Scraper mechanism and solder paste printer

Abstract

The present invention provides a scraper mechanism and a solder paste printer, the scraper mechanism includes a pressure block, a scraper lifting mounting seat, a first drive device, a second drive device, a spring guide column, a first pressure plate, a second pressure plate, a pressure sensing device, a first transmission device, a second transmission device, a front scraper holder, and a rear scraper holder. The first drive device and the second drive device are respectively installed above the scraper lifting mounting seat, the second pressure plate is installed above the first drive device and the second drive device, the second pressure plate is installed on the pressure sensing device, the first pressure plate is installed between the pressure sensing device and the pressure block, and the pressure sensing device is respectively connected to the pressure block and the first pressure plate; the first transmission device and the second transmission device are respectively installed below the scraper lifting mounting seat. The beneficial effect of the present invention is that the scraper mechanism of the present invention uses a spring plus a pressure plate to ensure the smooth transportation of the scraper.

Description

Technical Field

[0001] The invention relates to the field of solder paste printers, and in particular to a scraper mechanism and a solder paste printer. Background Art

[0002] The scraper is an important mechanism in the solder paste printer that is responsible for pressing the solder paste onto the circuit board. The mechanism responsible for conveying the scraper has high requirements. If there is any deviation, it may lead to a decline in the printing quality of the printer. The scraper is divided into front and rear scrapers with different movement modes, so there are two motors for conveying the scraper. Generally, one scraper is conveyed first, and then it is conveyed back after the scraper is finished working. Then another scraper is conveyed, and the process is repeated. When the scraper is working, it will touch the printed steel mesh. If there is no buffer mechanism, it will not only reduce the printing quality, but also may damage the steel mesh, causing serious losses.

[0003] The existing transport mechanism often causes the scraper to shake when transporting the scraper. The scraper shaking has a great impact on the printing press with high requirements for printing accuracy. It not only affects the printing quality, but also seriously damages the scraper steel mesh. The new practical use of springs and pressure plates ensures the smooth transportation of the scraper.

[0004] The existing pressure sensor of the scraper conveying mechanism is generally installed under the scraper beam, and two pressure sensors need to be installed, which is costly. Summary of the invention

[0005] The present invention provides a scraper mechanism, comprising a pressure block, a scraper lifting mounting seat, a first driving device, a second driving device, a bullet guide column, a first pressure plate, a second pressure plate, a pressure sensing device, a first transmission device, a second transmission device, a front scraper holder, and a rear scraper holder, wherein the first driving device and the second driving device are respectively mounted above the scraper lifting mounting seat, the second pressure plate is mounted above the first driving device and the second driving device, the pressure sensing device is mounted on the second pressure plate, the first pressure plate is mounted between the pressure sensing device and the pressure block, and the pressure sensing device is respectively connected to the pressure block and the first pressure plate; the first transmission device and the second transmission device are respectively mounted below the scraper lifting mounting seat, one end of the first transmission device is connected to the first driving device, and the other end of the first transmission device is connected to the front scraper holder, one end of the second transmission device is connected to the second driving device, and the other end of the second transmission device is connected to the rear scraper holder; four bullet guide columns are respectively arranged at four top corners of the scraper lifting mounting seat, and the four bullet guide columns are respectively connected to the first pressure plate.

[0006] As a further improvement of the present invention, the bullet guide column includes a mounting seat and an elastic component. The mounting seats are respectively installed at the four top corners of the scraper lifting mounting seat. The elastic component is installed in the mounting seat, and the elastic component is connected to the first pressure plate.

[0007] As a further improvement of the present invention, the elastic component includes a first compression spring and a second compression spring, the first compression spring is installed in the mounting seat, the second compression spring is installed under the first pressure plate, and the first compression spring is connected to the second compression spring; the guide column also includes a first washer and a second washer, the first washer is installed between the first compression spring and the second compression spring, and the second washer is installed between the second compression spring and the first pressure plate.

