A tray transmission system

Abstract

The present invention discloses a tray transmission system, which can be applied to a material counting device, and includes a loading device and a transmission device. The top of the guide rod of the loading device is provided with a visually identifiable structure, and the center hole of the material tray and the top structure of the guide rod are identified by a visual recognition device on a mechanical arm, so as to ensure that the center hole of the material tray passes through the guide rod accurately. The guide rod fixing structure in the present invention can firmly clamp the guide rod on the base of the loading device. During the material unloading process, it is only necessary to use the visual recognition device to identify the top structure of the guide rod once, which greatly improves the placement efficiency of the material tray. The transmission device includes a horizontal transmission unit, in which a hook claw and a push block capable of pushing and pulling the loading device are provided, so as to realize the step-by-step transportation of the loading device, and greatly reduce the volume of the transmission device while ensuring sufficient travel, saving space and floor space. A large and small tray identification device is also provided on one side of the transmission device, which can be applicable to a material counting machine with two production modes of large and small trays.

Description

Technical Field

[0001] The invention belongs to the technical field of material counting equipment, and in particular relates to a material tray transmission system. Background Art

[0002] At present, in the production process of circuit boards, surface mount technology (SMT: Surface Mount Technology) is usually used to install various capacitors, resistors and other electronic components on printed circuit boards (PCB: Printed Circuit Board). In this process, the use frequency of the capacitors, resistors and other electronic components is very high. Therefore, SMT manufacturers have particularly precise requirements for the update statistics of electronic components and other materials.

[0003] In the prior art, a material tray is usually used to hold the capacitors, resistors and other electronic components. A large number of parts are pasted on the material belt, and the material belt is rolled into a material tray. When loading and unloading the material on the material counting machine, in order to improve the transportation efficiency of the material tray, several material trays are usually stacked vertically together for transmission. For example, the Chinese patent with the authorization announcement number CN212098997U discloses a material cart, which sets several material placement positions on the base to achieve the purpose of storing a large number of material trays, and then realizes the rapid loading of the material trays through the cart body. However, for multi-station material counting equipment, the above-mentioned material cart still needs to be transported manually, so as to circulate between multiple stations, which is not only time-consuming and labor-intensive, but also the positioning accuracy of the material cart is not high.

[0004] In addition, the Chinese patent with the authorization announcement number CN209142942U also discloses an automatic storage system for SMT patch device trays, which includes a tray conveyor trolley, a material tray, a workstation frame, and a six-axis robot, a visual inspection system, an electrical control cabinet, and a tray grabbing mechanism arranged in the workstation frame. When in use, the automatic storage system for SMT patch device trays is combined with the SMT patch material intelligent storage system, which can greatly improve the efficiency and accuracy of SMT material storage, but the system still cannot realize the automatic transmission of the tray conveyor trolley. Moreover, the above tray transmission systems do not have the function of identifying large and small trays, and cannot be applied to the material counting machine with two production modes of large and small trays.

[0005] Therefore, it is necessary to provide a tray transmission system that can meet the requirements of high automation. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a tray transmission system that can meet the requirements of high automation, reduce labor intensity and improve production efficiency.

[0007] In order to achieve the above-mentioned invention object, the present invention provides the following technical solutions:

[0008] A tray transmission system, comprising:

[0009] A loading device, used for loading the tray;

[0010] and a transmission device for transmitting the material loading device.

[0011] The loading device comprises:

[0012] A base, wherein a plurality of guide devices are arranged on the base, and the plurality of guide devices include but are not limited to one or more of guide wheels, guide rails, and guide grooves;

[0013] A guide rod, the guide rod is fixedly mounted on the base, and the guide rod is an integrated structure or a segmented assembly structure;

[0014] The tray is used to carry the material tray. The tray is passed through the guide rod and can slide up and down along the guide rod.

[0015] The top of the guide rod is provided with a visually identifiable structure, which includes but is not limited to a hole, a groove, a protrusion, an insert, etc. For example, for the convenience of processing, the visually identifiable structure is preferably a round hole. When a plurality of trays need to be placed on the tray through the guide rod by a robot arm, the visual recognition device on the robot arm, preferably a camera recognition device, will instruct the robot arm to accurately place the tray by recognizing the center hole of the tray and the round hole on the top of the guide rod, to ensure that the center hole of the tray passes through the guide rod.

[0016] The guide rod is fixedly mounted on the base through a guide rod fixing structure, and the guide rod fixing structure includes a first positioning block, a second positioning block and a plurality of screws. The first positioning block is engaged with the end of the guide rod through a U-shaped groove thereon, thereby locking the guide rod in the circumferential direction. The second positioning block is provided with a receiving cavity adapted to the shape of the first positioning block. When the guide rod fixing structure is assembled, the first positioning block is clamped in the receiving cavity, and the end of the guide rod and the second positioning block are respectively fixedly connected to the base through the plurality of screws, so as to further lock the guide rod.

[0017] Usually, in order to improve the loading and unloading efficiency of the material tray, a considerable number of material trays need to be stacked on the slender guide rod. Excessive load can easily cause the guide rod to tilt or loosen. However, through the guide rod fixing structure described in the present invention, the guide rod can be firmly clamped on the base, and during the loading and unloading process of the material tray, the guide rod will not tilt or loosen. Therefore, during the unloading process, it is only necessary to use the visual recognition device to identify the circular hole once, which greatly improves the placement efficiency of the material tray.

[0018] A buffer block is connected under the tray by screws, so as to prevent the tray from being damaged due to accidental falling.

[0019] The base is preferably made of a lightweight material, and further preferably a lightweight metal material, such as an aluminum alloy, etc., which can reduce the weight of the device and save transportation energy while ensuring its mechanical strength. In addition, in order to increase the service life of the base, a number of hard material reinforcements are also provided at the stress-bearing parts thereof, and the hard material is preferably stainless steel.

[0020] The base also includes a plurality of first operating holes / grooves and second operating holes / grooves. The hook claws on the push-pull unit of the loading device can hook and pull the loading device through the first operating holes / grooves. When the loading device is located at the loading position, the tray lifting mechanism at the loading position can lift the tray through the second operating holes / grooves, thereby lifting the trays stacked on the tray.

