CN213649093U - Position adjusting mechanism - Google Patents

Abstract

The utility model relates to a stamp equipment field discloses a position control mechanism, and it can be used to screen frame fixing device. The position adjustment mechanism includes: a drive motor; the driving motor is used for driving the screw to rotate; an internally threaded member with which the threaded rod is threadedly engaged and which, when rotated, drives translation of the internally threaded member. The driving motor is equipped with adjusting hand wheel keeping away from the one end of screw rod, adjusting hand wheel with the screw rod is connected for through manual rotatory adjusting hand wheel and drive the screw rod is rotatory. Through the structure, the position adjusting mechanism is driven by the motor, so that the position adjusting mode can realize automatic adjustment, and the adjusting speed and the adjusting precision can be obviously improved; meanwhile, the motor is additionally provided with the adjusting hand wheel, so that the motor can still be manually adjusted when the motor fails, and the adjusting mode is more flexible.

Description

Position adjusting mechanism

Technical Field

The utility model discloses embodiment relates to the technical field of printing equipment, especially relates to a position control mechanism, and it can be applied to screen frame fixing device.

Background

In the printing operation of the printing equipment, the scraper needs to move back and forth to scrape the screen frame, so that the dye on the screen frame falls into the cloth, and the printing work of the cloth is finished. The screen frame is generally fixed on the printing arm through a fixing device, and the fixing device needs to adjust the position so that the screen frame, the scraper and the cloth can be accurately aligned, and the accurate positioning precision can be guaranteed.

Currently, automated printing equipment with a relatively high degree of automation, such as elliptical printing machines or elliptical digital printing machines, is developed on the market. In such an automatic printing apparatus, in order to ensure printing quality, the screen frame mounted on the screen frame fixing device also needs to be adjusted in the register position before printing processing. However, the current adjustment of the frame set is performed by manually twisting the fine adjustment handle, which makes it difficult to adjust the frame set at one time, and often requires the operator to go back and forth to try until the required frame set is reached. Therefore, in the current automatic printing equipment, the problems of low efficiency and low precision of sleeve position adjustment still exist, which further affects the productivity and the subsequent printing quality.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the embodiment of the utility model provides a position control mechanism to solve the technical problem of the inefficiency that manual cover position adjustment leads to.

In order to solve the technical problem, an embodiment of the utility model provides a following technical scheme: there is provided a position adjustment mechanism including: a drive motor; the driving motor is used for driving the screw to rotate; an internally threaded member with which the threaded rod is threadedly engaged and which, when rotated, drives translation of the internally threaded member. The driving motor is equipped with adjusting hand wheel keeping away from the one end of screw rod, adjusting hand wheel with the screw rod is connected for through manual rotatory adjusting hand wheel and drive the screw rod is rotatory.

In some embodiments, the position adjusting mechanism further comprises a guide rod and a guide rod fixing part, the guide rod penetrates through the internal thread part and is in sliding fit with the internal thread part, and the guide rod is fixed on the guide rod fixing part; the screw rod penetrates through the guide rod fixing piece, threads are arranged at the tail end of the screw rod far away from the driving motor, a screw cap and a first plane bearing are installed at the tail end of the screw rod, and the screw cap presses the first plane bearing on the guide rod fixing piece.

In some embodiments, the guide rod holder is provided with a second planar bearing on the screw rod on a side close to the drive motor, and the second planar bearing is pressed against the guide rod holder.

In some embodiments, the number of the guide rods is two, the guide rod fixing part comprises two fixing plates which are oppositely arranged, the internal thread part is located between the fixing plates, and the two guide rods are located on two sides of the screw rod.

In some embodiments, the position adjustment mechanism further comprises an inductive switch fixedly mounted with respect to the drive motor and configured to generate a control signal when touched by a component carried by the internal threaded member.

In some embodiments, the inductive switch is a zero reset inductive switch.

In some embodiments, the position adjustment mechanism further comprises a motor cover plate, the inductive switch is mounted on the motor cover plate, the drive motor is fixedly mounted on one side of the motor cover plate, and the inductive switch has a button extending beyond the motor cover plate in a direction away from the drive motor.

In some embodiments, the drive motor is a stepper motor.

In some embodiments, the position adjustment mechanism further comprises a motor housing, the drive motor being disposed within the motor housing.

In some embodiments, the adjustment handwheel is located outside the motor housing.

The utility model discloses embodiment's beneficial effect is: the embodiment of the utility model provides a position adjusting mechanism, because adopt motor drive in the position adjusting mechanism, therefore the mode of position adjustment can realize automatic regulation, and speed and the precision of adjusting can both show and improve, thereby can improve the efficiency of cover position precision fine setting when making and being applied to the net frame fixing device; meanwhile, the motor is additionally provided with the adjusting hand wheel, so that the motor can still be manually adjusted when the motor fails, and the adjusting mode is more flexible; in addition, when the two sides of the guide rod fixing part are respectively provided with the plane bearings and the screw cap is screwed at the tail end of the screw rod, the axial movement of the screw rod and the guide rod fixing part can be effectively eliminated, and the adjusting precision is ensured.

