Self-moving belt conveyor with buffer adjusting mechanism

Abstract

The invention relates to the technical field of belt conveyors, in particular to a self-moving belt conveyor with a buffer adjusting mechanism, which comprises a belt conveyor main body, support frames are mounted at two ends of the belt conveyor main body, a buffer base for buffering the support frames is arranged below the input end of the belt conveyor main body, and the buffer base comprises a bottom plate; vertical frame plates are arranged on the two sides of the bottom plate, a main buffering unit and at least one auxiliary buffering unit are installed between the vertical frame plates, and the auxiliary buffering units are installed on the vertical frame plates in a sliding mode and move in the vertical direction. And the main buffer unit and the auxiliary buffer units are each provided with a detection unit, and the detection units detect the displacement range of the buffer base plate in the vertical direction. The detection unit can adjust the buffering force on the belt conveyor body according to the weight of goods.

Description

Technical Field

[0001] The invention relates to the technical field of belt conveyors, and in particular to a self-moving belt conveyor with a buffer adjustment mechanism. Background Art

[0002] At present, belt conveyor is the abbreviation of belt conveyor, which is available in fixed and mobile types, with simple structure and high efficiency. The falling materials are transported to the designated location by the belt conveyor. Due to the large drop between the belt conveyor and the unloading device, the material falls on the input end of the belt conveyor and generates impact, which will cause damage to the belt. Therefore, it is necessary to install a shock-absorbing buffer device at the impacted part of the belt conveyor.

[0003] Chinese patent CN220519255U discloses a movable belt conveyor buffer device, including a manual winch, a twisting rope, an elastic buffer mechanism and a track. The device places the elastic buffer mechanism on the track between the upper and lower belt surfaces of the belt conveyor to provide tight buffering for the impact on the belt conveyor, but the buffering capacity is fixed. When the impact on the belt conveyor is greater than the buffering range of the buffer device, the buffer device and the belt conveyor may be damaged. Summary of the invention

[0004] In view of the above problems, it is necessary to provide a self-moving belt conveyor with a buffer adjustment mechanism to solve the problems in the prior art.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is as follows: a self-moving belt conveyor with a buffer adjustment mechanism, comprising a belt conveyor body, support frames are installed at both ends of the belt conveyor body, a buffer base for buffering the support frame is arranged below the input end of the belt conveyor body, the buffer base comprises a bottom plate, vertical frame plates are arranged on both sides of the bottom plate, a main buffer unit and at least one auxiliary buffer unit are installed between the vertical frame plates, the working end of the main buffer unit is in contact with the bottom of the support frame to buffer the vibration of the belt conveyor body, and the auxiliary buffer unit is slidably installed on the vertical frame plate and moves in the vertical direction; the main buffer unit and The auxiliary buffer units all include a horizontally extending mounting plate and a plurality of elastic pistons mounted on the mounting plate. The top ends of the elastic pistons are fixedly connected to the bottom sides of the buffer pads. The main buffer unit and the auxiliary buffer unit are both provided with detection units. The detection units detect the displacement range of the buffer pads in the vertical direction. The buffer base is provided with a first linear drive for driving the auxiliary buffer unit to move upward. After the detection unit detects that the buffer pad of the main buffer unit has descended more than a set distance, the first linear drive is started through a controller. The first linear drive drives the next auxiliary buffer unit to move upward to a support frame where the buffer pad of the auxiliary buffer unit is attached to the main body of the belt conveyor.

[0006] Preferably, the detection unit includes limit blocks arranged at both ends of each buffer pad, the limit blocks are inserted in limit holes arranged on the vertical frame plate, the width of the limit holes is the same as the width of the limit blocks, and the limit holes extend in the vertical direction; an insertion rod extending vertically downward is arranged below the limit block, and a limit head with a diameter larger than the insertion rod is coaxially arranged at the bottom of the insertion rod, and the auxiliary buffer unit also includes a sliding block slidably installed on the outer side of the vertical frame plate, a guide sleeve is arranged on the sliding block, the limit head is inserted in the guide sleeve, the inner diameter of the top opening of the guide sleeve is the same as the diameter of the insertion rod, and the inner diameter of the guide sleeve is the same as the diameter of the limit head; a sensor is fixedly installed on the sliding block below the guide sleeve, and the working end of the sensor is arranged to face upward, and the sensor is used to detect the straight-line distance between the limit head and the sensor, and the sensor signal is connected to the first linear driver.

