Auxiliary guide shaft transmission mechanism of numerical control machine tool

Abstract

The utility model relates to the technical field of guide shaft transmission, in particular to an auxiliary guide shaft transmission mechanism of a numerical control machine tool, which comprises a support frame, two sides of the top of the support frame are fixedly connected with connecting bearings, the inner walls of the two connecting bearings are jointly and fixedly connected with a guide shaft, and a guide channel is arranged in the middle of the guide shaft. A transmission lead screw is rotationally connected to the center of the inner wall of the guide channel, and one end of the guide shaft penetrates out of the outer side of the supporting frame and is fixedly connected with a driving belt wheel. The transmission device has the advantages that the sliding block can be positioned through the transmission lead screw, so that the sliding block is prevented from sliding at will, the driven belt wheel is prevented from deviating, meanwhile, the transmission lead screw and the guide shaft are driven by the brake sleeve piece to rotate oppositely, the sliding block can be driven to slide, the driven belt wheel can have sliding power, and the service life of the driven belt wheel is prolonged. The sliding block can synchronously slide along with an external belt wheel without being driven by the external belt wheel, so that the sliding stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of guide shaft transmission, in particular to an auxiliary guide shaft transmission mechanism of a numerically controlled machine tool. Background Art

[0002] Core-type CNC machine tools are mainly used to process slender shaft workpieces. In order to prevent the slender shaft workpiece from being deformed during high-speed rotation, a rotating guide sleeve is usually used to support the slender shaft workpiece. In order to avoid friction between the rotating guide sleeve and the slender shaft workpiece, a preset transmission mechanism is required to drive the rotating guide sleeve to rotate and enable the rotating guide sleeve to rotate synchronously with the spindle of the CNC machine tool.

[0003] In Chinese utility model CN215788431U, an auxiliary guide shaft transmission mechanism of a CNC machine tool is disclosed. The auxiliary guide shaft transmission mechanism of the CNC machine tool adopts the cooperation of a ball spline nut and a spline shaft to realize that the main shaft synchronous driven pulley transmits torque to the transmission shaft to drive the transmission shaft to rotate, and can also realize that the main shaft synchronous driven pulley can slide axially relative to the transmission shaft, so that the main shaft synchronous driven pulley can cooperate with the main shaft synchronous driving pulley on the main shaft of the CNC machine tool. The design is reasonable. Under the requirement of high-precision transmission of large torque, the main shaft synchronous driven pulley can slide axially relative to the transmission shaft, which is convenient for the implementation of the scheme. However, the auxiliary guide shaft transmission mechanism of the CNC machine tool still has the following problems in use:

[0004] The auxiliary guide shaft transmission mechanism of the CNC machine tool only has transmission and guidance, while the main shaft synchronous driven pulley lacks positioning and drive, which causes it to easily deviate during the transmission process, and its sliding drive relies on external force and lacks its own sliding power. Utility Model Content

[0005] The purpose of the present invention is to solve at least one of the above technical deficiencies.

[0006] Therefore, one purpose of the utility model is to provide an auxiliary guide shaft transmission mechanism for a CNC machine tool to solve the problems mentioned in the background technology and overcome the deficiencies in the prior art.

[0007] In order to achieve the above-mentioned purpose, an embodiment of the utility model on one hand provides an auxiliary guide shaft transmission mechanism of a CNC machine tool, including a support frame, both sides of the top of the support frame are fixedly connected with connecting bearings, the inner walls of the two connecting bearings are commonly fixedly connected with a guide shaft, a guide groove is opened in the middle of the guide shaft, a transmission screw is rotatably connected at the center of the inner wall of the guide groove, one end of the guide shaft passes through the outside of the support frame and is fixedly connected with a driving pulley, the outer wall of the guide shaft is slidably connected with a driven pulley, the center of the inner wall of the driven pulley is fixedly connected with a slider, the slider is slidably connected to the inner wall of the guide groove, the center of the slider is threadedly connected to the transmission screw, one end of the transmission screw passes through the center of the end of the guide shaft away from the driving pulley, a fixing plate is fixedly connected to a side of the outer wall of the support frame away from the driving pulley, a brake kit is commonly installed on the bottom surface of the fixing plate and the end of the transmission screw passing through the guide shaft, and the guide shaft is rotatably connected to the support frame through the connecting bearing.

[0008] Preferably, any of the above schemes has the length of the guide groove matched with the length of the inner wall of the support frame, the length of the threaded portion of the drive screw matched with the length of the guide groove, and the threaded portion of the drive screw was completely located inside the guide groove.

[0009] The technical effect achieved by adopting the above solution is: the transmission stroke of the transmission screw is located inside the guide groove to prevent interference.

[0010] Preferably, any of the above schemes comprises a brake disc fixedly connected to one end of a transmission screw and a brake caliper fixedly connected to one side of a bottom surface of a fixed plate, and the brake disc is located at the center of an inner wall of the brake caliper.

