Screw rod supporting structure of long-axis numerical control machine tool

Abstract

The utility model relates to a lead screw supporting structure of a long-axis numerical control machine tool, and belongs to the technical field of numerical control machine tools. The threaded sleeve is arranged on the lead screw, and the supporting block moving along with the threaded sleeve is arranged on the guide rail to support the lead screw, so that drooping bending and jumping of the lead screw caused by dead weight can be effectively reduced, a more stable supporting effect is provided, the transmission precision of the lead screw is improved, the stability of a whole transmission system is ensured, and the service life of the lead screw is prolonged. The threaded sleeve moving along with the lead screw is arranged, direct contact between the lead screw and the supporting block is avoided, abrasion of the lead screw in the transmission process is reduced, and therefore the service life of the lead screw is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to numerical control machine tool technical field, concretely relates to a long axle numerical control machine tool's screw rod support structure. BACKGROUND

[0002] The transmission component of the existing numerical control machine tool mostly adopts ball screw transmission, adopts motor seat and bearing seat two point support. However, for the numerical control machine tool of stroke more than 4 meters, because the ball screw is too long, the screw rod will cause droop bending due to self weight, especially when the numerical control machine tool high speed operation, the ball screw will produce big bounce, form deflection deformation, will influence the transmission precision of screw rod, reduced the cutting performance of machine tool, therefore, at present part machine tool will adopt support component to support screw rod to reduce the bending and bounce of ball screw, improve the stability of transmission system.

[0003] However, the contact surface of the screw rod and the support structure will inevitably wear during long-term work, which not only reduces the supporting effect, causes the support structure to lose its original precision and stability, makes the screw rod produce more vibration and displacement during transmission, and further affects the precision of the whole transmission system, but also accelerates the aging of the screw rod, shortens its service life, and increases the maintenance cost. SUMMARY

[0004] In order to overcome the problem that the contact surface of the screw rod and the support structure will inevitably wear during long-term work in the background art, which not only reduces the supporting effect, causes the support structure to lose its original precision and stability, makes the screw rod produce more vibration and displacement during transmission, and further affects the precision of the whole transmission system, but also accelerates the aging of the screw rod, shortens its service life, and increases the maintenance cost, the utility model provides a screw rod support structure of long axle numerical control machine tool; by setting a threaded sleeve on the screw rod and a support block on the guide rail that moves with the threaded sleeve to support the screw rod, the droop bending and bounce of the screw rod due to self weight can be effectively reduced, a more stable supporting effect is provided, the transmission precision of the screw rod is improved, the stability of the whole transmission system is ensured, the threaded sleeve that moves with the screw rod is set, the direct contact between the screw rod and the support block is avoided, the wear of the screw rod during transmission is reduced, and the service life of the screw rod is prolonged.

[0005] To achieve the above object, the utility model is realized through the following technical scheme: a screw rod support structure of long axle numerical control machine tool mainly includes guide rail, support block, sliding block, connecting block, connecting rod, threaded sleeve, the guide rail is installed on the side wall of machine tool, two groups of sliding blocks are slidably installed on the guide rail, the connecting block is installed on each group of sliding blocks, the connecting rod is connected between the connecting blocks, the threaded sleeve is threadedly connected on the screw rod, and the support block for supporting the threaded sleeve is vertically installed on the connecting block.

[0006] The support block is provided with a Y-shaped structure, the bottom end of the support block is connected with the connecting block through a screw, one side of the support block in contact with the circumferential surface of the threaded sleeve is provided with a circular arc surface, and the top end of the support block is connected with the threaded sleeve through a screw.

[0007] The connecting rods are connected between the connecting blocks to improve the stability of the whole support structure, the ends of the connecting rods are provided with threads, the ends of the connecting rods are penetrated through the connecting blocks and are threadedly connected with the nuts abutting against the ends of the connecting blocks.

[0008] The utility model discloses beneficial effect has:

[0009] The utility model discloses a threaded sleeve is set up on the screw rod, and the support block that moves along with the threaded sleeve is set up on the guide rail and supports the screw rod, can effectively reduce the drooping bending and jumping of screw rod because of self weight, provides more stable support effect, thereby improves the transmission precision of screw rod, guarantees the stability of whole transmission system, sets up the threaded sleeve that moves along with screw rod, avoids the direct contact of screw rod and support block, reduces the abrasion of screw rod in the transmission process, thereby prolongs the service life of screw rod. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the installation state stereogram of the utility model.

[0011] Figure 2 It is Figure 1 The partial close-up view of A in the figure.