[0007] Preferably, a lower blocking block is fixedly mounted on the bottom of the guide sleeve, a through hole is provided on the lower blocking block, the axis of the through hole is in the same straight line as the axis of the limit head, and the inner diameter of the through hole is smaller than the diameter of the limit head.

[0008] Preferably, guide rods extending vertically downward are provided at both ends below each mounting plate, and the guide rods are inserted into guide cylinders provided on the bottom plate; the top of the guide cylinder below the mounting plate of the main buffer unit is higher than the guide cylinder below the auxiliary buffer unit, and when the mounting plate of the main buffer unit is in contact with the top of the guide cylinder, the buffer pad of the main buffer unit is in contact with the support frame; a lower support slider is slidably installed on the buffer base, and the lower support slider is located between the guide cylinders on both sides and moves horizontally along the arrangement direction of the main buffer unit and the auxiliary buffer unit, and the top of the lower support slider is on the same horizontal plane as the top of the guide cylinder below the main buffer unit.

[0009] Preferably, the first linear drive is fixedly mounted on one side of the guide cylinder below the auxiliary buffer unit, the first linear drive is located on one side of the moving path of the lower supporting slider, the working end of the first linear drive is arranged to move in the vertical direction, and the first linear drive pushes the mounting plate of the auxiliary buffer unit up to a horizontal height not lower than the mounting plate of the main buffer unit.

[0010] Preferably, side supporting sliders are provided on both sides of the lower supporting slider, and the lower supporting slider and the side supporting slider are fixedly connected by horizontally extending connecting pieces; the side supporting sliders are slidably installed on the outer side of the vertical frame plate, and the top of the side supporting slider is in contact with the bottom of the sliding block on the main buffer unit.

[0011] Preferably, at least one horizontally extending plug plate is provided at one end of the lower supporting slider away from the auxiliary buffer unit, and a fixed block is fixedly installed on the base plate located at the end of the first linear drive away from the auxiliary buffer unit, and the plug plate is inserted on the fixed block; a horizontally extending extension rod is also provided at one end of the lower supporting slider away from the auxiliary buffer unit, the extension rod is inserted on the fixed block and extends to the end of the fixed block away from the lower supporting slider, and a spring is sleeved on the extension rod, which elastically connects the lower supporting slider and the fixed block, and the elastic force of the spring causes the lower supporting slider to move toward the side of the auxiliary buffer unit.

[0012] Preferably, the extension rod extends to the fixed block and a connecting plate is fixedly installed at one end away from the lower supporting slider, and the connecting plate extends vertically downward to the bottom of the base plate; support feet for suspending the base plate are arranged on both sides below the base plate, and a second linear drive is fixedly installed below the base plate, and the working end of the second linear drive is arranged to move in the horizontal direction, and the second linear drive is in contact with the connecting plate to push the lower supporting slider toward the fixed block.

[0013] Compared with the prior art, the present invention has the following beneficial effects: Firstly, the present invention provides a sustainably increasing buffering force to the support frame at one end of the belt conveyor body through a main buffer unit and a plurality of auxiliary buffer units, and adjusts the buffering force according to the weight of the goods to prevent the impact force of the goods on the belt conveyor body from exceeding the buffering range of the main buffer unit and causing damage to the structure of the belt conveyor body, the buffer base and the main buffer unit, thereby improving the protection capability of the equipment.

[0014] Secondly, the present invention monitors the vertical movement distance of the buffer pad through the detection unit. When it is monitored that the downward movement of the buffer pad exceeds the set value, it can be determined that the impact force of the goods on the belt conveyor body exceeds a certain value, thereby increasing the number of auxiliary buffer units, automatically improving the buffering capacity of the belt conveyor body, and protecting the equipment without manual debugging.

[0015] Thirdly, the lower supporting slider slidably installed on the buffer base in the present invention can be moved to the bottom of the mounting plate of the main buffer unit, and the bottom of the mounting plate fits the upper side of the lower supporting slider so that the lower supporting slider supports the mounting plate of the main buffer unit. When the mounting plate of the auxiliary buffer unit is lifted by the first linear drive, the lower supporting slider can quickly slide to the bottom of the mounting plate of the auxiliary buffer unit under the elastic force of the spring, and at the same time support the mounting plates of the main buffer unit and the auxiliary buffer unit, thereby ensuring the buffering effect of the main buffer unit and the auxiliary buffer unit on the support frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a self-moving belt conveyor with a buffer adjustment mechanism; Figure 2 It is a side view of a self-moving belt conveyor with a buffer adjustment mechanism; Figure 3 yes Figure 2 A cross-sectional view at AA of FIG. Figure 4 It is a three-dimensional diagram of a self-moving belt conveyor with a buffer adjustment mechanism without the main body of the belt conveyor; Figure 5 yes Figure 4 A partial enlarged view of point B; Figure 6 It is a front view of a self-moving belt conveyor with a buffer adjustment mechanism after removing the main body of the belt conveyor; Figure 7 yes Figure 6 A cross-sectional view of the section at CC; Figure 8 yes Figure 7 A partial enlarged view of point D; Fig. 9 It is a self-moving belt conveyor with a buffer adjustment mechanism. The three-dimensional structure after removing the belt conveyor body is decomposed. Figure 1 ; Fig.10 It is a self-moving belt conveyor with a buffer adjustment mechanism. The three-dimensional structure after removing the belt conveyor body is decomposed. Figure 2 .

