Scissor mechanism for SMT material receiving machine

Abstract

The utility model discloses a scissor mechanism for an SMT (Surface Mount Technology) material receiving machine, which relates to the field of material receiving machines and comprises a mounting frame, a scissor body and a scissor driving assembly, the scissor driving assembly comprises a first sliding rail, a first sliding block, a second sliding rail, a second sliding block and a pushing assembly. The extending directions of the first sliding rail and the second sliding rail are horizontal; the pushing assembly can synchronously push the first sliding block and the second sliding block to move. The mounting frame is fixed on the first sliding block; a movable blade of the scissors is rotatably fixed on the second sliding block; the pushing assembly can continuously push the second sliding block to the end point of the second sliding rail after pushing the first sliding block to the end point of the first sliding rail; in the process, the second sliding block can be driven to push the scissor movable blade to rotate relative to the scissor fixed blade. According to the scissors mechanism for the SMT material receiving machine, the problems that scissors of a material receiving machine in the prior art are tedious to drive and a material belt is prone to being affected are solved, the structure for driving the scissors to move and shear can be optimized, and the influence of the scissors on movement of the material belt is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of material receiving machine, especially a scissors mechanism for SMT material receiving machine. BACKGROUND

[0002] SMT is surface mount technology, which is used to mount electronic components without pins or short leads on PCB, and is the most popular technology and process in electronic assembly industry.

[0003] The material tape used in SMT is used in a roll shape. When a roll of material tape is about to be used up, the old material tape needs to be connected with a new material tape (using adhesive tape) in time. In this process, the old material tape is wound onto the material receiving machine, the head of the old material tape is continuously output to the work equipment, and the tail of the old material tape is guided to the material receiving machine and connected with the head of the new material tape in the material receiving machine, so as to ensure that the work equipment does not stop running and the production efficiency is ensured.

[0004] Since there is usually some waste material tape that cannot be used at the tail of the old material tape and the head of the new material tape, the waste material tape needs to be cut off when connecting the old material tape with the new material tape. This step is completed by scissors.

[0005] Since the old material tape and the new material tape need to be transported horizontally, in order to avoid interference of the scissors with the horizontal movement of the material tape, the scissors need to be away from the material tape when the material tape is being transported. Therefore, in order to automatically realize the shearing function of the scissors on the material tape, two steps are needed, i.e. moving the scissors horizontally and opening and closing the scissors to realize shearing work. These two steps are usually realized by using two independent driving devices.

[0006] In the prior art, a kind of SMT material receiving machine scissors disclosed in Chinese patent application No. 202022930833.1 provides a kind of scissors for cutting off part of the head of material tape. The two steps of horizontal movement and shearing work of the scissors are realized by one motor (i.e. lower cutter driving structure 4), so as to optimize the shearing process of the material tape and avoid multiple devices driving the scissors to shear and move the scissors. However, the horizontal movement of the scissors is realized by eccentric rotating shaft 51, so the horizontal movement distance of the scissors is limited by the shape of the eccentric rotating shaft. After the horizontal movement of the scissors, the scissors may still be very close to the material tape, which may interfere with the movement of the material tape and scratch the material tape with the blade of the scissors, causing damage to the material tape. UTILITY MODEL CONTENTS

[0007] In view of the above technical problems, the scissors mechanism for SMT material receiving machine provided by the utility model can optimize the structure for driving the scissors to move and shear, and reduce the influence of the scissors on the movement of the material tape.

