Locking mechanism for hard rail tailstock expansion sleeve

Abstract

The utility model provides a hard rail tailstock expansion sleeve locking mechanism, which relates to the field of hard rail tailstocks and comprises a tailstock body, an inner cavity of the tailstock body is movably connected with a tailstock sleeve, and an expansion sleeve is arranged at the front end of the surface of the tailstock sleeve. The front end cover of the tightening sleeve is connected with the tailstock sleeve, the deformation quantity of the expansion sleeve can be reserved, the piston pushes the tailstock sleeve to move forwards to compress the expansion sleeve, the expansion force generated in the process that the expansion sleeve is compressed by the tailstock sleeve can gradually lock the front end of the tailstock sleeve, the tailstock sleeve is in close contact with a tip, and the tailstock sleeve can be tightly clamped with the tip. Meanwhile, through the pretightening force generated by the expansion sleeve in the locking process, the overall rigidity of the tailstock insert cylinder, the tailstock body and the tailstock insert cylinder is improved, and the fit clearance among the tailstock insert cylinder, the tailstock body and the tailstock insert cylinder is eliminated, so that the vibration and shaking in the machining process are reduced, and the machining precision is improved. And the use stability is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the hard rail tailstock field, concretely is a kind of hard rail tailstock expansion sleeve locking mechanism. BACKGROUND

[0002] In modern mechanical manufacturing industry, machine tool as core processing equipment, its precision and stability are directly related to the machining quality and production efficiency of workpiece, machine tool tailstock system as the important component of machine tool, undertake the task of accurate clamping and positioning to workpiece, wherein the position and stability of the key component that top is directly contacted with workpiece are crucial to the whole machining process.

[0003] Traditional machine tool tailstock system usually adopts a kind of clamping mechanism that sleeve is moved forward by piston, and the working principle of this mechanism is that, by the thrust of piston, sleeve moves forward in tailstock, in this process, the front end of sleeve is extruded by tailstock steel bushing, so as to realize the clamping of top, and this clamping mode relies on the interference fit between tailstock steel bushing, sleeve and tailstock, to ensure the firmness and stability of clamping;However, since the fit requirement between tailstock steel bushing, sleeve and tailstock is extremely high, any machining error or size deviation of one side can lead to the generation of fit gap, and these gaps can be accumulated and enlarged during the operation of machine tool, eventually leading to the deviation of top from its proper center position, so as to reduce the machining precision of machine tool.

[0004] Therefore, the utility model provides a kind of hard rail tailstock expansion sleeve locking mechanism to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0006] A kind of hard rail tailstock expansion sleeve locking mechanism, including tailstock body, the inner cavity of tailstock body is movably connected with tailstock sleeve, and the front end of tailstock sleeve surface is provided with expansion sleeve, the rear end of tailstock sleeve is provided with piston, the rear end of tailstock body is connected with tailstock bushing, and the end, away from tailstock body, of tailstock bushing is connected with distribution body, the inner cavity of tailstock sleeve is movably connected with top, the front end of piston surface, and located in the end of tailstock body is provided with sleeve front end cover.

[0007] Further, in the utility model, the rear end of piston surface is connected with flange, and the inner wall of flange is connected with tailstock bushing.

[0008] Further, in the utility model, the inner wall of sleeve front end cover is connected with O ring, and the inner wall of O ring is in contact with the surface of piston.

[0009] Furthermore, in this invention, a washer ring is provided at the front end of the piston surface and on one side of the expansion sleeve, and one side of the washer ring can contact the expansion sleeve.

[0010] Furthermore, in this utility model, screws are provided at the front end of the sleeve front cover and the rear end of the distribution body, and nail grooves are provided at the front end of the tailstock body and the rear end of the tailstock insert. One end of the screw extends into the inner cavity of the nail groove and is threadedly connected to the inner cavity of the nail groove.

