A bilateral transmission device

Abstract

The present invention provides a double-sided transmission device, which relates to the field of transmission mechanisms. The double-sided transmission device includes a base plate, a first transmission mechanism and a second transmission mechanism, and a first distance adjustment mechanism and a second distance adjustment mechanism. The first transmission mechanism is fixedly installed on the base plate, and the second transmission mechanism is transmission-connected with the first distance adjustment mechanism and the second distance adjustment mechanism; the first distance adjustment mechanism and the second distance adjustment mechanism both include a driving structure, a sliding structure and two distance adjustment guide rails, the two distance adjustment guide rails extend perpendicularly to the transmission direction, the sliding structures are respectively guided and matched with the two distance adjustment guide rails, and the sliding structures of the first distance adjustment mechanism and the second distance adjustment mechanism are respectively installed near the end position of the second transmission mechanism; the double-sided transmission device also includes a distance measuring module and a controller, the distance measuring module is used to detect the distance between the two transmission mechanisms, the controller receives the detection signal, and calculates the offset by comparing with the set distance, and controls the corresponding driving structure to work according to the offset.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying mechanisms, and particularly to a bilateral conveying device. Background Art

[0002] In industrial production, conveying mechanisms are commonly used for material transportation. For plate-shaped or sheet-shaped materials (hereinafter collectively referred to as "material plates"), such as LED boards in the LED lens mounting process, due to the large size of the material plates themselves, bilateral conveying devices are usually required for transportation.

[0003] As disclosed in the Chinese utility model patent with the authorization announcement number CN207346591U and the authorization announcement date of May 11, 2018, a transport track with adjustable width is disclosed, and specifically discloses that the transport track with adjustable width includes a first support plate and a second support plate arranged in parallel, a first conveyor belt arranged inside the first support plate, a second conveyor belt arranged inside the second support plate. The first support plate is installed on a transverse moving block, a lead screw nut is provided on the transverse moving block, the lead screw nut is engaged with a lead screw, a guide sleeve is provided on the transverse moving block, the guide sleeve is engaged with a guide rod, the lead screw is parallel to the guide rod, and the lead screw is connected to a first motor. The first motor drives the lead screw, and under the guidance of the guide rod, the lead screw drives the lead screw nut to move horizontally. The lead screw nut drives the transverse moving block and the first support plate thereon to move horizontally, and the first support plate approaches or moves away from the second support plate. Thus, the distance between the first support plate and the second support plate is adjustable to adapt to products of different sizes.

[0004] The transport track in the prior art uses a lead screw nut mechanism to adjust the width between the two conveyor belts. Since the conveying distance of the conveying mechanism is generally far. In actual work, the slight displacement of the two conveyor belts can cause the bilateral conveying device to form a flare, and then it cannot ensure the accurate and stable conveyance of the material plate.

[0005] In summary, when the flare occurs in the transport track in the prior art, it cannot be automatically corrected and leveled, and the problem of ensuring the conveying accuracy of the material plate. Summary of the Invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a bilateral conveying device to solve the problems that the existing transport track cannot be automatically corrected and leveled when the flare occurs, and to ensure the conveying accuracy of the material plate.

[0007] The technical solution of the bilateral conveying device of the present invention is as follows:

[0008] The double-sided conveying device comprises a bottom plate, a first conveying mechanism and a second conveying mechanism, and a first distance adjusting mechanism and a second distance adjusting mechanism installed on the bottom plate, wherein the first conveying mechanism and the second conveying mechanism are arranged in parallel and spaced apart, the first conveying mechanism is fixedly installed on the bottom plate, and the second conveying mechanism is transmission-connected with the first distance adjusting mechanism and the second distance adjusting mechanism;

[0009] The first distance adjusting mechanism and the second distance adjusting mechanism have the same structure, and both include a driving structure, a sliding structure, and two distance adjusting guide rails arranged in parallel and spaced apart, the two distance adjusting guide rails respectively extend perpendicular to the conveying direction, the sliding structures respectively cooperate with the two distance adjusting guide rails for guidance, the driving structure is connected to the sliding structure by transmission, and the sliding structure of the first distance adjusting mechanism and the sliding structure of the second distance adjusting mechanism are respectively installed near the end of the second conveying mechanism;

[0010] The bilateral transmission device also includes a distance measuring module and a controller. The distance measuring module is used to detect the distance between the first transmission mechanism and the second transmission mechanism. The controller is electrically connected to the detection module and the driving structure respectively; the controller is used to receive the detection signal of the detection module, and compare the detected distance with the set distance to calculate the offset, and control the corresponding driving structure to work according to the offset.

