Adjustable tensioning mechanism and adjusting method for upper and lower sliding rails of automatic car loader

Abstract

The application discloses an adjustable tensioning mechanism of upper and lower slide rails of an automatic car loader, which comprises a mounting seat, the upper end of the mounting seat is used for being connected with an inner frame, the lower end of the mounting seat is hinged with L-shaped plates through hinge shafts, the hinge shafts are connected with the corner parts of the L-shaped plates; pulleys are connected between the left ends of the two L-shaped plates through an axle; a support column extending along the front and back directions is fixed to the upper part of the mounting seat, an upper connecting column is connected between the upper ends of the two L-shaped plates; an adjusting screw rod extending horizontally along the left and right directions is arranged in the mounting seat, the adjusting screw rod slides through the support column and the upper connecting column, the adjusting screw rod on the right side of the upper connecting column has a large end; the left end of the adjusting screw rod has a left pressing plate, a spring is arranged on the adjusting screw rod between the left pressing plate and the support column; the adjusting screw rod on the right side of the support column is threadedly connected with an adjusting nut. The application further discloses a corresponding adjusting method. The application can adapt the pulleys to the gap changes between the outer frame and the inner frame of the upper and lower slide rails of the automatic car loader, and can adjust the pre-tightening force between the pulleys and the outer frame to reduce the resonance probability.

Description

Technical Field

[0001] This invention relates to the field of automatic loading machine technology, specifically an adjustable tensioning mechanism for the upper and lower sliding rails of an automatic loading machine. Background Technology

[0002] With the rapid development of technology, the logistics industry is undergoing unprecedented changes. Loading and unloading goods is an indispensable part of the logistics process, and its efficiency directly affects the smoothness of the entire process. Traditional manual loading and unloading methods suffer from high intensity, low efficiency, and are prone to errors, becoming a bottleneck restricting the development of the logistics industry. Automated loading machines, on the other hand, have a bright future in the logistics sector.

[0003] A truck loader is a specialized piece of machinery used for transporting and loading materials, widely applied in mines, construction sites, and storage yards. In recent years, with the continuous increase in national infrastructure investment, the truck loader industry has developed rapidly. Simultaneously, with continuous technological advancements, the technical level of truck loaders is also constantly improving. New types of truck loaders are characterized by automation, intelligence, and environmental friendliness, and in their applications, they can improve work efficiency by automating loading, reducing labor intensity, and saving human resources.

[0004] like Figures 1 to 3 As shown, the automatic loading machine has upper and lower sliding rails, which are composed of an inner frame 1 and an outer frame 2. A pulley 3 is provided between the inner frame 1 and the outer frame 2. The mounting base of the pulley 3 is installed on either the inner frame 1 or the outer frame 2, and the pulley 3 contacts the outer frame 2 and the inner frame 1 respectively. During operation, the inner frame 1 and the outer frame 2 will undergo relative vertical displacement. The pulley 3 maintains a certain gap between the inner frame 1 and the outer frame 2, and also forms a rolling fit between the inner frame 1 and the outer frame 2, reducing frictional resistance.

[0005] In production practice and modeling analysis, it was found that after a long period of lifting operation, the pulley 3 and the outer frame 2 (or inner frame 1) in contact with it will have a small displacement and shaking, which will have an adverse effect on the loading operation of the loading machine, such as unstable operation and resonance.

[0006] This is because when the automatic loading machine was first put into use, the inner frame 1 and the outer frame 2 had a stable fit clearance during the relative vertical displacement process; after long-term use, due to factors such as wear and vibration, the fit clearance between the inner frame 1 and the outer frame 2 became unstable during the relative vertical displacement process.

[0007] When the automatic loading machine is working, a certain load impact phenomenon may occur. Under the action of load impact, the gap between the outer frame 2 and the inner frame 1 may oscillate and change. The existing pulley 3 mechanism cannot cope with this gap oscillation phenomenon, resulting in the automatic loading machine moving up and down unstably.

[0008] When comparing design ideas, if a spring seat is simply set between the mounting base of pulley 3 and the inner frame 1 (or outer frame 2), on the one hand, the number of parts and the amount of assembly work will increase (the spring seat needs to be installed on the inner frame 1 first, and then the mounting base of pulley 3 needs to be installed on the spring seat). On the other hand, it is not convenient to adjust the preload (pre-set pressure) of pulley 3 on the outer frame 2 (or inner frame 1) as needed. Summary of the Invention

[0009] The purpose of this invention is to provide an adjustable tensioning mechanism for the upper and lower slide rails of an automatic loading machine. By making structural improvements to only one part, the pulley with the mounting seat, it can effectively solve the problem of unstable (or oscillating) fit clearance between the inner and outer frames of the upper and lower slide rails of the automatic loading machine after long-term use or under load impact. It also makes it easy to adjust the preload between the pulley and the outer frame (or inner frame) to reduce the probability of resonance.