Drawings

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

Fig. 1 is a schematic perspective exploded view of a position adjustment mechanism according to an embodiment of the present invention;

fig. 2 is a schematic view of a three-dimensional assembly structure of a net frame fixing device according to an embodiment of the present invention;

fig. 3 is a schematic perspective exploded view of the frame fixing device of fig. 2;

fig. 4 is a schematic perspective exploded view of a first frame position adjustment assembly of the frame fixing apparatus of fig. 2;

fig. 5 is a schematic perspective exploded view of a second frame position adjustment assembly of the frame fixing apparatus of fig. 2.

Part list: the position adjusting mechanism 42, the driving motor 421, the screw 422, the internal thread member 423, the guide rod 424, the guide rod fixing member 425, the screw cap 426, the first plane bearing 427, the second plane bearing 428, the adjusting hand wheel 429, the inductive switch 430, the motor housing 432, the motor cover 433, the net frame 600, the rod 601,602,603,604, the net frame fixing device 100, the support arm 10, the first end 11, the second end 12, the first net frame position adjusting assembly 20, the first net frame top plate 21, the positioning column 210, the position pointer 211, the first X-axis adjusting mechanism 22, the first driving motor 221, the first lead screw 222, the first internal thread member 223, the guide rod 224, the guide rod fixing member 225, the screw cap 226, the first plane bearing 227, the second plane bearing 228, the first adjusting hand wheel 229, the first inductive switch 230, the guide assembly 231, the motor housing 232, the motor cover 233, the first Y-axis adjusting mechanism 24, the second driving motor 241, the second screw 242, the, A third adjusting handwheel 243, a second inductive switch 244, a motor housing 245, a guide rod 246, a fixing plate 247, a spring 248, a fixing column 249, a first Z-axis adjusting mechanism 26, a fixing seat 261, a second adjusting handwheel 262, a first screw 263, a linkage block 264, a first housing 28, a first chute 282, a second screen frame position adjusting component 30, a second screen frame top plate 31, a positioning column 310, a position pointer 311, a second X-axis adjusting mechanism 32, a second driving motor 321, a second lead screw 322, a second internal thread 323, a guide rod 324, a guide rod fixing part 325, a nut 326, a second plane bearing 327, a second plane bearing 328, a second adjusting handwheel 329, a second inductive switch 330, a guide component 331, a motor housing 332, a motor cover plate 333, a second Y-axis adjusting mechanism 34, an air cylinder 341, a second Z-axis adjusting mechanism 36, a fixing seat 361, an adjusting handwheel 362, a screw 363, a linkage block 364, a first Z-axis adjusting mechanism 249, the second housing 38, the slide groove 381, the third slide groove 382, the width direction X, the length direction Y, and the height direction Z.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. 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 be present. The terms "lower end", "lower side", "left", "right" and the like as used herein are for illustrative purposes only.

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 in the description of the invention herein 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.

Referring to fig. 1, a position adjustment mechanism 42 according to some embodiments of the present invention is provided, which can be used for a frame fixing device of a printing apparatus to adjust a position in a certain direction, especially to fine-tune the position.

As shown, the position adjustment mechanism 42 of one embodiment may include a drive motor 421, a screw 422, an internally threaded member 423, and an adjustment handwheel 429. The driving motor 421 is used for driving the screw 422 to rotate, and the screw 422 is in threaded fit with the internal thread 423 and drives the internal thread 423 to translate when rotating. An adjusting handwheel 429 is arranged at one end of the driving motor 421 far away from the screw 422, and is connected with the screw 422 for driving the screw 422 to rotate by manually rotating the adjusting handwheel 429.

In a further embodiment, the position adjustment mechanism 42 may further include a guide rod 424 and a guide rod fixing member 425, the guide rod 424 passes through the internal screw member 423 and is slidably engaged with the internal screw member 423, and the guide rod 424 is fixed to the guide rod fixing member 425; the screw 422 passes through the guide rod fixing member 425 and has a screw thread at an end of the screw 422 remote from the driving motor 421, a nut 426 and a first plane bearing 427 are installed on the end of the screw 422, and the nut 426 presses the first plane bearing 427 against the guide rod fixing member 425.

In a further embodiment, the guide rod holder 425 is provided with a second planar bearing 428 fitted over the screw 422 on a side close to the driving motor 421, and the second planar bearing 428 is pressed against the guide rod holder 425.

