Heavy power and free chain conveying device

Abstract

The invention relates to the technical field of conveying devices, in particular to a heavy power and free chain conveying device which comprises a conveying track and a power and free trolley, a stop block is arranged on the conveying track, and the stop block has an extending state and a retracting state; the power and free trolley comprises a trolley body, a lifting claw and a crank arm; a first roller and a second roller are rotationally arranged on the trolley body, and both the first roller and the second roller can roll along the conveying track; the lifting claw is located between the first roller and the second roller, a rack is hinged to the lifting claw, a second gear is coaxially arranged on the second roller, and the rack can be meshed with the second gear; the crank arm is hinged to the trolley body, one end of the crank arm is in sliding connection with the lifting claw, and the other end of the crank arm is used for being matched with the stop block; when the accumulation trolley is accumulated forwards, the second gear is locked, so that the accumulation trolley can be prevented from sliding due to inclination of the conveying track, and normal conveying of the accumulation trolley is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveying devices, in particular to a heavy-duty accumulation chain conveying device. BACKGROUND

[0002] The accumulation chain, also known as the accumulation type conveying chain, is an intelligent, efficient and flexible automated conveying equipment, which is widely used in production lines of various industries. The accumulation chain drives the chain to run through the driving device, and transports the workpieces from one process to the next process.

[0003] The patent document with the announcement number CN215665565U discloses a general front trolley of accumulation chain, which includes a trolley body, a lifting claw slidingly connected to the top of the inside of the trolley body, and a chain push head on the accumulation chain, which can push the lifting claw. The lifting claw can be lifted up and down in the trolley body, so as to realize the unhooking of the trolley, and then the trolley can realize the accumulation function. If the track where the trolley is located is inclined, the accumulated trolley will slide along the track under its own gravity before being pushed forward by the push rod on the chain, thereby affecting its normal conveying. SUMMARY

[0004] Therefore, it is necessary to provide a heavy-duty accumulation chain conveying device to solve the technical problem that the current accumulation chain trolley cannot be normally conveyed on the inclined track.

[0005] The above-mentioned purpose is realized by the following technical scheme: A heavy-duty stacking chain conveyor includes a conveyor track and multiple stacking trolleys. The conveyor track is equipped with blocking blocks that have extended and retracted states. The stacking trolleys are used to lift heavy goods and can move along the conveyor track in a forward-backward direction. Each stacking trolley includes a trolley body, a lifting claw, and a crank arm. The trolley body has a first roller and a second roller rotatably mounted on it. The first roller and the second roller are arranged alternately from front to back and can both roll forward and backward on the conveyor track. The axes of the first roller and the second roller both extend along a first direction, which is a horizontal direction perpendicular to the forward-backward direction. The lifting claw is T-shaped, with its central portion extending vertically and located between the first roller and the second roller. The lifting claw is slidably mounted in the vertical direction. A rack is hinged to the lifting claw on the trolley body, and a second gear is coaxially mounted on the second roller. The crank arm is hinged to the trolley body, with one end of the crank arm slidably connected to the lifting claw and the other end of the crank arm engaging with the blocking block. A spring is provided between the crank arm and the trolley body, and the spring has a tendency to push the crank arm to slide upward against the lifting claw. When the trolley is stacking forward, the blocking block is in an extended state. The blocking block engages with the end of the crank arm away from the lifting claw, which can pull the lifting claw downward, so that the lifting claw simultaneously restricts the first roller and the second roller from rotating forward. At the same time, the rack on the lifting claw can mesh with the second gear. Therefore, when the trolley is released from stacking, the blocking block is in a retracted state, and the rack and the second gear remain engaged to prevent the trolley from moving back and forth.

[0006] Furthermore, a first gear is coaxially mounted on the first roller, and the lifting claw can simultaneously press the first gear and the second gear, thereby restricting the forward rolling of the first roller and the second roller.

[0007] Furthermore, the trolley body is provided with a guide block, the lifting claw is provided with a guide groove, both the guide block and the guide groove are rectangular structures, the guide block and the guide groove slide in the vertical direction, the crank arm is provided with a horizontal sliding groove, the lifting claw is provided with a hinge shaft, the hinge shaft extends in the first direction, and the hinge shaft can slide back and forth along the horizontal sliding groove.

