Hydraulic tailstock for numerical control machine tool

Abstract

The utility model relates to the technical field of numerical control machine tools, in particular to a hydraulic tailstock for a numerical control machine tool, which comprises a hydraulic tailstock, a base is arranged at the bottom end of the hydraulic tailstock, and adjusting mechanisms are arranged on two sides of the base. A hydraulic needle sleeve is movably arranged in the upper end of the hydraulic tailstock, an ejector pin is connected into the front end of the hydraulic needle sleeve in a sleeved mode, and a fixing mechanism is arranged between the ejector pin and the hydraulic needle sleeve. The adjusting mechanism is arranged, the rotating bolt head is used for driving the lead screw to rotate, the movable block does linear motion along the lead screw, then the positions of the installation base and the standard bolt holes in the installation base are changed, and therefore the installation position can be flexibly adjusted according to the installation requirements of different numerical control machine tools; the problem that the position of a traditional tailstock mounting hole is fixed, and adaptive mounting with a numerical control machine tool is inconvenient is solved, and the universality and mounting convenience of the hydraulic tailstock are improved.

Description

Technical Field

[0001] This utility model relates to the field of CNC machine tool technology, specifically to a hydraulic tailstock for CNC machine tools. Background Technology

[0002] Hydraulic tailstocks, also known as hydraulic tail supports, are commonly used on CNC lathes, CNC milling machines, and mill-turning composite machines. When machining shaft parts, if the part is too long, simply using a chuck to clamp the long shaft part will cause vibration, making it difficult to control the accuracy during machining. By using a hydraulic tailstock to both lift and clamp, vibration of long shaft parts during machining can be effectively prevented.

[0003] As disclosed in the patent announcement CN216370182U, a straight-through hydraulic tailstock includes a tailstock body and a hydraulic cylinder. A front axle sleeve is disposed within the inner cavity of the tailstock body, and a mandrel is disposed within the inner cavity of the tailstock body. A rear axle sleeve is fitted around the outer ring of the mandrel. A threaded post is fixedly connected to the front of the hydraulic cylinder, and a cylinder is threadedly connected to the outer ring of the threaded post. The beneficial effects of this invention using the above technical solution are: by connecting the hydraulic cylinder and the mandrel with a connecting nut, forward and backward movement is controlled, thus eliminating friction between the tailstock body and the mandrel and solving the oil leakage problem.

[0004] Although the aforementioned patent solved the oil leakage problem, the mounting hole position on the tailstock is fixed, making it inconvenient to adapt and install with CNC machine tools. Utility Model Content

[0005] The purpose of this invention is to provide a hydraulic tailstock for CNC machine tools to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A hydraulic tailstock for a CNC machine tool, comprising

[0008] A hydraulic tailstock has a base at its bottom end and adjustment mechanisms on both sides of the base.

[0009] A hydraulic needle sleeve is movably disposed inside the upper end of the hydraulic tailstock, a push pin is sleeved inside the front end of the hydraulic needle sleeve, and a fixing mechanism is provided between the push pin and the hydraulic needle sleeve.

[0010] Preferably, the adjusting mechanism includes a bearing seat, with a pair of bearing seats provided on both sides of the hydraulic tailstock, and a lead screw movably arranged between the middle parts of the bearing seats, with one end of the lead screw passing through the bearing seat and a bolt head fixedly installed thereon;

[0011] Preferably, the adjusting mechanism further includes a movable block, which is threaded to the outside of the lead screw, and a mounting base is fixedly connected to the outside of the movable block, with a standard bolt hole provided in the middle of the mounting base;

[0012] Preferably, the plug head is hexagonal in shape;

[0013] Preferably, the fixing mechanism includes a sleeve, a sleeve that is movably sleeved with the hydraulic needle sleeve is provided on the back of the ejector pin, guide grooves are provided on both sides of the inner wall of the hydraulic needle sleeve, and guide strips that match the guide grooves are provided on both sides of the outer wall of the sleeve.

[0014] Preferably, the fixing mechanism further includes a plug rod, which is movably disposed at the upper end of the hydraulic needle sleeve, and a slot matching the plug rod is provided at the upper middle part of the sleeve head.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This hydraulic tailstock for CNC machine tools, through the setting of an adjustment mechanism, uses a rotating bolt head to drive the lead screw to rotate, causing the movable block to move linearly along the lead screw, thereby changing the position of the mounting base and the standard bolt holes on it. This allows for flexible adjustment of the installation position according to the installation requirements of different CNC machine tools, solving the problem of fixed mounting hole positions in traditional tailstocks and inconvenience in adapting to CNC machine tools, thus improving the versatility and installation convenience of the hydraulic tailstock.

