Side hanging type gear and rack transmission device and machine tool

Abstract

The utility model discloses a side hanging type gear rack transmission device and a machine tool, which comprise a machine tool body, a main shaft box, a stand column sliding seat, a stand column, a transmission assembly and a driving assembly, the main shaft box and the stand column sliding seat are arranged, the stand column is arranged above the machine tool body, and the stand column is arranged above the stand column sliding seat and fixedly connected with the stand column sliding seat. The transmission assembly comprises a rack and a feeding box, the lathe bed is provided with a guide rail in the length direction, the rack extends in the direction of the guide rail and is installed on the side face of the lathe bed, the feeding box is located on the side face of the lathe bed, the feeding box is fixedly connected with the stand column sliding base, and the feeding box comprises a transmission gear. The transmission gear is meshed with the rack, and the driving assembly drives the feeding box to move in the guide rail direction. The feeding box moves in the horizontal direction, the spindle box vertically moves in the vertical direction, the feeding box and the spindle box do not overlap in the vertical direction, zero position setting of the spindle box is not affected by the feeding box, and the zero position of the spindle box can be lowered to a reasonable position according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding mechanisms of numerically controlled machine tools, in particular to a side-mounted rack and pinion transmission device and a machine tool. Background Art

[0002] CNC floor-type milling and boring machine is a general-purpose processing equipment with a wide processing range, high processing precision, high processing efficiency and high metal removal rate. It is widely used in engineering machinery, mining machinery, chemical machinery, energy, shipbuilding, aerospace and other processing fields. Due to the large column movement stroke of the floor-type boring machine, a servo motor is usually used to drive the gear rack transmission structure.

[0003] At present, the electrical backlash elimination structure with dual motor gear rack drive is adopted. Two sets of dual motor gear mechanisms are installed above the slide, one set is installed on the back of the column slide, and the other set is installed on the front of the column slide (directly below the spindle box). This structure is simple in structure, easy to install, and easy to adjust the backlash elimination method. The disadvantage is that one set of the drive mechanism composed of a motor, a reducer and a gear is located directly below the spindle box, and the axis direction of the drive mechanism is in the vertical direction. When the spindle box moves vertically at a low position, it will overlap with the drive mechanism. When the cross section of the column remains unchanged, the height of the column is increased, and the rigidity of the column will be weakened when the spindle box is processed at a high position of the column, which will affect the processing performance and increase the manufacturing cost of the machine tool. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to realize a side-mounted rack and pinion transmission device and a machine tool which can avoid the overlap of the main spindle box and the feed box in the vertical direction.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A side-mounted gear rack transmission device includes a bed and a spindle box, and also includes a column slide, a column, a transmission assembly and a drive assembly. The spindle box and the column slide are located above the bed, the column is located above the column slide and is fixedly connected to the column slide, the spindle box is slidably connected to the column and moves vertically along the column, and the transmission assembly includes a rack and a feed box. The bed is provided with a guide rail along the length direction, the column slide is slidably connected to the guide rail, the rack extends along the guide rail direction and is installed on the side of the bed, the feed box is located on the side of the bed, the feed box is fixedly connected to the column slide, the feed box includes a transmission gear, the transmission gear and the rack are meshed with each other, and the drive assembly drives the feed box to move along the guide rail direction.

[0007] Preferably, the plane where the column is located is perpendicular to the plane where the column slide is located.

[0008] Preferably, the feed box further comprises a box body and a pressing block, the end of the box body is provided with an inclined surface, and the pressing block cooperates with the inclined surface to press and fix the box body.

[0009] Preferably, the feed box further includes a planetary reducer, and the transmission gear is connected to an output end of the planetary reducer.

[0010] Preferably, the feed box further comprises a connecting plate, and the planetary reducer is fixedly connected to the box body via the connecting plate.

[0011] Preferably, the feed box further comprises a shaft, a bearing, a retaining ring and a lubricating gear, and the shaft, the bearing, the retaining ring and the lubricating gear are integrally assembled and fixedly connected to the box body.