[0008] As a further improvement of the present invention, the first transmission device includes a screw rod, a screw rod nut, a first front connecting plate, a front support shaft, and a second front connecting plate. The first driving device is connected to the screw rod, the screw rod is mounted with the screw rod nut, the first front connecting plate is mounted on the screw rod nut, the first front connecting plate is mounted with the front support shaft, the front support shaft is connected to the second front connecting plate, and the front scraper holder is mounted on the second front connecting plate; the first driving device drives the screw rod to rotate, and the rotation of the screw rod simultaneously drives the screw rod nut to move, and the screw rod nut drives the first front connecting plate and the front support shaft connected to the first front connecting plate to move, and the movement of the front support shaft simultaneously drives the second connecting plate to move, and the second connecting plate drives the front scraper holder to move.

[0009] As a further improvement of the present invention, the first transmission device also includes a sliding device, which is installed on the scraper lifting mounting seat and is arranged on both sides of the screw rod; the sliding device includes a slide rail and a slider, which is installed on the slide rail and can slide along the slide rail, and the front connecting plate is respectively connected to the screw rod nut and the sliders on both sides of the screw rod nut; the first transmission device also includes a coupling, and the second driving device is a motor, and the motor shaft end is connected to the screw rod through the coupling.

[0010] As a further improvement of the present invention, the scraper mechanism also includes a connecting plate, which is installed above the scraper lifting mounting seat, the connecting plate is located on both sides of the first driving device and the second driving device, and the second pressure plate is installed above the connecting plate.

[0011] As a further improvement of the present invention, the second transmission device includes an arm plate and a rear connecting plate, the rear connecting plate is respectively connected to the second driving device and the arm plate, and the rear scraper holder is installed at the front end of the arm plate; the second driving device drives the rear connecting plate to move while driving the arm plate to move, and the arm plate drives the rear scraper holder to move; the second driving device is a motor.

[0012] As a further improvement of the present invention, the scraper mechanism also includes a lower limit sensing plate and an upper limit sensing plate, and the lower limit sensing plate and the upper limit sensing plate are used to limit the up and down movement range of the scraper; the new scraper mechanism also includes a scraper limit block, and the scraper limit block is installed on the front connecting plate, and the scraper limit block is used to prevent the scraper from shaking left and right.

[0013] As a further improvement of the present invention, the scraper mechanism also includes a spring, the pressure sensing device is a pressure sensor, one end of the spring is installed under the pressure block, the other end of the spring passes through the first pressure plate and is installed on the pressure sensor, and the pressure sensor is installed on the second pressure plate; the new scraper mechanism also includes a spring guide column.

[0014] The invention also discloses a solder paste machine, which comprises the scraper mechanism described in the invention.

[0015] The beneficial effects of the present invention are: 1. The scraper mechanism of the present invention utilizes a spring plus a pressure plate to ensure smooth scraper transportation; 2. The scraper mechanism of the present invention only needs to install one pressure sensor, which reduces the cost; 3. The scraper mechanism of the present invention can detect pressure changes in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is an exploded view of the scraper mechanism of the present invention;

[0017] Figure 2 It is a structural diagram of the scraper mechanism of the present invention. DETAILED DESCRIPTION

[0018] like Figure 1As shown, the present invention discloses a scraper mechanism, including a pressure block 1, a scraper lifting mounting seat 4, a first driving device, a second driving device, a bullet guide column, a first pressure plate 2, a second pressure plate 6, a pressure sensing device, a first transmission device, a second transmission device, a front scraper holder 10, and a rear scraper holder 21. The first driving device and the second driving device are respectively installed above the scraper lifting mounting seat 4, the second pressure plate 6 is installed above the first driving device and the second driving device, the pressure sensing device is installed on the second pressure plate 6, and the first pressure sensing device is installed between the pressure sensing device and the pressure block 1. a pressure plate 2, and the pressure sensing device is respectively connected to the pressure block 1 and the first pressure plate 2; the first transmission device and the second transmission device are respectively installed under the scraper lifting mounting seat 4, one end of the first transmission device is connected to the first drive device, and the other end of the first transmission device is connected to the front scraper holder 10, one end of the second transmission device is connected to the second drive device, and the other end of the second transmission device is connected to the rear scraper holder 21; four top corners of the scraper lifting mounting seat 4 are respectively provided with four said guide columns, and the four said guide columns are respectively connected to the first pressure plate 2.

