CN116039229A - A linear traction device for a printing head of a screen printing machine - Google Patents

Abstract

The invention discloses a linear traction device of a printing machine head of a screen printer, which comprises a screw-nut component and a linear guide rail component which are respectively arranged at two sides of a bracket of the printing machine head, and also comprises a base plate and two clamping pieces; the base plate is fixedly connected to the sliding block; the nut and the nut support are clamped between the first clamping piece and the second clamping piece; the clamping blocks on the outer side of the nut support are correspondingly nested in the clamping grooves of the first clamping pieces, and a first buffer cushion for providing a buffer effect in the vertical direction is arranged between the clamping blocks and the clamping grooves; a second buffer cushion for providing a buffering function in the left-right direction is arranged between the clamping surface of the second clamping piece and the outer end surface of the nut; the second clamping member is capable of adjusting a mounting position on the substrate in a left-right direction. The nut support and the sliding block realize the elastic buffer clamping of multiple dimensions up and down, left and right through a specific clamping connection structure, so that the occurrence of screw rod deformation is effectively avoided, the machining precision requirement and the assembly difficulty of the printer head support are greatly reduced, and the accuracy, reliability and smoothness of linear motion are ensured.

Description

A linear traction device for a printing head of a screen printing machine

technical field

The invention relates to a linear traction device of a printing machine head of a screen printing machine.

Background technique

The bottom of the printing head of the screen printing machine is the screen, and the bottom of the screen is the substrate. During printing, the printing head drives the scraper to move evenly on the screen from the inside to the outside. During the movement, the slurry is squeezed from the mesh of the screen to the substrate by the scraper to complete the printing. In order to accurately pull the printing head to complete the above linear movement, the existing equipment is equipped with linear traction devices on both sides of the support of the printing head, and the linear traction devices on each side include a screw nut assembly and a guide rail slider assembly. , the screw nut assembly driven by the motor is composed of a screw rod, a nut, and a nut support. The screw nut assembly on both sides constitutes a double screw drive mechanism to provide linear motion traction for the printing head; the linear motion guide part of the printing head A screw nut assembly composed of a guide rail and a slide block is adopted; the nut support is fixedly connected and assembled with the slide block.

However, the disadvantage of the existing technology is that due to the influence of machining accuracy and assembly error, it is difficult for the double screw driving mechanism to achieve absolute synchronization of the movement of the double screw, and the screw assembly can only be reasonably selected according to the driving force of the screw and the rigidity of the system. tolerance. The fixed connection between the nut support and the slider in the prior art has high requirements on the processing accuracy of the printing head bracket and the assembly accuracy of the equipment, otherwise the guide rail slider will act on the screw due to the asynchronous movement of the double screw. The nut deforms the screw rod, which affects the work of the screw nut and causes abnormal noise and wear.

Contents of the invention

In order to solve the above disadvantages, the technical problem to be solved by the present invention is to provide a linear traction device for the printing head of the screen printing machine, which can effectively reduce the processing accuracy requirements for the printing head support and the assembly accuracy requirements of the equipment. In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is a linear traction device of a printing head of a screen printing machine, which includes a screw nut assembly and a linear guide rail assembly respectively installed on both sides of the support of the printing head, The screw nut assembly driven by the motor is composed of a screw rod, a nut, and a nut support, and the linear guide rail assembly is composed of a guide rail and a slider; the screw rod and the guide rail are arranged in parallel, and it is characterized in that it also includes a base plate and a first clamping member , the second clamping piece;

The base plate is located between the screw nut assembly and the linear guide rail assembly, and the base plate is fixed on the slider;

The nut and the nut support are clamped between the first clamping part and the second clamping part; the brackets on both sides of the printing head are respectively fixedly connected to a nut support;

The first clamping part is fixed on the base plate close to the outside of the nut support, the first clamping part is provided with a card slot, and the outside of the nut support is provided with a block, and the block is correspondingly nested in the card slot , the upper and lower side walls of the card slot are respectively provided with a first buffer pad of elastic material to provide a buffering effect in the up and down direction, and the upper and lower ends of the card block are correspondingly nested between the two first buffer pads of the card slot;

The second clamping part is fixed on the base plate close to the outer side of the nut, and a second buffer pad of elastic material is provided between the clamping surface of the second clamping part and the outer end surface of the nut to provide a buffering effect in the left and right directions; The second clamping part is provided with a position adjusting part, and the position adjusting part can adjust the installation position of the second clamping part on the substrate along the left and right directions.

