A tray quick change assembly

Abstract

The utility model relates to the field of patching machine accessories, concretely to a tray quick replacement subassembly, including moving assembly and tray, the tray swing installation is in moving assembly top, moving assembly is provided with two parallel guide rails, even a plurality of driving wheels are inserted to the guide rail, the top of driving wheel is provided with contact disc, the middle part of contact disc is penetrated and is installed with driven gear one end of drive rod, drive rod passes the guide rail, the gear rack is set up below the guide rail of moving assembly, the gear rack is engaged with driven gear, the upper surface of guide rail is set up and is provided with limit hole, solved the present structure after completing once positioning use, need through manual intervention or complex mechanical linkage to make tray to separate from the positioning state and to have the mobile ability again, the technical problem that the disc changing operation process is complicated, overall replacement efficiency is lower.

Description

Technical Field

[0001] This utility model relates to the field of pick and place machine accessories, specifically to a tray quick change component. Background Technology

[0002] In the field of electronic manufacturing equipment, tray handling technology, which is used in conjunction with pick-and-place machines, refers to the related equipment components that move, position, and replace the trays carrying the components to be placed when the pick-and-place machine is performing electronic component placement operations. It is an important supporting part to ensure the continuous and stable operation of the pick-and-place machine and improve the accuracy and efficiency of component placement. It is directly related to the smoothness and accuracy of the entire process from picking up the components from the tray to placing them on the PCB board.

[0003] In existing tray movement and replacement structures used in pick-and-place machines, the existing tray cannot be quickly and accurately positioned after being moved to the target location. During subsequent pick-and-place machine material handling, the tray is prone to displacement, affecting material handling accuracy. After completing one positioning use, the existing structure requires manual intervention or complex mechanical linkage to remove the tray from the positioning state and regain its movement capability. The tray replacement operation process is cumbersome, and the overall replacement efficiency is low. It is difficult to simultaneously meet the comprehensive requirements of rapid tray movement, accurate positioning, stable use, and efficient replacement. Utility Model Content

[0004] The purpose of this utility model is to solve the above-mentioned defects and provide a quick pallet replacement component. This component solves the technical problem that after a single positioning use, the existing structure requires manual intervention or complex mechanical linkage to remove the pallet from its positioning state and regain its mobility, resulting in a cumbersome pallet replacement process and low overall replacement efficiency.

[0005] The purpose of this utility model is achieved through the following means: a quick-change pallet assembly, comprising a movable assembly and a pallet, wherein the pallet is movably mounted above the movable assembly, the movable assembly is provided with two parallel guide rails, a plurality of drive wheels are evenly inserted into the guide rails, a contact plate is provided on the top of the drive wheels, a drive rod passes through the middle of the contact plate, a driven gear is installed at one end of the drive rod passing through the guide rail, a rack is provided below the guide rails of the movable assembly, the rack meshes with the driven gear, a limit hole is provided on the upper surface of the guide rails, an electric push rod is fixedly installed below the limit hole on the guide rails, the output end of the electric push rod passes through the guide rails and stops at the bottom of the limit hole, mounting holes are provided at the four corners of the bottom of the pallet, a universal ball is installed inside the mounting hole, an anti-detachment block is provided at the opening of the mounting hole, and the position of the limit hole corresponds to the universal ball.

[0006] The rack drives the driven gear to rotate through gear engagement, which in turn drives the coaxial drive rod and the contact plate to rotate synchronously. The contact plate contacts the side wall of the pallet, and the friction force drives the pallet to move along the guide rail. At the same time, the universal ball at the bottom of the pallet can roll along the surface of the guide rail, reducing the frictional resistance when the pallet moves. The electric push rod is initially in the retracted state and does not affect the movement of the universal ball. When the pallet moves to the target position, the universal ball is precisely aligned with the limiting hole and falls into the hole, realizing the mechanical limiting and fixing of the pallet. The anti-detachment block can prevent the universal ball from coming out of the mounting hole. After the material is picked up, the electric push rod pushes the universal ball to raise the pallet and move it again, waiting for the next pallet to enter, completing the pallet changing operation.

[0007] Preferably, the contact plate is wrapped with a lint-free cloth, and the outer wall of the contact plate is in contact with the tray.

[0008] Cleanroom wipes are characterized by their fine fibers and low shedding. When wrapped around the contact tray, they prevent dust particles from being generated when the contact tray rubs against the pallet. The surface of the cleanroom wipe has a certain degree of friction, so wrapping it does not affect the power transmission between the contact tray and the pallet, ensuring that the pallet can be driven stably.

[0009] Preferably, an anti-slip pad is provided at the bottom of the tray corresponding to the guide rail, and the thickness of the anti-slip pad is equal to the thickness of the anti-detachment block.

