阅读说明：本技术 主轴箱重心平衡装置 (Spindle box gravity center balancing device ) 是由 谭勇 苏辉南 于 2021-07-22 设计创作，主要内容包括：本发明提供了一种主轴箱重心平衡装置,包括平衡气缸和储气装置,平衡气缸的缸体与机床滑鞍紧固连接,平衡气缸的活塞杆与主轴箱的外壁铰接连接,主轴箱在机床上做升降运动；平衡气缸在主轴箱的两侧分别安装有一个,两个平衡气缸以主轴箱的重心呈对称设置,且主轴箱的重心和两个平衡气缸的平衡点三者位于同一直线上；储气装置的出气口与两个平衡气缸分别连通。通过在主轴箱的两侧设置两个以主轴箱的重心为对称中心的两个平衡气缸,两个平衡气缸的平衡点与主轴箱的中心轴线位于同一直线上,使两个平衡气缸配合对主轴箱的自身重力进行平衡,符合重心平衡的设计理念,有助于增强平衡效率,从而有助于减小主轴箱自身重力对其动态响应性能的影响。(The invention provides a main shaft box gravity center balancing device which comprises a balancing cylinder and a gas storage device, wherein a cylinder body of the balancing cylinder is fixedly connected with a machine tool sliding saddle, a piston rod of the balancing cylinder is hinged with the outer wall of a main shaft box, and the main shaft box moves up and down on a machine tool; the two balancing cylinders are symmetrically arranged by the gravity center of the spindle box, and the gravity center of the spindle box and the balancing points of the two balancing cylinders are positioned on the same straight line; the air outlet of the air storage device is respectively communicated with the two balance cylinders. Two balancing cylinders which take the gravity center of the spindle box as a symmetric center are arranged on two sides of the spindle box, the balancing points of the two balancing cylinders and the central axis of the spindle box are located on the same straight line, the two balancing cylinders are matched to balance the self gravity of the spindle box, the design concept of gravity center balance is met, the balancing efficiency is enhanced, and the influence of the self gravity of the spindle box on the dynamic response performance is reduced.)

1. The gravity center balancing device of the spindle box is characterized by comprising a balancing cylinder (3) and a gas storage device (1), wherein a cylinder body of the balancing cylinder (3) is fixedly connected with a slide saddle of a machine tool, a piston rod of the balancing cylinder (3) is hinged with the outer wall of the spindle box (6), and the spindle box (6) moves up and down on the machine tool;

the balance cylinders (3) are respectively arranged on two sides of the spindle box (6), the two balance cylinders (3) are symmetrically arranged by using the gravity center (9) of the spindle box (6), and the gravity center (9) of the spindle box (6) and the balance points (10) of the two balance cylinders (3) are positioned on the same straight line;

the air outlet of the air storage device (1) is respectively communicated with the two balance cylinders (3).

2. A balance device of a center of gravity of a spindle head according to claim 1, wherein balance points (10) of the two balance cylinders (3) are symmetrically arranged with a center of gravity (9) of a spindle head (6) as a symmetric point.

3. The spindle box center of gravity balancing device according to claim 1, characterized in that a balancing stand (7) is fixedly mounted on the upper side of the spindle box (6), one end of the balancing stand (7) extends horizontally to the side far away from the spindle box (6), and the piston rod of the balancing cylinder (3) is connected to the side of the balancing stand (7) extending out of the spindle box (6).

4. The spindle box center of gravity balancing device according to claim 3, characterized in that the end of the piston rod of the balancing cylinder (3) is hingedly connected to the balancing stand (7) by a universal joint.

5. The spindle box center of gravity balancing device according to claim 3, wherein the machine tool saddle comprises a horizontally disposed mounting portion (4), the mounting portion (4) is located at a lower side of the balance frame (7), the cylinder body of the balance cylinder (3) is vertically mounted on the mounting portion (4), and the piston rod of the balance cylinder (3) penetrates through the mounting portion (4) from bottom to top and is in sliding fit with the mounting portion.

6. The headstock center of gravity balancing apparatus of claim 1, wherein the gas storage device (1) comprises a pressure cylinder, and the gas storage device (1) provides stable gas pressure to the two balancing cylinders (3).

7. The spindle box center of gravity balancing device according to claim 1, wherein the gas outlet of the gas storage device (1) is respectively communicated with the two balancing cylinders (3) through a high pressure pipe (2), and the pressure value output by the gas storage device (1) is proportional to the overall gravity of the spindle box (6).

8. The headstock center of gravity balancing apparatus of claim 7, wherein the connection of the high pressure pipe (2) and the balancing cylinder (3) is located at the lower portion of the balancing cylinder (3).

9. The headstock center of gravity balancing apparatus of claim 1, wherein the balancing point (10) of the balancing cylinder (3) is located on the vertical axis of the connecting point of the balancing cylinder (3) and the saddle.