The beneficial effect of the present invention is that, by adopting the above technical solution, the nut support is elastically clamped and fixed by two clamping parts so as to be connected with the slider, and the multi-dimensional elastic buffer clamping of up, down, left, and right is realized through a specific clamping structure. It can effectively digest the adverse effects caused by the asynchronous movement of the double screw in all directions, greatly reduce the force of the guide rail slider on the screw nut, effectively avoid the deformation of the screw, and thus greatly reduce the processing accuracy requirements for the printing head bracket , greatly reducing the difficulty of assembling the linear traction device driven by double screw rods, and at the same time ensuring the precise, reliable and smooth linear movement of the printing head.

Preferably, the second clamping piece wraps the corner portion of the substrate, and the second clamping piece is respectively fixed on two adjacent sides of the corner portion of the substrate by a first screw in the left-right direction and a second screw in the front-back direction. On the wall, the second screw rod is fixed on the base plate through the waist-shaped groove on the second clamping member. The fixing is reliable and firm, and the installation position of the second clamping member on the base plate can be conveniently adjusted along the left and right directions. Further, the second clamping member is fixed on the base plate through two sets of waist-shaped grooves and a second screw rod. Improves stability of adjustable mounts.

Of course, any product implementing the present invention does not necessarily need to achieve all the above-mentioned advantages at the same time.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment of the present invention. In an embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. When an element is referred to as being "fixed on" 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.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the screen printing machine of embodiment;

Figure 2 is a schematic diagram of the overall structure of the combined connection of the screw nut assembly and the linear guide assembly;

Fig. 3 is a schematic diagram of the overall structure of the combined connection of the screw nut assembly and the base plate, the first clamping part and the second clamping part.

Detailed ways

Referring to accompanying drawing 1-3, reflect a kind of specific structure of the present invention. In the screen printing machine, the screen is below the printing head 4, and the substrate is below the screen. During printing, the scraper of the printing head 4 moves evenly on the screen from the inside to the outside. During the movement, the slurry is squeezed from the mesh of the screen to the substrate by the scraper to complete the printing. In order to realize the above-mentioned movement of the printing head 4, the linear traction device of the printing head of the screen printing machine according to the present invention is adopted, specifically:

The device includes a screw nut assembly and a linear guide rail assembly respectively installed on both sides of the support 5 of the printing head 4, and the motor-driven screw nut assembly is composed of a screw rod 201, a nut 202, and a nut support 203. The brackets 5 on both sides of the machine head 4 are respectively fixedly connected with a nut support 203 . The linear guide rail assembly is composed of a guide rail 101 and a slider 102; the axes of the screw rod 201 and the guide rail 101 are arranged in parallel.

The device also includes a substrate 301, a first clamping part 305, and a second clamping part 307;

The base plate 301 is located between the upper screw nut assembly and the lower linear guide assembly. In the example, the base plate 301 is fixed on two sliders 102 to improve the stability and balance of the structure and ensure smooth sliding.

The nut 202 and the nut holder 203 are clamped between the first clamping piece 307 and the second clamping piece 305 which are oppositely arranged.

The first clamping part 307 is fixed on the outer side of the base plate 301 close to the nut support 203 through the bolt 302, the first clamping part 307 is provided with a slot 308, and the outside of the nut support 203 is provided with a block 204, the clamping block 204 is correspondingly nested in the clamping groove 308, and the first buffer pad 303 of rubber material is provided between the clamping block 204 and the clamping groove 308, and the upper and lower cushions are provided between the clamping block 204 and the clamping groove 308 by utilizing the elasticity of the rubber. directional buffer. In an example, first buffer pads 303 are respectively provided on the upper and lower side walls of the card slot 307 , and the upper and lower ends of the card block 204 are correspondingly nested between the two first buffer pads 303 of the card slot 308 . Therefore, the buffering effect in the up and down direction can be realized conveniently and reliably.

The second clamping part 305 is fixed on the base plate 301 near the outer side of the nut 202, and a second buffer pad 304 made of rubber is provided between the clamping surface of the second clamping part 305 and the outer end surface of the nut 202. , the second buffer pad 304 utilizes the elasticity of rubber to provide a buffering effect in the left and right direction between the clamping surface of the second clamping member 305 and the outer end surface of the nut 202 .