In some embodiments, the number of the guide rods 424 may be two, the guide rod fixing member 425 includes two fixing plates disposed opposite to each other, the internal screw 423 is located between the fixing plates, and the two guide rods 424 are located at both sides of the screw 422.

In some embodiments, the position adjustment mechanism 42 further includes an inductive switch 430, and the inductive switch 430 is fixedly installed relative to the driving motor 421 and is used for generating a control signal when being touched by a component driven by the internal thread member 423. Preferably, the inductive switch 430 may be a zero-reset inductive switch, so that a reset operation may be performed before each adjustment, that is, the position of the first screen frame top plate 21 is reset to a preset position with respect to the first driving motor 221, and the preset position may be referred to as a zero position.

In some embodiments, the position adjustment mechanism 42 further includes a motor cover 433, the inductive switch 430 is mounted on the motor cover 433, the driving motor 421 is fixedly mounted on one side of the motor cover 433, and the inductive switch 430 has a button extending beyond the motor cover 433 in a direction away from the driving motor 421.

In some embodiments, the driving motor 421 may be a stepping motor. In other embodiments, the position adjustment mechanism 42 may further include a motor housing 432, and the driving motor 421 is disposed within the motor housing 432. Further, the adjustment handwheel 429 may be located outside the motor housing 432.

Since the position adjustment mechanism 42 is driven by a motor, it can adjust the position in a certain direction, especially, perform fine adjustment, and the efficiency of the position adjustment is high. Thus, the adjustment assembly of the various embodiments of the present application may be applied to a frame fixture.

The frame fixing device 100 using the position adjusting mechanism of the present application will be described in detail with reference to fig. 2 to 5; the position adjusting mechanism of the present application can be embodied as the first X-axis adjusting mechanism 22, the first Y-axis adjusting mechanism 24, and the second X-axis adjusting mechanism 32 in the frame fixing device 100. Accordingly, the features and advantages of the position adjustment mechanism of the present application will become more apparent from the description of the first X-axis adjustment mechanism 22, the first Y-axis adjustment mechanism 24, and the second X-axis adjustment mechanism 32.

Referring to fig. 2 and 3, a screen frame fixing device 100 according to an embodiment of the present invention can be applied to a printing apparatus, such as an elliptical printing machine or an elliptical digital printing machine. The frame fixing device 100 is used for fixing the frame 600 and adjusting, particularly fine-tuning, the position of the frame 600 in three dimensions.

The frame fixing apparatus 100 mainly includes a support arm 10, a first frame position adjusting assembly 20, and a second frame position adjusting assembly 30. The support arm 10 has opposite first and second ends 11, 12. The first frame position adjustment assembly 20 is mounted to the first end 11 of the support arm 10 and the second frame position adjustment assembly 30 is mounted to the second end 12 of the support arm 10. The support arm 10 may be further connected to other drive mechanisms of the printing apparatus to be moved by the drive mechanisms to move the first frame position adjustment assembly 20 and the second frame position adjustment assembly 30.

The first frame position adjustment assembly 20 and the second frame position adjustment assembly 30 are oppositely disposed for securing the frame 600 therebetween. For example, the frame 600 may be a generally rectangular frame formed by connecting four bars 601,602,603,604 in sequence, and a wire mesh may be further fixed therein. The bar members 601 and 603 extend along the width direction X of the frame 600, the bar members 602 and 604 extend along the length direction Y of the frame 600, and a direction perpendicular to both the width direction X and the length direction Y can be defined as the height direction Z of the frame 600. Two locator sleeves 605 may be mounted on the side of the rod 601 facing the first frame position adjustment assembly 20 and two locator sleeves 605 may be mounted on the side of the rod 603 facing the second frame position adjustment assembly 30. Accordingly, two positioning posts 310 may be mounted on the side of the second frame position adjustment assembly 30 facing the bar 603, and two positioning posts 210 may be mounted on the side of the first frame position adjustment assembly 20 facing the bar 601 (see fig. 4). When the positioning device is installed, the screen frame 600 can be fixed by sleeving the two positioning sleeves 605 on the two positioning columns 210 from one side, aligning the two positioning sleeves 605 with the two positioning columns 310 on the other side, and driving the two positioning columns 310 to insert into the corresponding two positioning sleeves 605. It will be readily appreciated that the positioning locations of the positioning sleeve 605 and the positioning posts 210, 310 may be interchanged, for example, by positioning the positioning sleeve 605 on the opposite side of the first frame position adjustment assembly 20 and the second frame position adjustment assembly 30 from each other and positioning the positioning posts on the bar members 601 and 603 of the frame 600. In such a way, the screen frame 600 can be conveniently assembled and disassembled, and is stably fixed in a four-point mode, so that the screen frame 600 can be prevented from being driven to jump when the supporting arm 10 is lifted or pressed down, higher repeated positioning accuracy can be guaranteed, a good printing effect can be achieved, meanwhile, the positioning columns 210 and 310 are prevented from being worn due to frequent jumping of the screen frame 600, and the printing accuracy after the screen frame 600 is stably fixed and positioned by the four positioning columns 210 and 310 for a long time can be guaranteed.