[0011] Beneficial effect: The guide of the sliding structure is installed on two parallel and spaced distance-adjusting guide rails, so that both sides of the sliding structure are guided, the moving accuracy of the sliding structure is ensured, the problem of possible swing and position tilt of the sliding structure is avoided, and the purpose of accurately and balanced driving of the sliding structure and the second transmission mechanism is achieved. In addition, the distance between the first transmission mechanism and the second transmission mechanism is detected by the distance measurement module, and the detection signal is transmitted to the controller, which converts the detection signal into a detection distance, compares the detection distance with the set distance in the controller to calculate the offset, and the controller sends a widening and narrowing signal to the corresponding distance adjustment mechanism according to the offset; when the offset calculated by comparing the detection distance with the set distance in the controller is a positive value, it means that the detection distance is greater than the set distance, that is, the distance between the second transmission mechanism and the first transmission mechanism at this position becomes wider, and the controller sends a narrowing signal to the corresponding distance adjustment mechanism; on the contrary, the controller sends a widening signal, and the corresponding driving structure works to achieve the purpose of automatic correction and leveling.

[0012] Furthermore, the driving structure is a screw-nut mechanism, which includes a driving motor, a screw and a nut. The driving motor is transmission-connected to the screw, the nut is fixedly mounted on the sliding structure and cooperates with the screw thread, and the screw is arranged in the middle position of the two adjustable distance guide rails.

[0013] Further, the sliding structure includes two lower sliders and a support plate mounted on the upper sides of the two sliders. A receiving space for installing a nut is provided between the two sliders, and the second conveying mechanism is installed on the support plate.

[0014] Further, the cross-sectional shape of the distance-adjusting guide rail is I-shaped, and a T-shaped chute for concave-convex cooperation with the distance-adjusting guide rail is provided on the slider.

[0015] Further, the first distance-adjusting mechanism further includes a substrate, the substrate is fixedly installed on the bottom plate, and the two distance-adjusting guide rails are fixed on the substrate.

[0016] Further, two distance measuring modules are provided, and the two distance measuring modules are respectively arranged at positions corresponding to the first distance-adjusting mechanism and the second distance-adjusting mechanism.

[0017] Further, the distance measuring module is any one of an infrared distance sensor, a laser distance sensor, and a ultrasonic distance sensor.

[0018] Further, the driving motor is a stepping motor, and the main shaft of the stepping motor is non-rotatably connected to the lead screw.

[0019] Further, an allowable floating range is provided in the controller. The controller is used to control the driving structure to stop when the offset is between the allowable floating range, and to control the corresponding driving structure to work when the offset exceeds the allowable floating range.

[0020] Further, the allowable floating range is from -2 mm to 2 mm. Description of the Drawings

[0021] Figure 1 It is a three-dimensional schematic diagram of the bilateral conveying device in Specific Embodiment 1 of the bilateral conveying device of the present invention;

[0022] Figure 2 It is a three-dimensional schematic diagram of the bilateral conveying device (from another perspective) in Specific Embodiment 2 of the bilateral conveying device of the present invention;

[0023] Figure 3 For Figure 1 the top view schematic diagram of the bilateral conveying device in

[0024] Figure 4 For Figure 1 the enlarged schematic diagram of the first distance-adjusting mechanism in

