Carrier roller stress eliminating device for eliminating clamping stagnation phenomenon of bearing

Abstract

The invention relates to the technical field of carrier roller assembly, in particular to a carrier roller stress eliminating device for eliminating the clamping stagnation phenomenon of a bearing. Two movable sliding tables are symmetrically arranged on a fixed base in a sliding mode. A sliding table driving mechanism used for driving the two movable sliding tables to move close to each other or away from each other is arranged in the fixed base. Two sets of lifting mechanisms used for supporting the two ends of the lifting carrier roller in a matched mode are symmetrically arranged on the sides, close to each other, of the two movable sliding tables; two carrier roller knocking mechanisms used for correspondingly knocking the two ends of the roller shaft are symmetrically arranged above the two movable sliding tables. According to the carrier roller stress eliminating device, the pneumatic knocking hammer capable of expanding, shrinking and sliding is adopted, manual work can be better assisted or even completely replaced to complete the work of knocking vibration to eliminate clamping stagnation of a bearing, and the carrier roller stress eliminating device can adapt to machining of various carrier roller products with different specifications and lengths and has good adaptability and compatibility; the technical problems of labor intensity and potential safety hazards caused by manual knocking of the carrier roller in the carrier roller assembling process in the prior art are well solved.

Description

Technical Field

[0001] This invention belongs to the field of idler assembly and manufacturing technology for belt conveyors, and specifically relates to an idler stress relief device for eliminating bearing jamming. Background Technology

[0002] Belt conveyors, also known as rubber belt conveyors or belt conveyors, are often simply called belt conveyors. They mainly consist of a conveyor belt, head rollers, tail rollers, an intermediate frame, and upper and lower idler groups. The upper idler group consists of an upper idler frame and upper idlers mounted on it, while the lower idler group consists of a lower idler frame and lower idlers mounted on it. The upper idler group is often a trough-type triple idler consisting of three idlers, while the lower idler group is often a V-shaped double idler consisting of two idlers. The idler components are mainly assembled from roller shafts, rollers, bearings, and seals. The purpose of idler assembly is to allow the roller shaft to rotatably pass through the roller. Each end of the roller has a bearing seat fixedly welded to it. During assembly, the two bearings are first pressed into the bearing seats, and then the roller shaft passes through the middle of the inner circles of the two bearings.

[0003] However, in the actual production process of idler roller assembly, after the bearing is pressed in and the roller shaft is inserted, there may be axial pressure on the inner and outer circles of the bearing, which may cause the bearing to jam, or the roller to have excessive damping and not rotate smoothly after the roller shaft is inserted. This does not meet the quality requirements of the idler roller component to roll smoothly. In order to eliminate the phenomenon of bearing jamming, it is often necessary to tap both ends of the roller shaft to restore the smooth rotation between the inner and outer circles of the bearing and the bearing roller through vibration. Currently, this hammering operation is mostly carried out using traditional manual hammering. However, manual hammering has two safety risks: firstly, it is unsafe for the workers, as there is a risk of injury due to the high labor intensity and human error, such as accidentally dropping the hammer; secondly, it is unsafe for the products, as excessive force can damage the bearings, while insufficient force requires repeated hammering, which is also detrimental to the bearings. Therefore, there is an urgent need to find an automated idler roller hammering machine specifically designed for idler roller assembly that can eliminate bearing jamming, so as to better assist or even completely replace manual labor in completing the idler roller assembly hammering work. Summary of the Invention

[0004] In response to the above situation, the present invention provides a roller stress relief device for eliminating bearing jamming, which can complete the roller tapping work during the roller assembly process and improve the mechanization of the entire roller production process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A roller stress relief device for eliminating bearing jamming includes a fixed base. Two parallel linear guide rails are laid on the left and right side walls of the top of the fixed base. Two symmetrically arranged movable slides are slidably mounted on the two linear guide rails. The fixed base contains a slide drive mechanism for driving the two movable slides to move closer or further apart. Two lifting and supporting mechanisms are symmetrically arranged on the side where the two movable slides are close together, for supporting and lifting both ends of the roller. Two roller striking mechanisms are symmetrically arranged above the two movable slides, for striking the ends of the roller shaft.

[0006] Furthermore, the bottom of each of the two movable slides is slidably mounted above the two linear guides via linear sliders; the movable slide is preferably a horizontal rectangular plate with four linear sliders installed at its four corners. The movable slide is slidably mounted above the two linear guides via the four linear sliders, which can adapt to the processing of idler rollers of different lengths and specifications, and has extremely strong adaptability and compatibility.

