Suspended spindle box and machine tool

Abstract

The present invention provides a suspended spindle box and machine tool, comprising a front wall, a rear wall, a first side wall, a second side wall, a top wall and a bottom plate; one end of the first side wall is arranged on the rear wall, and the end of the first side wall away from the rear wall is arranged on the front wall; one end of the bottom plate is arranged on the rear wall, and the end of the bottom plate away from the rear wall is arranged on the front wall; one end of the second side wall is arranged on the rear wall, and the end of the second side wall away from the rear wall is arranged on the front wall; one end of the top wall is arranged on the rear wall, and the end of the top wall away from the rear wall is arranged on the front wall; the first side wall, the bottom plate, the second side wall and the top wall are sequentially connected and arranged along the circumferential direction. The present invention has the characteristics of long overhang, and has high-quality rigidity, strength and stability.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, and in particular to a suspended spindle box and a machine tool. Background Art

[0002] The spindle box is a component in the machine tool that holds and installs the machine tool spindle. It plays a pivotal role in the machine tool. The performance of the spindle box directly affects the machining accuracy of the machine tool. In today's market, the functional requirements for machine tools are becoming more and more extensive, and a horizontal machining equipment with a long Z axis is urgently needed.

[0003] Since the stainless steel box processing machine is a horizontal machine tool structure and the batch of parts to be processed has large dimensions, the size of the worktable increases, so a spindle box with long overhang, good rigidity and strength is required.

[0004] The patent document with publication number CN210208680U discloses an integrated spindle box, which includes a spindle box body, a transmission component mounting seat and a spindle box base, wherein the spindle box base is fixedly connected to the bed of the machine tool, a motor mounting cavity is arranged on the spindle box base, the contact surface between the spindle box base and the bed is a base mounting surface, the base mounting surface extends in a vertical direction, a transmission component mounting seat is arranged at one end of the spindle box base away from the base mounting surface, a spindle box body is arranged at the lower end of the transmission component mounting seat, and the spindle box body, the transmission component mounting seat and the spindle box base are integrally formed by lost foam casting. However, this patent still has the defect of short overhang distance. Summary of the invention

[0005] In view of the defects in the prior art, an object of the present invention is to provide a suspended spindle box and a machine tool.

[0006] A suspended spindle box according to the present invention comprises a front wall, a rear wall, a first side wall, a second side wall, a top wall and a bottom plate;

[0007] One end of the first side wall is arranged on the rear wall, and one end of the first side wall away from the rear wall is arranged on the front wall;

[0008] One end of the bottom plate is arranged on the rear wall, and one end of the bottom plate away from the rear wall is arranged on the front wall;

[0009] One end of the second side wall is arranged on the rear wall, and one end of the second side wall away from the rear wall is arranged on the front wall;

[0010] One end of the top wall is arranged on the rear wall, and one end of the top wall away from the rear wall is arranged on the front wall;

[0011] The first side wall, the bottom plate, the second side wall and the top wall are sequentially connected and arranged along the circumferential direction.

[0012] Preferably, a viewing window is provided on the first side wall.

[0013] Preferably, a first connecting leg is provided on the rear wall, and the first side wall is connected to the rear wall via the first connecting leg.

[0014] Preferably, a second connecting leg is provided on the rear wall, and the second side wall is connected to the rear wall via the second connecting leg.

[0015] Preferably, a nut seat is provided on the rear wall.

[0016] Preferably, a balancing seat is provided on the rear wall.

[0017] Preferably, a cooling water jacket is provided on the front wall.

[0018] Preferably, the first side wall, the second side wall, the top wall and the bottom plate are all provided with tapered ribs.

[0019] Preferably, the first side wall, the second side wall, the top wall and the bottom plate are all provided with transverse ribs.

