Visual tailstock jacking force mechanism of machine tool

Abstract

The utility model relates to the technical field of jacking force mechanisms, and discloses a visual tailstock jacking force mechanism of a machine tool, the jacking force is accurately measured by arranging a display instrument, a wedge block, a belleville spring group and other structures, a tailstock shaft slides towards the inner direction of a gear box body after being subjected to the jacking force, and meanwhile, the wedge block is driven to move together; the tailstock shaft transmits jacking force to the belleville spring set through the wedge block, the belleville spring set can only contract due to the fact that the position is limited by the wedge block and the bearing sleeve, the belleville spring set has certain telescopic force, the displacement amount of the force is changed from the axial direction to the radial direction through the wedge block, and the sliding amount of the wedge block can be different due to the change of the displacement amount. The outer ring of the wedge-shaped block is attached to the end of the instrument rod, when the wedge-shaped block moves, the instrument rod can slide up and down in the needle groove, then the display instrument displays jacking force data measured by the instrument rod, and the effect of measuring the jacking force is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of clamping force mechanism, and in particular to a machine tool visible tailstock clamping force mechanism. Background Technology

[0002] Machine tools are machines used to manufacture machinery and equipment. They play a vital role in the modernization of the national economy. A lathe is a machine tool that primarily uses a cutting tool to machine rotating workpieces. Drills, reamers, taps, dies, and knurling tools can also be used on a lathe for corresponding machining operations. A tailstock is required during the machining process to provide support and clamp the workpiece.

[0003] In existing technologies, lathe tailstocks generally lack a clamping force display device; the clamping force relies on the operator's manual judgment, making it impossible to guarantee the correct force. During rough machining, the clamping force needs to be increased, while during finish machining, it needs to be decreased to reduce deformation. Excessive clamping force can lead to workpiece deformation, wear of the center hole, or damage to the tailstock bearing. Insufficient clamping force may cause workpiece slippage, affecting machining accuracy and even causing accidents. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a machine tool visible tailstock clamping force mechanism, which has the advantages of detecting clamping force and being easy to use, thus solving the problems mentioned in the background technology.

[0005] This utility model provides the following technical solution: a machine tool visible tailstock clamping force mechanism, including a tailstock body, the tailstock body being a machine tool tailstock component, a gearbox body fixedly installed on one side of the tailstock body, a handwheel rotatably installed on one side of the gearbox body, a tailstock shaft rotatably installed inside the tailstock body and the gearbox body, a display instrument fixedly installed on the top of the tailstock body on one side of the gearbox body, a needle groove opened below the display instrument on the top of the tailstock body, a sleeve fixedly sleeved inside the tailstock body, the sleeve being located on the outer ring of the tailstock shaft, a threaded nut seat movably installed on one side of the sleeve, a bearing sleeve rotatably installed inside the gearbox body on one side of the tailstock body, a wedge block fixedly sleeved between the threaded nut seat and the bearing sleeve on the outer ring of the tailstock shaft, a butterfly spring assembly installed between the wedge block and one end of the outer ring of the bearing sleeve, and the other end of the butterfly spring assembly being engaged with the end outer ring of the bearing sleeve.

[0006] With the above structural setup, the tailstock shaft drives the wedge block to compress the disc spring assembly. Due to the principle of extension and retraction, the disc spring assembly is compressed. Through the force exerted by the tailstock shaft and the disc spring assembly on the wedge block, the actual clamping force data is finally measured by the instrument rod. Users can make fine adjustments by observing the clamping force data to ensure the accuracy and stability during processing.

[0007] Preferably, the bottom of the display instrument is provided with an instrument rod, the instrument rod is located entirely inside the needle groove, and the bottom end of the instrument rod is in contact with the outer ring of the wedge block.

[0008] With the above structural setup, when the wedge block moves, because the outer ring of the wedge block is conical, the instrument rod moves upward due to the pressure of the outer ring of the wedge block. Then, the feed amount of the wedge block is displayed on the display instrument, and the data of the clamping force is measured.