[0019] The elastic guide column includes a mounting seat 11 and an elastic component. The mounting seats 11 are respectively installed at the four top corners of the scraper lifting mounting seat 4. The elastic component is installed in the mounting seat 11, and the elastic component is connected to the first pressure plate 2.

[0020] The elastic component includes a first compression spring and a second compression spring 18. The first compression spring is installed in the mounting seat 11, and the second compression spring 18 is installed under the first pressure plate 2. The first compression spring is connected to the second compression spring 18. The guide column also includes a first washer 14 and a second washer 15. The first washer 14 is installed between the first compression spring and the second compression spring, and the second washer 15 is installed between the second compression spring and the first pressure plate 2.

[0021] The first transmission device includes a screw rod, a screw rod nut, a first front connecting plate 13, a front support shaft 16, and a second front connecting plate 17. The first driving device is connected to the screw rod, the screw rod is equipped with the screw rod nut, the first front connecting plate 13 is equipped with the screw rod nut, the first front connecting plate 13 is equipped with the front support shaft 16, the front support shaft 16 is connected to the second front connecting plate 17, and the front scraper holder 10 is installed on the second front connecting plate 17; the first driving device drives the screw rod 12 to rotate, and the rotation of the screw rod 12 simultaneously drives the screw rod nut to move, and the screw rod nut drives the first front connecting plate 13 and the front support shaft 16 connected to the first front connecting plate 13 to move, and the movement of the front support shaft 16 simultaneously drives the second connecting plate 17 to move, and the second connecting plate 17 drives the front scraper holder 10 to move.

[0022] The first transmission device also includes a sliding device, which is installed on the scraper lifting mounting seat 4 and is arranged on both sides of the screw rod 12; the sliding device includes a slide rail and a slider, the slider is installed on the slide rail, and the slider can slide along the slide rail, and the first front connecting plate 13 is respectively connected to the screw rod nut and the sliders on both sides of the screw rod nut; the first transmission device also includes a coupling, and the first driving device is a motor 9, and the shaft end of the motor 9 is connected to the screw rod 12 through the coupling.

[0023] The scraper mechanism further comprises a connecting plate, which is mounted above the scraper lifting mounting seat 4, and is located on both sides of the first driving device and the second driving device. The second pressure plate 6 is mounted above the connecting plate.

[0024] The second transmission device includes an arm plate 7 and a rear connecting plate 15, wherein the rear connecting plate 15 is respectively connected to the second driving device and the arm plate 7, and the rear scraper holder 10 is installed at the front end of the arm plate 7; the second driving device drives the rear connecting plate 15 to move while driving the arm plate 7 to move, and the arm plate 7 drives the rear scraper holder 10 to move; the second driving device is a motor.

[0025] The scraper mechanism also includes a lower limit sensing plate 19 and an upper limit sensing plate 20, and the lower limit sensing plate 19 and the upper limit sensing plate 20 are used to limit the up and down movement range of the scraper; the new scraper mechanism also includes a scraper limit block, and the scraper limit block is installed on the first front connecting plate 13, and the scraper limit block is used to prevent the scraper from shaking left and right.

[0026] The scraper mechanism further includes a spring 3, the pressure sensing device is a pressure sensor 5, one end of the spring 3 is installed below the pressure block 1, the other end of the spring 3 passes through the first pressure plate 2 and is installed on the pressure sensor 5, and the pressure sensor 5 is installed on the second pressure plate 6. The scraper mechanism further includes a spring guide column 8, and the spring guide column 8 is used to guide the movement direction of the first compression spring and the second compression spring 18.