[0020] The present invention also provides a machine tool, comprising the above-mentioned suspended spindle box.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention has the structural characteristics of a closed shell and a large overhang distance, and is cast;

[0023] 2. The present invention is equipped with a reasonable reinforcing rib wall, so that the spindle box is fully adapted to the long-stroke shaft extension working condition and has high-quality rigidity, strength and stability;

[0024] 3. The present invention is equipped with a gravity balance device with excellent dynamic performance;

[0025] 4. The present invention is equipped with a cooling water jacket, which has a good cooling effect on the machine tool spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of the suspended spindle box of the present invention;

[0028] Figure 2 It is a cross-sectional view of the suspended spindle box of the present invention.

[0029] The figure shows:

[0030] Front wall 201 First connecting leg 208

[0031] Rear wall 202 Second connecting leg 209

[0032] First side wall 203 Nut seat 2010

[0033] Second side wall 204 Balance seat 2011

[0034] Top wall 205 Cooling water jacket 2012

[0035] Bottom plate 206 Conical rib plate 2013

[0036] Window 207 Hengjin 2014 DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0038] like Figure 1 and Figure 2 As shown, the present invention provides a suspended spindle box, comprising a front wall 201, a rear wall 202, a first side wall 203, a second side wall 204, a top wall 205 and a bottom plate 206, wherein one end of the first side wall 203 is arranged on the rear wall 202, and one end of the first side wall 203 away from the rear wall 202 is arranged on the front wall 201, one end of the bottom plate 206 is arranged on the rear wall 202, and one end of the bottom plate 206 away from the rear wall 202 is arranged on the front wall 201, one end of the second side wall 204 is arranged on the rear wall 202, and one end of the second side wall 204 away from the rear wall 202 is arranged on the front wall 201, one end of the top wall 205 is arranged on the rear wall 202, and one end of the top wall 205 away from the rear wall 202 is arranged on the front wall 201, and the first side wall 203, the bottom plate 206, the second side wall 204 and the top wall 205 are sequentially connected and arranged along the circumferential direction.

[0039] A first connecting leg 208 is provided on the rear wall 202 , and the first side wall 203 is connected to the rear wall 202 via the first connecting leg 208 . A second connecting leg 209 is provided on the rear wall 202 , and the second side wall 204 is connected to the rear wall 202 via the second connecting leg 209 .

[0040] A viewing window 207 is provided on the first side wall 203, a nut seat 2010 is provided on the rear wall 202, a balancing seat 2011 is provided on the rear wall 202, a cooling water jacket 2012 is provided on the front wall 201, the first side wall 203, the second side wall 204, the top wall 205 and the bottom plate 206 are all provided with conical ribs 2013, and the first side wall 203, the second side wall 204, the top wall 205 and the bottom plate 206 are all provided with transverse ribs 2014.

[0041] The present invention also provides a machine tool, comprising the above-mentioned suspended spindle box.

[0042] In the preferred example, the main body of the spindle box is similar to a regular tetrahedron cone structure, and the outer wall surface is mainly composed of the rear wall, the conical side wall, the conical top wall and the bottom plate, forming a nearly closed regular tetrahedron. There are four connecting legs symmetrically designed on both sides of the rear wall, forming a central symmetrical structure about the back, and observation windows are designed on the conical side wall and the conical top wall. The through-hole structure is of appropriate size. A nut seat and a balance seat are designed on the rear side of the conical top wall. The nut seat is cast and then precisely machined by a machine tool, with good surface roughness and dimensional accuracy. The nut seat and the balance seat are symmetrical about the center line of the spindle box and are close to the gravity point of the spindle box.

[0043] The inner cavity of the suspended spindle box is a hollow structure with reasonable reinforcement rib arrangement. In the inner cavity of the spindle box, a cooling water jacket is designed at the front end for installing the machine tool spindle. After casting, it is finely processed by machine tools, with good surface roughness, dimensional tolerance, and shape and position tolerance. At the middle and rear end of the inner cavity of the spindle box, several tapered ribs and transverse ribs are designed, and each reinforcement rib is of appropriate size and reasonably positioned.