[0010] To achieve the above objectives, the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention includes a mounting base, which has a groove structure with the bottom of the groove facing upwards; the upper end of the mounting base is used for fixed connection with the inner frame or the outer frame. An L-shaped plate is hinged to the lower end of the mounting base via a hinge shaft. The hinge shaft is connected to the corner of the L-shaped plate. The L-shaped plate is located in the groove formed by the mounting slot and there are two L-shaped plates symmetrically arranged front and back. The L-shaped plate has a left end and a top end. The left end of the L-shaped plate extends to the left of the mounting base, and its top end is located at the rear top of the mounting base. A pulley is connected between the left ends of the two L-shaped plates through a wheel axle. The pulley is used to press against the outer frame or inner frame to form a rolling fit. The upper part of the mounting base is fixed with a support column extending in the front-to-back direction. An upper connecting column is connected between the upper ends of the two L-shaped plates. The upper connecting column is higher than the pulley and is located on the same horizontal plane as the support column. The mounting base is equipped with an adjusting screw that extends horizontally in the left and right direction. The adjusting screw slides through the support column and the upper connecting column. The adjusting screw on the right side of the upper connecting column has a large end. The diameter of the hole on the support column for sliding through the adjusting screw is larger than the outer diameter of the adjusting screw, thus forming a movable fit between the adjusting screw and the support column; The left end of the adjusting screw has a left pressure plate, and a spring is sleeved on the adjusting screw between the left pressure plate and the support column; under the preload of the spring, the large end of the adjusting screw presses tightly to the left onto the connecting column; The adjusting screw on the right side of the support column is threaded with an adjusting nut. The spring is used to make the pulley adapt to the change in the gap between the outer frame and the inner frame of the upper and lower rails of the automatic loading machine. The adjusting nut is used to adjust the preload between the pulley and the outer or inner frame to reduce the probability of resonance.

[0011] The pulleys are made of wear-resistant rubber.

[0012] One end of the spring is a connecting end and the other end is a free end. The connecting end is fixedly connected to the left pressure plate or support column, and the free end is pressed into the support column or left pressure plate.

[0013] The present invention also discloses a method for adjusting the preload and gap matching using the adjustable tensioning mechanism of the upper and lower rails of the automatic loading machine. The adjustable tensioning mechanism of the upper and lower rails of the automatic loading machine is installed between the outer frame and the inner frame of the upper and lower rails of the automatic loading machine. The upper end of the mounting seat is fixed on the inner frame, and the pulley is pressed on the outer frame. The gap between the outer frame and the inner frame is called the installation gap; the adjustment method includes a gap adjustment method and a vibration adjustment method. The gap adjustment method is as follows: After the automatic loading machine has been used for a long time, For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the part where the installation gap increases, rotate the adjusting nut to loosen it. Under the action of the spring force, the left pressure plate drives the upper connecting column and the upper end of the L-shaped plate to rotate to the left through the large end of the screw. At this time, the left end of the L-shaped plate rotates downward until the pulley and the outer frame are in contact and have the predetermined tension. For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the location where the installation gap becomes smaller, rotate the adjusting nut to tighten it. Under the pressure of the left pressure plate, the spring is further compressed, allowing the left end of the L-shaped plate to rotate upward under the pressure of the outer frame and the upper end of the L-shaped plate to rotate to the right until the pulley and the outer frame are in contact and have a predetermined tightening force. The vibration adjustment method is as follows: Vibration sensors are installed on the inner or outer frame. These sensors are connected to an electronic control device via cables. The electronic control device is connected to a display screen and a buzzer. Operators use the electronic control device to set the monitored vibration and frequency thresholds. When the vibration signal from the vibration sensor exceeds the vibration threshold, the electronic control device controls the buzzer to sound an alarm. After the staff stops the machine for inspection, they restart the automatic loading machine to prevent vibration from damaging the structure of the automatic loading machine. The frequency threshold is the number of times the vibration of the automatic loading machine exceeds the vibration threshold within a consecutive week; the frequency threshold is specified by the staff. When the number of vibrations during the operation of the automatic loading machine exceeds the frequency threshold within a consecutive week, the electronic control device controls the buzzer to sound an alarm and displays the number of vibrations exceeding the frequency threshold within a consecutive week on the display screen. The operator then rotates the adjusting nut to loosen the spring. At this time, under the tight pressure of the spring, the left end of the L-shaped plate tends to rotate downward and increases the tight pressure on the outer frame, thereby reducing the probability of resonance.