[0025] In the figure: 1 - bottom plate, 2 - first transmission mechanism, 3 - second transmission mechanism, 4 - first distance adjustment mechanism, 40 - base plate, 41 - driving motor, 42 - distance adjustment guide rail, 43 - lead screw, 44 - sliding structure, 440 - slider, 441 - support plate, 45 - nut, 5 - second distance adjustment mechanism. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] A specific embodiment 1 of the bilateral transmission device of the present invention is as follows Figures 1 to 4 As shown, the double-sided conveying device includes a base plate 1, a first conveying mechanism 2 and a second conveying mechanism 3, and a first distance adjusting mechanism 4 and a second distance adjusting mechanism 5 installed on the base plate 1, and the first conveying mechanism 2 and the second conveying mechanism 3 are arranged in parallel and spaced apart. Among them, the first conveying mechanism 2 is fixedly installed on the base plate 1, and the second conveying mechanism 2 is connected to the first distance adjusting mechanism 4 and the second distance adjusting mechanism 5 by transmission. Specifically, the first conveying mechanism 2 and the second conveying mechanism 3 are both belt conveyors, respectively including pulleys, belts and belt motors. The first conveying mechanism 2 and the second conveying mechanism 3 are arranged to extend horizontally on the plate surface of the base plate 1, and the distance between the first conveying mechanism 2 and the second conveying mechanism 3 is less than the width of the material plate, so as to ensure that the material plate can be stably mounted on the conveying surface of the first conveying mechanism 2 and the second conveying mechanism 3, and the first conveying mechanism 2 and the second conveying mechanism 3 work synchronously to convey the material plate horizontally.

[0028] The first distance adjustment mechanism 4 and the second distance adjustment mechanism 5 are respectively arranged near the end position of the second conveying mechanism 3. The first distance adjustment mechanism 4 and the second distance adjustment mechanism 4 have the same structure. In this embodiment, the first distance adjustment mechanism 4 is taken as an example for detailed description. The first distance adjustment mechanism 4 includes a driving structure, a sliding structure 44 and two distance adjustment guide rails 42 arranged in parallel and spaced apart. The two distance adjustment guide rails 42 extend perpendicularly to the conveying direction respectively. The sliding structure 44 is guided and matched with the two distance adjustment guide rails 42 respectively, and the driving structure is connected to the sliding structure 44 by transmission. The sliding structure 44 is driven by the driving structure to move, and the sliding structure 44 is guided and matched with the two distance adjustment guide rails 42, so that the sliding structure 44 performs translational movement perpendicular to the conveying direction, and then the second conveying mechanism 3 is driven by the sliding structure 44 to perform longitudinal leveling action.

[0029] Specifically, the first distance adjustment mechanism 4 further includes a substrate 40 fixedly mounted on the bottom plate 1, and two distance adjustment guide rails 42 are fixed on the substrate 40. The driving structure is a lead screw nut mechanism, which includes a driving motor 41, a lead screw 43, and a nut 45. The driving motor 41 is connected to the lead screw 43 for transmission. The nut 45 is fixedly mounted on the sliding structure 44, and the nut 45 is in threaded engagement with the lead screw 43. The lead screw 43 is arranged at the middle position between the two distance adjustment guide rails 42. The lead screw nut mechanism is located at the middle position between the two distance adjustment guide rails 42, so that the middle part of the sliding structure 44 is subjected to a driving force and the two sides are subjected to a guiding action, ensuring the moving accuracy of the sliding structure 44, avoiding the problems of possible yaw and position inclination of the sliding structure 44, and achieving the purpose of accurately and balancedly driving the sliding structure 44 and the second conveying mechanism 5.

[0030] Among them, the sliding structure 44 includes two lower sliders 440 and a support plate 441 mounted on the upper sides of the two sliders 440. A receiving space for installing the nut 45 is provided between the two sliders 440, and the second conveying mechanism 3 is installed on the support plate 441. That is, the two sliders 440 are respectively located on the lower sides of both sides of the sliding structure 44, the nut 45 is arranged in the middle of the two sliders 440, and the second conveying mechanism 3 is installed on the support plate 441 of the sliding structure 44, improving the smoothness of the guiding movement of the sliding structure 44, and further ensuring that the sliding structure 44 can accurately transmit the second conveying mechanism 3, realizing the accurate leveling of the second conveying mechanism 3. To ensure the reliability of the guiding assembly between the slider 440 and the distance adjustment guide rail 42, the cross-sectional shape of the distance adjustment guide rail 42 is an I-shaped, and the slider 440 is provided with a T-shaped chute that is in concave-convex fit with the distance adjustment guide rail 42. The T-shaped chute of the slider 440 is in concave-convex fit with the distance adjustment guide rail 42, and a anti-disengagement and blocking effect is formed between the slider 440 and the distance adjustment guide rail 42, avoiding the problem of possible floating disengagement of the slider 440 during the guiding movement.

