Machine head lifting counterweight mechanism of numerical control machine tool

Abstract

The utility model discloses a machine head lifting counterweight mechanism of a numerical control machine tool, which comprises a workbench, a stand column, a sliding seat, a machine head and a counterweight box, and a plurality of counterweight blocks are arranged in the counterweight box. A plurality of hanging rings are arranged above the weight box and the sliding seat respectively, the hanging rings on the two sides are connected through traction steel wire ropes respectively, a plurality of pulley assemblies are arranged at the upper end of the stand column, and the pulley assemblies support and guide the traction steel wire ropes. According to the lifting counterweight mechanism for the machine head of the numerical control machine tool, through the arrangement of the counterweight box, the stress of the sliding seat and the mass distribution of the whole stand column can be changed to reach certain balance, so that the moving stability and the stopping stability of the sliding seat can be improved, unbalanced stress and vibration caused by operation of the machine tool are reduced, and the service life of the machine tool is prolonged. And the machining stability and precision of the machine head can be improved.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, specifically to a CNC machine tool head lifting and counterweight mechanism. Background Technology

[0002] The worktable is one of the most important components of a machine tool, serving as the main platform for supporting the machine tool's machining components and the workpiece to be processed. The worktable typically has a column, on which a movable and height-adjustable machine head assembly is mounted. These machine head assemblies are critical components in machining, and their stability directly affects the machining accuracy.

[0003] Generally, the machine head assembly is mounted on the column via a sliding system to achieve vertical (Z-axis) movement. Although the sliding system allows it to hover, its stability decreases over long-term operation due to wear and vibration, failing to maintain the machine head assembly's stability effectively. Some systems use counterweights to balance the machine head assembly, but these methods often involve directly connecting counterweight blocks, and their placement makes weight adjustment inconvenient. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a CNC machine tool head lifting and counterweight mechanism.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A CNC machine tool head lifting and counterweight mechanism includes a worktable, a column on the worktable, a liftable slide on one side of the column, the machine head being connected and mounted on the slide, a liftable counterweight box on the other side of the column opposite to the slide, and a plurality of counterweight blocks inside the counterweight box; a plurality of lifting rings are respectively provided above the counterweight box and the slide, the lifting rings on both sides being connected by traction steel wire ropes, and a plurality of pulley assemblies are provided at the upper end of the column, the pulley assemblies supporting and guiding the traction steel wire ropes.

[0007] This CNC machine tool head lifting counterweight mechanism, through the setting of the counterweight box, can change the force on the slide and the mass distribution of the entire column, so as to achieve a certain balance. This can improve the moving stability and stopping stability of the slide, reduce the unbalanced force and vibration caused by the operation of the machine tool, and help improve the stability and accuracy of the machine head machining. Moreover, this counterweight mechanism has a simple structure, is easy to connect and install, and its spatial arrangement is relatively reasonable, without occupying too much space on the machine tool or affecting the operation of other components.

[0008] CNC machine tools generate vibrations during machining, which can affect machining accuracy. Appropriate counterweights in the counterweight box and counterweight blocks can reduce machine tool vibration and improve machining accuracy. Simultaneously, this counterweight configuration makes the overall structure of the machine tool column more stable, reducing structural deformation caused by uneven mass distribution, thereby improving the machine tool's stability and lifespan. Due to the counterweight setup, overall vibration is reduced, structural deformation is minimized, and the machine head operates more stably, which also contributes to improved machining accuracy.

[0009] The counterweight box and the slide are respectively located on the front and back sides of the column, and both can slide relative to the column, so that they can form a counterweight system that rises and falls, making it easier to achieve a relative balance state and making full use of the unused space on the back of the column.

[0010] The lifting ring facilitates the connection of the traction steel wire rope. The pulley assembly allows the traction steel wire rope to receive better force, providing better support and guidance, which is beneficial for force transmission and achieving a balanced state.

[0011] The counterweight is installed in the counterweight box to facilitate the placement and removal of the counterweight. The number of counterweights can be adjusted according to the actual stress and machine tool operating conditions, and the weight of the counterweight can be adjusted by adding or removing counterweights.

[0012] Furthermore, there are two lifting rings on the counterweight box and two on the slide, so that the counterweight box is connected to the slide via two traction steel wire ropes. A bolt post is provided below the lifting ring, and the bolt post is connected to the counterweight box or the slide.

[0013] Furthermore, there are four pulley assemblies, which are respectively located at the four corners of the upper edge of the column.

[0014] Furthermore, the pulley assembly includes a mounting base disposed on the upper edge of the column, the mounting base having a pair of outwardly extending inclined arms, and a pulley connected between the pair of inclined arms via an axle, the traction wire rope being connected to the pulley. This allows the pulley to extend beyond the column and suspend outside the column's area, thus better guiding and pulling the traction wire rope, allowing the traction wire rope to be arranged vertically to horizontally.

