Unfolding type cutter driving device

Abstract

The utility model discloses an unfolding type cutter driving device which comprises a shell, a driving part and a driving part, and the shell is provided with a mounting part used for mounting the shell on a machine tool power unit box body; a rotatable pull rod mechanism is arranged in the shell; the pull rod mechanism comprises a sleeve and a telescopic rod arranged in the sleeve, the first end of the sleeve is in power connection with a main shaft of a machine tool power unit, the second end of the sleeve is connected with the unfolding type cutter, the first end of the telescopic rod is connected with a push rod of the unfolding type cutter, and a sliding groove is formed in the side wall of the sleeve. The second end of the telescopic rod is provided with a sliding block extending out of the sliding groove. A shifting fork mechanism is arranged on the outer ring of the sleeve; the shifting fork mechanism comprises a shifting fork and a sliding sleeve, the sliding sleeve is rotationally arranged on the inner ring of the shifting fork and arranged on the sleeve in a sleeving mode and can rotate along with the pull rod mechanism, and the sliding block is connected with the sliding sleeve; a feeding mechanism capable of driving the shifting fork mechanism to move in the axial direction of the pull rod mechanism is further arranged on the shell.

Description

Technical Field

[0001] The utility model relates to the field of machine tools, in particular to a driving device which is used for connecting an expandable tool with a machine tool power unit and driving the expandable tool to expand. Background Art

[0002] Expandable tools are mostly used on boring tools for inner hole processing. The push rod on the tool drives the tool bar to expand radially along the tool to change the distance between the blade and the tool rotation center, thereby realizing the processing of variable diameter inner cavities. The tool handle has various expansion methods, such as sliding expansion or swing expansion, but the components that drive the tool bar to expand the expandable tool are generally realized by pull rods. For example, the Chinese utility model patent with publication number CN 213916156 U discloses a hydraulic automatic opening reverse scraping tool for processing reverse side step holes, which is expanded by driving the tool holder (tool bar) to swing by a pull rod.

[0003] In order to realize the unfolding of the unfolded tool during the rotation process, the conventional drive device for the unfolding of the tool is arranged at the tail of the unfolded tool to control the pull rod by means of a lead screw or hydraulic control, such as a dual-purpose boring and turning power head disclosed in the Chinese utility model patent with publication number CN 217315994 U, in which the stretching mechanism is arranged at the tail of the unfolded tool, and the machine tool power unit is arranged at the side to drive the tool to rotate by a belt. This device requires a significant modification to the machine tool power unit, and is arranged in a large overall size, requiring a special machine tool for installation, and cannot be installed when applied to a traditional machine tool. Utility Model Content

[0004] In order to solve the problems that the expandable tool drive device in the prior art cannot be adapted to the traditional machine tool power unit and has large size specifications, the technical solution adopted by the utility model is:

[0005] A deployable tool drive device comprises: a shell, on which a mounting portion for mounting the shell on a machine tool power unit housing is provided; a rotatable pull rod mechanism is provided in the shell; the pull rod mechanism comprises a sleeve and a telescopic rod arranged in the sleeve, the first end of the sleeve is connected to the power of the machine tool power unit spindle and the second end is connected to the deployable tool, the first end of the telescopic rod is connected to the deployable tool push rod, a slide groove is provided on the side wall of the sleeve, and a slider extending out of the slide groove is provided on the second end of the telescopic rod; a shift fork mechanism is provided on the outer ring of the sleeve; the shift fork mechanism comprises a shift fork and a sliding sleeve, the sliding sleeve is rotatably arranged on the inner ring of the shift fork and is sleeved on the sleeve so as to rotate with the pull rod mechanism, and the slider is connected to the sliding sleeve; a feed mechanism capable of driving the shift fork mechanism to move axially along the pull rod mechanism is also provided on the shell.

[0006] Furthermore, the feeding mechanism includes a motor and a screw mechanism, the motor and the screw mechanism are connected via a transmission mechanism, and the shift fork is connected to a screw nut of the screw mechanism.

[0007] Furthermore, the transmission mechanism is a belt, a gear or a chain.

[0008] Furthermore, the feeding mechanism is a hydraulic cylinder or an electric cylinder.

[0009] Furthermore, the mounting portion is a slide rail or a flange.

[0010] Furthermore, an adapter is provided on the housing, which is connected to the main shaft of the machine tool power unit and cooperates with the sleeve to transmit the power of the main shaft of the machine tool power unit to the sleeve.

