clamping system further comprises a second water stop ring, the second water stop ring is fixed in the connecting hole, and an inner surface of the second water stop ring is sealingly matched with an outer cylindrical surface of the pull rod.

5. The clamping system of claim 2, wherein, The main shaft of the machine tool is provided with an inner hole in the axial direction, and the pull rod is slidingly connected with the inner hole. The clamping system further comprises a third water stop ring, the third water stop ring is sleeved on the pull rod, and an outer surface of the third water stop ring is sealingly matched with the inner hole.

6. The clamping system of claim 2, wherein, The main shaft of the machine tool is further provided with a mounting flange. The clamping system is fixed to the main shaft of the machine tool through the mounting flange, and the mounting flange is provided with a plurality of water guide grooves on a side facing the clamping system, and each water guide groove is circumferentially distributed along a radial direction of the mounting flange.

7. The clamping system of claim 2, wherein, The rotating body further comprises a screw nut connected between the driving motor and the connecting shaft, and adapted to convert the rotary motion of the driving motor into the axial motion of the connecting shaft. The clamping system further comprises a magnetic ring arranged on the screw nut.

8. The clamping system of claim 7, wherein, The clamping system further comprises a plurality of inductors arranged on the main housing and adapted to sense the motion position of the magnetic ring.

9. The clamping system of claim 8, wherein, The clamping system further comprises a wire storage cover plate arranged on the main housing and adapted to accommodate the connecting wires of the inductors.

10. A machine tool, characterized by The clamping system comprises the clamping system and a machine tool body, The clamping system is arranged on the machine tool body.

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