[0012] Preferably, the column slide and the connecting plate are respectively connected to the box body through drilled and hinged positioning pins.

[0013] Preferably, the drive assembly is fixedly connected to the connecting plate.

[0014] Preferably, the driving assembly is a servo motor.

[0015] A machine tool comprises the side-mounted rack and pinion transmission device.

[0016] Compared with the prior art, the side-mounted rack and pinion transmission device and machine tool of the utility model have the following advantages:

[0017] (1) In the side-mounted rack and pinion transmission device and machine tool of the present application, the feed box is located on the side of the column slide, and the feed box moves along the direction of the bed guide rail. The spindle box is located above the column slide, and the spindle box moves vertically in the vertical direction. The two do not overlap in the vertical direction. The zero position setting of the spindle box is not affected by the feed box, and the zero position of the spindle box can be lowered to a reasonable position as needed;

[0018] (2) In the side-mounted rack and pinion transmission device and machine tool of the present application, the rack is mounted on the rear side of the bed, with the tooth surface facing downward, which can prevent iron filings or other impurities from falling on the tooth surface to affect the transmission accuracy or damage the tooth surface;

[0019] (3) The side-mounted rack and pinion transmission device and machine tool of the present application, through the meshing of the transmission gear and the rack inside the feed box, convert the rotation of the transmission gear into the linear motion of the column slide and its upper spindle box along the guide rail direction of the bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the side-mounted rack and pinion transmission device and the machine tool of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the side-mounted rack and pinion transmission device and the feed box of the machine tool of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the side-mounted rack and pinion transmission device of the utility model and the feed box of the machine tool from another perspective.

[0023] In the figure: 10, bed; 101, guide rail; 20, spindle box; 30, column; 40, column slide; 50, transmission assembly; 51, feed box; 511, box body; 512, pressure block; 513, screw; 514, pad; 515, transmission gear; 516, lubrication assembly; 5161, lubrication gear; 5162, shaft; 5163, retaining ring; 5164, bearing; 517, connecting plate; 518, locating pin; 519, planetary reducer; 520, interface; 521, drive assembly; 52, rack. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component through which it is fixed. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] Figure 1 to Figure 3The utility model discloses a side-mounted rack and pinion transmission device and a machine tool, wherein the side-mounted rack and pinion transmission device comprises a bed 10, a spindle box 20, a column 30, a column slide 40 and a transmission assembly 50, wherein the transmission assembly 50 comprises a feed box 51 and a rack 52, the bed 10 is provided with a guide rail 101 along the length direction, the rack 52 extends along the direction of the guide rail 101 of the bed 10 and is installed on the rear side of the bed 10, the front side of the bed 10 is provided with a guide rail 101, the column 30 and the column slide 40 are located above the bed 10, the column slide 40 is slidably connected to the guide rail 101, the spindle box 20 is fixedly connected to the column slide 40 through the column 30, and the feed box 51 is located on the side of the bed 10.

[0028] Specifically, the plane where the feed box 51 is located is perpendicular to the plane where the spindle box 20 is located.

[0029] The feed box 51 includes a box body 511, a pressing block 512, a screw 513, a pad 514, a transmission gear 515, a lubrication assembly 516, a connecting plate 517, a positioning pin 518, a planetary reducer 519, an interface 520 and a driving assembly 521. The end of the box body 511 has an inclined surface, and the pressing block 512 matching the inclined surface presses and fixes it on the column slide 40, and the transmission gear 515 and the planetary reducer 519 are connected as a whole by screws 513. In some other embodiments, the transmission gear 515 is directly welded to the output end of the planetary reducer 519 by a professional reducer manufacturer.

[0030] Specifically, the planetary reducer 519 is fixedly connected to the housing 511 via a connecting plate 517 .

[0031] Specifically, the driving assembly 521 is fixedly connected to the connecting plate 517 .