[0010] After the pallet is positioned by the omnidirectional ball, the pallet height decreases, and the anti-slip pad contacts the guide rail surface. The high coefficient of friction of the anti-slip pad increases the static friction between the pallet and the guide rail. The thickness of the anti-slip pad is the same as that of the anti-detachment block, which can ensure that the height of each support point at the bottom of the pallet is level and prevent the pallet from tilting due to uneven force.

[0011] Preferably, the radii of the limiting hole and the mounting hole are equal, the radius of the universal ball is smaller than the radius of the mounting hole, and the opening size of the anti-detachment block is smaller than the radius of the universal ball.

[0012] The radii of the limiting hole and the mounting hole are equal, which can ensure the coaxiality of the omnidirectional ball when it falls into the limiting hole and achieve precise positioning; the radius of the omnidirectional ball is smaller than the radius of the mounting hole, which provides rotation space for the omnidirectional ball and ensures that it can roll flexibly; the opening size of the anti-detachment block is smaller than the radius of the omnidirectional ball, which can limit the displacement range of the omnidirectional ball through mechanical blocking and prevent it from falling out of the mounting hole.

[0013] Preferably, the rack is externally connected to a drive mechanism, and the rack moves in the direction in which the tray arrives.

[0014] The external drive mechanism provides linear motion power to the rack. The rack can be started, stopped, speed adjusted and direction controlled by devices such as motors and cylinders. The rack moves in the direction the pallet is coming from, and drives the driven gear to rotate in the forward direction through the meshing action. This causes the contact plate to generate a frictional force in the same direction as the pallet's target movement, thus realizing the forward transport of the pallet.

[0015] Preferably, when the omnidirectional ball falls into the limiting hole, the lower sides of the tray detach from the contact plate.

[0016] During the movement of the pallet, the contact plate provides support and drives its movement; when the omnidirectional ball falls into the limiting hole, the pallet sinks slightly under the action of gravity, causing the bottom sides to disengage from the contact plate. The support point changes from the contact plate to the cooperation structure between the omnidirectional ball and the limiting hole. After the contact plate and the pallet are separated, the friction between them is reduced, and the rotation of the contact plate no longer generates driving force or interference force on the pallet.

[0017] The beneficial effects of this invention are as follows: In the quick pallet change assembly, the universal ball joint makes the pallet slide more smoothly on the moving assembly. Through the stable transmission of the gear and rack, it can drive the drive wheel to rotate synchronously, thereby assisting the pallet to achieve smooth and controllable movement. The position of the limiting hole corresponds to the universal ball joint in the mounting holes at the four corners of the bottom of the pallet. When the pallet moves to the target position, the universal ball joint falls into the limiting hole, realizing the rapid positioning of the pallet and preventing the pallet from shifting during subsequent use, thus ensuring the accuracy of the pallet position. The anti-detachment block at the opening of the mounting hole increases the friction of the pallet after the universal ball joint enters the limiting hole, ensuring that the pallet remains stationary under the influence of the contact plate, thus ensuring the stability of the pick-and-place machine during material handling. The universal ball joint can be pushed out by the electric push rod, which simultaneously raises the pallet, allowing it to regain the friction of the contact plate and move again to complete the pallet change. Through the synergistic effect of its various structures, this assembly can achieve both rapid movement and precise positioning of the pallet, improving pallet change efficiency, while also ensuring stability and reliability during the change process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the tray of this utility model; Figure 3 is Schematic diagram of the drive wheel structure of this utility model; Figure 4 This is a partial cross-sectional view of the guide rail of this utility model; Figure 5 This utility model Figure 2 Enlarged view of the structure at point A.

[0019] In the diagram: 100, moving component; 101, guide rail; 102, drive wheel; 103, contact plate; 104, drive rod; 105, driven gear; 106, limit hole; 107, electric push rod; 108, rack; 200, tray; 202, mounting hole; 203, anti-detachment block; 204, omnidirectional ball. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] In this embodiment, refer to Figure 1 - Figure 5 A specific implementation of a quick-change pallet assembly includes a movable assembly 100 and a pallet 200. The pallet 200 is movably mounted above the movable assembly 100. The movable assembly 100 is provided with two parallel guide rails 101. A plurality of drive wheels 102 are evenly inserted into the guide rails 101. A contact plate 103 is provided on the top of the drive wheel 102. A drive rod 104 passes through the middle of the contact plate 103. A driven gear 105 is installed at one end of the drive rod 104 that passes through the guide rails 101. A rack is provided below the guide rails 101 in the movable assembly 100. 108, the rack 108 meshes with the driven gear 105, the upper surface of the guide rail 101 has a limiting hole 106, an electric push rod 107 is fixedly installed on the guide rail 101 below the limiting hole 106, the output end of the electric push rod 107 passes through the guide rail 101 and stops at the bottom of the limiting hole 106, the bottom of the tray 200 has mounting holes 202 at each of the four corners, a universal ball 204 is installed inside the mounting hole 202, an anti-detachment block 203 is provided at the opening of the mounting hole 202, and the limiting hole 106 is opened in a position corresponding to the universal ball 204.

