TWM615922U - Counterweight mechanism of Z-axis head linear track - Google Patents

Abstract

This creation provides a Z-axis head linear rail counterweight mechanism, which includes a head seat, a head, and a weight cylinder. The head seat is generally in the shape of a rectangular shell with open upper and lower ends. A plurality of sliders, the head system is movably arranged in the rail groove, including a head body and four linear rails, the head system is provided with a main shaft and connected to a screw of the machine tool, and each linear rail system is provided Connect the sliders to the four corners of the head body so that the head can move along the Z-axis direction on the head base. The weight cylinder extends along the Z-axis direction and is located between the head body and the saddle side. The heads are connected between them; thereby, the screw, the main shaft and the counterweight cylinder are located on the same axis.

Description

Z-axis head linear rail counterweight mechanism

This creation is related to the head mechanism of the machine tool, more specifically, it refers to a Z-axis head linear rail counterweight mechanism.

Press, the beam of the gantry processing machine is provided with a spindle head. The spindle head includes a saddle that can move along the X axis. A head that can move along the Z axis is arranged on the outside of the saddle. One of the spindles for cutting and processing.

In the early days, the head of the spindle head was embedded on the outside of the saddle with a chute. Only one side of the head was connected with the saddle, and the structural rigidity was insufficient. When the spindle was cutting and processing, the head would bear the cutting reaction force transmitted by the spindle and The related torque causes the head to vibrate easily during the processing, and even creates a gap between the head and the saddle, which seriously affects the processing accuracy.

For this reason, as shown in the Republic of China No. M282769 "Machine machine spindle head moving up and down strong structure" new patent and No. I264343 "Machining center machine Z-axis head" as shown in the invention patent, the saddle is designed to have a U-shaped cross section. The shape of the shape, and on its outer side (the side of the saddle connecting beam is the inner side) is formed a concave space to accommodate the head, and the head uses the plural line rails and the concave space The sliding block set on the inner side of the room is engaged. Based on this, the overall rigidity of the saddle and the head can be strengthened, and the machining ability and accuracy of the Z-axis long-travel overhang cutting can be improved.

However, in the aforementioned two patents, the screw that drives the head to move and the motor that drives the screw are arranged between the head and the saddle, and the main shaft is relatively located outside the screw and has a distance from the saddle. This distance is equal to Because the distance cannot be changed for the moment arm that generates a moment on the saddle during spindle cutting, the greater the cutting reaction force during spindle machining, the greater the moment acting on the saddle. In this way, even if the aforementioned two The overall rigidity of the patented saddle and head has been improved, but the torque generated during the machining process cannot be reduced, which will result in the machining capacity and accuracy no longer being improved.

The reason is that the creators created this "Z-axis head linear rail counterweight mechanism" based on years of experience in R&D and manufacturing in this industry, which can indeed improve the above-mentioned shortcomings.

The main purpose of this creation is to provide a Z-axis head linear rail counterweight mechanism, which shortens the distance between the main shaft and the gantry beam, and enables the head to perform Z-axis long-stroke overhang cutting, the cutting action is more stable and the cutting precision is Higher.

The reason is that in order to achieve the aforementioned purpose, this creation is to provide a Z-axis head linear rail counterweight mechanism, which includes a head seat, which is set above the workbench of the machine tool, and includes a saddle, a front cover, and multiple slides. Block, one side of the saddle is recessed with a rail groove extending along the Z-axis direction and has a first side and a corresponding second side and a third side, the front cover is a cover rail groove, each of the The slider is set relative to Placed on the second side and the third side; a head movably arranged in the rail groove, including a head body and four linear rails, the system of the head is provided with a main axis extending along the Z axis, And one side of the head body corresponding to the second side is connected to a screw of the machine tool, and each of the wire rails is arranged at the four corners of the head body and engages each of the sliders so that the head can be seated on the head seat. It moves along the Z-axis direction; a counterweight cylinder extends along the Z-axis direction and is interposed between the head body and the third side and connected to the head.

Preferably, the second side recess is provided with a first recess extending along the Z-axis direction, the screw system extends in the first recess, and one side of the head body is provided with a screw block extending into the first recess The groove is for the screw connection of the screw.

Preferably, the third side is recessed with a second groove extending along the Z-axis direction, and the counterweight cylinder extends in the second groove.

Preferably, a suspension seat is provided on the top side of the head body, and the top end of the counterweight cylinder is pivotally connected to the suspension seat.

Preferably, the main axis is set at the center of the head body, and the axis extends along the center of the head body and is parallel to the virtual line of the first side and the front cover.

This creation:

10: Z-axis head linear rail counterweight mechanism

12: Head seat

14: head

16: Counterweight cylinder

22: Saddle

24: front cover

26: Slider

28: Rail groove

30: first side

32: second side

34: third side

36: The first groove

38: second groove

40: Head body

42: Line rail

44: Screw block

46: suspension seat

Used:

1: Spindle

2: screw

3: motor

The first figure is a three-dimensional assembly diagram of a preferred embodiment of this creation.

The second figure is a partial top view of a preferred embodiment of this creation.

The third picture shows the screw, spindle and counterweight cylinder position in a preferred embodiment of this creation Schematic diagram on the same axis.

The fourth figure is a front view of a preferred embodiment of this creation (without front cover).

Hereinafter, a preferred embodiment of this creation will be cited, and further detailed description will be given in conjunction with the drawings as follows:

Please refer to the first to fourth figures, the Z-axis head linear rail counterweight mechanism 10 of a preferred embodiment of the present invention is applied to a machine tool (such as a gantry processing machine, etc.), and includes a head seat 12. A head 14 and a counterweight cylinder 16.