[0008] Furthermore, a spring is provided between the crank arm and the trolley body, and the spring has a tendency to push the crank arm to slide upward against the lifting claw; the spring is V-shaped, and a fixing plate is provided on the trolley body; one side of the spring is pressed and engaged with the end of the crank arm near the lifting claw, and the other side of the spring is detachably connected to the fixing plate.

[0009] Furthermore, the lifting claw has a rotating groove inside, and the rack is hinged in the rotating groove around an axis extending in the first direction. The top of the lifting claw has a clearance groove, and a lifting block is provided in the clearance groove. The lifting block can slide up and down along the clearance groove. The lower surface of the lifting block is pressed against the upper end surface of the rack, so that the downward movement of the lifting block can drive the rack to rotate in the rotating groove, causing the rack to disengage from the second gear.

[0010] Furthermore, the conveying track includes an upper track and a lower track arranged in parallel. The upper track is provided with a drive chain that can move in a cycle. A push rod is rotatably provided on the drive chain. The lifting block has an inclined surface arranged facing backward. The push rod contacts the inclined surface of the lifting block and can push the lifting block to slide downward in the clearance groove, thereby releasing the brake on the second roller and driving the first roller and the second roller to slide along the lower track.

[0011] Furthermore, the bottom of the clearance groove is provided with a compression spring, which has a tendency to cause the lifting block to return to its original position.

[0012] Furthermore, the sidewall of the clearance groove is provided with a sliding groove extending in the vertical direction. There are two sliding grooves, which are symmetrically arranged on the front and rear sides of the clearance groove. The lifting block is provided with a slider, which corresponds to the sliding groove and slides up and down in cooperation.

[0013] Furthermore, a drive cylinder is provided on the side of the lower track. The drive cylinder has a piston rod, and the blocking block is fixedly connected to the piston rod. The drive cylinder can extend and retract the piston rod along the axial direction of the first roller and the second roller, thereby controlling the blocking block to be in an extended or retracted state.

[0014] Furthermore, the blocking block is a wedge-shaped block with its inclined surface facing rearward. The contact between the inclined surface of the wedge-shaped block and the end of the crank arm away from the lifting claw can cause the crank arm to rotate.

[0015] The beneficial effects of this invention are: The heavy-duty accumulation chain conveyor device provided by the present invention, firstly, by setting a rack and a second gear, the second gear and the rack mesh when the accumulation trolley is accumulating, so that the rack and the second gear remain meshed even when the blocking block is in the retracted state, which can prevent the accumulation trolley from moving and avoid the accumulation trolley from automatically sliding along the conveyor track due to the tilt of the conveyor track after the accumulation trolley is cleared, thus ensuring that the accumulation trolley can be conveyed normally. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of a heavy-duty accumulation chain conveyor provided in an embodiment of the present invention; Figure 2This is a schematic diagram of the structure of the accumulation trolley and the conveying track in a heavy-duty accumulation chain conveyor according to an embodiment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the accumulation trolley and the conveying track in a heavy-duty accumulation chain conveyor according to an embodiment of the present invention. Figure 2 ; Figure 4 for Figure 3 A side view diagram; Figure 5 This is a three-dimensional structural diagram of the accumulation trolley in a heavy-duty accumulation chain conveyor according to an embodiment of the present invention; Figure 6 This is a front view schematic diagram of the accumulation trolley in a heavy-duty accumulation chain conveyor provided in an embodiment of the present invention; Figure 7 for Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 This is a side view of the accumulation trolley in a heavy-duty accumulation chain conveyor according to an embodiment of the present invention; Figure 9 for Figure 8 BB section view; Figure 10 for Figure 9 Another state diagram; Figure 11 for Figure 9 Enlarged view of the structure at point C; Figure 12 for Figure 9 Enlarged view of the structure at point D; Figure 13 for Figure 9 Enlarged view of the structure at point E in the middle.