[0009] Preferably, a portion of the outer ring of the tailstock shaft is threaded, the threaded nut is threaded onto the outer ring of the tailstock shaft, the inner ring of the threaded nut is threaded with a groove, and the inner ring of the threaded nut and the outer ring of the tailstock shaft are threaded to match.

[0010] Preferably, the bearing sleeve is slidably fitted onto the outer ring of the tailstock shaft, and a bearing is movably installed between the outer ring end of the bearing sleeve and the outer wall of the gearbox body. One side of the bearing is fixedly installed on the outer wall of the gearbox body, and the other side of the bearing is fixedly installed on the outer ring end of the bearing sleeve.

[0011] Preferably, the outer ring of the wedge block is conical, the diameter of the outer ring of the wedge block gradually decreases, one side of the wedge block is fixedly installed with a connecting sleeve on the outer ring of the tailstock shaft, and one end of the outer ring of the butterfly spring assembly is stuck in the outer ring of the connecting sleeve.

[0012] Through the above structural design, the force and deformation principle of the butterfly spring assembly converts the clamping force of the tailstock shaft into the deformation of the butterfly spring assembly, and changes the magnitude of the deformation by mutual squeezing between the wedge block and the butterfly spring assembly.

[0013] This utility model has the following advantages:

[0014] 1. The machine tool's visual tailstock clamping force mechanism achieves accurate measurement of clamping force through the setting of display instruments, wedge blocks, and butterfly spring groups. After the tailstock shaft is subjected to clamping force, it slides inward toward the gearbox, simultaneously driving the wedge blocks to move together. The tailstock shaft transmits the clamping force to the butterfly spring group through the wedge blocks. Due to the restriction of the position between the wedge blocks and the bearing sleeve, the butterfly spring group can only retract. The butterfly spring group has a certain extension force, which changes the displacement from axial to radial through the wedge blocks. The change in the magnitude of the displacement results in different sliding amounts of the wedge blocks. The outer ring of the wedge blocks is in contact with the end of the instrument rod. When the wedge blocks move, the instrument rod can slide up and down inside the needle groove, thereby enabling the display instrument to display the clamping force data measured by the instrument rod, achieving the effect of measuring the clamping force.

[0015] 2. The machine tool's visual tailstock clamping force mechanism achieves precise display through the setting of wedge blocks, display instruments, and instrument rods. The display instrument shows the clamping force based on the radial displacement of the instrument rod. In the above operation, the wedge block converts its own axial displacement into radial displacement of the instrument rod, and the corresponding relationship can be adjusted to accurately display the clamping force of the tailstock shaft. With appropriate clamping force, the machining accuracy and stability are ensured, achieving the effect of accurately displaying the clamping force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the tailstock body of this utility model;

[0018] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0020] In the diagram: 1. Tailstock body; 2. Gearbox body; 21. Handwheel; 3. Tailstock shaft; 4. Display instrument; 41. Instrument rod; 5. Sleeve; 6. Threaded nut seat; 7. Bearing sleeve; 71. Bearing; 8. Wedge block; 81. Connecting sleeve; 9. Butterfly spring assembly. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4A visible tailstock clamping mechanism for a machine tool includes a tailstock body 1, which is a tailstock component of the machine tool. A gearbox body 2 is fixedly installed on one side of the tailstock body 1, and a handwheel 21 is rotatably installed on one side of the gearbox body 2. A tailstock shaft 3 is rotatably installed inside the tailstock body 1 and the gearbox body 2. A display instrument 4 is fixedly installed on the top of the tailstock body 1, located on one side of the gearbox body 2. A needle groove is opened on the top of the tailstock body 1 below the display instrument 4. A sleeve 5 is fixedly sleeved inside the tailstock body 1, located on the outer ring of the tailstock shaft 3. A threaded nut 6 is movably installed on one side of the sleeve 5. A bearing sleeve 7 is rotatably installed inside the gearbox body 2, located on one side of the tailstock body 1. The bearing sleeve 7 is slidably sleeved on the outer ring of the tailstock shaft 3, and the outer ring end of the bearing sleeve 7 is movably installed between the outer wall of the gearbox body 2 and the outer ring of the bearing sleeve 7. A bearing 71 is provided, with one side of the bearing 71 fixedly mounted on the outer wall of the gearbox body 2 and the other side of the bearing 71 fixedly mounted on the outer ring end of the bearing sleeve 7, allowing the bearing sleeve 7 to rotate on the outer wall of the gearbox body 2. A wedge block 8 is fixedly sleeved between the outer ring of the tailstock shaft 3 and the nut seat 6 and the bearing sleeve 7. The outer ring of the wedge block 8 is conical, and the diameter of the outer ring of the wedge block 8 gradually decreases. A connecting sleeve 81 is fixedly mounted on one side of the wedge block 8 on the outer ring of the tailstock shaft 3. A butterfly spring assembly 9 is installed between the connecting sleeve 81 and one end of the outer ring of the bearing sleeve 7. One end of the outer ring of the butterfly spring assembly 9 is stuck on the outer ring of the connecting sleeve 81, and the other end of the outer ring of the butterfly spring assembly 9 is stuck on the end of the outer ring of the bearing sleeve 7, thereby enabling the butterfly spring assembly 9 to be squeezed when the gap between the connecting sleeve 81 and the bearing sleeve 7 decreases.

