CN215659181U - Roller screw pair for gantry numerical control machine tool - Google Patents

Abstract

The utility model relates to the technical field of numerical control machines, and particularly discloses a roller screw pair for a gantry numerical control machine, which comprises a support, a motor arranged on the support, a screw driven by the motor to rotate, a nut driven by the screw to move and a nut seat used for fixing the nut, wherein two ends of the screw are rotatably connected with the support, one side of the nut seat is detachably connected with a workbench, the other side of the nut seat is detachably connected with a fixing ring, the fixing ring is symmetrically and fixedly provided with fixing columns, the fixing columns are vertically downward and fixedly connected with sliding components at the bottom ends of the fixing columns, and the support is symmetrically provided with sliding rails capable of accommodating the sliding components to slide.

Description

Roller screw pair for gantry numerical control machine tool

Technical Field

The application relates to the technical field of numerical control machine tools, and particularly discloses a roller screw pair for a gantry numerical control machine tool.

Background

The screw rod is used as a key part for transmitting power and positioning of a numerical control machine tool, is an important guarantee for the performance of the machine tool, has the main function of converting rotary motion into linear motion or converting torque into axial repeated acting force, and has the characteristics of high precision, reversibility and high efficiency.

At present, when a ball screw pair used by a traditional numerical control machine tool is used for long-distance transmission, the length of a screw is long, so that the deflection of the screw is overlarge under the self weight, and the transmission precision is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that the deflection of a lead screw is too large under the self weight to influence the transmission precision when the traditional ball screw pair is used for long-distance transmission.

In order to achieve the purpose, the basic scheme of the utility model provides a roller screw pair for a gantry numerical control machine tool, which comprises a support, a motor arranged on the support, a screw driven by the motor to rotate, a nut driven by the screw to move and a nut seat used for fixing the nut, wherein both ends of the screw are rotatably connected with the support, one side of the nut seat is detachably connected with a workbench, the other side of the nut seat is detachably connected with a fixing ring, the fixing rings are symmetrically fixed with fixing columns, the fixing columns are vertically downward and fixedly connected with sliding components at the bottom ends of the fixing columns, and the support is symmetrically provided with slide rails capable of accommodating the sliding components to slide.

The principle and effect of this basic scheme lie in:

1. according to the utility model, the fixing ring and the fixing column are arranged, and the fixing column can support the nut seat, so that the nut and the workbench are supported, and the stability of the workbench in the moving process is improved.

2. The fixing column is arranged between the bracket and the nut seat, so that the distance between the nut seat and the bracket is kept constant, and the influence of overlarge deflection of the screw rod due to self weight on the transmission precision is prevented.

3. The sliding rail and the sliding assembly provide support for the movement of the fixed column, the fixed column slides under the driving of the nut seat, and the sliding assembly slides in the sliding rail, so that the sliding performance between the fixed column and the support is ensured, the distance between the nut seat and the support can be kept constant when the nut seat is located at any position, and meanwhile, the matching between the sliding assembly and the sliding rail can also play a role in guiding and limiting the fixed column, and further play a role in guiding and limiting the nut seat, the nut and the workbench.

4. Compared with the prior art, the nut can keep constant with the bracket support when the nut is at any position in the transmission process by arranging the fixing ring, the fixing column, the sliding assembly, the sliding rail and the like, namely, the nut is prevented from being vertically deviated due to the bending of the lead screw in the transmission process, so that the transmission precision of the lead screw nut is improved, and the problem that the transmission precision is influenced due to the overlarge deflection of the lead screw under the self weight when the traditional ball lead screw pair is used for long-distance transmission is solved.

Furthermore, the support is symmetrically and fixedly connected with guide rods in sliding connection with the workbench. The guide rod can play a role in guiding the movement of the workbench.

Furthermore, the sliding assembly comprises an arc-shaped fixing sleeve arranged at the bottom end of the fixing column and a ball capable of rolling in the fixing sleeve, and the bottom end of the ball tightly slides with the sliding rail. Through ball and slide rail contact, reduced the friction between slip subassembly and the slide rail to be convenient for the slip of fixed column.