[0011] By adopting the above technical scheme, the tool is connected to the main shaft of the machine tool power unit through the pull rod mechanism, the fork mechanism that drives the pull rod mechanism to work is sleeved on the pull rod mechanism, and the feed mechanism arranged on one side of the pull rod mechanism drives the fork mechanism to move to drive the pull rod mechanism to work and realize the unfolding of the tool. Therefore, it is only necessary to install the unfolding device on the machine tool power unit box through the mounting part, and the pull rod mechanism can be adapted to the main shaft of the machine tool power unit to realize the combination of the driving device and the machine tool power unit. It is only necessary to set a structure assembled on the mounting part on the machine tool power unit box to complete the installation of the driving device, and there is no need to make major changes to the machine tool power unit. When the machine tool is performing other processing, it is only necessary to remove the driving device to install the traditional tool for processing. Moreover, since the fork mechanism and the feed mechanism are basically parallel to the pull rod mechanism, instead of being arranged axially at the tail end of the pull rod mechanism, the length of the driving device is further reduced, so that the driving device has a compact structure and occupies a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the shaft side of the expansion tool drive device connected to one end of the tool;

[0013] Figure 2 A schematic diagram of the shaft side of the expansion tool drive device connected to one end of the main shaft of the machine tool power unit;

[0014] Figure 3 It is a structural schematic diagram of the deployable tool drive device installed on the machine tool power unit and with the tool installed;

[0015] Figure 4 for Figure 3 A cross-sectional view of

[0016] Figure 5 It is a schematic diagram of the assembly of the main functional components inside the housing of the deployable tool drive device;

[0017] Figure 6It is a schematic diagram of the pull rod mechanism structure;

[0018] Figure 7 It is a cross-sectional view of the tie rod structure;

[0019] Figure 8 It is the explosion diagram of the pull rod mechanism;

[0020] Fig. 9 It is a schematic diagram of the structure of the shift fork mechanism;

[0021] Fig.10 It is a cross-sectional view of the fork mechanism;

[0022] Fig.11 It is a schematic diagram of the unfolded tool structure;

[0023] Fig.12 This is a schematic diagram of the machine tool power unit structure.

[0024] Main markings in the attached drawings:

[0025] 1. Shell;

[0026] 1-1, Installation part;

[0027] 2. Pull rod mechanism;

[0028] 2-1, sleeve;

[0029] 2-2, telescopic rod;

[0030] 2-3, chute;

[0031] 2-4, slider;

[0032] 2-5, adapter;

[0033] 3. Fork mechanism;

[0034] 3-1, shift fork;

[0035] 4. Feeding mechanism;

[0036] 4-1, Motor;

[0037] 4-2, screw mechanism;

[0038] 4-3. Transmission mechanism. DETAILED DESCRIPTION

[0039] In order to better understand the concept of the present invention, the technical solution of the present invention is further described in detail below with reference to the specific embodiments given in the accompanying drawings.

[0040] like Fig.11The expandable tool shown is provided with a push rod a, which drives the push rod a to move along the axial direction x to make the tool rod b move along the radial direction y, thereby changing the distance between the blade c installed on the tool rod b and the tool rotation center o. When processing the inner cavity, the distance between the blade c and the tool rotation center can be changed to achieve the processing of special inner holes such as stepped inner holes or variable diameter inner holes. The driving device described in the utility model is designed for this expandable tool. The driving device can be used to connect the expandable tool to the power unit of the machine tool to provide power for the tool rotation during processing, and can also drive the tool rod in the expandable tool to perform the expansion action.

[0041] like Figure 1 and Figure 2 The expandable tool drive device shown includes a shell 1, which serves as the bearing structure of the expandable tool drive device and has main functional components installed and arranged inside it: such as the pull rod mechanism 2, the fork mechanism 3 and the feed mechanism 4, which will be further described in detail later. At the same time, the shell 1 is also the main structure connecting the expandable tool drive device with the machine tool power unit.

[0042] In order to realize the installation of the expandable tool drive device on the machine tool power unit box, a mounting portion 1-1 is provided on the housing 1. In this embodiment, the mounting portion 1-1 is a guide rail groove. Therefore, in order to be able to cooperate with the mounting portion 1-1, as shown in FIG. Fig.12 As shown in the figure, the machine tool power unit box d (i.e., the spindle box) is also equipped with a guide rail e that matches the guide rail groove. Figure 3 and 4 As shown, the guide groove on the housing 1 is connected with the guide rail e on the machine tool power unit box d and pushed along the axial direction of the machine tool power unit box, and the housing 1 is fixed by means of locking bolts or wedge blocks, etc., so as to complete the connection between the housing 1 and the machine tool power unit box. Of course, in addition to the connection method given in this embodiment, the housing 1 and the machine tool power unit box can also be connected by conventional connection methods such as flanges, which will not be shown or described in detail here.