[0022] The rack 108 drives the driven gear 105 to rotate through the meshing action. The driven gear 105 drives the coaxial drive rod 104 and the contact plate 103 to rotate synchronously. The contact plate 103 contacts the side wall of the tray 200 and drives the tray 200 to move along the guide rail 101 through friction. At the same time, the universal ball 204 at the bottom of the tray 200 can roll along the surface of the guide rail 101 to reduce the frictional resistance when the tray 200 moves. The electric push rod 107 is initially in the retracted state and does not affect the movement of the universal ball 204. When the tray 200 moves to the target position, the universal ball 204 is precisely aligned with the limiting hole 106 and falls into the hole to achieve mechanical limiting and fixing of the tray 200. The anti-detachment block 203 can prevent the universal ball 204 from detaching from the mounting hole 202. After the material is picked up, the electric push rod 107 pushes the universal ball 204 to make the tray 200 rise and move again, waiting for the next tray 200 to enter, completing the tray changing operation.

[0023] The low-friction characteristics of the omnidirectional ball 204 enable the pallet 200 to move smoothly and quickly, greatly improving the pallet 200 replacement efficiency and adapting to the fast-paced needs of automated production lines. The corresponding design of the limit hole 106 and the omnidirectional ball 204 enables the pallet 200 to be accurately positioned, preventing the pallet 200 from shifting and affecting subsequent operations. The anti-detachment block 203 enhances the reliability of component connections and reduces the risk of equipment failure.

[0024] Preferably, the contact plate 103 is wrapped with a lint-free cloth, and the outer wall tray 200 of the contact plate 103 is in contact with it.

[0025] The cleanroom cloth has the characteristics of fine fibers and is not easy to shed. After wrapping the contact plate 103, it can prevent dust particles from being generated when the contact plate 103 rubs against the tray 200. The surface of the cleanroom cloth has a certain friction, so wrapping it does not affect the power transmission between the contact plate 103 and the tray 200, ensuring that the tray 200 can be driven stably.

[0026] The lint-free cloth is soft, which can prevent increased friction and avoid surface wear caused by direct rigid friction between the contact disc 103 and the tray 200, thus extending the service life of both.

[0027] Preferably, an anti-slip pad is provided at the bottom of the tray 200 corresponding to the guide rail 101, and the thickness of the anti-slip pad is equal to the thickness of the anti-detachment block 203.

[0028] After the pallet 200 is positioned by the universal ball 204, the height of the pallet 200 decreases, and the anti-slip pad contacts the surface of the guide rail 101. The high coefficient of friction of the anti-slip pad increases the static friction between the pallet 200 and the guide rail 101. The thickness of the anti-slip pad is the same as the thickness of the anti-detachment block 203, which can ensure that the height of each support point at the bottom of the pallet 200 is level, and prevent the pallet 200 from tilting due to uneven force.

[0029] Keeping the pallet 200 horizontal ensures that the weight of the load is evenly distributed, preventing excessive local stress that could damage the item or deform the pallet 200.

[0030] Preferably, the radius of the limiting hole 106 is equal to that of the mounting hole 202, the radius of the universal ball 204 is smaller than that of the mounting hole 202, and the opening size of the anti-detachment block 203 is smaller than that of the universal ball 204.

[0031] The radii of the limiting hole 106 and the mounting hole 202 are equal, which can ensure the coaxiality of the universal ball 204 when it falls into the limiting hole 106 and achieve precise positioning. The radius of the universal ball 204 is smaller than the radius of the mounting hole 202, which provides rotation space for the universal ball 204 and ensures that it can roll flexibly. The opening size of the anti-detachment block 203 is smaller than the radius of the universal ball 204, which can limit the displacement range of the universal ball 204 through mechanical blocking and prevent it from falling out of the mounting hole 202.

[0032] The coaxial design reduces the clearance between the universal ball 204 and the limiting hole 106, improves the positioning accuracy of the tray 200, and meets the requirements of precision operation. The flexible rotation characteristics of the universal ball 204 can reduce movement resistance and improve the smoothness of the tray 200 operation.

[0033] Preferably, the rack 108 is externally connected to a drive mechanism, and the rack 108 moves in the direction of the tray 200.

[0034] The external drive mechanism provides linear motion power to the rack 108. The rack 108 can be started, stopped, speed adjusted and direction controlled by the motor, cylinder and other equipment. The rack 108 moves in the direction that the pallet 200 is coming from. The rack 108 drives the driven gear 105 to rotate in the forward direction through the meshing action. This causes the contact plate 103 to generate a frictional force in the same direction as the target movement of the pallet 200, so as to realize the forward conveying of the pallet 200.

