阅读说明：本技术 一种具有多自由度的数控机床 (Numerical control machine tool with multiple degrees of freedom ) 是由 俞曙光 于 2021-07-13 设计创作，主要内容包括：本发明涉及一种具有多自由度的数控机床,包括：机床外壳及机床床身,所述机床床身收容在所述机床外壳内；所述机床外壳上设置有触摸显示屏；所述机床床身包括：底座、加工平台、水平横移驱动器、支撑架、纵向竖移驱动机构、水平纵移驱动机构及加工刀头机构；所述水平横移驱动器与所述加工平台驱动连接,所述加工平台滑动设置在所述底座上；所述纵向竖移驱动机构设置在所述支撑架上,所述水平纵移驱动机构与所述纵向竖移驱动机构驱动连接,所述加工刀头机构与所述水平纵移驱动机构驱动连接；所述加工刀头机构设置在所述底座的上方。本发明公开的具有多自由度的数控机床,数控机床可以从多个方向对零件进行多维度的加工,加工效果好,且加工效率高。(The invention relates to a numerical control machine tool with multiple degrees of freedom, comprising: the machine tool comprises a machine tool shell and a machine tool body, wherein the machine tool body is accommodated in the machine tool shell; a touch display screen is arranged on the machine tool shell; the machine tool body comprises: the device comprises a base, a processing platform, a horizontal transverse moving driver, a support frame, a longitudinal vertical moving driving mechanism, a horizontal longitudinal moving driving mechanism and a processing tool bit mechanism; the horizontal traversing driver is in driving connection with the processing platform, and the processing platform is arranged on the base in a sliding manner; the longitudinal vertical movement driving mechanism is arranged on the support frame, the horizontal vertical movement driving mechanism is in driving connection with the longitudinal vertical movement driving mechanism, and the machining tool bit mechanism is in driving connection with the horizontal vertical movement driving mechanism; the processing tool bit mechanism is arranged above the base. The numerical control machine tool with multiple degrees of freedom disclosed by the invention can carry out multi-dimensional processing on parts from multiple directions, and has good processing effect and high processing efficiency.)

1. A numerically controlled machine tool having multiple degrees of freedom, comprising: the machine tool comprises a machine tool shell and a machine tool body, wherein the machine tool body is accommodated in the machine tool shell; a touch display screen is arranged on the machine tool shell;

the machine tool body comprises: the device comprises a base, a processing platform, a horizontal transverse moving driver, a support frame, a longitudinal vertical moving driving mechanism, a horizontal longitudinal moving driving mechanism and a processing tool bit mechanism;

the horizontal traversing driver is in driving connection with the processing platform, and the processing platform is arranged on the base in a sliding manner; the longitudinal vertical movement driving mechanism is arranged on the support frame, the horizontal vertical movement driving mechanism is in driving connection with the longitudinal vertical movement driving mechanism, and the machining tool bit mechanism is in driving connection with the horizontal vertical movement driving mechanism; the processing tool bit mechanism is arranged above the base.

2. The numerically controlled machine tool with multiple degrees of freedom according to claim 1, wherein the base comprises a seat body and a guide rod, the guide rod being disposed on the base; the machining platform comprises a platform connecting plate and a platform bearing plate, the platform connecting plate is provided with a plurality of guide blocks, the guide blocks are provided with through holes, and the through holes are matched with the guide rods so that the platform connecting plate can be arranged along the guide rods in a sliding mode;

the platform bearing plate is connected with the platform connecting plate through a bolt.

3. The numerically controlled machine tool with multiple degrees of freedom according to claim 2, wherein the platform connecting plate and the platform bearing plate are both quadrilateral in structure, and through holes are formed at four corners of the platform connecting plate and the platform bearing plate, and the bolts sequentially pass through the through holes of the platform connecting plate and the through holes of the platform bearing plate.

4. The numerically controlled machine tool with multiple degrees of freedom according to claim 1, wherein said machining head means comprises: the connecting body, the tool bit driver, the driving gear, the driven gear and the tool bit are connected; the connecting body is in driving connection with the horizontal longitudinal movement driving mechanism, the driving gear is arranged on the connecting body, the driving gear is in driving connection with the tool bit driver, the driven gear is meshed with the driving gear, and the tool bit is in driving connection with the driven gear.

