Downward pressing mechanism

Abstract

The utility model discloses a downward pressing mechanism, and relates to the technical field of surface-mount die bonding devices. The downward pressing mechanism comprises a servo motor, an inclined plane shaft, a vertical pressing transverse strip and a downward pressing roller; the servo motor is connected with the inclined plane shaft, the servo motor can drive the inclined plane shaft to rotate, the vertical pressing transverse strip is arranged below the inclined plane shaft, one end of the vertical pressing transverse strip is provided with the contact ball, the other end of the vertical pressing transverse strip is provided with the linear bearing, and the downward pressing roller is arranged at the bottom of the linear bearing. The utility model provides a downward pressing mechanism which is simple and reliable in structure, easy to machine and low in cost. Through the arrangement of the inclined plane shaft, the structure is compact, the long service life under high-speed production can be realized, and the bonding head height can be reduced and the bonding head stability and precision can be improved when the bonding head is applied to a chip mounter or a die bonder.

Description

Technical Field

[0001] This utility model relates to the field of chip die bonding device technology, and in particular to a pressing mechanism. Background Technology

[0002] In chip bonding machines, the die attach and bonding pads need to be made lighter to improve efficiency, and their load-bearing axial dimensions need to be shortened to improve accuracy. Therefore, in die bonders and chip mounters, the pressing mechanism is typically externalized to reduce the bonding pad weight. By designing a compact pressing mechanism, the load-bearing axial dimension of the bonding pad can be reduced. However, these improvements also place higher demands on the pressing mechanism, requiring it to be high-speed, long-life, and compact. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a pressing mechanism.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A pressing mechanism is provided, including a servo motor, an inclined shaft, a vertical pressing bar, and a pressing roller; the servo motor is connected to the inclined shaft and can drive the inclined shaft to rotate; the vertical pressing bar is located below the inclined shaft; one end of the vertical pressing bar is provided with a contact ball, and the other end of the vertical pressing bar is provided with a linear bearing; the pressing roller is located at the bottom of the linear bearing.

[0006] The inclined shaft rotates to form a periodic downward displacement (pressing motion), and the contact ball contacts the inclined surface at the bottom of the inclined shaft to transmit the downward force; the linear bearing is used to constrain the degree of freedom of the pressing motion and save horizontal space; the servo motor is vertically mounted on the inclined shaft and provides rotational power through the connection of the servo motor to the inclined shaft.

[0007] Furthermore, the inclined shaft is provided with a first screw, a ball spring, and a ball connected in sequence.

[0008] Furthermore, one side of the inclined shaft is provided with an inclined opening, a first set screw is embedded in the inclined opening, and a grease layer is provided between the inclined opening and the first set screw.

[0009] The lubrication design, which uses the first screw, ball spring, ball and first set screw to form an inclined shaft, makes the structure wear-resistant and has a long service life.

[0010] Preferably, the vertical pressure bar is provided with a second screw, and the contact ball is connected to the vertical pressure bar through the second screw.

[0011] Preferably, the contact ball contacts the inclined surface at the bottom of the inclined shaft.

[0012] Furthermore, the pressing mechanism also includes a spring, which is sleeved outside the linear bearing. The linear bearing has a pressing shaft inside, which is slidably connected to the inner wall of the linear bearing. The pressing roller is located at the bottom of the pressing shaft.

[0013] Preferably, the spring is disposed between the linear bearing and the vertical crossbar.

[0014] Preferably, the top of the pressure shaft is provided with a second set screw, and the vertical pressure bar is connected to the second set screw of the pressure shaft.

[0015] Furthermore, the pressing mechanism also includes a roller connecting block, and the pressing shaft is connected to the pressing roller through the roller connecting block.

[0016] Preferably, the pressing shaft is connected to the roller connecting block by a third screw, and the pressing roller is connected to the roller connecting hole by a fourth screw.

[0017] Furthermore, the servo motor has a motor connecting block at its bottom, which is sleeved on the outside of the inclined shaft.

[0018] Furthermore, the pressing mechanism also includes a home-mounted sheet metal component, which is connected to the motor connecting block.

[0019] Furthermore, the bottom of the original mounting sheet metal component is provided with a groove-shaped photoelectric sensor.