[0008] To achieve the above object, the technical scheme adopted by the utility model is

[0009] The utility model provides a scissors mechanism for SMT material receiving machine, including mounting bracket, scissors body and scissors drive component, the scissors body includes scissors fixed blade and scissors movable blade, the scissors fixed blade is fixed on the mounting bracket, the cutting edge of scissors fixed blade is downward, the scissors movable blade can rotate and be fixed on the mounting bracket, the cutting edge of scissors movable blade is opposite to the cutting edge of scissors fixed blade, the scissors drive component includes first sliding rail, first sliding block, second sliding rail, second sliding block and push assembly, the extension direction of first sliding rail second sliding rail is horizontal, the first sliding block can be slidably fixed on the first sliding rail, the second sliding block can be slidably fixed on the second sliding rail, the push assembly can push first sliding block along first sliding rail, the push assembly can push second sliding block along second sliding rail, the push assembly can synchronously push first sliding block and second sliding block, the mounting bracket is fixed on the first sliding block, the scissors movable blade is rotatably fixed on the second sliding block, after the push assembly pushes first sliding block to the first sliding rail terminal point, can continue to push second sliding block to the second sliding rail terminal point, in the process that the push assembly pushes second sliding block to the second sliding rail terminal point, can drive second sliding block to push scissors movable blade to rotate compared with scissors fixed blade.

[0010] The utility model provides a scissors mechanism for SMT material receiving machine, preferably, the scissors body still includes tension spring, the tension spring is connected with the scissors fixed blade and the scissors movable blade, under the natural elongation state of tension spring, can provide the tension of opening compared with the scissors fixed blade to the scissors movable blade.

[0011] The utility model provides a scissors mechanism for SMT material receiving machine, preferably, the push assembly includes motor, screw rod and screw rod nut mounting plate, the motor is connected with the screw rod transmission, the motor can drive the rotation of screw rod, the screw rod nut mounting plate is fixed on the second sliding block.

[0012] The utility model provides a scissors mechanism for SMT material receiving machine, preferably, the push assembly still includes driving wheel, driven wheel and belt, the driving wheel is coaxially fixed on the motor, the driven wheel is coaxially fixed on the screw rod, the driving wheel is connected with the driven wheel through the transmission of belt.

[0013] The above technical scheme has the following advantages or beneficial effects:

[0014] The utility model discloses a scissors mechanism for SMT material receiving machine relates to material receiving machine field, including mounting bracket, scissors body and scissors drive assembly, the scissors body includes scissors fixed blade and scissors movable blade, the scissors fixed blade is fixed on the mounting bracket, the blade of scissors fixed blade is downward, the scissors movable blade rotatable fixed on the mounting bracket, the blade of scissors movable blade is opposite with the blade of scissors fixed blade, the scissors drive assembly includes first sliding rail, first sliding block, second sliding rail, second sliding block and push assembly, the extension direction of first sliding rail second sliding rail is horizontal, first sliding block can be slidably fixed on first sliding rail, second sliding block can be slidably fixed on second sliding rail, push assembly can push first sliding block along first sliding rail slide, push assembly can push second sliding block along second sliding rail slide, push assembly can synchronize push first sliding block, second sliding block moves, the mounting bracket is fixed on first sliding block, the scissors movable blade rotatable fixed on second sliding block, after push assembly pushes first sliding block to first sliding rail end point, can continue pushing second sliding block to second sliding rail end point, in the process that push assembly pushes second sliding block to second sliding rail end point, can drive second sliding block push the scissors movable blade compared with the rotation of scissors fixed blade, the utility model provides a scissors mechanism for SMT material receiving machine, solves the problem that the prior art material receiving machine scissors drive is complicated and is easy to influence material belt, can optimize the structure of driving scissors to move and cut, reduces the influence that the scissors produces to material belt movement. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model and its features, shape and advantages will become more obvious by reading the detailed description of the non - limited embodiment of the following drawings. Same mark indicates same part in all drawings. The drawing is not drawn according to proportion, and the emphasis is on showing the main idea of the utility model.

[0016] Fig. 1 It is the whole structure schematic diagram of scissors mechanism for SMT material receiving machine provided by the utility model embodiment 1.

[0017] Fig. 2 It is the structure schematic diagram of first sliding block of scissors mechanism for SMT material receiving machine provided by the utility model embodiment 1 when moving to first sliding rail end point.

[0018] Fig. 3 It is the structure schematic diagram of scissors mechanism for SMT material receiving machine provided by the utility model embodiment 1 after scissors closing.