[0031] The bilateral conveying device further includes a ranging module and a controller (not shown in the figure). The ranging module is used to detect the distance between the first conveying mechanism 2 and the second conveying mechanism 3. The controller is electrically connected to the detection module and the driving structure respectively. The controller is used to receive the detection signal of the detection module, compare the detected distance with the set distance to calculate the offset, and control the corresponding driving structure to work according to the offset. In this embodiment, there are two ranging modules, and the two ranging modules are respectively arranged at the positions corresponding to the first distance adjustment mechanism 4 and the second distance adjustment mechanism 5. Specifically, the ranging module is an infrared ranging sensor, which includes an infrared emitting element and an infrared receiving element. The infrared light emitted by the infrared emitting element is irradiated on the object to be ranged, and the object to be ranged reflects the infrared light back and is sensed by the infrared receiving element. The measured distance is calculated according to the time difference between the emission and reception.

[0032] The ranging module corresponding to the position of the first distance adjustment mechanism 4 detects the distance between the first conveying mechanism 2 and the second conveying mechanism 3 at this position, and transmits the detection signal to the controller. The controller converts the detection signal into a detected distance, compares the detected distance with the set distance in the controller to calculate the offset. This offset is the offset between the second conveying mechanism 3 and the first conveying mechanism 2 corresponding to the position of the first distance adjustment mechanism 4. The controller sends width adjustment and narrowing signals to the first distance adjustment mechanism 4 according to this offset. Correspondingly, the ranging module corresponding to the position of the second distance adjustment mechanism 5 detects the distance between the first conveying mechanism 2 and the second conveying mechanism 3 at this position, and transmits the detection signal to the controller. The controller converts the detection signal into a detected distance, compares the detected distance with the set distance in the controller to calculate the offset. This offset is the offset between the second conveying mechanism 3 and the first conveying mechanism 2 corresponding to the position of the second distance adjustment mechanism 5. The controller sends width adjustment and narrowing signals to the second distance adjustment mechanism 5 according to this offset.

[0033] When the offset calculated by comparing the detected distance with the set distance in the controller is positive, it indicates that the detected distance is greater than the set distance, that is, the distance between the second conveying mechanism 3 and the first conveying mechanism 2 at this position becomes wider. The controller sends a narrowing signal to the corresponding distance adjustment mechanism. The driving structure works according to the signal sent by the controller. Specifically, the driving motor of the lead screw nut mechanism is a stepping motor 41. The main shaft of the stepping motor 41 is non-rotatably connected to the lead screw 43. The displacement of the sliding structure 44 and the second conveying mechanism 3 is accurately controlled by controlling the rotation angle of the main shaft of the stepping motor 41. The accuracy of the stepping motor driving the second conveying mechanism 3 to perform width adjustment actions is higher. For example: when the main shaft of the stepping motor 41 rotates counterclockwise by 270°, the sliding structure 44 and the second conveying mechanism 3 narrow by 1.5 mm in the direction close to the first conveying mechanism 2; when the main shaft of the stepping motor 41 rotates clockwise by 180°, the sliding structure 44 and the second conveying mechanism 3 widen by 1 mm in the direction away from the first conveying mechanism 2.

[0034] To avoid frequent startup of the first distance adjustment mechanism 4 and the second distance adjustment mechanism 5, a permitted floating range is provided in the controller. When the offset is within the permitted floating range, the controller controls the drive structure to stop; when the offset exceeds the permitted floating range, the controller controls the corresponding drive structure to operate. Specifically, the permitted floating range in the controller is from -2 mm to 2 mm. When the offset of the second conveying mechanism 3 is within the permitted floating range, that is, the offset amplitude of the second conveying mechanism 3 is within the permitted range at this time, the controller controls the first distance adjustment mechanism 4 or the second distance adjustment mechanism 5 to remain stopped, and the first conveying mechanism 2 and the second conveying mechanism 3 can accurately and smoothly convey the material plate; when the offset of the second conveying mechanism 3 exceeds the permitted floating range, that is, the offset amplitude of the second conveying mechanism 3 is too large at this time, the controller controls the first distance adjustment mechanism 4 or the second distance adjustment mechanism 5 to operate, and corrects and levels the second conveying mechanism 3 to an equal-width position parallel to the first conveying mechanism 2, achieving the purpose of automatic correction and leveling.