[0017] 2. This hydraulic tailstock for CNC machine tools has a fixing mechanism between the ejector pin and the hydraulic needle sleeve. The cooperation of the guide bar and the guide groove ensures the stability and guidance of the relative movement of the ejector pin and the hydraulic needle sleeve. The cooperation of the insert rod and the slot can fix the relative position of the ejector pin and the hydraulic needle sleeve when needed, preventing the ejector pin from loosening during processing. At the same time, the hydraulic tailstock adopts a one-ejector-one-clamping method, which effectively prevents long shaft parts from vibrating during processing, thereby significantly improving the processing accuracy of shaft parts. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the hydraulic tailstock structure of this utility model;

[0020] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 For the present utility model Figure 2 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Hydraulic tailstock; 2. Base; 3. Hydraulic needle sleeve; 4. Ejector pin; 5. Shaft seat; 6. Lead screw; 7. Bolt head; 8. Movable block; 9. Mounting seat; 10. Standard bolt hole; 11. Sleeve head; 12. Guide groove; 13. Guide bar; 14. Insert rod; 15. Slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, this utility model provides a technical solution:

[0025] A hydraulic tailstock for a CNC machine tool includes a hydraulic tailstock 1, a base 2 at the bottom of the hydraulic tailstock 1, and an adjustment mechanism on both sides of the base 2. The adjustment mechanism includes a bearing 5. A pair of bearings 5 ​​are provided on both sides of the hydraulic tailstock 1. A lead screw 6 is movably arranged between the middle of the bearings 5. One end of the lead screw 6 passes through the bearing 5 and is fixedly installed with a bolt head 7. The bolt head 7 is hexagonal. The adjustment mechanism also includes a movable block 8. The movable block 8 is threaded to the outside of the lead screw 6. A mounting seat 9 is fixedly connected to the outside of the movable block 8. A standard bolt hole 10 is provided in the middle of the mounting seat 9.

[0026] In this embodiment, by setting an adjustment mechanism, the rotating bolt head 7 drives the lead screw 6 to rotate, causing the movable block 8 to move linearly along the lead screw 6, thereby changing the position of the mounting base 9 and the standard bolt hole 10 on it. This allows for flexible adjustment of the installation position according to the installation requirements of different CNC machine tools, solving the problem of fixed mounting hole positions in traditional tailstocks that are inconvenient to adapt to CNC machine tools, and improving the versatility and ease of installation of the hydraulic tailstock.

[0027] like Figure 2 and Figure 4 As shown, a hydraulic needle sleeve 3 is movably disposed inside the upper end of the hydraulic tailstock 1, and a ejector pin 4 is sleeved inside the front end of the hydraulic needle sleeve 3. A fixing mechanism is provided between the ejector pin 4 and the hydraulic needle sleeve 3. The fixing mechanism includes a sleeve head 11. A sleeve head 11 is provided on the back of the ejector pin 4 to movably engage with the hydraulic needle sleeve 3. Guide grooves 12 are provided on both sides of the inner wall of the hydraulic needle sleeve 3. Guide strips 13 matching the guide grooves 12 are provided on both sides of the outer wall of the sleeve head 11. The fixing mechanism also includes an insertion rod 14. An insertion rod 14 is movably disposed at the upper end of the hydraulic needle sleeve 3. A slot 15 matching the insertion rod 14 is opened at the upper middle part of the sleeve head 11.

[0028] In this embodiment, a fixing mechanism is provided between the ejector pin 4 and the hydraulic needle sleeve 3. The cooperation of the guide bar 13 and the guide groove 12 ensures the stability and guidance of the relative movement of the ejector pin 4 and the hydraulic needle sleeve 3. The cooperation of the insertion rod 14 and the slot 15 can fix the relative position of the ejector pin 4 and the hydraulic needle sleeve 3 when needed, preventing the ejector pin 4 from becoming loose during processing. At the same time, the hydraulic tailstock adopts a clamping method of one ejector and one clamp, which effectively prevents the long shaft parts from vibrating during processing, thereby significantly improving the processing accuracy of shaft parts.