[0019] Fig. 4 It is the structure schematic diagram of push assembly of scissors mechanism for SMT material receiving machine provided by the utility model embodiment 1. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. It should also be noted that the terminology used in this utility model is for describing specific implementations only and is not intended to limit the exemplary implementations according to this application.

[0021] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without inventive effort are within the protection scope of the present utility model.

[0022] Example 1:

[0023] The scissor mechanism for an SMT receiving machine provided in Embodiment 1 of this utility model, such as... Figs. 1 to 4 As shown, the scissors include a mounting bracket 1, a scissor body 2, and a scissor drive assembly 3. The scissor body 2 includes a fixed blade 21 and a movable blade 22. The fixed blade 21 is fixed to the mounting bracket 1 with its blade facing downwards. The movable blade 22 is rotatably fixed to the mounting bracket 1 and is positioned opposite to the blade of the fixed blade 21. The scissor drive assembly 3 includes a first slide rail 31, a first slider 32, a second slide rail 33, a second slider 34, and a push assembly 35. The first slide rail 31 and the second slide rail 33 extend horizontally. The first slider 32 is slidably fixed to the first slide rail 31, and the second slider 34 is slidably fixed to the second slide rail 33. The push assembly 35 can push the first slider 32 to slide along the first slide rail 31; the push assembly 35 can push the second slider 34 to slide along the second slide rail 33; the push assembly 35 can simultaneously push the first slider 32 and the second slider 34 to move; the mounting bracket 1 is fixed on the first slider 32; the movable blade 22 of the scissors is rotatably fixed on the second slider 34; after the push assembly 35 pushes the first slider 32 to the end of the first slide rail 31, it can continue to push the second slider 34 to the end of the second slide rail 33; during the process of the push assembly 35 pushing the second slider 34 to the end of the second slide rail 33, it can drive the second slider 34 to push the movable blade 22 of the scissors to rotate relative to the fixed blade 21 of the scissors.

[0024] The scissors mechanism for the SMT material receiving machine provided in Embodiment 1 of the utility model is used, and the first sliding block 32 is moved on the first sliding rail 31, the whole scissors is driven to move horizontally (the first sliding rail 31 is horizontally extended and arranged), the second sliding block 34 is moved on the second sliding rail 33, the movable blade 22 of the scissors is driven to rotate relative to the fixed blade 21 of the scissors, and the first sliding block 32 and the second sliding block 34 are both driven by the same pushing assembly 35 (the pushing assembly 35 is a structure that can push an object in a straight line direction, such as a gas cylinder or an electric cylinder, which belongs to the prior art), so that a driving structure realizes two different drives (the two different drives are to control the horizontal movement of the scissors and to control the opening and closing of the scissors); compared with the driving structure of the prior art (a cam is used, and the difference between the maximum radius and the minimum radius of the cam is limited, when it is necessary to increase the horizontal movement distance of the scissors, the maximum radius of the cam cannot be simply increased to be realized, and the size of the cam needs to be increased), the horizontal movement distance of the scissors in the embodiment is limited by the movement distance of the first sliding block 32 on the first sliding rail 31, and the horizontal movement distance of the scissors can be controlled by adjusting the movement distance of the first sliding block 32 (because the fixed blade 21 of the scissors and the movable blade 22 of the scissors are both fixed on the mounting frame 1, and the mounting frame is fixed on the first sliding block 32); the purpose of the embodiment to realize the control of the movement distance of the scissors is to adapt to an SMT material receiving machine device with different widths of adhesive (the device has two parallel strip-shaped supporting plates, one of which can move horizontally, so that the interval between the two supporting plates can be controlled, so that the material belt with different widths is supported on both sides of the bottom of the material belt, and for the material belt with different widths, the scissors need to move in the horizontal direction by different distances), and the structure of the embodiment is easier to adjust than the scissors structure proposed in the background art (that is, the end position of the first sliding rail 31 is realized).