10. The spindle box center of gravity balancing device according to claim 1, characterized in that a guide rail (8) is vertically provided on the machine tool, the spindle box (6) is mounted on the guide rail (8) and slidably engaged therewith, and the moving direction of the spindle box (6) is the same direction as the length direction of the guide rail (8).

Technical Field

The invention relates to the field of machining equipment, in particular to a spindle box gravity center balancing device.

Background

The main spindle box is one of the most important parts in the whole machine tool, plays the responsibility of Z-axis movement, is connected with the main spindle in series for processing, and directly influences the integral operation precision of the machine tool by the dynamic and static performance of the main spindle box. However, the dynamic response performance of the headstock in the Z axis is often weakened due to the gravity of the headstock itself, so it is necessary to balance and offset the gravity of the headstock itself.

The prior Chinese patent with publication number CN209124913U discloses a built-in spindle box balancing device, which comprises a sliding seat, a spindle box and a balancing device, wherein the sliding seat is arranged on a machine tool, and the spindle box is movably connected in the sliding seat; the spindle box comprises a square shaft frame and a motion guide device which is arranged on the square shaft frame and is used for being connected with the sliding seat, the square shaft frame can do vertical lifting motion under the action of the motion guide device, and the interior of the square shaft frame is of a hollow structure; the balancing device is arranged above the spindle box and the sliding seat and extends into the spindle box, and the balancing device can perform balance adjustment on the action of gravity borne by the spindle box.

The inventor believes that the balancing efficiency of the balancing device in the prior art is poor, and there is a need for improvement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a balancing device for the center of gravity of a main spindle box.

The gravity center balancing device of the spindle box comprises a balancing cylinder and a gas storage device, wherein a cylinder body of the balancing cylinder is fixedly connected with a machine tool sliding saddle, a piston rod of the balancing cylinder is hinged with the outer wall of the spindle box, and the spindle box performs lifting motion on a machine tool; the balance cylinders are respectively arranged on two sides of the spindle box, the two balance cylinders are symmetrically arranged by using the gravity center of the spindle box, and the gravity center of the spindle box and the balance points of the two balance cylinders are positioned on the same straight line; and the gas outlet of the gas storage device is respectively communicated with the two balance cylinders.

Preferably, the balance points of the two balance cylinders are symmetrically arranged by taking the gravity center of the main spindle box as a symmetrical point.

Preferably, a balance frame is fixedly mounted on the upper side of the spindle box, one end of the balance frame horizontally extends towards one side far away from the spindle box, and a piston rod of the balance cylinder is connected to one side, extending out of the spindle box, of the balance frame.

Preferably, the end part of the piston rod of the balance cylinder is hinged with the balance frame through a universal movable joint.

Preferably, the lathe saddle is including the installation department that is the level setting, the installation department is located the downside of balancing stand, the cylinder body of equalizing cylinder is vertical to be installed on the installation department, just the piston rod of equalizing cylinder is worn to establish the installation department and is slided the cooperation rather than from upwards.

Preferably, the gas storage device comprises a pressure bottle, and the gas storage device provides stable gas pressure for the two balance cylinders.

Preferably, an air outlet of the air storage device is respectively communicated with the two balance cylinders through a high-pressure pipe, and the pressure value output by the air storage device is in direct proportion to the overall gravity of the spindle box.

Preferably, the connection position of the high-pressure pipe and the balance cylinder is positioned at the lower part of the balance cylinder.

Preferably, the balancing point of the balancing cylinder is located on the vertical axis of the connection point of the balancing cylinder and the saddle.

Preferably, a guide slide rail is vertically arranged on the machine tool, the spindle box is mounted on the guide slide rail and is in sliding fit with the guide slide rail, and the moving direction of the spindle box is in the same direction as the length direction of the guide slide rail.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the two balancing cylinders which take the gravity center of the spindle box as a symmetric center are arranged on the two sides of the spindle box, and the balancing points of the two balancing cylinders and the central axis of the spindle box are positioned on the same straight line, so that the two balancing cylinders are matched to balance the self gravity of the spindle box, the design concept of gravity center balance is met, the balancing efficiency is enhanced, the influence of the self gravity of the spindle box on the dynamic response performance of the spindle box is reduced, and the overall precision, the static and dynamic performance and the service life of the machine tool are improved;

2. according to the invention, the balance cylinder is arranged on the machine tool saddle through the matching of the balance frame and the mounting part, the balance cylinder supports the spindle box and does not move along with the spindle box in the vertical direction, so that the stability of the balance cylinder in balancing the gravity of the spindle box is improved;

3. according to the invention, the piston rod of the balance cylinder is movably connected with the balance frame through the universal movable joint, so that the balance cylinder is protected, and the service life of the balance cylinder is prolonged.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the overall structure of a balancing apparatus according to the present invention;

fig. 2 is a schematic view of the bottom structure of the balancing apparatus according to the present invention.