[0021] In order to keep the loading device stable at the loading position, a number of positioning holes / grooves are also provided on the base, and the number of positioning holes / grooves cooperate with the positioning mechanism in the tray lifting mechanism to prevent the loading device from shaking or overturning during the lifting process and endangering production safety.

[0022] In addition, in order to facilitate manual movement of the loading device when necessary, the loading device further includes a push-pull handle. The push-pull handle may adopt any known structure in the art, which will not be described in detail herein.

[0023] The transmission device includes a horizontal transmission unit, and the horizontal transmission unit includes a first frame, a first transmission unit, a first sensing unit, and a material carrier push-pull unit. The first frame can adopt any known structure in the art, and only the specific structure and working principle of the first transmission unit, the first sensing unit, and the material carrier push-pull unit are described below.

[0024] The first transmission unit comprises:

[0025] A first servo motor is mounted on the first frame, wherein the output end of the first servo motor is provided with a first pulley and a first conveyor belt, wherein the first pulley is preferably a gear, and the first conveyor belt is preferably inner-belted with teeth, and the first conveyor belt with teeth can mesh with the tooth grooves on the first pulley to improve the stability of power transmission;

[0026] A first guide rail is installed on the first frame, and the push-pull unit of the loading device is slidably installed on the first guide rail.

[0027] The push-pull unit of the loading device includes a mounting frame, which is mounted on a slide, and the slide is mounted on the first guide rail via a slider fixed thereunder; a hook claw and a push block are provided on the mounting frame along the extension direction of the first guide rail, and a lifting cylinder is provided below the hook claw and the push block, and the lifting cylinder is fixedly mounted on the mounting frame.

[0028] The push-pull unit of the loading device is connected to the first conveyor belt through a fixing device. Preferably, the fixing device includes a first connecting block and a second connecting block fixedly connected to each other, the first connecting block and the second connecting block clamp the first conveyor belt therein, and the second connecting block is fixedly connected to the slide plate.

[0029] When the first servo motor is working, the first pulley drives the first conveyor belt to work, and the first conveyor belt drives the push-pull unit of the loading device to slide back and forth along the first guide rail through the fixing device fixedly connected thereto.

[0030] The first sensing unit comprises:

[0031] The first photoelectric sensor, the second photoelectric sensor and the first sensing sheet, the first photoelectric sensor and the second photoelectric sensor are both used to detect the first sensing sheet, preferably, the first photoelectric sensor and the second photoelectric sensor are slot-type photoelectric sensors. The first photoelectric sensor and the second photoelectric sensor are fixed on the first frame, and the first sensing sheet is fixed on the slide plate and can move forward and backward with the slide plate.

[0032] In the initial state, the push-pull unit of the material carrier is parked in the middle position of the transmission device, that is, the first sensing sheet is located at a certain position between the first photoelectric sensor and the second photoelectric sensor. When the material carrier carries the material tray to the front of the horizontal transmission unit, the system controls the horizontal transmission unit to start working, and the push-pull unit of the material carrier moves toward the material carrier under the action of the first transmission unit. When the first photoelectric sensor senses the first sensing sheet, the system controls the push-pull unit of the material carrier to stop moving, and the lifting cylinder is activated to make the hook claw clamped in the first operating hole / slot of the material carrier, and drive the material carrier to move forward together with the push-pull unit of the material carrier. When the push-pull unit of the loading device moves to the point where the second photoelectric sensor senses the first sensing sheet, the system controls the push-pull unit of the loading device to stop moving, and the lifting cylinder is activated to disengage the hook claw from the first operating hole / slot of the loading device. Subsequently, the push-pull unit of the loading device moves to the rear of the loading device, and the system controls the lifting cylinder to activate the push block to rise to the same level as the base of the loading device, and pushes the loading device forward through the push block, which acts on the reinforcement on the base.

[0033] In the present invention, by arranging hooks and push blocks capable of pushing and pulling the material carrier in the horizontal transmission unit, it is possible to realize step-by-step transportation of the material carrier, thereby greatly reducing the volume of the transmission device while ensuring that the material carrier has a sufficient stroke, saving space and floor space. It is understandable that the system can control the material carrier push-pull unit (203) to push and pull the material carrier (1) in two steps or multiple steps (at least three steps) according to the stroke requirements, which is not limited here.

[0034] The first frame is also provided with a plurality of bull's eye wheels, which are slidably matched with the base of the material loading device to reduce the friction force of the pushing and pulling unit of the material loading device pushing and pulling the material loading device.

[0035] The first frame is also provided with two limit devices, which are respectively located at two extreme positions of the movement track of the slider to prevent the push-pull unit of the loading device from sliding off the first guide rail.

[0036] A first drag chain is also provided on the first frame. The moving end of the first drag chain is fixed to the slide plate through a first drag chain connector and can perform reciprocating linear motion together with the push-pull unit of the loading device. The first drag chain is used to protect equipment wires, cylinder pipes, etc. from being entangled and damaged during multiple movements.

[0037] The first frame is also provided with a proximity switch and a blocking cylinder. The proximity switch is used to detect whether the material loading device is in place, and the system controls the blocking cylinder to block and release the material loading device by extending and retracting.

[0038] The transmission device further includes a vertical transmission unit, and the vertical transmission unit is arranged right in front of the horizontal transmission unit.

[0039] The vertical transmission unit includes two lifting units arranged relatively in parallel, and the lifting unit includes a lifting cylinder and a lifting cylinder mounting plate. The output end of the lifting cylinder is fixedly connected to the carrying mechanism of the loading device. Preferably, in order to facilitate processing, the carrying mechanism of the loading device is composed of multiple carrying plates. In other embodiments, the carrying mechanism of the loading device can also be an integrated structure.

[0040] A plurality of guide rods are arranged on the lifting cylinder mounting plate, and the carrying mechanism of the loading device can move up and down along the guide rods under the action of the lifting cylinder.

[0041] A plurality of bull's eye wheels are arranged on the carrying mechanism of the material loading device, and the plurality of bull's eye wheels are slidably matched with the base of the material loading device to reduce the friction force of the push-pull unit of the material loading device hooking and pulling the material loading device.