[0025] The scissors mechanism for the SMT material receiving machine provided in Embodiment 1 of the utility model solves the problem that the scissors driving of the material receiving machine of the prior art is complicated and easy to affect the material belt, can optimize the structure of driving the scissors to move and shear, and reduces the influence of the scissors on the movement of the material belt.

[0026] As a preferred solution, in the embodiment, the scissors body 2 further comprises a tension spring 23; the tension spring 23 is connected to the scissors fixed blade 21 and the scissors movable blade 22; the tension spring 23 can provide a pulling force to the scissors movable blade 22 compared to the scissors fixed blade 21 in a natural elongation state. The scissors movable blade 22 rotates compared to the scissors fixed blade 21 from the open state to the closed state, and can cut the material strip at the blade of the scissors movable blade 22 and the scissors fixed blade 21; the tension spring 23 can provide a pulling force to the scissors movable blade 22 to open the scissors movable blade 22 compared to the scissors fixed blade 21 (the scissors movable blade 22 is opened compared to the scissors fixed blade 21, that is, the blade of the scissors movable blade 22 is in a trend of increasing angle compared to the scissors fixed blade 21); since the pushing assembly 35 needs to synchronously push the first sliding block 32 and the second sliding block 34, in the embodiment, by increasing the force required by the pushing assembly 35 to push the second sliding block 34 to move relatively compared to the first sliding block 32, the synchronous movement of the first sliding block 32 and the second sliding block 34 is blocked when the first sliding block 32 reaches the end of the first sliding rail 31, and then the pushing assembly 35 continues to push the second sliding block 34 to move (because the second sliding block 34 and the scissors movable blade 22 are rotatably fixed, the first sliding block 32 and the mounting frame 1 are fixed, and the scissors movable blade 2 is rotatably fixed on the mounting frame, when the pushing assembly 35 synchronously pushes the first sliding block 32 and the second sliding block 34, because there is a pulling force of the tension spring 23 between the first sliding block 32 position fixedly and the scissors fixed blade 21 and the second sliding block 34 rotatably fixed scissors movable blade 22, therefore, when the second sliding block 34 is moved alone, the second sliding block 34 exerts a pushing force on the scissors movable blade 2, the scissors movable blade 2 exerts a pushing force on the scissors fixed blade 21 through the tension spring 23, and the scissors fixed blade 21 exerts a pushing force on the first sliding block 32 through the mounting frame 1, thereby realizing the synchronous movement of the first sliding block 32 and the second sliding block 34; when the first sliding block 32 reaches the end of the first sliding rail 31, the position of the mounting frame 1 is fixed, at this time, the second sliding block 34 continues to move, and the second sliding block 34 pushes the scissors movable blade 22 to rotate compared to the scissors fixed blade 21, and in this process, the pulling force of the tension spring 23 needs to be overcome).

[0027] As a preferred scheme, in the embodiment, the pushing assembly 35 comprises a motor 351, a screw rod 352 and a screw rod nut mounting plate 353; the motor 351 is in transmission connection with the screw rod 352; the motor 351 can drive the screw rod 352 to rotate; the screw rod nut mounting plate 353 is fixedly connected with the screw rod 352; and the screw rod nut mounting plate 353 is fixed on the second sliding block 34. In order to specifically realize the pushing of the second sliding block 34 by the pushing assembly 35, in the embodiment, the motor 351 is driven to rotate the screw rod 352, so as to drive the screw rod nut mounting plate 353 to move along the extension direction of the screw rod 352, and thus the second sliding block 34 is pushed by the screw rod nut mounting plate 353.

[0028] As a preferred scheme, in the embodiment, the pushing assembly 35 further comprises a driving wheel 354, a driven wheel 355 and a belt 356; the driving wheel 354 is coaxially fixed on the motor 351; the driven wheel 355 is coaxially fixed on the screw rod 352; and the driving wheel 354 is in transmission connection with the driven wheel 355 through the belt 356. In the embodiment, the belt 356 is preferably used for the belt transmission of the motor 351 and the screw rod 352.