[0007] Furthermore, the slide drive mechanism includes a bidirectional screw that is rotatably disposed through the middle of the fixed base. One end of the fixed base is provided with a sliding motor for driving the bidirectional screw to rotate. Each of the two movable slides is fixedly connected to a threaded sleeve below it. The two threaded sleeves are slidably screwed onto the outside of the positive and negative threaded rods at both ends of the bidirectional screw.

[0008] Furthermore, the lifting and supporting mechanism includes a vertically arranged lifting plate. The top front of the lifting plate is provided with a V-shaped groove for positioning and placing the roller. Two vertical guide rails are symmetrically arranged on the left and right sides of the back of the lifting plate. A connecting seat is fixedly provided on the movable slide. Two guide sliders corresponding to the two vertical guide rails are respectively provided on the upper left and right sides of the connecting seat. A drive connecting seat is also provided on the back of the lifting plate. A lifting and pushing mechanism for driving the lifting and lowering movement of the lifting plate is also provided on the movable slide.

[0009] Furthermore, the roller striking mechanism includes a support mounting frame fixedly connected above the movable slide table. Two horizontal guide rails are arranged parallel to each other on the left and right sides above the support mounting frame. A pusher is slidably arranged above one end of the two horizontal guide rails near the roller to push the roller end of the roller into alignment and positioning. A striking platform is slidably arranged above the other end of the two horizontal guide rails. A striking hammer assembly for striking the end of the roller shaft is installed above the striking platform.

[0010] Furthermore, the front and rear ends of the bidirectional screw are rotatably protruding from the front and rear side walls of the fixed base via bearings with mounting brackets, and one end of the bidirectional screw is connected to the sliding motor for transmission; the sliding motor is a servo motor equipped with an encoder at the tail, and a reducer is also connected to the output end of the servo motor, and one end of the bidirectional screw is connected to the output shaft of the reducer via a coupling.

[0011] Furthermore, the lifting and pushing mechanism preferably employs a worm gear jack driven by a lifting motor. The lifting motor is a geared motor, and its output shaft is connected to the input end of the worm gear jack. The output end of the worm gear jack is connected to the drive connecting seat. Of course, the worm gear jack can also be replaced by a telescopic rod device such as a telescopic electric cylinder or a hydraulic cylinder; this is merely a preferred embodiment.

[0012] Furthermore, the hammer assembly includes a hammerhead assembly and a pneumatic hammer. The hammerhead assembly includes a fixed sleeve fixedly connected to the striking platform. An impact pin is slidably mounted coaxially in the middle of the fixed sleeve. A return spring is connected between the head of the impact pin and the fixed sleeve. The tail of the fixed sleeve is coaxially connected to the pneumatic hammer via a coupling. The head of the impact pin extends movably from a notch in the middle of the push frame to align with the end of the roller shaft of the impact roller. The actuating end of the pneumatic hammer is coaxially aligned with the tail end of the impact pin, and a certain striking distance is left between them. Of course, the pneumatic hammer can also be replaced by a similar striking device with similar functions, such as an electromagnetic hammer; this is just a preferred solution.

[0013] Furthermore, a push-pull seat is connected below the push-pull frame, and a push-telescopic rod is installed below the striking platform. The piston rod of the push-telescopic rod is connected to the push-pull seat to drive the push-pull frame to slide back and forth. A push block is connected below the striking platform, and a push-pull telescopic rod is installed at the end of the support mounting frame away from the roller. The telescopic end of the push-pull telescopic rod is connected to the push block to drive the striking platform to slide back and forth. Both the push-pull telescopic rod and the push-telescopic rod are preferably telescopic cylinders. Of course, the telescopic cylinder can also be replaced by a telescopic electric cylinder or a hydraulic cylinder, etc., but this is just a preferred solution.

[0014] The present invention also includes other components that enable its normal use, all of which are conventional means in the art. In addition, devices or components not limited in the present invention, such as bidirectional screws, threaded sleeves, linear guides, linear sliders, servo motors, worm gear lifts, pneumatic hammers, etc., all adopt existing technologies in the art.