Referring to fig. 4, there is shown a schematic perspective exploded view of the first frame position adjustment assembly 20 of the frame fixing apparatus 100 of the present application. In one embodiment, the first frame position adjustment assembly 20 includes a first frame top plate 21, a first X-axis adjustment mechanism 22, a first Y-axis adjustment mechanism 24, and a first Z-axis adjustment mechanism 26. The first X-axis adjusting mechanism 22 is connected to the first frame top plate 21 and is configured to drive the first frame top plate 21 to move along the width direction X of the frame 600. The first Y-axis adjusting mechanism 24 is connected to the first frame top plate 21 and the first Z-axis adjusting mechanism 26 and is configured to drive the first frame top plate 21 to move along the length direction Y of the frame 600 relative to the first Z-axis adjusting mechanism 26. The first Z-axis adjusting mechanism 26 is connected to the first frame top plate 21 and is configured to drive the first frame top plate 21 to move along the height direction Z of the frame 600. It is noted that "connected" as referred to herein can be directly connected or indirectly connected. For example, the "first Y-axis adjusting mechanism 24 is connected to the first frame top plate 21" means that the first Y-axis adjusting mechanism 24 can be connected to the first frame top plate 21 through an intermediate transmission mechanism, instead of requiring the first Y-axis adjusting mechanism 24 to be directly connected to the first frame top plate 21. Due to the adoption of the first X-axis adjusting mechanism 22, the first Y-axis adjusting mechanism 24 and the first Z-axis adjusting mechanism 26, the first frame position adjusting assembly 20 can realize the adjustment of the first frame top plate 21 in the three-dimensional direction.

Referring to fig. 5, it is a schematic perspective exploded view of the second frame position fine-tuning unit 30 of the frame fixing device 100 of the present application. In one embodiment, the second frame position adjusting assembly 30 includes a second frame top plate 31, a second X-axis adjusting mechanism 32, a second Y-axis adjusting mechanism 34, and a second Z-axis adjusting mechanism 36; the first screen frame top plate 21 and the second screen frame top plate 31 are oppositely arranged and used for fixing the screen frame 600 therebetween. The second X-axis adjusting mechanism 32 is connected to the second frame top plate 31 and configured to drive the second frame top plate 31 to move along the width direction X of the frame 600, the second Y-axis adjusting mechanism 34 is connected to the second frame top plate 31 and the second Z-axis adjusting mechanism 36 and configured to drive the second frame top plate 31 to move along the length direction Y of the frame 600 relative to the second Z-axis adjusting mechanism 36, and the second Z-axis adjusting mechanism 36 is connected to the second frame top plate 31 and configured to drive the second frame top plate 31 to move along the height direction Z of the frame 600. Similarly, the term "coupled" as used herein may be directly coupled or indirectly coupled. Due to the adoption of the second X-axis adjusting mechanism 32, the second Y-axis adjusting mechanism 34 and the second Z-axis adjusting mechanism 36, the second frame position fine-tuning group 30 can realize the adjustment of the second frame top plate 31 in the three-dimensional direction.

Wherein at least one of the first X-axis adjustment mechanism 22, the first Y-axis adjustment mechanism 24, and the second X-axis adjustment mechanism 32 is driven by a motor; that is, a motor such as a stepping motor is used as a power device in the adjusting mechanisms, and then a transmission structure in the adjusting mechanisms is driven to drive the first screen frame top plate 21 and the second screen frame top plate 31 to move in the three-dimensional direction, and finally, the adjustment of the position of the screen frame 600 sandwiched between the first screen frame top plate 21 and the second screen frame top plate 31 is realized. Because at least one of the first X-axis adjusting mechanism 22, the first Y-axis adjusting mechanism 24, and the second X-axis adjusting mechanism 32 is driven by a motor, compared with the manner of manually twisting the fine adjustment handle to adjust the position in the prior art, the automatic adjustment can be realized, and the speed and the precision of the adjustment can be significantly improved, the efficiency of the mesh frame fixing device 100 in the application to the position adjustment is higher. For example, when the motor is used for driving, the position deviation signal detected by the detection system can control the driving of the motor revolution number through the control system, so that a certain revolution number of the motor is converted into corresponding linear movement, and the position adjustment is more accurate.