[0042] A check block is arranged at the entrance of the loading device on the loading mechanism of the loading device, and the check block can be pivotally mounted on the loading plate; a pressure plate is also arranged at the exit of the loading device on the loading mechanism of the loading device.

[0043] In the initial state, the bearing surface of the carrying mechanism of the loading device is on the same horizontal plane as the loading device, and the upper end blocking module of the check block is also in a horizontal position. The loading device is pushed into the vertical transmission unit. When the loading device completely enters the vertical transmission unit, the pressure plate limits the base of the loading device to prevent the loading device from tipping over during the lifting process and causing a production accident. The lifting cylinder drives the carrying mechanism of the loading device upward until the carrying mechanism of the loading device is on the same horizontal plane as the horizontal transmission unit. The system controls the horizontal transmission unit to start working, and the working process is as described above. In addition, during the upward movement of the carrying mechanism of the loading device, the check block flips under the action of gravity to prevent the loading device from sliding out.

[0044] The lifting unit can be fixed on the workshop floor or the equipment rack by any installation method known in the art, which will not be described in detail here.

[0045] The tray transmission system also includes a large and small tray identification device, which is arranged on one side of the transmission device and is used to identify the size of the tray and then transmit the identification result to the control system. The control system executes corresponding instructions according to the identification result.

[0046] The large and small tray identification device comprises a second frame, a second transmission unit and a second sensing unit. The second frame can adopt any known structure in the art, and only the specific structure and working principle of the second transmission unit and the second sensing unit are described below.

[0047] The second transmission unit comprises:

[0048] A second servo motor is mounted on the second frame, wherein the output end of the second servo motor is provided with a second pulley and a second conveyor belt, wherein the second pulley is preferably a gear, and the second conveyor belt is preferably inner-belted with teeth, and the second conveyor belt with teeth can mesh with the tooth grooves on the second pulley to improve the stability of power transmission;

[0049] a second guide rail mounted on the second frame, the moving plate being slidably mounted on the second guide rail, preferably, the moving plate being mounted on the second guide rail via a sliding block fixed thereunder;

[0050] The moving plate is connected to the second conveyor belt via a fixing device. Preferably, the fixing device comprises a third connecting block and a fourth connecting block fixedly connected to each other, the third connecting block and the fourth connecting block engage the second conveyor belt therein, and the third connecting block is fixedly connected to the moving plate.

[0051] When the second servo motor is working, the second pulley drives the second conveyor belt to work, and the second transmission belt drives the moving plate to slide back and forth along the second guide rail through a fixing device fixed thereto, and two limit blocks are also provided on the second frame, and the two limit blocks are respectively located at the two extreme positions of the movement trajectory of the sliding block.

[0052] The second sensing unit includes: a third photoelectric sensor, a fourth photoelectric sensor and a second sensing sheet. The third photoelectric sensor and the fourth photoelectric sensor are used to detect the second sensing sheet. Preferably, the third photoelectric sensor and the fourth photoelectric sensor are slot-type photoelectric sensors.

[0053] Preferably, the third photoelectric sensor and the fourth photoelectric sensor are fixed on the second frame, and the second sensing sheet is fixed on the moving board and can move forward and backward with the moving board. It can be understood that, due to the relative movement between the third photoelectric sensor, the fourth photoelectric sensor and the second sensing sheet, in other embodiments, the second sensing sheet can also be fixed on the second frame, and the third photoelectric sensor and the fourth photoelectric sensor can be fixed on the moving board and can move forward and backward with the moving board, and the purpose of the present invention can be achieved.

[0054] The moving plate is also provided with a sensing plate, on which a plurality of guide pillars are fixed, the other ends of the plurality of guide pillars are movably inserted into a sensing plate mounting plate, and reset springs are partially or completely sleeved on the plurality of guide pillars. The sensing plate mounting plate is fixed to the moving plate, on which a plurality of proximity switches are also provided, and one end of the proximity switch is arranged opposite to the sensing plate.

[0055] In the initial state, the second sensing sheet is located in the sensing slot of the third photoelectric sensor, and there is a first distance between the end of the proximity switch close to the sensing plate and the sensing plate. Preferably, the first distance is set to 15 mm. When the loading device carries the tray to the front of the large and small tray identification device, the system controls the large and small tray identification device to start working, and the sensing plate moves toward the tray in the loading device under the action of the second transmission unit. If the sensing plate is blocked after touching the tray, the reset spring is compressed, and the distance between the sensing plate and the proximity switch is reduced to the second distance, the proximity switch is triggered, and the system controls the second transmission unit to stop and reset, and at the same time judges that the tray is a large tray. Preferably, the second distance is set to 10 mm; if the sensing plate is not blocked during the forward movement, the fourth photoelectric sensor senses the second sensing sheet, and then judges that the tray is a small tray.

[0056] In the present invention, the large material tray is a material tray not less than 8 inches, such as 8 inches, 11 inches, 13 inches or 15 inches, etc., and the small material tray is a material tray less than 8 inches, such as 7 inches, etc. It can be understood that those skilled in the art can define the large and small material trays according to actual production needs, and comprehensively set the first distance, the second distance, the distance between the third photoelectric sensor and the fourth photoelectric sensor, and the distance from the sensing plate to the material tray in the initial state.

[0057] In order to protect the proximity switch from being hit by the sensing plate in an unexpected state, a plurality of limiting bolts are further provided on the sensing plate mounting plate.

[0058] The second frame is also provided with a second drag chain, the moving end of which is fixed to the moving plate via a second drag chain connector and can perform reciprocating linear motion with the moving plate. The second drag chain is used to protect equipment wires from being entangled and damaged during multiple movements.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] 1. In the material loading device of the present invention, the top of the guide rod is provided with a visually identifiable structure. When a plurality of material trays need to be placed on the tray by a mechanical arm through the guide rod, the visual recognition device on the mechanical arm will instruct the mechanical arm to accurately place the material tray by identifying the center hole of the material tray and the top structure of the guide rod, ensuring that the center hole of the material tray passes through the guide rod. And through the guide rod fixing structure of the present invention, the guide rod can be firmly clamped on the base. During the loading and unloading process of the material tray, the guide rod will not tilt or loosen. Therefore, during the unloading process, the visual recognition device only needs to be used to identify the top structure of the guide rod once, which greatly improves the placement efficiency of the material tray.