5. The numerically controlled machine tool with multiple degrees of freedom according to claim 1, wherein the longitudinal vertical movement driving mechanism comprises a longitudinal vertical movement driving motor and a longitudinal vertical movement driving lead screw in driving connection with the longitudinal vertical movement driving motor.

6. The numerically controlled machine tool with multiple degrees of freedom according to claim 1, wherein the horizontal translation driving mechanism comprises a horizontal translation driving motor and a horizontal translation driving lead screw in driving connection with the horizontal translation driving motor.

7. The numerical control machine tool with multiple degrees of freedom according to claim 1, wherein a protective outer frame and a protective panel are further arranged on the machine tool housing, and the touch display screen is nested and mounted on the upper part of the protective outer frame;

the lower part of the protective outer frame is provided with a seesaw type guide groove, and the back of the protective panel is provided with a seesaw type rotating column; the rocker type rotating column is rotatably arranged in the rocker type guide groove in a penetrating way and is arranged along the rocker type guide groove in a sliding way;

a first guide groove is formed in one side of the protective outer frame, a matching convex strip is arranged on one side of the back surface of the protective panel, and the matching convex strip is arranged along the first guide groove in a sliding mode; the matching convex strip is connected with the first guide groove through a covering reset spring, and the covering reset spring provides elastic restoring force for the matching convex strip so that the protection panel has the tendency of covering the touch display screen;

a second guide groove is formed in the other side of the protection outer frame, a sliding connecting block is arranged in the second guide groove in a sliding mode, and the sliding connecting block is connected with the back face of the protection panel through a wane reset spring;

the protection panel is provided with a matching fixture block, the lower part of the protection outer frame is provided with a covering and maintaining lug and an anti-reset blocking block, and the covering and maintaining lug and the anti-reset blocking block are arranged at intervals; the matching clamping block is clamped or separated with the covering and keeping lug, and the matching clamping block is clamped or separated with the anti-resetting blocking block;

the rocker return spring and the cover keeping lug are respectively arranged at two sides of the rocker guide groove; the cover keeps the lug and prevent that the barrier block that resets sets up in the same one side of wane formula guiding groove.

8. The numerically-controlled machine tool with multiple degrees of freedom according to claim 7, wherein the number of the anti-reset blocking blocks is multiple, and the multiple anti-reset blocking blocks are arranged at intervals to form multiple stages of anti-reset blocking for the matched clamping blocks.

9. The numerically-controlled machine tool with multiple degrees of freedom according to claim 7, wherein an in-place reminding block is further provided on the back surface of the protective panel, and the in-place reminding block is in contact with or separated from the bottom edge of the protective outer frame.

Technical Field

The invention relates to the technical field of numerical control machine tools, in particular to a numerical control machine tool with multiple degrees of freedom.

Background

The numerical control machine tool is a short name of a digital control machine tool (Computer numerical control machine tools), and is an automatic machine tool provided with a program control system. The command input into the control system is processed by operation to send out various control signals to control the action of the machine tool, and the parts are automatically machined according to the shape and size required by the drawing.

However, the existing numerical control machine tool can only process the part at a single angle, so the processing of the part is very limited, and the processing efficiency is low. At present, a part needing multi-dimensional machining needs a plurality of numerical control machines to be matched with machining to be finally finished, or the direction of the part needs to be adjusted for multiple times to change the machining angle. Therefore, the existing numerical control machine tool has low efficiency in processing parts requiring multi-dimensional processing.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the numerical control machine tool with multiple degrees of freedom, the numerical control machine tool can carry out multi-dimensional processing on parts from multiple directions, the processing effect is good, and the processing efficiency is high.