[0017] in: 100. Heavy cargo; 101. Upper rail; 102. Lower rail; 103. Push rod; 104. C-shaped steel; 105. Blocking block; 106. Drive cylinder; 110. Trolley body; 111. Crank arm; 1111. Horizontal slide; 112. Lifting claw; 1121. Hinge shaft; 113. First roller; 114. Lifting block; 115. Spring; 116. Rack; 117. Guide block; 118. Second gear; 119. Compression spring; 120. Second roller; 121. Guide wheel; 122. First gear; 130. Sliding trolley; 131. Push rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They 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, and therefore should not be construed as limiting the invention.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1 to 13 As shown, an embodiment of the present invention provides a heavy-duty accumulation chain conveyor device, including a conveyor track and multiple accumulation trolleys. The accumulation trolleys are used to lift heavy goods 100 and can move along the conveyor track in a back-and-forth direction. The conveyor track can be straight or curved. A blocking block 105 is provided on the conveyor track, and the blocking block 105 has an extended state and a retracted state.

[0022] The accumulating trolley includes a trolley body 110, a lifting claw 112, and a crank arm 111. The trolley body 110 is rotatably equipped with a first roller 113 and a second roller 120. The first roller 113 and the second roller 120 are arranged alternately from front to back, and the axes of the first roller 113 and the second roller 120 both extend along a first direction, which is a horizontal direction perpendicular to the front-back direction. The first roller 113 and the second roller 120 can both roll back and forth on the conveying track.

[0023] The lifting claw 112 is T-shaped, with its middle part extending vertically and located between the first roller 113 and the second roller 120. The lifting claw 112 is slidably mounted on the trolley body 110 in the vertical direction, and a rack 116 is hinged to the lifting claw 112. A second gear 118 is coaxially mounted on the second roller 120. The crank arm 111 is hinged to the trolley body 110, with one end of the crank arm 111 slidably connected to the lifting claw 112, and the other end of the crank arm 111 used to cooperate with the blocking block 105.

[0024] When the trolley is stacking forward, the blocking block 105 is in an extended state. The blocking block 105 and the end of the crank arm 111 away from the lifting claw 112 are engaged to stop the crank arm 111 from rotating around the horizontal axis, thereby pulling the lifting claw 112 to slide downward. The lifting claw 112 can simultaneously restrict the forward rotation of the first roller 113 and the second roller 120. At the same time, the rack 116 on the lifting claw 112 can mesh with the second gear 118. Therefore, when the trolley is released from stacking, the blocking block 105 is in a retracted state, and the rack 116 and the second gear 118 remain engaged to prevent the trolley from moving forward or backward.

[0025] Specifically, a first gear 122 is coaxially fixed on the first roller 113, and a second gear 118 is coaxially fixed on the second roller 120. The lifting claw 112 can simultaneously press the first gear 122 and the second gear 118, thereby restricting the forward rolling of the first roller and the second roller.

[0026] The lifting claw 112 has two clamping portions distributed along the front-to-back direction, with a vertical portion in the middle of the two clamping portions located between the first roller 113 and the second roller 120. When the lifting claw 112 descends, the two clamping portions contact and clamp the outer peripheral surfaces of the first gear 122 and the second gear 118 respectively, thereby restricting the forward rolling of the first roller 113 and the second roller 120, and consequently restricting the movement of the trolley body 110 on the conveying track. In other embodiments, the first gear 122 can be replaced with a rubber wheel.

[0027] The first roller 113 and the second roller 120 are both rubber wheels, and there are two of each roller 113 and roller 120 along their axial direction, and the first roller 113 and the second roller 120 correspond one-to-one in the front-back direction.

[0028] In this embodiment, due to the large volume of the heavy cargo 100, three sliding trolleys 130 are provided behind the accumulation trolley on the conveying track to ensure lifting balance. The three sliding trolleys 130, together with the accumulation trolley and the lifting device, jointly lift the heavy cargo 100. The rearmost sliding trolley 130 is equipped with a top rod 131, which can engage with the crank arm 111 on the rear accumulation trolley to stop the rear accumulation trolley from sliding forward automatically.

