Quick and automatic clamping device for machine tool chuck

Abstract

The utility model discloses a quick and automatic clamping device for a machine tool chuck, and mainly relates to the field of machine tool chucks. Comprising a chuck and a main shaft, an end tooth coupling is arranged on the back side of the chuck, a U-shaped tensioning claw is arranged on the side, away from the chuck, of the end tooth coupling, a connecting disc is arranged at the bottom of the main shaft, a transmission hole penetrating through the main shaft and the connecting disc is formed in the main shaft, and a transmission rod is slidably arranged in the transmission hole in an inserted mode; a driving mechanism is arranged at the top of the main shaft, an elastic sleeve capable of being connected with the transmission rod in an inserted mode is arranged in the tensioning claw, clamping rings are arranged on the outer walls of the two ends of the elastic sleeve, a clamping groove is formed in the inner hole wall of the connecting disc, and the clamping rings can be connected with the clamping groove and a groove in the tensioning claw in a clamped mode. The chuck has the advantages that the chuck and the main shaft are assembled and disassembled through the lifting transmission rod, the time needed for replacing the chuck can be shortened, convenience is improved for workers, and therefore the productivity is improved.

Description

Technical Field

[0001] The utility model relates to the field of machine tool chucks, in particular to a fast automatic clamping device for machine tool chucks. Background Art

[0002] Generally speaking, a chuck is mounted on a spindle to fix a workpiece on a machine tool. The prior art for mounting a chuck is as follows:

[0003] First, the jaws are connected to one side of the chuck to clamp and release the workpiece, and a plurality of through holes are formed from one side of the chuck to the other side. In addition, threaded holes corresponding to the through holes are processed at the end of the spindle or mandrel, the through holes are aligned with the threaded holes, and then bolts are tightened on each through hole and the threaded hole to fix the spindle.

[0004] However, as mentioned above, when the chuck is assembled, disassembled, and reconnected to the spindle, the work of tightening and loosening the bolts to each through hole and threaded hole is very cumbersome, which not only consumes a lot of working time, but also reduces the processing volume. When the chuck must be fixed on the vertical spindle or the chuck is a heavy object, there is a problem that the chuck is dropped due to the operator's mistake, which will cause a safety accident. And because the chuck is heavy, at least two people are required for each replacement, resulting in an increase in labor costs, inconvenient operation, and affecting production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a machine tool chuck fast automatic clamping device, which enables the two ends of the elastic sleeve to be respectively engaged with the clamping groove and the internal groove by descending the transmission rod, and fixes the tensioning claws with the connecting disk, thereby fixing the chuck on the main shaft, and realizing the loading and unloading of the chuck and the main shaft by lifting and lowering the transmission rod, which can shorten the time required for replacing the chuck, improve the convenience of workers, and thus improve productivity.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A quick automatic clamping device for a machine tool chuck comprises a chuck and a spindle, an end tooth coupling is provided on the back side of the chuck, a concave-shaped tensioning claw is provided on the side of the end tooth coupling away from the chuck, a connecting disk is provided at the bottom of the spindle, a transmission hole penetrating the spindle and the connecting disk is provided in the spindle, a transfer rod is inserted and slidably provided in the transmission hole, a driving mechanism for driving the transfer rod to move is provided at the top of the spindle, an elastic sleeve that can be plugged into the transfer rod is provided in the tensioning claw, retaining rings are provided on the outer walls at both ends of the elastic sleeve, a clamping groove is provided on the inner hole wall of the connecting disk, and the retaining rings at both ends of the elastic sleeve can be clamped with the clamping groove and the inner groove of the tensioning claw respectively.

[0008] Furthermore, the driving mechanism is a hydraulic cylinder.

[0009] Furthermore, one end of the transmission rod that is plugged into the elastic sleeve is tapered.

[0010] Furthermore, the elastic sleeve is an inverted cone structure, including an elastic ring at the bottom, a plurality of elastic sheets arranged in a circumferential array on the elastic ring, a clamping ring is arranged on the outside of the elastic ring, and the clamping strips on the outside of the top of each elastic sheet can form a clamping ring.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] This patent uses the connection between the transfer rod and the elastic sleeve to respectively connect the clamping strips at both ends with the clamping slot and the internal grooves of the tensioning claws, thereby achieving a firm assembly of the tensioning claws and the connecting disk, so that the chuck can be quickly and easily installed on the main shaft. When the chuck is separated, the chuck can be automatically removed by simply removing the transfer rod from the elastic sleeve, making the replacement and fixation of the chuck more convenient and labor-saving, which not only improves work productivity, but also ensures safe work and ensures high-quality work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a main structural schematic diagram of the utility model.

[0014] Attached Figure 2 It is a main structural sectional view of the utility model.

[0015] Attached Figure 3 It is the attachment of the utility model Figure 2 Enlarged view of the structure of part A in the middle.