[0014] The present invention has the following advantages: After prolonged use, different structural states of the automatic loading machine require different pulley preload forces. Otherwise, the overall structure consisting of the pulleys, outer frame, and inner frame may experience severe resonance during the automatic loading machine's up-and-down movement, affecting not only its normal operation but also potentially causing structural damage. This invention adjusts the preload force between the pulleys and the outer or inner frame of the automatic loading machine's upper and lower rails. This allows the preload force to match the machine's structural state, reducing the probability of resonance and improving the accuracy and stability of the automatic loading machine's up-and-down movement.

[0015] When the automatic loading machine is working, a certain load impact phenomenon may occur. Under the action of load impact, the gap between the outer frame and the inner frame may oscillate and change. This invention uses an adaptive mechanism formed by springs, support columns, adjusting nuts and upper connecting columns to ensure that the pulley is always pressed tightly against the outer frame or inner frame during the oscillation and change of the gap between the outer frame and the inner frame, so as to avoid the load impact phenomenon causing the automatic loading machine to move up and down unstablely.

[0016] Specifically, when the impact of the load causes the installation gap (the gap between the inner and outer frames) at a certain pulley location to oscillate and decrease, the pulley is pushed, causing the left end of the L-shaped plate to rotate upwards, and the spring is compressed to accumulate more elastic potential energy. When the installation gap at that location oscillates and increases, the L-shaped plate rotates in the opposite direction under the action of the spring force, keeping the pulley in contact with the outer frame (or inner frame).

[0017] The pulleys are made of wear-resistant rubber and can be used for a long time in the up and down movement of the inner and outer frames of the automatic loading machine, increasing the service life of the upper and lower rails of the automatic loading machine.

[0018] One end of the spring is a connecting end, and the other end is a free end, which facilitates manufacturing and assembly and reduces the workload of parts assembly. The spring, together with the adjusting nut, can accommodate manufacturing and assembly errors between the inner and outer frames, preventing the inner frame from getting stuck during large vertical strokes relative to the outer frame. At the same time, it ensures that the two frames are tightly fitted by the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of this invention, reducing the possibility of resonance and increasing the accuracy and stability of vertical movement.

[0019] The preload and clearance matching adjustment method of this invention enables the adjustable tensioning mechanism to match the installation clearance and the working state of the upper and lower rails of the automatic loading machine. It promptly detects excessively high resonance frequencies, maintains contact between the pulleys and the outer frame with appropriate preload, and reduces the probability of resonance at the upper and lower rails of the automatic loading machine. Because this invention can promptly alarm and stop the machine when resonance occurs, and the vibration adjustment method further reduces the probability of resonance, this invention can significantly reduce the structural damage caused by resonance to the automatic loading machine and improve the service life of the upper and lower rails. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an existing loading machine.

[0021] Figure 2 This is a top view of the existing loading machine.

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention.

[0024] Figure 5 This is a cross-sectional structural schematic diagram of the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention.

[0025] Figure 6 yes Figure 4 The left view.

[0026] Figure 7 This is a three-dimensional structural schematic diagram of the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention from another angle. Detailed Implementation

[0028] The up, down, left, and right directions in this invention are... Figure 5 The orientation shown in the diagram is for reference only and does not represent the actual orientation used in practice.