In one embodiment, as shown in fig. 3, 4 and 5, two positioning posts 210 are mounted on the first top frame plate 21 to be inserted into and engaged with two positioning sleeves 605 on the rod members 601 of the frame 600. Two positioning posts 310 are mounted on the second top frame plate 31 to be inserted into and engaged with two positioning sleeves 605 on the rods 603 of the frame 600. Because the first net frame top plate 21 and the second net frame top plate 31 directly clamp the net frame 600, the positioning columns 210 and 310 arranged on the first net frame top plate 21 and the second net frame top plate 31 can realize the precise connection between the first net frame top plate 21 and the second net frame top plate 31 and the net frame 600, and further realize the position adjustment of the net frame 600 by adjusting the positions of the first net frame top plate 21 and the second net frame top plate 31 correspondingly.

Referring again to fig. 4, in an embodiment, the first frame position adjusting assembly 20 may further include a first housing 28, and the first frame top plate 21 is disposed outside the first housing 28, for example, on a side of the first housing 28 facing the frame 600. The first X-axis adjustment mechanism 22 may include a first driving motor 221, a first lead screw 222, and a first female screw 223. The first drive motor 221 is mounted at one end of the first housing 28 such that the position of the main body portion of the first drive motor 221 relative to the first housing 28 remains fixed. The first screen frame top plate 21 is fixedly connected with the first internal thread piece 223; in this case, a sliding groove (see the sliding groove 381 in fig. 5) may be formed at a corresponding position of the first housing 28, so as to allow a connection portion between the first frame top plate 21 and the first internal screw member 223 to pass therethrough, and allow the connection portion to move back and forth in the sliding groove along the X direction. The first driving motor 221 is configured to drive the first lead screw 222 to rotate, for example, the first lead screw 222 may be directly or indirectly connected to a rotor of the first driving motor 221, so that the motor rotor drives the first lead screw 222 to rotate. The first lead screw 222 is in threaded fit with the first internal thread member 223 and drives the first internal thread member 223 to drive the first screen frame top plate 21 to translate when rotating. The first lead screw 222 may be a rod-shaped body with threads formed integrally or partially therein for engaging with the threads formed in the inner hole of the first female screw 223. Since the first X-axis adjusting mechanism 22 is driven by a motor, it can achieve automatic and efficient position adjustment.

In an embodiment, the first X-axis adjusting mechanism 22 may further include a guide rod 224 and a guide rod fixture 225, the guide rod 224 passes through the first internal thread 223 and is slidably engaged with the first internal thread 223, the guide rod 224 is fixed on the guide rod fixture 225, and the guide rod fixture 225 is fixed in the first housing 28. Wherein the sliding fit of the guide rod 224 and the first internal thread 223 is used to achieve a precise definition of the moving direction of the first internal thread 223, so that the movement of the first internal thread 223 in the X direction is stable.

In one embodiment, the first lead screw 222 passes through the guide rod fixture 225 and has threads at the end of the lead screw distal from the first drive motor 221. A nut 226 and a first plane bearing 227 are mounted at the end of the lead screw, and the nut 226 presses the first plane bearing 227 onto the guide rod fixing member 225. In this way, the axial position of the first lead screw 222 can be limited, so as to reduce or eliminate the looseness thereof in the axial direction, and reduce the error in the process of transmitting the driving action of the first driving motor 221 to the first screen frame top plate 21.

Further, the guide rod holder 225 may further include a second planar bearing 228 disposed on the first lead screw 222 on a side of the guide rod holder 225 close to the first driving motor 221, and the second planar bearing 228 is pressed against the guide rod holder 225. For example, a flange having an increased diameter may be formed at a position where the first lead screw 222 needs to abut against the second planar bearing 228, so that the second planar bearing 228 is pressed against the guide bar holder 225 by the flange. Alternatively, an abutment surface may be formed on an intermediate member for connecting the motor rotor and the first lead screw 222, so that the second flat bearing 228 is pressed against the guide bar holder 225 by this abutment surface. It is easily understood that when the first and second plane bearings 227 and 228 are respectively provided on both sides of the guide bar holder 225 and are screwed to the end of the first lead screw 222 by the nut 226, the axial movement of the first lead screw 222 and the guide bar holder 225 can be more effectively eliminated, that is, the generation of the first lead screw 222 in the X direction with respect to the guide bar holder 225 can be further prevented.

In an embodiment, as shown in fig. 4, the number of the guide rods 224 may be two, the guide rod fixing member 225 may include two fixing plates disposed opposite to each other, the first internal thread member 223 is located between the two fixing plates, and the two guide rods 224 are located at both sides of the first lead screw 222. With this structure, the movement of the first female screw 223 can be made more stable, reducing the movement in the other direction than the X direction.