[0029] Working principle: When installing the hydraulic tailstock for CNC machine tools, the fixed position of the mounting holes on the tailstock may not be convenient for matching the CNC machine tool. In this case, the installation position can be adjusted using the adjustment mechanism. By using a tool to rotate the bolt head 7, the bolt head 7 drives the lead screw 6 to rotate between the shaft seats 5. Since the lead screw 6 and the movable block 8 are threadedly connected, the rotation of the lead screw 6 will cause the movable block 8 to move linearly along the lead screw 6, thereby driving the mounting seat 9 fixedly connected on the outside to move. The position of the standard bolt hole 10 set in the middle of the mounting seat 9 will also change accordingly. In this way, the position of the mounting seat 9 can be adjusted according to the installation requirements of the CNC machine tool, which facilitates the matching and installation of the hydraulic tailstock with the CNC machine tool. When machining shaft parts using a hydraulic tailstock, if the part is too long, clamping the long shaft part with a chuck alone will cause vibration, making it difficult to control the machining accuracy. At this time, the hydraulic tailstock is activated, and the hydraulic system works to push the hydraulic needle sleeve 3 to make linear motion inside the upper end of the hydraulic tailstock 1. The ejector pin 4, which is sleeved inside the front end of the hydraulic needle sleeve 3, moves accordingly. The ejector pin 4 presses against one end of the long shaft part, and cooperates with the chuck to achieve a clamping method of pressing and clamping, which effectively prevents the long shaft part from vibrating during the machining process. Regarding the connection between the ejector pin 4 and the hydraulic needle sleeve 3, the sleeve 11 on the back of the ejector pin 4 is movably sleeved with the hydraulic needle sleeve 3. The guide bars 13 on both sides of the outer wall of the sleeve 11 match the guide grooves 12 on both sides of the inner wall of the hydraulic needle sleeve 3, ensuring the stability and guidance of the relative movement of the ejector pin 4 and the hydraulic needle sleeve 3. When it is necessary to fix the relative position of the ejector pin 4 and the hydraulic needle sleeve 3, the insert rod 14 is inserted into the slot 15 at the upper middle part of the sleeve 11 that matches the insert rod 14, so that the ejector pin 4 and the hydraulic needle sleeve 3 can be relatively fixed, ensuring that the ejector pin 4 will not loosen during the processing and ensuring the processing accuracy.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic tailstock for a CNC machine tool, characterized in that: include A hydraulic tailstock (1) is provided with a base (2) at the bottom end of the hydraulic tailstock (1), and an adjustment mechanism is provided on both sides of the base (2). A hydraulic needle sleeve (3) is movably disposed inside the upper end of the hydraulic tailstock (1), and a push pin (4) is sleeved inside the front end of the hydraulic needle sleeve (3). A fixing mechanism is provided between the push pin (4) and the hydraulic needle sleeve (3).

2. A hydraulic tailstock for a CNC machine tool according to claim 1, characterized in that: The adjusting mechanism includes a bearing seat (5), and a pair of bearing seats (5) are provided on both sides of the hydraulic tailstock (1). A lead screw (6) is movably arranged between the middle parts of the bearing seats (5), and a bolt head (7) is fixedly installed at one end of the lead screw (6) through the bearing seat (5).

3. A hydraulic tailstock for a CNC machine tool according to claim 2, characterized in that: The adjustment mechanism also includes a movable block (8), which is threaded onto the outside of the lead screw (6). A mounting base (9) is fixedly connected to the outside of the movable block (8), and a standard bolt hole (10) is provided in the middle of the mounting base (9).

4. A hydraulic tailstock for a CNC machine tool according to claim 2, characterized in that: The plug head (7) is hexagonal in shape.

5. A hydraulic tailstock for a CNC machine tool according to claim 1, characterized in that: The fixing mechanism includes a sleeve (11), on the back of the ejector pin (4) a sleeve (11) that is movably sleeved with the hydraulic needle sleeve (3), guide grooves (12) are provided on both sides of the inner wall of the hydraulic needle sleeve (3), and guide strips (13) that match the guide grooves (12) are provided on both sides of the outer wall of the sleeve (11).

6. A hydraulic tailstock for a CNC machine tool according to claim 5, characterized in that: The fixing mechanism also includes a plug rod (14), which is movably mounted on the upper end of the hydraulic needle sleeve (3), and a slot (15) matching the plug rod (14) is provided at the upper middle part of the sleeve (11).

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