The purpose of the invention is realized by the following technical scheme:

a numerically controlled machine tool having multiple degrees of freedom, comprising: the machine tool comprises a machine tool shell and a machine tool body, wherein the machine tool body is accommodated in the machine tool shell; a touch display screen is arranged on the machine tool shell;

the machine tool body comprises: the device comprises a base, a processing platform, a horizontal transverse moving driver, a support frame, a longitudinal vertical moving driving mechanism, a horizontal longitudinal moving driving mechanism and a processing tool bit mechanism;

the horizontal traversing driver is in driving connection with the processing platform, and the processing platform is arranged on the base in a sliding manner; the longitudinal vertical movement driving mechanism is arranged on the support frame, the horizontal vertical movement driving mechanism is in driving connection with the longitudinal vertical movement driving mechanism, and the machining tool bit mechanism is in driving connection with the horizontal vertical movement driving mechanism; the processing tool bit mechanism is arranged above the base.

In one embodiment, the base comprises a base body and a guide rod, and the guide rod is arranged on the base; the machining platform comprises a platform connecting plate and a platform bearing plate, the platform connecting plate is provided with a plurality of guide blocks, the guide blocks are provided with through holes, and the through holes are matched with the guide rods so that the platform connecting plate can be arranged along the guide rods in a sliding mode;

the platform bearing plate is connected with the platform connecting plate through a bolt.

In one embodiment, the platform connecting plate and the platform bearing plate are both of a quadrilateral structure, through holes are formed in four corners of the platform connecting plate and four corners of the platform bearing plate, and the bolts sequentially penetrate through the through holes of the platform connecting plate and the through holes of the platform bearing plate.

In one embodiment, the tool tip machining mechanism comprises: the connecting body, the tool bit driver, the driving gear, the driven gear and the tool bit are connected; the connecting body is in driving connection with the horizontal longitudinal movement driving mechanism, the driving gear is arranged on the connecting body, the driving gear is in driving connection with the tool bit driver, the driven gear is meshed with the driving gear, and the tool bit is in driving connection with the driven gear.

In one embodiment, the longitudinal vertical movement driving mechanism comprises a longitudinal vertical movement driving motor and a longitudinal vertical movement driving lead screw in driving connection with the longitudinal vertical movement driving motor.

In one embodiment, the horizontal longitudinal movement driving mechanism comprises a horizontal longitudinal movement driving motor and a horizontal longitudinal movement driving lead screw in driving connection with the horizontal longitudinal movement driving motor.

In one embodiment, a protective outer frame and a protective panel are further arranged on the machine tool shell, and the touch display screen is nested and arranged on the upper part of the protective outer frame;

the lower part of the protective outer frame is provided with a seesaw type guide groove, and the back of the protective panel is provided with a seesaw type rotating column; the rocker type rotating column is rotatably arranged in the rocker type guide groove in a penetrating way and is arranged along the rocker type guide groove in a sliding way;

a first guide groove is formed in one side of the protective outer frame, a matching convex strip is arranged on one side of the back surface of the protective panel, and the matching convex strip is arranged along the first guide groove in a sliding mode; the matching convex strip is connected with the first guide groove through a covering reset spring, and the covering reset spring provides elastic restoring force for the matching convex strip so that the protection panel has the tendency of covering the touch display screen;

a second guide groove is formed in the other side of the protection outer frame, a sliding connecting block is arranged in the second guide groove in a sliding mode, and the sliding connecting block is connected with the back face of the protection panel through a wane reset spring;

the protection panel is provided with a matching fixture block, the lower part of the protection outer frame is provided with a covering and maintaining lug and an anti-reset blocking block, and the covering and maintaining lug and the anti-reset blocking block are arranged at intervals; the matching clamping block is clamped or separated with the covering and keeping lug, and the matching clamping block is clamped or separated with the anti-resetting blocking block;

the rocker return spring and the cover keeping lug are respectively arranged at two sides of the rocker guide groove; the cover keeps the lug and prevent that the barrier block that resets sets up in the same one side of wane formula guiding groove.

In one embodiment, the number of the anti-reset blocking blocks is multiple, and the multiple anti-reset blocking blocks are arranged at intervals to form multi-stage anti-reset blocking for the matched clamping blocks.

In one embodiment, the back surface of the protection panel is further provided with an in-place reminding block, and the in-place reminding block is in contact with or separated from the bottom edge of the protection outer frame.