[0061] 2. The transmission device of the present invention includes a horizontal transmission unit. By arranging hook claws and push blocks capable of pushing and pulling the loading device in the horizontal transmission unit, the loading device can be transported in stages. While ensuring that the loading device has sufficient travel, the volume of the transmission device is greatly reduced, saving space and floor space.

[0062] 3. In a preferred embodiment of the present invention, a vertical transmission unit is provided to cooperate with the horizontal transmission unit, so as to further improve the degree of automation of the conveying of the loading device.

[0063] 4. The present invention also provides a large and small tray identification device on one side of the transmission device for identifying the size of the tray, and then transmitting the identification result to the control system. The control system executes corresponding instructions according to the identification result, and can be applicable to a material counting machine with two production modes of large and small trays. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0065] Figure 1 It is a schematic diagram of the structural decomposition of the tray transmission system in the embodiment;

[0066] Figure 2 It is a structural schematic diagram of the material loading device in the embodiment;

[0067] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0068] Figure 4 This is a schematic diagram of the first perspective structure decomposition of the loading device in the embodiment;

[0069] Figure 5 A schematic diagram of the structure decomposition of the material loading device in the embodiment from a second viewing angle;

[0070] Figure 6 It is a partial structural cross-sectional view of the material loading device in the embodiment;

[0071] Figure 7 It is a structural schematic diagram of the base in the embodiment;

[0072] Figure 8 2 is a schematic diagram of the first viewing angle structure of the horizontal transmission unit in the embodiment;

[0073] Fig. 9 is a schematic diagram of the second viewing angle structure of the horizontal transmission unit in the embodiment;

[0074] Fig.10 This is a schematic diagram of the structure of the push-pull unit of the loading device in the embodiment from a first viewing angle;

[0075] Fig.11 It is a schematic structural diagram of the push-pull unit of the loading device in the embodiment from a second viewing angle;

[0076] Fig.12 It is a structural schematic diagram of a vertical transmission unit in an embodiment;

[0077] Fig.13 It is a structural schematic diagram of the carrying mechanism of the material carrying device in the embodiment;

[0078] Fig.14 This is a schematic diagram of the structure of the large and small tray identification device from a first perspective in the embodiment;

[0079] Fig.15 It is a schematic diagram of the structure of the large and small tray identification device from a second perspective in the embodiment;

[0080] Fig.16 It is a third perspective structural schematic diagram of the large and small tray identification device in the embodiment.

[0081] Reference numerals: 1. Loading device, 101. Base, 1011. Reinforcement member, 1012. First operating hole / slot, 1013. Second operating hole / slot, 1014. Positioning hole, 102. Guide rod, 1021. Round hole, 1023. First positioning block, 1024. Second positioning block, 1025. Accommodating cavity, 103. Tray, 1031. Buffer block, 104. Push-pull handle, 105. Guide wheel, 2. Horizontal transmission unit, 201. First frame, 2021. First servo Servo motor, 2022. First pulley, 2023. First conveyor belt, 203. Loading device push-pull unit, 2031. Claw, 2032, 2034. Lifting cylinder, 2033. Push block, 2035. Slider, 2036. Slide plate, 2037. First connecting block, 2038. Second connecting block, 204. First guide rail, 2041. Limiting device, 205, 308. Bull's eye wheel, 206. First drag chain, 2061-First drag chain connector, 2071-First photoelectric Sensor, 2072-second photoelectric sensor, 2073-first induction sheet, 208-proximity switch, 209-blocking cylinder, 3-vertical transmission unit, 301-lifting cylinder, 302-lifting cylinder mounting plate, 303, 305, 306-carrying plate, 304-guide rod, 307-check block, 309-pressing plate, 4-large and small tray identification device, 401-second frame, 4021-second servo motor, 4022-second pulley, 4023-second conveyor belt, 4 024-second guide rail, 4025-sliding block, 4026-moving plate, 4027-third connecting block, 4028-fourth connecting block, 4029-limiting block, 403-second drag chain, 4031-second drag chain connecting piece, 4041-third photoelectric sensor, 4042-fourth photoelectric sensor, 4043-second induction sheet, 4051-proximity switch, 4052-induction plate mounting plate, 4053-induction plate, 4054-guide column, 4055-limiting bolt mounting hole. DETAILED DESCRIPTION

[0082] The technical solutions in the specific embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0083] like Figure 1 As shown, a tray transmission system comprises:

[0084] A loading device (1), used for loading a material tray (not shown in the figure);

[0085] and a transmission device, used for transmitting the material loading device (1).

[0086] like Figure 2 As shown, the loading device (1) comprises:

[0087] A base (101), wherein a plurality of guide wheels (105) are provided on the base (101);

[0088] A guide rod (102), the guide rod (102) being fixedly mounted on the base (101); in the present embodiment, the guide rod (102) is an integrated structure; in other embodiments, the guide rod may also be a segmented assembly structure;

[0089] The tray (103) is used to carry the material tray; the tray (103) is inserted into the guide rod (102) and can slide up and down along the guide rod (102).

[0090] Figure 3 for Figure 2 In the enlarged view of the middle A, as shown in the figure, the top of the guide rod (102) is provided with a circular hole (1021). When a plurality of trays need to be passed through the guide rod (102) and stacked on the tray (103) by a robotic arm, a visual recognition device (not shown in the figure), preferably a camera recognition device, on the robotic arm will instruct the robotic arm to accurately place the tray by recognizing the center hole of the tray and the circular hole (1021) on the top of the guide rod (102), thereby ensuring that the center hole of the tray passes through the guide rod (102).

[0091] The guide rod (102) is fixedly mounted on the base (101) via a guide rod fixing structure. Figure 4-6 As shown, the guide rod fixing structure includes a first positioning block (1023), a second positioning block (1024) and a plurality of screws (not shown in the figure), and the first positioning block (1023) is engaged with the end of the guide rod (102) through the U-shaped groove thereon, thereby locking the guide rod (102) in the circumferential direction. The second positioning block (1024) is provided with a receiving cavity (1025) adapted to the shape of the first positioning block (1023). When the guide rod fixing structure is assembled, the first positioning block (1023) is clamped in the receiving cavity (1025), and the end of the guide rod (102) and the second positioning block (1024) are respectively fixedly connected to the base (101) through the plurality of screws, so as to further lock the guide rod (102).