In an embodiment, a first adjusting handwheel 229 is disposed at an end of the first driving motor 221 away from the first housing 28, and the first adjusting handwheel 229 is connected to the first lead screw 222 for driving the first lead screw 222 to rotate by manually rotating the first adjusting handwheel 229. In a further embodiment, the first X-axis adjustment mechanism 22 further comprises a motor housing 232, and the first drive motor 221 is disposed within the motor housing 232. The first adjustment handwheel 229 may be located outside the motor housing 232. Similarly, the connection of the first adjustment handwheel 229 to the first lead screw 222 may be an indirect connection; for example, the first adjustment handwheel 229 may be connected to a motor rotor of the first drive motor 221, which is in turn connected to the first threaded spindle 222. By additionally arranging the first adjusting hand wheel 229, manual adjustment can still be performed when the first driving motor 221 fails, so that the adjusting mode is more flexible.

In an embodiment, the first X-axis adjusting mechanism 22 further includes a first inductive switch 230, and the first inductive switch 230 is fixedly installed with respect to the first driving motor 221 and configured to generate a first control signal when being touched by the first screen frame top plate 21 or a first follow-up component on the first screen frame top plate 21. Preferably, the inductive switch is a zero reset inductive switch. In some embodiments, the first inductive switch 230 may be mounted on a motor cover 233, and the motor cover 233 may be secured to the first housing 28 such that the position of the first inductive switch 230 is fixed relative to the first housing 28. The first driving motor 221 is fixedly installed at one side of the motor cover plate 233, and the first induction switch 230 has a button extending beyond the motor cover plate 233 in a direction away from the first driving motor 221, the button being disposed toward the first screen frame top plate 21. Since the first screen frame top plate 21 will move under the driving of the first X-axis adjusting mechanism 22, it can be disposed to directly or indirectly touch the first inductive switch 230, for example, touch a button on the first inductive switch 230. Thus, when the button is actuated, it indicates that the position of the first frame top panel 21 is at one of its limits of travel; at this time, the first inductive switch 230 may generate an open signal or a close signal of the circuit or other signals as the control signal. The control signal may be transmitted to the control system of the first driving motor 221 so that the control system controls the first driving motor 221 to reset the position of the first frame top plate 21. In this way, the reset operation can be executed before each set adjustment.

In an embodiment, as shown in fig. 4, the first X-axis adjustment mechanism 22 may further include a guide assembly 231, wherein the guide assembly 231 is disposed in the first housing 28 and is away from the first lead screw 222; the guiding component 231 is connected with the first frame top plate 21 for guiding the translation of the first frame top plate 21. The guide member 231 may be similar to the guide rod 224, the guide rod fixing member 225, and the first female screw member 223, except that a female screw structure threadedly engaged with the first lead screw 222 is not required. By using the guide members 231 in combination with the guide rods 224 and the guide rod holders 225 described above, the movement of the first frame top plate 21 can be made more stable.

With continued reference to fig. 4, in one embodiment, the first Z-axis adjustment mechanism 26 may include a fixed seat 261, a second adjustment handwheel 262, a first threaded rod 263, and a linkage block 264. The fixed seat 261 is fixedly connected to the first end 11 (see fig. 2) of the support arm 10, and the second adjusting handwheel 262 is disposed in the fixed seat 261 and is used for manually driving the first screw 263 to rotate. The link block 264 is attached to the first casing 28, and is provided so as to be fixed to the first casing 28 in the height direction Z of the screen frame 600 and movable in the length direction Y of the screen frame 600. The first screw 263 can extend downwards from the second adjusting handwheel 262, and is in threaded fit with the linkage block 264, so as to drive the linkage block 264 to drive the first casing 28 and the first screen frame top plate 21 to translate when rotating. Since the first frame top plate 21 requires a small degree of adjustment in the Z direction, the first Z-axis adjustment mechanism 26 can be manually adjusted.

In an embodiment, the first Y-axis adjusting mechanism 24 may include a second driving motor 241 and a second screw 242, the second driving motor 241 is installed on a side of the first casing 28 away from the first frame top plate 21, the second screw 242 is in threaded fit with the linkage block 264, and the second driving motor 241 is used for directly or indirectly connecting the second screw 242 to drive the second screw 242 to rotate. Since the first Z-axis adjusting mechanism 26 is mounted on the fixing seat 261 and is drivingly connected to the linkage block 264, and the fixing seat 261 is used for being fixed to the supporting arm 10, actually, the linkage block 264 does not move in the Y-axis direction relative to the fixing seat 261, but the second screw 242 drives the first housing 28 and the first frame top plate 21 to translate when rotating. Further, a third adjusting hand wheel 243 is disposed at one end of the second driving motor 241 far away from the first casing 28, and the third adjusting hand wheel 243 is connected to the second screw 242, and is configured to drive the second screw 242 to rotate by manually rotating the third adjusting hand wheel 243. The second driving motor 241 may also be a stepping motor or the like. In addition, the first Y-axis adjustment mechanism 24 further includes a motor housing 245, and the second drive motor 241 is disposed inside the motor housing 245. The third adjusting handwheel 243 may be located outside the motor housing 245. Further, the linkage block 264 may also be slidably engaged with the guide bar 246 fixed to the first Y-axis adjusting mechanism 24 to stabilize the movement of the first screen frame top plate 21 in the Y direction. For example, a fixing plate 247 may be provided, which may be fixed to the inside or outside of the first housing 28, and the motor housing 245, the fixing plate 247, and the first housing 28 may be fixedly mounted to each other, and one end of the guide bar 246 may be fixed to the fixing plate 247.