[0015] The beneficial effects of this invention are as follows: This idler roller stress relief device uses an expandable and retractable pneumatic hammer, which can better assist or even completely replace manual work in eliminating bearing jamming by striking vibrations. It can also adapt to the processing of idler rollers of various specifications and lengths, and has good adaptability and compatibility. It effectively solves the technical problems of labor intensity and safety hazards caused by manual striking of idler rollers in the existing technology, and helps to improve the mechanization of idler roller production. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the roller stress relief device used to eliminate bearing jamming in this invention; Figure 2 for Figure 1 Enlarged front view of the front view of the roller striking mechanism in section A; Figure 3 for Figure 1 Enlarged view of the rear of the roller striking mechanism in section B. Detailed Implementation

[0017] The present invention will now be clearly described in conjunction with the accompanying drawings and specific embodiments. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the present invention.

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "center," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for ease of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Example 1 like Figure 1-3As shown, a stress relief device for eliminating bearing jamming in idlers includes a fixed base 1 with a rectangular frame structure. Two parallel linear guide rails 2 are laid on the left and right side walls of the open top of the fixed base. Two symmetrically arranged movable slides 3 are slidably mounted on the two linear guide rails. The bottom of each of the two movable slides is slidably positioned above the two linear guide rails via linear sliders 4. Each movable slide is a horizontally arranged rectangular plate with four linear sliders installed at its four corners. The movable slide is slidably mounted above the two linear guide rails via the four linear sliders. The distance between the two movable slides is adjusted by expansion and contraction, allowing for the processing of idlers of different lengths and specifications.

[0020] The fixed base is equipped with a slide drive mechanism for driving the two movable slides to move closer or further apart. The slide drive mechanism includes a bidirectional screw 5 rotatably passing through the middle of the fixed base. One end of the fixed base is equipped with a sliding motor 6 for driving the bidirectional screw to rotate. Each of the two movable slides is fixedly connected to a threaded sleeve (not shown in the figure) below it. The two threaded sleeves are slidably screwed onto the outside of the positive and negative threaded rods at both ends of the bidirectional screw. The front and rear ends of the bidirectional screw are rotatably protruding from the front and rear side walls of the fixed base through bearings 7. One end of the bidirectional screw is connected to the sliding motor. The sliding motor is a servo motor equipped with an encoder at the tail. A reducer 8 is also connected to the output end of the servo motor. One end of the bidirectional screw is connected to the output shaft of the reducer through a coupling. When the sliding motor drives the bidirectional screw to rotate forward, it drives the two movable slides to move towards each other and get closer to each other through the two threaded sliding sleeves; when the bidirectional screw rotates in reverse, it drives the two movable slides to move away from each other and get further apart.

[0021] Two sets of lifting and supporting mechanisms for supporting the two ends of the lifting rollers are symmetrically arranged on one side of the two movable slides that are close to each other. The lifting and supporting mechanism includes a vertically arranged lifting plate 9. The top front of the lifting plate is provided with a V-shaped groove 10 for positioning and placing the roller. Two vertical guide rails 11 are symmetrically arranged on the left and right sides of the back of the lifting plate. A connecting seat 12 is fixedly arranged on the movable slide. Two guide sliders 13 are respectively provided on the upper left and right sides of the connecting seat, which slide in a corresponding manner with the two vertical guide rails. A drive connecting seat (not shown in the figure) is also provided on the back of the lifting plate. A lifting and pushing mechanism for driving the lifting and lowering movement of the lifting plate is also provided on the movable slide.

[0022] The lifting and pushing mechanism adopts a worm gear jack driven by a lifting motor. The lifting motor is a geared motor, and the output shaft of the geared motor is connected to the input end of the worm gear jack. The output end of the worm gear jack is connected to the drive connecting seat.

[0023] Two sets of roller striking mechanisms for corresponding striking the ends of the roller shafts are symmetrically arranged above the two movable slides. The roller striking mechanism includes a support mounting frame 14 fixedly connected above the movable slides. Two horizontal guide rails 15 are arranged parallel to each other on the left and right sides above the support mounting frame. A pusher frame 16 is slidably arranged above the two horizontal guide rails near the roller to push the roller end of the roller and position it. A striking platform 17 is slidably arranged above the other end of the two horizontal guide rails. A push block 18 is connected below the striking platform. A push-pull telescopic rod 19 is installed at the end of the support mounting frame away from the roller. The telescopic end of the push-pull telescopic rod is connected to the push block. A striking hammer assembly for striking the ends of the roller shafts is installed above the striking platform. The push-pull telescopic rod drives the striking platform to slide back and forth via the push block. A push-pull seat 20 is connected to the lower part of the push frame. A push-pull telescopic rod (not shown in the figure) is installed below the striking platform. The top end of the piston rod of the push-pull telescopic rod is connected to the push-pull seat and is used to drive the push frame to slide back and forth. Both the push-pull telescopic rod and the push-pull telescopic rod are telescopic cylinders.