[0029] like Figures 4 to 8 As shown, and with reference Figures 1 to 3 The adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of the present invention includes a mounting base 4, which has a groove structure with the bottom of the groove facing upward; the upper end of the mounting base 4 is used for fixed connection with the inner frame 1 or the outer frame 2. The lower end of the mounting base 4 is hinged to an L-shaped plate 6 via a hinge shaft 5. The hinge shaft 5 is connected to the corner of the L-shaped plate 6. The L-shaped plate 6 is located in the groove formed by the mounting slot and two are symmetrically arranged front and back. The L-shaped plate 6 has a left end and a top end. The left end of the L-shaped plate 6 extends to the left of the mounting base 4 and its top end is located at the rear top of the mounting base 4. A pulley 3 is connected between the left ends of the two L-shaped plates 6 through a wheel axle 7. The pulley 3 is used to press on the outer frame 2 or the inner frame 1 to form a rolling fit (one pulley 3 is connected to the outer frame 2 and the other is connected to the inner frame 1). The upper part of the mounting base 4 is fixed with a support column 8 extending in the front-to-back direction. An upper connecting column 9 is connected between the upper ends of the two L-shaped plates 6. The upper connecting column 9 is higher than the pulley 3 and is located on the same horizontal plane as the support column 8. The mounting base 4 is provided with an adjusting screw 10 extending horizontally in the left and right direction. The adjusting screw 10 slides through the support column 8 and the upper connecting column 9. The adjusting screw 10 on the right side of the upper connecting column 9 has a large end 11. The diameter of the hole on the support column 8 for sliding through the adjusting screw 10 is larger than the outer diameter of the adjusting screw 10, thus forming a movable fit between the adjusting screw 10 and the support column 8; The left end of the adjusting screw 10 has a left pressure plate 12, and a spring 13 is sleeved on the adjusting screw 10 between the left pressure plate 12 and the support column 8; under the preload of the spring 13, the large end 11 of the adjusting screw 10 presses the connecting column 9 to the left. The adjusting screw 10 on the right side of the support column 8 is threaded with an adjusting nut 14. The spring 13 is used to make the pulley 3 adapt to the change in the gap between the outer frame 2 and the inner frame 1 of the upper and lower rails of the automatic loading machine. The adjusting nut 14 is used to adjust the preload (preload) between the pulley 3 and the outer frame 2 or the inner frame 1, thereby reducing the probability of resonance.

[0030] After prolonged use, different structural states of the automatic loading machine require different preload forces for the pulleys 3. Otherwise, the overall structure consisting of the pulleys 3, the outer frame 2, and the inner frame 1 may experience severe resonance during the up-and-down movement of the automatic loading machine. This not only affects the normal operation of the automatic loading machine but may also cause structural damage. This invention adjusts the preload force between the pulleys 3 and the outer frame 2 or inner frame 1 of the upper and lower sliding rails of the automatic loading machine. This allows the preload force to match the structural state of the automatic loading machine, reducing the probability of resonance and improving the accuracy and stability of the up-and-down movement of the automatic loading machine.

[0031] When the automatic loading machine is working, a certain load impact phenomenon may occur. Under the action of load impact, the gap between the outer frame 2 and the inner frame 1 may oscillate and change. The present invention uses an adaptive mechanism formed by spring 13, support column 8, adjusting nut 14 and upper connecting column 9 to ensure that the pulley 3 is always pressed tightly on the outer frame 2 or inner frame 1 during the oscillation and change of the gap between the outer frame 2 and the inner frame 1, so as to avoid the load impact phenomenon causing the automatic loading machine to move up and down unstablely.

[0032] Specifically, when the load impact causes the installation gap (the gap between the inner frame 1 and the outer frame 2) at a certain location of pulley 3 to oscillate and become smaller, pulley 3 is pushed by the force that drives the left end of the L-shaped plate 6 to rotate upward, and spring 13 is compressed to accumulate more elastic potential energy. When the installation gap oscillates and becomes larger, under the action of the spring force of spring 13, L-shaped plate 6 rotates in the opposite direction, keeping pulley 3 in contact with the outer frame 2 (or inner frame 1).

[0033] The pulley 3 is made of wear-resistant rubber. It can be used for a long time in the up and down movement of the inner frame 1 and outer frame 2 of the automatic loading machine, increasing the working life of the upper and lower slide rails of the automatic loading machine.

[0034] One end of the spring 13 is a connecting end and the other end is a free end. The connecting end is fixedly connected to the left pressure plate 12 or the support column 8, and the free end is pressed into the support column 8 or the left pressure plate 12.

[0035] One end of the spring 13 is a connecting end and the other end is a free end, which facilitates manufacturing and assembly and reduces the workload of parts assembly. The spring 13, together with the adjusting nut 14, can accommodate manufacturing and assembly errors between the inner frame 1 and the outer frame 2, and will not be jammed during the large vertical stroke of the inner frame 1 relative to the outer frame. At the same time, the two are tightly fitted by the adjustable tensioning mechanism of the upper and lower sliding rails of the automatic loading machine of this invention, reducing the possibility of resonance and increasing the accuracy and stability of the vertical movement.