The second clamping part 305 is provided with a position adjusting part, so that the second clamping part 305 can adjust the installation position of the second clamping part 305 on the substrate 301 along the left and right direction.

In the above structure, the connection between the first clamping part 307 and the second clamping part 305 and the base plate 301, and the clamping and fixing of the nut 202 and the nut support 203 are all firm and reliable, thereby ensuring that the nut support 203 and the slider 102 reliable connection.

In an example, the second clamping member 305 wraps the corner portion of the substrate 301, and the second clamping member 305 is provided with a screw hole 309 and two waist-shaped holes 306, and the left and right directions (that is, parallel to the axis of the screw rod) The first screw rod in the direction) passes through the screw hole 309 to fix the second clamping member 305 on a side wall of the corner of the base plate 301; The hole 306 fixes the second clamping member 305 on the other side wall of the corner of the base plate 301 . In the example, the second screw rod and the waist groove 306 are the position adjusting parts. The fixing is reliable and firm, and the installation position of the second clamping member on the base plate can be adjusted conveniently along the left and right directions, and the stability of the adjustable installation can be improved.

With the above technical solution, the nut 202 and the nut support 203 are no longer rigidly fixedly connected with the base plate 301 and its slider 102 . Instead, two clamping parts are elastically clamped and fixed, so as to realize the connection. The multi-dimensional elastic buffer clamping of up, down, left, and right can effectively absorb the adverse effects of the asynchronous movement of the double screw rods, greatly reduce the force of the guide rail slider assembly on the screw nut assembly, and effectively avoid the deformation of the screw rod 201 . Therefore, the present invention can greatly reduce the processing accuracy requirements for the printing head support on the basis of ensuring the accurate, reliable and smooth linear movement of the printing head, and greatly reduce the difficulty of assembling the linear traction device driven by double screw rods.

The embodiments of the present invention disclosed above are only to help illustrate the present invention. The examples do not exhaust all details nor limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in conjunction with the accompanying drawings in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is only limited by the claims and their full scope and equivalents. not limited by the specific embodiments disclosed.

Claims (3)

1. The linear traction device of the printing machine head of the screen printer comprises a screw-nut assembly and a linear guide rail assembly which are respectively arranged at two sides of a bracket of the printing machine head, wherein the screw-nut assembly driven by a motor consists of a screw rod, a nut and a nut support, and the linear guide rail assembly consists of a guide rail and a sliding block; the screw rod and the guide rail are arranged in parallel, and the device is characterized by further comprising a base plate, a first clamping piece and a second clamping piece;

the base plate is positioned between the screw rod nut assembly and the linear guide rail assembly and fixedly connected to the sliding block;

the nut and the nut support are clamped between the first clamping piece and the second clamping piece; the supports on two sides of the printer head are respectively fixedly connected with a nut support;

the first clamping piece is fixedly arranged on the substrate and is close to the outer side of the nut support, the first clamping piece is provided with a clamping groove, a clamping block is arranged on the outer side of the nut support and is correspondingly nested in the clamping groove, the upper side wall and the lower side wall of the clamping groove are respectively provided with a first buffer cushion pad made of elastic materials for providing a buffer effect in the vertical direction, and the upper end and the lower end of the clamping block are correspondingly nested between the two first buffer cushions of the clamping groove;

the second clamping piece is fixedly arranged on the base plate and is close to the outer side of the nut, and a second buffer pad made of elastic materials is arranged between the clamping surface of the second clamping piece and the outer end surface of the nut to provide a buffering effect in the left-right direction; the second clamping piece is provided with a position adjusting piece, and the position adjusting piece can adjust the mounting position of the second clamping piece on the substrate along the left-right direction.

2. The linear traction device of the printer head of the screen printer according to claim 1, wherein the second clamping piece wraps the corner portion of the substrate, the second clamping piece is fixed on two adjacent side walls of the corner portion of the substrate through a first screw rod in the left-right direction and a second screw rod in the front-back direction, and the second screw rod is fixed on the substrate through a waist-shaped groove on the second clamping piece.

3. The linear pulling device of a printer head of a screen printer according to claim 1, wherein the second clamping member is fixed to the base plate by two sets of waist-shaped grooves and a second screw.

Images