[0024] The hammer assembly includes a hammer head assembly and a pneumatic hammer 21. The hammer head assembly includes a fixed sleeve 22 fixedly connected to the striking platform. An impact pin 23 is coaxially and slidably fitted in the middle of the fixed sleeve. A return spring (not shown in the figure) is connected between the head of the impact pin and the fixed sleeve. The tail of the fixed sleeve is coaxially connected to the pneumatic hammer via a coupling 24. The head of the impact pin extends movably from a notch in the middle of the push frame for aligning with the impact roller. At the end of the roller shaft, the actuating end of the pneumatic hammer is coaxially aligned with the tail end of the impact pin, and a certain striking distance is left between them. When striking, the actuating end of the pneumatic hammer strikes the tail end of the impact pin, causing the head end of the impact pin to pop outward and strike the roller shaft of the idler roller. After the striking is completed, the actuating end of the pneumatic hammer retracts and leaves the impact pin. At this time, the impact pin retracts into the fixed sleeve of the hammer head assembly under the action of the return spring, preparing for the next striking.

[0025] Example 2 The only difference from Embodiment 1 is that the lifting and pushing mechanism uses a vertically installed telescopic electric cylinder instead of the worm gear lift in Embodiment 1. The telescopic end of the electric cylinder is connected to the drive connecting seat on the back of the lifting plate, which can also realize the vertical lifting and lowering of the lifting plate, and can stop and position it at any height.

[0026] Both the push-pull telescopic rod and the top-push telescopic rod use telescopic electric cylinders instead of telescopic air cylinders in Embodiment 1; at the same time, an electromagnetic hammer is used instead of a pneumatic hammer in Embodiment 1, which can also achieve the hammer striking the impact pin, and transmit the impact pin to the roller shaft of the idler roller, so as to achieve the purpose of eliminating bearing jamming by striking vibration on the idler roller.

[0027] Example 3 The only difference from Embodiment 1 is that the lifting and pushing mechanism uses a vertically installed hydraulic cylinder instead of the worm gear lift in Embodiment 1; and the pushing and pulling telescopic rod and the jacking telescopic rod both use horizontally installed hydraulic cylinders instead of the telescopic cylinders in Embodiment 1.

[0028] A limit switch 25 is also installed on the outer side of the connecting seat to sense when the lifting plate has risen to its highest position. A trigger plate 26 is correspondingly provided on the outer side of the lifting plate to trigger the limit switch. During the lifting process, when the trigger plate triggers the limit switch, it controls the lifting and pushing mechanism to stop lifting. At the same time, the height of the trigger plate can be adjusted to adapt to the lifting position settings of roller workpieces with different diameters. The lifting height of the roller to be struck can be determined through debugging in the early stage of roller processing, ensuring that when the lifting plate is raised to its highest position, the impact pin is exactly coaxially aligned with the end of the roller shaft.

[0029] Example 4 The only difference from Embodiment 1 is that an inductive switch 27 for detecting whether a roller workpiece is placed in the V-shaped groove is installed on the back of the lifting plate, and an automatic control cabinet (not shown in the figure) for controlling the automated operation of the entire roller stress relief device is set on the outside of the fixed base. Meanwhile, the loading and unloading of the rollers in the roller stress relief device is completed by a robot (not shown in the figure). Both the inductive switch and the robot are electrically connected to the automatic control cabinet. When the robot places a roller workpiece into the V-shaped groove, the inductive switch detects that a workpiece is in place, and the automatic control cabinet controls the roller stress relief device to automatically complete the roller tapping operation to eliminate bearing jamming. After processing one roller workpiece, the robot automatically unloads the roller, then loads the next roller workpiece, and the next tapping operation begins, and so on.