[0036] This invention also discloses a method for adjusting the preload and clearance matching using the adjustable tensioning mechanism of the upper and lower slide rails of the above-mentioned automatic loading machine. An adjustable tensioning mechanism for the upper and lower rails of the automatic loading machine is installed between the outer frame 2 and the inner frame 1 of the upper and lower rails of the automatic loading machine. The upper end of the mounting base 4 is fixed on the inner frame 1, and the pulley 3 presses on the outer frame 2. The gap between the outer frame 2 and the inner frame 1 is referred to as the installation gap; the adjustment method includes a gap adjustment method and a vibration adjustment method; The gap adjustment method is as follows: After the automatic loading machine has been used for a long time, For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the location where the installation gap increases, rotate the adjusting nut 14 to loosen it. Under the elastic force of the spring 13, the left pressure plate 12 drives the upper connecting column 9 and the upper end of the L-shaped plate 6 to rotate to the left through the large end 11 of the screw. At this time, the left end of the L-shaped plate 6 rotates downward until the pulley 3 and the outer frame 2 are in contact and have a predetermined tightness (the predetermined tightness is based on the tightness between the pulley 3 and the outer frame 2 when the automatic loading machine is first used. It can be controlled by the staff to ensure that the pulley 3 and the outer frame 2 have good contact and are not prone to resonance). For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the location where the installation gap becomes smaller, rotate the adjusting nut 14 to tighten it. Under the pressure of the left pressure plate 12, the spring 13 is further compressed, allowing the left end of the L-shaped plate 6 to rotate upward under the pressure of the outer frame 2 and the upper end of the L-shaped plate 6 to rotate to the right until the pulley 3 keeps in contact with the outer frame 2 and has a predetermined tightening force. The vibration adjustment method is as follows: a vibration sensor is installed on the inner frame 1 or the outer frame 2. The vibration sensor is connected to an electronic control device (preferably a microcontroller) via a cable. The electronic control device is connected to a display screen and a buzzer. The operator sets the vibration threshold and frequency threshold to be monitored through the electronic control device. When the vibration signal from the vibration sensor exceeds the vibration threshold, the electronic control device controls the buzzer to sound an alarm. After the staff stops the machine for inspection, they restart the automatic loading machine to prevent vibration from damaging the structure of the automatic loading machine. The frequency threshold is the number of times the vibration of the automatic loading machine exceeds (or is greater than) the vibration threshold within a consecutive week; the frequency threshold is specified by the staff; the smaller the frequency threshold, the more frequently the vibration adjustment method is implemented; the larger the frequency threshold, the greater the structural damage of the resonance phenomenon to the automatic loading machine. When the number of vibrations during the operation of the automatic loading machine exceeds the frequency threshold for a consecutive week, the electronic control device activates a buzzer alarm and displays the number of vibrations exceeding the frequency threshold for the week on the screen. The operator then loosens the spring 13 by rotating the adjusting nut 14. Under the pressure of the spring 13, the left end of the L-shaped plate 6 tends to rotate downwards, increasing the pressure on the outer frame 2, thereby reducing the probability of resonance. The operator can repeatedly change the preload of the spring 13 and measure the frequency of resonance to determine the optimal preload of the spring 13 that best matches the current operating state of the upper and lower rails of the automatic loading machine.

[0037] The preload and clearance matching adjustment method of this invention enables the adjustable tensioning mechanism to match the installation clearance and the working state of the upper and lower rails of the automatic loading machine. It promptly detects excessively high resonance frequencies, ensuring that the pulley 3 and outer frame 2 maintain contact and have appropriate preload, thus reducing the probability of resonance at the upper and lower rails of the automatic loading machine. Because this invention can promptly alarm and stop the machine when resonance occurs, and the vibration adjustment method further reduces the probability of resonance, this invention can significantly reduce the structural damage caused by resonance to the automatic loading machine and improve the service life of the upper and lower rails.