[0044] How it works :

[0045] The slider guide rail is installed through the four connecting legs designed on the rear wall, which is rigidly connected to the column to provide support for the entire spindle box. A nut screw is installed on the nut seat on the rear side of the conical top wall to provide drive for the entire spindle box and produce up and down linear motion. A balancing hydraulic cylinder is installed on the balance seat next to the nut seat to balance the gravity of the spindle box itself, so as to enhance the dynamic response performance of the spindle box and increase the service life of the nut screw. The machine tool spindle is installed in the cooling water jacket at the front end of the spindle box. The cooling water jacket is circulated with cooling oil. The purpose of the cooling water jacket is to cool the machine tool spindle to ensure that the high-speed rotating bearings and other components in the machine tool spindle reach the optimal working environment and maintain the high precision and long life of the spindle. Because the spindle box has a large overhang distance, a number of tapered ribs and transverse ribs optimized by FEA are designed in the middle and rear section of the spindle box cavity, so that the spindle box has excellent strength, rigidity and stability. The outer wall of the spindle box is designed with an observation window at a suitable position, which can observe the internal state of the spindle box at any time, and also plays a role in heat dissipation, and is convenient for early installation and later maintenance. As a whole, the spindle box has the characteristics of long overhang, and the shape of the spindle box is close to a closed regular tetrahedron structure, with a hollow inner cavity and a reasonable reinforcement wall, so that the spindle box is fully adapted to the long-stroke shaft extension working condition, and has high-quality rigidity, strength and stability.

[0046] In terms of performance, the spindle box is equipped with a cooling water jacket, which has a good cooling effect on the machine tool spindle; the spindle box is equipped with a gravity balance device, and has excellent dynamic performance; the spindle box shape is close to a closed regular tetrahedron structure, the inner cavity is hollow, and it is equipped with reasonable reinforcing rib walls, so that the spindle box is fully adapted to the long-stroke shaft extension working conditions and has high-quality rigidity, strength and stability.

[0047] The present invention has the characteristics of long overhang, the main spindle box has an appearance close to a closed regular tetrahedron structure, the inner cavity is hollow, and a reasonable reinforcing rib wall is configured, so that the main spindle box is fully adapted to the long-stroke shaft extension working condition and has high-quality rigidity, strength and stability.

[0048] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A suspended spindle box, characterized in that: It comprises a front wall (201), a rear wall (202), a first side wall (203), a second side wall (204), a top wall (205) and a bottom plate (206); One end of the first side wall (203) is arranged on the rear wall (202), and one end of the first side wall (203) away from the rear wall (202) is arranged on the front wall (201); One end of the bottom plate (206) is arranged on the rear wall (202), and one end of the bottom plate (206) away from the rear wall (202) is arranged on the front wall (201); One end of the second side wall (204) is arranged on the rear wall (202), and one end of the second side wall (204) away from the rear wall (202) is arranged on the front wall (201); One end of the top wall (205) is arranged on the rear wall (202), and one end of the top wall (205) away from the rear wall (202) is arranged on the front wall (201); The first side wall (203), the bottom plate (206), the second side wall (204) and the top wall (205) are sequentially connected and arranged along the circumferential direction; The first side wall (203) is provided with a viewing window (207); The rear wall (202) is provided with a first connecting leg (208), and the first side wall (203) is connected to the rear wall (202) via the first connecting leg (208); The rear wall (202) is provided with a second connecting leg (209), and the second side wall (204) is connected to the rear wall (202) via the second connecting leg (209); A nut seat (2010) is provided on the rear wall (202); A balancing seat (2011) is provided on the rear wall (202); A cooling water jacket (2012) is provided on the front wall (201); Four connecting legs are symmetrically arranged on both sides of the rear wall, forming a centrally symmetrical structure with respect to the rear wall; The nut seat and the balance seat are symmetrical about the center line of the spindle box; The inner cavity of the spindle box is a hollow structure.

2. The suspended spindle box according to claim 1, characterized in that: The first side wall (203), the second side wall (204), the top wall (205) and the bottom plate (206) are all provided with conical rib plates (2013).

3. The suspended spindle box according to claim 1, characterized in that: The first side wall (203), the second side wall (204), the top wall (205) and the bottom plate (206) are all provided with transverse ribs (2014).

4. A machine tool, characterized in that: A suspended spindle box comprising any one of claims 1 to 3.

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