[0017] The numbers in the figure are: 1. belt conveyor body; 11. support frame; 2. buffer base; 21. bottom plate; 211. guide cylinder; 212. support foot; 22. vertical frame plate; 221. limit hole; 23. first linear drive; 24. lower support slider; 241. plug plate; 242. extension rod; 243. spring; 244. connecting plate; 245. second linear drive; 25. side support slider; 251. connector; 26. fixing block; 3. main buffer unit; 31. mounting plate; 311. guide rod; 32. elastic piston; 33. buffer pad; 4. auxiliary buffer unit; 41. detection unit; 411. limit block; 412. plug rod; 413. limit head; 414. sliding block; 415. guide sleeve; 416. sensor; 417. lower blocking block; 418. through hole. DETAILED DESCRIPTION

[0018] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figures 1 to 10 : A self-moving belt conveyor with a buffer adjustment mechanism comprises a belt conveyor body 1, support frames 11 are installed at both ends of the belt conveyor body 1, a buffer base 2 for buffering the support frame 11 is arranged below the input end of the belt conveyor body 1, the buffer base 2 comprises a bottom plate 21, vertical vertical frame plates 22 are arranged on both sides of the bottom plate 21, a main buffer unit 3 and at least one auxiliary buffer unit 4 are installed between the vertical frame plates 22, the working end of the main buffer unit 3 is in contact with the bottom of the support frame 11 to buffer the vibration of the belt conveyor body 1, and the auxiliary buffer unit 4 is slidably installed on the vertical frame plate 22 and moves in the vertical direction; the main buffer unit 3 and the auxiliary buffer unit 4 both include a horizontally extending mounting plate 3 1, and a plurality of elastic pistons 32 mounted on the mounting plate 31, the top ends of the elastic pistons 32 are fixedly connected to the bottom sides of the buffer pads 33, the main buffer unit 3 and the auxiliary buffer unit 4 are both provided with detection units 41, the detection units 41 detect the displacement range of the buffer pads 33 in the vertical direction, the buffer base 2 is provided with a first linear drive 23 for driving the auxiliary buffer unit 4 to move upward, the detection unit 41 detects that the buffer pad 33 of the main buffer unit 3 drops more than a set distance and then starts the first linear drive 23 through a controller, the first linear drive 23 drives the next auxiliary buffer unit 4 to move upward until the buffer pad 33 of the auxiliary buffer unit 4 is in contact with the support frame 11 of the belt conveyor body 1.