[0035] The external drive mechanism, in conjunction with the rack 108, allows for precise control of the pallet 200's moving speed and start / stop timing, adapting to conveying needs under different working conditions.

[0036] Preferably, when the omnidirectional ball 204 falls into the limiting hole 106, the lower sides of the tray 200 disengage from the contact plate 103.

[0037] During the movement of the tray 200, the contact plate 103 provides support and drives its movement. When the universal ball 204 falls into the limiting hole 106, the tray 200 sinks slightly under the action of gravity, causing the bottom sides to disengage from the contact plate 103. The support point changes from the contact plate 103 to the mating structure of the universal ball 204 and the limiting hole 106. After the contact plate 103 disengages from the tray 200, the friction between the two decreases, and the rotation of the contact plate 103 no longer generates driving force or interference force on the tray 200.

[0038] To prevent the continuous rotation of the contact plate 103 from generating lateral force on the positioned pallet 200, thus preventing the pallet 200 from shifting during operation and improving positioning reliability.

[0039] The working process of a quick-change pallet assembly in this embodiment is as follows: After the rack 108 of the moving assembly 100 is connected to the external drive mechanism, it moves toward the pallet 200. By driving the driven gear 105 to rotate, it drives the coaxial drive rod 104 and the top contact plate 103 to rotate synchronously. The contact plate 103 contacts the side wall of the pallet 200, and the pallet 200 moves along the guide rail 101 by means of friction. The universal balls 204 in the four corner mounting holes 202 at the bottom of the pallet 200 roll along the surface of the guide rail 101 to reduce the frictional resistance. At this time, the electric push rod 107 is in the retracted state. When the pallet 200 reaches the target position, the universal balls 204 and the guide rail... The limiting hole 106 on 101 is precisely aligned and falls into the hole. The tray 200 sinks slightly under the action of gravity, and the two sides are no longer in contact with the contact plate 103. The support point is switched to the structure of the universal ball 204 cooperating with the limiting hole 106 to realize the mechanical limiting and fixing of the tray 200. The anti-detachment block 203 with the opening of the mounting hole 202 restricts the universal ball 204 from coming out, ensuring stable positioning. After the material is picked up, the output end of the electric push rod 107 pushes the universal ball 204 in the limiting hole 106 upward, so that the tray 200 rises and resets, and re-contacts the contact plate 103 to obtain friction. Then it can move away and wait for the next tray 200 to enter, completing the entire tray changing process.

Claims

1. A quick-change pallet assembly, comprising a movable component (100) and a pallet (200), the pallet 200 being movably mounted above the movable component (100), characterized in that, The moving component (100) is provided with two parallel guide rails (101). Several drive wheels (102) are evenly inserted into the guide rails (101). A contact plate (103) is provided at the top of each drive wheel (102). A drive rod (104) passes through the middle of the contact plate (103). A driven gear (105) is installed at one end of the drive rod (104) that passes through the guide rails (101). A rack (108) is provided below the guide rails (101) of the moving component (100). The rack (108) meshes with the driven gear (105). A limiting hole (106) is provided on the upper surface of the guide rail (101). An electric push rod (107) is fixedly installed below the limiting hole (106) on the guide rail (101). The output end of the electric push rod (107) passes through the guide rail (101) and stops at the bottom of the limiting hole (106). Mounting holes (202) are provided at the four corners of the bottom of the tray (200). A universal ball (204) is installed inside the mounting hole (202). An anti-detachment block (203) is provided at the opening of the mounting hole (202). The opening position of the limiting hole (106) corresponds to the universal ball (204).

2. The tray quick-change assembly according to claim 1, characterized in that: The contact plate (103) is wrapped with a lint-free cloth, and the outer wall of the contact plate (103) is in contact with the tray (200).

3. The tray quick-change assembly according to claim 1, characterized in that: The bottom of the tray (200) is provided with an anti-slip pad corresponding to the guide rail (101), and the thickness of the anti-slip pad is equal to the thickness of the anti-detachment block (203).

4. The tray quick-change assembly according to claim 1, characterized in that: The radii of the limiting hole (106) and the mounting hole (202) are equal, the radius of the universal ball (204) is smaller than the radius of the mounting hole (202), and the opening size of the anti-detachment block (203) is smaller than the radius of the universal ball (204).

5. A tray quick-change assembly according to claim 1, characterized in that: The rack (108) is externally connected to a drive mechanism, and the rack (108) moves in the direction that the tray (200) comes from.

6. The tray quick-change assembly according to claim 1, characterized in that: When the omnidirectional ball (204) falls into the limiting hole (106), the lower sides of the tray (200) detach from the contact plate (103).

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