[0011] The technical effect achieved by adopting the above scheme is: the transmission screw can be fixed by clamping the brake disc through the brake caliper, so that when the guide shaft rotates, the transmission screw and the guide shaft can rotate relative to each other, thereby driving the driven pulley to slide, without the need to install a power source, thereby reducing the cost of use.

[0012] Preferably, in any of the above schemes, the width of the slider is matched with the width of the inner wall of the guide groove, and the diameter of the inner wall of the driven pulley is matched with the diameter of the outer wall of the guide shaft.

[0013] The technical effect achieved by adopting the above scheme is: preventing large gaps from appearing between the slider, the driven pulley and the inner wall of the guide groove and the outer wall of the guide shaft, thereby preventing shaking.

[0014] Preferably, any of the above schemes comprises a servo motor fixedly connected to one side of the bottom surface of the fixed plate, and an output end of the servo motor is coaxially fixedly connected to one end of the transmission screw.

[0015] The technical effect achieved by adopting the above scheme is: by driving the transmission screw to rotate through the servo motor, the rotation speed of the transmission screw can be flexibly controlled, thereby accurately driving the driven pulley to slide.

[0016] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0017] The auxiliary guide shaft transmission mechanism of the CNC machine tool can position the slider through the transmission screw, thereby preventing the slider from sliding randomly and preventing the driven pulley from deviating. At the same time, the transmission screw and the guide shaft are driven to rotate in opposite directions through the brake kit, thereby driving the slider to slide, so that the driven pulley can have its own sliding power, so that it can slide synchronously with the external pulley without relying on the external pulley to drive, thereby improving the sliding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the top view of the structure of the first embodiment of the utility model;

[0020] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-section structure at AA in the middle;

[0021] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0022] In the figure: 1-support frame, 2-connecting bearing, 3-guide shaft, 4-driving pulley, 5-guide groove, 6-driven pulley, 8-brake disc, 9-fixing plate, 10-brake caliper, 11-transmission screw, 12-slider, 13-servo motor. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0024] Embodiment 1: Figures 1 to 4As shown, an auxiliary guide shaft transmission mechanism of a CNC machine tool comprises a support frame 1, both sides of the top of the support frame 1 are fixedly connected with connecting bearings 2, the inner walls of the two connecting bearings 2 are commonly fixedly connected with a guide shaft 3, a guide groove 5 is opened in the middle of the guide shaft 3, a transmission screw 11 is rotatably connected at the center of the inner wall of the guide groove 5, one end of the guide shaft 3 passes through the outer side of the support frame 1 and is fixedly connected with a driving pulley 4, the outer wall of the guide shaft 3 is slidably connected with a driven pulley 6, the center of the inner wall of the driven pulley 6 is fixedly connected with a slider 12, the slider 12 is slidably connected to the inner wall of the guide groove 5, the center of the slider 12 is threadedly connected with the transmission screw 11, one end of the transmission screw 11 passes through the center of the end of the guide shaft 3 away from the driving pulley 4, a side surface of the outer wall of the support frame 1 away from the driving pulley 4 is fixedly connected with a fixing plate 9, a brake kit is commonly installed on the bottom surface of the fixing plate 9 and the end of the transmission screw 11 passing through the guide shaft 3, and the guide shaft 3 is rotatably connected to the support frame 1 through the connecting bearing 2.

[0025] As an optional technical solution of the utility model, the length of the guide groove 5 is adapted to the length of the inner wall of the support frame 1, the length of the threaded portion of the transmission screw 11 is adapted to the length of the guide groove 5, and the threaded portion of the transmission screw 11 is completely located inside the guide groove 5, so that the transmission stroke of the transmission screw 11 is located inside the guide groove 5 to prevent interference.

[0026] As an optional technical solution of the present invention, the brake kit includes a brake disc 8 fixedly connected to one end of a transmission screw 11 and a brake caliper 10 fixedly connected to one side of the bottom surface of a fixed plate 9. The brake disc 8 is located at the center of the inner wall of the brake caliper 10. The transmission screw 11 can be fixed by clamping the brake disc 8 with the brake caliper 10. In this way, when the guide shaft 3 rotates, the transmission screw 11 and the guide shaft 3 can be made to rotate relative to each other, thereby driving the driven pulley 6 to slide. There is no need to install a power source, thereby reducing the cost of use.

[0027] As an optional technical solution of the present invention, the width of the slider 12 is adapted to the width of the inner wall of the guide groove 5, and the diameter of the inner wall of the driven pulley 6 is adapted to the diameter of the outer wall of the guide shaft 3, thereby preventing a large gap from appearing between the slider 12, the driven pulley 6 and the inner wall of the guide groove 5 and the outer wall of the guide shaft 3, thereby preventing shaking.