[0023] Please see Figures 1-4 The outer ring of the tailstock shaft 3 is threaded, and the threaded nut 6 is threadedly fitted onto the outer ring of the tailstock shaft 3. The inner ring of the threaded nut 6 is threaded with a groove, and the threads of the inner ring of the threaded nut 6 and the outer ring of the tailstock shaft 3 are matched.

[0024] Please see Figures 1-4 The bottom of the display instrument 4 is provided with an instrument rod 41, which is located inside the needle groove. The bottom end of the instrument rod 41 is in contact with the outer ring of the wedge block 8. When the tailstock shaft 3 slides into the gearbox 2, it drives the wedge block 8 to move together. Since the outer ring of the wedge block 8 is conical, the instrument rod 41 moves upward due to the pressure of the outer ring of the wedge block 8. Then, the feed amount of the wedge block 8 is displayed by the display instrument 4, and the clamping force data is measured.

[0025] As the tailstock shaft 3 slides towards the inside of the gearbox 2, the wedge block 8 moves along with the position of the tailstock shaft 3. One side of the connecting sleeve 81 is squeezed by the butterfly spring assembly 9. According to the force and deformation principle of the butterfly spring assembly 9, the clamping force of the tailstock shaft 3 is converted into the deformation of the butterfly spring assembly 9. The wedge block 8 and the butterfly spring assembly 9 squeeze each other to change the magnitude of the deformation. Then, the actual clamping force is measured by the contact between the end of the instrument rod 41 and the outer ring of the wedge block 8, and finally displayed by the pressure gauge.

[0026] This structure consists of a butterfly spring assembly 9, a wedge block 8, a tailstock shaft 3, and a display instrument 4, which can withstand a certain rated force. It can accurately display the axial clamping force of the tailstock body 1. In practical applications, the butterfly spring assembly 9 and the wedge block 8 can be modified in size and shape as needed to meet the requirements of different clamping forces.

[0027] In use, the device uses the tailstock shaft 3 to drive the wedge block 8 to compress the butterfly spring assembly 9. Due to the principle of extension and retraction, the wedge block 8 is compressed. The force exerted by the tailstock shaft 3 and the butterfly spring assembly 9 on the wedge block 8 is ultimately measured by the instrument rod 41 to obtain the actual clamping force data. Users can make fine adjustments by observing the clamping force data to ensure the accuracy and stability during processing.

[0028] This device, consisting of a tailstock shaft 3, a display instrument 4, a wedge block 8, and a butterfly spring assembly 9, features a simple and reliable structure. The display instrument 4 uses a mechanical device for detection and provides a mechanical pressure display, eliminating the need for additional hydraulic or electrical devices. This makes it convenient and flexible to use, and also results in low manufacturing costs.