[0029] As the accumulating carts stack forward, the lifting claw 112 slides downward, simultaneously contacting and pressing the first gear 122 and the second gear 118, preventing the first roller 113 and the second roller 120 from rolling forward, thus stopping the accumulating carts from moving along the conveyor track. Simultaneously, the rack 116 on the lifting claw 112 meshes with the second gear 118, locking it in place. When the accumulating carts are released from stacking, the blocking block 105 is in a retracted state, and the rack 116 moves upward synchronously, causing the second gear 118 to tend to rotate backward. The second gear 118 causes the second roller 120 to tend to roll away from the blocking block 105. Since there are multiple accumulating carts behind the second roller 120, the second roller 120 cannot overcome the static friction of the multiple accumulating carts and rolls backward, meaning the accumulating carts cannot move backward. At this time, the conveyor track tilts forward, causing the first roller 113 and the second roller 120 of the accumulation trolley to tend to roll forward. The forward rolling of the second roller 120 causes the rack 116 to move downwards, which in turn drives the lifting claw 112 to move downwards again, pressing the first gear 122 and the second gear 118 together. This prevents the first roller 113 and the second roller 120 from continuing to roll forward, thus preventing the accumulation trolley from moving forward. This prevents the accumulation trolley from moving back and forth, avoiding the accumulation trolley from automatically sliding along the conveyor track after the accumulation is cleared, ensuring the accumulation trolley can be transported normally.

[0030] Furthermore, the trolley body 110 is provided with a guide block 117, and the lifting claw 112 is provided with a guide groove. Both the guide block 117 and the guide groove are rectangular structures, and the guide block 117 and the guide groove slide together in the vertical direction.

[0031] This ensures that the lifting claw 112 can only slide in the up and down direction, making the trajectory of the lifting claw 112 more accurate when moving up and down, avoiding skewness, shaking and other situations, and ensuring accurate and reliable cooperation between the lifting claw 112, the first gear 122 and the second gear 118.

[0032] The crank arm 111 is provided with a horizontal slide groove 1111, and the lifting claw 112 is provided with a hinge shaft 1121. The hinge shaft 1121 extends along a first direction and can slide back and forth along the horizontal slide groove 1111.

[0033] When the crank arm 111 rotates around the horizontal axis, the trajectory of its end is arc-shaped. Through the sliding engagement of the horizontal slide groove 1111 and the hinge shaft 1121, the arc-shaped rotation of the crank arm 111 can be converted into the vertical sliding of the lifting claw 112. The relative sliding of the hinge shaft 1121 along the horizontal slide groove 1111 can compensate for the horizontal displacement component when the crank arm 111 rotates, retaining only the vertical driving force on the lifting claw 112, ensuring that the lifting claw 112 moves strictly in the vertical direction and avoiding motion interference.

[0034] Furthermore, a spring piece 115 is provided between the crank arm 111 and the trolley body 110. The spring piece 115 has the tendency to push the crank arm 111 to slide upward against the lifting claw 112. The spring piece 115 is V-shaped. A fixing plate is provided on the trolley body 110. One side of the spring piece 115 is pressed and engaged with the end of the crank arm 111 near the lifting claw 112. The other side of the spring piece 115 is detachably connected to the fixing plate.

[0035] When the crank arm 111 is triggered by the blocking block 105 to rotate around the horizontal axis, it will squeeze one side of the V-shaped spring 115, causing the spring 115 to undergo elastic deformation and the V-shaped angle to shrink. When the blocking block 105 releases its obstruction to the crank arm 111, the deformation potential energy of the spring 115 will be converted into a top pressure along the reset direction of the crank arm 111, pushing the crank arm 111 back to its initial position.

[0036] Furthermore, the lifting claw 112 has a rotating groove inside, and the rack 116 is hinged in the rotating groove around an axis extending in the first direction. The top of the lifting claw 112 has a clearance groove, and the clearance groove has a lifting block 114. The lifting block 114 can slide up and down along the clearance groove. The lower surface of the lifting block 114 presses against the upper end surface of the rack 116, so that the downward movement of the lifting block 114 can drive the rack 116 to rotate in the rotating groove, so that the rack 116 disengages from the second gear 118.

[0037] By converting the vertical downward movement of the lifting block 114 into the rotation of the rack 116 in the rotating slot, the rack 116 and the second gear 118 can be quickly disengaged, allowing the accumulating trolley to move smoothly.