[0092] Usually, in order to improve the loading and unloading efficiency of the material tray, a considerable number of material trays need to be stacked on the slender guide rod. Excessive load can easily cause the guide rod to tilt or loosen. However, through the guide rod fixing structure described in the present invention, the guide rod (102) can be firmly clamped on the base (101), and during the loading and unloading process of the material tray, the guide rod (102) will not tilt or loosen. Therefore, during the unloading process, it is only necessary to use the visual recognition device to identify the circular hole (1021) once, which greatly improves the placement efficiency of the material tray.

[0093] A buffer block (1031) is connected to the bottom of the tray (103) via screws, thereby preventing the tray (103) from being damaged due to accidental falling.

[0094] The base (101) is made of aluminum alloy, which can reduce the weight of the device and save transmission energy while ensuring its mechanical strength. In addition, in order to increase the service life of the base (101), a plurality of stainless steel reinforcements (1011) are provided at the stress-bearing parts thereof.

[0095] like Figure 7 As shown, the base (101) further comprises a plurality of first operating holes / grooves (1012) and second operating holes / grooves (1013); the hook claw (2031) on the loading device push-pull unit (203) can hook and pull the loading device (1) through the first operating holes / grooves (1012); when the loading device (1) is located at the upper material position, the material tray lifting mechanism (not shown in the figure) at the upper material position can lift the tray (103) through the second operating holes / grooves (1013), thereby lifting the trays stacked on the tray (103).

[0096] In order to keep the loading device (1) stable at the loading position, a plurality of positioning holes (1014) are provided on the base (101), and the plurality of positioning holes (1014) cooperate with a positioning mechanism (not shown in the figure) in the material tray lifting mechanism to prevent the loading device (1) from shaking or tipping over during the lifting process, thereby endangering production safety.

[0097] Furthermore, in order to facilitate manual movement of the material loading device (1) when necessary, the material loading device further comprises a push-pull handle (104). The push-pull handle (104) may adopt any known structure in the art and will not be described in detail herein.

[0098] The transmission device comprises a horizontal transmission unit (2), such as Figure 8As shown, the horizontal transmission unit (2) comprises a first frame (201), a first transmission unit, a first sensing unit and a material carrier push-pull unit (203). The first frame (201) may adopt any known structure in the art, and only the specific structure and working principle of the first transmission unit, the first sensing unit and the material carrier push-pull unit (203) are described below.

[0099] like Figure 9-11 As shown, the first transmission unit includes:

[0100] A first servo motor (2021) is mounted on the first frame (201); the output end of the first servo motor (2021) is provided with a first pulley (2022) and a first conveyor belt (2023); the first pulley (2022) is a gear; the inner side of the first conveyor belt (2023) is provided with teeth; the first conveyor belt (2023) with teeth can mesh with the tooth grooves on the first pulley (2022) to improve the stability of power transmission;

[0101] A first guide rail (204) is mounted on the first frame (201), and the material loading device push-pull unit (203) is slidably mounted on the first guide rail (204).

[0102] The material loading device push-pull unit (203) comprises a mounting frame, the mounting frame is mounted on a slide plate (2036), and the slide plate (2036) is mounted on the first guide rail (204) via a slider (2035) fixed thereunder; a hook claw (2031) and a push block (2033) are arranged on the mounting frame along the extension direction of the first guide rail (204), and lifting cylinders (2032, 2034) are arranged below the hook claw (2031) and the push block (2033); the lifting cylinders (2032, 2034) are fixedly mounted on the mounting frame.

[0103] The material loading device push-pull unit (203) is connected to the first conveyor belt (2023) via a fixing device (2037, 2038); the fixing device (2037, 2038) comprises a first connecting block (2037) and a second connecting block (2038) which are fixedly connected to each other; the first connecting block (2037) and the second connecting block (2038) engage the first conveyor belt (2023) therein, and the second connecting block (2038) is fixedly connected to the slide plate (2036).

[0104] When the first servo motor (2021) is working, the first pulley (2022) drives the first conveyor belt (2023) to work, and the first conveyor belt (2023) drives the loading device push-pull unit (203) to slide forward and backward along the first guide rail (204) via the fixing device (2037, 2038) fixedly connected thereto.

[0105] like Fig.10 As shown, the first sensing unit includes:

[0106] A first photoelectric sensor (2071), a second photoelectric sensor (2072) and a first sensing sheet (2073), wherein the first photoelectric sensor (2071) and the second photoelectric sensor (2072) are both used to detect the first sensing sheet (2073), and the first photoelectric sensor (2071) and the second photoelectric sensor (2072) are slot-type photoelectric sensors. The first photoelectric sensor (2071) and the second photoelectric sensor (2072) are fixed on the first frame (201), and the first sensing sheet (2073) is fixed on the slide plate (2036) and can move forward and backward with the slide plate (2036).

[0107] In the initial state, the material loading device push-pull unit (203) is parked in the middle position of the transmission device, that is, the first sensing sheet (2073) is located at a certain position between the first photoelectric sensor (2071) and the second photoelectric sensor (2072). When the material loading device (1) carries the material tray to the front of the horizontal transmission unit (2), the system controls the horizontal transmission unit (2) to start working, and the material loading device push-pull unit (203) moves toward the material loading device (1) under the action of the first transmission unit. When the first photoelectric sensor (2071) senses the first sensing sheet (2073), the system controls the material loading device push-pull unit (203) to stop moving, and the lifting cylinder (2032) is activated to make the hook (2031) clamped in the first operating hole / slot (1012) of the material loading device (1), and drive the material loading device (1) to move forward together with the material loading device push-pull unit (203). When the push-pull unit (203) of the loading device moves to the point where the second photoelectric sensor (2072) senses the first sensing sheet (2073), the system controls the push-pull unit (203) of the loading device to stop moving, and the lifting cylinder (2032) is activated to cause the hook (2031) to disengage from the first operating hole / slot (1012) of the loading device (1). Subsequently, the push-pull unit (203) of the loading device moves to the rear of the loading device (1), and the system controls the lifting cylinder (2034) to activate to cause the push block (2033) to rise to the same level as the base (101) of the loading device (1), and the pushing block (2033) is used to push the loading device (1) to continue moving forward, and the pushing block (2033) acts on the reinforcing member (1011) on the base (101).