[0011] Beneficial effects: This utility model has the following beneficial effects:

[0012] This invention preserves the deformation of the expansion sleeve by pre-tightening the connection between the front end cap of the sleeve and the tail sleeve. The piston pushes the tail sleeve forward to compress the expansion sleeve. The expansion force generated during this compression gradually locks the front end of the tail sleeve, ensuring close contact between the tail sleeve and the tip, thus locking the tip and ensuring it is centered on the workpiece. This improves subsequent machining accuracy. Simultaneously, the pre-tightening force generated during locking increases the overall rigidity of the tail sleeve insert, tail body, and tail sleeve, eliminating clearances between them and reducing vibration and shaking during machining, further enhancing stability during use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0014] Figure 2 This is a utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0015] In the picture:

[0016] 1. Tailstock body; 2. Tailstock sleeve; 3. Expansion sleeve; 4. Piston; 5. Tailstock insert; 6. Distributor; 7. Center; 8. Flange; 9. Washer ring; 10. O-ring. Detailed Implementation

[0017] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0018] Example 1

[0019] like Figures 1-2 As shown, this is the first embodiment of the present invention. This embodiment provides a locking mechanism for a rigid rail tailstock expansion sleeve, including a tailstock body 1. A tailstock sleeve 2 is movably connected to the inner cavity of the tailstock body 1 to provide the necessary movement space for subsequent locking actions. An expansion sleeve 3 is provided at the front end of the surface of the tailstock sleeve 2. The deformation of the expansion sleeve 3 locks the tip 7 inside the tailstock sleeve 2. A piston 4 is provided at the rear end of the tailstock sleeve 2 to drive the tailstock sleeve 2 to move. A tailstock insert 5 is connected to the rear end of the tailstock body 1. A distribution body 6 is connected to the end of the tailstock insert 5 away from the tailstock body 1. The tip 7 is movably connected to the inner cavity of the tailstock sleeve 2. A sleeve front end cap 11 is provided at the front end of the surface of the piston 4 and at one end of the tailstock body 1.

[0020] like Figures 1-2 As shown, by tightening the connection between the front end cap 11 of the sleeve and the tail sleeve 2, the deformation of the expansion sleeve 3 can be preserved. The piston 4 pushes the tail sleeve 2 forward to compress the expansion sleeve 3. The expansion force generated by the expansion sleeve 3 during the compression process by the tail sleeve 2 will gradually lock the front end of the tail sleeve 2, so that the tail sleeve 2 is in close contact with the tip 7, thereby locking the tip 7 and ensuring that the tip 7 is in the center of the workpiece, improving the subsequent machining accuracy. At the same time, the pre-tightening force generated by the expansion sleeve 3 during the locking process increases the overall rigidity of the tail insert 5, the tail body 1 and the tail insert 5, and eliminates the fit clearance between the three, thereby reducing vibration and shaking during the machining process and further improving the stability during use.

[0021] Example 2

[0022] Reference Figure 1 and 2 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0023] In this embodiment, a flange 8 is connected to the rear end of the piston 4 surface, and the flange 8 is connected to the inner wall of the tailstock insert 5.

[0024] An O-ring 10 is connected to the inner wall of the sleeve front end cover 11, and the inner wall of the O-ring 10 is in contact with the surface of the piston 4.

[0025] like Figure 1 and 2 As shown, the flange 8 facilitates the connection between the piston 4 and the tailstock insert 5, thereby facilitating the installation of the piston 4. The O-ring 10 contacts the surface of the piston 4, ensuring the sealing of the connection between the sleeve front cover 11 and the O-ring 10 and preventing gaps from forming between them.

[0026] Example 3

[0027] Reference Figure 1 and 2 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0028] In this embodiment, a washer 9 is provided at the front end of the piston 4 surface and on one side of the expansion sleeve 3, and one side of the washer 9 can contact the expansion sleeve 3.

[0029] Screws are provided at the front end of the sleeve front cover 11 and the rear end of the distribution body 6. Screw grooves are provided at the front end of the tailstock body 1 and the rear end of the tailstock insert 5. One end of the screw extends into the inner cavity of the screw groove and is threadedly connected to the inner cavity of the screw groove.