[0028] Embodiment 2: An auxiliary guide shaft transmission mechanism for a numerically controlled machine tool, comprising a support frame 1, both sides of the top of the support frame 1 are fixedly connected with connecting bearings 2, the inner walls of the two connecting bearings 2 are commonly fixedly connected with a guide shaft 3, a guide groove 5 is opened in the middle of the guide shaft 3, a transmission screw 11 is rotatably connected at the center of the inner wall of the guide groove 5, one end of the guide shaft 3 passes through the outside of the support frame 1 and is fixedly connected with a driving pulley 4, the outer wall of the guide shaft 3 is slidably connected with a driven pulley 6, the center of the inner wall of the driven pulley 6 is fixedly connected with a slider 12, the slider 12 is connected to the inner wall of the guide groove 5 The wall is slidably connected, the center of the slider 12 is threadedly connected to the transmission screw 11, one end of the transmission screw 11 passes through the center of the guide shaft 3 away from the driving pulley 4, and the side of the outer wall of the support frame 1 away from the driving pulley 4 is fixedly connected with a fixing plate 9, and the bottom surface of the fixing plate 9 and the end of the transmission screw 11 passing through the guide shaft 3 are jointly installed with a brake kit, the guide shaft 3 is rotatably connected to the support frame 1 through the connecting bearing 2, and the brake kit includes a servo motor 13 fixedly connected to one side of the bottom surface of the fixing plate 9, and the output end of the servo motor 13 is coaxially fixedly connected to one end of the transmission screw 11.

[0029] In this embodiment, the servo motor 13 drives the transmission screw 11 to rotate, and the rotation speed of the transmission screw 11 can be flexibly controlled, so that the driven pulley 6 can be driven to slide accurately.

[0030] An auxiliary guide shaft transmission mechanism for a CNC machine tool, the working principle is as follows:

[0031] 1) The slider 12 can be positioned by the transmission screw 11, thereby preventing the slider 12 from sliding randomly;

[0032] 2) The driving screw 11 and the guide shaft 3 are driven to rotate in opposite directions through the brake kit, thereby driving the slider 12 to slide, so that the driven pulley 6 can have its own sliding power, so that it can slide synchronously with the external pulley.

[0033] To sum up, the auxiliary guide shaft transmission mechanism of the CNC machine tool can position the slider 12 through the transmission screw 11, thereby preventing the slider 12 from sliding randomly and preventing the driven pulley 6 from shifting. At the same time, the transmission screw 11 and the guide shaft 3 are driven to rotate in opposite directions through the brake kit, thereby driving the slider 12 to slide, so that the driven pulley 6 can have its own sliding power, so that it can slide synchronously with the external pulley without relying on the external pulley to drive, thereby improving the sliding stability.

[0034] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An auxiliary guide shaft transmission mechanism for a CNC machine tool, characterized in that: The invention comprises a support frame (1), both sides of the top of the support frame (1) are fixedly connected with connecting bearings (2), the inner walls of the two connecting bearings (2) are fixedly connected with a guide shaft (3), the middle of the guide shaft (3) is provided with a guide groove (5), the center of the inner wall of the guide groove (5) is rotatably connected with a transmission screw (11), one end of the guide shaft (3) passes through the outer side of the support frame (1) and is fixedly connected with a driving pulley (4), the outer wall of the guide shaft (3) is slidably connected with a driven pulley (6), and the center of the inner wall of the driven pulley (6) is fixedly connected with a sliding The slide block (12) is slidably connected to the inner wall of the guide groove (5), the center of the slide block (12) is threadedly connected to the transmission screw (11), one end of the transmission screw (11) passes through the center of the guide shaft (3) away from the driving pulley (4), the side of the outer wall of the support frame (1) away from the driving pulley (4) is fixedly connected with a fixing plate (9), the bottom surface of the fixing plate (9) and the end of the transmission screw (11) passing through the guide shaft (3) are jointly installed with a brake kit, and the guide shaft (3) is rotatably connected to the support frame (1) through a connecting bearing (2).

2. The auxiliary guide shaft transmission mechanism of a CNC machine tool according to claim 1, characterized in that: The length of the guide groove (5) matches the length of the inner wall of the support frame (1), the length of the threaded portion of the drive screw (11) matches the length of the guide groove (5), and the threaded portion of the drive screw (11) is completely located inside the guide groove (5).

3. The auxiliary guide shaft transmission mechanism of a CNC machine tool according to claim 1, characterized in that: The brake kit comprises a brake disc (8) fixedly connected to one end of a transmission screw (11) and a brake caliper (10) fixedly connected to one side of the bottom surface of a fixed plate (9), wherein the brake disc (8) is located at the center of the inner wall of the brake caliper (10).

4. The auxiliary guide shaft transmission mechanism of a CNC machine tool according to claim 1, characterized in that: The width of the slider (12) matches the width of the inner wall of the guide groove (5), and the diameter of the inner wall of the driven pulley (6) matches the diameter of the outer wall of the guide shaft (3).

5. The auxiliary guide shaft transmission mechanism of a CNC machine tool according to claim 1, characterized in that: The brake kit comprises a servo motor (13) fixedly connected to the bottom surface of the fixed plate (9), and the output end of the servo motor (13) is coaxially fixedly connected to one end of the transmission screw (11).

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