[0108] In this embodiment, the material loading device push-pull unit (203) pushes and pulls the material loading device (1) in two steps, while in other specific embodiments, the system can also control the material loading device push-pull unit (203) to push and pull the material loading device (1) in multiple steps (at least three steps) according to the travel requirements.

[0109] In the present invention, by arranging a hook claw (2031) and a push block (2033) capable of pushing and pulling the material loading device (1) in the horizontal transmission unit (2), it is possible to realize step-by-step transportation of the material loading device (1), thereby greatly reducing the volume of the transmission device while ensuring that the material loading device (1) has a sufficient travel distance, thereby saving space and floor space.

[0110] A plurality of bull's eye wheels (205) are also provided on the first frame (201), and the plurality of bull's eye wheels (205) are slidably matched with the base (101) of the loading device (1) to reduce the friction force of the loading device push-pull unit (203) in pushing and pulling the loading device (1).

[0111] The first frame (201) is also provided with two limit devices (2041), and the two limit devices (2041) are respectively located at two extreme positions of the movement trajectory of the slider (2035) to prevent the push-pull unit (203) of the loading device from sliding off the first guide rail (204).

[0112] The first frame (201) is also provided with a first drag chain (206), the moving end of the first drag chain (206) is fixed to the slide plate (2036) via a first drag chain connector (2061), and can perform reciprocating linear motion together with the loading device push-pull unit (203), and the first drag chain (206) is used to protect the equipment wires, cylinder pipes, etc. from being entangled with each other and damaged during multiple movements.

[0113] The first frame (201) is also provided with a proximity switch (208) and a blocking cylinder (209); the proximity switch (208) is used to detect whether the material loading device (1) is in place, and the system controls the blocking cylinder (209) to block and release the material loading device (1) by extending and retracting.

[0114] In this embodiment, the transmission device further comprises a vertical transmission unit (3), and the vertical transmission unit (3) is arranged directly in front of the horizontal transmission unit (2).

[0115] like Fig.12 As shown, the vertical transmission unit (3) includes two lifting units arranged relatively in parallel, and the lifting unit includes a lifting cylinder (301) and a lifting cylinder mounting plate (302). The output end of the lifting cylinder (301) is fixedly connected to the carrying mechanism of the loading device. In this embodiment, in order to facilitate processing, the carrying mechanism of the loading device is spliced ​​by multiple carrying plates (303, 305, 306). In other embodiments, the carrying mechanism of the loading device can also be an integrated structure.

[0116] A plurality of guide rods (304) are arranged on the lifting cylinder mounting plate (302), and the material loading device bearing mechanism can move up and down along the guide rods (304) under the action of the lifting cylinder (301).

[0117] like Fig.13As shown, a plurality of bull's eye wheels (308) are arranged on the carrying mechanism of the material loading device, and the plurality of bull's eye wheels (308) are slidably matched with the base (101) of the material loading device (1) to reduce the friction force of the push-pull unit (203) of the material loading device hooking and pulling the material loading device (1).

[0118] A check block (307) is provided at the entrance of the loading device on the loading device bearing mechanism, and the check block (307) is pivotally mounted on the bearing plate (306); a pressure plate (309) is also provided at the exit of the loading device on the loading device bearing mechanism.

[0119] In the initial state, the bearing surface of the carrying mechanism of the loading device is on the same horizontal plane as the loading device (1), and the upper blocking module of the check block (307) is also in a horizontal position (not shown in the figure). The loading device (1) is pushed into the vertical transmission unit (3) along the X direction shown in the figure. When the loading device (1) completely enters the vertical transmission unit (3), the pressure plate (309) limits the base (101) of the loading device (1) to prevent the loading device (1) from tipping over during the lifting process and causing a production accident. The lifting cylinder (301) drives the loading device carrying mechanism upward until the loading device carrying mechanism and the horizontal transmission unit (2) are on the same horizontal plane. The system controls the horizontal transmission unit (2) to start working, and the working process is as described above. In addition, during the upward movement of the loading device carrying mechanism, the check block (307) flips under the action of gravity to keep Fig.13 The state shown serves to prevent the loading device (1) from sliding out.

[0120] The lifting unit can be fixed on the workshop floor or the equipment rack by any installation method known in the art, which will not be described in detail here.

[0121] like Figure 1 As shown, the tray transmission system in this embodiment also includes a large and small tray identification device (4), which is arranged on one side of the transmission device and is used to identify the size of the tray, and then transmit the identification result to the control system, and the control system executes corresponding instructions according to the identification result.

[0122] like Figure 14-15 As shown, the large and small tray identification device (4) comprises a second frame (401), a second transmission unit and a second sensing unit. The second frame (401) can adopt any known structure in the art, and only the specific structure and working principle of the second transmission unit and the second sensing unit are described below.

[0123] The second transmission unit comprises:

[0124] a second servo motor (4021) mounted on the second frame (401); the output end of the second servo motor (4021) is provided with a second pulley (4022) and a second conveyor belt (4023); the second pulley (4022) is a gear; the inner side of the second conveyor belt (4023) is provided with teeth; the second conveyor belt (4023) with teeth can mesh with the tooth grooves on the second pulley (4022) to improve the stability of power transmission;

[0125] A second guide rail (4024) mounted on the second frame (401), a moving plate (4026) being slidably mounted on the second guide rail (4024), and the moving plate (4026) being mounted on the second guide rail (4024) via a sliding block (4025) fixed thereunder;

[0126] The moving plate (4026) is connected to the second conveyor belt (4023) via a fixing device (4027, 4028), the fixing device (4027, 4028) comprising a third connecting block (4027) and a fourth connecting block (4028) fixedly connected to each other, the third connecting block (4027) and the fourth connecting block (4028) clamping the second conveyor belt (4023) therein, and the third connecting block (4027) is fixedly connected to the moving plate (4026).