[0043] A pull rod mechanism 2 is arranged in the housing 1, and the pull rod mechanism 2 can rotate in the housing 1. When the housing 1 is installed on the machine tool power unit box, the tail end of the pull rod mechanism 2 will form a power link with the spindle f of the machine tool power unit, and when the spindle f rotates, the pull rod mechanism 2 will be driven to rotate;

[0044] like Figure 3 and Figure 4 The unfolded tool w is connected to the front end of the draw rod mechanism 2. When the draw rod mechanism 2 is driven to rotate by the main shaft f of the machine tool power unit, the unfolded tool w will be driven to rotate, thereby realizing the processing operation.

[0045] like Figure 5The main functional mechanisms installed in the housing 1 are shown, which include a fork mechanism 3 and a feed mechanism 4 in addition to the above-mentioned pull rod mechanism 2. The structures and functions of these mechanisms are further described in detail below.

[0046] Functionally, in addition to transferring the power of the machine tool power unit to the deployable tool to rotate the tool as mentioned above, the pull rod mechanism 2 can also drive the push rod a on the deployable tool to move the tool bar b in the radial direction through the telescopic rod 2-2 in the pull rod mechanism. The fork mechanism 3 drives the telescopic rod 2-2 in the pull rod mechanism 2 to move by moving axially along the pull rod mechanism 2. The feed mechanism 4 provides power for the fork mechanism 3 to move axially along the pull rod mechanism 2.

[0047] The above-mentioned pull rod mechanism 2 is as follows Figures 6 to 8 The telescopic rod 2-2 is slidably arranged in the sleeve 2-1 and can move along the axial direction of the sleeve 2-1. Figure 4 The sleeve 2-1 is assembled in the housing 1 through a bearing and can rotate. The first end 2-1a of the sleeve 2-1 is used to connect the expansion tool, and the second end 2-1b of the sleeve 2-1 is used to connect to the main shaft f of the machine tool power unit. Figure 8 In this embodiment, a flange is provided at the first end 2-1a of the sleeve 2-1 to connect the expandable tool, and an adapter 2-5 is provided at the second end 2-1b of the sleeve 2-1 to connect the spindle f. Since the tool holder structure of the spindle f is different, the adapter 2-5 can be replaced according to different tool holders to adapt to the tool holder of the spindle f. Of course, the second end 2-1b of the sleeve 2-1 can also be directly processed into a structure that is compatible with the tool holder of the spindle f and directly connected to the spindle. Of course, in addition to the connection method given in this embodiment, other methods can also be used to connect with the expandable tool and the spindle. For example, when the connection part of the expandable tool is not a flange but a tapered tool holder structure, the second end 2-1b of the sleeve 2-1 can also be processed into a tapered hole matching the tool holder to install the expandable tool. No further explanation will be given here.

[0048] In order to drive the telescopic rod 2-2 to move in the sleeve 2-1, a slide groove 2-3 is provided on the side wall of the sleeve 2-1, and a slider 2-4 is installed on the second end 2-2b of the telescopic rod 2-2. The slider 2-4 extends out of the outer wall of the sleeve 2-1 through the slide groove 2-3 and can slide along the slide groove 2-3. By driving the slider 2-4, the telescopic rod 2-2 is driven to move along the axial direction of the sleeve 2-1. Figure 4As shown, when the sleeve 2-1 rotates, it rotates together with the telescopic rod 2-2 with the cooperation of the slide groove 2-3 and the slider 2-4. Since the deployable tool housing is connected to the sleeve 2-1, the push rod a of the deployable tool is connected to the first end 2-2a of the telescopic rod 2-2. Therefore, during the process of the sleeve 2-1 driving the deployable tool to rotate, the push rod a also rotates synchronously, and the telescopic rod 2-2 and the sleeve 2-1 also rotate synchronously. Therefore, the push rod a and the telescopic rod 2-2 are relatively stationary during the rotation process, so that during the rotation process of the pull rod mechanism 2, the telescopic rod 2-2 can drive the push rod a to move to realize the tool deployment.