[0016] Numbers shown in the accompanying drawings:

[0017] 1. Chuck; 2. Main shaft; 3. End gear coupling; 4. Tensioning claw; 5. Connecting plate; 6. Transmission hole; 7. Transmission rod; 8. Elastic sleeve; 9. Snap ring; 10. Slot; 11. Hydraulic cylinder. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0019] The utility model discloses a machine tool chuck fast automatic clamping device, the main structure comprises a chuck 1, a spindle 2, the spindle 2 is driven to rotate by a pulley and a motor, the back side of the chuck 1 is provided with an end tooth coupling 3, the side of the end tooth coupling 3 away from the chuck 1 is provided with a concave-shaped tensioning claw 4, the cross-sectional groove of the tensioning claw 4 is in an inverted T shape, the bottom of the spindle 2 is provided with a connecting disk 5, the spindle 2 is provided with a transmission hole 6 that passes through the spindle 2 and the connecting disk 5, the transmission hole 6 is provided with a transmission rod 7 that is inserted and slidably provided, the top of the spindle 2 is provided with a driving mechanism for driving the transmission rod 7 to move in the transmission hole 6, the tensioning claw 4 is provided with an elastic sleeve 8 that can be inserted with the transmission rod 7, the elastic sleeve 8 can be elastically deformed in the radial direction, the outer walls of the two ends of the elastic sleeve 8 are provided with snap rings 9, the inner hole wall of the connecting disk 5 is provided with a clamping groove 10, after the elastic deformation of the elastic sleeve 8, the clamping rings 9 at both ends can be respectively clamped with the clamping groove 10 and the inner groove of the tensioning claw 4,

[0020] When installing the chuck 1, align the back side of the chuck 1 with the end of the main shaft 2, insert the elastic sleeve 8 into the end of the transmission hole 6, and then drive the transmission rod 7 to move through the driving mechanism to connect the transmission rod 7 with the elastic sleeve 8, and stretch the elastic sleeve 8 outward to deform it, so that the snap rings 9 at both ends of the elastic sleeve 8 are respectively engaged with the groove 10 and the inner groove of the tensioning claw 4 to prevent the connection disk 5 from separating from the end tooth coupling 3, and complete the installation of the chuck 1; when disassembling, only need to drive the transmission rod 7 to be pulled out of the elastic sleeve 8 to achieve the separation of the connection disk 5 and the end tooth coupling 3.

[0021] Preferably, the driving mechanism is a hydraulic cylinder 11.

[0022] Preferably, one end of the transmission rod 7 that is plugged into the elastic sleeve 8 is tapered, which can facilitate the plugging of the transmission rod 7 and the elastic sleeve 8.

[0023] Preferably, the elastic sleeve 8 is an inverted cone structure, including an elastic ring at the bottom, a plurality of elastic sheets in a circular array on the elastic ring, a clamping ring 9 is provided on the outside of the elastic ring, and the clamping strips on the outside of the top end of each elastic sheet can form a clamping ring 9, thereby realizing the elastic deformation function of the elastic sleeve 8.

[0024] This patent can not only quickly and easily install the chuck 1 on the spindle 2, but also conveniently remove the chuck 1, making the replacement and fixation of the chuck 1 more convenient and labor-saving, which not only improves work productivity, but also ensures safe work and ensures high-quality work.

Claims

1. A machine tool chuck rapid automatic clamping device, comprising a chuck (1) and a spindle (2), characterized in that: The back side of the chuck (1) is provided with an end tooth coupling (3), and the side of the end tooth coupling (3) away from the chuck (1) is provided with a concave-shaped tensioning claw (4). The bottom of the main shaft (2) is provided with a connecting disk (5), and the main shaft (2) is provided with a transmission hole (6) penetrating the main shaft (2) and the connecting disk (5). A transmission rod (7) is inserted and slidably provided in the transmission hole (6). The top of the main shaft (2) is provided with a driving mechanism for driving the transmission rod (7) to move. The tensioning claw (4) is provided with an elastic sleeve (8) that can be inserted with the transmission rod (7), and the outer walls of both ends of the elastic sleeve (8) are provided with snap rings (9). The inner hole wall of the connecting disk (5) is provided with a clamping groove (10), and the clamping rings (9) at both ends of the elastic sleeve (8) can be clamped with the clamping groove (10) and the inner groove of the tensioning claw (4) respectively.

2. The machine tool chuck rapid automatic clamping device according to claim 1, characterized in that: The driving mechanism is a hydraulic cylinder (11).

3. The machine tool chuck rapid automatic clamping device according to claim 1, characterized in that: One end of the transmission rod (7) that is plugged into the elastic sleeve (8) is tapered.

4. The machine tool chuck rapid automatic clamping device according to claim 1, characterized in that: The elastic sleeve (8) is an inverted cone structure, comprising an elastic ring at the bottom, a plurality of elastic sheets arranged in a circumferential array on the elastic ring, a clamping ring (9) being arranged on the outside of the elastic ring, and a clamping strip on the outside of the top end of each elastic sheet being able to enclose a clamping ring (9).

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