[0020] The support frames 11 are installed at both ends of the belt conveyor body 1 in the present invention. The impact of the goods falling on the input end of the belt conveyor body 1 on the belt conveyor body 1 is buffered by the buffer base 2 supporting the support frame 11 and the main buffer unit 3 on the buffer base 2. In this embodiment, a main buffer unit 3 is arranged on the buffer base 2, and a plurality of elastic pistons 32 are arranged on the mounting plate 31 of the main buffer unit 3. The top ends of the elastic pistons 32 are connected to the bottom of the buffer pad 33. The buffer pad 33 fits on the bottom of the support frame 11 under the elastic force of the elastic piston 32. The impact of the goods on the belt conveyor body 1 causes the elastic piston 32 of the main buffer unit 3 to expand and contract to buffer the impact. The elastic piston 32 in this embodiment can provide elastic force through a spring, or it can be an air piston or other existing technologies, which will not be described in detail here. A plurality of auxiliary buffer units 4 are also arranged on the buffer base 2, and the number of auxiliary buffer units 4 can be increased according to actual needs. The structure of the auxiliary buffer unit 4 is the same as that of the main buffer unit 3. The auxiliary buffer unit 4 is in a non-working state. The lower part is in a position lower than the main buffer unit 3, and only the buffer pad 33 of the main buffer unit 3 is kept in contact with the support frame 11. When the goods cause an impact on the belt conveyor body 1, the impact force presses the buffer pad 33 downward so that the buffer pad 33 compresses the elastic piston 32 and then moves downward. The detection unit 41 arranged on the main buffer unit 3 monitors the vertical movement distance of the buffer pad 33. When it is detected that the downward movement of the buffer pad 33 exceeds the set value, it can be determined that the impact force of the goods on the belt conveyor body 1 exceeds a certain value. At this time, the detection unit 41 on the main buffer unit 3 sends a signal to the controller, and the controller controls the first linear drive 23 under the sub-buffer unit 4 to start, and lift the sub-buffer unit 4 to a position flush with the main buffer unit 3. The sub-buffer unit 4 and the main buffer unit 3 together provide buffering for the support frame 11 to improve the ability to resist the impact of goods. Similarly, after the impact of the goods on the belt conveyor body 1 exceeds the main buffer unit 3 and a single sub-buffer unit 4, the subsequent sub-buffer units 4 can be successively lifted to contact with the support frame 11. In this embodiment, a main buffer unit 3 and multiple sub-buffer units 4 are used to provide a sustainably increasing buffering force to the support frame 11 at one end of the belt conveyor body 1. The buffering force is adjusted according to the weight of the goods to prevent the impact force of the goods on the belt conveyor body 1 from exceeding the buffering range of the main buffer unit 3, thereby preventing damage to the structures of the belt conveyor body 1, the buffer base 2 and the main buffer unit 3, thereby improving the protection capability of the equipment.

[0021] In order to solve the problem of how the detection unit 41 monitors the vertical movement range of the buffer pads 33 of the main buffer unit 3 and the auxiliary buffer unit 4, the following features are specifically set: The detection unit 41 includes a limit block 411 arranged at both ends of each buffer pad 33, the limit block 411 is inserted into the limit hole 221 set on the vertical frame plate 22, the width of the limit hole 221 is the same as the width of the limit block 411, and the limit hole 221 extends in the vertical direction; a plug rod 412 extending vertically downward is arranged below the limit block 411, and a limit head 413 with a diameter larger than the plug rod 412 is coaxially arranged at the bottom of the plug rod 412, and the auxiliary buffer unit 4 also includes a sliding block 414 slidably installed on the outer side of the vertical frame plate 22, A guide sleeve 415 is provided on the sliding block 414, and the limit head 413 is inserted in the guide sleeve 415. The inner diameter of the top opening of the guide sleeve 415 is the same as the diameter of the insertion rod 412, and the inner diameter of the guide sleeve 415 is the same as the diameter of the limit head 413; the sliding block 414 is located below the guide sleeve 415 and a sensor 416 is fixedly installed thereon, and the working end of the sensor 416 is set upwards. The sensor 416 is used to detect the straight-line distance between the limit head 413 and the sensor 416, and the sensor 416 signal is connected to the first linear driver 23.

[0022] In this embodiment, both sides of the buffer pad 33 of the main buffer unit 3 and the auxiliary buffer unit 4 are equipped with limit blocks 411, and the limit blocks 411 are limited in movement in the limit holes 221 of the vertical frame plate 22. The insertion rod 412 arranged on the limit block 411 is inserted into the guide sleeve 415 arranged on the sliding block 414 slidably installed on the vertical frame plate 22, and the limit head 413 at the bottom end of the insertion rod 412 is limited in movement in the guide sleeve 415. Since the inner diameter of the top opening of the guide sleeve 415 is the same as the diameter of the insertion rod 412, and the inner diameter of the guide sleeve 415 is the same as the diameter of the limit head 413, the sliding block 414 is hung under the insertion rod 412 under the action of gravity, and the sensor 416 on the sliding block 414 is connected to the guide sleeve 415. The limit head 413 in the sleeve 415 is monitored. At this time, the straight-line distance between the limit head 413 and the sensor 416 is the maximum distance. When the position of the sliding block 414 is fixed, when the buffer pad 33 buffers the support frame 11, the downward movement of the buffer pad 33 in the vertical direction will drive the limit block 411, the insertion rod 412 and the limit head 413 to move downward, and the straight-line distance between the limit head 413 and the sensor 416 is shortened. When the straight-line distance between the limit head 413 and the sensor 416 is less than the set value, the sensor 416 can send a signal to the controller, and the controller starts the first linear drive 23 to lift the subsequent sub-buffer unit 4. The sensor 416 in this embodiment can be a ranging sensor.