Furthermore, the slide rail is an arc-shaped rail matched with the shape of the fixed sleeve, the side wall of the slide rail tightly slides with the fixed sleeve, and a gap exists between the bottom of the slide rail and the fixed sleeve. A gap exists between the bottom of the sliding rail and the fixed sleeve, and friction between the sliding assembly and the sliding rail is further reduced.

Furthermore, one side of the nut seat close to the fixed ring can be detachably connected with a check ring used for fixing the fixed ring. The retaining ring is used for fixing the position of the fixing ring in the installation and use processes.

Further, the fixed ring is in key connection with the nut seat, and the check ring is in bolt connection with the nut seat. This mode is convenient for to the installation and the dismantlement of solid fixed ring and retaining ring.

Furthermore, the nut seat is symmetrically provided with key grooves, and the fixing ring and the retaining ring are both provided with connecting keys matched with the key grooves. The connecting key is matched with the key groove, so that the position of the fixed ring island and the nut seat can be relatively fixed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 shows a bearing diagram of a roller screw pair for a gantry numerical control machine tool according to an embodiment of the present application;

FIG. 2 is an enlarged view of a part A in FIG. 1 showing a roller screw pair for a numerical control gantry machine tool according to an embodiment of the present application;

FIG. 3 is a top view of a roller screw pair for a gantry numerical control machine according to an embodiment of the present application;

fig. 4 shows a cross section a-a in fig. 3 of a roller screw pair for a gantry numerical control machine tool according to an embodiment of the present application.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Reference numerals in the drawings of the specification include: the device comprises a support 1, a motor 2, a coupler 3, a lead screw 4, a guide rod 5, a nut 6, a nut seat 7, a workbench 8, a fixing ring 9, a retainer ring 10, a slide rail 11, a fixing column 12, a fixing sleeve 13 and balls 14.

A roller screw pair for a gantry numerical control machine tool is disclosed, and the embodiment is shown in figures 1 to 3: including support 1, locate motor 2 on support 1, by motor 2 drive pivoted lead screw 4, nut seat 7 by nut 6 of lead screw 4 drive removal and being used for fixation nut 6, connection workstation 8 can be dismantled to nut seat 7 one side, 1 left and right sides symmetry rigid coupling of support has two can with workstation 8 sliding connection's guide arm 5, it is specific, 1 bottom of support is fixed with lathe or ground, prevent that support 1 is crooked itself, motor 2 adopts step motor 2 or servo motor 2, motor 2's output shaft passes through shaft coupling 3 and is fixed with lead screw 4, nut seat 7 installs workstation 8 through ten construction bolts.

The both ends of lead screw 4 all rotate with support 1 and are connected, 7 opposite sides of nut seat can be dismantled and be connected with solid fixed ring 9, it is concrete, gu fixed ring 9 and the 7 key-type connections of nut seat, nut seat 7 still bolted connection have a retaining ring 10 that is used for solid fixed ring 9, the symmetry is equipped with four keyways on the nut seat 7, gu all be equipped with four on fixed ring 9 and the retaining ring 10 with the key connection of keyway adaptation, gu fixed ring 9 symmetry is fixed with fixed column 12, the equal vertical downward of fixed column 12 has the slip subassembly at its bottom rigid coupling, the symmetry is equipped with the gliding slide rail 11 of holding the slip subassembly on the support 1.

In the embodiment shown in fig. 4, the sliding assembly includes an arc-shaped fixing sleeve 13 disposed at the bottom end of the fixing column 12 and a ball 14 capable of rolling in the fixing sleeve 13, the sliding rail 11 is an arc-shaped rail adapted to the shape of the fixing sleeve 13, the side wall of the sliding rail 11 tightly slides with the fixing sleeve 13, a gap exists between the bottom of the sliding rail 11 and the fixing sleeve 13, and the bottom end of the ball 14 tightly slides with the sliding rail 11.