The numerical control machine tool with multiple degrees of freedom disclosed by the invention can carry out multi-dimensional processing on parts from multiple directions, and has good processing effect and high processing efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a general schematic view of a numerically controlled machine tool having multiple degrees of freedom according to the present invention;

fig. 2 is a schematic structural view of the machine bed shown in fig. 1;

FIG. 3 is a schematic view of the machining platform of FIG. 2 engaged with a guide bar;

FIG. 4 is a schematic diagram of the machined tool tip mechanism shown in FIG. 2;

FIG. 5 is a schematic view showing a state where the touch screen, the protective outer frame and the protective panel are engaged with each other when the touch screen, the protective outer frame and the protective panel are closed;

FIG. 6 is a schematic diagram illustrating a state where the touch screen, the protective outer frame and the protective panel are engaged with each other in an exposed state;

FIG. 7 is an exploded view of FIG. 6;

FIG. 8 is an enlarged view of a portion of FIG. 7;

fig. 9 is a schematic view showing a state change of the protection panel from the inclined state to the horizontal state.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the present invention discloses a numerical control machine tool 10 having multiple degrees of freedom, including: machine tool housing 20 and machine tool bed 30, machine tool bed 30 is accommodated in machine tool housing 20, and machine tool housing 20 is provided with touch display screen 40.

As shown in fig. 2, the machine bed 30 includes: the machine tool comprises a base 310, a processing platform 320, a horizontal traversing driver (not shown), a support frame 340, a longitudinal and vertical movement driving mechanism 350, a horizontal longitudinal movement driving mechanism 360 and a processing tool head mechanism 370.

The horizontal traversing driver is in driving connection with the processing platform 320, and the processing platform 320 is arranged on the base 310 in a sliding manner. The longitudinal vertical movement driving mechanism 350 is arranged on the supporting frame 340, the horizontal vertical movement driving mechanism 360 is in driving connection with the longitudinal vertical movement driving mechanism 350, and the processing tool bit mechanism 370 is in driving connection with the horizontal vertical movement driving mechanism 360. The machining head mechanism 370 is disposed above the base 310. In the present embodiment, the horizontal-traverse-drive is a horizontal-traverse-drive motor.

As shown in fig. 3, in the present embodiment, the base 310 includes a seat 311 and a guide rod 312, and the guide rod 312 is disposed on the base 311; the processing platform 320 includes a platform connecting plate 321 and a platform bearing plate 322, the platform connecting plate 321 is provided with a plurality of guiding blocks 323, the guiding blocks 323 are provided with through holes (not shown), and the through holes are matched with the guiding rods 312, so that the platform connecting plate 321 is slidably disposed along the guiding rods 312.

As shown in fig. 3, in the present embodiment, the platform loading plate 322 is connected to the platform connecting plate 321 by bolts 324. In a preferred embodiment, the platform connecting plate 321 and the platform supporting plate 322 are both of a quadrilateral structure, and the four corners of the platform connecting plate 321 and the platform supporting plate 322 are both provided with connecting through holes (not shown), and the bolts 324 sequentially pass through the connecting through holes of the platform connecting plate 321 and the connecting through holes of the platform supporting plate 322. In the present embodiment, the angle of the platform supporting plate 322 is finely adjusted by adjusting the tightness degree of the bolts 324; this ensures that the platform carrier plate 322 is maintained at a high level of accuracy by the adjustment bolts 324, thereby ensuring high accuracy machining of the parts.

As shown in fig. 4, in the present embodiment, the machining-tip mechanism 370 includes: the connection body 371, the bit driver, the driving gear 372, the driven gear 373, and the bit 374. The connecting body 371 is in driving connection with the horizontal longitudinal movement driving mechanism 360, the driving gear 372 is arranged on the connecting body 371, the driving gear 372 is in driving connection with the cutter head driver, the driven gear 373 is meshed with the driving gear 372, and the cutter head 374 is in driving connection with the driven gear 373. As shown in fig. 2, the longitudinal vertical movement driving mechanism 350 includes a longitudinal vertical movement driving motor 351 and a longitudinal vertical movement driving screw 352 drivingly connected to the longitudinal vertical movement driving motor 351; the horizontal translation driving mechanism 360 includes a horizontal translation driving motor 361 and a horizontal translation driving lead screw 362 drivingly connected to the horizontal translation driving motor 361. The tool bit driver is a tool bit driving motor.