[0032] Specifically, the feed box 51 is installed and fixed on the rear bottom surface of the column slide 40, and the transmission gear 515 inside the feed box 51 is meshed with the rack 52, thereby converting the rotation of the transmission gear 515 into a linear motion of the column slide 40 and the spindle box 20 attached to its upper part along the guide rail 101 of the bed 10.

[0033] Specifically, the planetary reducer 519 with the transmission gear 515 is connected to the connecting plate 517 by screws 513, and then the connecting plate 517 is connected to the box body 511 by screws 513 (the screws 513 should not be locked too tightly at this time to facilitate the adjustment of the gap later).

[0034] The lubrication assembly 516 includes a lubrication gear 5161 , a shaft 5162 , a retaining ring 5163 and a bearing 5164 . The lubrication gear 5161 , the shaft 5162 , the retaining ring 5163 and the bearing 5164 are first assembled into one and then fixed to the box body 511 .

[0035] Specifically, the box body 511 is fixedly connected to the column slide 40. In some embodiments, the box body 511 is connected to the column slide 40 by screws 513.

[0036] The screws 513 fix the entire box body 511 to the bottom surface of the column slide 40 (the pad 514 is not installed first). By adjusting the tightening state of the screws 513, the transmission gear 515 of the feed box 51 is meshed with the rack 52. At this time, the relative gap between the feed box 51 and the bottom surface of the column slide 40 is measured, and the thickness of the pad 514 is matched according to the gap. The pad 514 is installed and the screws 513 are locked.

[0037] Adjust the vertical position of the connecting plate 517 by adjusting the screw 513, and then slightly adjust the gap between the transmission gear 515 and the rack 52 until the meshing contact between the two is good, then tighten the screw 513, and provide a drilled hinge positioning pin 518 between the connecting plate 517 and the box 511, and lock the drilled hinge positioning pin 518. Provide a drilled hinge positioning pin hole between the column slide 40 and the box 511, and lock the positioning pin 518. Use the pressing block 512 to press the box 511 through the screw 513 to ensure the stability of the box 511 during movement, and finally install the drive assembly 521. Connect lubricating oil at the interface 520, and achieve lubrication between the transmission gear 515 and the rack 52 by meshing the lubricating gear 5161 with the rack 52.

[0038] Specifically, the tooth surface of the rack 52 is downward, which can prevent iron filings or other impurities from falling on the tooth surface, affecting the transmission accuracy or damaging the tooth surface.

[0039] When assembling the side-mounted rack and pinion transmission device and the machine tool of the present application, the planetary reducer 519 with the transmission gear 515 is connected to the connecting plate 517 with screws 513, and then the connecting plate 517 is connected to the box body 511 with screws 513 (the screws 513 should not be locked too tightly at this time, so as to adjust the gap later); the lubrication gear 5161, the shaft 5162, the retaining ring 5163, and the bearing 5164 are first assembled into one and then fixed to the box body 511; then the whole set of box body 511 is installed and fixed to the bottom surface of the column slide 40 with screws 513 (the pad 514 is not installed first), and the adjustment is performed. The tightening state of the joint screw 513 makes the transmission gear 515 of the feed box 51 mesh with the rack 52. At this time, the relative gap between the feed box 51 and the bottom surface of the column slide 40 is measured, and the thickness of the pad 514 is matched according to the gap, the pad 514 is installed, and the screw 513 is locked; the position of the connecting plate 517 in the vertical direction is adjusted by adjusting the screw 513, and then the gap between the transmission gear 515 and the rack 52 is slightly adjusted until the meshing contact between the two is good, and then the screw 513 is locked, and the drilled hinge positioning pin 518 is matched between the connecting plate 517 and the box body 511, and the drilled hinge positioning pin 518 is locked. The drilled hinge positioning pin hole is matched between the column slide 40 and the box body 511, and the positioning pin 518 is locked. The box body 511 is pressed by the pressing block 512 through the screw 513 to ensure the stability of the box body 511 during the movement, and finally the drive assembly 521 is installed. Lubricating oil is connected at the interface 520 , and lubrication between the transmission gear 515 and the rack 52 is achieved through the meshing of the lubricating gear 5161 and the rack 52 ; the feed box 51 is installed and fixed on the rear bottom surface of the column slide 40 .