[0029] In summary, the utility model discloses a scissors mechanism for SMT material receiving machine relates to material receiving machine field, including mounting bracket, scissors body and scissors drive assembly, the scissors body includes scissors fixed blade and scissors movable blade, the scissors fixed blade is fixed on the mounting bracket, the blade of scissors fixed blade is downward, the scissors movable blade rotatable fixed on the mounting bracket, the blade of scissors movable blade with the blade of scissors fixed blade opposite setting, the scissors drive assembly includes first sliding rail, first sliding block, second sliding rail, second sliding block and pushing assembly, the extension direction of first sliding rail The second sliding rail is horizontal, the first sliding block can be slidably fixed on the first sliding rail, the second sliding block can be slidably fixed on the second sliding rail, the pushing assembly can push the first sliding block along the first sliding rail and slide, the pushing assembly can push the second sliding block along the second sliding rail and slide, the pushing assembly can synchronize and push the first sliding block, the second sliding block moves, the mounting bracket is fixed on the first sliding block, the scissors movable blade rotatable fixed on the second sliding block, after the pushing assembly pushes the first sliding block to the first sliding rail terminal point, can continue to push the second sliding block to the second sliding rail terminal point, in the process that the pushing assembly pushes the second sliding block to the second sliding rail terminal point, can drive the second sliding block and push the scissors movable blade and rotate compared with the scissors fixed blade. The scissors mechanism for SMT material receiving machine provided by the utility model solves the problem that the scissors drive of prior art material receiving machine is complicated and is easy to affect the material belt, can optimize the structure of driving scissors to move and cut, and reduce the influence of the scissors on the movement of the material belt.

[0030] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct or indirect application in other related technical fields based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A scissor mechanism for an SMT material receiving machine, characterized in that, The scissor body comprises a scissor fixed blade and a scissor movable blade; The scissor fixed blade is fixed on the mounting frame; the blade of the scissor fixed blade faces downward; The scissor movable blade is rotatably fixed on the mounting frame; the scissor movable blade is oppositely arranged with the blade of the scissor fixed blade; The scissor driving assembly comprises a first sliding rail, a first sliding block, a second sliding rail, a second sliding block and a pushing assembly; The first sliding rail and the second sliding rail are horizontally extended; The first sliding block is slidably fixed on the first sliding rail; The second sliding block is slidably fixed on the second sliding rail; The pushing assembly can push the first sliding block to slide along the first sliding rail; The pushing assembly can push the second sliding block to slide along the second sliding rail; The pushing assembly can synchronously push the first sliding block and the second sliding block to move; The mounting frame is fixed on the first sliding block; The scissor movable blade is rotatably fixed on the second sliding block; After the pushing assembly pushes the first sliding block to the end of the first sliding rail, it can continue to push the second sliding block to the end of the second sliding rail; During the process that the pushing assembly pushes the second sliding block to the end of the second sliding rail, the second sliding block can push the scissor movable blade to rotate relative to the scissor fixed blade. The scissor body further comprises a tension spring; 2. Shear mechanism for an SMT material receiver according to claim 1, characterized in that The tension spring connects the scissor fixed blade and the scissor movable blade; In the natural elongation state of the tension spring, it can provide a pulling force to the scissor movable blade to open relative to the scissor fixed blade. The pushing assembly comprises a motor, a lead screw and a lead screw nut mounting plate; 3. Shear mechanism for an SMT material receiver according to claim 2, characterized in that The motor is in transmission connection with the lead screw; the motor can drive the lead screw to rotate; The lead screw nut mounting plate is fixed on the second sliding block. The pushing assembly further comprises a driving wheel, a driven wheel and a belt; The driving wheel is coaxially fixed on the motor; 4. Shear mechanism for an SMT material receiver according to claim 3, characterized in that The driven wheel is coaxially fixed on the lead screw; The driving wheel and the driven wheel are in transmission connection through the belt. ​ ​

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