[0015] Furthermore, several of the pulleys are at the same support height, and the traction wire rope extends vertically to the pulley on the side where the slide is located, then horizontally to the pulley on the side where the counterweight box is located, and then vertically to the counterweight box.

[0016] Furthermore, a pair of first vertical slide rails are provided on one side of the column, and the slide block is slidably mounted on the pair of first vertical slide rails. A servo motor is also provided above the column, and the servo motor is connected to and drives a lead screw. The lead screw is connected to the slide block through a lead screw sleeve.

[0017] Furthermore, a pair of second vertical slide rails are provided on the other side of the column, and several small sliders are provided on the pair of second vertical slide rails. The small sliders are connected to the counterweight box, which not only facilitates the connection and installation of the counterweight box, but also serves as a guide.

[0018] Furthermore, the counterweight box includes a box body, one side of which is provided with an openable and closable door. Several layers of counterweight blocks are stacked inside the box body, and at least one vertically adjacent set of counterweight blocks is provided with a clearance gap to facilitate tools or hands to enter and grab the counterweight blocks.

[0019] Preferably, the counterweight block is provided with a through-hole, and the stacked counterweight blocks are provided with a connecting rod passing through the through-hole, the connecting rod connecting to the counterweight box.

[0020] Compared with the prior art, the beneficial effects of this utility model are: 1. The counterweight mechanism for lifting the CNC machine tool head, through the setting of the counterweight box, can change the force on the slide and the mass distribution of the entire column, so as to achieve a certain balance. This can improve the moving stability and stopping stability of the slide, thereby reducing the unbalanced force and vibration caused by the operation of the machine tool, which is conducive to improving the stability and accuracy of the machine head machining; 2. Appropriate counterweighting through the counterweight box and the counterweight block can reduce machine tool vibration and improve machining accuracy. At the same time, this counterweight form can make the overall structure of the machine tool column more stable, reduce the structural deformation caused by uneven mass distribution, thereby improving the stability and life of the machine tool; due to the setting of the counterweight, the overall vibration is smaller and the structural deformation is less. 1. The smaller size makes the machine head run more stably, which is conducive to improving processing accuracy; 2. The counterweight box and the slide are respectively located on the front and back sides of the column, and both can slide relative to the column, so that they can form a counterweight system of lifting and lowering, making it easier to achieve a relative balance state, and making full use of the unused space on the back of the column; 3. The setting of the lifting ring facilitates the connection of the traction steel wire rope. The setting of the pulley assembly allows the traction steel wire rope to better bear the force, obtain better support and guidance, and facilitate the transmission of force; 4. The counterweight block is set in the counterweight box, which facilitates the placement and removal of the counterweight block. The number of counterweight blocks can be adjusted according to the actual force and machine tool operating conditions, and the counterweight weight can be adjusted by adding or removing counterweight blocks. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of a CNC machine tool head lifting and counterweight mechanism according to the present invention.

[0022] Figure 2 This is a side view of the counterweight mechanism on the column of this utility model.

[0023] Figure 3 This is a structural schematic diagram of the side where the upper slide of the column of this utility model is located;

[0024] Figure 4 This is a structural schematic diagram of the side where the counterweight box on the column of this utility model is located;

[0025] Figure 5 This is a schematic diagram of the counterweight box of this utility model;

[0026] Figure 6 This is a schematic diagram showing the arrangement of the counterweight blocks inside the counterweight box of this utility model;

[0027] Figure 7 This is a schematic diagram of another structure of the counterweight box of this utility model;

[0028] In the diagram: 1. Workbench; 2. Column; 3. Slide; 4. Machine head; 5. Counterweight box; 501. Box body; 502. Box door; 6. Counterweight block; 7. Lifting ring; 8. Traction wire rope; 9. Pulley assembly; 901. Mounting base; 902. Inclined arm; 903. Pulley; 10. First vertical slide rail; 11. Servo motor; 12. Lead screw; 13. Lead screw sleeve; 14. Second vertical slide rail; 15. Small slider; 16. Connecting hole; 17. Connecting rod. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "middle," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example 1

[0031] like Figures 1-6 As shown, a CNC machine tool head lifting counterweight mechanism includes a worktable 1, a column 2 on the worktable 1, a liftable slide 3 on one side of the column 2, a machine head 4 connected to the slide 3, a liftable counterweight box 5 on the other side of the column 2 opposite to the slide 3, and a plurality of counterweight blocks 6 inside the counterweight box 5; a plurality of lifting rings 7 are respectively provided above the counterweight box 5 and the slide 3, and the lifting rings 7 on both sides are respectively connected by traction steel wire ropes 8; a plurality of pulley assemblies 9 are provided at the upper end of the column 2, and the pulley assemblies 9 support and guide the traction steel wire ropes 8.