The head base 12 is arranged above the workbench of the machine tool (for example, the beam of the gantry, not shown in the figure). Slider 26. The saddle 22 has an ㄇ-shaped cross-section, and its front side is recessed with a rail groove 28 extending along the Z-axis direction (the direction perpendicular to the worktable) to form a first side 30 and an opposite second side 32, a The third side 34 is recessed with a first groove 36 extending in the Z-axis direction, and the third side 34 is recessed with a second groove 38 extending in the Z-axis direction. The front cover 24 is arranged on the front side of the saddle 22 to close the rail groove 28. Each of the sliding blocks 26 has a total of 12, which are generally U-shaped in cross-section, and are fixed on the second side 32 and the third side 34 in pairs opposite to each other.

The head 14 is movably arranged in the rail groove 28, and includes a head body 40 and four linear rails 42. The head body 40 is roughly square in section, and a main shaft of the machine tool is arranged in the center of the head body 40. 1 (Extend along the Z axis direction, the bottom end of which is for installing tools or additional heads, processing heads), and the head body 40 one A screw connection block 44 is arranged on the side to extend into the first groove 36 for a screw 2 of the screw connection machine tool (the top end is driven by a motor 3). Each of the linear rails 42 is arranged at the four corners of the head body 40 and engages with each of the sliders 26. When the screw 2 rotates, the head 14 can be moved along the Z-axis direction on the head base 12.

The counterweight cylinder 16 is pivotally connected to a suspension seat 46 provided on the top side of the head body 40, and extends in the second groove 38 between the head body 40 and the third side 34. The counterweight cylinder 16 is located on the two sides of the head body 40 relative to the screw 2 to balance the torque of the weight of the screw 2 to the head body 40 without affecting the accuracy of the operation of the main shaft 1. The screw 2, the main shaft 1 and the counterweight cylinder 16 are located on a virtual axis extending along the center of the head body 40 and parallel to one of the first side 32 and the front cover 24.

In this way, the features and functions of the Z-axis head linear rail counterweight mechanism 10 are as follows:

First, the saddle 22 and the front cover 24 have a closed structure, and the head body 40 is covered on four sides, so the structure is more rigid. Compared with the conventional machine tool, the head is set on the side of the saddle. When the head body 40 (spindle 1) performs Z-axis long-stroke overhang cutting, it can exhibit better processing capability and accuracy.

Secondly, the head body 40 uses the cooperation of four linear rails 42 and a plurality of sliders 26 to move inside the head base 12, which not only has a very good grasping force for the head body 40, improves rigidity and life, but also has frictional force. Very small, which allows the head 14 to move faster and more flexibly.

Furthermore, the screw 2 and the motor are arranged on the second side 32 of the saddle 22. The screw, which is different from the conventional machine tool, is arranged on the side of the saddle near the gantry beam (that is, the first side of the saddle 22 in the original creation). On one side 30, the screw system of the conventional machine tool is located between the main shaft and the gantry beam). This invention can shorten the distance between the main shaft 1 and the gantry beam, so that the cutting action is more stable and the cutting precision is higher.

In addition, the screw 2 and the counterweight cylinder 16 are located on the two sides of the main shaft 1, and each of the screw 2, the counterweight cylinder 16 and the main shaft 1 are located on the same virtual axis, the center of gravity is stable, and the linearity of the head body 40 can be achieved. Mobile optimization.

However, the above description is only one of the preferred embodiments of this creation, and should not be used to limit the scope of patent protection of this creation, for example, simple equivalent changes and substitutions made based on the scope of patent application of this creation and the contents of the description, All should still fall within the scope of protection covered by the scope of the patent application for this creation.

10: Z-axis head linear rail counterweight mechanism

12: Head seat

14: head

16: Counterweight cylinder

1: Spindle

2: screw

3: motor

Claims (5)

A Z-axis head linear rail counterweight mechanism, including: A head seat is set above the workbench of the machine tool and includes a saddle, a front cover and a plurality of sliding blocks. One side of the saddle is recessed with a rail groove extending along the Z axis and has a first side Corresponding to a second side and a third side, the front cover is a cover rail groove, and each of the sliders is oppositely arranged on the second side and the third side; A head is movably arranged in the rail groove and includes a head body and four linear rails. The system of the head is provided with a main axis extending along the Z-axis direction, and the head body corresponds to the second side One side is connected with a screw of the machine tool, and each of the linear rails is arranged at the four corners of the head body and engages with each of the sliders, so that the head can move along the Z-axis direction on the head seat; and A counterweight cylinder extending along the Z-axis direction and intervening between the head body and the third side and connecting the head; Thereby, the screw, the main shaft and the counterweight cylinder are located on the same axis. The Z-axis head linear rail counterweight mechanism according to claim 1, wherein the second side is recessed with a first groove extending along the Z-axis direction, the screw extends in the first groove, and One side of the head body is provided with a screw connection block extending into the first groove for screw connection of the screw rod. The Z-axis head linear rail counterweight mechanism according to claim 1, wherein the third side is recessed with a second groove extending along the Z-axis direction, and the counterweight cylinder extends in the second groove . The Z-axis head linear rail counterweight mechanism according to claim 1 or 3, wherein a suspension seat is provided on the top side of the head body, and the top end of the counterweight cylinder is pivotally connected to the suspension seat. The Z-axis head linear rail counterweight mechanism according to claim 1, wherein the main shaft is located at the center of the head body, and the axis extends along the center of the head body and is parallel to the first side and the front cover Virtual line.

Images