[0027] Working principle of the present invention:

[0028] The scraper lifting mounting seat 4 is respectively equipped with elastic guide columns at the four top corners, and the first scraper motor (first drive device) and the second scraper motor (second drive device) are fixed above the scraper lifting mounting seat 4. The two motors are surrounded by a connecting plate, and a first pressure plate 2 is provided at the top of the connecting plate. A pressure sensor 5 is installed above the first pressure plate 2, and the pressure sensor 5 is connected to the pressure block 1 and the first pressure plate 2 through a spring 3, thereby sensing the change of force. The top ends of the four elastic guide columns are fixedly connected to the first pressure plate 2, and the scraper lifting mounting seat 4 is not directly connected to the scraper crossbeam, but the bottom end of the elastic guide column is fixedly connected to the scraper lifting mounting seat 4, and two compression springs are installed from the bottom end to the top end of the elastic guide column, one is installed in the scraper lifting mounting seat 4, and the other is installed between the top end of the scraper lifting mounting seat 4 and the first pressure plate 2. When the scraper is conveyed, the spring 3 structure helps to reduce vibration. When the scraper contacts the steel mesh, the pressure sensor 5 can monitor the contact force and give timely feedback. The spring structure, as a buffer mechanism, can effectively reduce the pressure when the scraper contacts the steel mesh, so that the contact force is maintained at a relatively stable level, protecting the steel mesh from damage.

[0029] The shaft end of the motor (first drive device) is connected to the screw rod 12 through a coupling, the screw rod nut is fixed to the first front connecting plate 13, and the two sides of the first front connecting plate 13 are connected to the slide rail sliders fixed on the scraper lifting mounting seat 4. When the front scraper is transported, the motor (first drive device) drives the screw rod 12, and the screw rod nut drives the first front connecting plate 13. The front support shaft 16 is installed on the first front connecting plate 13, and the front support shaft 16 is connected to the second front connecting plate 17. The front scraper frame 10 is installed on the second front connecting plate 17. In order to prevent the scraper from shaking left and right, a scraper limit block is installed on the front connecting plate.

[0030] The second driving device is a motor, which is connected to the rear connecting plate 15. An arm plate 7 is installed on the connecting plate 15. The arm plate 7 has a rear scraper holder 21 installed at the front end. The second driving device drives the rear connecting plate 15 to move while driving the arm plate 7 to move. The arm plate 7 drives the rear scraper holder 21 to move.

[0031] The scraper is conveyed up and down with limit sensors (lower limit sensor 19, upper limit sensor 20), which is used to limit the up and down movement range of the scraper. The front and rear scraper holders are respectively installed under the front connecting plate 13, and the front connecting plate 13 is installed on the front support shaft. The front support shaft is connected and fixed to the front connecting plate 1.

[0032] The invention also discloses a solder paste machine, which comprises the scraper mechanism described in the invention.

[0033] The beneficial effects of the present invention are as follows: 1. The scraper mechanism of the present invention utilizes a spring plus a pressure plate to ensure smooth scraper transportation; 2. The scraper mechanism of the present invention only needs to install one pressure sensor, which reduces the cost; 3. The scraper mechanism of the present invention can detect pressure changes in real time.