[0029] Working Principle: In use, this device is installed at the tail of the machine tool. The workpiece is installed between the machine tool's fixed device and this device, positioning the workpiece between the fixed device and the end of the tailstock shaft 3. Under the clamping force, the tailstock shaft 3 slides inwards towards the gearbox 2, simultaneously moving the wedge block 8. The tailstock shaft 3 transmits the clamping force to the disc spring assembly 9 through the wedge block 8. Because the disc spring assembly 9's position is restricted by the wedge block 8 and the bearing sleeve 7, it can only contract. The disc spring assembly 9 possesses a certain extension and retraction force. This force, through the wedge block 8, changes the displacement from axial to radial, and the magnitude of the displacement... The change in the wedge block 8 allows for different sliding amounts. The outer ring of the wedge block 8 is in contact with the end of the instrument rod 41. When the position of the wedge block 8 moves, the instrument rod 41 can slide up and down inside the needle groove, thereby allowing the display instrument 4 to display the clamping force data measured by the instrument rod 41. The display instrument 4 displays the clamping force based on the radial displacement of the instrument rod 41. In the above operation, the wedge block 8 converts its own axial displacement into radial displacement of the instrument rod 41, and the corresponding relationship can be adjusted to accurately display the clamping force of the tailstock shaft 3. By using a suitable clamping force, the accuracy and stability of the machining are ensured.

Claims

1. A machine tool visual tailstock clamping force mechanism, comprising a tailstock body (1), characterized in that: The tailstock body (1) is a machine tool tailstock component. A gearbox body (2) is fixedly installed on one side of the tailstock body (1). A handwheel (21) is rotatably installed on one side of the gearbox body (2). A tailstock shaft (3) is rotatably installed inside the tailstock body (1) and the gearbox body (2). A display instrument (4) is fixedly installed on the top of the tailstock body (1) on one side of the gearbox body (2). A needle groove is opened on the top of the tailstock body (1) below the display instrument (4). A sleeve (5) is fixedly sleeved inside the tailstock body (1). The sleeve (5) is located on the outer ring of the tailstock shaft (3). A nut seat (6) is movably installed on one side of the sleeve (5). A bearing sleeve (7) is rotatably installed inside the gearbox body (2) on one side of the tailstock body (1). A wedge block (8) is fixedly sleeved between the nut seat (6) and the bearing sleeve (7) on the outer ring of the tailstock shaft (3). A butterfly spring assembly (9) is installed between the wedge block (8) and one end of the outer ring of the bearing sleeve (7). The other end of the butterfly spring assembly (9) is stuck on the end outer ring of the bearing sleeve (7).

2. The visual tailstock live center force mechanism for machine tools according to claim 1, characterized in that: The bottom of the display instrument (4) is provided with an instrument rod (41), the instrument rod (41) is located inside the needle groove, and the bottom end of the instrument rod (41) is in contact with the outer ring of the wedge block (8).

3. The visual tailstock live center force mechanism of claim 2, wherein: The outer ring of the tailstock shaft (3) is threaded, and the threaded nut (6) is threaded onto the outer ring of the tailstock shaft (3). The inner ring of the threaded nut (6) is threaded, and the inner ring of the threaded nut (6) is threaded to match the outer ring of the tailstock shaft (3).

4. The visual tailstock live center force mechanism of claim 3, wherein: The bearing sleeve (7) is slidably sleeved on the outer ring of the tailstock shaft (3). A bearing (71) is movably installed between the outer ring end of the bearing sleeve (7) and the outer wall of the gearbox body (2). One side of the bearing (71) is fixedly installed on the outer wall of the gearbox body (2), and the other side of the bearing (71) is fixedly installed on the outer ring end of the bearing sleeve (7).

5. The visual tailstock live center force mechanism of claim 4, wherein: The outer ring of the wedge block (8) is conical, and the diameter of the outer ring of the wedge block (8) gradually decreases. One side of the wedge block (8) is fixedly installed on the outer ring of the tailstock shaft (3), and one end of the butterfly spring assembly (9) is stuck on the outer ring of the connecting sleeve (81).

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