[0023] In order to solve the problem of how to prevent the buffer pad 33 from moving downward too far and causing the limit head 413 to hit the sensor 416, the following features are specifically set: A lower blocking block 417 is fixedly mounted on the bottom of the guide sleeve 415 . A through hole 418 is provided on the lower blocking block 417 . The axis of the through hole 418 is in the same straight line as the axis of the limiting head 413 . The inner diameter of the through hole 418 is smaller than the diameter of the limiting head 413 .

[0024] A lower blocking block 417 is installed below the guide sleeve 415 in this embodiment. The working end of the sensor 416 monitors the position of the limit head 413 through the through hole 418 on the lower blocking block 417. Since the inner diameter of the through hole 418 is smaller than the diameter of the limit head 413, when the limit head 413 moves down to fit the lower blocking block 417, it cannot move further down, and will not cause damage to the sensor 416 below the guide sleeve 415, thereby ensuring the safety of the sensor 416.

[0025] In order to solve the problem of how to fix the position of the mounting plate 31 of the auxiliary buffer unit 4 after lifting, the following features are specifically set: Guide rods 311 extending vertically downward are provided at both ends below each mounting plate 31, and the guide rods 311 are inserted into guide cylinders 211 provided on the base plate 21; the top of the guide cylinder 211 below the mounting plate 31 of the main buffer unit 3 is higher than the guide cylinder 211 below the auxiliary buffer unit 4, and when the mounting plate 31 of the main buffer unit 3 fits against the top of the guide cylinder 211, the buffer pad 33 of the main buffer unit 3 fits against the support frame 11; a lower support slider 24 is slidably installed on the buffer base 2, and the lower support slider 24 is located between the guide cylinders 211 on both sides and moves horizontally along the arrangement direction of the main buffer unit 3 and the auxiliary buffer unit 4, and the top of the lower support slider 24 is on the same horizontal plane as the top of the guide cylinder 211 below the main buffer unit 3.

[0026] In this embodiment, a plurality of guide rods 311 are arranged below the mounting plates 31 of the main buffer unit 3 and the auxiliary buffer unit 4. The guide rods 311 are inserted into the guide cylinders 211 arranged on the bottom plate 21 to guide the movement of the mounting plate 31, so as to ensure that the mounting plate 31 can only move in the vertical direction. The top of the guide cylinder 211 below the mounting plate 31 of the main buffer unit 3 is higher than the guide cylinder 211 below the auxiliary buffer unit 4. The mounting plate 31 of the main buffer unit 3 is attached to the top of the guide cylinder 211 to keep the main buffer unit 3 in a high position, and the buffer pad 33 of the main buffer unit 3 is in contact with the bottom of the support frame 11. When the mounting plate 31 of the auxiliary buffer unit 4 is attached to the guide cylinder 211, the buffer pad 33 of the auxiliary buffer unit 4 does not contact the support frame 11 contact, to realize the independent buffering state of the main buffer unit 3, the lower supporting slider 24 slidably installed on the buffer base 2 can be moved to the bottom of the mounting plate 31 of the main buffer unit 3, the bottom of the mounting plate 31 is fitted with the upper side of the lower supporting slider 24 so that the lower supporting slider 24 supports the mounting plate 31 of the main buffer unit 3, the mounting plate 31 of the auxiliary buffer unit 4 is positioned lower, to block the lower supporting slider 24, when the mounting plate 31 of the auxiliary buffer unit 4 is lifted by the first linear drive 23, the lower supporting slider 24 can slide to the bottom of the mounting plate 31 of the auxiliary buffer unit 4, to support the mounting plates 31 of the main buffer unit 3 and the auxiliary buffer unit 4, to ensure the buffering effect of the main buffer unit 3 and the auxiliary buffer unit 4 on the support frame 11.

[0027] In order to solve the problem of how the first linear drive 23 drives the auxiliary buffer unit 4 to move upward, the following features are specifically set: The first linear drive 23 is fixedly mounted on one side of the guide cylinder 211 below the auxiliary buffer unit 4. The first linear drive 23 is located on one side of the moving path of the lower supporting slider 24. The working end of the first linear drive 23 is arranged to move in the vertical direction. The first linear drive 23 pushes the mounting plate 31 of the auxiliary buffer unit 4 to move up to a horizontal height not lower than the mounting plate 31 of the main buffer unit 3.