[0049] In order to drive the telescopic rod 2-2 to move axially, Figure 4 As shown in FIG. 1 , the outer ring of the sleeve 2-1 is provided with the fork mechanism 3, as shown in FIG. Fig. 9 and Fig.10 The shift fork mechanism 3 shown in the figure comprises a shift fork 3-1 and a sliding sleeve 3-2. The sliding sleeve 3-2 is arranged on the inner ring of the shift fork 3-1 through a bearing and can rotate freely. Figure 4 The sliding sleeve 3-2 is sleeved on the outer ring of the sleeve 2-1 and can move axially along the sleeve 2-1. The slider 2-4 arranged on the telescopic rod 2-2 extends out of the sleeve 2-1 and is connected to the sliding sleeve 3-2. When the sleeve 2-1 rotates, the sliding sleeve 3-2 is driven to rotate together with the slider 2-4 rotating synchronously with the sleeve 2-1. The shift fork 3-1 is assembled between the shift fork 3-1 and the sliding sleeve 3-2 through a bearing, so that the shift fork 3-1 is in a stationary position relative to the sleeve 2-1 and the sliding sleeve 3-2 in the circumferential direction. In the stationary state, due to the assembly relationship between the shift fork 3-1 and the sleeve 3-2, when the shift fork 3-1 moves axially along the sleeve 2-1, it can drive the sleeve 3-2 to move axially along the sleeve 2-1 together, so that under the action of the slider 2-4, the telescopic rod 2-2 is driven to move axially along the sleeve 2-1 to drive the push rod a of the deployable tool. Therefore, it can be seen that the tool can be deployed not only when the pull rod mechanism 2 is stationary, but also when the pull rod mechanism 2 rotates, the shift fork mechanism 3 can drive the tool to be deployed. Grease is applied between the sleeve 3-2 and the sleeve 2-1 to reduce the friction between the sleeve 3-2 and the sleeve 2-1. In order to fully lubricate, an oil groove 3-3 is provided on the inner ring of the sleeve 3-2, such as Fig. 9 and Fig.10 In the illustrated embodiment, the oil groove 3-3 is distributed in a spiral shape on the inner ring of the sliding sleeve 3-2.

[0050] As can be seen from the above scheme, the fork mechanism 3 needs to move axially along the pull rod mechanism 2, so Figure 4 and Figure 5The deployable prop driving mechanism shown in the figure also needs to be configured with a feed mechanism 4 for driving the fork mechanism 3 to move. The above-mentioned feed mechanism 4 in this embodiment includes a motor 4-1, a screw mechanism 4-2, and a belt 4-31 and a pulley 4-32 as a transmission mechanism 4-3. Of course, the transmission mechanism is not limited to belt transmission, and transmission methods such as gears or chains can also be used. The motor 4-1 and the screw mechanism 4-2 are connected by a belt 4-31 and a pulley 4-32. The motor 4-1 drives the screw mechanism 4-2 to work, and the fork 3-1 is connected to the screw nut 4-22 in the screw mechanism 4-2. When the screw 4-21 is driven to rotate by the motor, the screw nut 4-22 can drive the fork 3-1 to move, thereby driving the telescopic rod 2-2 to extend and retract. The motor 4-1 uses a servo motor to accurately control the moving distance of the fork 3-1, thereby controlling the deployment size of the deployable tool. Of course, in addition to the specific feeding mechanism 4 given in this embodiment, the feeding mechanism 4 also adopts a linear driving device such as a hydraulic cylinder or an electric cylinder that can accurately control the feeding amount.

Claims

1. A deployable tool drive device, characterized in that: include: Housing (1), The housing (1) is provided with a mounting portion (1-1) for mounting the housing (1) on a box body of a machine tool power unit; A rotatable pull rod mechanism (2) is arranged in the housing (1); The pull rod mechanism (2) comprises a sleeve (2-1) and a telescopic rod (2-2) arranged in the sleeve (2-1); the first end of the sleeve (2-1) is connected to the main shaft power of the machine tool power unit and the second end is connected to the deployable tool; the first end of the telescopic rod (2-2) is connected to the deployable tool push rod; a slide groove (2-3) is arranged on the side wall of the sleeve (2-1); and a slider (2-4) extending out of the slide groove (2-3) is arranged on the second end of the telescopic rod (2-2); A shift fork mechanism (3) is arranged on the outer ring of the sleeve (2-1); The shift fork mechanism (3) comprises a shift fork (3-1) and a sliding sleeve (3-2); the sliding sleeve (3-2) is rotatably arranged on the inner ring of the shift fork (3-1) and sleeved on the sleeve (2-1) so as to rotate along with the pull rod mechanism (2); the sliding block (2-4) is connected to the sliding sleeve (3-2); The housing (1) is also provided with a feeding mechanism (4) capable of driving the shift fork mechanism (3) to move axially along the pull rod mechanism (2).

2. The deployable tool drive device according to claim 1, characterized in that: The feeding mechanism (4) comprises a motor (4-1) and a screw mechanism (4-2); the motor (4-1) and the screw mechanism (4-2) are connected via a transmission mechanism (4-3); and the shift fork (3-1) is connected to a screw nut of the screw mechanism (4-2).

3. The deployable tool drive device according to claim 2, characterized in that: The transmission mechanism (4-3) is a belt, a gear or a chain.

4. The deployable tool drive device according to claim 1, characterized in that: The feeding mechanism (4) is a hydraulic cylinder or an electric cylinder.

5. The deployable tool drive device according to claim 1, characterized in that: The mounting part (1-1) is a slide rail or a flange.

6. The deployable tool drive device according to claim 1, characterized in that: The housing (1) is provided with an adapter (2-5) which is connected to the main shaft of the machine tool power unit and cooperates with the sleeve (2-1) to transmit the power of the main shaft of the machine tool power unit to the sleeve (2-1).

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