[0127] When the second servo motor (4021) is working, the second pulley (4022) drives the second conveyor belt (4023) to work, and the second conveyor belt (4023) drives the moving plate (4026) to slide forward and backward along the second guide rail (4024) through the fixing device (4027, 4028) fixedly connected thereto. Two limit blocks (4029) are also provided on the second frame (401), and the two limit blocks (4029) are respectively located at two extreme positions of the motion track of the sliding block (4025).

[0128] like Fig.15 As shown, the second sensing unit includes: a third photoelectric sensor (4041), a fourth photoelectric sensor (4042) and a second sensing sheet (4043), wherein the third photoelectric sensor (4041) and the fourth photoelectric sensor (4042) are used to detect the second sensing sheet (4043), and the third photoelectric sensor (4041) and the fourth photoelectric sensor (4042) are slot-type photoelectric sensors.

[0129] In this embodiment, the third photoelectric sensor (4041) and the fourth photoelectric sensor (4042) are fixed on the second frame (401), and the second sensing sheet (4043) is fixed on the moving plate (4026) and can move forward and backward with the moving plate (4026). It can be understood that due to the relative movement between the third photoelectric sensor (4041), the fourth photoelectric sensor (4042) and the second sensing sheet (4043), therefore, in other embodiments, the second sensing sheet (4043) can also be fixed on the second frame (401), and the third photoelectric sensor (4041) and the fourth photoelectric sensor (4042) can be fixed on the moving plate (4026) and can move forward and backward with the moving plate (4026), and both can achieve the purpose of the present invention.

[0130] The moving plate (4026) is also provided with a sensing plate (4053), and a plurality of guide pillars (4054) are fixed on the sensing plate (4053). The other ends of the plurality of guide pillars (4054) are movably inserted into the sensing plate mounting plate (4052), and a return spring (not shown in the figure) is partially or completely sleeved on the plurality of guide pillars (4054). The sensing plate mounting plate (4052) is fixed on the moving plate (4026), and a plurality of proximity switches (4051) are also provided thereon, and one end of the proximity switch (4051) is arranged opposite to the sensing plate (4053).

[0131] In the initial state, the second sensing sheet (4043) is located in the sensing slot of the third photoelectric sensor (4041), and a first distance exists between the end of the proximity switch (4051) close to the sensing plate (4053) and the sensing plate (4053). In this embodiment, the first distance is set to 15 mm. When the loading device (1) carries the material tray to the front of the large and small material tray identification device (4), the system controls the large and small material tray identification device (4) to start working, and the sensing plate (4053) moves toward the material tray in the loading device (1) under the action of the second transmission unit. If the sensing plate (4053) is obstructed after touching the material tray, the reset spring is compressed, and the distance between the sensing plate (4053) and the proximity switch (4051) is reduced to a second distance, triggering the proximity switch (4051), and the system controls the second transmission unit to stop and reset, and at the same time determines that the material tray is a large material tray. In this embodiment, the second distance is set to 10 mm; if the sensing plate (4053) is not obstructed in the process of moving forward, the fourth photoelectric sensor (4042) senses the second sensing sheet (4043), and the material tray is determined to be a small material tray.

[0132] In the present embodiment, the large material tray is a material tray not less than 8 inches, such as 8 inches, 11 inches, 13 inches or 15 inches, etc., and the small material tray is a material tray less than 8 inches, such as 7 inches, etc. It can be understood that in other embodiments, those skilled in the art can define the large and small material trays according to actual production needs, and comprehensively set the first distance, the second distance, the distance between the third photoelectric sensor (4041) and the fourth photoelectric sensor (4042), and the distance from the sensor plate (4053) to the material tray in the initial state.

[0133] In order to protect the proximity switch (4051) from being hit by the sensing plate (4053) in an unexpected state, a plurality of limit bolts are further provided on the sensing plate mounting plate (4052) (the limit bolts are not shown in the figure, only the limit bolt mounting holes 4055 are shown).

[0134] The second frame (401) is also provided with a second drag chain (403), the moving end of the second drag chain (403) is fixed to the moving plate (4026) via a second drag chain connector (4031), and can perform reciprocating linear motion together with the moving plate (4026), and the second drag chain (403) is used to protect the equipment wires and the like from being entangled and damaged during multiple movements.

[0135] The above is a detailed introduction to the material tray transmission system provided by the present invention. The structure and working principle of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tray transmission system, comprising: A loading device, used for loading the tray; and a transmission device for transmitting the material-carrying device; The transmission device comprises a horizontal transmission unit, and the horizontal transmission unit comprises a first frame, a first transmission unit, a first sensing unit and a material loading device push-pull unit; The first transmission unit comprises: A first servo motor mounted on the first frame, wherein an output end of the first servo motor is provided with a first pulley and a first conveyor belt; A first guide rail mounted on the first frame, the push-pull unit of the loading device being slidably mounted on the first guide rail; The push-pull unit of the loading device includes a mounting frame, the mounting frame is mounted on a slide plate, and the slide plate is mounted on the first guide rail through a slider fixed thereunder; a hook claw and a push block are arranged on the mounting frame along the extension direction of the first guide rail, and a lifting cylinder is arranged below the hook claw and the push block, and the lifting cylinder is fixedly mounted on the mounting frame; The push-pull unit of the loading device is connected to the first conveyor belt through a fixing device, and the fixing device includes a first connecting block and a second connecting block fixedly connected to each other, the first connecting block and the second connecting block clamp the first conveyor belt therein, and the second connecting block is fixedly connected to the slide plate.

2. The tray transmission system according to claim 1, characterized in that: The loading device comprises: A base, wherein a plurality of guide devices are arranged on the base, and the plurality of guide devices include at least one of a guide wheel, a guide rail, and a guide groove; A guide rod, the guide rod is fixedly mounted on the base, and the guide rod is an integrated structure or a segmented assembly structure; The tray is used to carry the material tray. The tray is passed through the guide rod and can slide up and down along the guide rod.

3. The tray transmission system according to claim 2, characterized in that: A visually identifiable structure is disposed at the top end of the guide rod, and the visually identifiable structure includes at least one of a hole, a groove, a protrusion, and an insert.