[0032] The counterweight mechanism for lifting the machine head of this CNC machine tool, through the setting of the counterweight box 5, can change the force on the slide 3 and the mass distribution of the entire column, so as to achieve a certain balance. This can improve the moving stability and stopping stability of the slide 3, reduce the unbalanced force and vibration caused by the operation of the machine tool, and help improve the stability and accuracy of the machining of the machine head 4. Moreover, this counterweight mechanism has a simple structure, is easy to connect and install, and its spatial arrangement is relatively reasonable, without occupying too much space on the machine tool or affecting the operation of other components.

[0033] CNC machine tools generate vibrations during machining, which can affect machining accuracy. Appropriate counterweights in the counterweight box 5 and counterweight block 6 can reduce machine tool vibration and improve machining accuracy. Simultaneously, this counterweight configuration makes the overall structure of the machine tool column more stable, reducing structural deformation caused by uneven mass distribution, thereby improving the machine tool's stability and lifespan. Due to the counterweight setup, overall vibration is reduced, structural deformation is minimized, and the machine head operates more stably, which also contributes to improved machining accuracy.

[0034] The counterweight box 5 and the slide block 3 are respectively located on the front and back sides of the column 2, and both can slide relative to the column, so that they can form a counterweight system that rises and falls, making it easier to achieve a relative balance state and making full use of the unused space on the back of the column 2.

[0035] The lifting ring 7 facilitates the connection of the traction steel wire rope 8. The pulley assembly 9 allows the traction steel wire rope 8 to better bear the force, obtain better support and guidance, and facilitate the transmission of force to achieve a balanced state.

[0036] The counterweight 6 is installed in the counterweight box 5 to facilitate the placement and removal of the counterweight 6. The number of counterweights can be adjusted according to the actual force and machine tool operating conditions, and the counterweight weight can be adjusted by adding or removing counterweights.

[0037] In this embodiment, there are two lifting rings 7 on the counterweight box 5 and the slide block 3, so that the counterweight box is connected to the slide block by two traction steel wire ropes 8. A bolt post is provided below the lifting ring 7, and the bolt post is connected to the counterweight box 5 or the slide block 3. There are four pulley assemblies 9, which are respectively set at the four corners of the upper edge of the column 2.

[0038] The counterweight box and the slide are respectively provided with anchor points (lifting rings) on both sides of the longitudinal direction. Two relatively parallel traction steel wire ropes can be arranged to connect the two at the same time. This can pull the counterweight box better and more stably, and can also make room for the area between the two traction steel wire ropes. This connection method will not affect the setting of various motors on the column and machine head, nor will it affect various wiring.

[0039] Furthermore, the pulley assembly 9 includes a mounting base 901 disposed on the upper edge of the column 2, the mounting base having a pair of outwardly extending inclined arms 902, and a pulley 903 connected between the pair of inclined arms 902 via a wheel axle, the traction steel wire rope 8 being wound around the groove of the pulley 903.

[0040] By placing the pulley assembly 9 on the edge of the column and coordinating it with the arrangement of the inclined arm 902, the pulley 903 can extend out of the column and hang outside the area where the column 2 is located. This can better guide and pull the traction steel wire rope 8, allowing the traction steel wire rope 8 to be arranged vertically to horizontally.

[0041] Specifically, several pulleys 903 are at the same support height. The traction wire rope 8 extends vertically to the pulley on the side where the slide is located, then horizontally to the pulley on the side where the counterweight box is located, and then vertically to the counterweight box. This allows for a neat arrangement of the traction wire rope, which is beneficial for force analysis and thus facilitates adjusting the weight of the counterweight according to the force conditions.

[0042] Furthermore, a pair of first vertical slide rails 10 are provided on one side of the column 2, and the slide block 3 is slidably mounted on the pair of first vertical slide rails 10. A servo motor 11 is also provided above the column 2. The servo motor 11 is connected to and drives a lead screw 12. The lead screw 12 is connected to the slide block 3 through a lead screw sleeve 13.

[0043] The servo motor 11 drives the lead screw 12 to rotate, causing the lead screw sleeve 13 to move up and down along the lead screw 12, thereby driving the slide block 3 to move up and down. The pair of first vertical slide rails 10 serve as guides and connections for installation. The other end of the lead screw 12 can also be connected to the bearing seat.