[0028] The first linear drive 23 in this embodiment can be a cylinder or an electric push rod, etc. The first linear drive 23 is located on one side of the moving path of the lower supporting slider 24. Therefore, the movement of the lower supporting slider 24 will not contact the first linear drive 23. The working end of the first linear drive 23 moves in the vertical direction and pushes the mounting plate 31 of the sub-buffer unit 4 to move upward, and automatically resets after the lower supporting slider 24 moves to the bottom of the mounting plate 31, thereby avoiding impact on the first linear drive 23 and protecting the first linear drive 23.

[0029] In order to solve the problem of how to fix the position of the sliding block 414 of the detection unit 41, the following features are specifically set: Side supporting sliders 25 are arranged on both sides of the lower supporting slider 24, and the lower supporting slider 24 and the side supporting slider 25 are fixedly connected by a horizontally extending connecting piece 251; the side supporting slider 25 is slidably installed on the outer side of the vertical frame plate 22, and the top of the side supporting slider 25 is in contact with the bottom of the sliding block 414 on the main buffer unit 3.

[0030] The lower supporting slider 24 in this embodiment is connected to the side supporting slider 25 on both sides through the connecting piece 251. The side supporting slider 25 is located on the outer side of the vertical frame plate 22 and moves horizontally. The side supporting slider 25 is located below the sliding block 414 of the detection unit 41 connected to the buffer pad 33 of the main buffer unit 3 to support the bottom of the sliding block 414 to ensure that the position of the sensor 416 is fixed. Therefore, when the buffer pad 33 moves and drives the limit head 413 to move, the sensor 416 can detect the position change of the limit head 413. When the auxiliary buffer unit 4 moves up, the buffer pad 33 drives the limit block 411 to move up, and the limit block 411 pulls the sliding block 414 up through the insertion rod 412 and the limit head 413. When the sliding block 414 moves up to above the upper surface of the side supporting slider 25, the side supporting slider 25 follows the lower supporting slider 24 and moves horizontally to below the sliding block 414 of the auxiliary buffer unit 4 to support the sliding block 414, and the detection unit 41 of the auxiliary buffer unit 4 is detected normally.

[0031] In order to solve the problem of how to drive the lower support slider 24 to quickly move to the bottom of the lifted auxiliary buffer unit 4, the following features are specifically set: At least one horizontally extending plug plate 241 is provided at one end of the lower supporting slider 24 away from the auxiliary buffer unit 4, and a fixing block 26 is fixedly installed at one end of the base plate 21 located at the first linear drive 23 away from the auxiliary buffer unit 4, and the plug plate 241 is inserted on the fixing block 26; a horizontally extending extension rod 242 is also provided at one end of the lower supporting slider 24 away from the auxiliary buffer unit 4, the extension rod 242 is inserted on the fixing block 26 and extends to the end of the fixing block 26 away from the lower supporting slider 24, and a spring 243 is sleeved on the extension rod 242, and the spring 243 elastically connects the lower supporting slider 24 and the fixing block 26, and the elastic force of the spring 243 causes the lower supporting slider 24 to move toward the side of the auxiliary buffer unit 4.

[0032] The lower supporting slider 24 in this embodiment is inserted on the fixed block 26 through the insert plate 241 and the extension rod 242 to ensure that the moving path of the lower supporting slider 24 is stable. A spring 243 is sleeved on the extension rod 242. The lower supporting slider 24 moves toward the side of the sub-buffer unit 4 under the elastic force of the spring 243, but is blocked by the mounting plate 31 of the sub-buffer unit 4 in the initial position. When the first linear drive 23 drives the sub-buffer unit 4 to lift, the mounting plate 31 is located on the upper side of the lower supporting slider 24. The lower supporting slider 24 can move quickly to fit with the mounting plate 31 of the next sub-buffer unit 4 under the elastic force of the spring 243, and support the mounting plate 31 of the sub-buffer unit 4 after lifting.

[0033] In order to solve the problem of how to drive the lower support slider 24 to reset so that the auxiliary buffer unit 4 can be reset, the following features are specifically set: The extension rod 242 extends to the fixed block 26, and a connecting plate 244 is fixedly installed at one end away from the lower supporting slider 24. The connecting plate 244 extends vertically downward to the bottom of the base plate 21; support feet 212 for suspending the base plate 21 are arranged on both sides below the base plate 21, and a second linear drive 245 is fixedly installed below the base plate 21. The working end of the second linear drive 245 is arranged to move in the horizontal direction. The second linear drive 245 is in contact with the connecting plate 244 to push the lower supporting slider 24 toward the fixed block 26.