[0012] Figure 3 It is the utility model explosion map. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical scheme and beneficial effect of the utility model more clearly, below, the preferred embodiment of the utility model will be explained in detail with the drawings, to facilitate the understanding of technical personnel.

[0014] The utility model discloses a long axle numerical control machine tool's screw rod support structure, long axle numerical control machine tool's screw rod support structure mainly includes guide rail 1, support block 2, sliding block 3, connecting block 4, connecting rod 5, threaded sleeve 6, the guide rail 1 is installed on the machine tool side wall, and two groups of sliding blocks 3 are slidably installed on the guide rail 1, and the connecting block 4 is installed on each group of sliding blocks 3, and the connecting block 4 is connected through the connecting rod 5 between the connecting block 4, and the threaded sleeve 6 is threadedly connected on the screw rod, and the support block 2 for supporting the threaded sleeve 6 is vertically installed on the connecting block 4.

[0015] When the machine tool starts to work, the motor drives the screw rod to rotate, the screw rod is threadedly connected with the nut sleeve, the screw rod drives the saddle to move through the nut sleeve, simultaneously, the threaded sleeve 6 will move along the axial direction of the screw rod, the supporting block 2 moves along the guide rail 1 following the threaded sleeve 6, thereby providing stable support for the screw rod.

[0016] The supporting block 2 is provided with a Y-shaped structure, the bottom end of the supporting block 2 is connected with the connecting block 4 through a screw, one side of the supporting block 2 in contact with the circumferential surface of the threaded sleeve 6 is provided with a circular arc surface, and the top end of the supporting block 2 is connected with the threaded sleeve 6 through a screw, so that the supporting block 2 is convenient to install or disassemble.

[0017] The connecting rods 5 are connected between the connecting blocks 4 and are used for improving the stability of the whole supporting structure, the end of the connecting rod 5 is provided with a thread, the end of the connecting rod 5 penetrates through the connecting block 4 and is threadedly connected with the nut abutting against the end of the connecting block 4, the connecting rod 5 connects the connecting blocks 5 together to form a whole supporting frame, and the stability of the screw rod in the movement process is ensured.

[0018] Working process:

[0019] When the machine tool starts to work, the motor drives the screw rod to rotate, the screw rod is threadedly connected with the nut sleeve, the screw rod drives the saddle to move through the nut sleeve, simultaneously, the threaded sleeve 6 will move along the axial direction of the screw rod, the supporting block 2 moves along the guide rail 1 following the threaded sleeve 6, thereby providing stable support for the screw rod. Since the supporting block 2 moves along the guide rail 1 following the threaded sleeve 6, the sagging bending and jumping of the screw rod caused by the self weight can be effectively reduced, more stable supporting effect can be provided, the transmission precision of the screw rod is improved, simultaneously, the threaded sleeve 6 moving following the screw rod is arranged, direct contact between the screw rod and the supporting block 2 is avoided, the abrasion of the screw rod in the transmission process is reduced, and the service life of the screw rod is prolonged.

[0020] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical scheme of the utility model and not to limit, although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to the form and details without departing from the range defined by the claims of the utility model.

Claims

1. A lead screw support structure for a long axis numerically controlled machine tool, characterised in that: The long-axis numerical control machine tool's screw rod support structure includes a guide rail (1), a support block (2), a sliding block (3), a connecting block (4), and a threaded sleeve (6), the guide rail (1) is installed on the side wall of the machine tool, two groups of sliding blocks (3) are slidingly installed on the guide rail (1), the connecting block (4) is installed on each group of sliding blocks (3), the threaded sleeve (6) is threadedly connected to the screw rod, and the support block (2) for supporting the threaded sleeve (6) is vertically installed on the connecting block (4).

2. The lead screw support structure of a long axis NC machine tool according to claim 1, wherein: The support block (2) is provided in a Y-shaped structure, the bottom end of the support block (2) is connected to the connecting block (4) through a screw, one side of the support block (2) in contact with the circumferential surface of the threaded sleeve (6) is provided as a circular arc surface, and the top end of the support block (2) is connected to the threaded sleeve (6) through a screw.

3. A lead screw support structure for a long axis numerically controlled machine tool as claimed in claim 1 or 2, characterized in that: Connecting rods (5) for improving the stability of the entire support structure are connected between the connecting blocks (4), the ends of the connecting rods (5) are provided with threads, the ends of the connecting rods (5) penetrate through the connecting blocks (4) and are threadedly connected with nuts abutting against the ends of the connecting blocks (4).

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