The operation of the numerically controlled machine tool 10 with multiple degrees of freedom is described below (please refer to fig. 1 to 4 together):

before the parts are machined, the platform bearing plate 322 is ensured to be kept accurately horizontal by adjusting each bolt 324; then, placing the part to be machined on the platform bearing plate 322;

inputting relevant information and corresponding processing parameters of the part to be processed on the touch display screen 40; the control device of the numerical control machine tool 10 with multiple degrees of freedom outputs corresponding control information to accurately control the outputs of the horizontal movement driving motor, the longitudinal vertical movement driving motor 351, the horizontal longitudinal movement driving motor 361 and the cutter head driving motor; the horizontal traversing driving motor indirectly controls the part in the horizontal traversing direction by driving the processing platform 320 to reciprocate in the horizontal traversing direction; the longitudinal vertical movement driving motor 351 indirectly drives the cutter head 374 to reciprocate in the longitudinal vertical movement direction through the longitudinal vertical movement driving screw 352; the horizontal longitudinal movement driving motor 361 indirectly drives the cutter head 374 to reciprocate in the horizontal longitudinal movement direction through the horizontal longitudinal movement driving lead screw 362; therefore, the tool setting head 374 is controlled by three degrees of freedom, so that the numerical control machine tool 10 can carry out multi-dimensional processing on parts from multiple directions, the processing effect is good, and the processing efficiency is high;

the tool bit driving motor outputs through the driving gear 372, and therefore power is transmitted to the driven gear 373, and the driven gear 373 transmits power to the tool bit 374, so that the tool bit 374 can machine parts.

Although the numerical control machine tool 10 with multiple degrees of freedom realizes the processing of the parts with multiple degrees of freedom, the processing efficiency is obviously improved; however, a specific control command for the nc machine tool 10 is input through the touch display 40, and a machining state of a part and state information of the nc machine tool 10 itself are displayed in real time through the touch display 40. Therefore, whether the numerical control machine tool 10 can work normally is directly affected by whether the touch display screen 40 works normally or not.

However, the touch screen 40 is exposed to the air in the workshop, which contains a lot of dust and debris generated during the manufacturing process; dust and debris are easily deposited on the touch display screen 40; moreover, the touch display screen 40 is easily scratched, and has no good waterproof effect. In order to better protect the touch display screen 40, the touch display screen 40 needs to be covered when the numerical control machine tool 10 is not in use, so that the touch display screen 40 is ensured not to be exposed in the air of a workshop any more, and therefore the dustproof, scratch-resistant and waterproof effects are achieved on the touch display screen 40, and the touch display screen 40 is effectively protected.

As shown in fig. 1, 5 and 6, the machine tool housing 20 of the present invention is further provided with a protective outer frame 50 and a protective panel 60, the touch display screen 40 is nested and installed on the upper portion of the protective outer frame 50, the protective panel 60 is matched with the protective outer frame 50, and when the numerical control machine tool 10 operates, the protective panel 60 slides down and opens; when the numerical control machine tool 10 is idle, the protection panel 60 slides upwards and covers the touch display screen 40, so that the touch display screen 40 is prevented from being exposed in the air of a workshop, the dustproof, scratch-resistant and waterproof effects are achieved, and the touch display screen 40 is effectively protected.

As shown in fig. 5 and 6, the protective frame 50 is divided into an upper portion and a lower portion, the touch display screen 40 is nested and installed on the upper portion of the protective frame 50, the protective panel 60 slides along the protective frame 50, and when the protective panel 60 slides to the upper portion of the protective frame 50, the protective panel 60 covers the touch display screen 40 to protect the touch display screen 40; when the protection panel 60 slides down to the lower portion of the protection frame 50, the touch display screen 40 is exposed.