[0030] like Figure 1 and 2 As shown, the washer 9 contacts the expansion sleeve 3, providing additional support and cushioning to reduce the direct pressure of the expansion sleeve 3 on the tailstock sleeve 2 and help to disperse and evenly distribute the locking force. The sleeve front cover 11 is fitted onto the surface of the piston 4 and contacts the tailstock body 1, aligning the screw with the nail groove. By rotating the screw, due to the threaded connection between the screw and the nail groove, the screw gradually enters the inner cavity of the nail groove during rotation, thus connecting the tailstock body 1, the tailstock sleeve 2, and the sleeve front cover 11. The tightness of the connection between the tailstock body 1, the tailstock sleeve 2, and the sleeve front cover 11 can be adjusted according to the depth of the screw entering the nail groove. The distributor 6 contacts the tailstock insert 5, aligning the nail groove with the screw. By rotating the screw, it gradually enters the inner cavity of the nail groove, thus achieving the installation connection of the tailstock insert 5 and the distributor 6.

[0031] In use, first install the tailstock insert 5 into the tailstock body 1, then install the piston 4, flange 8, and distributor 6 in sequence to ensure smooth movement later. Insert the tailstock sleeve 2 into the tailstock body 1, ensuring a good fit with the tailstock insert 5. Then install the washer 9 and the expansion sleeve 3 at the front end of the tailstock sleeve 2. Finally, connect the sleeve front end cap 11 to the tailstock sleeve 2 and place the tip 7 inside the tailstock sleeve 2. This completes the installation. When positioning the tip 7 is required, first tighten the sleeve front end cap 11 in advance to retain the deformation of the expansion sleeve 3. Under the action of the built-in hydraulic cylinder, the thrust of the hydraulic cylinder is transmitted to the tailstock sleeve 2 through the piston 4, causing the tailstock sleeve 2 to compress the expansion sleeve 3 forward. The expansion sleeve 3 is compressed by the tailstock sleeve. During the compression of the cylinder 2, the expansion sleeve 3 compresses the mating washer 9 to generate a radial expansion force. This expansion force acts evenly on the front end of the tailstock sleeve 2. When the expansion sleeve 3 is compressed to a certain extent, the expansion force it generates is sufficient to lock the front end of the tailstock sleeve 2, thereby locking the center point 7 and ensuring that the center point 7 is in the center of the workpiece. This effectively improves the machining accuracy in the later stages. At the same time, the preload generated by the expansion sleeve 3 during the locking process increases the overall rigidity of the tailstock insert 5, the tailstock body 1, and the tailstock insert 5, and eliminates the fit clearance between the three. This reduces vibration and shaking during the machining process in the later stages, further improving the stability during use and preventing the formation of gaps that could cause the center point 7 to deviate from the center, thus affecting the machining accuracy of the machine tool.

[0032] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0033] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A locking mechanism for a rigid rail tailstock expansion sleeve, comprising a tailstock body (1), characterized in that: The inner cavity of the tailstock body (1) is movably connected to the tailstock sleeve (2), and the front end of the surface of the tailstock sleeve (2) is provided with an expansion sleeve (3). The rear end of the tailstock sleeve (2) is provided with a piston (4). The rear end of the tailstock body (1) is connected with a tailstock insert (5), and the end of the tailstock insert (5) away from the tailstock body (1) is connected with a distributor (6). The inner cavity of the tailstock sleeve (2) is movably connected with a tip (7). The front end of the surface of the piston (4) and the end of the tailstock body (1) are provided with a sleeve front end cap (11).

2. The locking mechanism for the expansion sleeve of the hard rail tailstock as described in claim 1, characterized in that: The rear end of the piston (4) is connected to a flange (8), and the flange (8) is connected to the inner wall of the tailstock insert (5).

3. The locking mechanism for the hard rail tailstock expansion sleeve as described in claim 1, characterized in that: The inner wall of the sleeve front end cover (11) is connected to an O-ring (10), and the inner wall of the O-ring (10) is in contact with the surface of the piston (4).

4. The locking mechanism for the expansion sleeve of the hard rail tailstock as described in claim 1, characterized in that: A washer (9) is provided at the front end of the piston (4) and on one side of the expansion sleeve (3), and one side of the washer (9) can contact the expansion sleeve (3).

5. The locking mechanism for the expansion sleeve of the hard rail tailstock as described in claim 1, characterized in that: The front end of the sleeve front cover (11) and the rear end of the distribution body (6) are both provided with screws. The front end of the tailstock body (1) and the rear end of the tailstock insert (5) are both provided with nail grooves. One end of the screw extends into the inner cavity of the nail groove and is threadedly connected to the inner cavity of the nail groove.

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