[0020] Furthermore, the pressing mechanism also includes a motor mounting base, the lower part of which is connected to a linear bearing, and the upper part of which is connected to a motor connecting block.

[0021] Preferably, the lower part of the motor mounting base is connected to the linear bearing by a fifth screw.

[0022] Preferably, the vertical pressure bar passes through the middle of the motor mounting base, and the vertical pressure bar can move up and down.

[0023] Furthermore, the pressing mechanism also includes a structural mounting plate, which is connected to one side of the motor mounting base.

[0024] Preferably, the structural mounting plate is positioned below the vertical pressure bar.

[0025] This utility model provides a pressing mechanism with a simple, reliable, easy-to-process, and low-cost structure. With the setting of the inclined shaft, the structure is compact and can achieve a long service life under high-speed production. When applied in chip mounters or die bonders, it can reduce the height of the bonding head and improve the stability and accuracy of the bonding head. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an isometric view of the pressing mechanism according to an embodiment of the present invention;

[0028] Figure 2 This is a supplementary view of the inclined plane shaft of the pressing mechanism in an embodiment of the present invention;

[0029] Figure 3 This is a side view of the pressing mechanism according to an embodiment of the present utility model;

[0030] Figure 4 for Figure 3 Cross-sectional view along the BB direction;

[0031] Explanation of the markings in the image:

[0032] 1-Servo motor; 2-Inclined shaft; 3-Vertical pressure bar; 4-Press roller; 5-Contact ball; 6-Linear bearing; 7-First screw; 8-Ball spring; 9-Ball; 10-First set screw; 11-Motor connecting block; 12-Origin mounting sheet metal part; 13-Slotted photoelectric sensor; 14-Spring; 15-Press shaft; 16-Roller connecting block; 17-Motor mounting base; 18-Structural mounting plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0035] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] Example

[0037] Please see Figures 1-4 The pressing mechanism shown includes a servo motor 1, an inclined shaft 2, a vertical pressing bar 3, and a pressing roller 4. The servo motor 1 is connected to the inclined shaft 2 and can drive the inclined shaft 2. The vertical pressing bar 3 is located below the inclined shaft 2. One end of the vertical pressing bar 3 is equipped with a contact ball 5, and the other end is equipped with a linear bearing 6. The pressing roller 4 is located at the bottom of the linear bearing 6. The inclined shaft 2 rotates to form a periodic downward displacement (pressing motion). The contact ball 5 contacts the inclined surface at the bottom of the inclined shaft 2, transmitting the downward force. The linear bearing 6 is used to constrain the degree of freedom of the pressing motion, saving horizontal space. The servo motor 1 is vertically mounted on the inclined shaft 2, and the servo motor 1 provides rotational power to the inclined shaft 2.

[0038] The inclined shaft 2 contains a first screw 7, a ball spring 8, and a ball 9 connected in sequence. One side of the inclined shaft 2 has a bevel, within which a first setter screw 10 is embedded, and a grease layer is provided between the bevel and the first setter screw 10. This lubrication design of the inclined shaft 2, formed by the first screw 7, ball spring 8, ball 9, and first setter screw 10, makes the structure wear-resistant and has a long service life. A second screw is located within the vertical pressure bar 3, and a contact ball 5 is connected to the vertical pressure bar 3 via the second screw. The contact ball 5 contacts the inclined surface at the bottom of the inclined shaft 2.

[0039] The servo motor 1 has a motor connecting block 11 at its bottom, which is sleeved on the inclined shaft 2. It also includes a home-mounted sheet metal component 12, which is connected to the motor connecting block 11. The bottom of the home-mounted sheet metal component 12 has a grooved photoelectric sensor 13. The pressing mechanism also includes a spring 14, which is sleeved on the linear bearing 6. A pressing shaft 15 is located inside the linear bearing 6 and is slidably connected to the inner wall of the linear bearing 6. The pressing roller 4 is located at the bottom of the pressing shaft 15. In this embodiment, the spring 14 is located between the linear bearing 6 and the vertical pressure bar 3. The top of the pressing shaft 15 has a second set screw, and the vertical pressure bar 3 is connected to the second set screw of the pressing shaft 15. The pressing mechanism also includes a roller connecting block 16, through which the pressing shaft 15 is connected to the pressing roller 4. In this embodiment, the pressing shaft 15 is connected to the roller connection 16 via a third screw, and the pressing roller 4 is connected to the roller connection hole via a fourth screw. The pressing mechanism also includes a motor mounting base 17, the lower part of which is connected to the linear bearing 6, and the upper part of which is connected to the motor connecting block 11. In this embodiment, the lower part of the motor mounting base 17 is connected to the linear bearing 6 via a fifth screw. The vertical pressure bar 3 passes through the middle of the motor mounting base 17 and can move up and down. A structural mounting plate 18 is also included, which is connected to one side of the motor mounting base 17. In this embodiment, the structural mounting plate 18 is positioned below the vertical pressure bar 3.