[0038] A torsion spring is also provided at the hinge position between the rack 116 and the rotating groove. The torsion spring can cause the rack 116 to reset, so that the rack 116 can re-mesh with the second gear 118.

[0039] Furthermore, the conveying track includes an upper track 101 and a lower track 102 arranged in parallel. The upper track 101 is provided with a drive chain that can move in a cycle. A push rod 103 is rotatably provided on the drive chain. The lifting block 114 has an inclined surface arranged facing rearward. The push rod 103 contacts the inclined surface of the lifting block 114 and can push the lifting block 114 to slide downward in the clearance groove, thereby releasing the brake on the second roller 120 and driving the first roller 113 and the second roller 120 to slide along the lower track 102.

[0040] The upper track 101 is a hollow steel structure, and a rolling wheel is provided on the drive chain. The rolling wheel is located in the upper track 101 and can slide along the upper track 101. The drive chain is located at the bottom of the upper track 101.

[0041] The lower track 102 is composed of two U-shaped H-beams, spaced apart with their openings facing each other. Two first rollers 113 slide along the interior of one H-beam, and two second rollers 120 slide along the interior of the other H-beam. Both the upper track 101 and the lower track 102 are fixedly connected to the C-shaped steel 104 by bolts. The sliding trolley 130 is equipped with pulleys that can slide along the lower track 102. The trolley body 110 is also equipped with guide wheels 121, two in the front and two in the rear. The axis of the guide wheels 121 extends vertically, allowing them to roll within the gap between the two U-shaped H-beams.

[0042] The push rod 103 is rotatably mounted on the drive chain around a horizontal axis. The push rod 103 has a horizontal state and a vertical state. When the push rod 103 is in the horizontal state, the push rod 103 will not contact the lifting block 114. When the push rod 103 is in the vertical state, the push rod 103 can contact the lifting block 114.

[0043] The lifting block 114 is provided with an inclined surface. When the push rod 103 contacts the inclined surface of the lifting block 114, the thrust is decomposed into a vertically downward component along the inclined surface. This downward component can push the lifting block 114 down to disengage the rack 116 from the second gear 118. At the same time, the thrust is also decomposed into a horizontally forward component, which can drive the accumulating trolley forward.

[0044] Furthermore, the bottom of the clearance groove is provided with a compression spring 119, which has the tendency to cause the lifting block 114 to return to its original position.

[0045] The compression spring 119 is used to reset the lifting block 114 when the accumulating trolley moves to the next fixed position, so as to facilitate subsequent push-and-pull cooperation with the push rod 103.

[0046] Furthermore, the sidewall of the clearance groove is provided with a sliding groove extending in the vertical direction. There are two sliding grooves, which are symmetrically arranged on the front and rear sides of the clearance groove. The lifting block 114 is provided with a slider, which corresponds to the sliding groove and slides up and down in cooperation.

[0047] Furthermore, a drive cylinder 106 is provided on the side of the lower track 102. The drive cylinder 106 has a piston rod. The blocking block 105 is fixedly connected to the piston rod. The drive cylinder 106 can extend and retract the piston rod along the axial direction of the first roller 113 and the second roller 120, thereby controlling the blocking block 105 to be in an extended or retracted state.

[0048] Furthermore, the blocking block 105 is a wedge-shaped block with its inclined surface facing rearward. The contact between the inclined surface of the wedge-shaped block and the end of the crank arm 111 away from the lifting claw 112 can cause the crank arm 111 to rotate.

[0049] The contact between the inclined surface of the wedge block and the crank arm 111 is progressive, which can effectively absorb impact energy, avoid rigid collisions, and extend the service life of the stacking trolley.