Shown in the figure:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1, the spindle box gravity center balancing device provided by the invention comprises a balancing cylinder 3 and a gas storage device 1, wherein a cylinder body of the balancing cylinder 3 is fixedly connected with a saddle of a machine tool, a piston rod of the balancing cylinder 3 is hinged with an outer wall of a spindle box 6, and the spindle box 6 performs lifting motion on the machine tool. The two balancing cylinders 3 are respectively arranged on two sides of the spindle box 6, the two balancing cylinders 3 are symmetrically arranged by using the gravity center 9 of the spindle box 6, and the gas storage device 1 is respectively communicated with the two balancing cylinders 3.

The two balancing cylinders 3 symmetrically arranged by the gravity center 9 of the spindle box 6 act on the spindle box 6 at the same time, and play a role in supporting the spindle box 6 and balancing the gravity of the spindle box 6 so as to achieve the purpose of optimizing the dynamic performance of the machine tool.

As shown in fig. 1, the machine tool saddle includes two horizontal mounting portions 4 extending outwards, the two mounting portions 4 are respectively located at two sides of the spindle box 6, the two mounting portions 4 are both spaced from the spindle box 6, and the two mounting portions 4 are respectively the mounting bases of the two balance cylinders 3, and the two balance cylinders 3 are not involved in the movement of the spindle box 6 in the vertical direction. The cylinder bodies of the two balance cylinders 3 are vertically fastened and installed on the lower sides of the corresponding installation parts 4, and piston rods of the two balance cylinders 3 vertically penetrate through the installation parts 4 from bottom to top and are in sliding fit with the installation parts.

The upside fastening of headstock 6 is installed balancing stand 7, and the upper end level of balancing stand 7 extends to the one side of keeping away from headstock 6, and balancing stand 7 is the one-to-one setting with installation department 4, and balancing stand 7 is located the upside of installation department 4. The end parts of the piston rods of the two balance cylinders 3 vertically penetrating through the mounting part 4 are hinged to the corresponding balance frames 7 through universal movable joints. The piston rod of the balance cylinder 3 is arranged on the balance frame 7 through the movable joint, so that the movable connection between the piston rod of the balance cylinder 3 and the balance frame 7 is realized, and the service life of the balance cylinder 3 is prolonged.

The balance point 10 of the balance cylinder 3 is located on the vertical axis of the connection point of the balance cylinder 3 and the saddle, preferably, the balance point 10 is located at the connection position of the balance cylinder 3 and the mounting part 4, and the balance points 10 of the two balance cylinders 3 are symmetrically arranged by taking the gravity center 9 of the spindle box 6 as a symmetrical point. During the installation, install the focus 9 of headstock 6 and the balance point 10 three of two balance cylinder 3 on same straight line, this design can strengthen this balancing unit's balanced efficiency, and then improves the dynamic response performance of headstock 6 motion, accords with the design theory that focus 9 is balanced.

The gas storage device 1 is a pressure bottle, high-pressure gas is stored in the gas storage device 1, and the gas storage device 1 is fixedly installed on the machine tool through a hoop. The gas outlet of the gas storage device 1 is respectively communicated with the two balance cylinders 3 through the high-pressure pipes 2, so that stable pressure is provided for the two balance cylinders 3. The junction of high-pressure pipe 2 and balance cylinder 3 all is located balance cylinder 3's lower part to the realization is to the drive of two balance cylinder 3 piston rods, and the pressure value of gas storage device 1 output is directly proportional with 6 whole gravity sizes of headstock, in order to reach the effect that two balance cylinder 3 can balance 6 self gravities just.

As shown in fig. 1 and 2, a guide slide rail 8 is vertically arranged on the machine tool, the spindle head 6 is mounted on the guide slide rail 8 and is in sliding fit with the guide slide rail 8, and the moving direction of the spindle head 6 is the same as the length direction of the guide slide rail 8. When the main shaft box 6 moves, the gravity of the main shaft box 6 is balanced by means of the two balance cylinders 3, the balance device utilizes the gravity center 9 balance design concept, balance efficiency can be enhanced, the gravity of the main shaft box 6 is directly balanced, and therefore the influence of the gravity of the main shaft box 6 on the dynamic response performance of the main shaft box is reduced, the overall precision of a machine tool is improved, the static dynamic performance of the machine tool is improved, and the service life of the machine tool is prolonged.

Principle of operation

During installation, the two balance cylinders 3 are respectively installed on the installation part 4 and the balance frame 7 at two sides of the spindle box 6, so that the balance points 10 of the two balance cylinders 3 are symmetrically arranged by taking the gravity center 9 of the spindle box 6 as a symmetric center, and the gravity center 9 of the spindle box 6 and the balance points 10 of the two balance cylinders 3 are positioned on the same straight line; the gas storage device 1 is respectively communicated with the two balance cylinders 3 through the high-pressure pipe 2, stable air pressure is provided for the two driving cylinders, the piston rods of the two balance cylinders 3 are driven, the pressure value output by the gas storage device 1 is in direct proportion to the overall gravity of the spindle box 6, and the effect that the two balance cylinders 3 can just balance the self gravity of the spindle box 6 is achieved.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.