[0034] In this embodiment, a support leg 212 is set under the base plate 21, and the support leg 212 overhead allows the second linear actuator 245 to be installed under the base plate 21. The second linear actuator 245 can be a cylinder or an electric push rod, etc. The working end of the second linear actuator 245 can contact the connecting plate 244 installed on the end of the extension rod 242 away from the lower supporting slider 24. The second linear actuator 245 pushes the connecting plate 244 to drive the compression spring 243 of the lower supporting slider 24 to move to the side away from the secondary buffer unit 4, so that the lower supporting slider 24 is separated from the bottom of the mounting plate 31 of the secondary buffer unit 4, and the side supporting slider 25 is separated from the bottom of the sliding block 414 of the secondary buffer unit 4. The secondary buffer unit 4 can move to the top end of the fitting guide cylinder 211 under the action of gravity for reset. After the reset of the lower supporting slider 24 is completed, the working end of the second linear actuator 245 can be reset, thereby reducing the pressure on the second linear actuator 245 and ensuring the working life of the second linear actuator 245.

[0035] Working principle: The impact of the goods on the belt conveyor body 1 causes the elastic piston 32 of the main buffer unit 3 to expand and contract to buffer the impact. The sub-buffer unit 4 is in a position lower than the main buffer unit 3 in the non-working state, and only keeps the buffer pad 33 of the main buffer unit 3 in contact with the support frame 11. When the goods cause an impact on the belt conveyor body 1, the impact force presses the buffer pad 33 downward, causing the buffer pad 33 to compress the elastic piston 32 and then move downward. The detection unit 41 set on the main buffer unit 3 monitors the vertical movement distance of the buffer pad 33. When it is detected that the downward movement of the buffer pad 33 exceeds the set value, it can be determined that the impact force of the goods on the belt conveyor body 1 exceeds a certain value. At this time, the detection unit 41 on the main buffer unit 3 sends a signal to the controller, and the controller controls the first linear drive 23 under the sub-buffer unit 4 to start, and lift the sub-buffer unit 4 to a position flush with the main buffer unit 3. The sub-buffer unit 4 and the main buffer unit 3 together provide buffering for the support frame 11.

[0036] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A self-moving belt conveyor with a buffer adjustment mechanism, comprising a belt conveyor body (1), support frames (11) being installed at both ends of the belt conveyor body (1), and a buffer base (2) for buffering the support frame (11) being arranged below the input end of the belt conveyor body (1), characterized in that: The buffer base (2) comprises a bottom plate (21), vertical frames (22) are arranged on both sides of the bottom plate (21), a main buffer unit (3) and at least one auxiliary buffer unit (4) are installed between the vertical frames (22), the working end of the main buffer unit (3) is in contact with the bottom of the support frame (11) to buffer the vibration of the belt conveyor body (1), and the auxiliary buffer unit (4) is slidably installed on the vertical frames (22) and moves in the vertical direction; The main buffer unit (3) and the auxiliary buffer unit (4) both comprise a horizontally extending mounting plate (31) and a plurality of elastic pistons (32) mounted on the mounting plate (31), the top ends of the elastic pistons (32) being fixedly connected to the bottom sides of the buffer pads (33), the main buffer unit (3) and the auxiliary buffer unit (4) being both provided with detection units (41), the detection units (41) detecting the displacement range of the buffer pads (33) in the vertical direction, the buffer base (2) being provided with a first linear drive (23) for driving the auxiliary buffer unit (4) to move upward, the detection unit (41) detecting that the buffer pad (33) of the main buffer unit (3) has descended beyond a set distance, and then starting the first linear drive (23) through a controller, the first linear drive (23) driving the next auxiliary buffer unit (4) to move upward to a support frame (11) where the buffer pad (33) of the auxiliary buffer unit (4) is in contact with the belt conveyor body (1).

2. A self-moving belt conveyor with a buffer adjustment mechanism according to claim 1, characterized in that: The detection unit (41) comprises limit blocks (411) arranged at both ends of each buffer pad (33), the limit blocks (411) being inserted into limit holes (221) arranged on the vertical frame plate (22), the width of the limit holes (221) being the same as the width of the limit blocks (411), and the limit holes (221) extending in the vertical direction; A plunger (412) extending vertically downward is arranged below the limit block (411), and a limit head (413) having a diameter greater than that of the plunger (412) is coaxially arranged at the bottom of the plunger (412). The auxiliary buffer unit (4) further comprises a sliding block (414) slidably mounted on the outside of the vertical frame plate (22), a guide sleeve (415) is arranged on the sliding block (414), and the limit head (413) is inserted into the guide sleeve (415). The inner diameter of the top opening of the guide sleeve (415) is the same as the diameter of the plunger (412), and the inner diameter of the guide sleeve (415) is the same as the diameter of the limit head (413); The sliding block (414) is located below the guide sleeve (415) and is fixedly mounted with a sensor (416). The working end of the sensor (416) is arranged to face upward. The sensor (416) is used to detect the linear distance between the limit head (413) and the sensor (416). The sensor (416) signal is connected to the first linear drive (23).