In a further embodiment, a spring 248 may be further provided, one end of the spring 248 is connected to the fixing plate 247, and the other end thereof is inserted into the linkage block 264 such that the other end abuts against the inside of the linkage block 264, and the spring 248 is slidably fitted with the linkage block 264 in the Y-axis direction. The spring 248 is used for providing elastic force, on one hand, the second screw 242 is used for self-locking after the rotation adjustment is finished, and on the other hand, the second screw 242 is prevented from backing up due to a screw tooth fit clearance of the linkage block 264. In order to prevent the spring 248 from deforming, a fixing column 249 is convexly arranged on the inner side surface of the fixing plate 247, and the spring 248 is sleeved outside the fixing column 249.

In an embodiment, the first Y-axis adjusting mechanism 24 further includes a second inductive switch 244, and the second inductive switch 244 is fixedly installed relative to the second driving motor 241 and is configured to generate a second control signal when being touched by the fixed seat 261 or a second follow-up component on the fixed seat 261. For example, the second inductive switch 244 may be mounted within a motor housing 245. Since the first screen frame top plate 21 and the first housing 28 will move relative to the first Z-axis adjusting mechanism 26 under the driving of the first Y-axis adjusting mechanism 24, it can be arranged to directly or indirectly touch the second inductive switch 244 through the first Z-axis adjusting mechanism 26, for example, a button on the second inductive switch 244 arranged toward the first Z-axis adjusting mechanism 26 can be touched. Thus, when the button is actuated, it indicates that the position of the first frame top panel 21 is at one limit of its travel in the Y direction; at this time, the second inductive switch 244 may generate an open signal or a close signal of the circuit or other signals as the control signal. The control signal may be transmitted to a control system of the second driving motor 241 so that the second driving motor 241 is controlled by the control system to reset the position of the first frame top plate 21 in the Y direction.

In addition, in order to better accommodate the Z-direction displacement adjustment during the Y-direction displacement adjustment, the first casing 28 is provided with a first sliding groove 282 through which the first screw 263 passes and moves, and the first sliding groove 282 extends in the Y-direction.

In an embodiment, a position pointer 211 may be mounted on the first top frame plate 21, the position pointer 211 points to a side surface of the first casing 28, a fine adjustment scale is disposed at a position of the first casing 28 corresponding to the position pointer 211, and a fine adjustment displacement of the first top frame plate 21 is indicated through cooperation of the fine adjustment scale and the position pointer 211. In another embodiment, the positions of the position pointer 211 and the fine adjustment scale can be interchanged, that is, the position pointer is arranged on the first casing 28, and the scale is arranged on the top plate 21 of the first frame. By adopting the design, the displacement of the screen frame 600 can be intuitively indicated, and the operation action of an operator can be guided.

Referring again to fig. 5, in one embodiment, the second frame position adjustment assembly 30 further includes a second housing 38, and the second frame top plate 31 is disposed outside the second housing 38. Wherein the second X-axis adjustment mechanism 32 may have the same structure as the first X-axis adjustment mechanism 22. For example, the second X-axis adjusting mechanism 32 may include a second driving motor 321, a second lead screw 322, a second internal screw 323, a guide rod 324, a guide rod fixing member 325, a nut 326, a second planar bearing 327, a second planar bearing 328, a second adjusting handwheel 329, a second inductive switch 330, a guide assembly 331, a motor housing 332, and a motor cover 333. The second housing 38 defines a slide groove 381 for allowing a connection portion between the second frame top plate 31 and the second internal screw 323 to pass through, and allowing the connection portion to move back and forth in the slide groove 381 along the X direction. The connection and function of the above components of the second X-axis adjustment mechanism 32 can refer to those of the first X-axis adjustment mechanism 22, and are not described in detail herein.

In one embodiment, the second Z-axis adjustment mechanism 36 may have the same structure as the first Z-axis adjustment mechanism 26. For example, the second Z-axis adjustment mechanism 36 may include a fixing base 361, an adjustment handwheel 362, a screw (not shown), and a linkage block 364. The connection and function of the above components of the second Z-axis adjusting mechanism 36 can refer to those of the first Z-axis adjusting mechanism 26, and are not described in detail herein.