[0050] Based on the above embodiments, the usage principle and working process of the embodiments of the present invention are as follows: Heavy cargo 100 is hoisted onto the stacking trolley and sliding trolley 130. The stacking trolley, sliding trolley, and the hoisted heavy cargo 100 then move forward along the lower track 102 along the drive chain. When it is necessary to stack the heavy cargo 100, the piston rod is extended by controlling the corresponding drive cylinder 106, causing the blocking block 105 to extend and block the foremost stacking trolley. Figure 9 As shown, the blocking block 105 will engage with the crank arm 111 to stop it, causing the crank arm 111 to rotate clockwise ( Figure 2 (Looking at the paper) Rotating causes the spring 115 to be compressed, which in turn pulls the lifting claw 112 to slide downward. The lifting claw 112 simultaneously contacts and presses against the first gear 122 and the second gear 118, making the first roller 113 and the second roller 120 unable to move, and thus the accumulating trolley stops moving along the lower track 102; at the same time, the rack 116 on the lifting claw 112 can mesh with the second gear 118, so that the second roller 120 is locked.

[0051] The push rod 131 on the rearmost sliding trolley 130 of the heavy cargo 100 can cause the crank arm 111 on the rear accumulation trolley to rotate clockwise, thereby causing the lifting claw 112 on the rear accumulation trolley to slide downward. The lifting claw 112 simultaneously contacts and presses against the first gear 122 and the second gear 118 of the rear accumulation trolley, making the first roller 113 and the second roller 120 unable to move, thereby stopping the rear accumulation trolley from moving along the lower track 102; at the same time, the rack 116 on the lifting claw 112 on the rear accumulation trolley can mesh with the second gear 118, causing the second roller 120 to be locked as well.

[0052] This process is repeated to stack multiple heavy goods 100 on the lower track 102 in sequence.

[0053] After processing the heavy cargo 100, when it needs to proceed to the next process, the blocking block 105 is first retracted by the drive cylinder 106. Under the elastic potential energy of the spring 115, the crank arm 111 rotates counterclockwise. At this time, the lifting claw 112 slides upward, and the lifting claw 112 no longer presses against the first gear 122 and the second gear 118, allowing the first roller 113 and the second roller 120 to rotate. At the same time, the rack 116 moves upward synchronously, causing the second gear 118 to have a tendency to rotate clockwise. Consequently, the second gear 118 causes the second roller 120 to have a tendency to roll backward. Since there are multiple accumulation carts behind the second roller 120, the second roller 120 cannot overcome the static friction of the multiple accumulation carts and roll backward, that is, the accumulation carts cannot move backward. If the conveyor track tilts forward at this time, causing the first roller 113 and the second roller 120 of the accumulation cart to tend to roll forward, then the forward rolling of the second roller 120 will cause the rack 116 to move downward through the second gear 118. The rack 116 will then drive the lifting claw 112 to move downward again, pressing the first gear 122 and the second gear 118 together again, preventing the first roller 113 and the second roller 120 from rolling forward, thus preventing the accumulation cart from moving forward. This prevents the accumulation cart from moving back and forth, avoiding the accumulation cart from automatically sliding along the conveyor track after the accumulation is cleared due to the tilt of the conveyor track.

[0054] Then, the push rod 103 on the drive chain is rotated to a vertical position, causing the push rod 103 to push the lifting block 114 on the accumulation trolley, causing the lifting block 114 to slide downwards in the clearance groove of the lifting claw 112. Figure 10As shown, at this time, the lifting block 114 pushes the rack 116 to rotate in the rotating groove, causing the rack 116 to disengage from the second gear 118. At this time, the second roller 120 can roll forward, and under the action of the elastic potential energy of the spring piece 115, the lifting claw 112 is no longer obstructed by the second gear 118 and can automatically return to its original position, so that the lifting claw 112 no longer presses against the first gear 122 and the second gear 118. Then the first roller 113 and the second roller 120 can roll forward, and then under the pushing action of the push rod 103, the accumulating trolley drives the heavy cargo 100 to continue to slide forward along the lower track 102.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A heavy-duty accumulation chain conveyor, characterized in that, include: A conveyor track, wherein a blocking block is provided on the conveyor track, and the blocking block has an extended state and a retracted state; Multiple stacking trolleys are used for lifting heavy goods. The stacking trolleys can move along the conveying track in the forward and backward direction. The accumulating trolley includes a trolley body, a lifting claw, and a crank arm; The trolley body is rotatably equipped with a first roller and a second roller. The first roller and the second roller are arranged alternately from front to back and can both roll back and forth on the conveying track. The axes of the first roller and the second roller both extend along a first direction, which is a horizontal direction perpendicular to the front and back direction. The lifting claw is T-shaped, with its middle part extending in the vertical direction and located between the first roller and the second roller; the lifting claw is slidably mounted on the trolley body in the vertical direction, and a rack is hinged on the lifting claw, and a second gear is coaxially mounted on the second roller. The crank arm is hinged to the trolley body, with one end of the crank arm slidably connected to the lifting claw and the other end of the crank arm used to cooperate with the blocking block. When the trolley is stacking forward, the blocking block is in the extended state. The blocking block and the end of the crank arm away from the lifting claw can stop the lifting claw from sliding downward, so that the lifting claw can simultaneously restrict the forward rolling of the first roller and the second roller. At the same time, the rack on the lifting claw can mesh with the second gear. Therefore, when the trolley is released from stacking, the blocking block is in the retracted state, and the rack and the second gear remain engaged to prevent the trolley from moving back and forth.