4. The tray transmission system according to claim 2, characterized in that: The guide rod is fixedly mounted on the base through a guide rod fixing structure, and the guide rod fixing structure includes a first positioning block, a second positioning block and a plurality of screws, and the first positioning block is engaged with the end of the guide rod through a U-shaped groove thereon.

5. The tray transmission system according to claim 4, characterized in that: The second positioning block is provided with a receiving cavity adapted to the shape of the first positioning block. When the guide rod fixing structure is assembled, the first positioning block is clamped in the receiving cavity, and the end of the guide rod and the second positioning block are fixedly connected to the base through the plurality of screws.

6. The tray transmission system according to any one of claims 2 to 5, characterized in that: A buffer block is connected under the tray via screws.

7. The tray transmission system according to any one of claims 2 to 5, characterized in that: The base is made of light material, and a plurality of hard material reinforcement pieces are arranged at the stress-bearing parts thereof.

8. The tray transmission system according to any one of claims 2 to 5, characterized in that: The base also includes a plurality of first operating holes / grooves, second operating holes / grooves, and positioning holes.

9. The tray transmission system according to claim 1, characterized in that: The first pulley is a gear, the inner side of the first conveyor belt is provided with teeth, and the first conveyor belt with teeth can mesh with the tooth grooves on the first pulley.

10. The tray transmission system according to claim 1, characterized in that: The first frame is also provided with two limit devices, and the two limit devices are respectively located at two extreme positions of the movement track of the slider.

11. The tray transmission system according to claim 1, characterized in that: The first sensing unit includes: a first photoelectric sensor, a second photoelectric sensor and a first sensing sheet. The first photoelectric sensor and the second photoelectric sensor are both used to detect the first sensing sheet. The first photoelectric sensor and the second photoelectric sensor are slot-type photoelectric sensors.

12. The tray transmission system according to claim 11, characterized in that: The first photoelectric sensor and the second photoelectric sensor are fixed on the first frame, and the first sensing sheet is fixed on the slide plate and can move forward and backward with the slide plate.

13. The tray transmission system according to any one of claims 9 to 12, characterized in that: The first frame is also provided with a plurality of bull's eye wheels, and the plurality of bull's eye wheels are slidably matched with the base of the loading device.

14. The tray transmission system according to any one of claims 9 to 12, characterized in that: The first frame is also provided with a first drag chain, the moving end of which is fixed to the slide plate via a first drag chain connector and can perform reciprocating linear motion together with the push-pull unit of the loading device.

15. The tray transmission system according to claim 1, characterized in that: The transmission device further includes a vertical transmission unit, and the vertical transmission unit is arranged right in front of the horizontal transmission unit.

16. The tray transmission system according to claim 15, characterized in that: The vertical transmission unit comprises two lifting units arranged relatively in parallel, the lifting unit comprises a lifting cylinder and a lifting cylinder mounting plate, and the output end of the lifting cylinder is fixedly connected to the carrying mechanism of the loading device.

17. The tray transmission system according to claim 16, characterized in that: A plurality of guide rods are arranged on the lifting cylinder mounting plate, and the carrying mechanism of the loading device can move up and down along the guide rods under the action of the lifting cylinder.

18. The tray transmission system according to claim 16 or 17, characterized in that: A plurality of bull's eye wheels are arranged on the carrying mechanism of the material loading device, and the plurality of bull's eye wheels are slidably matched with the base of the material loading device.

19. The tray transmission system according to claim 16 or 17, characterized in that: A check block is arranged at the entrance of the material loading device on the material loading device bearing mechanism, and the check block can be pivotally mounted on the bearing plate; a pressure plate is also arranged at the exit of the material loading device on the material loading device bearing mechanism.

20. The tray transmission system according to claim 1, characterized in that: The tray transmission system also includes a large and small tray identification device, which is arranged on one side of the transmission device and is used to identify the size of the tray.

21. The tray transmission system according to claim 20, characterized in that: The large and small tray identification device includes a second frame, a second transmission unit and a second sensing unit.

22. The tray transmission system according to claim 21, characterized in that: The second transmission unit comprises: A second servo motor mounted on the second frame, wherein an output end of the second servo motor is provided with a second pulley and a second conveyor belt; A second guide rail mounted on the second frame, the moving plate being slidably mounted on the second guide rail; The moving plate is connected to the second conveyor belt via a fixing device, which includes a third connecting block and a fourth connecting block fixedly connected to each other, wherein the third connecting block and the fourth connecting block engage the second conveyor belt therein, and the third connecting block is fixedly connected to the moving plate.

23. The tray transmission system according to claim 22, characterized in that: The moving plate is also provided with a sensing plate, on which a plurality of guide pillars are fixed, the other ends of the plurality of guide pillars are movably inserted into a sensing plate mounting plate, and reset springs are partially or completely sleeved on the plurality of guide pillars. The sensing plate mounting plate is fixed to the moving plate, on which a plurality of proximity switches are also provided, and one end of the proximity switch is arranged opposite to the sensing plate.

24. The tray transmission system according to claim 23, characterized in that: The induction plate mounting plate is also provided with a plurality of limiting bolts.

25. The tray transmission system according to claim 22, characterized in that: The second pulley is a gear, the inner side of the second conveyor belt is toothed, the toothed second conveyor belt can mesh with the tooth grooves on the second pulley, and the moving plate is installed on the second guide rail through a sliding block fixed thereunder.

26. The tray transmission system according to claim 22, characterized in that: The second sensing unit includes: a third photoelectric sensor, a fourth photoelectric sensor and a second sensing sheet. The third photoelectric sensor and the fourth photoelectric sensor are used to detect the second sensing sheet. The third photoelectric sensor and the fourth photoelectric sensor are slot-type photoelectric sensors.

27. The tray transmission system according to claim 26, characterized in that: The third photoelectric sensor and the fourth photoelectric sensor are fixed on the second frame, and the second sensing sheet is fixed on the moving plate and can move forward and backward with the moving plate.

28. The tray transmission system according to any one of claims 22 to 27, characterized in that: The second frame is also provided with a second drag chain, and the moving end of the second drag chain is fixed to the moving plate through a second drag chain connector and can perform reciprocating linear motion together with the moving plate.

Images