In the implementation process of the utility model, the parts are firstly installed, the screw 4 is fixed with the free end of the output shaft of the motor 2 through the coupler 3, then the connecting key on the fixing ring 9 slides into the key slot corresponding to the nut seat 7, the fixing sleeve 13 and the ball 14 are respectively positioned in the slide rails 11 on the left side and the right side until the connecting key is completely positioned at the bottom end of the key slot, then the connecting key of the retainer ring 10 slides into the slide slot corresponding to the nut seat 7 until the connecting key is completely abutted against the connecting key of the fixing ring 9, namely, the axial sliding of the fixing ring 9 is limited by the connecting key of the retainer ring 10, and in this state, the retainer ring 10 and the nut seat 7 are fixed through the bolt, namely, the fixing ring 9 can be installed, and finally the workbench 8 and the nut seat 7 are fixed and can slide with the guide rail.

After the installation is completed, motor 2 drives lead screw 4 to rotate, lead screw 4 drives nut 6, nut seat 7 and workstation 8 slide, nut seat 7 drives solid fixed ring 9 to slide, gu fixed ring 9 drives fixed column 12, gu fixed cover 13 and ball 14 slide, ball 14 slides with fixed cover 13 in slide rail 11, support nut seat 7 simultaneously, when crooked deformation appears in lead screw 4, the vertical position of nut seat 7 is injectd by fixed column 12, gu fixed ring 9, make the distance of nut seat 7 and 1 bottom surface of support keep invariable, can prevent that the crooked transmission precision that influences workstation 8 of lead screw 4.

Compared with the prior art, the nut 6 can keep constant with the bracket 1 of the bracket 1 when the nut 6 is at any position in the transmission process by arranging the fixing ring 9, the fixing column 12, the sliding component, the sliding rail 11 and the like, namely, the nut 6 is prevented from vertically deviating due to the bending of the lead screw 4 in the transmission process, so that the transmission precision of the lead screw 4 and the nut 6 of the lead screw 4 is improved, and the problem that the transmission precision is influenced by the overlarge deflection of the lead screw 4 due to self weight when the traditional ball 14 lead screw 4 pair is in long-distance transmission is solved.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (7)

1. The utility model provides a roller screw pair for gantry numerical control machine, its characterized in that: including the support, locate the motor on the support, by motor drive pivoted lead screw, by the nut of lead screw drive removal with be used for fixation nut's nut seat, the both ends of lead screw all are connected with the leg joint with the support rotation, connection workstation can be dismantled to nut seat one side, nut seat opposite side can be dismantled and be connected with solid fixed ring, gu fixed ring symmetry is fixed with the fixed column, the equal vertical downwards of fixed column has the slip subassembly at its bottom rigid coupling, the symmetry is equipped with the gliding slide rail of holding the slip subassembly on the support.

2. The roller screw pair for gantry numerical control machine tool according to claim 1, wherein the brackets are symmetrically and fixedly connected with guide rods which are slidably connected with the worktable.

3. The roller screw assembly of claim 1, wherein the sliding assembly comprises an arc-shaped fixing sleeve provided at a bottom end of the fixing column and a ball rolling in the fixing sleeve, and a bottom end of the ball slides tightly with the slide rail.

4. The roller screw assembly of claim 3, wherein the slide rail is an arc rail adapted to the shape of the fixing sheath, the side wall of the slide rail slides tightly with the fixing sheath, and there is a gap between the bottom of the slide rail and the fixing sheath.

5. The roller screw pair for the gantry numerical control machine tool according to claim 1, wherein a retainer ring for fixing the fixing ring is detachably connected to one side of the nut seat close to the fixing ring.

6. The roller screw pair for gantry numerical control machine tool according to claim 5, wherein the fixed ring is in key connection with the nut seat, and the retainer ring is in bolt connection with the nut seat.

7. The roller screw pair for gantry numerical control machine tools according to claim 6, wherein key grooves are symmetrically formed in the nut seat, and connecting keys matched with the key grooves are formed in the fixing ring and the retaining ring.

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