[0030] When using this roller stress relief device, first, adjust the lifting distance between the two movable slides and the corresponding two lifting mechanisms above them according to the specifications and length of the roller to be processed. Then, place the roller workpiece into the V-shaped groove of the two lifting plates. The roller cylinder is lifted in the V-shaped groove, and the center line of the roller shaft coincides with the axis of the impact pin. Then, the two push frames push out and press against both ends of the roller cylinder to complete the positioning of the roller workpiece. This ensures that no matter whether the roller workpiece is placed in front or behind, the positioning of the roller is always in the same position after each push. It also achieves the clamping and positioning of the roller workpiece. Then, the striking platform of the roller striking mechanism slides closer to the roller workpiece until the head of the impact pin is aligned with and abuts the end face of the roller shaft. Then, the striking hammer strikes the tail end of the impact pin, thereby transmitting the vibration to the roller and loosening the roller bearing by striking, so as to eliminate the jamming phenomenon between the inner and outer circles of the bearing and the bearing roller.

[0031] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A stress relief device for eliminating bearing jamming in idler rollers, comprising a fixed base, characterized in that: Two movable slides are slidably and symmetrically arranged on the fixed base; the fixed base is provided with a slide drive mechanism for driving the two movable slides to move closer to each other or away from each other; two sets of lifting and supporting mechanisms for cooperating to support and lift the two ends of the idler roller are symmetrically arranged on the side where the two movable slides are close to each other; two sets of idler roller striking mechanisms for corresponding striking roller shaft ends are symmetrically arranged above the two movable slides.

2. The roller stress relief device for eliminating bearing jamming according to claim 1, characterized in that: The bottoms of the two movable slides are each slidably mounted above the two linear guides via linear sliders.

3. The roller stress relief device for eliminating bearing jamming according to claim 1, characterized in that: The slide drive mechanism includes a bidirectional screw that is rotatably disposed through the middle of the fixed base. One end of the fixed base is provided with a sliding motor for driving the bidirectional screw to rotate. Each of the two movable slides is fixedly connected to a threaded sleeve below it, and the two threaded sleeves are slidably screwed onto the two ends of the bidirectional screw.

4. The roller stress relief device for eliminating bearing jamming according to claim 1, characterized in that: The lifting and supporting mechanism includes a vertically arranged lifting plate. The top front of the lifting plate has a V-shaped groove for positioning and placing the roller. Two vertical guide rails are symmetrically arranged on the left and right sides of the back of the lifting plate. A connecting seat is fixedly arranged on the movable slide. Two guide sliders corresponding to the two vertical guide rails are respectively arranged on the upper left and right sides of the connecting seat. A drive connecting seat is also provided on the back of the lifting plate. A lifting and pushing mechanism for driving the lifting and lowering movement of the lifting plate is also provided on the movable slide.

5. A roller stress relief device for eliminating bearing jamming according to claim 1, characterized in that: The roller striking mechanism includes a support mounting frame fixedly connected above the movable slide table. Two horizontal guide rails are arranged parallel to each other on the upper left and right sides of the support mounting frame. A pusher frame is slidably mounted above the two horizontal guide rails near the roller to push the roller end of the roller and position it. A pusher telescopic rod is installed below the striking platform to drive the pusher frame to slide back and forth. A striking platform is slidably mounted above the other end of the two horizontal guide rails. A push-pull telescopic rod is installed at the end of the support mounting frame away from the roller to drive the striking platform to slide back and forth. A striking hammer assembly for striking the end of the roller shaft is installed above the striking platform.

6. A roller stress relief device for eliminating bearing jamming according to claim 3, characterized in that: The front and rear ends of the bidirectional screw are rotatably protruding from the front and rear side walls of the fixed base through bearings, and one end of the bidirectional screw is connected to the sliding motor for transmission.

7. A roller stress relief device for eliminating bearing jamming according to claim 6, characterized in that: The sliding motor is a servo motor equipped with an encoder at the tail. A reducer is also connected to the output end of the servo motor. One end of the bidirectional screw is connected to the output shaft of the reducer via a coupling.

8. A roller stress relief device for eliminating bearing jamming according to claim 4, characterized in that: The lifting and pushing mechanism is a worm gear lift driven by a lifting motor.

9. A roller stress relief device for eliminating bearing jamming according to claim 5, characterized in that: The hammer assembly includes a hammer head assembly and a hammer. The hammer head assembly includes a fixed sleeve fixedly connected to the striking platform. An impact pin is slidably mounted coaxially in the middle of the fixed sleeve. A return spring is connected between the head of the impact pin and the fixed sleeve. The tail of the fixed sleeve is coaxially connected to the hammer via a coupling.

10. A roller stress relief device for eliminating bearing jamming according to claim 5, characterized in that: Both the push-pull telescopic rod and the push-pull telescopic rod are telescopic cylinders.

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