2. The heavy-duty accumulation chain conveyor according to claim 1, characterized in that, The first roller is coaxially equipped with a first gear, and the lifting claw can simultaneously press the first gear and the second gear, thereby restricting the forward rolling of the first roller and the second roller.

3. The heavy-duty accumulation chain conveyor according to claim 2, characterized in that, The trolley body is provided with a guide block, the lifting claw is provided with a guide groove, both the guide block and the guide groove are rectangular structures, the guide block and the guide groove slide in the vertical direction, the crank arm is provided with a horizontal slide groove, the lifting claw is provided with a hinge shaft, the hinge shaft extends in the first direction, and the hinge shaft can slide back and forth along the horizontal slide groove.

4. The heavy-duty accumulation chain conveyor according to claim 3, characterized in that, A spring is provided between the crank arm and the trolley body, and the spring has a tendency to make the crank arm push the lifting claw to slide upward. The spring is V-shaped, and a fixing plate is provided on the trolley body. One side of the spring is pressed and engaged with the end of the crank arm near the lifting claw, and the other side of the spring is detachably connected to the fixing plate.

5. The heavy-duty accumulation chain conveyor according to claim 4, characterized in that, The lifting claw has a rotating groove inside, and the rack is hinged in the rotating groove around an axis extending in the first direction. The top of the lifting claw has a clearance groove, and a lifting block is provided in the clearance groove. The lifting block can slide up and down along the clearance groove. The lower surface of the lifting block is pressed against the upper end surface of the rack, so that the downward movement of the lifting block can drive the rack to rotate in the rotating groove, causing the rack to disengage from the second gear.

6. The heavy-duty accumulation chain conveyor according to claim 5, characterized in that, The conveying track includes an upper track and a lower track arranged in parallel. The upper track is provided with a drive chain that can move in a cycle. A push rod is rotatably provided on the drive chain. The lifting block has an inclined surface arranged facing backward. The push rod contacts the inclined surface of the lifting block and can push the lifting block to slide downward in the clearance groove, thereby releasing the brake on the second roller and driving the first roller and the second roller to slide along the lower track.

7. The heavy-duty accumulation chain conveyor according to claim 6, characterized in that, The bottom of the clearance groove is provided with a compression spring, which has the tendency to cause the lifting block to return to its original position.

8. The heavy-duty accumulation chain conveyor according to claim 7, characterized in that, The sidewall of the clearance groove is provided with a sliding groove extending in the vertical direction. There are two sliding grooves, which are symmetrically arranged on the front and rear sides of the clearance groove. The lifting block is provided with a slider, which corresponds to the sliding groove and slides up and down in cooperation.

9. The heavy-duty accumulation chain conveyor according to claim 6, characterized in that, A drive cylinder is provided on the side of the lower track. The drive cylinder has a piston rod. The blocking block is fixedly connected to the piston rod. The drive cylinder can extend and retract the piston rod along the axial direction of the first roller and the second roller, thereby controlling the blocking block to be in an extended or retracted state.

10. The heavy-duty accumulation chain conveyor according to claim 9, characterized in that, The blocking block is a wedge-shaped block with its inclined surface facing backward. The contact between the inclined surface of the wedge-shaped block and the end of the crank arm away from the lifting claw can cause the crank arm to rotate.

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