[0040] When the pressing mechanism moves, the contact ball 5, with pressure transmitted by the ball spring 8, makes close contact with the inclined surface at the bottom of the inclined shaft 2. The servo motor 1 drives the inclined shaft 2 to rotate, creating a periodic downward displacement. This displacement is output, and the radial movement is converted into rotational friction via the contact ball 5. The contact ball 5 presses down, and the axial displacement is constrained to one degree of freedom by the linear bearing 6 (the linear bearing 6 restricts rotation). Finally, the pressing roller 4 presses down, realizing the pressing of the arm's swing arm. In this embodiment, the inclined shaft 2 is similar to a cam, converting rotational motion into axial displacement to achieve high-speed pressing. The internal lubrication design of the inclined shaft 2 reduces friction and increases its lifespan. The lubrication design of the inclined shaft 2 includes a first screw 7, a ball spring 8, balls 9, and a first set screw 10. Before the inclined shaft 2 rotates, the balls 9 are pressed tightly by the ball spring 8, with part of the balls 9 protruding from the inclined surface of the inclined shaft 2. Lubricating grease is injected into the inclined opening of the inclined shaft 2 to form a grease layer. The inclined opening is fitted with a first set screw 10, which seals the inclined opening. During the rotation process, the ball bearing 9 comes into periodic contact with the contacting ball bearing 5. The ball bearing 9 is pressed into the inclined shaft 2, undergoes displacement and rotation, and carries out the grease layer in the inclined opening, reducing friction and extending the structural life.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A pressing mechanism, characterized in that, It includes a servo motor, an inclined shaft, a vertical pressure bar, and a downward pressure roller; the servo motor is connected to the inclined shaft and can drive the inclined shaft to rotate; the vertical pressure bar is located below the inclined shaft, one end of the vertical pressure bar is provided with a contact ball, the other end of the vertical pressure bar is provided with a linear bearing, and the downward pressure roller is located at the bottom of the linear bearing.

2. The pressing mechanism as described in claim 1, characterized in that, The inclined shaft is provided with a first screw, a ball spring and a ball connected in sequence.

3. The pressing mechanism as described in claim 2, characterized in that, The inclined shaft has an inclined opening on one side, a first set screw is embedded in the inclined opening, and a grease layer is provided between the inclined opening and the first set screw.

4. The pressing mechanism as described in claim 3, characterized in that, It also includes a spring, which is sleeved outside the linear bearing. The linear bearing has a lower pressure shaft inside, which is slidably connected to the inner wall of the linear bearing. The lower pressure roller is located at the bottom of the lower pressure shaft.

5. The pressing mechanism as described in claim 4, characterized in that, It also includes a roller connecting block, through which the pressing shaft is connected to the pressing roller.

6. The pressing mechanism as described in claim 5, characterized in that, The servo motor has a motor connecting block at its bottom, which is sleeved on the outside of the inclined shaft.

7. The pressing mechanism as described in claim 6, characterized in that, It also includes a sheet metal component for origin mounting, which is connected to the motor connecting block.

8. The pressing mechanism as described in claim 7, characterized in that, The bottom of the original mounting sheet metal component is provided with a groove-shaped photoelectric sensor.

9. The pressing mechanism as described in claim 8, characterized in that, It also includes a motor mounting base, the lower part of which is connected to a linear bearing, and the upper part of which is connected to a motor connecting block.

10. The pressing mechanism as described in claim 9, characterized in that, It also includes a structural mounting plate, which is connected to one side of the motor mounting base.

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