[0038] The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the present invention without departing from the spirit and scope of the present invention. Any modifications or partial substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An adjustable tensioning mechanism for the upper and lower sliding rails of an automatic loading machine, comprising a mounting base, the mounting base having a groove structure with the bottom of the groove facing upwards; the upper end of the mounting base being used for fixed connection with an inner frame or an outer frame, characterized in that: An L-shaped plate is hinged to the lower end of the mounting base via a hinge shaft. The hinge shaft is connected to the corner of the L-shaped plate. The L-shaped plate is located in the groove formed by the mounting slot and there are two L-shaped plates symmetrically arranged front and back. The L-shaped plate has a left end and a top end. The left end of the L-shaped plate extends to the left of the mounting base, and its top end is located at the rear top of the mounting base. A pulley is connected between the left ends of the two L-shaped plates through a wheel axle. The pulley is used to press against the outer frame or inner frame to form a rolling fit. The upper part of the mounting base is fixed with a support column extending in the front-to-back direction. An upper connecting column is connected between the upper ends of the two L-shaped plates. The upper connecting column is higher than the pulley and is located on the same horizontal plane as the support column. The mounting base is equipped with an adjusting screw that extends horizontally in the left and right direction. The adjusting screw slides through the support column and the upper connecting column. The adjusting screw on the right side of the upper connecting column has a large end. The diameter of the hole on the support column for sliding through the adjusting screw is larger than the outer diameter of the adjusting screw, thus forming a movable fit between the adjusting screw and the support column; The left end of the adjusting screw has a left pressure plate, and a spring is sleeved on the adjusting screw between the left pressure plate and the support column; under the preload of the spring, the large end of the adjusting screw presses tightly to the left onto the connecting column; The adjusting screw on the right side of the support column is threaded with an adjusting nut. The spring is used to make the pulley adapt to the change in the gap between the outer frame and the inner frame of the upper and lower rails of the automatic loading machine. The adjusting nut is used to adjust the preload between the pulley and the outer or inner frame to reduce the probability of resonance.

2. The adjustable tensioning mechanism for the upper and lower sliding rails of the automatic loading machine according to claim 1, characterized in that: The pulleys are made of wear-resistant rubber.

3. The adjustable tensioning mechanism for the upper and lower sliding rails of the automatic loading machine according to claim 1, characterized in that: One end of the spring is a connecting end and the other end is a free end. The connecting end is fixedly connected to the left pressure plate or support column, and the free end is pressed into the support column or left pressure plate.

4. The method for adjusting the preload and clearance matching using the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine as described in claim 1, characterized in that: An adjustable tensioning mechanism for the upper and lower rails of the automatic loading machine is installed between the outer frame and the inner frame of the upper and lower rails of the automatic loading machine. The upper end of the mounting base is fixed on the inner frame, and the pulley presses on the outer frame. The gap between the outer frame and the inner frame is called the installation gap; the adjustment method includes a gap adjustment method and a vibration adjustment method. The gap adjustment method is as follows: After the automatic loading machine has been used for a long time, For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the part where the installation gap increases, rotate the adjusting nut to loosen it. Under the action of the spring force, the left pressure plate drives the upper connecting column and the upper end of the L-shaped plate to rotate to the left through the large end of the screw. At this time, the left end of the L-shaped plate rotates downward until the pulley and the outer frame are in contact and have the predetermined tension. For the adjustable tensioning mechanism of the upper and lower slide rails of the automatic loading machine at the location where the installation gap becomes smaller, rotate the adjusting nut to tighten it. Under the pressure of the left pressure plate, the spring is further compressed, allowing the left end of the L-shaped plate to rotate upward under the pressure of the outer frame and the upper end of the L-shaped plate to rotate to the right until the pulley and the outer frame are in contact and have a predetermined tightening force. The vibration adjustment method is as follows: Vibration sensors are installed on the inner or outer frame. These sensors are connected to an electronic control device via cables. The electronic control device is connected to a display screen and a buzzer. Operators use the electronic control device to set the monitored vibration and frequency thresholds. When the vibration signal from the vibration sensor exceeds the vibration threshold, the electronic control device controls the buzzer to sound an alarm. After the staff stops the machine for inspection, they restart the automatic loading machine to prevent vibration from damaging the structure of the automatic loading machine. The frequency threshold is the number of times the vibration of the automatic loading machine exceeds the vibration threshold within a consecutive week; the frequency threshold is specified by the staff. When the number of vibrations during the operation of the automatic loading machine exceeds the frequency threshold within a consecutive week, the electronic control device controls the buzzer to sound an alarm and displays the number of vibrations exceeding the frequency threshold within a consecutive week on the display screen. The operator then rotates the adjusting nut to loosen the spring. At this time, under the tight pressure of the spring, the left end of the L-shaped plate tends to rotate downward and increases the tight pressure on the outer frame, thereby reducing the probability of resonance.

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