Longitudinal transmission structure of high-precision numerical control lathe

Abstract

The utility model discloses a longitudinal transmission structure of a high-precision numerical control lathe. The motor mounting plate is mounted on the motor bracket and is used for mounting the motor; the motor adjusting block is mounted on the motor bracket and is used for adjusting the position of the motor mounting plate; and the adjusting bolt is mounted on the motor adjusting block and is used for pulling and jacking the motor mounting plate to adjust the tightness of the synchronous belt. By adopting a longitudinal transmission mode, the length of the whole transmission device is effectively shortened, the length of the whole transmission device occupied in a machine tool is reduced, and the size of the machine tool can be effectively reduced, so that the occupied area of the machine tool can be reduced, and the cost is saved; and through the arrangement of the pre-stretching structure, the lead screw is pre-stretched during installation, and the situation that the transmission and positioning precision is affected and the precision of a machined product is finally affected due to thermal expansion in the using process is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to numerical control lathe transmission structure, specifically point to a kind of high-precision numerical control lathe longitudinal transmission structure. BACKGROUND

[0002] The feeding device in prior art machine tool is basically composed of drag plate, motor, screw rod and other transmission parts, the screw rod is rotated by the motor, and the screw rod drives another drag plate or other device to move through the nut seat movably installed on the screw rod; the motor and the screw rod in prior art are basically in the same straight line, and the two are connected by coupling for transmission, but the transmission mode has the defect that the overall length is relatively long, which leads to the requirement of large space for the machine tool, so that the machine tool needs to be made larger, occupies large space, and has large floor area and high cost.

[0003] Moreover, the screw rod will heat up during working, and the heat will cause the ball screw to expand, thereby increasing the lead, affecting the transmission and positioning accuracy, and further affecting the precision of the processed product. Therefore, a high-precision numerical control lathe longitudinal transmission structure is proposed. SUMMARY

[0004] The utility model discloses a kind of high-precision numerical control lathe longitudinal transmission structures to solve the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme a kind of high-precision numerical control lathe longitudinal transmission structure, including drag plate, motor bracket installed on the drag plate, motor on the motor bracket, screw rod on the drag plate and motor transmission connection, expansion sleeve installed on the motor and screw rod, synchronous pulley installed on the motor and screw rod by expansion sleeve and synchronous belt installed on the synchronous pulley;Its characterized in that further include the motor mounting plate for installing motor installed on the motor bracket, the motor adjusting block for adjusting the position of motor mounting plate installed on the motor bracket and the adjusting bolt for adjusting the tightness of synchronous belt by pulling and jacking to the motor mounting plate installed on the motor adjusting block.

[0006] Further preferably, it further includes a plurality of guide screws installed on the motor bracket for guiding and limiting the movement of the motor mounting plate.

[0007] Further preferably, it further includes a bearing seat and a bearing sleeve installed on the drag plate, and a bearing connected with the screw rod and serving as a support for the screw rod installed on the bearing seat and the bearing sleeve.

[0008] Further preferably, it further includes a bearing gland installed on the bearing seat or the bearing sleeve, a spacer movably installed on the screw rod and located on one side of the screw rod, and a plurality of locking nuts installed on the screw rod and located on both sides of the bearing seat for pre-stretching the screw rod.

[0009] Further preferably, the process opening is arranged on the motor support to facilitate pre-stretching adjustment.

[0010] The beneficial effects of the utility model are: by adopting the longitudinal transmission mode, the length of the whole transmission device is effectively shortened, the length of the machine tool is reduced, the volume of the machine tool can be effectively reduced, and the floor area of the machine tool can be reduced.

[0011] By arranging the pre-stretching structure, the screw rod is pre-stretched during installation, so that the transmission and positioning accuracy are not affected by thermal expansion during use, and the accuracy of the machined product is ultimately affected. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the utility model;

[0013] Figure 2 is another perspective structural schematic diagram of the utility model;

[0014] Figure 3 is a cross-sectional structural schematic diagram of the utility model;

[0015] Figure 4 is a local enlarged structural schematic diagram of the utility model.

