Clamping and positioning device of magnetic material hole machining motorized spindle

Abstract

The utility model relates to the technical field of magnetic material machining, in particular to a clamping and positioning device of a magnetic material hole machining motorized spindle. Comprising a hollow main shaft (1), a pull tube (2) which is arranged in the main shaft (1) in a penetrating manner and is in axial sliding fit with the main shaft (1), an elastic chuck (3) which is arranged at one end of the main shaft (1), is connected with one end of the pull tube (2) and is used for clamping or loosening a workpiece (4), and a buffer mechanism which is arranged in the main shaft (1) and is used for propping against the workpiece (4) entering the elastic chuck (3). By the adoption of the clamping and positioning device, the magnetic material workpiece can be well prevented from being excessively jacked in.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic material processing, in particular to a clamping and positioning device for an electric spindle for processing a magnetic material hole. Background Art

[0002] The domestic magnetic material processing industry has been developing at an increasingly faster pace since the 1990s, and various equipment dedicated to the processing of the above materials has also been continuously improved and innovated.

[0003] When processing a magnetic material workpiece, a clamping device is required to clamp the magnetic material workpiece and then drive the magnetic material workpiece to rotate. For example, the Chinese utility model patent with publication number CN 219945935 U applied by the applicant on June 7, 2023 can clamp the magnetic material workpiece to be processed through an elastic chuck. However, when this structure pushes the magnetic material workpiece into the elastic chuck through the pushing cylinder, because there is no other positioning device inside the elastic chuck, it may cause the magnetic material workpiece to be pushed in too much, thereby resulting in poor processing accuracy of the magnetic material workpiece. Utility Model Content

[0004] The technical solution to be solved by the utility model is to provide a clamping and positioning device for an electric spindle for processing a magnetic material hole. The clamping and positioning device can well prevent the magnetic material workpiece from being pushed in too much.

[0005] The technical solution adopted by the utility model is: a clamping and positioning device for an electric spindle for processing holes in magnetic materials, comprising a hollow spindle, a draw tube penetrating the spindle and axially slidingly cooperating with the spindle, and an elastic chuck arranged at one end of the spindle and connected to one end of the draw tube for clamping or loosening a workpiece, and it also includes a buffer mechanism arranged inside the spindle for resisting the workpiece entering the elastic chuck.

[0006] Preferably, the buffer mechanism comprises a material stripping ejector rod slidably connected inside the elastic chuck and used to resist the workpiece entering the elastic chuck, and an elastic component used to provide a restoring force to the material stripping ejector rod.

[0007] Preferably, the elastic component includes a guide rod with one end connected to one end of the material return push rod, a tube pull rod with one end connected to the other end of the guide rod, a return spring sleeved on the tube pull rod, a spring positioning sleeve fixed on the tube pull rod, and a sliding sleeve arranged at the other end of the tube pull, one end of the return spring abuts against the spring positioning sleeve, and the other end of the return spring abuts against the sliding sleeve.

[0008] Preferably, the material ejector rod is threadedly connected to the guide rod.

[0009] Preferably, the guide rod is a non-rotating body, and it also includes an anti-rotation sleeve fixed in the pull tube and sleeved outside the guide rod for preventing the guide rod from rotating.

[0010] Preferably, the cross section of the guide rod is hexagonal, a through hole for the guide rod to pass through is arranged in the middle of the anti-rotation sleeve, and the cross section of the through hole is hexagonal to match the guide rod.

[0011] Preferably, the tube pull rod is provided with a through hole, the spring positioning sleeve is provided with a mounting hole, and the spring positioning sleeve is locked on the tube pull rod by a locking piece passing through the mounting hole and the through hole.

[0012] Compared with the prior art, the utility model has the following advantages: a buffer mechanism is arranged inside the spindle, so that the workpiece will be resisted by the buffer mechanism after entering the elastic chuck, so that the workpiece can only enter the ejection stroke of the ejection cylinder and will not enter the elastic chuck too much, so that the overall processing accuracy of the workpiece is higher and the consistency is higher.