[0044] Furthermore, a pair of second vertical slide rails 14 are provided on the other side of the column 2, and a number of small sliders 15 are provided on the pair of second vertical slide rails 14, and the small sliders 15 are connected to the counterweight box 5.

[0045] The second vertical slide rail 14 and the small slider 15 facilitate the connection and installation of the counterweight box 5, and also serve as a guide, allowing the counterweight box 5 to move up and down better.

[0046] Furthermore, the counterweight box 5 includes a box body 501, one side of which is provided with an openable and closable door 502, and several layers of counterweight blocks 6 are stacked inside the box body 501, with clearance gaps provided between at least one set of vertically adjacent counterweight blocks 6.

[0047] The safety of placing the counterweight 6 inside the box is high, which can prevent it from falling. The box door 502 is located on the outside, which makes it easier to open the box door 502 to take out and put in the counterweight 6. The box door can be connected to the box body by several screws, or by hinges and latches. Several counterweights 6 are arranged in layers and rows inside the box, which is relatively neat. The gap is set to facilitate tools or hands to enter and grab the counterweights.

[0048] In this embodiment, the counterweight block in the middle is provided with the clearance gap on both sides. When placing the counterweight block, the counterweight blocks on both sides can be stacked up and placed tightly, and then the counterweight block in the middle part can be placed layer by layer. When it is necessary to reduce the counterweight, the counterweight block can be removed from the middle first. This arrangement makes it more convenient to use and operate. Example 2

[0049] The difference between this embodiment and Embodiment 1 lies in the different installation method of the counterweight.

[0050] To further improve the stability of the counterweight during machine tool operation, multiple vertical counterweights are connected together by connecting rods for positioning.

[0051] Specifically, such as Figure 7 As shown, the counterweight 6 has a through-hole 16, and the stacked counterweights 6 have a connecting rod 17 passing through the through-hole 16. The connecting rod 17 is connected to the counterweight box 5.

[0052] The connecting rods 17 and connecting holes 16 allow multiple counterweights 6 in each column to be connected in series, reducing relative movement between them. Especially during machine tool operation, vibrations and shocks will not cause the counterweights 6 to wobble or shift, ensuring stable counterweight performance. In use, after neatly stacking the counterweights 6 in the counterweight box, insert the connecting rods 17 from above into the counterweight box 5 and pass them sequentially through the vertical columns of counterweights 6.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A CNC machine tool head lifting and counterweight mechanism, comprising a worktable, wherein a column is provided on the worktable, characterized in that, One side of the column is provided with a liftable slide, and the slide is connected to and installed with a machine head. The other side of the column opposite to the slide is provided with a liftable counterweight box, and the counterweight box contains several counterweight blocks. Multiple lifting rings are provided above the counterweight box and the slide, and the lifting rings on both sides are connected by traction steel wire ropes. Multiple pulley assemblies are provided at the upper end of the column, and the pulley assemblies support and guide the traction steel wire ropes.

2. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The counterweight box and the slide have two lifting rings each, so that the counterweight box is connected to the slide via two traction steel wire ropes. A bolt post is provided below the lifting ring, and the bolt post is connected to the counterweight box or the slide.

3. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The pulley assembly consists of four parts, which are respectively located at the four corners of the upper edge of the column.

4. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The pulley assembly includes a mounting base disposed on the upper edge of the column, the mounting base having a pair of outwardly extending inclined arms, a pulley being connected between the pair of inclined arms via an axle, and the traction wire rope being connected to the pulley.

5. The CNC machine tool head lifting and counterweight mechanism according to claim 4, characterized in that, Several pulleys are at the same support height. The traction wire rope extends vertically to the pulley on the side where the slide is located, then horizontally to the pulley on the side where the counterweight box is located, and then vertically to the counterweight box.

6. The CNC machine tool head lifting counterweight mechanism according to claim 1, characterized in that, One side of the column is provided with a pair of first vertical slide rails, and the slide block is slidably mounted on the pair of first vertical slide rails. A servo motor is also provided above the column, and the servo motor is connected to and drives a lead screw. The lead screw is connected to the slide block through a lead screw sleeve.

7. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The other side of the column is provided with a pair of second vertical slide rails, and a number of small sliders are provided on the pair of second vertical slide rails. The small sliders are connected to the counterweight box.

8. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The counterweight box includes a box body, one side of which is provided with an openable and closable door. Several layers of counterweight blocks are stacked inside the box body, and at least one vertically adjacent set of counterweight blocks is provided with a clearance gap.

9. The CNC machine tool head lifting and counterweight mechanism according to claim 1, characterized in that, The counterweight block is provided with a through-hole, and the stacked counterweight blocks are provided with a connecting rod passing through the through-hole, and the connecting rod is connected to the counterweight box.

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