[0016] Legend: 1, apron; 2, motor support; 3, motor; 4, screw rod; 5, expansion sleeve; 6, synchronous pulley; 7, synchronous belt; 8, motor mounting plate; 9, motor adjusting block; 10, adjusting bolt; 11, guide screw; 12, bearing seat; 13, bearing sleeve; 14, bearing; 15, bearing gland; 16, lock nut; 17, process opening; 18, spacer sleeve. DETAILED DESCRIPTION

[0017] Now we will further illustrate the structure of the longitudinal transmission of the high-precision numerical control lathe according to the utility model in combination with the drawings.

[0018] It should be noted that all directional indications in the embodiments of the utility model, such as up, down, left, right, front, back, etc., are used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings, if the specific posture changes, the directional indications will also change accordingly.

[0019] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be understood broadly;For example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication or the interaction relation of two elements, unless another definite limitation.For the ordinary skilled person in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] Referring to Figures 1-4 The utility model discloses a high-precision numerical control lathe longitudinal transmission structure, including the drag board 1, install the motor support 2 on the drag board 1, place the motor 3 on the motor support 2, place the screw rod 4 on the drag board 1 with the transmission connection of motor 3, install the expansion sleeve 5 on the motor 3 and screw rod 4, install the synchronous pulley 6 on the motor 3 and screw rod 4 through expansion sleeve 5 and install the synchronous belt 7 on the synchronous pulley 6;Its characterized in that still include the motor mounting plate 8 for installing motor 3 installed on the motor support 2, the motor adjusting block 9 for adjusting the position of motor mounting plate 8 installed on the motor support 2 and the adjusting bolt 10 for adjusting the motor mounting plate 8 and adjusting the tightness of synchronous belt 7 with one pull and one top of the motor adjusting block 9;

[0021] By adopting the longitudinal transmission mode, the length of the whole transmission device is effectively shortened, the length of the whole machine tool is reduced, the volume of the machine tool can be effectively reduced, so that the floor area of the machine tool can be reduced;

[0022] Through the setting of motor adjusting block 9 and two adjusting bolts 10, when adjusting the position of motor 3 mounting block, the two adjusting bolts 10 are pulled and topped, one adjusting bolt 10 is connected with motor adjusting block 9 through threads and the end is connected with motor mounting plate 8, for jacking motor mounting plate 8;The other adjusting bolt 10 is connected with motor adjusting block 9 through sliding and one end is connected with motor mounting plate 8 through threads, for pulling motor mounting plate 8.

[0023] In one embodiment, it also includes several guide screws 11 installed on the motor support 2 for guiding and limiting the movement of the motor mounting plate 8;Through the setting of several guide screws 11, the installation position and movement of the motor mounting plate 8 are limited and guided, so that the position change during movement is avoided, and the working state of the synchronous belt 7 is affected.

[0024] In one embodiment, it also includes bearing seat 12 and bearing sleeve 13 installed on the drag board 1 and bearing 14 connected with screw rod 4 and supporting screw rod 4 installed on bearing seat 12 and bearing sleeve 13;Through the setting of bearing 14, screw rod 4 is connected movably;

[0025] In one embodiment, further comprising a bearing gland 15 mounted on the bearing seat 12 or the bearing sleeve 13, a spacer sleeve 18 movably mounted on the lead screw 4 and located on one side of the lead screw 4, and a plurality of lock nuts 16 mounted on the lead screw 4 and located on both sides of the bearing seat 12 to pre-stretch the lead screw 4;

[0026] By mounting the lock nuts 16 on both sides of the bearing seat 12, and by rotating the lock nuts 16 on both sides, one end is abutted and the other end is stretched, the lead screw 4 is pre-stretched, avoiding the influence of transmission and positioning accuracy due to thermal expansion during work, and further affecting the accuracy of the processed product.