3. A self-moving belt conveyor with a buffer adjustment mechanism according to claim 2, characterized in that: A lower blocking block (417) is fixedly mounted on the bottom of the guide sleeve (415), and a through hole (418) is provided on the lower blocking block (417). The axis of the through hole (418) and the axis of the limit head (413) are on the same straight line, and the inner diameter of the through hole (418) is smaller than the diameter of the limit head (413).

4. A self-moving belt conveyor with a buffer adjustment mechanism according to claim 2, characterized in that: Both ends of the lower side of each mounting plate (31) are provided with guide rods (311) extending vertically downward, and the guide rods (311) are inserted into guide cylinders (211) provided on the bottom plate (21); The top end of the guide cylinder (211) located below the mounting plate (31) of the main buffer unit (3) is higher than the guide cylinder (211) located below the auxiliary buffer unit (4); when the mounting plate (31) of the main buffer unit (3) fits the top end of the guide cylinder (211), the buffer pad (33) of the main buffer unit (3) fits the support frame (11); A lower support slider (24) is slidably mounted on the buffer base (2); the lower support slider (24) is located between the guide cylinders (211) on both sides and moves horizontally along the arrangement direction of the main buffer unit (3) and the auxiliary buffer unit (4); the top of the lower support slider (24) is on the same horizontal plane as the top of the guide cylinder (211) below the main buffer unit (3).

5. A self-moving belt conveyor with a buffer adjustment mechanism according to claim 4, characterized in that: The first linear drive (23) is fixedly mounted on one side of a guide cylinder (211) located below the auxiliary buffer unit (4); the first linear drive (23) is located on one side of a moving path of the lower supporting slider (24); a working end of the first linear drive (23) is arranged to move in a vertical direction; the first linear drive (23) pushes the mounting plate (31) of the auxiliary buffer unit (4) to move upward to a level not lower than that of the mounting plate (31) of the main buffer unit (3).

6. The self-moving belt conveyor with a buffer adjustment mechanism according to claim 4, characterized in that: Side supporting sliders (25) are provided on both sides of the lower supporting slider (24), and the lower supporting slider (24) and the side supporting slider (25) are fixedly connected via a horizontally extending connecting piece (251); The side support slider (25) is slidably mounted on the outer side of the vertical frame plate (22), and the top of the side support slider (25) is in contact with the bottom of the sliding block (414) on the main buffer unit (3).

7. A self-moving belt conveyor with a buffer adjustment mechanism according to claim 6, characterized in that: At least one horizontally extending plug plate (241) is provided at one end of the lower supporting slide block (24) away from the auxiliary buffer unit (4); a fixing block (26) is fixedly mounted on one end of the bottom plate (21) located at the first linear drive (23) away from the auxiliary buffer unit (4); and the plug plate (241) is inserted into the fixing block (26); An extension rod (242) extending horizontally is also provided at one end of the lower supporting slider (24) away from the auxiliary buffer unit (4); the extension rod (242) is inserted into the fixed block (26) and extends to one end of the fixed block (26) away from the lower supporting slider (24); a spring (243) is sleeved on the extension rod (242); the spring (243) elastically connects the lower supporting slider (24) and the fixed block (26); the elastic force of the spring (243) causes the lower supporting slider (24) to move toward the side of the auxiliary buffer unit (4).

8. The self-moving belt conveyor with a buffer adjustment mechanism according to claim 6, characterized in that: The extension rod (242) extends to the end of the fixed block (26) away from the lower supporting slider (24), and a connecting plate (244) is fixedly mounted thereon. The connecting plate (244) extends vertically downward to below the bottom plate (21); Support legs (212) for suspending the bottom plate (21) are arranged on both sides below the bottom plate (21), and a second linear drive (245) is fixedly installed below the bottom plate (21). The working end of the second linear drive (245) is arranged to move in a horizontal direction. The second linear drive (245) is in contact with the connecting plate (244) to push the lower supporting slide block (24) toward the fixed block (26).

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