[0035] In other specific embodiments of the bilateral conveying device of the present invention, to meet different usage requirements, the distance measuring module is not limited to the infrared distance sensor in specific embodiment 1, and the infrared distance sensor can also be replaced with a laser distance sensor or an ultrasonic distance sensor, which can also achieve the purpose of automatically detecting the distance between the first conveying mechanism and the second conveying mechanism.

[0036] In other specific embodiments of the bilateral conveying device of the present invention, to meet different usage requirements, the permitted floating range in the controller is not limited to -2 mm to 2 mm in specific embodiment 1, and the permitted floating range in the controller can also be adjusted to -1 mm to 1 mm, -2 mm to 2 mm, -5 mm to 5 mm, or other numerical ranges, which can also reduce the working frequency of the distance adjustment mechanism and take into account the requirement of ensuring the parallelism between the first conveying mechanism and the second conveying mechanism.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A bilateral transmission device, characterized in that, It includes a bottom plate, a first transmission mechanism and a second transmission mechanism, and a first distance adjustment mechanism and a second distance adjustment mechanism installed on the bottom plate, wherein the first transmission mechanism and the second transmission mechanism are arranged in parallel and spaced apart, the first transmission mechanism is fixedly installed on the bottom plate, and the second transmission mechanism is transmission-connected with the first distance adjustment mechanism and the second distance adjustment mechanism; The first distance adjusting mechanism and the second distance adjusting mechanism have the same structure, and both include a driving structure, a sliding structure, and two distance adjusting guide rails arranged in parallel and spaced apart, the two distance adjusting guide rails respectively extend perpendicular to the conveying direction, the sliding structures respectively cooperate with the two distance adjusting guide rails for guidance, the driving structure is connected to the sliding structure by transmission, and the sliding structure of the first distance adjusting mechanism and the sliding structure of the second distance adjusting mechanism are respectively installed near the end of the second conveying mechanism; The bilateral transmission device further includes a distance measuring module and a controller, wherein the distance measuring module is used to detect the distance between the first transmission mechanism and the second transmission mechanism, and the controller is electrically connected to the distance measuring module and the driving structure respectively; the controller is used to receive a detection signal from the distance measuring module, and compare the detected distance with the set distance to calculate an offset, and control the corresponding driving structure to work according to the offset; The driving structure is a screw-nut mechanism, which includes a driving motor, a screw and a nut. The driving motor is in transmission connection with the screw. The nut is fixedly mounted on the sliding structure and cooperates with the screw thread. The screw is arranged in the middle of the two adjustable distance guide rails. The sliding structure comprises two sliders at the bottom, a support plate installed on the upper sides of the two sliders, an accommodation space for installing nuts is provided between the two sliders, and the second transmission mechanism is installed on the support plate; There are two distance measuring modules, and the two distance measuring modules are respectively arranged at positions corresponding to the first distance adjusting mechanism and the second distance adjusting mechanism; The controller is provided with an allowable floating interval, and the controller is used to control the drive structure to stop when the offset is between the allowable floating interval, and to control the corresponding drive structure to work when the offset exceeds the allowable floating interval; The driving motor is a stepper motor, the main shaft of the stepper motor is connected to the lead screw for rotation prevention, and the displacement of the sliding structure and the second transmission mechanism is accurately controlled by controlling the rotation angle of the main shaft of the stepper motor; the allowable floating range is -2mm to 2mm.

2. The bilateral transmission device according to claim 1, characterized in that, The cross-section of the distance-adjusting guide rail is an I-shape, and the sliding block is provided with a T-shaped sliding groove which is concave-convexly matched with the distance-adjusting guide rail.

3. The bilateral transmission device according to claim 1, characterized in that, The first distance adjustment mechanism also includes a base plate, the base plate is fixedly mounted on the bottom plate, and the two distance adjustment guide rails are fixed on the base plate.

4. The bilateral transmission device according to claim 1, characterized in that, The distance measuring module is any one of an infrared distance measuring sensor, a laser distance measuring sensor and an ultrasonic distance measuring sensor.

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