In order to protect the touch display screen 40, when the numerical control machine tool 10 is in an idle state, the protection panel 60 needs to cover the touch display screen 40 to protect the touch display screen 40. However, in practical applications, it is difficult to avoid the situation that the non-working person opens the protection panel 60 and exposes the touch display screen 40 in the air of the workshop; or the worker may open the protection panel 60 that should be in the closed state due to an incorrect operation, so that the touch display screen 40 is exposed to the air in the workshop. In order to avoid that a non-worker who is not familiar with the numerical control machine tool 10 easily opens the protection panel 60 or a worker mistakenly opens the protection panel 60, the present invention provides the following designs for the structures of the protection panel 60 and the protection frame 50, and the cooperation between the protection panel 60 and the protection frame 50:

as shown in fig. 5, 6 and 7, a seesaw-type guide groove 510 is provided at a lower portion of the protection frame 50; a seesaw-type rotation column 610 is provided on the rear surface of the protection panel 60; the rocker-type rotation post 610 is rotatably inserted into the rocker-type guide groove 510 and slidably disposed along the rocker-type guide groove 510.

As shown in fig. 5, 6 and 7, a first guide groove 520 is formed at one side of the protection frame 50, an engagement protrusion 620 is formed at one side of the back surface of the protection panel 60, and the engagement protrusion 620 is slidably disposed along the first guide groove 520. And, the matching protrusion 620 is connected to the first guiding groove 520 through the cover return spring 100, and the cover return spring 100 provides elastic restoring force for the matching protrusion 620 so that the protection panel 60 has a tendency of covering the touch display screen 40.

As shown in fig. 7 and 8, a second guide groove 530 is formed on the other side of the protection frame 50, a sliding connection block 200 is slidably disposed in the second guide groove 530, and the sliding connection block 200 is connected to the back surface of the protection panel 60 through a rocker return spring 300.

As shown in fig. 5, 6 and 7, the protection panel 60 is provided with a fitting latch 630, the lower portion of the protection outer frame 50 is provided with a cover holding protrusion 540 and a reset-preventing stopper 550, and the cover holding protrusion 540 and the reset-preventing stopper 550 are spaced apart from each other. The fitting latch 630 is engaged with or disengaged from the cover holding protrusion 540, and the fitting latch 630 is engaged with or disengaged from the anti-reset stopper 550. As shown in fig. 8, in a preferred embodiment, an arc-shaped guide surface 541 is provided on a side of the cover holding projection 540 away from the touch display panel 40.

As shown in fig. 7 and 8, the rocker return spring 300 and the cover holding protrusion 540 are respectively disposed at both sides of the rocker guide groove 510. The cover holding protrusion 540 and the reset prevention stopper 550 are disposed at the same side of the seesaw-type guide groove 510.

As shown in fig. 7, in the present embodiment, the number of the anti-reset stoppers 550 is multiple, and the multiple anti-reset stoppers 550 are arranged at intervals to form a multi-stage anti-reset block for the mating latch 630.

As shown in fig. 7, in the present embodiment, the back surface of the protection panel 60 is further provided with an in-position reminding block 640, and the in-position reminding block 640 is in contact with or separated from the bottom edge of the protection outer frame 50.

As shown in fig. 8 and 9, in the present embodiment, the radial cross section of the see-saw guide groove 510 is arc-shaped; the radial cross section of the portion of the rocker-type rotation column 610 accommodated in the rocker-type guide slot 510 is an arc-shaped structure. Such cooperation enables, on one hand, rocker-type rotary column 610 to reciprocally slide along an axial direction of rocker-type guide slot 510, and, on the other hand, rocker-type rotary column 610 to reciprocally rotate along a radial direction of rocker-type guide slot 510; when the rocker rotation column 610 rotates back and forth along the radial direction of the rocker guide groove 510, the protection panel 60 performs a rocker motion with the rocker rotation column 610 as a fulcrum; this enables the protective panel 60 to cover and open the touch display screen 40.