[0034] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A scraper mechanism, characterized in that: The invention comprises a pressure block (1), a scraper lifting mounting seat (4), a first driving device, a second driving device, a guide column, a first pressure plate (2), a second pressure plate (6), a pressure sensing device, a first transmission device, a second transmission device, a front scraper holder (10), and a rear scraper holder (21), wherein the first driving device and the second driving device are respectively mounted above the scraper lifting mounting seat (4), the second pressure plate (6) is mounted above the first driving device and the second driving device, the pressure sensing device is mounted on the second pressure plate (6), and the first pressure plate (21) is mounted between the pressure sensing device and the pressure block (1). ), and the pressure sensing device is respectively connected to the pressure block (1) and the first pressure plate (2); the first transmission device and the second transmission device are respectively installed below the scraper lifting mounting seat (4), one end of the first transmission device is connected to the first drive device, and the other end of the first transmission device is connected to the front scraper holder (10), one end of the second transmission device is connected to the second drive device, and the other end of the second transmission device is connected to the rear scraper holder (21); four guide posts are respectively provided at four top corners of the scraper lifting mounting seat (4), and the four guide posts are respectively connected to the first pressure plate (2); The elastic guide column comprises a mounting seat (11) and an elastic component, the mounting seats (11) are respectively mounted at four top corners of the scraper lifting mounting seat (4), the elastic component is mounted in the mounting seat (11), and the elastic component is connected to the first pressure plate (2); The elastic component comprises a first compression spring and a second compression spring (18), the first compression spring is installed in the mounting seat (11), the second compression spring (18) is installed below the first pressure plate (2), and the first compression spring is connected to the second compression spring (18); the guide column further comprises a first washer (14) and a second washer, the first washer (14) is installed between the first compression spring and the second compression spring, and the second washer is installed between the second compression spring and the first pressure plate (2); The first transmission device comprises a screw rod (12), a screw rod nut, a first front connecting plate (13), a front support shaft (16), and a second front connecting plate (17); the first driving device is connected to the screw rod (12); the screw rod nut is mounted on the screw rod (12); the first front connecting plate (13) is mounted on the screw rod nut; the front support shaft (16) is mounted on the first front connecting plate (13); the front support shaft (16) is connected to the second front connecting plate (17); the front scraper holder (10) is mounted on the second front connecting plate (17); the first driving device drives the screw rod (12) to rotate; the screw rod (12) rotates and simultaneously drives the screw rod nut to move; the screw rod nut drives the first front connecting plate (13) and the front support shaft (16) connected to the first front connecting plate (13) to move; the front support shaft (16) moves and simultaneously drives the second front connecting plate (17) to move; the second front connecting plate (17) drives the front scraper holder (10) to move; The scraper mechanism further comprises a lower limit sensing plate (19) and an upper limit sensing plate (20), wherein the lower limit sensing plate (19) and the upper limit sensing plate (20) are used to limit the upward and downward movement range of the scraper; the scraper mechanism further comprises a scraper limit block, wherein the first front connecting plate (13) is provided with the scraper limit block, and the scraper limit block is used to prevent the scraper from shaking left and right; The scraper mechanism further comprises a spring, the pressure sensing device is a pressure sensor (5), one end of the spring (3) is mounted below the pressure block (1), the other end of the spring (3) passes through the first pressure plate (2) and is mounted on the pressure sensor (5), and the pressure sensor (5) is mounted on the second pressure plate (6); the scraper mechanism further comprises a spring guide column (8).

2. The scraper mechanism according to claim 1, characterized in that: The first transmission device also includes a sliding device, the sliding device is mounted on the scraper lifting mounting seat (4), and the sliding device is arranged on both sides of the screw (12); the sliding device includes a slide rail and a slider, the slider is mounted on the slide rail, and the slider can slide along the slide rail, and the first front connecting plate (13) is respectively connected to the screw nut and the sliders on both sides of the screw nut; the first transmission device also includes a coupling, the first driving device is a motor (9), and the motor shaft end is connected to the screw (12) through the coupling.

3. The scraper mechanism according to claim 1, characterized in that: The scraper mechanism also includes a connecting plate, which is mounted above the scraper lifting mounting seat (4), the connecting plate is located on both sides of the first driving device and the second driving device, and the second pressure plate (6) is mounted above the connecting plate.

4. The scraper mechanism according to claim 1, characterized in that: The second transmission device comprises an arm plate (7) and a rear connecting plate (15); the rear connecting plate (15) is connected to the second driving device and the arm plate (7) respectively; the rear scraper holder (21) is mounted on the front end of the arm plate (7); the second driving device drives the rear connecting plate (15) to move while driving the arm plate (7) to move; the arm plate (7) drives the rear scraper holder (21) to move; the second driving device is a motor.

5. A solder paste machine, characterized in that: The solder paste machine comprises the scraper mechanism according to any one of claims 1 to 4.

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