[0013] A buffer mechanism is formed by combining a material ejector rod and an elastic component. When the workpiece enters a certain position in the elastic chuck, it will be supported by the material ejector rod, and then the workpiece will move against the material ejector rod. At this time, the elastic component will continue to give a reset force to the material ejector rod until the stroke of the ejection cylinder is completed. This can effectively prevent the workpiece from entering the elastic chuck too much.

[0014] By adopting the elastic component of this structure, the reset spring can well provide the reset force to the pull tube push rod, thereby well realizing the buffering function.

[0015] The ejector rod is threadedly connected to the guide rod, so that the ejector rod can be replaced according to different workpieces.

[0016] The guide rod is made into a non-rotating body, and then an anti-rotation sleeve is set, so that the guide rod cannot rotate when the ejector rod is rotated. At this time, the ejector rod can be easily removed from the guide rod.

[0017] The cross section of the ejector rod is made into a hexagon, which is convenient for processing and has a better anti-rotation effect.

[0018] This structure is used to install the spring locating sleeve, which is not only convenient to install but also can firmly fix the spring locating sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The diagram is a structural diagram of an electric spindle for machining holes in magnetic materials.

[0020] Figure 2 yes Figure 1 Cross-sectional view after removing the ejector cylinder and workpiece.

[0021] Among them, 1. spindle; 2. pulling tube; 3. elastic chuck; 4. workpiece; 5. ejector rod; 6. guide rod; 7. pulling tube ejector rod; 8. reset spring; 9. spring positioning sleeve; 10. sliding sleeve; 11. anti-rotation sleeve; 12. ejector cylinder. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Embodiment 1:

[0024] A clamping and positioning device for an electric spindle for processing holes in magnetic materials comprises an electric spindle, a drawing tube 2, an elastic chuck 3 and a buffer mechanism, wherein:

[0025] The electric spindle mainly includes a hollow spindle 1, a rotor, a stator and a housing. Since this is a product of the prior art, it is not described in detail here.

[0026] The pull tube 2 is inserted into the main shaft 1 and slidably cooperates with the main shaft 1 in the axial direction, that is, the pull tube 2 can move forward and backward in the axial direction of the main shaft 1, and its front end is connected to the elastic chuck 3, and its rear end extends out of the main shaft 1;

[0027] The elastic chuck 3 is arranged at one end of the spindle 1, and includes a head with an outer conical surface and a long groove opened along the axial direction to form a clamping jaw that can contract centripetally, and an inner hole adapted to the shape of the clamped workpiece 4 is formed in the middle of the clamping jaw, and the elastic chuck 3 is connected to one end of the draw tube 2, so that the draw tube 2 can drive the elastic chuck 3 to move axially, and the deformation of the clamping jaw makes the inner hole smaller or larger, so as to achieve the clamping and loosening of the workpiece 4. This is a relatively conventional elastic chuck 3 for machine tools in the prior art, so it is not elaborated in detail here;

[0028] The buffer mechanism includes a material ejector rod 5, a guide rod 6, a tube puller rod 7, a return spring 8, a spring positioning sleeve 9 and a sliding sleeve 10, wherein:

[0029] The material stripping push rod 5 is slidably connected in the inner hole of the elastic chuck 3 and can slide in the inner hole. The front end of the material stripping push rod 5 is used to abut against the workpiece 4. The rear end of the material stripping push rod 5 is threadedly connected to the front end of the guide rod 6. The front end of the tube pulling push rod 7 is threadedly connected to the rear end of the guide rod 6. The spring positioning sleeve 9 is fixed to the middle part of the tube pulling push rod 7 through a locking member. The sliding sleeve 10 is arranged in the rear end of the tube pulling 2. The reset spring 8 is sleeved on the tube pulling push rod 7, and one end abuts against the spring positioning sleeve 9, and the other end abuts against the sliding sleeve 10.