The operation principle of the opening and closing of the protection panel 60 will be described below (please refer to fig. 1, 5 to 9):

when the protection panel 60 is covered on the touch display screen 40 (at this time, as an initial covering state), under the elastic force of the rocker return spring 300, one side of the protection panel 60 connected to the rocker return spring 300 is tilted upward, and one side away from the rocker return spring 300 is lowered, so that the protection panel 60 is in an inclined state; at this time, the matching fixture block 630 is clamped with the cover keeping projection 540 at the side of the protection panel 60 pressed downwards, and the cover return spring 100 is in an extending state; in this initial state, since the fitting latch 630 is engaged with the covering and retaining projection 540, the protection panel 60 cannot be directly slid downward;

if the protection panel 60 is opened to expose the touch display 40, the upturned side of the protection panel 60 needs to be pressed first; when the upward-tilted side of the protection panel 60 is pressed, the rocker-type rotation column 610 rotates along the rocker-type guide groove 510, that is, the protection panel 60 rotates with the rocker-type guide groove 510 as a fulcrum; during this process, rocker return spring 300 is constantly compressing and accumulating elastic potential energy;

when the protection panel 60 rotates to the horizontal state, the fitting latch 630 and the covering maintaining projection 540 are in a separated state; at this time, the protection panel 60 slides downwards, so that the touch display screen 40 is gradually exposed; in the process of the protective panel 60 sliding down, the rocker-type rotation column 610 slides down along the rocker-type guide groove 510; when the protection panel 60 slides down, the rocker return spring 300 and the sliding connection block 200 are driven to slide down together, and at this time, the sliding connection block 200 slides along the second guide groove 530; meanwhile, the engagement protrusion 620 slides down along with the protection panel 60 and continuously compresses the closing return spring 100 so that the closing return spring 100 continuously accumulates elastic potential energy;

when the protection panel 60 slides down to the proper position, the side of the protection panel 60 provided with the matching fixture block 630 is pressed down, and then the hand can be released; when the side of protection panel 60 provided with mating latch 630 is pressed down, rocker-type rotation column 610 rotates along rocker-type guide groove 510 again, i.e., protection panel 60 generates rocker movement again with rocker-type guide groove 510 as a fulcrum; at the same time, rocker return spring 300 continues to extend and release elastic potential energy; when one side of the protection panel 60, which is provided with the matching fixture block 630, sinks, the matching fixture block 630 is firmly clamped with one of the anti-reset blocking blocks 550; at this time, the hand is released, and the protection panel 60 is stably maintained in the current tilted state (in this case, the opened state); in short, when the protection panel 60 is opened, a worker needs to press the protection panel 60 first, then slide the protection panel 60 downward, and press the protection panel 60 again after sliding the protection panel 60 downward to a proper position, so that the protection panel 60 is firmly clamped with one of the anti-reset blocking blocks 550; through a multi-step accurate operation mode, the protection panel 60 is effectively prevented from being opened to expose the touch display screen 40 due to misoperation, and meanwhile, the touch display screen 40 in an idle state is prevented from being easily opened to expose by non-working personnel;

when the protection panel 60 needs to be covered again, the upwarped side of the protection panel 60 is pressed again; when the upward-tilted side of the protection panel 60 is pressed, the rocker-type rotation column 610 rotates along the rocker-type guide groove 510, that is, the protection panel 60 rotates with the rocker-type guide groove 510 as a fulcrum; during this process, rocker return spring 300 is constantly compressing and accumulating elastic potential energy; when the protection panel 60 rotates to a horizontal state, the mating latch 630 is separated from the reset prevention stopper 550; at this time, the protection panel 60 is slid upward for a certain distance, that is, after the matching fixture block 630 leaves the position right above the plurality of anti-reset blocking blocks 550, the hand can be released; after the hands are loosened, the protection panel 60 is rapidly reset towards the direction close to the touch display screen 40 under the action of the elastic restoring force of the covering reset spring 100 until the touch display screen 40 is completely covered by the protection panel 60; when the touch display screen 40 is completely covered by the protection panel 60, the protection panel 60 is restored to the initial state; at this time, under the elastic force of the rocker return spring 300, the side of the protection panel 60 connected to the rocker return spring 300 is kept tilted up, and the side away from the rocker return spring 300 is kept sunk, so that the protection panel 60 is kept in a tilted state;