[0040] When the side-mounted rack and pinion transmission device and machine tool of the present application are in use, the transmission gear 515 inside the feed box 51 is meshed with the rack 52, thereby converting the rotation of the transmission gear 515 into a linear motion of the column slide 40 and the spindle box 20 fixed on its upper part along the guide rail 101 of the bed 10. The side-mounted rack and pinion transmission device and machine tool of the present application, the feed box 51 is located on the side of the column slide 40, the feed box 51 moves along the guide rail 101 of the bed 10, the spindle box 20 is located above the column slide 40, the spindle box 20 moves vertically in the vertical direction, the two do not overlap in the vertical direction, the zero position setting of the spindle box 20 is not affected by the feed box 51, and the zero position of the spindle box 20 can be lowered to a reasonable position as needed; the rack 52 is installed on the rear side of the bed 10, with the tooth surface facing downward, which can prevent iron filings or other impurities from falling on the tooth surface to affect the transmission accuracy or damage the tooth surface; the transmission gear 515 inside the feed box 51 is meshed with the rack 52, and the rotation of the transmission gear 515 is converted into a linear motion of the column slide 40 and its upper spindle box 20 along the guide rail 101 of the bed 10.

[0041] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several modifications and improvements can be made, which are equivalent modifications and improvements made to the above embodiments based on the essential technology of the utility model, and all of them belong to the protection scope of the utility model.

Claims

1. A side-mounted rack and pinion transmission device, comprising a bed and a spindle box, characterized in that: It also includes a column slide, a column, a transmission assembly and a drive assembly, the spindle box and the column slide are located above the bed, the column is located above the column slide and is fixedly connected to the column slide, the spindle box is slidably connected to the column and moves vertically along the column, the transmission assembly includes a rack and a feed box, the bed is provided with a guide rail along the length direction, the column slide is slidably connected to the guide rail, the rack extends along the guide rail direction and is installed on the side of the bed, the feed box is located on the side of the bed, the feed box is fixedly connected to the column slide, the feed box includes a transmission gear, the transmission gear and the rack are meshed with each other, and the drive assembly drives the feed box to move along the guide rail direction.

2. The side-mounted rack and pinion transmission device according to claim 1, characterized in that: The plane where the column is located is perpendicular to the plane where the column slide seat is located.

3. The side-mounted rack and pinion transmission device according to claim 1, characterized in that: The feed box also includes a box body and a pressing block. The end of the box body is provided with an inclined surface, and the pressing block cooperates with the inclined surface to press and fix the box body.

4. The side-mounted rack and pinion transmission device according to claim 3, characterized in that: The feed box also includes a planetary reducer, and the transmission gear is connected to the output end of the planetary reducer.

5. The side-mounted rack and pinion transmission device according to claim 4, characterized in that: The feed box also includes a connecting plate, and the planetary reducer is fixedly connected to the box body via the connecting plate.

6. The side-mounted rack and pinion transmission device according to claim 3, characterized in that: The feed box also includes a shaft, a bearing, a retaining ring and a lubricating gear. The shaft, the bearing, the retaining ring and the lubricating gear are integrally assembled and fixedly connected to the box body.

7. The side-mounted rack and pinion transmission device according to claim 5, characterized in that: The column slide and the connecting plate are respectively connected to the box body through drilled hinge positioning pins.

8. The side-mounted rack and pinion transmission device according to claim 5, characterized in that: The driving assembly is fixedly connected to the connecting plate.

9. The side-mounted rack and pinion transmission device according to claim 1, characterized in that: The driving component is a servo motor.

10. A machine tool, characterized in that: It comprises a side-mounted rack and pinion transmission device as described in any one of claims 1-9.

Images