In one embodiment, the second Y-axis adjusting mechanism 34 includes a cylinder 341, and a power output end of the cylinder 341 is connected to the second Z-axis adjusting mechanism 36. When the cylinder 341 is operated, the second top frame plate 31 can be driven to translate in the Y direction relative to the second Z-axis adjusting mechanism 36, so that the second top frame plate 31 can tightly press or release the frame of the frame 600. Similarly, in order to better accommodate the Z-direction displacement adjustment during the Y-direction displacement adjustment, the top plate of the second housing 38 has a third sliding slot 382 for the screw of the second Z-axis adjusting mechanism 36 to pass through and move, and the third sliding slot 382 extends along the Y-direction.

In an embodiment, a position pointer 311 may be mounted on the second top frame plate 31, the position pointer 311 points to a side surface of the second casing 38, a fine adjustment scale is disposed at a position of the second casing 38 corresponding to the position pointer 311, and a fine adjustment displacement of the second top frame plate 31 is indicated through cooperation of the fine adjustment scale and the position pointer 311. In another embodiment, the positions of the position pointer 311 and the fine adjustment scale can be interchanged, that is, the position pointer is arranged on the second housing 38, and the scale is arranged on the second screen frame top plate 31. By adopting the design, the displacement of the screen frame 600 can be intuitively indicated, and the operation action of an operator can be guided.

As will be understood from the above description, the position adjustment mechanism provided by the present application may have the following advantageous effects as a whole: firstly, the position adjusting mechanism is driven by a motor, so that the position adjusting mode can realize automatic adjustment, and the adjusting speed and the adjusting precision can be obviously improved; meanwhile, the motor is additionally provided with the adjusting hand wheel, so that the motor can still be manually adjusted when the motor fails, and the adjusting mode is more flexible; secondly, by adopting a zero reset inductive switch, the reset operation can be executed before each adjustment; and thirdly, when the two sides of the guide rod fixing part are respectively provided with the plane bearings and the screw cap is screwed at the tail end of the screw rod, the axial movement of the screw rod and the guide rod fixing part can be effectively eliminated.

It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A position adjustment mechanism (42), comprising:

a drive motor (421);

the screw (422), the said driving motor (421) is used for driving the said screw (422) to rotate;

an internally threaded member (423), the screw (422) being in threaded engagement with the internally threaded member (423) and driving the internally threaded member (423) in translation when rotated;

wherein, driving motor (421) is keeping away from the one end of screw rod (422) is equipped with adjusting hand wheel (429), adjusting hand wheel (429) with screw rod (422) are connected for through manual rotation adjusting hand wheel (429) and drive screw rod (422) are rotatory.

2. Position adjustment mechanism (42) according to claim 1,

the position adjusting mechanism (42) further comprises a guide rod (424) and a guide rod fixing part (425), the guide rod (424) penetrates through the internal thread part (423) and is in sliding fit with the internal thread part (423), and the guide rod (424) is fixed on the guide rod fixing part (425); the screw rod (422) penetrates through the guide rod fixing piece (425) and is provided with threads at the end of the screw rod (422) far away from the driving motor (421), a nut (426) and a first plane bearing (427) are installed on the end of the screw rod (422), and the nut (426) presses the first plane bearing (427) on the guide rod fixing piece (425).

3. Position adjustment mechanism (42) according to claim 2,

the guide rod fixing piece (425) is provided with a second plane bearing (428) sleeved on the screw rod (422) on one side close to the driving motor (421), and the second plane bearing (428) is pressed on the guide rod fixing piece (425).

4. Position adjustment mechanism (42) according to claim 2,

the number of the guide rods (424) is two, the guide rod fixing piece (425) comprises two fixing plates which are oppositely arranged, the internal thread piece (423) is located between the fixing plates, and the two guide rods (424) are located on two sides of the screw rod (422).

5. Position adjustment mechanism (42) according to claim 1,

the position adjusting mechanism (42) further comprises an inductive switch (430), wherein the inductive switch (430) is fixedly installed relative to the driving motor (421) and is used for generating a control signal when being touched by a component driven by the internal thread piece (423).

6. Position adjustment mechanism (42) according to claim 5,

the inductive switch (430) is a zero reset inductive switch.

7. Position adjustment mechanism (42) according to claim 5,

the position adjusting mechanism (42) further comprises a motor cover plate (433), the inductive switch (430) is installed on the motor cover plate (433), the driving motor (421) is fixedly installed on one side of the motor cover plate (433), and the inductive switch (430) is provided with a button extending beyond the motor cover plate (433) along a direction away from the driving motor (421).

8. Position adjustment mechanism (42) according to claim 1,

the driving motor (421) is a stepping motor.

9. Position adjustment mechanism (42) according to any one of claims 1-8,

the position adjustment mechanism (42) further includes a motor housing (432), and the drive motor (421) is provided in the motor housing (432).

10. Position adjustment mechanism (42) according to claim 9,

the adjusting hand wheel (429) is positioned outside the motor shell (432).

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