[0030] The working principle of this embodiment is: when the ejecting cylinder 12 pushes the workpiece 4 into the inner hole of the elastic chuck 3, the workpiece 4 will resist the ejector rod 5 and push the ejector rod 5 backwards. At this time, the ejector rod 5 will move backwards with the guide rod 6 and the tube drawing ejector rod 7. Because the sliding sleeve 10 does not move with the ejector rod 5, and the spring positioning sleeve 9 moves with the ejector rod 5, the reset spring 8 will be compressed at this time, which will give the ejector rod 5 a reset force. In this way, when the ejecting cylinder 12 has completed its stroke, the workpiece 4 will continue to be resisted by the ejector rod 5 and will not continue to move forward due to inertia. Then the tube drawing 2 can be controlled to work and the workpiece 4 can be clamped by the elastic chuck 3.

[0031] Embodiment 2:

[0032] The difference from the first embodiment is that the cross-section of the guide rod 6 in the second embodiment is a hexagon, that is, the guide rod 6 is a non-rotating body, and an anti-rotation sleeve 11 is threadedly connected to the front end of the pull tube 2, the anti-rotation sleeve 11 is sleeved on the outside of the guide rod 6, and the cross-section of the through hole on the anti-rotation sleeve 11 for the guide rod 6 to pass through is also hexagonal, so that when the material ejector rod 5 needs to be replaced, the material ejector rod 5 can be rotated, and at this time, the guide rod 6 will be circumferentially limited by the anti-rotation sleeve 11, that is, the guide rod 6 will not rotate, so that the material ejector rod 5 can be conveniently removed and replaced.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0034] For those skilled in the art, various changes and modifications will undoubtedly be obvious after reading the above description. Therefore, the attached claims should be regarded as covering all changes and modifications to the true intent and scope of the utility model. Any and all equivalent ranges and contents within the scope of the claims should be considered to still be within the intent and scope of the utility model.

Claims

1. A clamping and positioning device for an electric spindle for processing holes in magnetic materials, comprising a hollow spindle (1), a draw tube (2) inserted into the spindle (1) and axially slidingly matched with the spindle (1), and an elastic chuck (3) arranged at one end of the spindle (1) and connected to one end of the draw tube (2) for clamping or releasing a workpiece (4), characterized in that: It also comprises a buffer mechanism arranged inside the main shaft (1) for resisting against a workpiece (4) entering into the elastic chuck (3).

2. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 1, characterized in that: The buffer mechanism comprises a material ejector rod (5) slidably connected inside the elastic chuck (3) and used to resist the workpiece (4) entering the elastic chuck (3), and an elastic component used to provide a reset force for the material ejector rod (5).

3. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 2, characterized in that: The elastic component comprises a guide rod (6) having one end connected to one end of a material ejector rod (5), a tube pull rod (7) having one end connected to the other end of the guide rod (6), a return spring (8) sleeved on the tube pull rod (7), a spring positioning sleeve (9) fixed on the tube pull rod (7), and a sliding sleeve (10) arranged at the other end of the tube pull (2), one end of the return spring (8) abuts against the spring positioning sleeve (9), and the other end of the return spring (8) abuts against the sliding sleeve (10).

4. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 3 is characterized in that: The material ejector rod (5) is threadedly connected to the guide rod (6).

5. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 4, characterized in that: The guide rod (6) is a non-rotating body and further comprises an anti-rotation sleeve (11) fixed in the pull tube (2) and sleeved outside the guide rod (6) for preventing the guide rod (6) from rotating.

6. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 5, characterized in that: The cross section of the guide rod (6) is hexagonal, and a through hole for the guide rod (6) to pass through is arranged in the middle of the anti-rotation sleeve (11), and the cross section of the through hole is hexagonal and matches the guide rod (6).

7. The clamping and positioning device for a magnetic material hole machining electric spindle according to claim 3, characterized in that: The tube pull rod (7) is provided with a through hole, the spring positioning sleeve (9) is provided with a mounting hole, and the spring positioning sleeve (9) is locked on the tube pull rod (7) by a locking piece passing through the mounting hole and the through hole.

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