[0027] In one embodiment, further comprising a process opening 17 provided on the motor bracket 2 to facilitate pre-stretching adjustment; through the provision of the process opening 17, the worker can use a tool to rotate the lock nut 16 through the process opening 17 to pre-stretch the lead screw 4, avoiding interference caused by the motor bracket 2.

[0028] The utility model discloses in the installation process,

[0029] When pre-stretching the lead screw 4, the lead screw 4 is movably mounted in the bearing seat 12 and the bearing sleeve 13, then the lock nut 16 mounted on the lead screw 4 and located on one side of the bearing seat 12 is tightened to tightly abut the spacer sleeve 18 on this side, then the lock nut 16 located on the other side of the bearing seat 12 is rotated, and in the rotating process, the lock nut 16 contacts and continuously rotates the spacer sleeve 18 on this side, and in the rotating process, the lead screw 4 is pre-stretched, and after the pre-stretching is completed, the rotation of the lock nut 16 is stopped, and then the synchronous pulley 6 is mounted on the lead screw 4.

[0030] When adjusting the tightness of the synchronous belt 7: first, the motor mounting plate 8 provided with the motor 3 is preliminarily mounted on the motor bracket 2 by bolts but is not tightened, then the synchronous pulley 6 is mounted on the output shaft of the motor 3, the synchronous belt 7 is mounted on the two synchronous pulleys 6, then the position of the motor mounting plate 8 is adjusted by rotating the adjusting screw, one pull and one top, so that the motor mounting plate 8 moves along the guide bolt, until the tightness of the synchronous belt 7 is adjusted, then the bolts fixing the motor mounting plate 8 and the motor bracket 2 are tightened.

[0031] The protection scope of the utility model is not limited to the above embodiments and their transformations. The routine modifications and replacements made by the skilled in the art based on the content of the embodiments all belong to the protection scope of the utility model.

Claims

1. A high-precision numerical control lathe longitudinal transmission structure, comprising a drag plate (1), a motor support (2) installed on the drag plate (1), a motor (3) placed on the motor support (2), a lead screw (4) placed on the drag plate (1) and in transmission connection with the motor (3), an expansion sleeve (5) installed on the motor (3) and the lead screw (4), a synchronous pulley (6) installed on the motor (3) and the lead screw (4) through the expansion sleeve (5), and a synchronous belt (7) installed on the synchronous pulley (6); characterized in that It also includes a motor mounting plate (8) installed on the motor support (2) for mounting the motor (3), a motor adjusting block (9) installed on the motor support (2) for adjusting the position of the motor mounting plate (8), and an adjusting bolt (10) installed on the motor adjusting block (9) for adjusting the tightness of the synchronous belt (7) by pulling and supporting the motor mounting plate (8).

2. The longitudinal transmission structure of a high-precision numerical control lathe according to claim 1, characterized in that: It also includes a number of guide screws (11) installed on the motor support (2) to guide and limit the movement of the motor mounting plate (8).

3. The longitudinal transmission structure of a high-precision numerical control lathe according to claim 1, characterized in that: It also includes a bearing seat (12) and a bearing sleeve (13) installed on the drag plate (1), and a bearing (14) connected with the lead screw (4) and supporting the lead screw (4) installed on the bearing seat (12) and the bearing sleeve (13).

4. The longitudinal transmission structure of a high-precision numerical control lathe according to claim 3, characterized in that: It also includes a bearing pressing cover (15) installed on the bearing seat (12) or the bearing sleeve (13), a movable spacer (18) installed on the lead screw (4) and located on one side of the lead screw (4), and a number of locking nuts (16) installed on the lead screw (4) and located on both sides of the bearing seat (12) to pre-stretch the lead screw (4).

5. The longitudinal transmission structure of a high-precision numerical control lathe according to claim 4, characterized in that: It also includes a process opening (17) provided on the motor support (2) for easy pre-stretching adjustment.

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