in the process of sliding the protection panel 60 along the protection outer frame 50 to be restored, the protection panel 60 also generates the seesaw movement again under the elastic restoring force of the seesaw restoring spring 300; namely, the protective panel 60 rotates while sliding up; when the protection panel 60 slides up to the matching fixture block 630 to contact with the covering and keeping lug 540, at the moment that the matching fixture block 630 contacts with the covering and keeping lug 540, the matching fixture block 630 contacts with the arc-shaped guide surface 541 of the covering and keeping lug 540 and smoothly passes over the covering and keeping lug 540 under the guide of the arc-shaped guide surface 541; the design of the arc-shaped guide surface 541 ensures that the matching fixture block 630 smoothly passes over the covering and maintaining bump 540 in the sliding and resetting process, thereby ensuring that the protection panel 60 smoothly resets and finally covers the touch display screen 40; in short, when the touch display screen 40 is covered, the user needs to press, push up and release the hand, and through a multi-step accurate operation mode, misoperation is effectively avoided to cover the touch display screen 40, and meanwhile, non-working personnel are prevented from easily covering the touch display screen 40 in work;

it should be noted that, at the moment that the fitting latch 630 passes over the covering and retaining protrusion 540, the protection panel 60 generates the seesaw movement under the upward lifting force of the covering and retaining protrusion 540 again with the seesaw-type guide groove 510 as the fulcrum; when the fitting latch 630 passes over the covering maintaining protrusion 540, the protection panel 60 is restored to the tilted state by the seesaw movement again under the elastic restoring force of the seesaw return spring 300; in short, two opposite tilting movements of the protection panel 60 occur at two moments when the mating latch 630 passes over the covering and retaining bump 540 and after passing over the covering and retaining bump 540, so as to ensure that the protection panel 60 is smoothly reset and is finally stably retained in a state of covering the touch display screen 40;

therefore, the rocker rotation column 610, the rocker guide groove 510, the sliding connection block 200, the rocker return spring 300 and the fitting latch 630, the lid holding protrusion 540, the arc guide surface 541 of the lid holding protrusion 540, the anti-return blocking block 550, etc. are closely fitted with each other and are not independent from each other; the structures of the invention are mutually matched to ensure that the opening and the closing of the touch display screen 40 can be accurately, smoothly and quickly operated and realized under the condition that a worker familiar with the numerical control machine 10 applies certain attention; due to the design, the touch display screen 40 is effectively prevented from being opened or closed randomly by non-workers, and meanwhile, misoperation of the workers is also effectively avoided; the invention has certain complexity to the operation of opening and closing the touch display screen 40 to prevent other people from operating randomly and misoperation, but does not influence the normal production efficiency due to too complicated operation, namely, a proper balance point is found between the complexity and the simplicity;

in addition, when the protective panel 60 slides down to the proper position, the proper position prompting block 640 collides with the bottom edge of the protective outer frame 50 to generate an impact sound and simultaneously generates a downward sliding resistance, thereby prompting the worker to protect the protective panel 60 from sliding down to the proper position;

the invention is provided with a plurality of anti-reset blocking blocks 550, thereby forming multi-stage anti-reset limitation, so that clamping can be realized without matching the clamping block 630 with the anti-reset blocking blocks 550 to be strictly and accurately aligned when the protective panel 60 slides downwards; that is, the downward sliding position of the protection panel 60 is not required to be very accurate, and the protection panel 60 only needs to slide down to the position above the region formed by the multiple anti-return blocking blocks 550 by the matching fixture blocks 630, so that the operation is more convenient and efficient;

moreover, the covering and holding projection 540 and the reset prevention block 550 are arranged at intervals; with such a design, after the one side of the protection panel 60 that is tilted up is pressed, the protection panel 60 slides down to the position between the covering maintaining bump 540 and the anti-reset blocking block 550, and the protection panel 60 automatically resets to the covering state under the action of the elastic restoring force of the covering reset spring 100, so as to ensure that the touch display screen 40 is covered again by the protection panel 60; such a design is effective to prevent a non-worker unfamiliar with the numerical control machine 10 from easily opening the protective panel 60 to partially expose the touch display screen 40; meanwhile, the misoperation condition that the touch display screen 40 is partially exposed due to the fact that the protection panel 60 slides downwards for a certain distance after the upper side and the upper side are pressed by mistake is also effectively avoided.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.